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/* Remote target communications for serial-line targets in custom GDB protocol Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc. This file is part of GDB. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ /* See the GDB User Guide for details of the GDB remote protocol. */ #include "defs.h" #include "gdb_string.h" #include <ctype.h> #include <fcntl.h> #include "inferior.h" #include "bfd.h" #include "symfile.h" #include "exceptions.h" #include "target.h" /*#include "terminal.h" */ #include "gdbcmd.h" #include "objfiles.h" #include "gdb-stabs.h" #include "gdbthread.h" #include "remote.h" #include "regcache.h" #include "value.h" #include "gdb_assert.h" #include "observer.h" #include "solib.h" #include "cli/cli-decode.h" #include "cli/cli-setshow.h" #include "target-descriptions.h" #include <ctype.h> #include <sys/time.h> #include "event-loop.h" #include "event-top.h" #include "inf-loop.h" #include <signal.h> #include "serial.h" #include "gdbcore.h" /* for exec_bfd */ #include "remote-fileio.h" #include "gdb/fileio.h" #include "memory-map.h" /* The size to align memory write packets, when practical. The protocol does not guarantee any alignment, and gdb will generate short writes and unaligned writes, but even as a best-effort attempt this can improve bulk transfers. For instance, if a write is misaligned relative to the target's data bus, the stub may need to make an extra round trip fetching data from the target. This doesn't make a huge difference, but it's easy to do, so we try to be helpful. The alignment chosen is arbitrary; usually data bus width is important here, not the possibly larger cache line size. */ enum { REMOTE_ALIGN_WRITES = 16 }; /* Prototypes for local functions. */ static void cleanup_sigint_signal_handler (void *dummy); static void initialize_sigint_signal_handler (void); static int getpkt_sane (char **buf, long *sizeof_buf, int forever); static void handle_remote_sigint (int); static void handle_remote_sigint_twice (int); static void async_remote_interrupt (gdb_client_data); void async_remote_interrupt_twice (gdb_client_data); static void remote_files_info (struct target_ops *ignore); static void remote_prepare_to_store (struct regcache *regcache); static void remote_fetch_registers (struct regcache *regcache, int regno); static void remote_resume (ptid_t ptid, int step, enum target_signal siggnal); static void remote_async_resume (ptid_t ptid, int step, enum target_signal siggnal); static void remote_open (char *name, int from_tty); static void remote_async_open (char *name, int from_tty); static void extended_remote_open (char *name, int from_tty); static void extended_remote_async_open (char *name, int from_tty); static void remote_open_1 (char *, int, struct target_ops *, int extended_p, int async_p); static void remote_close (int quitting); static void remote_store_registers (struct regcache *regcache, int regno); static void remote_mourn (void); static void remote_async_mourn (void); static void extended_remote_restart (void); static void extended_remote_mourn (void); static void remote_mourn_1 (struct target_ops *); static void remote_send (char **buf, long *sizeof_buf_p); static int readchar (int timeout); static ptid_t remote_wait (ptid_t ptid, struct target_waitstatus *status); static ptid_t remote_async_wait (ptid_t ptid, struct target_waitstatus *status); static void remote_kill (void); static void remote_async_kill (void); static int tohex (int nib); static void remote_detach (char *args, int from_tty); static void remote_interrupt (int signo); static void remote_interrupt_twice (int signo); static void interrupt_query (void); static void set_thread (int, int); static int remote_thread_alive (ptid_t); static void get_offsets (void); static void skip_frame (void); static long read_frame (char **buf_p, long *sizeof_buf); static int hexnumlen (ULONGEST num); static void init_remote_ops (void); static void init_extended_remote_ops (void); static void remote_stop (void); static int ishex (int ch, int *val); static int stubhex (int ch); static int hexnumstr (char *, ULONGEST); static int hexnumnstr (char *, ULONGEST, int); static CORE_ADDR remote_address_masked (CORE_ADDR); static void print_packet (char *); static unsigned long crc32 (unsigned char *, int, unsigned int); static void compare_sections_command (char *, int); static void packet_command (char *, int); static int stub_unpack_int (char *buff, int fieldlength); static ptid_t remote_current_thread (ptid_t oldptid); static void remote_find_new_threads (void); static void record_currthread (int currthread); static int fromhex (int a); static int hex2bin (const char *hex, gdb_byte *bin, int count); static int bin2hex (const gdb_byte *bin, char *hex, int count); static int putpkt_binary (char *buf, int cnt); static void check_binary_download (CORE_ADDR addr); struct packet_config; static void show_packet_config_cmd (struct packet_config *config); static void update_packet_config (struct packet_config *config); static void set_remote_protocol_packet_cmd (char *args, int from_tty, struct cmd_list_element *c); static void show_remote_protocol_packet_cmd (struct ui_file *file, int from_tty, struct cmd_list_element *c, const char *value); void _initialize_remote (void); /* For "remote". */ static struct cmd_list_element *remote_cmdlist; /* For "set remote" and "show remote". */ static struct cmd_list_element *remote_set_cmdlist; static struct cmd_list_element *remote_show_cmdlist; /* Description of the remote protocol state for the currently connected target. This is per-target state, and independent of the selected architecture. */ struct remote_state { /* A buffer to use for incoming packets, and its current size. The buffer is grown dynamically for larger incoming packets. Outgoing packets may also be constructed in this buffer. BUF_SIZE is always at least REMOTE_PACKET_SIZE; REMOTE_PACKET_SIZE should be used to limit the length of outgoing packets. */ char *buf; long buf_size; /* If we negotiated packet size explicitly (and thus can bypass heuristics for the largest packet size that will not overflow a buffer in the stub), this will be set to that packet size. Otherwise zero, meaning to use the guessed size. */ long explicit_packet_size; /* remote_wait is normally called when the target is running and waits for a stop reply packet. But sometimes we need to call it when the target is already stopped. We can send a "?" packet and have remote_wait read the response. Or, if we already have the response, we can stash it in BUF and tell remote_wait to skip calling getpkt. This flag is set when BUF contains a stop reply packet and the target is not waiting. */ int cached_wait_status; }; /* This data could be associated with a target, but we do not always have access to the current target when we need it, so for now it is static. This will be fine for as long as only one target is in use at a time. */ static struct remote_state remote_state; static struct remote_state * get_remote_state_raw (void) { return &remote_state; } /* Description of the remote protocol for a given architecture. */ struct packet_reg { long offset; /* Offset into G packet. */ long regnum; /* GDB's internal register number. */ LONGEST pnum; /* Remote protocol register number. */ int in_g_packet; /* Always part of G packet. */ /* long size in bytes; == register_size (current_gdbarch, regnum); at present. */ /* char *name; == gdbarch_register_name (current_gdbarch, regnum); at present. */ }; struct remote_arch_state { /* Description of the remote protocol registers. */ long sizeof_g_packet; /* Description of the remote protocol registers indexed by REGNUM (making an array gdbarch_num_regs in size). */ struct packet_reg *regs; /* This is the size (in chars) of the first response to the ``g'' packet. It is used as a heuristic when determining the maximum size of memory-read and memory-write packets. A target will typically only reserve a buffer large enough to hold the ``g'' packet. The size does not include packet overhead (headers and trailers). */ long actual_register_packet_size; /* This is the maximum size (in chars) of a non read/write packet. It is also used as a cap on the size of read/write packets. */ long remote_packet_size; }; /* Handle for retreving the remote protocol data from gdbarch. */ static struct gdbarch_data *remote_gdbarch_data_handle; static struct remote_arch_state * get_remote_arch_state (void) { return gdbarch_data (current_gdbarch, remote_gdbarch_data_handle); } /* Fetch the global remote target state. */ static struct remote_state * get_remote_state (void) { /* Make sure that the remote architecture state has been initialized, because doing so might reallocate rs->buf. Any function which calls getpkt also needs to be mindful of changes to rs->buf, but this call limits the number of places which run into trouble. */ get_remote_arch_state (); return get_remote_state_raw (); } static int compare_pnums (const void *lhs_, const void *rhs_) { const struct packet_reg * const *lhs = lhs_; const struct packet_reg * const *rhs = rhs_; if ((*lhs)->pnum < (*rhs)->pnum) return -1; else if ((*lhs)->pnum == (*rhs)->pnum) return 0; else return 1; } static void * init_remote_state (struct gdbarch *gdbarch) { int regnum, num_remote_regs, offset; struct remote_state *rs = get_remote_state_raw (); struct remote_arch_state *rsa; struct packet_reg **remote_regs; rsa = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct remote_arch_state); /* Use the architecture to build a regnum<->pnum table, which will be 1:1 unless a feature set specifies otherwise. */ rsa->regs = GDBARCH_OBSTACK_CALLOC (gdbarch, gdbarch_num_regs (gdbarch), struct packet_reg); for (regnum = 0; regnum < gdbarch_num_regs (gdbarch); regnum++) { struct packet_reg *r = &rsa->regs[regnum]; if (register_size (gdbarch, regnum) == 0) /* Do not try to fetch zero-sized (placeholder) registers. */ r->pnum = -1; else r->pnum = gdbarch_remote_register_number (gdbarch, regnum); r->regnum = regnum; } /* Define the g/G packet format as the contents of each register with a remote protocol number, in order of ascending protocol number. */ remote_regs = alloca (gdbarch_num_regs (gdbarch) * sizeof (struct packet_reg *)); for (num_remote_regs = 0, regnum = 0; regnum < gdbarch_num_regs (gdbarch); regnum++) if (rsa->regs[regnum].pnum != -1) remote_regs[num_remote_regs++] = &rsa->regs[regnum]; qsort (remote_regs, num_remote_regs, sizeof (struct packet_reg *), compare_pnums); for (regnum = 0, offset = 0; regnum < num_remote_regs; regnum++) { remote_regs[regnum]->in_g_packet = 1; remote_regs[regnum]->offset = offset; offset += register_size (gdbarch, remote_regs[regnum]->regnum); } /* Record the maximum possible size of the g packet - it may turn out to be smaller. */ rsa->sizeof_g_packet = offset; /* Default maximum number of characters in a packet body. Many remote stubs have a hardwired buffer size of 400 bytes (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used as the maximum packet-size to ensure that the packet and an extra NUL character can always fit in the buffer. This stops GDB trashing stubs that try to squeeze an extra NUL into what is already a full buffer (As of 1999-12-04 that was most stubs). */ rsa->remote_packet_size = 400 - 1; /* This one is filled in when a ``g'' packet is received. */ rsa->actual_register_packet_size = 0; /* Should rsa->sizeof_g_packet needs more space than the default, adjust the size accordingly. Remember that each byte is encoded as two characters. 32 is the overhead for the packet header / footer. NOTE: cagney/1999-10-26: I suspect that 8 (``$NN:G...#NN'') is a better guess, the below has been padded a little. */ if (rsa->sizeof_g_packet > ((rsa->remote_packet_size - 32) / 2)) rsa->remote_packet_size = (rsa->sizeof_g_packet * 2 + 32); /* Make sure that the packet buffer is plenty big enough for this architecture. */ if (rs->buf_size < rsa->remote_packet_size) { rs->buf_size = 2 * rsa->remote_packet_size; rs->buf = xrealloc (rs->buf, rs->buf_size); } return rsa; } /* Return the current allowed size of a remote packet. This is inferred from the current architecture, and should be used to limit the length of outgoing packets. */ static long get_remote_packet_size (void) { struct remote_state *rs = get_remote_state (); struct remote_arch_state *rsa = get_remote_arch_state (); if (rs->explicit_packet_size) return rs->explicit_packet_size; return rsa->remote_packet_size; } static struct packet_reg * packet_reg_from_regnum (struct remote_arch_state *rsa, long regnum) { if (regnum < 0 && regnum >= gdbarch_num_regs (current_gdbarch)) return NULL; else { struct packet_reg *r = &rsa->regs[regnum]; gdb_assert (r->regnum == regnum); return r; } } static struct packet_reg * packet_reg_from_pnum (struct remote_arch_state *rsa, LONGEST pnum) { int i; for (i = 0; i < gdbarch_num_regs (current_gdbarch); i++) { struct packet_reg *r = &rsa->regs[i]; if (r->pnum == pnum) return r; } return NULL; } /* FIXME: graces/2002-08-08: These variables should eventually be bound to an instance of the target object (as in gdbarch-tdep()), when such a thing exists. */ /* This is set to the data address of the access causing the target to stop for a watchpoint. */ static CORE_ADDR remote_watch_data_address; /* This is non-zero if target stopped for a watchpoint. */ static int remote_stopped_by_watchpoint_p; static struct target_ops remote_ops; static struct target_ops extended_remote_ops; /* Temporary target ops. Just like the remote_ops and extended_remote_ops, but with asynchronous support. */ static struct target_ops remote_async_ops; static struct target_ops extended_async_remote_ops; /* FIXME: cagney/1999-09-23: Even though getpkt was called with ``forever'' still use the normal timeout mechanism. This is currently used by the ASYNC code to guarentee that target reads during the initial connect always time-out. Once getpkt has been modified to return a timeout indication and, in turn remote_wait()/wait_for_inferior() have gained a timeout parameter this can go away. */ static int wait_forever_enabled_p = 1; /* This variable chooses whether to send a ^C or a break when the user requests program interruption. Although ^C is usually what remote systems expect, and that is the default here, sometimes a break is preferable instead. */ static int remote_break; /* Descriptor for I/O to remote machine. Initialize it to NULL so that remote_open knows that we don't have a file open when the program starts. */ static struct serial *remote_desc = NULL; /* This variable sets the number of bits in an address that are to be sent in a memory ("M" or "m") packet. Normally, after stripping leading zeros, the entire address would be sent. This variable restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The initial implementation of remote.c restricted the address sent in memory packets to ``host::sizeof long'' bytes - (typically 32 bits). Consequently, for 64 bit targets, the upper 32 bits of an address was never sent. Since fixing this bug may cause a break in some remote targets this variable is principly provided to facilitate backward compatibility. */ static int remote_address_size; /* Tempoary to track who currently owns the terminal. See target_async_terminal_* for more details. */ static int remote_async_terminal_ours_p; /* The executable file to use for "run" on the remote side. */ static char *remote_exec_file = ""; /* User configurable variables for the number of characters in a memory read/write packet. MIN (rsa->remote_packet_size, rsa->sizeof_g_packet) is the default. Some targets need smaller values (fifo overruns, et.al.) and some users need larger values (speed up transfers). The variables ``preferred_*'' (the user request), ``current_*'' (what was actually set) and ``forced_*'' (Positive - a soft limit, negative - a hard limit). */ struct memory_packet_config { char *name; long size; int fixed_p; }; /* Compute the current size of a read/write packet. Since this makes use of ``actual_register_packet_size'' the computation is dynamic. */ static long get_memory_packet_size (struct memory_packet_config *config) { struct remote_state *rs = get_remote_state (); struct remote_arch_state *rsa = get_remote_arch_state (); /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk law?) that some hosts don't cope very well with large alloca() calls. Eventually the alloca() code will be replaced by calls to xmalloc() and make_cleanups() allowing this restriction to either be lifted or removed. */ #ifndef MAX_REMOTE_PACKET_SIZE #define MAX_REMOTE_PACKET_SIZE 16384 #endif /* NOTE: 20 ensures we can write at least one byte. */ #ifndef MIN_REMOTE_PACKET_SIZE #define MIN_REMOTE_PACKET_SIZE 20 #endif long what_they_get; if (config->fixed_p) { if (config->size <= 0) what_they_get = MAX_REMOTE_PACKET_SIZE; else what_they_get = config->size; } else { what_they_get = get_remote_packet_size (); /* Limit the packet to the size specified by the user. */ if (config->size > 0 && what_they_get > config->size) what_they_get = config->size; /* Limit it to the size of the targets ``g'' response unless we have permission from the stub to use a larger packet size. */ if (rs->explicit_packet_size == 0 && rsa->actual_register_packet_size > 0 && what_they_get > rsa->actual_register_packet_size) what_they_get = rsa->actual_register_packet_size; } if (what_they_get > MAX_REMOTE_PACKET_SIZE) what_they_get = MAX_REMOTE_PACKET_SIZE; if (what_they_get < MIN_REMOTE_PACKET_SIZE) what_they_get = MIN_REMOTE_PACKET_SIZE; /* Make sure there is room in the global buffer for this packet (including its trailing NUL byte). */ if (rs->buf_size < what_they_get + 1) { rs->buf_size = 2 * what_they_get; rs->buf = xrealloc (rs->buf, 2 * what_they_get); } return what_they_get; } /* Update the size of a read/write packet. If they user wants something really big then do a sanity check. */ static void set_memory_packet_size (char *args, struct memory_packet_config *config) { int fixed_p = config->fixed_p; long size = config->size; if (args == NULL) error (_("Argument required (integer, `fixed' or `limited').")); else if (strcmp (args, "hard") == 0 || strcmp (args, "fixed") == 0) fixed_p = 1; else if (strcmp (args, "soft") == 0 || strcmp (args, "limit") == 0) fixed_p = 0; else { char *end; size = strtoul (args, &end, 0); if (args == end) error (_("Invalid %s (bad syntax)."), config->name); #if 0 /* Instead of explicitly capping the size of a packet to MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is instead allowed to set the size to something arbitrarily large. */ if (size > MAX_REMOTE_PACKET_SIZE) error (_("Invalid %s (too large)."), config->name); #endif } /* Extra checks? */ if (fixed_p && !config->fixed_p) { if (! query (_("The target may not be able to correctly handle a %s\n" "of %ld bytes. Change the packet size? "), config->name, size)) error (_("Packet size not changed.")); } /* Update the config. */ config->fixed_p = fixed_p; config->size = size; } static void show_memory_packet_size (struct memory_packet_config *config) { printf_filtered (_("The %s is %ld. "), config->name, config->size); if (config->fixed_p) printf_filtered (_("Packets are fixed at %ld bytes.\n"), get_memory_packet_size (config)); else printf_filtered (_("Packets are limited to %ld bytes.\n"), get_memory_packet_size (config)); } static struct memory_packet_config memory_write_packet_config = { "memory-write-packet-size", }; static void set_memory_write_packet_size (char *args, int from_tty) { set_memory_packet_size (args, &memory_write_packet_config); } static void show_memory_write_packet_size (char *args, int from_tty) { show_memory_packet_size (&memory_write_packet_config); } static long get_memory_write_packet_size (void) { return get_memory_packet_size (&memory_write_packet_config); } static struct memory_packet_config memory_read_packet_config = { "memory-read-packet-size", }; static void set_memory_read_packet_size (char *args, int from_tty) { set_memory_packet_size (args, &memory_read_packet_config); } static void show_memory_read_packet_size (char *args, int from_tty) { show_memory_packet_size (&memory_read_packet_config); } static long get_memory_read_packet_size (void) { long size = get_memory_packet_size (&memory_read_packet_config); /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an extra buffer size argument before the memory read size can be increased beyond this. */ if (size > get_remote_packet_size ()) size = get_remote_packet_size (); return size; } /* Generic configuration support for packets the stub optionally supports. Allows the user to specify the use of the packet as well as allowing GDB to auto-detect support in the remote stub. */ enum packet_support { PACKET_SUPPORT_UNKNOWN = 0, PACKET_ENABLE, PACKET_DISABLE }; struct packet_config { const char *name; const char *title; enum auto_boolean detect; enum packet_support support; }; /* Analyze a packet's return value and update the packet config accordingly. */ enum packet_result { PACKET_ERROR, PACKET_OK, PACKET_UNKNOWN }; static void update_packet_config (struct packet_config *config) { switch (config->detect) { case AUTO_BOOLEAN_TRUE: config->support = PACKET_ENABLE; break; case AUTO_BOOLEAN_FALSE: config->support = PACKET_DISABLE; break; case AUTO_BOOLEAN_AUTO: config->support = PACKET_SUPPORT_UNKNOWN; break; } } static void show_packet_config_cmd (struct packet_config *config) { char *support = "internal-error"; switch (config->support) { case PACKET_ENABLE: support = "enabled"; break; case PACKET_DISABLE: support = "disabled"; break; case PACKET_SUPPORT_UNKNOWN: support = "unknown"; break; } switch (config->detect) { case AUTO_BOOLEAN_AUTO: printf_filtered (_("Support for the `%s' packet is auto-detected, currently %s.\n"), config->name, support); break; case AUTO_BOOLEAN_TRUE: case AUTO_BOOLEAN_FALSE: printf_filtered (_("Support for the `%s' packet is currently %s.\n"), config->name, support); break; } } static void add_packet_config_cmd (struct packet_config *config, const char *name, const char *title, int legacy) { char *set_doc; char *show_doc; char *cmd_name; config->name = name; config->title = title; config->detect = AUTO_BOOLEAN_AUTO; config->support = PACKET_SUPPORT_UNKNOWN; set_doc = xstrprintf ("Set use of remote protocol `%s' (%s) packet", name, title); show_doc = xstrprintf ("Show current use of remote protocol `%s' (%s) packet", name, title); /* set/show TITLE-packet {auto,on,off} */ cmd_name = xstrprintf ("%s-packet", title); add_setshow_auto_boolean_cmd (cmd_name, class_obscure, &config->detect, set_doc, show_doc, NULL, /* help_doc */ set_remote_protocol_packet_cmd, show_remote_protocol_packet_cmd, &remote_set_cmdlist, &remote_show_cmdlist); /* set/show remote NAME-packet {auto,on,off} -- legacy. */ if (legacy) { char *legacy_name; legacy_name = xstrprintf ("%s-packet", name); add_alias_cmd (legacy_name, cmd_name, class_obscure, 0, &remote_set_cmdlist); add_alias_cmd (legacy_name, cmd_name, class_obscure, 0, &remote_show_cmdlist); } } static enum packet_result packet_check_result (const char *buf) { if (buf[0] != '\0') { /* The stub recognized the packet request. Check that the operation succeeded. */ if (buf[0] == 'E' && isxdigit (buf[1]) && isxdigit (buf[2]) && buf[3] == '\0') /* "Enn" - definitly an error. */ return PACKET_ERROR; /* Always treat "E." as an error. This will be used for more verbose error messages, such as E.memtypes. */ if (buf[0] == 'E' && buf[1] == '.') return PACKET_ERROR; /* The packet may or may not be OK. Just assume it is. */ return PACKET_OK; } else /* The stub does not support the packet. */ return PACKET_UNKNOWN; } static enum packet_result packet_ok (const char *buf, struct packet_config *config) { enum packet_result result; result = packet_check_result (buf); switch (result) { case PACKET_OK: case PACKET_ERROR: /* The stub recognized the packet request. */ switch (config->support) { case PACKET_SUPPORT_UNKNOWN: if (remote_debug) fprintf_unfiltered (gdb_stdlog, "Packet %s (%s) is supported\n", config->name, config->title); config->support = PACKET_ENABLE; break; case PACKET_DISABLE: internal_error (__FILE__, __LINE__, _("packet_ok: attempt to use a disabled packet")); break; case PACKET_ENABLE: break; } break; case PACKET_UNKNOWN: /* The stub does not support the packet. */ switch (config->support) { case PACKET_ENABLE: if (config->detect == AUTO_BOOLEAN_AUTO) /* If the stub previously indicated that the packet was supported then there is a protocol error.. */ error (_("Protocol error: %s (%s) conflicting enabled responses."), config->name, config->title); else /* The user set it wrong. */ error (_("Enabled packet %s (%s) not recognized by stub"), config->name, config->title); break; case PACKET_SUPPORT_UNKNOWN: if (remote_debug) fprintf_unfiltered (gdb_stdlog, "Packet %s (%s) is NOT supported\n", config->name, config->title); config->support = PACKET_DISABLE; break; case PACKET_DISABLE: break; } break; } return result; } enum { PACKET_vCont = 0, PACKET_X, PACKET_qSymbol, PACKET_P, PACKET_p, PACKET_Z0, PACKET_Z1, PACKET_Z2, PACKET_Z3, PACKET_Z4, PACKET_vFile_open, PACKET_vFile_pread, PACKET_vFile_pwrite, PACKET_vFile_close, PACKET_vFile_unlink, PACKET_qXfer_auxv, PACKET_qXfer_features, PACKET_qXfer_libraries, PACKET_qXfer_memory_map, PACKET_qXfer_spu_read, PACKET_qXfer_spu_write, PACKET_qGetTLSAddr, PACKET_qSupported, PACKET_QPassSignals, PACKET_vAttach, PACKET_vRun, PACKET_MAX }; static struct packet_config remote_protocol_packets[PACKET_MAX]; static void set_remote_protocol_packet_cmd (char *args, int from_tty, struct cmd_list_element *c) { struct packet_config *packet; for (packet = remote_protocol_packets; packet < &remote_protocol_packets[PACKET_MAX]; packet++) { if (&packet->detect == c->var) { update_packet_config (packet); return; } } internal_error (__FILE__, __LINE__, "Could not find config for %s", c->name); } static void show_remote_protocol_packet_cmd (struct ui_file *file, int from_tty, struct cmd_list_element *c, const char *value) { struct packet_config *packet; for (packet = remote_protocol_packets; packet < &remote_protocol_packets[PACKET_MAX]; packet++) { if (&packet->detect == c->var) { show_packet_config_cmd (packet); return; } } internal_error (__FILE__, __LINE__, "Could not find config for %s", c->name); } /* Should we try one of the 'Z' requests? */ enum Z_packet_type { Z_PACKET_SOFTWARE_BP, Z_PACKET_HARDWARE_BP, Z_PACKET_WRITE_WP, Z_PACKET_READ_WP, Z_PACKET_ACCESS_WP, NR_Z_PACKET_TYPES }; /* For compatibility with older distributions. Provide a ``set remote Z-packet ...'' command that updates all the Z packet types. */ static enum auto_boolean remote_Z_packet_detect; static void set_remote_protocol_Z_packet_cmd (char *args, int from_tty, struct cmd_list_element *c) { int i; for (i = 0; i < NR_Z_PACKET_TYPES; i++) { remote_protocol_packets[PACKET_Z0 + i].detect = remote_Z_packet_detect; update_packet_config (&remote_protocol_packets[PACKET_Z0 + i]); } } static void show_remote_protocol_Z_packet_cmd (struct ui_file *file, int from_tty, struct cmd_list_element *c, const char *value) { int i; for (i = 0; i < NR_Z_PACKET_TYPES; i++) { show_packet_config_cmd (&remote_protocol_packets[PACKET_Z0 + i]); } } /* Should we try the 'ThreadInfo' query packet? This variable (NOT available to the user: auto-detect only!) determines whether GDB will use the new, simpler "ThreadInfo" query or the older, more complex syntax for thread queries. This is an auto-detect variable (set to true at each connect, and set to false when the target fails to recognize it). */ static int use_threadinfo_query; static int use_threadextra_query; /* Tokens for use by the asynchronous signal handlers for SIGINT. */ static struct async_signal_handler *sigint_remote_twice_token; static struct async_signal_handler *sigint_remote_token; /* These are pointers to hook functions that may be set in order to modify resume/wait behavior for a particular architecture. */ void (*deprecated_target_resume_hook) (void); void (*deprecated_target_wait_loop_hook) (void); /* These are the threads which we last sent to the remote system. -1 for all or -2 for not sent yet. */ static int general_thread; static int continue_thread; /* Call this function as a result of 1) A halt indication (T packet) containing a thread id 2) A direct query of currthread 3) Successful execution of set thread */ static void record_currthread (int currthread) { general_thread = currthread; /* If this is a new thread, add it to GDB's thread list. If we leave it up to WFI to do this, bad things will happen. */ if (!in_thread_list (pid_to_ptid (currthread))) add_thread (pid_to_ptid (currthread)); } static char *last_pass_packet; /* If 'QPassSignals' is supported, tell the remote stub what signals it can simply pass through to the inferior without reporting. */ static void remote_pass_signals (void) { if (remote_protocol_packets[PACKET_QPassSignals].support != PACKET_DISABLE) { char *pass_packet, *p; int numsigs = (int) TARGET_SIGNAL_LAST; int count = 0, i; gdb_assert (numsigs < 256); for (i = 0; i < numsigs; i++) { if (signal_stop_state (i) == 0 && signal_print_state (i) == 0 && signal_pass_state (i) == 1) count++; } pass_packet = xmalloc (count * 3 + strlen ("QPassSignals:") + 1); strcpy (pass_packet, "QPassSignals:"); p = pass_packet + strlen (pass_packet); for (i = 0; i < numsigs; i++) { if (signal_stop_state (i) == 0 && signal_print_state (i) == 0 && signal_pass_state (i) == 1) { if (i >= 16) *p++ = tohex (i >> 4); *p++ = tohex (i & 15); if (count) *p++ = ';'; else break; count--; } } *p = 0; if (!last_pass_packet || strcmp (last_pass_packet, pass_packet)) { struct remote_state *rs = get_remote_state (); char *buf = rs->buf; putpkt (pass_packet); getpkt (&rs->buf, &rs->buf_size, 0); packet_ok (buf, &remote_protocol_packets[PACKET_QPassSignals]); if (last_pass_packet) xfree (last_pass_packet); last_pass_packet = pass_packet; } else xfree (pass_packet); } } #define MAGIC_NULL_PID 42000 static void set_thread (int th, int gen) { struct remote_state *rs = get_remote_state (); char *buf = rs->buf; int state = gen ? general_thread : continue_thread; if (state == th) return; buf[0] = 'H'; buf[1] = gen ? 'g' : 'c'; if (th == MAGIC_NULL_PID) { buf[2] = '0'; buf[3] = '\0'; } else if (th < 0) xsnprintf (&buf[2], get_remote_packet_size () - 2, "-%x", -th); else xsnprintf (&buf[2], get_remote_packet_size () - 2, "%x", th); putpkt (buf); getpkt (&rs->buf, &rs->buf_size, 0); if (gen) general_thread = th; else continue_thread = th; } /* Return nonzero if the thread TH is still alive on the remote system. */ static int remote_thread_alive (ptid_t ptid) { struct remote_state *rs = get_remote_state (); int tid = PIDGET (ptid); if (tid < 0) xsnprintf (rs->buf, get_remote_packet_size (), "T-%08x", -tid); else xsnprintf (rs->buf, get_remote_packet_size (), "T%08x", tid); putpkt (rs->buf); getpkt (&rs->buf, &rs->buf_size, 0); return (rs->buf[0] == 'O' && rs->buf[1] == 'K'); } /* About these extended threadlist and threadinfo packets. They are variable length packets but, the fields within them are often fixed length. They are redundent enough to send over UDP as is the remote protocol in general. There is a matching unit test module in libstub. */ #define OPAQUETHREADBYTES 8 /* a 64 bit opaque identifier */ typedef unsigned char threadref[OPAQUETHREADBYTES]; /* WARNING: This threadref data structure comes from the remote O.S., libstub protocol encoding, and remote.c. it is not particularly changable. */ /* Right now, the internal structure is int. We want it to be bigger. Plan to fix this. */ typedef int gdb_threadref; /* Internal GDB thread reference. */ /* gdb_ext_thread_info is an internal GDB data structure which is equivalent to the reply of the remote threadinfo packet. */ struct gdb_ext_thread_info { threadref threadid; /* External form of thread reference. */ int active; /* Has state interesting to GDB? regs, stack. */ char display[256]; /* Brief state display, name, blocked/suspended. */ char shortname[32]; /* To be used to name threads. */ char more_display[256]; /* Long info, statistics, queue depth, whatever. */ }; /* The volume of remote transfers can be limited by submitting a mask containing bits specifying the desired information. Use a union of these values as the 'selection' parameter to get_thread_info. FIXME: Make these TAG names more thread specific. */ #define TAG_THREADID 1 #define TAG_EXISTS 2 #define TAG_DISPLAY 4 #define TAG_THREADNAME 8 #define TAG_MOREDISPLAY 16 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2) char *unpack_varlen_hex (char *buff, ULONGEST *result); static char *unpack_nibble (char *buf, int *val); static char *pack_nibble (char *buf, int nibble); static char *pack_hex_byte (char *pkt, int /* unsigned char */ byte); static char *unpack_byte (char *buf, int *value); static char *pack_int (char *buf, int value); static char *unpack_int (char *buf, int *value); static char *unpack_string (char *src, char *dest, int length); static char *pack_threadid (char *pkt, threadref *id); static char *unpack_threadid (char *inbuf, threadref *id); void int_to_threadref (threadref *id, int value); static int threadref_to_int (threadref *ref); static void copy_threadref (threadref *dest, threadref *src); static int threadmatch (threadref *dest, threadref *src); static char *pack_threadinfo_request (char *pkt, int mode, threadref *id); static int remote_unpack_thread_info_response (char *pkt, threadref *expectedref, struct gdb_ext_thread_info *info); static int remote_get_threadinfo (threadref *threadid, int fieldset, /*TAG mask */ struct gdb_ext_thread_info *info); static char *pack_threadlist_request (char *pkt, int startflag, int threadcount, threadref *nextthread); static int parse_threadlist_response (char *pkt, int result_limit, threadref *original_echo, threadref *resultlist, int *doneflag); static int remote_get_threadlist (int startflag, threadref *nextthread, int result_limit, int *done, int *result_count, threadref *threadlist); typedef int (*rmt_thread_action) (threadref *ref, void *context); static int remote_threadlist_iterator (rmt_thread_action stepfunction, void *context, int looplimit); static int remote_newthread_step (threadref *ref, void *context); /* Encode 64 bits in 16 chars of hex. */ static const char hexchars[] = "0123456789abcdef"; static int ishex (int ch, int *val) { if ((ch >= 'a') && (ch <= 'f')) { *val = ch - 'a' + 10; return 1; } if ((ch >= 'A') && (ch <= 'F')) { *val = ch - 'A' + 10; return 1; } if ((ch >= '0') && (ch <= '9')) { *val = ch - '0'; return 1; } return 0; } static int stubhex (int ch) { if (ch >= 'a' && ch <= 'f') return ch - 'a' + 10; if (ch >= '0' && ch <= '9') return ch - '0'; if (ch >= 'A' && ch <= 'F') return ch - 'A' + 10; return -1; } static int stub_unpack_int (char *buff, int fieldlength) { int nibble; int retval = 0; while (fieldlength) { nibble = stubhex (*buff++); retval |= nibble; fieldlength--; if (fieldlength) retval = retval << 4; } return retval; } char * unpack_varlen_hex (char *buff, /* packet to parse */ ULONGEST *result) { int nibble; ULONGEST retval = 0; while (ishex (*buff, &nibble)) { buff++; retval = retval << 4; retval |= nibble & 0x0f; } *result = retval; return buff; } static char * unpack_nibble (char *buf, int *val) { *val = fromhex (*buf++); return buf; } static char * pack_nibble (char *buf, int nibble) { *buf++ = hexchars[(nibble & 0x0f)]; return buf; } static char * pack_hex_byte (char *pkt, int byte) { *pkt++ = hexchars[(byte >> 4) & 0xf]; *pkt++ = hexchars[(byte & 0xf)]; return pkt; } static char * unpack_byte (char *buf, int *value) { *value = stub_unpack_int (buf, 2); return buf + 2; } static char * pack_int (char *buf, int value) { buf = pack_hex_byte (buf, (value >> 24) & 0xff); buf = pack_hex_byte (buf, (value >> 16) & 0xff); buf = pack_hex_byte (buf, (value >> 8) & 0x0ff); buf = pack_hex_byte (buf, (value & 0xff)); return buf; } static char * unpack_int (char *buf, int *value) { *value = stub_unpack_int (buf, 8); return buf + 8; } #if 0 /* Currently unused, uncomment when needed. */ static char *pack_string (char *pkt, char *string); static char * pack_string (char *pkt, char *string) { char ch; int len; len = strlen (string); if (len > 200) len = 200; /* Bigger than most GDB packets, junk??? */ pkt = pack_hex_byte (pkt, len); while (len-- > 0) { ch = *string++; if ((ch == '\0') || (ch == '#')) ch = '*'; /* Protect encapsulation. */ *pkt++ = ch; } return pkt; } #endif /* 0 (unused) */ static char * unpack_string (char *src, char *dest, int length) { while (length--) *dest++ = *src++; *dest = '\0'; return src; } static char * pack_threadid (char *pkt, threadref *id) { char *limit; unsigned char *altid; altid = (unsigned char *) id; limit = pkt + BUF_THREAD_ID_SIZE; while (pkt < limit) pkt = pack_hex_byte (pkt, *altid++); return pkt; } static char * unpack_threadid (char *inbuf, threadref *id) { char *altref; char *limit = inbuf + BUF_THREAD_ID_SIZE; int x, y; altref = (char *) id; while (inbuf < limit) { x = stubhex (*inbuf++); y = stubhex (*inbuf++); *altref++ = (x << 4) | y; } return inbuf; } /* Externally, threadrefs are 64 bits but internally, they are still ints. This is due to a mismatch of specifications. We would like to use 64bit thread references internally. This is an adapter function. */ void int_to_threadref (threadref *id, int value) { unsigned char *scan; scan = (unsigned char *) id; { int i = 4; while (i--) *scan++ = 0; } *scan++ = (value >> 24) & 0xff; *scan++ = (value >> 16) & 0xff; *scan++ = (value >> 8) & 0xff; *scan++ = (value & 0xff); } static int threadref_to_int (threadref *ref) { int i, value = 0; unsigned char *scan; scan = *ref; scan += 4; i = 4; while (i-- > 0) value = (value << 8) | ((*scan++) & 0xff); return value; } static void copy_threadref (threadref *dest, threadref *src) { int i; unsigned char *csrc, *cdest; csrc = (unsigned char *) src; cdest = (unsigned char *) dest; i = 8; while (i--) *cdest++ = *csrc++; } static int threadmatch (threadref *dest, threadref *src) { /* Things are broken right now, so just assume we got a match. */ #if 0 unsigned char *srcp, *destp; int i, result; srcp = (char *) src; destp = (char *) dest; result = 1; while (i-- > 0) result &= (*srcp++ == *destp++) ? 1 : 0; return result; #endif return 1; } /* threadid:1, # always request threadid context_exists:2, display:4, unique_name:8, more_display:16 */ /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */ static char * pack_threadinfo_request (char *pkt, int mode, threadref *id) { *pkt++ = 'q'; /* Info Query */ *pkt++ = 'P'; /* process or thread info */ pkt = pack_int (pkt, mode); /* mode */ pkt = pack_threadid (pkt, id); /* threadid */ *pkt = '\0'; /* terminate */ return pkt; } /* These values tag the fields in a thread info response packet. */ /* Tagging the fields allows us to request specific fields and to add more fields as time goes by. */ #define TAG_THREADID 1 /* Echo the thread identifier. */ #define TAG_EXISTS 2 /* Is this process defined enough to fetch registers and its stack? */ #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */ #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */ #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about the process. */ static int remote_unpack_thread_info_response (char *pkt, threadref *expectedref, struct gdb_ext_thread_info *info) { struct remote_state *rs = get_remote_state (); int mask, length; int tag; threadref ref; char *limit = pkt + rs->buf_size; /* Plausible parsing limit. */ int retval = 1; /* info->threadid = 0; FIXME: implement zero_threadref. */ info->active = 0; info->display[0] = '\0'; info->shortname[0] = '\0'; info->more_display[0] = '\0'; /* Assume the characters indicating the packet type have been stripped. */ pkt = unpack_int (pkt, &mask); /* arg mask */ pkt = unpack_threadid (pkt, &ref); if (mask == 0) warning (_("Incomplete response to threadinfo request.")); if (!threadmatch (&ref, expectedref)) { /* This is an answer to a different request. */ warning (_("ERROR RMT Thread info mismatch.")); return 0; } copy_threadref (&info->threadid, &ref); /* Loop on tagged fields , try to bail if somthing goes wrong. */ /* Packets are terminated with nulls. */ while ((pkt < limit) && mask && *pkt) { pkt = unpack_int (pkt, &tag); /* tag */ pkt = unpack_byte (pkt, &length); /* length */ if (!(tag & mask)) /* Tags out of synch with mask. */ { warning (_("ERROR RMT: threadinfo tag mismatch.")); retval = 0; break; } if (tag == TAG_THREADID) { if (length != 16) { warning (_("ERROR RMT: length of threadid is not 16.")); retval = 0; break; } pkt = unpack_threadid (pkt, &ref); mask = mask & ~TAG_THREADID; continue; } if (tag == TAG_EXISTS) { info->active = stub_unpack_int (pkt, length); pkt += length; mask = mask & ~(TAG_EXISTS); if (length > 8) { warning (_("ERROR RMT: 'exists' length too long.")); retval = 0; break; } continue; } if (tag == TAG_THREADNAME) { pkt = unpack_string (pkt, &info->shortname[0], length); mask = mask & ~TAG_THREADNAME; continue; } if (tag == TAG_DISPLAY) { pkt = unpack_string (pkt, &info->display[0], length); mask = mask & ~TAG_DISPLAY; continue; } if (tag == TAG_MOREDISPLAY) { pkt = unpack_string (pkt, &info->more_display[0], length); mask = mask & ~TAG_MOREDISPLAY; continue; } warning (_("ERROR RMT: unknown thread info tag.")); break; /* Not a tag we know about. */ } return retval; } static int remote_get_threadinfo (threadref *threadid, int fieldset, /* TAG mask */ struct gdb_ext_thread_info *info) { struct remote_state *rs = get_remote_state (); int result; pack_threadinfo_request (rs->buf, fieldset, threadid); putpkt (rs->buf); getpkt (&rs->buf, &rs->buf_size, 0); result = remote_unpack_thread_info_response (rs->buf + 2, threadid, info); return result; } /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */ static char * pack_threadlist_request (char *pkt, int startflag, int threadcount, threadref *nextthread) { *pkt++ = 'q'; /* info query packet */ *pkt++ = 'L'; /* Process LIST or threadLIST request */ pkt = pack_nibble (pkt, startflag); /* initflag 1 bytes */ pkt = pack_hex_byte (pkt, threadcount); /* threadcount 2 bytes */ pkt = pack_threadid (pkt, nextthread); /* 64 bit thread identifier */ *pkt = '\0'; return pkt; } /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */ static int parse_threadlist_response (char *pkt, int result_limit, threadref *original_echo, threadref *resultlist, int *doneflag) { struct remote_state *rs = get_remote_state (); char *limit; int count, resultcount, done; resultcount = 0; /* Assume the 'q' and 'M chars have been stripped. */ limit = pkt + (rs->buf_size - BUF_THREAD_ID_SIZE); /* done parse past here */ pkt = unpack_byte (pkt, &count); /* count field */ pkt = unpack_nibble (pkt, &done); /* The first threadid is the argument threadid. */ pkt = unpack_threadid (pkt, original_echo); /* should match query packet */ while ((count-- > 0) && (pkt < limit)) { pkt = unpack_threadid (pkt, resultlist++); if (resultcount++ >= result_limit) break; } if (doneflag) *doneflag = done; return resultcount; } static int remote_get_threadlist (int startflag, threadref *nextthread, int result_limit, int *done, int *result_count, threadref *threadlist) { struct remote_state *rs = get_remote_state (); static threadref echo_nextthread; int result = 1; /* Trancate result limit to be smaller than the packet size. */ if ((((result_limit + 1) * BUF_THREAD_ID_SIZE) + 10) >= get_remote_packet_size ()) result_limit = (get_remote_packet_size () / BUF_THREAD_ID_SIZE) - 2; pack_threadlist_request (rs->buf, startflag, result_limit, nextthread); putpkt (rs->buf); getpkt (&rs->buf, &rs->buf_size, 0); if (*rs->buf == '\0') *result_count = 0; else *result_count = parse_threadlist_response (rs->buf + 2, result_limit, &echo_nextthread, threadlist, done); if (!threadmatch (&echo_nextthread, nextthread)) { /* FIXME: This is a good reason to drop the packet. */ /* Possably, there is a duplicate response. */ /* Possabilities : retransmit immediatly - race conditions retransmit after timeout - yes exit wait for packet, then exit */ warning (_("HMM: threadlist did not echo arg thread, dropping it.")); return 0; /* I choose simply exiting. */ } if (*result_count <= 0) { if (*done != 1) { warning (_("RMT ERROR : failed to get remote thread list.")); result = 0; } return result; /* break; */ } if (*result_count > result_limit) { *result_count = 0; warning (_("RMT ERROR: threadlist response longer than requested.")); return 0; } return result; } /* This is the interface between remote and threads, remotes upper interface. */ /* remote_find_new_threads retrieves the thread list and for each thread in the list, looks up the thread in GDB's internal list, ading the thread if it does not already exist. This involves getting partial thread lists from the remote target so, polling the quit_flag is required. */ /* About this many threadisds fit in a packet. */ #define MAXTHREADLISTRESULTS 32 static int remote_threadlist_iterator (rmt_thread_action stepfunction, void *context, int looplimit) { int done, i, result_count; int startflag = 1; int result = 1; int loopcount = 0; static threadref nextthread; static threadref resultthreadlist[MAXTHREADLISTRESULTS]; done = 0; while (!done) { if (loopcount++ > looplimit) { result = 0; warning (_("Remote fetch threadlist -infinite loop-.")); break; } if (!remote_get_threadlist (startflag, &nextthread, MAXTHREADLISTRESULTS, &done, &result_count, resultthreadlist)) { result = 0; break; } /* Clear for later iterations. */ startflag = 0; /* Setup to resume next batch of thread references, set nextthread. */ if (result_count >= 1) copy_threadref (&nextthread, &resultthreadlist[result_count - 1]); i = 0; while (result_count--) if (!(result = (*stepfunction) (&resultthreadlist[i++], context))) break; } return result; } static int remote_newthread_step (threadref *ref, void *context) { ptid_t ptid; ptid = pid_to_ptid (threadref_to_int (ref)); if (!in_thread_list (ptid)) add_thread (ptid); return 1; /* continue iterator */ } #define CRAZY_MAX_THREADS 1000 static ptid_t remote_current_thread (ptid_t oldpid) { struct remote_state *rs = get_remote_state (); putpkt ("qC"); getpkt (&rs->buf, &rs->buf_size, 0); if (rs->buf[0] == 'Q' && rs->buf[1] == 'C') /* Use strtoul here, so we'll correctly parse values whose highest bit is set. The protocol carries them as a simple series of hex digits; in the absence of a sign, strtol will see such values as positive numbers out of range for signed 'long', and return LONG_MAX to indicate an overflow. */ return pid_to_ptid (strtoul (&rs->buf[2], NULL, 16)); else return oldpid; } /* Find new threads for info threads command. * Original version, using John Metzler's thread protocol. */ static void remote_find_new_threads (void) { remote_threadlist_iterator (remote_newthread_step, 0, CRAZY_MAX_THREADS); if (PIDGET (inferior_ptid) == MAGIC_NULL_PID) /* ack ack ack */ inferior_ptid = remote_current_thread (inferior_ptid); } /* * Find all threads for info threads command. * Uses new thread protocol contributed by Cisco. * Falls back and attempts to use the older method (above) * if the target doesn't respond to the new method. */ static void remote_threads_info (void) { struct remote_state *rs = get_remote_state (); char *bufp; int tid; if (remote_desc == 0) /* paranoia */ error (_("Command can only be used when connected to the remote target.")); if (use_threadinfo_query) { putpkt ("qfThreadInfo"); getpkt (&rs->buf, &rs->buf_size, 0); bufp = rs->buf; if (bufp[0] != '\0') /* q packet recognized */ { while (*bufp++ == 'm') /* reply contains one or more TID */ { do { /* Use strtoul here, so we'll correctly parse values whose highest bit is set. The protocol carries them as a simple series of hex digits; in the absence of a sign, strtol will see such values as positive numbers out of range for signed 'long', and return LONG_MAX to indicate an overflow. */ tid = strtoul (bufp, &bufp, 16); if (tid != 0 && !in_thread_list (pid_to_ptid (tid))) add_thread (pid_to_ptid (tid)); } while (*bufp++ == ','); /* comma-separated list */ putpkt ("qsThreadInfo"); getpkt (&rs->buf, &rs->buf_size, 0); bufp = rs->buf; } return; /* done */ } } /* Else fall back to old method based on jmetzler protocol. */ use_threadinfo_query = 0; remote_find_new_threads (); return; } /* * Collect a descriptive string about the given thread. * The target may say anything it wants to about the thread * (typically info about its blocked / runnable state, name, etc.). * This string will appear in the info threads display. * * Optional: targets are not required to implement this function. */ static char * remote_threads_extra_info (struct thread_info *tp) { struct remote_state *rs = get_remote_state (); int result; int set; threadref id; struct gdb_ext_thread_info threadinfo; static char display_buf[100]; /* arbitrary... */ int n = 0; /* position in display_buf */ if (remote_desc == 0) /* paranoia */ internal_error (__FILE__, __LINE__, _("remote_threads_extra_info")); if (use_threadextra_query) { xsnprintf (rs->buf, get_remote_packet_size (), "qThreadExtraInfo,%x", PIDGET (tp->ptid)); putpkt (rs->buf); getpkt (&rs->buf, &rs->buf_size, 0); if (rs->buf[0] != 0) { n = min (strlen (rs->buf) / 2, sizeof (display_buf)); result = hex2bin (rs->buf, (gdb_byte *) display_buf, n); display_buf [result] = '\0'; return display_buf; } } /* If the above query fails, fall back to the old method. */ use_threadextra_query = 0; set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME | TAG_MOREDISPLAY | TAG_DISPLAY; int_to_threadref (&id, PIDGET (tp->ptid)); if (remote_get_threadinfo (&id, set, &threadinfo)) if (threadinfo.active) { if (*threadinfo.shortname) n += xsnprintf (&display_buf[0], sizeof (display_buf) - n, " Name: %s,", threadinfo.shortname); if (*threadinfo.display) n += xsnprintf (&display_buf[n], sizeof (display_buf) - n, " State: %s,", threadinfo.display); if (*threadinfo.more_display) n += xsnprintf (&display_buf[n], sizeof (display_buf) - n, " Priority: %s", threadinfo.more_display); if (n > 0) { /* For purely cosmetic reasons, clear up trailing commas. */ if (',' == display_buf[n-1]) display_buf[n-1] = ' '; return display_buf; } } return NULL; } /* Restart the remote side; this is an extended protocol operation. */ static void extended_remote_restart (void) { struct remote_state *rs = get_remote_state (); /* Send the restart command; for reasons I don't understand the remote side really expects a number after the "R". */ xsnprintf (rs->buf, get_remote_packet_size (), "R%x", 0); putpkt (rs->buf); remote_fileio_reset (); } /* Clean up connection to a remote debugger. */ static void remote_close (int quitting) { if (remote_desc) serial_close (remote_desc); remote_desc = NULL; } /* Query the remote side for the text, data and bss offsets. */ static void get_offsets (void) { struct remote_state *rs = get_remote_state (); char *buf; char *ptr; int lose, num_segments = 0, do_sections, do_segments; CORE_ADDR text_addr, data_addr, bss_addr, segments[2]; struct section_offsets *offs; struct symfile_segment_data *data; if (symfile_objfile == NULL) return; putpkt ("qOffsets"); getpkt (&rs->buf, &rs->buf_size, 0); buf = rs->buf; if (buf[0] == '\000') return; /* Return silently. Stub doesn't support this command. */ if (buf[0] == 'E') { warning (_("Remote failure reply: %s"), buf); return; } /* Pick up each field in turn. This used to be done with scanf, but scanf will make trouble if CORE_ADDR size doesn't match conversion directives correctly. The following code will work with any size of CORE_ADDR. */ text_addr = data_addr = bss_addr = 0; ptr = buf; lose = 0; if (strncmp (ptr, "Text=", 5) == 0) { ptr += 5; /* Don't use strtol, could lose on big values. */ while (*ptr && *ptr != ';') text_addr = (text_addr << 4) + fromhex (*ptr++); if (strncmp (ptr, ";Data=", 6) == 0) { ptr += 6; while (*ptr && *ptr != ';') data_addr = (data_addr << 4) + fromhex (*ptr++); } else lose = 1; if (!lose && strncmp (ptr, ";Bss=", 5) == 0) { ptr += 5; while (*ptr && *ptr != ';') bss_addr = (bss_addr << 4) + fromhex (*ptr++); if (bss_addr != data_addr) warning (_("Target reported unsupported offsets: %s"), buf); } else lose = 1; } else if (strncmp (ptr, "TextSeg=", 8) == 0) { ptr += 8; /* Don't use strtol, could lose on big values. */ while (*ptr && *ptr != ';') text_addr = (text_addr << 4) + fromhex (*ptr++); num_segments = 1; if (strncmp (ptr, ";DataSeg=", 9) == 0) { ptr += 9; while (*ptr && *ptr != ';') data_addr = (data_addr << 4) + fromhex (*ptr++); num_segments++; } } else lose = 1; if (lose) error (_("Malformed response to offset query, %s"), buf); else if (*ptr != '\0') warning (_("Target reported unsupported offsets: %s"), buf); offs = ((struct section_offsets *) alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections))); memcpy (offs, symfile_objfile->section_offsets, SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections)); data = get_symfile_segment_data (symfile_objfile->obfd); do_segments = (data != NULL); do_sections = num_segments == 0; if (num_segments > 0) { segments[0] = text_addr; segments[1] = data_addr; } /* If we have two segments, we can still try to relocate everything by assuming that the .text and .data offsets apply to the whole text and data segments. Convert the offsets given in the packet to base addresses for symfile_map_offsets_to_segments. */ else if (data && data->num_segments == 2) { segments[0] = data->segment_bases[0] + text_addr; segments[1] = data->segment_bases[1] + data_addr; num_segments = 2; } /* There's no way to relocate by segment. */ else do_segments = 0; if (do_segments) { int ret = symfile_map_offsets_to_segments (symfile_objfile->obfd, data, offs, num_segments, segments); if (ret == 0 && !do_sections) error (_("Can not handle qOffsets TextSeg response with this symbol file")); if (ret > 0) do_sections = 0; } if (data) free_symfile_segment_data (data); if (do_sections) { offs->offsets[SECT_OFF_TEXT (symfile_objfile)] = text_addr; /* This is a temporary kludge to force data and bss to use the same offsets because that's what nlmconv does now. The real solution requires changes to the stub and remote.c that I don't have time to do right now. */ offs->offsets[SECT_OFF_DATA (symfile_objfile)] = data_addr; offs->offsets[SECT_OFF_BSS (symfile_objfile)] = data_addr; } objfile_relocate (symfile_objfile, offs); } /* Stub for catch_exception. */ struct start_remote_args { int from_tty; /* The current target. */ struct target_ops *target; /* Non-zero if this is an extended-remote target. */ int extended_p; }; static void remote_start_remote (struct ui_out *uiout, void *opaque) { struct remote_state *rs = get_remote_state (); struct start_remote_args *args = opaque; char *wait_status = NULL; immediate_quit++; /* Allow user to interrupt it. */ /* Ack any packet which the remote side has already sent. */ serial_write (remote_desc, "+", 1); /* Check whether the target is running now. */ putpkt ("?"); getpkt (&rs->buf, &rs->buf_size, 0); if (rs->buf[0] == 'W' || rs->buf[0] == 'X') { if (args->extended_p) { /* We're connected, but not running. Drop out before we call start_remote. */ target_mark_exited (args->target); return; } else error (_("The target is not running (try extended-remote?)")); } else { if (args->extended_p) target_mark_running (args->target); /* Save the reply for later. */ wait_status = alloca (strlen (rs->buf) + 1); strcpy (wait_status, rs->buf); } /* Let the stub know that we want it to return the thread. */ set_thread (-1, 0); /* Without this, some commands which require an active target (such as kill) won't work. This variable serves (at least) double duty as both the pid of the target process (if it has such), and as a flag indicating that a target is active. These functions should be split out into seperate variables, especially since GDB will someday have a notion of debugging several processes. */ inferior_ptid = pid_to_ptid (MAGIC_NULL_PID); /* Now, if we have thread information, update inferior_ptid. */ inferior_ptid = remote_current_thread (inferior_ptid); get_offsets (); /* Get text, data & bss offsets. */ /* Use the previously fetched status. */ gdb_assert (wait_status != NULL); strcpy (rs->buf, wait_status); rs->cached_wait_status = 1; immediate_quit--; start_remote (args->from_tty); /* Initialize gdb process mechanisms. */ } /* Open a connection to a remote debugger. NAME is the filename used for communication. */ static void remote_open (char *name, int from_tty) { remote_open_1 (name, from_tty, &remote_ops, 0, 0); } /* Just like remote_open, but with asynchronous support. */ static void remote_async_open (char *name, int from_tty) { remote_open_1 (name, from_tty, &remote_async_ops, 0, 1); } /* Open a connection to a remote debugger using the extended remote gdb protocol. NAME is the filename used for communication. */ static void extended_remote_open (char *name, int from_tty) { remote_open_1 (name, from_tty, &extended_remote_ops, 1 /*extended_p */, 0 /* async_p */); } /* Just like extended_remote_open, but with asynchronous support. */ static void extended_remote_async_open (char *name, int from_tty) { remote_open_1 (name, from_tty, &extended_async_remote_ops, 1 /*extended_p */, 1 /* async_p */); } /* Generic code for opening a connection to a remote target. */ static void init_all_packet_configs (void) { int i; for (i = 0; i < PACKET_MAX; i++) update_packet_config (&remote_protocol_packets[i]); } /* Symbol look-up. */ static void remote_check_symbols (struct objfile *objfile) { struct remote_state *rs = get_remote_state (); char *msg, *reply, *tmp; struct minimal_symbol *sym; int end; if (remote_protocol_packets[PACKET_qSymbol].support == PACKET_DISABLE) return; /* Allocate a message buffer. We can't reuse the input buffer in RS, because we need both at the same time. */ msg = alloca (get_remote_packet_size ()); /* Invite target to request symbol lookups. */ putpkt ("qSymbol::"); getpkt (&rs->buf, &rs->buf_size, 0); packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSymbol]); reply = rs->buf; while (strncmp (reply, "qSymbol:", 8) == 0) { tmp = &reply[8]; end = hex2bin (tmp, (gdb_byte *) msg, strlen (tmp) / 2); msg[end] = '\0'; sym = lookup_minimal_symbol (msg, NULL, NULL); if (sym == NULL) xsnprintf (msg, get_remote_packet_size (), "qSymbol::%s", &reply[8]); else { CORE_ADDR sym_addr = SYMBOL_VALUE_ADDRESS (sym); /* If this is a function address, return the start of code instead of any data function descriptor. */ sym_addr = gdbarch_convert_from_func_ptr_addr (current_gdbarch, sym_addr, ¤t_target); xsnprintf (msg, get_remote_packet_size (), "qSymbol:%s:%s", paddr_nz (sym_addr), &reply[8]); } putpkt (msg); getpkt (&rs->buf, &rs->buf_size, 0); reply = rs->buf; } } static struct serial * remote_serial_open (char *name) { static int udp_warning = 0; /* FIXME: Parsing NAME here is a hack. But we want to warn here instead of in ser-tcp.c, because it is the remote protocol assuming that the serial connection is reliable and not the serial connection promising to be. */ if (!udp_warning && strncmp (name, "udp:", 4) == 0) { warning (_("\ The remote protocol may be unreliable over UDP.\n\ Some events may be lost, rendering further debugging impossible.")); udp_warning = 1; } return serial_open (name); } /* This type describes each known response to the qSupported packet. */ struct protocol_feature { /* The name of this protocol feature. */ const char *name; /* The default for this protocol feature. */ enum packet_support default_support; /* The function to call when this feature is reported, or after qSupported processing if the feature is not supported. The first argument points to this structure. The second argument indicates whether the packet requested support be enabled, disabled, or probed (or the default, if this function is being called at the end of processing and this feature was not reported). The third argument may be NULL; if not NULL, it is a NUL-terminated string taken from the packet following this feature's name and an equals sign. */ void (*func) (const struct protocol_feature *, enum packet_support, const char *); /* The corresponding packet for this feature. Only used if FUNC is remote_supported_packet. */ int packet; }; static void remote_supported_packet (const struct protocol_feature *feature, enum packet_support support, const char *argument) { if (argument) { warning (_("Remote qSupported response supplied an unexpected value for" " \"%s\"."), feature->name); return; } if (remote_protocol_packets[feature->packet].support == PACKET_SUPPORT_UNKNOWN) remote_protocol_packets[feature->packet].support = support; } static void remote_packet_size (const struct protocol_feature *feature, enum packet_support support, const char *value) { struct remote_state *rs = get_remote_state (); int packet_size; char *value_end; if (support != PACKET_ENABLE) return; if (value == NULL || *value == '\0') { warning (_("Remote target reported \"%s\" without a size."), feature->name); return; } errno = 0; packet_size = strtol (value, &value_end, 16); if (errno != 0 || *value_end != '\0' || packet_size < 0) { warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."), feature->name, value); return; } if (packet_size > MAX_REMOTE_PACKET_SIZE) { warning (_("limiting remote suggested packet size (%d bytes) to %d"), packet_size, MAX_REMOTE_PACKET_SIZE); packet_size = MAX_REMOTE_PACKET_SIZE; } /* Record the new maximum packet size. */ rs->explicit_packet_size = packet_size; } static struct protocol_feature remote_protocol_features[] = { { "PacketSize", PACKET_DISABLE, remote_packet_size, -1 }, { "qXfer:auxv:read", PACKET_DISABLE, remote_supported_packet, PACKET_qXfer_auxv }, { "qXfer:features:read", PACKET_DISABLE, remote_supported_packet, PACKET_qXfer_features }, { "qXfer:libraries:read", PACKET_DISABLE, remote_supported_packet, PACKET_qXfer_libraries }, { "qXfer:memory-map:read", PACKET_DISABLE, remote_supported_packet, PACKET_qXfer_memory_map }, { "qXfer:spu:read", PACKET_DISABLE, remote_supported_packet, PACKET_qXfer_spu_read }, { "qXfer:spu:write", PACKET_DISABLE, remote_supported_packet, PACKET_qXfer_spu_write }, { "QPassSignals", PACKET_DISABLE, remote_supported_packet, PACKET_QPassSignals }, }; static void remote_query_supported (void) { struct remote_state *rs = get_remote_state (); char *next; int i; unsigned char seen [ARRAY_SIZE (remote_protocol_features)]; /* The packet support flags are handled differently for this packet than for most others. We treat an error, a disabled packet, and an empty response identically: any features which must be reported to be used will be automatically disabled. An empty buffer accomplishes this, since that is also the representation for a list containing no features. */ rs->buf[0] = 0; if (remote_protocol_packets[PACKET_qSupported].support != PACKET_DISABLE) { putpkt ("qSupported"); getpkt (&rs->buf, &rs->buf_size, 0); /* If an error occured, warn, but do not return - just reset the buffer to empty and go on to disable features. */ if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSupported]) == PACKET_ERROR) { warning (_("Remote failure reply: %s"), rs->buf); rs->buf[0] = 0; } } memset (seen, 0, sizeof (seen)); next = rs->buf; while (*next) { enum packet_support is_supported; char *p, *end, *name_end, *value; /* First separate out this item from the rest of the packet. If there's another item after this, we overwrite the separator (terminated strings are much easier to work with). */ p = next; end = strchr (p, ';'); if (end == NULL) { end = p + strlen (p); next = end; } else { *end = '\0'; next = end + 1; if (end == p) { warning (_("empty item in \"qSupported\" response")); continue; } } name_end = strchr (p, '='); if (name_end) { /* This is a name=value entry. */ is_supported = PACKET_ENABLE; value = name_end + 1; *name_end = '\0'; } else { value = NULL; switch (end[-1]) { case '+': is_supported = PACKET_ENABLE; break; case '-': is_supported = PACKET_DISABLE; break; case '?': is_supported = PACKET_SUPPORT_UNKNOWN; break; default: warning (_("unrecognized item \"%s\" in \"qSupported\" response"), p); continue; } end[-1] = '\0'; } for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++) if (strcmp (remote_protocol_features[i].name, p) == 0) { const struct protocol_feature *feature; seen[i] = 1; feature = &remote_protocol_features[i]; feature->func (feature, is_supported, value); break; } } /* If we increased the packet size, make sure to increase the global buffer size also. We delay this until after parsing the entire qSupported packet, because this is the same buffer we were parsing. */ if (rs->buf_size < rs->explicit_packet_size) { rs->buf_size = rs->explicit_packet_size; rs->buf = xrealloc (rs->buf, rs->buf_size); } /* Handle the defaults for unmentioned features. */ for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++) if (!seen[i]) { const struct protocol_feature *feature; feature = &remote_protocol_features[i]; feature->func (feature, feature->default_support, NULL); } } static void remote_open_1 (char *name, int from_tty, struct target_ops *target, int extended_p, int async_p) { struct remote_state *rs = get_remote_state (); if (name == 0) error (_("To open a remote debug connection, you need to specify what\n" "serial device is attached to the remote system\n" "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).")); /* See FIXME above. */ if (!async_p) wait_forever_enabled_p = 1; /* If we're connected to a running target, target_preopen will kill it. But if we're connected to a target system with no running process, then we will still be connected when it returns. Ask this question first, before target_preopen has a chance to kill anything. */ if (remote_desc != NULL && !target_has_execution) { if (!from_tty || query (_("Already connected to a remote target. Disconnect? "))) pop_target (); else error (_("Still connected.")); } target_preopen (from_tty); unpush_target (target); /* This time without a query. If we were connected to an extended-remote target and target_preopen killed the running process, we may still be connected. If we are starting "target remote" now, the extended-remote target will not have been removed by unpush_target. */ if (remote_desc != NULL && !target_has_execution) pop_target (); /* Make sure we send the passed signals list the next time we resume. */ xfree (last_pass_packet); last_pass_packet = NULL; remote_fileio_reset (); reopen_exec_file (); reread_symbols (); remote_desc = remote_serial_open (name); if (!remote_desc) perror_with_name (name); if (baud_rate != -1) { if (serial_setbaudrate (remote_desc, baud_rate)) { /* The requested speed could not be set. Error out to top level after closing remote_desc. Take care to set remote_desc to NULL to avoid closing remote_desc more than once. */ serial_close (remote_desc); remote_desc = NULL; perror_with_name (name); } } serial_raw (remote_desc); /* If there is something sitting in the buffer we might take it as a response to a command, which would be bad. */ serial_flush_input (remote_desc); if (from_tty) { puts_filtered ("Remote debugging using "); puts_filtered (name); puts_filtered ("\n"); } push_target (target); /* Switch to using remote target now. */ /* Assume that the target is running, unless we learn otherwise. */ target_mark_running (target); /* Reset the target state; these things will be queried either by remote_query_supported or as they are needed. */ init_all_packet_configs (); rs->explicit_packet_size = 0; general_thread = -2; continue_thread = -2; /* Probe for ability to use "ThreadInfo" query, as required. */ use_threadinfo_query = 1; use_threadextra_query = 1; /* The first packet we send to the target is the optional "supported packets" request. If the target can answer this, it will tell us which later probes to skip. */ remote_query_supported (); /* Next, if the target can specify a description, read it. We do this before anything involving memory or registers. */ target_find_description (); if (async_p) { /* With this target we start out by owning the terminal. */ remote_async_terminal_ours_p = 1; /* FIXME: cagney/1999-09-23: During the initial connection it is assumed that the target is already ready and able to respond to requests. Unfortunately remote_start_remote() eventually calls wait_for_inferior() with no timeout. wait_forever_enabled_p gets around this. Eventually a mechanism that allows wait_for_inferior() to expect/get timeouts will be implemented. */ wait_forever_enabled_p = 0; } /* First delete any symbols previously loaded from shared libraries. */ no_shared_libraries (NULL, 0); /* Start the remote connection. If error() or QUIT, discard this target (we'd otherwise be in an inconsistent state) and then propogate the error on up the exception chain. This ensures that the caller doesn't stumble along blindly assuming that the function succeeded. The CLI doesn't have this problem but other UI's, such as MI do. FIXME: cagney/2002-05-19: Instead of re-throwing the exception, this function should return an error indication letting the caller restore the previous state. Unfortunately the command ``target remote'' is directly wired to this function making that impossible. On a positive note, the CLI side of this problem has been fixed - the function set_cmd_context() makes it possible for all the ``target ....'' commands to share a common callback function. See cli-dump.c. */ { struct gdb_exception ex; struct start_remote_args args; args.from_tty = from_tty; args.target = target; args.extended_p = extended_p; ex = catch_exception (uiout, remote_start_remote, &args, RETURN_MASK_ALL); if (ex.reason < 0) { pop_target (); if (async_p) wait_forever_enabled_p = 1; throw_exception (ex); } } if (async_p) wait_forever_enabled_p = 1; if (extended_p) { /* Tell the remote that we are using the extended protocol. */ putpkt ("!"); getpkt (&rs->buf, &rs->buf_size, 0); } /* If we connected to a live target, do some additional setup. */ if (target_has_execution) { if (exec_bfd) /* No use without an exec file. */ remote_check_symbols (symfile_objfile); } } /* This takes a program previously attached to and detaches it. After this is done, GDB can be used to debug some other program. We better not have left any breakpoints in the target program or it'll die when it hits one. */ static void remote_detach_1 (char *args, int from_tty, int extended) { struct remote_state *rs = get_remote_state (); if (args) error (_("Argument given to \"detach\" when remotely debugging.")); if (!target_has_execution) error (_("No process to detach from.")); /* Tell the remote target to detach. */ strcpy (rs->buf, "D"); putpkt (rs->buf); getpkt (&rs->buf, &rs->buf_size, 0); if (rs->buf[0] == 'E') error (_("Can't detach process.")); /* Unregister the file descriptor from the event loop. */ if (target_is_async_p ()) serial_async (remote_desc, NULL, 0); target_mourn_inferior (); if (from_tty) { if (extended) puts_filtered ("Detached from remote process.\n"); else puts_filtered ("Ending remote debugging.\n"); } } static void remote_detach (char *args, int from_tty) { remote_detach_1 (args, from_tty, 0); } static void extended_remote_detach (char *args, int from_tty) { remote_detach_1 (args, from_tty, 1); } /* Same as remote_detach, but don't send the "D" packet; just disconnect. */ static void remote_disconnect (struct target_ops *target, char *args, int from_tty) { if (args) error (_("Argument given to \"disconnect\" when remotely debugging.")); /* Unregister the file descriptor from the event loop. */ if (target_is_async_p ()) serial_async (remote_desc, NULL, 0); /* Make sure we unpush even the extended remote targets; mourn won't do it. So call remote_mourn_1 directly instead of target_mourn_inferior. */ remote_mourn_1 (target); if (from_tty) puts_filtered ("Ending remote debugging.\n"); } /* Attach to the process specified by ARGS. If FROM_TTY is non-zero, be chatty about it. */ static void extended_remote_attach_1 (struct target_ops *target, char *args, int from_tty) { struct remote_state *rs = get_remote_state (); pid_t pid; char *dummy; if (!args) error_no_arg (_("process-id to attach")); dummy = args; pid = strtol (args, &dummy, 0); /* Some targets don't set errno on errors, grrr! */ if (pid == 0 && args == dummy) error (_("Illegal process-id: %s."), args); if (remote_protocol_packets[PACKET_vAttach].support == PACKET_DISABLE) error (_("This target does not support attaching to a process")); sprintf (rs->buf, "vAttach;%x", pid); putpkt (rs->buf); getpkt (&rs->buf, &rs->buf_size, 0); if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vAttach]) == PACKET_OK) { if (from_tty) printf_unfiltered (_("Attached to %s\n"), target_pid_to_str (pid_to_ptid (pid))); /* We have a wait response; reuse it. */ rs->cached_wait_status = 1; } else if (remote_protocol_packets[PACKET_vAttach].support == PACKET_DISABLE) error (_("This target does not support attaching to a process")); else error (_("Attaching to %s failed"), target_pid_to_str (pid_to_ptid (pid))); target_mark_running (target); inferior_ptid = pid_to_ptid (pid); attach_flag = 1; } static void extended_remote_attach (char *args, int from_tty) { extended_remote_attach_1 (&extended_remote_ops, args, from_tty); } static void extended_async_remote_attach (char *args, int from_tty) { extended_remote_attach_1 (&extended_async_remote_ops, args, from_tty); } /* Convert hex digit A to a number. */ static int fromhex (int a) { if (a >= '0' && a <= '9') return a - '0'; else if (a >= 'a' && a <= 'f') return a - 'a' + 10; else if (a >= 'A' && a <= 'F') return a - 'A' + 10; else error (_("Reply contains invalid hex digit %d"), a); } static int hex2bin (const char *hex, gdb_byte *bin, int count) { int i; for (i = 0; i < count; i++) { if (hex[0] == 0 || hex[1] == 0) { /* Hex string is short, or of uneven length. Return the count that has been converted so far. */ return i; } *bin++ = fromhex (hex[0]) * 16 + fromhex (hex[1]); hex += 2; } return i; } /* Convert number NIB to a hex digit. */ static int tohex (int nib) { if (nib < 10) return '0' + nib; else return 'a' + nib - 10; } static int bin2hex (const gdb_byte *bin, char *hex, int count) { int i; /* May use a length, or a nul-terminated string as input. */ if (count == 0) count = strlen ((char *) bin); for (i = 0; i < count; i++) { *hex++ = tohex ((*bin >> 4) & 0xf); *hex++ = tohex (*bin++ & 0xf); } *hex = 0; return i; } /* Check for the availability of vCont. This function should also check the response. */ static void remote_vcont_probe (struct remote_state *rs) { char *buf; strcpy (rs->buf, "vCont?"); putpkt (rs->buf); getpkt (&rs->buf, &rs->buf_size, 0); buf = rs->buf; /* Make sure that the features we assume are supported. */ if (strncmp (buf, "vCont", 5) == 0) { char *p = &buf[5]; int support_s, support_S, support_c, support_C; support_s = 0; support_S = 0; support_c = 0; support_C = 0; while (p && *p == ';') { p++; if (*p == 's' && (*(p + 1) == ';' || *(p + 1) == 0)) support_s = 1; else if (*p == 'S' && (*(p + 1) == ';' || *(p + 1) == 0)) support_S = 1; else if (*p == 'c' && (*(p + 1) == ';' || *(p + 1) == 0)) support_c = 1; else if (*p == 'C' && (*(p + 1) == ';' || *(p + 1) == 0)) support_C = 1; p = strchr (p, ';'); } /* If s, S, c, and C are not all supported, we can't use vCont. Clearing BUF will make packet_ok disable the packet. */ if (!support_s || !support_S || !support_c || !support_C) buf[0] = 0; } packet_ok (buf, &remote_protocol_packets[PACKET_vCont]); } /* Resume the remote inferior by using a "vCont" packet. The thread to be resumed is PTID; STEP and SIGGNAL indicate whether the resumed thread should be single-stepped and/or signalled. If PTID's PID is -1, then all threads are resumed; the thread to be stepped and/or signalled is given in the global INFERIOR_PTID. This function returns non-zero iff it resumes the inferior. This function issues a strict subset of all possible vCont commands at the moment. */ static int remote_vcont_resume (ptid_t ptid, int step, enum target_signal siggnal) { struct remote_state *rs = get_remote_state (); int pid = PIDGET (ptid); char *outbuf; struct cleanup *old_cleanup; if (remote_protocol_packets[PACKET_vCont].support == PACKET_SUPPORT_UNKNOWN) remote_vcont_probe (rs); if (remote_protocol_packets[PACKET_vCont].support == PACKET_DISABLE) return 0; /* If we could generate a wider range of packets, we'd have to worry about overflowing BUF. Should there be a generic "multi-part-packet" packet? */ if (PIDGET (inferior_ptid) == MAGIC_NULL_PID) { /* MAGIC_NULL_PTID means that we don't have any active threads, so we don't have any PID numbers the inferior will understand. Make sure to only send forms that do not specify a PID. */ if (step && siggnal != TARGET_SIGNAL_0) outbuf = xstrprintf ("vCont;S%02x", siggnal); else if (step) outbuf = xstrprintf ("vCont;s"); else if (siggnal != TARGET_SIGNAL_0) outbuf = xstrprintf ("vCont;C%02x", siggnal); else outbuf = xstrprintf ("vCont;c"); } else if (pid == -1) { /* Resume all threads, with preference for INFERIOR_PTID. */ if (step && siggnal != TARGET_SIGNAL_0) outbuf = xstrprintf ("vCont;S%02x:%x;c", siggnal, PIDGET (inferior_ptid)); else if (step) outbuf = xstrprintf ("vCont;s:%x;c", PIDGET (inferior_ptid)); else if (siggnal != TARGET_SIGNAL_0) outbuf = xstrprintf ("vCont;C%02x:%x;c", siggnal, PIDGET (inferior_ptid)); else outbuf = xstrprintf ("vCont;c"); } else { /* Scheduler locking; resume only PTID. */ if (step && siggnal != TARGET_SIGNAL_0) outbuf = xstrprintf ("vCont;S%02x:%x", siggnal, pid); else if (step) outbuf = xstrprintf ("vCont;s:%x", pid); else if (siggnal != TARGET_SIGNAL_0) outbuf = xstrprintf ("vCont;C%02x:%x", siggnal, pid); else outbuf = xstrprintf ("vCont;c:%x", pid); } gdb_assert (outbuf && strlen (outbuf) < get_remote_packet_size ()); old_cleanup = make_cleanup (xfree, outbuf); putpkt (outbuf); do_cleanups (old_cleanup); return 1; } /* Tell the remote machine to resume. */ static enum target_signal last_sent_signal = TARGET_SIGNAL_0; static int last_sent_step; static void remote_resume (ptid_t ptid, int step, enum target_signal siggnal) { struct remote_state *rs = get_remote_state (); char *buf; int pid = PIDGET (ptid); last_sent_signal = siggnal; last_sent_step = step; /* A hook for when we need to do something at the last moment before resumption. */ if (deprecated_target_resume_hook) (*deprecated_target_resume_hook) (); /* Update the inferior on signals to silently pass, if they've changed. */ remote_pass_signals (); /* The vCont packet doesn't need to specify threads via Hc. */ if (remote_vcont_resume (ptid, step, siggnal)) return; /* All other supported resume packets do use Hc, so call set_thread. */ if (pid == -1) set_thread (0, 0); /* Run any thread. */ else set_thread (pid, 0); /* Run this thread. */ buf = rs->buf; if (siggnal != TARGET_SIGNAL_0) { buf[0] = step ? 'S' : 'C'; buf[1] = tohex (((int) siggnal >> 4) & 0xf); buf[2] = tohex (((int) siggnal) & 0xf); buf[3] = '\0'; } else strcpy (buf, step ? "s" : "c"); putpkt (buf); } /* Same as remote_resume, but with async support. */ static void remote_async_resume (ptid_t ptid, int step, enum target_signal siggnal) { remote_resume (ptid, step, siggnal); /* We are about to start executing the inferior, let's register it with the event loop. NOTE: this is the one place where all the execution commands end up. We could alternatively do this in each of the execution commands in infcmd.c. */ /* FIXME: ezannoni 1999-09-28: We may need to move this out of here into infcmd.c in order to allow inferior function calls to work NOT asynchronously. */ if (target_can_async_p ()) target_async (inferior_event_handler, 0); /* Tell the world that the target is now executing. */ /* FIXME: cagney/1999-09-23: Is it the targets responsibility to set this? Instead, should the client of target just assume (for async targets) that the target is going to start executing? Is this information already found in the continuation block? */ if (target_is_async_p ()) target_executing = 1; } /* Set up the signal handler for SIGINT, while the target is executing, ovewriting the 'regular' SIGINT signal handler. */ static void initialize_sigint_signal_handler (void) { sigint_remote_token = create_async_signal_handler (async_remote_interrupt, NULL); signal (SIGINT, handle_remote_sigint); } /* Signal handler for SIGINT, while the target is executing. */ static void handle_remote_sigint (int sig) { signal (sig, handle_remote_sigint_twice); sigint_remote_twice_token = create_async_signal_handler (async_remote_interrupt_twice, NULL); mark_async_signal_handler_wrapper (sigint_remote_token); } /* Signal handler for SIGINT, installed after SIGINT has already been sent once. It will take effect the second time that the user sends a ^C. */ static void handle_remote_sigint_twice (int sig) { signal (sig, handle_sigint); sigint_remote_twice_token = create_async_signal_handler (inferior_event_handler_wrapper, NULL); mark_async_signal_handler_wrapper (sigint_remote_twice_token); } /* Perform the real interruption of the target execution, in response to a ^C. */ static void async_remote_interrupt (gdb_client_data arg) { if (remote_debug) fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n"); target_stop (); } /* Perform interrupt, if the first attempt did not succeed. Just give up on the target alltogether. */ void async_remote_interrupt_twice (gdb_client_data arg) { if (remote_debug) fprintf_unfiltered (gdb_stdlog, "remote_interrupt_twice called\n"); /* Do something only if the target was not killed by the previous cntl-C. */ if (target_executing) { interrupt_query (); signal (SIGINT, handle_remote_sigint); } } /* Reinstall the usual SIGINT handlers, after the target has stopped. */ static void cleanup_sigint_signal_handler (void *dummy) { signal (SIGINT, handle_sigint); if (sigint_remote_twice_token) delete_async_signal_handler (&sigint_remote_twice_token); if (sigint_remote_token) delete_async_signal_handler (&sigint_remote_token); } /* Send ^C to target to halt it. Target will respond, and send us a packet. */ static void (*ofunc) (int); /* The command line interface's stop routine. This function is installed as a signal handler for SIGINT. The first time a user requests a stop, we call remote_stop to send a break or ^C. If there is no response from the target (it didn't stop when the user requested it), we ask the user if he'd like to detach from the target. */ static void remote_interrupt (int signo) { /* If this doesn't work, try more severe steps. */ signal (signo, remote_interrupt_twice); if (remote_debug) fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n"); target_stop (); } /* The user typed ^C twice. */ static void remote_interrupt_twice (int signo) { signal (signo, ofunc); interrupt_query (); signal (signo, remote_interrupt); } /* This is the generic stop called via the target vector. When a target interrupt is requested, either by the command line or the GUI, we will eventually end up here. */ static void remote_stop (void) { /* Send a break or a ^C, depending on user preference. */ if (remote_debug) fprintf_unfiltered (gdb_stdlog, "remote_stop called\n"); if (remote_break) serial_send_break (remote_desc); else serial_write (remote_desc, "\003", 1); } /* Ask the user what to do when an interrupt is received. */ static void interrupt_query (void) { target_terminal_ours (); if (query ("Interrupted while waiting for the program.\n\ Give up (and stop debugging it)? ")) { target_mourn_inferior (); deprecated_throw_reason (RETURN_QUIT); } target_terminal_inferior (); } /* Enable/disable target terminal ownership. Most targets can use terminal groups to control terminal ownership. Remote targets are different in that explicit transfer of ownership to/from GDB/target is required. */ static void remote_async_terminal_inferior (void) { /* FIXME: cagney/1999-09-27: Shouldn't need to test for sync_execution here. This function should only be called when GDB is resuming the inferior in the forground. A background resume (``run&'') should leave GDB in control of the terminal and consequently should not call this code. */ if (!sync_execution) return; /* FIXME: cagney/1999-09-27: Closely related to the above. Make calls target_terminal_*() idenpotent. The event-loop GDB talking to an asynchronous target with a synchronous command calls this function from both event-top.c and infrun.c/infcmd.c. Once GDB stops trying to transfer the terminal to the target when it shouldn't this guard can go away. */ if (!remote_async_terminal_ours_p) return; delete_file_handler (input_fd); remote_async_terminal_ours_p = 0; initialize_sigint_signal_handler (); /* NOTE: At this point we could also register our selves as the recipient of all input. Any characters typed could then be passed on down to the target. */ } static void remote_async_terminal_ours (void) { /* See FIXME in remote_async_terminal_inferior. */ if (!sync_execution) return; /* See FIXME in remote_async_terminal_inferior. */ if (remote_async_terminal_ours_p) return; cleanup_sigint_signal_handler (NULL); add_file_handler (input_fd, stdin_event_handler, 0); remote_async_terminal_ours_p = 1; } /* If nonzero, ignore the next kill. */ int kill_kludge; void remote_console_output (char *msg) { char *p; for (p = msg; p[0] && p[1]; p += 2) { char tb[2]; char c = fromhex (p[0]) * 16 + fromhex (p[1]); tb[0] = c; tb[1] = 0; fputs_unfiltered (tb, gdb_stdtarg); } gdb_flush (gdb_stdtarg); } /* Wait until the remote machine stops, then return, storing status in STATUS just as `wait' would. Returns "pid", which in the case of a multi-threaded remote OS, is the thread-id. */ static ptid_t remote_wait (ptid_t ptid, struct target_waitstatus *status) { struct remote_state *rs = get_remote_state (); struct remote_arch_state *rsa = get_remote_arch_state (); ULONGEST thread_num = -1; ULONGEST addr; int solibs_changed = 0; status->kind = TARGET_WAITKIND_EXITED; status->value.integer = 0; while (1) { char *buf, *p; if (rs->cached_wait_status) /* Use the cached wait status, but only once. */ rs->cached_wait_status = 0; else { ofunc = signal (SIGINT, remote_interrupt); /* If the user hit C-c before this packet, or between packets, pretend that it was hit right here. */ if (quit_flag) { quit_flag = 0; remote_interrupt (SIGINT); } getpkt (&rs->buf, &rs->buf_size, 1); signal (SIGINT, ofunc); } buf = rs->buf; /* This is a hook for when we need to do something (perhaps the collection of trace data) every time the target stops. */ if (deprecated_target_wait_loop_hook) (*deprecated_target_wait_loop_hook) (); remote_stopped_by_watchpoint_p = 0; switch (buf[0]) { case 'E': /* Error of some sort. */ warning (_("Remote failure reply: %s"), buf); continue; case 'F': /* File-I/O request. */ remote_fileio_request (buf); continue; case 'T': /* Status with PC, SP, FP, ... */ { gdb_byte regs[MAX_REGISTER_SIZE]; /* Expedited reply, containing Signal, {regno, reg} repeat. */ /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where ss = signal number n... = register number r... = register contents */ p = &buf[3]; /* after Txx */ while (*p) { char *p1; char *p_temp; int fieldsize; LONGEST pnum = 0; /* If the packet contains a register number save it in pnum and set p1 to point to the character following it. Otherwise p1 points to p. */ /* If this packet is an awatch packet, don't parse the 'a' as a register number. */ if (strncmp (p, "awatch", strlen("awatch")) != 0) { /* Read the ``P'' register number. */ pnum = strtol (p, &p_temp, 16); p1 = p_temp; } else p1 = p; if (p1 == p) /* No register number present here. */ { p1 = strchr (p, ':'); if (p1 == NULL) error (_("Malformed packet(a) (missing colon): %s\n\ Packet: '%s'\n"), p, buf); if (strncmp (p, "thread", p1 - p) == 0) { p_temp = unpack_varlen_hex (++p1, &thread_num); record_currthread (thread_num); p = p_temp; } else if ((strncmp (p, "watch", p1 - p) == 0) || (strncmp (p, "rwatch", p1 - p) == 0) || (strncmp (p, "awatch", p1 - p) == 0)) { remote_stopped_by_watchpoint_p = 1; p = unpack_varlen_hex (++p1, &addr); remote_watch_data_address = (CORE_ADDR)addr; } else if (strncmp (p, "library", p1 - p) == 0) { p1++; p_temp = p1; while (*p_temp && *p_temp != ';') p_temp++; solibs_changed = 1; p = p_temp; } else { /* Silently skip unknown optional info. */ p_temp = strchr (p1 + 1, ';'); if (p_temp) p = p_temp; } } else { struct packet_reg *reg = packet_reg_from_pnum (rsa, pnum); p = p1; if (*p++ != ':') error (_("Malformed packet(b) (missing colon): %s\n\ Packet: '%s'\n"), p, buf); if (reg == NULL) error (_("Remote sent bad register number %s: %s\n\ Packet: '%s'\n"), phex_nz (pnum, 0), p, buf); fieldsize = hex2bin (p, regs, register_size (current_gdbarch, reg->regnum)); p += 2 * fieldsize; if (fieldsize < register_size (current_gdbarch, reg->regnum)) warning (_("Remote reply is too short: %s"), buf); regcache_raw_supply (get_current_regcache (), reg->regnum, regs); } if (*p++ != ';') error (_("Remote register badly formatted: %s\nhere: %s"), buf, p); } } /* fall through */ case 'S': /* Old style status, just signal only. */ if (solibs_changed) status->kind = TARGET_WAITKIND_LOADED; else { status->kind = TARGET_WAITKIND_STOPPED; status->value.sig = (enum target_signal) (((fromhex (buf[1])) << 4) + (fromhex (buf[2]))); } if (buf[3] == 'p') { thread_num = strtol ((const char *) &buf[4], NULL, 16); record_currthread (thread_num); } goto got_status; case 'W': /* Target exited. */ { /* The remote process exited. */ status->kind = TARGET_WAITKIND_EXITED; status->value.integer = (fromhex (buf[1]) << 4) + fromhex (buf[2]); goto got_status; } case 'X': status->kind = TARGET_WAITKIND_SIGNALLED; status->value.sig = (enum target_signal) (((fromhex (buf[1])) << 4) + (fromhex (buf[2]))); kill_kludge = 1; goto got_status; case 'O': /* Console output. */ remote_console_output (buf + 1); continue; case '\0': if (last_sent_signal != TARGET_SIGNAL_0) { /* Zero length reply means that we tried 'S' or 'C' and the remote system doesn't support it. */ target_terminal_ours_for_output (); printf_filtered ("Can't send signals to this remote system. %s not sent.\n", target_signal_to_name (last_sent_signal)); last_sent_signal = TARGET_SIGNAL_0; target_terminal_inferior (); strcpy ((char *) buf, last_sent_step ? "s" : "c"); putpkt ((char *) buf); continue; } /* else fallthrough */ default: warning (_("Invalid remote reply: %s"), buf); continue; } } got_status: if (thread_num != -1) { return pid_to_ptid (thread_num); } return inferior_ptid; } /* Async version of remote_wait. */ static ptid_t remote_async_wait (ptid_t ptid, struct target_waitstatus *status) { struct remote_state *rs = get_remote_state (); struct remote_arch_state *rsa = get_remote_arch_state (); ULONGEST thread_num = -1; ULONGEST addr; int solibs_changed = 0; status->kind = TARGET_WAITKIND_EXITED; status->value.integer = 0; remote_stopped_by_watchpoint_p = 0; while (1) { char *buf, *p; if (rs->cached_wait_status) /* Use the cached wait status, but only once. */ rs->cached_wait_status = 0; else { if (!target_is_async_p ()) { ofunc = signal (SIGINT, remote_interrupt); /* If the user hit C-c before this packet, or between packets, pretend that it was hit right here. */ if (quit_flag) { quit_flag = 0; remote_interrupt (SIGINT); } } /* FIXME: cagney/1999-09-27: If we're in async mode we should _never_ wait for ever -> test on target_is_async_p(). However, before we do that we need to ensure that the caller knows how to take the target into/out of async mode. */ getpkt (&rs->buf, &rs->buf_size, wait_forever_enabled_p); if (!target_is_async_p ()) signal (SIGINT, ofunc); } buf = rs->buf; /* This is a hook for when we need to do something (perhaps the collection of trace data) every time the target stops. */ if (deprecated_target_wait_loop_hook) (*deprecated_target_wait_loop_hook) (); switch (buf[0]) { case 'E': /* Error of some sort. */ warning (_("Remote failure reply: %s"), buf); continue; case 'F': /* File-I/O request. */ remote_fileio_request (buf); continue; case 'T': /* Status with PC, SP, FP, ... */ { gdb_byte regs[MAX_REGISTER_SIZE]; /* Expedited reply, containing Signal, {regno, reg} repeat. */ /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where ss = signal number n... = register number r... = register contents */ p = &buf[3]; /* after Txx */ while (*p) { char *p1; char *p_temp; int fieldsize; long pnum = 0; /* If the packet contains a register number, save it in pnum and set p1 to point to the character following it. Otherwise p1 points to p. */ /* If this packet is an awatch packet, don't parse the 'a' as a register number. */ if (strncmp (p, "awatch", strlen("awatch")) != 0) { /* Read the register number. */ pnum = strtol (p, &p_temp, 16); p1 = p_temp; } else p1 = p; if (p1 == p) /* No register number present here. */ { p1 = strchr (p, ':'); if (p1 == NULL) error (_("Malformed packet(a) (missing colon): %s\n\ Packet: '%s'\n"), p, buf); if (strncmp (p, "thread", p1 - p) == 0) { p_temp = unpack_varlen_hex (++p1, &thread_num); record_currthread (thread_num); p = p_temp; } else if ((strncmp (p, "watch", p1 - p) == 0) || (strncmp (p, "rwatch", p1 - p) == 0) || (strncmp (p, "awatch", p1 - p) == 0)) { remote_stopped_by_watchpoint_p = 1; p = unpack_varlen_hex (++p1, &addr); remote_watch_data_address = (CORE_ADDR)addr; } else if (strncmp (p, "library", p1 - p) == 0) { p1++; p_temp = p1; while (*p_temp && *p_temp != ';') p_temp++; solibs_changed = 1; p = p_temp; } else { /* Silently skip unknown optional info. */ p_temp = strchr (p1 + 1, ';'); if (p_temp) p = p_temp; } } else { struct packet_reg *reg = packet_reg_from_pnum (rsa, pnum); p = p1; if (*p++ != ':') error (_("Malformed packet(b) (missing colon): %s\n\ Packet: '%s'\n"), p, buf); if (reg == NULL) error (_("Remote sent bad register number %ld: %s\n\ Packet: '%s'\n"), pnum, p, buf); fieldsize = hex2bin (p, regs, register_size (current_gdbarch, reg->regnum)); p += 2 * fieldsize; if (fieldsize < register_size (current_gdbarch, reg->regnum)) warning (_("Remote reply is too short: %s"), buf); regcache_raw_supply (get_current_regcache (), reg->regnum, regs); } if (*p++ != ';') error (_("Remote register badly formatted: %s\nhere: %s"), buf, p); } } /* fall through */ case 'S': /* Old style status, just signal only. */ if (solibs_changed) status->kind = TARGET_WAITKIND_LOADED; else { status->kind = TARGET_WAITKIND_STOPPED; status->value.sig = (enum target_signal) (((fromhex (buf[1])) << 4) + (fromhex (buf[2]))); } if (buf[3] == 'p') { thread_num = strtol ((const char *) &buf[4], NULL, 16); record_currthread (thread_num); } goto got_status; case 'W': /* Target exited. */ { /* The remote process exited. */ status->kind = TARGET_WAITKIND_EXITED; status->value.integer = (fromhex (buf[1]) << 4) + fromhex (buf[2]); goto got_status; } case 'X': status->kind = TARGET_WAITKIND_SIGNALLED; status->value.sig = (enum target_signal) (((fromhex (buf[1])) << 4) + (fromhex (buf[2]))); kill_kludge = 1; goto got_status; case 'O': /* Console output. */ remote_console_output (buf + 1); /* Return immediately to the event loop. The event loop will still be waiting on the inferior afterwards. */ status->kind = TARGET_WAITKIND_IGNORE; goto got_status; case '\0': if (last_sent_signal != TARGET_SIGNAL_0) { /* Zero length reply means that we tried 'S' or 'C' and the remote system doesn't support it. */ target_terminal_ours_for_output (); printf_filtered ("Can't send signals to this remote system. %s not sent.\n", target_signal_to_name (last_sent_signal)); last_sent_signal = TARGET_SIGNAL_0; target_terminal_inferior (); strcpy ((char *) buf, last_sent_step ? "s" : "c"); putpkt ((char *) buf); continue; } /* else fallthrough */ default: warning (_("Invalid remote reply: %s"), buf); continue; } } got_status: if (thread_num != -1) { return pid_to_ptid (thread_num); } return inferior_ptid; } /* Fetch a single register using a 'p' packet. */ static int fetch_register_using_p (struct regcache *regcache, struct packet_reg *reg) { struct remote_state *rs = get_remote_state (); char *buf, *p; char regp[MAX_REGISTER_SIZE]; int i; if (remote_protocol_packets[PACKET_p].support == PACKET_DISABLE) return 0; if (reg->pnum == -1) return 0; p = rs->buf; *p++ = 'p'; p += hexnumstr (p, reg->pnum); *p++ = '\0'; remote_send (&rs->buf, &rs->buf_size); buf = rs->buf; switch (packet_ok (buf, &remote_protocol_packets[PACKET_p])) { case PACKET_OK: break; case PACKET_UNKNOWN: return 0; case PACKET_ERROR: error (_("Could not fetch register \"%s\""), gdbarch_register_name (get_regcache_arch (regcache), reg->regnum)); } /* If this register is unfetchable, tell the regcache. */ if (buf[0] == 'x') { regcache_raw_supply (regcache, reg->regnum, NULL); return 1; } /* Otherwise, parse and supply the value. */ p = buf; i = 0; while (p[0] != 0) { if (p[1] == 0) error (_("fetch_register_using_p: early buf termination")); regp[i++] = fromhex (p[0]) * 16 + fromhex (p[1]); p += 2; } regcache_raw_supply (regcache, reg->regnum, regp); return 1; } /* Fetch the registers included in the target's 'g' packet. */ static int send_g_packet (void) { struct remote_state *rs = get_remote_state (); int i, buf_len; char *p; char *regs; sprintf (rs->buf, "g"); remote_send (&rs->buf, &rs->buf_size); /* We can get out of synch in various cases. If the first character in the buffer is not a hex character, assume that has happened and try to fetch another packet to read. */ while ((rs->buf[0] < '0' || rs->buf[0] > '9') && (rs->buf[0] < 'A' || rs->buf[0] > 'F') && (rs->buf[0] < 'a' || rs->buf[0] > 'f') && rs->buf[0] != 'x') /* New: unavailable register value. */ { if (remote_debug) fprintf_unfiltered (gdb_stdlog, "Bad register packet; fetching a new packet\n"); getpkt (&rs->buf, &rs->buf_size, 0); } buf_len = strlen (rs->buf); /* Sanity check the received packet. */ if (buf_len % 2 != 0) error (_("Remote 'g' packet reply is of odd length: %s"), rs->buf); return buf_len / 2; } static void process_g_packet (struct regcache *regcache) { struct gdbarch *gdbarch = get_regcache_arch (regcache); struct remote_state *rs = get_remote_state (); struct remote_arch_state *rsa = get_remote_arch_state (); int i, buf_len; char *p; char *regs; buf_len = strlen (rs->buf); /* Further sanity checks, with knowledge of the architecture. */ if (buf_len > 2 * rsa->sizeof_g_packet) error (_("Remote 'g' packet reply is too long: %s"), rs->buf); /* Save the size of the packet sent to us by the target. It is used as a heuristic when determining the max size of packets that the target can safely receive. */ if (rsa->actual_register_packet_size == 0) rsa->actual_register_packet_size = buf_len; /* If this is smaller than we guessed the 'g' packet would be, update our records. A 'g' reply that doesn't include a register's value implies either that the register is not available, or that the 'p' packet must be used. */ if (buf_len < 2 * rsa->sizeof_g_packet) { rsa->sizeof_g_packet = buf_len / 2; for (i = 0; i < gdbarch_num_regs (gdbarch); i++) { if (rsa->regs[i].pnum == -1) continue; if (rsa->regs[i].offset >= rsa->sizeof_g_packet) rsa->regs[i].in_g_packet = 0; else rsa->regs[i].in_g_packet = 1; } } regs = alloca (rsa->sizeof_g_packet); /* Unimplemented registers read as all bits zero. */ memset (regs, 0, rsa->sizeof_g_packet); /* Reply describes registers byte by byte, each byte encoded as two hex characters. Suck them all up, then supply them to the register cacheing/storage mechanism. */ p = rs->buf; for (i = 0; i < rsa->sizeof_g_packet; i++) { if (p[0] == 0 || p[1] == 0) /* This shouldn't happen - we adjusted sizeof_g_packet above. */ internal_error (__FILE__, __LINE__, "unexpected end of 'g' packet reply"); if (p[0] == 'x' && p[1] == 'x') regs[i] = 0; /* 'x' */ else regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]); p += 2; } { int i; for (i = 0; i < gdbarch_num_regs (gdbarch); i++) { struct packet_reg *r = &rsa->regs[i]; if (r->in_g_packet) { if (r->offset * 2 >= strlen (rs->buf)) /* This shouldn't happen - we adjusted in_g_packet above. */ internal_error (__FILE__, __LINE__, "unexpected end of 'g' packet reply"); else if (rs->buf[r->offset * 2] == 'x') { gdb_assert (r->offset * 2 < strlen (rs->buf)); /* The register isn't available, mark it as such (at the same time setting the value to zero). */ regcache_raw_supply (regcache, r->regnum, NULL); } else regcache_raw_supply (regcache, r->regnum, regs + r->offset); } } } } static void fetch_registers_using_g (struct regcache *regcache) { send_g_packet (); process_g_packet (regcache); } static void remote_fetch_registers (struct regcache *regcache, int regnum) { struct remote_state *rs = get_remote_state (); struct remote_arch_state *rsa = get_remote_arch_state (); int i; set_thread (PIDGET (inferior_ptid), 1); if (regnum >= 0) { struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum); gdb_assert (reg != NULL); /* If this register might be in the 'g' packet, try that first - we are likely to read more than one register. If this is the first 'g' packet, we might be overly optimistic about its contents, so fall back to 'p'. */ if (reg->in_g_packet) { fetch_registers_using_g (regcache); if (reg->in_g_packet) return; } if (fetch_register_using_p (regcache, reg)) return; /* This register is not available. */ regcache_raw_supply (regcache, reg->regnum, NULL); return; } fetch_registers_using_g (regcache); for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) if (!rsa->regs[i].in_g_packet) if (!fetch_register_using_p (regcache, &rsa->regs[i])) { /* This register is not available. */ regcache_raw_supply (regcache, i, NULL); } } /* Prepare to store registers. Since we may send them all (using a 'G' request), we have to read out the ones we don't want to change first. */ static void remote_prepare_to_store (struct regcache *regcache) { struct remote_arch_state *rsa = get_remote_arch_state (); int i; gdb_byte buf[MAX_REGISTER_SIZE]; /* Make sure the entire registers array is valid. */ switch (remote_protocol_packets[PACKET_P].support) { case PACKET_DISABLE: case PACKET_SUPPORT_UNKNOWN: /* Make sure all the necessary registers are cached. */ for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) if (rsa->regs[i].in_g_packet) regcache_raw_read (regcache, rsa->regs[i].regnum, buf); break; case PACKET_ENABLE: break; } } /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF packet was not recognized. */ static int store_register_using_P (const struct regcache *regcache, struct packet_reg *reg) { struct gdbarch *gdbarch = get_regcache_arch (regcache); struct remote_state *rs = get_remote_state (); struct remote_arch_state *rsa = get_remote_arch_state (); /* Try storing a single register. */ char *buf = rs->buf; gdb_byte regp[MAX_REGISTER_SIZE]; char *p; if (remote_protocol_packets[PACKET_P].support == PACKET_DISABLE) return 0; if (reg->pnum == -1) return 0; xsnprintf (buf, get_remote_packet_size (), "P%s=", phex_nz (reg->pnum, 0)); p = buf + strlen (buf); regcache_raw_collect (regcache, reg->regnum, regp); bin2hex (regp, p, register_size (gdbarch, reg->regnum)); remote_send (&rs->buf, &rs->buf_size); switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_P])) { case PACKET_OK: return 1; case PACKET_ERROR: error (_("Could not write register \"%s\""), gdbarch_register_name (gdbarch, reg->regnum)); case PACKET_UNKNOWN: return 0; default: internal_error (__FILE__, __LINE__, _("Bad result from packet_ok")); } } /* Store register REGNUM, or all registers if REGNUM == -1, from the contents of the register cache buffer. FIXME: ignores errors. */ static void store_registers_using_G (const struct regcache *regcache) { struct remote_state *rs = get_remote_state (); struct remote_arch_state *rsa = get_remote_arch_state (); gdb_byte *regs; char *p; /* Extract all the registers in the regcache copying them into a local buffer. */ { int i; regs = alloca (rsa->sizeof_g_packet); memset (regs, 0, rsa->sizeof_g_packet); for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) { struct packet_reg *r = &rsa->regs[i]; if (r->in_g_packet) regcache_raw_collect (regcache, r->regnum, regs + r->offset); } } /* Command describes registers byte by byte, each byte encoded as two hex characters. */ p = rs->buf; *p++ = 'G'; /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets updated. */ bin2hex (regs, p, rsa->sizeof_g_packet); remote_send (&rs->buf, &rs->buf_size); } /* Store register REGNUM, or all registers if REGNUM == -1, from the contents of the register cache buffer. FIXME: ignores errors. */ static void remote_store_registers (struct regcache *regcache, int regnum) { struct remote_state *rs = get_remote_state (); struct remote_arch_state *rsa = get_remote_arch_state (); int i; set_thread (PIDGET (inferior_ptid), 1); if (regnum >= 0) { struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum); gdb_assert (reg != NULL); /* Always prefer to store registers using the 'P' packet if possible; we often change only a small number of registers. Sometimes we change a larger number; we'd need help from a higher layer to know to use 'G'. */ if (store_register_using_P (regcache, reg)) return; /* For now, don't complain if we have no way to write the register. GDB loses track of unavailable registers too easily. Some day, this may be an error. We don't have any way to read the register, either... */ if (!reg->in_g_packet) return; store_registers_using_G (regcache); return; } store_registers_using_G (regcache); for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) if (!rsa->regs[i].in_g_packet) if (!store_register_using_P (regcache, &rsa->regs[i])) /* See above for why we do not issue an error here. */ continue; } /* Return the number of hex digits in num. */ static int hexnumlen (ULONGEST num) { int i; for (i = 0; num != 0; i++) num >>= 4; return max (i, 1); } /* Set BUF to the minimum number of hex digits representing NUM. */ static int hexnumstr (char *buf, ULONGEST num) { int len = hexnumlen (num); return hexnumnstr (buf, num, len); } /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */ static int hexnumnstr (char *buf, ULONGEST num, int width) { int i; buf[width] = '\0'; for (i = width - 1; i >= 0; i--) { buf[i] = "0123456789abcdef"[(num & 0xf)]; num >>= 4; } return width; } /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */ static CORE_ADDR remote_address_masked (CORE_ADDR addr) { int address_size = remote_address_size; /* If "remoteaddresssize" was not set, default to target address size. */ if (!address_size) address_size = gdbarch_addr_bit (current_gdbarch); if (address_size > 0 && address_size < (sizeof (ULONGEST) * 8)) { /* Only create a mask when that mask can safely be constructed in a ULONGEST variable. */ ULONGEST mask = 1; mask = (mask << address_size) - 1; addr &= mask; } return addr; } /* Convert BUFFER, binary data at least LEN bytes long, into escaped binary data in OUT_BUF. Set *OUT_LEN to the length of the data encoded in OUT_BUF, and return the number of bytes in OUT_BUF (which may be more than *OUT_LEN due to escape characters). The total number of bytes in the output buffer will be at most OUT_MAXLEN. */ static int remote_escape_output (const gdb_byte *buffer, int len, gdb_byte *out_buf, int *out_len, int out_maxlen) { int input_index, output_index; output_index = 0; for (input_index = 0; input_index < len; input_index++) { gdb_byte b = buffer[input_index]; if (b == '$' || b == '#' || b == '}') { /* These must be escaped. */ if (output_index + 2 > out_maxlen) break; out_buf[output_index++] = '}'; out_buf[output_index++] = b ^ 0x20; } else { if (output_index + 1 > out_maxlen) break; out_buf[output_index++] = b; } } *out_len = input_index; return output_index; } /* Convert BUFFER, escaped data LEN bytes long, into binary data in OUT_BUF. Return the number of bytes written to OUT_BUF. Raise an error if the total number of bytes exceeds OUT_MAXLEN. This function reverses remote_escape_output. It allows more escaped characters than that function does, in particular because '*' must be escaped to avoid the run-length encoding processing in reading packets. */ static int remote_unescape_input (const gdb_byte *buffer, int len, gdb_byte *out_buf, int out_maxlen) { int input_index, output_index; int escaped; output_index = 0; escaped = 0; for (input_index = 0; input_index < len; input_index++) { gdb_byte b = buffer[input_index]; if (output_index + 1 > out_maxlen) { warning (_("Received too much data from remote target;" " ignoring overflow.")); return output_index; } if (escaped) { out_buf[output_index++] = b ^ 0x20; escaped = 0; } else if (b == '}') escaped = 1; else out_buf[output_index++] = b; } if (escaped) error (_("Unmatched escape character in target response.")); return output_index; } /* Determine whether the remote target supports binary downloading. This is accomplished by sending a no-op memory write of zero length to the target at the specified address. It does not suffice to send the whole packet, since many stubs strip the eighth bit and subsequently compute a wrong checksum, which causes real havoc with remote_write_bytes. NOTE: This can still lose if the serial line is not eight-bit clean. In cases like this, the user should clear "remote X-packet". */ static void check_binary_download (CORE_ADDR addr) { struct remote_state *rs = get_remote_state (); switch (remote_protocol_packets[PACKET_X].support) { case PACKET_DISABLE: break; case PACKET_ENABLE: break; case PACKET_SUPPORT_UNKNOWN: { char *p; p = rs->buf; *p++ = 'X'; p += hexnumstr (p, (ULONGEST) addr); *p++ = ','; p += hexnumstr (p, (ULONGEST) 0); *p++ = ':'; *p = '\0'; putpkt_binary (rs->buf, (int) (p - rs->buf)); getpkt (&rs->buf, &rs->buf_size, 0); if (rs->buf[0] == '\0') { if (remote_debug) fprintf_unfiltered (gdb_stdlog, "binary downloading NOT suppported by target\n"); remote_protocol_packets[PACKET_X].support = PACKET_DISABLE; } else { if (remote_debug) fprintf_unfiltered (gdb_stdlog, "binary downloading suppported by target\n"); remote_protocol_packets[PACKET_X].support = PACKET_ENABLE; } break; } } } /* Write memory data directly to the remote machine. This does not inform the data cache; the data cache uses this. HEADER is the starting part of the packet. MEMADDR is the address in the remote memory space. MYADDR is the address of the buffer in our space. LEN is the number of bytes. PACKET_FORMAT should be either 'X' or 'M', and indicates if we should send data as binary ('X'), or hex-encoded ('M'). The function creates packet of the form <HEADER><ADDRESS>,<LENGTH>:<DATA> where encoding of <DATA> is termined by PACKET_FORMAT. If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma are omitted. Returns the number of bytes transferred, or 0 (setting errno) for error. Only transfer a single packet. */ static int remote_write_bytes_aux (const char *header, CORE_ADDR memaddr, const gdb_byte *myaddr, int len, char packet_format, int use_length) { struct remote_state *rs = get_remote_state (); char *p; char *plen = NULL; int plenlen = 0; int todo; int nr_bytes; int payload_size; int payload_length; int header_length; if (packet_format != 'X' && packet_format != 'M') internal_error (__FILE__, __LINE__, "remote_write_bytes_aux: bad packet format"); if (len <= 0) return 0; payload_size = get_memory_write_packet_size (); /* The packet buffer will be large enough for the payload; get_memory_packet_size ensures this. */ rs->buf[0] = '\0'; /* Compute the size of the actual payload by subtracting out the packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */ payload_size -= strlen ("$,:#NN"); if (!use_length) /* The comma won't be used. */ payload_size += 1; header_length = strlen (header); payload_size -= header_length; payload_size -= hexnumlen (memaddr); /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */ strcat (rs->buf, header); p = rs->buf + strlen (header); /* Compute a best guess of the number of bytes actually transfered. */ if (packet_format == 'X') { /* Best guess at number of bytes that will fit. */ todo = min (len, payload_size); if (use_length) payload_size -= hexnumlen (todo); todo = min (todo, payload_size); } else { /* Num bytes that will fit. */ todo = min (len, payload_size / 2); if (use_length) payload_size -= hexnumlen (todo); todo = min (todo, payload_size / 2); } if (todo <= 0) internal_error (__FILE__, __LINE__, _("minumum packet size too small to write data")); /* If we already need another packet, then try to align the end of this packet to a useful boundary. */ if (todo > 2 * REMOTE_ALIGN_WRITES && todo < len) todo = ((memaddr + todo) & ~(REMOTE_ALIGN_WRITES - 1)) - memaddr; /* Append "<memaddr>". */ memaddr = remote_address_masked (memaddr); p += hexnumstr (p, (ULONGEST) memaddr); if (use_length) { /* Append ",". */ *p++ = ','; /* Append <len>. Retain the location/size of <len>. It may need to be adjusted once the packet body has been created. */ plen = p; plenlen = hexnumstr (p, (ULONGEST) todo); p += plenlen; } /* Append ":". */ *p++ = ':'; *p = '\0'; /* Append the packet body. */ if (packet_format == 'X') { /* Binary mode. Send target system values byte by byte, in increasing byte addresses. Only escape certain critical characters. */ payload_length = remote_escape_output (myaddr, todo, p, &nr_bytes, payload_size); /* If not all TODO bytes fit, then we'll need another packet. Make a second try to keep the end of the packet aligned. Don't do this if the packet is tiny. */ if (nr_bytes < todo && nr_bytes > 2 * REMOTE_ALIGN_WRITES) { int new_nr_bytes; new_nr_bytes = (((memaddr + nr_bytes) & ~(REMOTE_ALIGN_WRITES - 1)) - memaddr); if (new_nr_bytes != nr_bytes) payload_length = remote_escape_output (myaddr, new_nr_bytes, p, &nr_bytes, payload_size); } p += payload_length; if (use_length && nr_bytes < todo) { /* Escape chars have filled up the buffer prematurely, and we have actually sent fewer bytes than planned. Fix-up the length field of the packet. Use the same number of characters as before. */ plen += hexnumnstr (plen, (ULONGEST) nr_bytes, plenlen); *plen = ':'; /* overwrite \0 from hexnumnstr() */ } } else { /* Normal mode: Send target system values byte by byte, in increasing byte addresses. Each byte is encoded as a two hex value. */ nr_bytes = bin2hex (myaddr, p, todo); p += 2 * nr_bytes; } putpkt_binary (rs->buf, (int) (p - rs->buf)); getpkt (&rs->buf, &rs->buf_size, 0); if (rs->buf[0] == 'E') { /* There is no correspondance between what the remote protocol uses for errors and errno codes. We would like a cleaner way of representing errors (big enough to include errno codes, bfd_error codes, and others). But for now just return EIO. */ errno = EIO; return 0; } /* Return NR_BYTES, not TODO, in case escape chars caused us to send fewer bytes than we'd planned. */ return nr_bytes; } /* Write memory data directly to the remote machine. This does not inform the data cache; the data cache uses this. MEMADDR is the address in the remote memory space. MYADDR is the address of the buffer in our space. LEN is the number of bytes. Returns number of bytes transferred, or 0 (setting errno) for error. Only transfer a single packet. */ int remote_write_bytes (CORE_ADDR memaddr, const gdb_byte *myaddr, int len) { char *packet_format = 0; /* Check whether the target supports binary download. */ check_binary_download (memaddr); switch (remote_protocol_packets[PACKET_X].support) { case PACKET_ENABLE: packet_format = "X"; break; case PACKET_DISABLE: packet_format = "M"; break; case PACKET_SUPPORT_UNKNOWN: internal_error (__FILE__, __LINE__, _("remote_write_bytes: bad internal state")); default: internal_error (__FILE__, __LINE__, _("bad switch")); } return remote_write_bytes_aux (packet_format, memaddr, myaddr, len, packet_format[0], 1); } /* Read memory data directly from the remote machine. This does not use the data cache; the data cache uses this. MEMADDR is the address in the remote memory space. MYADDR is the address of the buffer in our space. LEN is the number of bytes. Returns number of bytes transferred, or 0 for error. */ /* NOTE: cagney/1999-10-18: This function (and its siblings in other remote targets) shouldn't attempt to read the entire buffer. Instead it should read a single packet worth of data and then return the byte size of that packet to the caller. The caller (its caller and its callers caller ;-) already contains code for handling partial reads. */ int remote_read_bytes (CORE_ADDR memaddr, gdb_byte *myaddr, int len) { struct remote_state *rs = get_remote_state (); int max_buf_size; /* Max size of packet output buffer. */ int origlen; if (len <= 0) return 0; max_buf_size = get_memory_read_packet_size (); /* The packet buffer will be large enough for the payload; get_memory_packet_size ensures this. */ origlen = len; while (len > 0) { char *p; int todo; int i; todo = min (len, max_buf_size / 2); /* num bytes that will fit */ /* construct "m"<memaddr>","<len>" */ /* sprintf (rs->buf, "m%lx,%x", (unsigned long) memaddr, todo); */ memaddr = remote_address_masked (memaddr); p = rs->buf; *p++ = 'm'; p += hexnumstr (p, (ULONGEST) memaddr); *p++ = ','; p += hexnumstr (p, (ULONGEST) todo); *p = '\0'; putpkt (rs->buf); getpkt (&rs->buf, &rs->buf_size, 0); if (rs->buf[0] == 'E' && isxdigit (rs->buf[1]) && isxdigit (rs->buf[2]) && rs->buf[3] == '\0') { /* There is no correspondance between what the remote protocol uses for errors and errno codes. We would like a cleaner way of representing errors (big enough to include errno codes, bfd_error codes, and others). But for now just return EIO. */ errno = EIO; return 0; } /* Reply describes memory byte by byte, each byte encoded as two hex characters. */ p = rs->buf; if ((i = hex2bin (p, myaddr, todo)) < todo) { /* Reply is short. This means that we were able to read only part of what we wanted to. */ return i + (origlen - len); } myaddr += todo; memaddr += todo; len -= todo; } return origlen; } /* Read or write LEN bytes from inferior memory at MEMADDR, transferring to or from debugger address BUFFER. Write to inferior if SHOULD_WRITE is nonzero. Returns length of data written or read; 0 for error. TARGET is unused. */ static int remote_xfer_memory (CORE_ADDR mem_addr, gdb_byte *buffer, int mem_len, int should_write, struct mem_attrib *attrib, struct target_ops *target) { int res; if (should_write) res = remote_write_bytes (mem_addr, buffer, mem_len); else res = remote_read_bytes (mem_addr, buffer, mem_len); return res; } /* Sends a packet with content determined by the printf format string FORMAT and the remaining arguments, then gets the reply. Returns whether the packet was a success, a failure, or unknown. */ enum packet_result remote_send_printf (const char *format, ...) { struct remote_state *rs = get_remote_state (); int max_size = get_remote_packet_size (); va_list ap; va_start (ap, format); rs->buf[0] = '\0'; if (vsnprintf (rs->buf, max_size, format, ap) >= max_size) internal_error (__FILE__, __LINE__, "Too long remote packet."); if (putpkt (rs->buf) < 0) error (_("Communication problem with target.")); rs->buf[0] = '\0'; getpkt (&rs->buf, &rs->buf_size, 0); return packet_check_result (rs->buf); } static void restore_remote_timeout (void *p) { int value = *(int *)p; remote_timeout = value; } /* Flash writing can take quite some time. We'll set effectively infinite timeout for flash operations. In future, we'll need to decide on a better approach. */ static const int remote_flash_timeout = 1000; static void remote_flash_erase (struct target_ops *ops, ULONGEST address, LONGEST length) { int saved_remote_timeout = remote_timeout; enum packet_result ret; struct cleanup *back_to = make_cleanup (restore_remote_timeout, &saved_remote_timeout); remote_timeout = remote_flash_timeout; ret = remote_send_printf ("vFlashErase:%s,%s", paddr (address), phex (length, 4)); switch (ret) { case PACKET_UNKNOWN: error (_("Remote target does not support flash erase")); case PACKET_ERROR: error (_("Error erasing flash with vFlashErase packet")); default: break; } do_cleanups (back_to); } static LONGEST remote_flash_write (struct target_ops *ops, ULONGEST address, LONGEST length, const gdb_byte *data) { int saved_remote_timeout = remote_timeout; int ret; struct cleanup *back_to = make_cleanup (restore_remote_timeout, &saved_remote_timeout); remote_timeout = remote_flash_timeout; ret = remote_write_bytes_aux ("vFlashWrite:", address, data, length, 'X', 0); do_cleanups (back_to); return ret; } static void remote_flash_done (struct target_ops *ops) { int saved_remote_timeout = remote_timeout; int ret; struct cleanup *back_to = make_cleanup (restore_remote_timeout, &saved_remote_timeout); remote_timeout = remote_flash_timeout; ret = remote_send_printf ("vFlashDone"); do_cleanups (back_to); switch (ret) { case PACKET_UNKNOWN: error (_("Remote target does not support vFlashDone")); case PACKET_ERROR: error (_("Error finishing flash operation")); default: break; } } static void remote_files_info (struct target_ops *ignore) { puts_filtered ("Debugging a target over a serial line.\n"); } /* Stuff for dealing with the packets which are part of this protocol. See comment at top of file for details. */ /* Read a single character from the remote end. */ static int readchar (int timeout) { int ch; ch = serial_readchar (remote_desc, timeout); if (ch >= 0) return ch; switch ((enum serial_rc) ch) { case SERIAL_EOF: target_mourn_inferior (); error (_("Remote connection closed")); /* no return */ case SERIAL_ERROR: perror_with_name (_("Remote communication error")); /* no return */ case SERIAL_TIMEOUT: break; } return ch; } /* Send the command in *BUF to the remote machine, and read the reply into *BUF. Report an error if we get an error reply. Resize *BUF using xrealloc if necessary to hold the result, and update *SIZEOF_BUF. */ static void remote_send (char **buf, long *sizeof_buf) { putpkt (*buf); getpkt (buf, sizeof_buf, 0); if ((*buf)[0] == 'E') error (_("Remote failure reply: %s"), *buf); } /* Display a null-terminated packet on stdout, for debugging, using C string notation. */ static void print_packet (char *buf) { puts_filtered ("\""); fputstr_filtered (buf, '"', gdb_stdout); puts_filtered ("\""); } int putpkt (char *buf) { return putpkt_binary (buf, strlen (buf)); } /* Send a packet to the remote machine, with error checking. The data of the packet is in BUF. The string in BUF can be at most get_remote_packet_size () - 5 to account for the $, # and checksum, and for a possible /0 if we are debugging (remote_debug) and want to print the sent packet as a string. */ static int putpkt_binary (char *buf, int cnt) { struct remote_state *rs = get_remote_state (); int i; unsigned char csum = 0; char *buf2 = alloca (cnt + 6); int ch; int tcount = 0; char *p; /* We're sending out a new packet. Make sure we don't look at a stale cached response. */ rs->cached_wait_status = 0; /* Copy the packet into buffer BUF2, encapsulating it and giving it a checksum. */ p = buf2; *p++ = '$'; for (i = 0; i < cnt; i++) { csum += buf[i]; *p++ = buf[i]; } *p++ = '#'; *p++ = tohex ((csum >> 4) & 0xf); *p++ = tohex (csum & 0xf); /* Send it over and over until we get a positive ack. */ while (1) { int started_error_output = 0; if (remote_debug) { *p = '\0'; fprintf_unfiltered (gdb_stdlog, "Sending packet: "); fputstrn_unfiltered (buf2, p - buf2, 0, gdb_stdlog); fprintf_unfiltered (gdb_stdlog, "..."); gdb_flush (gdb_stdlog); } if (serial_write (remote_desc, buf2, p - buf2)) perror_with_name (_("putpkt: write failed")); /* Read until either a timeout occurs (-2) or '+' is read. */ while (1) { ch = readchar (remote_timeout); if (remote_debug) { switch (ch) { case '+': case '-': case SERIAL_TIMEOUT: case '$': if (started_error_output) { putchar_unfiltered ('\n'); started_error_output = 0; } } } switch (ch) { case '+': if (remote_debug) fprintf_unfiltered (gdb_stdlog, "Ack\n"); return 1; case '-': if (remote_debug) fprintf_unfiltered (gdb_stdlog, "Nak\n"); case SERIAL_TIMEOUT: tcount++; if (tcount > 3) return 0; break; /* Retransmit buffer. */ case '$': { if (remote_debug) fprintf_unfiltered (gdb_stdlog, "Packet instead of Ack, ignoring it\n"); /* It's probably an old response sent because an ACK was lost. Gobble up the packet and ack it so it doesn't get retransmitted when we resend this packet. */ skip_frame (); serial_write (remote_desc, "+", 1); continue; /* Now, go look for +. */ } default: if (remote_debug) { if (!started_error_output) { started_error_output = 1; fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: "); } fputc_unfiltered (ch & 0177, gdb_stdlog); } continue; } break; /* Here to retransmit. */ } #if 0 /* This is wrong. If doing a long backtrace, the user should be able to get out next time we call QUIT, without anything as violent as interrupt_query. If we want to provide a way out of here without getting to the next QUIT, it should be based on hitting ^C twice as in remote_wait. */ if (quit_flag) { quit_flag = 0; interrupt_query (); } #endif } } /* Come here after finding the start of a frame when we expected an ack. Do our best to discard the rest of this packet. */ static void skip_frame (void) { int c; while (1) { c = readchar (remote_timeout); switch (c) { case SERIAL_TIMEOUT: /* Nothing we can do. */ return; case '#': /* Discard the two bytes of checksum and stop. */ c = readchar (remote_timeout); if (c >= 0) c = readchar (remote_timeout); return; case '*': /* Run length encoding. */ /* Discard the repeat count. */ c = readchar (remote_timeout); if (c < 0) return; break; default: /* A regular character. */ break; } } } /* Come here after finding the start of the frame. Collect the rest into *BUF, verifying the checksum, length, and handling run-length compression. NUL terminate the buffer. If there is not enough room, expand *BUF using xrealloc. Returns -1 on error, number of characters in buffer (ignoring the trailing NULL) on success. (could be extended to return one of the SERIAL status indications). */ static long read_frame (char **buf_p, long *sizeof_buf) { unsigned char csum; long bc; int c; char *buf = *buf_p; csum = 0; bc = 0; while (1) { c = readchar (remote_timeout); switch (c) { case SERIAL_TIMEOUT: if (remote_debug) fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog); return -1; case '$': if (remote_debug) fputs_filtered ("Saw new packet start in middle of old one\n", gdb_stdlog); return -1; /* Start a new packet, count retries. */ case '#': { unsigned char pktcsum; int check_0 = 0; int check_1 = 0; buf[bc] = '\0'; check_0 = readchar (remote_timeout); if (check_0 >= 0) check_1 = readchar (remote_timeout); if (check_0 == SERIAL_TIMEOUT || check_1 == SERIAL_TIMEOUT) { if (remote_debug) fputs_filtered ("Timeout in checksum, retrying\n", gdb_stdlog); return -1; } else if (check_0 < 0 || check_1 < 0) { if (remote_debug) fputs_filtered ("Communication error in checksum\n", gdb_stdlog); return -1; } pktcsum = (fromhex (check_0) << 4) | fromhex (check_1); if (csum == pktcsum) return bc; if (remote_debug) { fprintf_filtered (gdb_stdlog, "Bad checksum, sentsum=0x%x, csum=0x%x, buf=", pktcsum, csum); fputstrn_filtered (buf, bc, 0, gdb_stdlog); fputs_filtered ("\n", gdb_stdlog); } /* Number of characters in buffer ignoring trailing NULL. */ return -1; } case '*': /* Run length encoding. */ { int repeat; csum += c; c = readchar (remote_timeout); csum += c; repeat = c - ' ' + 3; /* Compute repeat count. */ /* The character before ``*'' is repeated. */ if (repeat > 0 && repeat <= 255 && bc > 0) { if (bc + repeat - 1 >= *sizeof_buf - 1) { /* Make some more room in the buffer. */ *sizeof_buf += repeat; *buf_p = xrealloc (*buf_p, *sizeof_buf); buf = *buf_p; } memset (&buf[bc], buf[bc - 1], repeat); bc += repeat; continue; } buf[bc] = '\0'; printf_filtered (_("Invalid run length encoding: %s\n"), buf); return -1; } default: if (bc >= *sizeof_buf - 1) { /* Make some more room in the buffer. */ *sizeof_buf *= 2; *buf_p = xrealloc (*buf_p, *sizeof_buf); buf = *buf_p; } buf[bc++] = c; csum += c; continue; } } } /* Read a packet from the remote machine, with error checking, and store it in *BUF. Resize *BUF using xrealloc if necessary to hold the result, and update *SIZEOF_BUF. If FOREVER, wait forever rather than timing out; this is used (in synchronous mode) to wait for a target that is is executing user code to stop. */ /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we don't have to change all the calls to getpkt to deal with the return value, because at the moment I don't know what the right thing to do it for those. */ void getpkt (char **buf, long *sizeof_buf, int forever) { int timed_out; timed_out = getpkt_sane (buf, sizeof_buf, forever); } /* Read a packet from the remote machine, with error checking, and store it in *BUF. Resize *BUF using xrealloc if necessary to hold the result, and update *SIZEOF_BUF. If FOREVER, wait forever rather than timing out; this is used (in synchronous mode) to wait for a target that is is executing user code to stop. If FOREVER == 0, this function is allowed to time out gracefully and return an indication of this to the caller. Otherwise return the number of bytes read. */ static int getpkt_sane (char **buf, long *sizeof_buf, int forever) { struct remote_state *rs = get_remote_state (); int c; int tries; int timeout; int val; /* We're reading a new response. Make sure we don't look at a previously cached response. */ rs->cached_wait_status = 0; strcpy (*buf, "timeout"); if (forever) { timeout = watchdog > 0 ? watchdog : -1; } else timeout = remote_timeout; #define MAX_TRIES 3 for (tries = 1; tries <= MAX_TRIES; tries++) { /* This can loop forever if the remote side sends us characters continuously, but if it pauses, we'll get a zero from readchar because of timeout. Then we'll count that as a retry. */ /* Note that we will only wait forever prior to the start of a packet. After that, we expect characters to arrive at a brisk pace. They should show up within remote_timeout intervals. */ do { c = readchar (timeout); if (c == SERIAL_TIMEOUT) { if (forever) /* Watchdog went off? Kill the target. */ { QUIT; target_mourn_inferior (); error (_("Watchdog timeout has expired. Target detached.")); } if (remote_debug) fputs_filtered ("Timed out.\n", gdb_stdlog); goto retry; } } while (c != '$'); /* We've found the start of a packet, now collect the data. */ val = read_frame (buf, sizeof_buf); if (val >= 0) { if (remote_debug) { fprintf_unfiltered (gdb_stdlog, "Packet received: "); fputstrn_unfiltered (*buf, val, 0, gdb_stdlog); fprintf_unfiltered (gdb_stdlog, "\n"); } serial_write (remote_desc, "+", 1); return val; } /* Try the whole thing again. */ retry: serial_write (remote_desc, "-", 1); } /* We have tried hard enough, and just can't receive the packet. Give up. */ printf_unfiltered (_("Ignoring packet error, continuing...\n")); serial_write (remote_desc, "+", 1); return -1; } static void remote_kill (void) { /* For some mysterious reason, wait_for_inferior calls kill instead of mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */ if (kill_kludge) { kill_kludge = 0; target_mourn_inferior (); return; } /* Use catch_errors so the user can quit from gdb even when we aren't on speaking terms with the remote system. */ catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR); /* Don't wait for it to die. I'm not really sure it matters whether we do or not. For the existing stubs, kill is a noop. */ target_mourn_inferior (); } /* Async version of remote_kill. */ static void remote_async_kill (void) { /* Unregister the file descriptor from the event loop. */ if (target_is_async_p ()) serial_async (remote_desc, NULL, 0); /* For some mysterious reason, wait_for_inferior calls kill instead of mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */ if (kill_kludge) { kill_kludge = 0; target_mourn_inferior (); return; } /* Use catch_errors so the user can quit from gdb even when we aren't on speaking terms with the remote system. */ catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR); /* Don't wait for it to die. I'm not really sure it matters whether we do or not. For the existing stubs, kill is a noop. */ target_mourn_inferior (); } static void remote_mourn (void) { remote_mourn_1 (&remote_ops); } static void remote_async_mourn (void) { remote_mourn_1 (&remote_async_ops); } /* Worker function for remote_mourn. */ static void remote_mourn_1 (struct target_ops *target) { unpush_target (target); generic_mourn_inferior (); } static void extended_remote_mourn_1 (struct target_ops *target) { struct remote_state *rs = get_remote_state (); /* Unlike "target remote", we do not want to unpush the target; then the next time the user says "run", we won't be connected. */ /* Call common code to mark the inferior as not running. */ generic_mourn_inferior (); /* Check whether the target is running now - some remote stubs automatically restart after kill. */ putpkt ("?"); getpkt (&rs->buf, &rs->buf_size, 0); if (rs->buf[0] == 'S' || rs->buf[0] == 'T') { /* Assume that the target has been restarted. Set inferior_ptid so that bits of core GDB realizes there's something here, e.g., so that the user can say "kill" again. */ inferior_ptid = pid_to_ptid (MAGIC_NULL_PID); } else { /* Mark this (still pushed) target as not executable until we restart it. */ target_mark_exited (target); } } static void extended_remote_mourn (void) { extended_remote_mourn_1 (&extended_remote_ops); } static void extended_async_remote_mourn (void) { extended_remote_mourn_1 (&extended_async_remote_ops); } static int extended_remote_run (char *args) { struct remote_state *rs = get_remote_state (); char *p; int len; /* If the user has disabled vRun support, or we have detected that support is not available, do not try it. */ if (remote_protocol_packets[PACKET_vRun].support == PACKET_DISABLE) return -1; strcpy (rs->buf, "vRun;"); len = strlen (rs->buf); if (strlen (remote_exec_file) * 2 + len >= get_remote_packet_size ()) error (_("Remote file name too long for run packet")); len += 2 * bin2hex ((gdb_byte *) remote_exec_file, rs->buf + len, 0); if (*args) { struct cleanup *back_to; int i; char **argv; argv = buildargv (args); back_to = make_cleanup ((void (*) (void *)) freeargv, argv); for (i = 0; argv[i] != NULL; i++) { if (strlen (argv[i]) * 2 + 1 + len >= get_remote_packet_size ()) error (_("Argument list too long for run packet")); rs->buf[len++] = ';'; len += 2 * bin2hex ((gdb_byte *) argv[i], rs->buf + len, 0); } do_cleanups (back_to); } rs->buf[len++] = '\0'; putpkt (rs->buf); getpkt (&rs->buf, &rs->buf_size, 0); if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vRun]) == PACKET_OK) { /* We have a wait response; we don't need it, though. All is well. */ return 0; } else if (remote_protocol_packets[PACKET_vRun].support == PACKET_DISABLE) /* It wasn't disabled before, but it is now. */ return -1; else { if (remote_exec_file[0] == '\0') error (_("Running the default executable on the remote target failed; " "try \"set remote exec-file\"?")); else error (_("Running \"%s\" on the remote target failed"), remote_exec_file); } } /* In the extended protocol we want to be able to do things like "run" and have them basically work as expected. So we need a special create_inferior function. We support changing the executable file and the command line arguments, but not the environment. */ static void extended_remote_create_inferior_1 (char *exec_file, char *args, char **env, int from_tty, int async_p) { /* If running asynchronously, register the target file descriptor with the event loop. */ if (async_p && target_can_async_p ()) target_async (inferior_event_handler, 0); /* Now restart the remote server. */ if (extended_remote_run (args) == -1) { /* vRun was not supported. Fail if we need it to do what the user requested. */ if (remote_exec_file[0]) error (_("Remote target does not support \"set remote exec-file\"")); if (args[0]) error (_("Remote target does not support \"set args\" or run <ARGS>")); /* Fall back to "R". */ extended_remote_restart (); } /* Now mark the inferior as running before we do anything else. */ attach_flag = 0; inferior_ptid = pid_to_ptid (MAGIC_NULL_PID); if (async_p) target_mark_running (&extended_async_remote_ops); else target_mark_running (&extended_remote_ops); /* Get updated offsets, if the stub uses qOffsets. */ get_offsets (); /* Clean up from the last time we were running. */ init_thread_list (); init_wait_for_inferior (); } static void extended_remote_create_inferior (char *exec_file, char *args, char **env, int from_tty) { extended_remote_create_inferior_1 (exec_file, args, env, from_tty, 0); } static void extended_remote_async_create_inferior (char *exec_file, char *args, char **env, int from_tty) { extended_remote_create_inferior_1 (exec_file, args, env, from_tty, 1); } /* Insert a breakpoint. On targets that have software breakpoint support, we ask the remote target to do the work; on targets which don't, we insert a traditional memory breakpoint. */ static int remote_insert_breakpoint (struct bp_target_info *bp_tgt) { CORE_ADDR addr = bp_tgt->placed_address; struct remote_state *rs = get_remote_state (); /* Try the "Z" s/w breakpoint packet if it is not already disabled. If it succeeds, then set the support to PACKET_ENABLE. If it fails, and the user has explicitly requested the Z support then report an error, otherwise, mark it disabled and go on. */ if (remote_protocol_packets[PACKET_Z0].support != PACKET_DISABLE) { char *p = rs->buf; *(p++) = 'Z'; *(p++) = '0'; *(p++) = ','; gdbarch_breakpoint_from_pc (current_gdbarch, &bp_tgt->placed_address, &bp_tgt->placed_size); addr = (ULONGEST) remote_address_masked (bp_tgt->placed_address); p += hexnumstr (p, addr); sprintf (p, ",%d", bp_tgt->placed_size); putpkt (rs->buf); getpkt (&rs->buf, &rs->buf_size, 0); switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0])) { case PACKET_ERROR: return -1; case PACKET_OK: return 0; case PACKET_UNKNOWN: break; } } return memory_insert_breakpoint (bp_tgt); } static int remote_remove_breakpoint (struct bp_target_info *bp_tgt) { CORE_ADDR addr = bp_tgt->placed_address; struct remote_state *rs = get_remote_state (); int bp_size; if (remote_protocol_packets[PACKET_Z0].support != PACKET_DISABLE) { char *p = rs->buf; *(p++) = 'z'; *(p++) = '0'; *(p++) = ','; addr = (ULONGEST) remote_address_masked (bp_tgt->placed_address); p += hexnumstr (p, addr); sprintf (p, ",%d", bp_tgt->placed_size); putpkt (rs->buf); getpkt (&rs->buf, &rs->buf_size, 0); return (rs->buf[0] == 'E'); } return memory_remove_breakpoint (bp_tgt); } static int watchpoint_to_Z_packet (int type) { switch (type) { case hw_write: return Z_PACKET_WRITE_WP; break; case hw_read: return Z_PACKET_READ_WP; break; case hw_access: return Z_PACKET_ACCESS_WP; break; default: internal_error (__FILE__, __LINE__, _("hw_bp_to_z: bad watchpoint type %d"), type); } } static int remote_insert_watchpoint (CORE_ADDR addr, int len, int type) { struct remote_state *rs = get_remote_state (); char *p; enum Z_packet_type packet = watchpoint_to_Z_packet (type); if (remote_protocol_packets[PACKET_Z0 + packet].support == PACKET_DISABLE) return -1; sprintf (rs->buf, "Z%x,", packet); p = strchr (rs->buf, '\0'); addr = remote_address_masked (addr); p += hexnumstr (p, (ULONGEST) addr); sprintf (p, ",%x", len); putpkt (rs->buf); getpkt (&rs->buf, &rs->buf_size, 0); switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet])) { case PACKET_ERROR: case PACKET_UNKNOWN: return -1; case PACKET_OK: return 0; } internal_error (__FILE__, __LINE__, _("remote_insert_watchpoint: reached end of function")); } static int remote_remove_watchpoint (CORE_ADDR addr, int len, int type) { struct remote_state *rs = get_remote_state (); char *p; enum Z_packet_type packet = watchpoint_to_Z_packet (type); if (remote_protocol_packets[PACKET_Z0 + packet].support == PACKET_DISABLE) return -1; sprintf (rs->buf, "z%x,", packet); p = strchr (rs->buf, '\0'); addr = remote_address_masked (addr); p += hexnumstr (p, (ULONGEST) addr); sprintf (p, ",%x", len); putpkt (rs->buf); getpkt (&rs->buf, &rs->buf_size, 0); switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet])) { case PACKET_ERROR: case PACKET_UNKNOWN: return -1; case PACKET_OK: return 0; } internal_error (__FILE__, __LINE__, _("remote_remove_watchpoint: reached end of function")); } int remote_hw_watchpoint_limit = -1; int remote_hw_breakpoint_limit = -1; static int remote_check_watch_resources (int type, int cnt, int ot) { if (type == bp_hardware_breakpoint) { if (remote_hw_breakpoint_limit == 0) return 0; else if (remote_hw_breakpoint_limit < 0) return 1; else if (cnt <= remote_hw_breakpoint_limit) return 1; } else { if (remote_hw_watchpoint_limit == 0) return 0; else if (remote_hw_watchpoint_limit < 0) return 1; else if (ot) return -1; else if (cnt <= remote_hw_watchpoint_limit) return 1; } return -1; } static int remote_stopped_by_watchpoint (void) { return remote_stopped_by_watchpoint_p; } static int remote_stopped_data_address (struct target_ops *target, CORE_ADDR *addr_p) { int rc = 0; if (remote_stopped_by_watchpoint ()) { *addr_p = remote_watch_data_address; rc = 1; } return rc; } static int remote_insert_hw_breakpoint (struct bp_target_info *bp_tgt) { CORE_ADDR addr; struct remote_state *rs = get_remote_state (); char *p = rs->buf; /* The length field should be set to the size of a breakpoint instruction, even though we aren't inserting one ourselves. */ gdbarch_breakpoint_from_pc (current_gdbarch, &bp_tgt->placed_address, &bp_tgt->placed_size); if (remote_protocol_packets[PACKET_Z1].support == PACKET_DISABLE) return -1; *(p++) = 'Z'; *(p++) = '1'; *(p++) = ','; addr = remote_address_masked (bp_tgt->placed_address); p += hexnumstr (p, (ULONGEST) addr); sprintf (p, ",%x", bp_tgt->placed_size); putpkt (rs->buf); getpkt (&rs->buf, &rs->buf_size, 0); switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1])) { case PACKET_ERROR: case PACKET_UNKNOWN: return -1; case PACKET_OK: return 0; } internal_error (__FILE__, __LINE__, _("remote_insert_hw_breakpoint: reached end of function")); } static int remote_remove_hw_breakpoint (struct bp_target_info *bp_tgt) { CORE_ADDR addr; struct remote_state *rs = get_remote_state (); char *p = rs->buf; if (remote_protocol_packets[PACKET_Z1].support == PACKET_DISABLE) return -1; *(p++) = 'z'; *(p++) = '1'; *(p++) = ','; addr = remote_address_masked (bp_tgt->placed_address); p += hexnumstr (p, (ULONGEST) addr); sprintf (p, ",%x", bp_tgt->placed_size); putpkt (rs->buf); getpkt (&rs->buf, &rs->buf_size, 0); switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1])) { case PACKET_ERROR: case PACKET_UNKNOWN: return -1; case PACKET_OK: return 0; } internal_error (__FILE__, __LINE__, _("remote_remove_hw_breakpoint: reached end of function")); } /* Some targets are only capable of doing downloads, and afterwards they switch to the remote serial protocol. This function provides a clean way to get from the download target to the remote target. It's basically just a wrapper so that we don't have to expose any of the internal workings of remote.c. Prior to calling this routine, you should shutdown the current target code, else you will get the "A program is being debugged already..." message. Usually a call to pop_target() suffices. */ void push_remote_target (char *name, int from_tty) { printf_filtered (_("Switching to remote protocol\n")); remote_open (name, from_tty); } /* Table used by the crc32 function to calcuate the checksum. */ static unsigned long crc32_table[256] = {0, 0}; static unsigned long crc32 (unsigned char *buf, int len, unsigned int crc) { if (!crc32_table[1]) { /* Initialize the CRC table and the decoding table. */ int i, j; unsigned int c; for (i = 0; i < 256; i++) { for (c = i << 24, j = 8; j > 0; --j) c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1); crc32_table[i] = c; } } while (len--) { crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ *buf) & 255]; buf++; } return crc; } /* compare-sections command With no arguments, compares each loadable section in the exec bfd with the same memory range on the target, and reports mismatches. Useful for verifying the image on the target against the exec file. Depends on the target understanding the new "qCRC:" request. */ /* FIXME: cagney/1999-10-26: This command should be broken down into a target method (target verify memory) and generic version of the actual command. This will allow other high-level code (especially generic_load()) to make use of this target functionality. */ static void compare_sections_command (char *args, int from_tty) { struct remote_state *rs = get_remote_state (); asection *s; unsigned long host_crc, target_crc; extern bfd *exec_bfd; struct cleanup *old_chain; char *tmp; char *sectdata; const char *sectname; bfd_size_type size; bfd_vma lma; int matched = 0; int mismatched = 0; if (!exec_bfd) error (_("command cannot be used without an exec file")); if (!current_target.to_shortname || strcmp (current_target.to_shortname, "remote") != 0) error (_("command can only be used with remote target")); for (s = exec_bfd->sections; s; s = s->next) { if (!(s->flags & SEC_LOAD)) continue; /* skip non-loadable section */ size = bfd_get_section_size (s); if (size == 0) continue; /* skip zero-length section */ sectname = bfd_get_section_name (exec_bfd, s); if (args && strcmp (args, sectname) != 0) continue; /* not the section selected by user */ matched = 1; /* do this section */ lma = s->lma; /* FIXME: assumes lma can fit into long. */ xsnprintf (rs->buf, get_remote_packet_size (), "qCRC:%lx,%lx", (long) lma, (long) size); putpkt (rs->buf); /* Be clever; compute the host_crc before waiting for target reply. */ sectdata = xmalloc (size); old_chain = make_cleanup (xfree, sectdata); bfd_get_section_contents (exec_bfd, s, sectdata, 0, size); host_crc = crc32 ((unsigned char *) sectdata, size, 0xffffffff); getpkt (&rs->buf, &rs->buf_size, 0); if (rs->buf[0] == 'E') error (_("target memory fault, section %s, range 0x%s -- 0x%s"), sectname, paddr (lma), paddr (lma + size)); if (rs->buf[0] != 'C') error (_("remote target does not support this operation")); for (target_crc = 0, tmp = &rs->buf[1]; *tmp; tmp++) target_crc = target_crc * 16 + fromhex (*tmp); printf_filtered ("Section %s, range 0x%s -- 0x%s: ", sectname, paddr (lma), paddr (lma + size)); if (host_crc == target_crc) printf_filtered ("matched.\n"); else { printf_filtered ("MIS-MATCHED!\n"); mismatched++; } do_cleanups (old_chain); } if (mismatched > 0) warning (_("One or more sections of the remote executable does not match\n\ the loaded file\n")); if (args && !matched) printf_filtered (_("No loaded section named '%s'.\n"), args); } /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET into remote target. The number of bytes written to the remote target is returned, or -1 for error. */ static LONGEST remote_write_qxfer (struct target_ops *ops, const char *object_name, const char *annex, const gdb_byte *writebuf, ULONGEST offset, LONGEST len, struct packet_config *packet) { int i, buf_len; ULONGEST n; gdb_byte *wbuf; struct remote_state *rs = get_remote_state (); int max_size = get_memory_write_packet_size (); if (packet->support == PACKET_DISABLE) return -1; /* Insert header. */ i = snprintf (rs->buf, max_size, "qXfer:%s:write:%s:%s:", object_name, annex ? annex : "", phex_nz (offset, sizeof offset)); max_size -= (i + 1); /* Escape as much data as fits into rs->buf. */ buf_len = remote_escape_output (writebuf, len, (rs->buf + i), &max_size, max_size); if (putpkt_binary (rs->buf, i + buf_len) < 0 || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0 || packet_ok (rs->buf, packet) != PACKET_OK) return -1; unpack_varlen_hex (rs->buf, &n); return n; } /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet. Data at OFFSET, of up to LEN bytes, is read into READBUF; the number of bytes read is returned, or 0 for EOF, or -1 for error. The number of bytes read may be less than LEN without indicating an EOF. PACKET is checked and updated to indicate whether the remote target supports this object. */ static LONGEST remote_read_qxfer (struct target_ops *ops, const char *object_name, const char *annex, gdb_byte *readbuf, ULONGEST offset, LONGEST len, struct packet_config *packet) { static char *finished_object; static char *finished_annex; static ULONGEST finished_offset; struct remote_state *rs = get_remote_state (); unsigned int total = 0; LONGEST i, n, packet_len; if (packet->support == PACKET_DISABLE) return -1; /* Check whether we've cached an end-of-object packet that matches this request. */ if (finished_object) { if (strcmp (object_name, finished_object) == 0 && strcmp (annex ? annex : "", finished_annex) == 0 && offset == finished_offset) return 0; /* Otherwise, we're now reading something different. Discard the cache. */ xfree (finished_object); xfree (finished_annex); finished_object = NULL; finished_annex = NULL; } /* Request only enough to fit in a single packet. The actual data may not, since we don't know how much of it will need to be escaped; the target is free to respond with slightly less data. We subtract five to account for the response type and the protocol frame. */ n = min (get_remote_packet_size () - 5, len); snprintf (rs->buf, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s", object_name, annex ? annex : "", phex_nz (offset, sizeof offset), phex_nz (n, sizeof n)); i = putpkt (rs->buf); if (i < 0) return -1; rs->buf[0] = '\0'; packet_len = getpkt_sane (&rs->buf, &rs->buf_size, 0); if (packet_len < 0 || packet_ok (rs->buf, packet) != PACKET_OK) return -1; if (rs->buf[0] != 'l' && rs->buf[0] != 'm') error (_("Unknown remote qXfer reply: %s"), rs->buf); /* 'm' means there is (or at least might be) more data after this batch. That does not make sense unless there's at least one byte of data in this reply. */ if (rs->buf[0] == 'm' && packet_len == 1) error (_("Remote qXfer reply contained no data.")); /* Got some data. */ i = remote_unescape_input (rs->buf + 1, packet_len - 1, readbuf, n); /* 'l' is an EOF marker, possibly including a final block of data, or possibly empty. If we have the final block of a non-empty object, record this fact to bypass a subsequent partial read. */ if (rs->buf[0] == 'l' && offset + i > 0) { finished_object = xstrdup (object_name); finished_annex = xstrdup (annex ? annex : ""); finished_offset = offset + i; } return i; } static LONGEST remote_xfer_partial (struct target_ops *ops, enum target_object object, const char *annex, gdb_byte *readbuf, const gdb_byte *writebuf, ULONGEST offset, LONGEST len) { struct remote_state *rs = get_remote_state (); int i; char *p2; char query_type; /* Handle memory using the standard memory routines. */ if (object == TARGET_OBJECT_MEMORY) { int xfered; errno = 0; /* If the remote target is connected but not running, we should pass this request down to a lower stratum (e.g. the executable file). */ if (!target_has_execution) return 0; if (writebuf != NULL) xfered = remote_write_bytes (offset, writebuf, len); else xfered = remote_read_bytes (offset, readbuf, len); if (xfered > 0) return xfered; else if (xfered == 0 && errno == 0) return 0; else return -1; } /* Handle SPU memory using qxfer packets. */ if (object == TARGET_OBJECT_SPU) { if (readbuf) return remote_read_qxfer (ops, "spu", annex, readbuf, offset, len, &remote_protocol_packets [PACKET_qXfer_spu_read]); else return remote_write_qxfer (ops, "spu", annex, writebuf, offset, len, &remote_protocol_packets [PACKET_qXfer_spu_write]); } /* Only handle flash writes. */ if (writebuf != NULL) { LONGEST xfered; switch (object) { case TARGET_OBJECT_FLASH: xfered = remote_flash_write (ops, offset, len, writebuf); if (xfered > 0) return xfered; else if (xfered == 0 && errno == 0) return 0; else return -1; default: return -1; } } /* Map pre-existing objects onto letters. DO NOT do this for new objects!!! Instead specify new query packets. */ switch (object) { case TARGET_OBJECT_AVR: query_type = 'R'; break; case TARGET_OBJECT_AUXV: gdb_assert (annex == NULL); return remote_read_qxfer (ops, "auxv", annex, readbuf, offset, len, &remote_protocol_packets[PACKET_qXfer_auxv]); case TARGET_OBJECT_AVAILABLE_FEATURES: return remote_read_qxfer (ops, "features", annex, readbuf, offset, len, &remote_protocol_packets[PACKET_qXfer_features]); case TARGET_OBJECT_LIBRARIES: return remote_read_qxfer (ops, "libraries", annex, readbuf, offset, len, &remote_protocol_packets[PACKET_qXfer_libraries]); case TARGET_OBJECT_MEMORY_MAP: gdb_assert (annex == NULL); return remote_read_qxfer (ops, "memory-map", annex, readbuf, offset, len, &remote_protocol_packets[PACKET_qXfer_memory_map]); default: return -1; } /* Note: a zero OFFSET and LEN can be used to query the minimum buffer size. */ if (offset == 0 && len == 0) return (get_remote_packet_size ()); /* Minimum outbuf size is get_remote_packet_size (). If LEN is not large enough let the caller deal with it. */ if (len < get_remote_packet_size ()) return -1; len = get_remote_packet_size (); /* Except for querying the minimum buffer size, target must be open. */ if (!remote_desc) error (_("remote query is only available after target open")); gdb_assert (annex != NULL); gdb_assert (readbuf != NULL); p2 = rs->buf; *p2++ = 'q'; *p2++ = query_type; /* We used one buffer char for the remote protocol q command and another for the query type. As the remote protocol encapsulation uses 4 chars plus one extra in case we are debugging (remote_debug), we have PBUFZIZ - 7 left to pack the query string. */ i = 0; while (annex[i] && (i < (get_remote_packet_size () - 8))) { /* Bad caller may have sent forbidden characters. */ gdb_assert (isprint (annex[i]) && annex[i] != '$' && annex[i] != '#'); *p2++ = annex[i]; i++; } *p2 = '\0'; gdb_assert (annex[i] == '\0'); i = putpkt (rs->buf); if (i < 0) return i; getpkt (&rs->buf, &rs->buf_size, 0); strcpy ((char *) readbuf, rs->buf); return strlen ((char *) readbuf); } static void remote_rcmd (char *command, struct ui_file *outbuf) { struct remote_state *rs = get_remote_state (); char *p = rs->buf; if (!remote_desc) error (_("remote rcmd is only available after target open")); /* Send a NULL command across as an empty command. */ if (command == NULL) command = ""; /* The query prefix. */ strcpy (rs->buf, "qRcmd,"); p = strchr (rs->buf, '\0'); if ((strlen (rs->buf) + strlen (command) * 2 + 8/*misc*/) > get_remote_packet_size ()) error (_("\"monitor\" command ``%s'' is too long."), command); /* Encode the actual command. */ bin2hex ((gdb_byte *) command, p, 0); if (putpkt (rs->buf) < 0) error (_("Communication problem with target.")); /* get/display the response */ while (1) { char *buf; /* XXX - see also tracepoint.c:remote_get_noisy_reply(). */ rs->buf[0] = '\0'; getpkt (&rs->buf, &rs->buf_size, 0); buf = rs->buf; if (buf[0] == '\0') error (_("Target does not support this command.")); if (buf[0] == 'O' && buf[1] != 'K') { remote_console_output (buf + 1); /* 'O' message from stub. */ continue; } if (strcmp (buf, "OK") == 0) break; if (strlen (buf) == 3 && buf[0] == 'E' && isdigit (buf[1]) && isdigit (buf[2])) { error (_("Protocol error with Rcmd")); } for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2) { char c = (fromhex (p[0]) << 4) + fromhex (p[1]); fputc_unfiltered (c, outbuf); } break; } } static VEC(mem_region_s) * remote_memory_map (struct target_ops *ops) { VEC(mem_region_s) *result = NULL; char *text = target_read_stralloc (¤t_target, TARGET_OBJECT_MEMORY_MAP, NULL); if (text) { struct cleanup *back_to = make_cleanup (xfree, text); result = parse_memory_map (text); do_cleanups (back_to); } return result; } static void packet_command (char *args, int from_tty) { struct remote_state *rs = get_remote_state (); if (!remote_desc) error (_("command can only be used with remote target")); if (!args) error (_("remote-packet command requires packet text as argument")); puts_filtered ("sending: "); print_packet (args); puts_filtered ("\n"); putpkt (args); getpkt (&rs->buf, &rs->buf_size, 0); puts_filtered ("received: "); print_packet (rs->buf); puts_filtered ("\n"); } #if 0 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */ static void display_thread_info (struct gdb_ext_thread_info *info); static void threadset_test_cmd (char *cmd, int tty); static void threadalive_test (char *cmd, int tty); static void threadlist_test_cmd (char *cmd, int tty); int get_and_display_threadinfo (threadref *ref); static void threadinfo_test_cmd (char *cmd, int tty); static int thread_display_step (threadref *ref, void *context); static void threadlist_update_test_cmd (char *cmd, int tty); static void init_remote_threadtests (void); #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */ static void threadset_test_cmd (char *cmd, int tty) { int sample_thread = SAMPLE_THREAD; printf_filtered (_("Remote threadset test\n")); set_thread (sample_thread, 1); } static void threadalive_test (char *cmd, int tty) { int sample_thread = SAMPLE_THREAD; if (remote_thread_alive (pid_to_ptid (sample_thread))) printf_filtered ("PASS: Thread alive test\n"); else printf_filtered ("FAIL: Thread alive test\n"); } void output_threadid (char *title, threadref *ref); void output_threadid (char *title, threadref *ref) { char hexid[20]; pack_threadid (&hexid[0], ref); /* Convert threead id into hex. */ hexid[16] = 0; printf_filtered ("%s %s\n", title, (&hexid[0])); } static void threadlist_test_cmd (char *cmd, int tty) { int startflag = 1; threadref nextthread; int done, result_count; threadref threadlist[3]; printf_filtered ("Remote Threadlist test\n"); if (!remote_get_threadlist (startflag, &nextthread, 3, &done, &result_count, &threadlist[0])) printf_filtered ("FAIL: threadlist test\n"); else { threadref *scan = threadlist; threadref *limit = scan + result_count; while (scan < limit) output_threadid (" thread ", scan++); } } void display_thread_info (struct gdb_ext_thread_info *info) { output_threadid ("Threadid: ", &info->threadid); printf_filtered ("Name: %s\n ", info->shortname); printf_filtered ("State: %s\n", info->display); printf_filtered ("other: %s\n\n", info->more_display); } int get_and_display_threadinfo (threadref *ref) { int result; int set; struct gdb_ext_thread_info threadinfo; set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME | TAG_MOREDISPLAY | TAG_DISPLAY; if (0 != (result = remote_get_threadinfo (ref, set, &threadinfo))) display_thread_info (&threadinfo); return result; } static void threadinfo_test_cmd (char *cmd, int tty) { int athread = SAMPLE_THREAD; threadref thread; int set; int_to_threadref (&thread, athread); printf_filtered ("Remote Threadinfo test\n"); if (!get_and_display_threadinfo (&thread)) printf_filtered ("FAIL cannot get thread info\n"); } static int thread_display_step (threadref *ref, void *context) { /* output_threadid(" threadstep ",ref); *//* simple test */ return get_and_display_threadinfo (ref); } static void threadlist_update_test_cmd (char *cmd, int tty) { printf_filtered ("Remote Threadlist update test\n"); remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS); } static void init_remote_threadtests (void) { add_com ("tlist", class_obscure, threadlist_test_cmd, _("\ Fetch and print the remote list of thread identifiers, one pkt only")); add_com ("tinfo", class_obscure, threadinfo_test_cmd, _("Fetch and display info about one thread")); add_com ("tset", class_obscure, threadset_test_cmd, _("Test setting to a different thread")); add_com ("tupd", class_obscure, threadlist_update_test_cmd, _("Iterate through updating all remote thread info")); add_com ("talive", class_obscure, threadalive_test, _(" Remote thread alive test ")); } #endif /* 0 */ /* Convert a thread ID to a string. Returns the string in a static buffer. */ static char * remote_pid_to_str (ptid_t ptid) { static char buf[32]; xsnprintf (buf, sizeof buf, "Thread %d", ptid_get_pid (ptid)); return buf; } /* Get the address of the thread local variable in OBJFILE which is stored at OFFSET within the thread local storage for thread PTID. */ static CORE_ADDR remote_get_thread_local_address (ptid_t ptid, CORE_ADDR lm, CORE_ADDR offset) { if (remote_protocol_packets[PACKET_qGetTLSAddr].support != PACKET_DISABLE) { struct remote_state *rs = get_remote_state (); char *p = rs->buf; enum packet_result result; strcpy (p, "qGetTLSAddr:"); p += strlen (p); p += hexnumstr (p, PIDGET (ptid)); *p++ = ','; p += hexnumstr (p, offset); *p++ = ','; p += hexnumstr (p, lm); *p++ = '\0'; putpkt (rs->buf); getpkt (&rs->buf, &rs->buf_size, 0); result = packet_ok (rs->buf, &remote_protocol_packets[PACKET_qGetTLSAddr]); if (result == PACKET_OK) { ULONGEST result; unpack_varlen_hex (rs->buf, &result); return result; } else if (result == PACKET_UNKNOWN) throw_error (TLS_GENERIC_ERROR, _("Remote target doesn't support qGetTLSAddr packet")); else throw_error (TLS_GENERIC_ERROR, _("Remote target failed to process qGetTLSAddr request")); } else throw_error (TLS_GENERIC_ERROR, _("TLS not supported or disabled on this target")); /* Not reached. */ return 0; } /* Support for inferring a target description based on the current architecture and the size of a 'g' packet. While the 'g' packet can have any size (since optional registers can be left off the end), some sizes are easily recognizable given knowledge of the approximate architecture. */ struct remote_g_packet_guess { int bytes; const struct target_desc *tdesc; }; typedef struct remote_g_packet_guess remote_g_packet_guess_s; DEF_VEC_O(remote_g_packet_guess_s); struct remote_g_packet_data { VEC(remote_g_packet_guess_s) *guesses; }; static struct gdbarch_data *remote_g_packet_data_handle; static void * remote_g_packet_data_init (struct obstack *obstack) { return OBSTACK_ZALLOC (obstack, struct remote_g_packet_data); } void register_remote_g_packet_guess (struct gdbarch *gdbarch, int bytes, const struct target_desc *tdesc) { struct remote_g_packet_data *data = gdbarch_data (gdbarch, remote_g_packet_data_handle); struct remote_g_packet_guess new_guess, *guess; int ix; gdb_assert (tdesc != NULL); for (ix = 0; VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess); ix++) if (guess->bytes == bytes) internal_error (__FILE__, __LINE__, "Duplicate g packet description added for size %d", bytes); new_guess.bytes = bytes; new_guess.tdesc = tdesc; VEC_safe_push (remote_g_packet_guess_s, data->guesses, &new_guess); } static const struct target_desc * remote_read_description (struct target_ops *target) { struct remote_g_packet_data *data = gdbarch_data (current_gdbarch, remote_g_packet_data_handle); if (!VEC_empty (remote_g_packet_guess_s, data->guesses)) { struct remote_g_packet_guess *guess; int ix; int bytes = send_g_packet (); for (ix = 0; VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess); ix++) if (guess->bytes == bytes) return guess->tdesc; /* We discard the g packet. A minor optimization would be to hold on to it, and fill the register cache once we have selected an architecture, but it's too tricky to do safely. */ } return NULL; } /* Remote file transfer support. This is host-initiated I/O, not target-initiated; for target-initiated, see remote-fileio.c. */ /* If *LEFT is at least the length of STRING, copy STRING to *BUFFER, update *BUFFER to point to the new end of the buffer, and decrease *LEFT. Otherwise raise an error. */ static void remote_buffer_add_string (char **buffer, int *left, char *string) { int len = strlen (string); if (len > *left) error (_("Packet too long for target.")); memcpy (*buffer, string, len); *buffer += len; *left -= len; /* NUL-terminate the buffer as a convenience, if there is room. */ if (*left) **buffer = '\0'; } /* If *LEFT is large enough, hex encode LEN bytes from BYTES into *BUFFER, update *BUFFER to point to the new end of the buffer, and decrease *LEFT. Otherwise raise an error. */ static void remote_buffer_add_bytes (char **buffer, int *left, const gdb_byte *bytes, int len) { if (2 * len > *left) error (_("Packet too long for target.")); bin2hex (bytes, *buffer, len); *buffer += 2 * len; *left -= 2 * len; /* NUL-terminate the buffer as a convenience, if there is room. */ if (*left) **buffer = '\0'; } /* If *LEFT is large enough, convert VALUE to hex and add it to *BUFFER, update *BUFFER to point to the new end of the buffer, and decrease *LEFT. Otherwise raise an error. */ static void remote_buffer_add_int (char **buffer, int *left, ULONGEST value) { int len = hexnumlen (value); if (len > *left) error (_("Packet too long for target.")); hexnumstr (*buffer, value); *buffer += len; *left -= len; /* NUL-terminate the buffer as a convenience, if there is room. */ if (*left) **buffer = '\0'; } /* Parse an I/O result packet from BUFFER. Set RETCODE to the return value, *REMOTE_ERRNO to the remote error number or zero if none was included, and *ATTACHMENT to point to the start of the annex if any. The length of the packet isn't needed here; there may be NUL bytes in BUFFER, but they will be after *ATTACHMENT. Return 0 if the packet could be parsed, -1 if it could not. If -1 is returned, the other variables may not be initialized. */ static int remote_hostio_parse_result (char *buffer, int *retcode, int *remote_errno, char **attachment) { char *p, *p2; *remote_errno = 0; *attachment = NULL; if (buffer[0] != 'F') return -1; errno = 0; *retcode = strtol (&buffer[1], &p, 16); if (errno != 0 || p == &buffer[1]) return -1; /* Check for ",errno". */ if (*p == ',') { errno = 0; *remote_errno = strtol (p + 1, &p2, 16); if (errno != 0 || p + 1 == p2) return -1; p = p2; } /* Check for ";attachment". If there is no attachment, the packet should end here. */ if (*p == ';') { *attachment = p + 1; return 0; } else if (*p == '\0') return 0; else return -1; } /* Send a prepared I/O packet to the target and read its response. The prepared packet is in the global RS->BUF before this function is called, and the answer is there when we return. COMMAND_BYTES is the length of the request to send, which may include binary data. WHICH_PACKET is the packet configuration to check before attempting a packet. If an error occurs, *REMOTE_ERRNO is set to the error number and -1 is returned. Otherwise the value returned by the function is returned. ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an attachment is expected; an error will be reported if there's a mismatch. If one is found, *ATTACHMENT will be set to point into the packet buffer and *ATTACHMENT_LEN will be set to the attachment's length. */ static int remote_hostio_send_command (int command_bytes, int which_packet, int *remote_errno, char **attachment, int *attachment_len) { struct remote_state *rs = get_remote_state (); int ret, bytes_read; char *attachment_tmp; if (remote_protocol_packets[which_packet].support == PACKET_DISABLE) { *remote_errno = FILEIO_ENOSYS; return -1; } putpkt_binary (rs->buf, command_bytes); bytes_read = getpkt_sane (&rs->buf, &rs->buf_size, 0); /* If it timed out, something is wrong. Don't try to parse the buffer. */ if (bytes_read < 0) { *remote_errno = FILEIO_EINVAL; return -1; } switch (packet_ok (rs->buf, &remote_protocol_packets[which_packet])) { case PACKET_ERROR: *remote_errno = FILEIO_EINVAL; return -1; case PACKET_UNKNOWN: *remote_errno = FILEIO_ENOSYS; return -1; case PACKET_OK: break; } if (remote_hostio_parse_result (rs->buf, &ret, remote_errno, &attachment_tmp)) { *remote_errno = FILEIO_EINVAL; return -1; } /* Make sure we saw an attachment if and only if we expected one. */ if ((attachment_tmp == NULL && attachment != NULL) || (attachment_tmp != NULL && attachment == NULL)) { *remote_errno = FILEIO_EINVAL; return -1; } /* If an attachment was found, it must point into the packet buffer; work out how many bytes there were. */ if (attachment_tmp != NULL) { *attachment = attachment_tmp; *attachment_len = bytes_read - (*attachment - rs->buf); } return ret; } /* Open FILENAME on the remote target, using FLAGS and MODE. Return a remote file descriptor, or -1 if an error occurs (and set *REMOTE_ERRNO). */ static int remote_hostio_open (const char *filename, int flags, int mode, int *remote_errno) { struct remote_state *rs = get_remote_state (); char *p = rs->buf; int left = get_remote_packet_size () - 1; remote_buffer_add_string (&p, &left, "vFile:open:"); remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename, strlen (filename)); remote_buffer_add_string (&p, &left, ","); remote_buffer_add_int (&p, &left, flags); remote_buffer_add_string (&p, &left, ","); remote_buffer_add_int (&p, &left, mode); return remote_hostio_send_command (p - rs->buf, PACKET_vFile_open, remote_errno, NULL, NULL); } /* Write up to LEN bytes from WRITE_BUF to FD on the remote target. Return the number of bytes written, or -1 if an error occurs (and set *REMOTE_ERRNO). */ static int remote_hostio_pwrite (int fd, const gdb_byte *write_buf, int len, ULONGEST offset, int *remote_errno) { struct remote_state *rs = get_remote_state (); char *p = rs->buf; int left = get_remote_packet_size (); int out_len; remote_buffer_add_string (&p, &left, "vFile:pwrite:"); remote_buffer_add_int (&p, &left, fd); remote_buffer_add_string (&p, &left, ","); remote_buffer_add_int (&p, &left, offset); remote_buffer_add_string (&p, &left, ","); p += remote_escape_output (write_buf, len, p, &out_len, get_remote_packet_size () - (p - rs->buf)); return remote_hostio_send_command (p - rs->buf, PACKET_vFile_pwrite, remote_errno, NULL, NULL); } /* Read up to LEN bytes FD on the remote target into READ_BUF Return the number of bytes read, or -1 if an error occurs (and set *REMOTE_ERRNO). */ static int remote_hostio_pread (int fd, gdb_byte *read_buf, int len, ULONGEST offset, int *remote_errno) { struct remote_state *rs = get_remote_state (); char *p = rs->buf; char *attachment; int left = get_remote_packet_size (); int ret, attachment_len; int read_len; remote_buffer_add_string (&p, &left, "vFile:pread:"); remote_buffer_add_int (&p, &left, fd); remote_buffer_add_string (&p, &left, ","); remote_buffer_add_int (&p, &left, len); remote_buffer_add_string (&p, &left, ","); remote_buffer_add_int (&p, &left, offset); ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_pread, remote_errno, &attachment, &attachment_len); if (ret < 0) return ret; read_len = remote_unescape_input (attachment, attachment_len, read_buf, len); if (read_len != ret) error (_("Read returned %d, but %d bytes."), ret, (int) read_len); return ret; } /* Close FD on the remote target. Return 0, or -1 if an error occurs (and set *REMOTE_ERRNO). */ static int remote_hostio_close (int fd, int *remote_errno) { struct remote_state *rs = get_remote_state (); char *p = rs->buf; int left = get_remote_packet_size () - 1; remote_buffer_add_string (&p, &left, "vFile:close:"); remote_buffer_add_int (&p, &left, fd); return remote_hostio_send_command (p - rs->buf, PACKET_vFile_close, remote_errno, NULL, NULL); } /* Unlink FILENAME on the remote target. Return 0, or -1 if an error occurs (and set *REMOTE_ERRNO). */ static int remote_hostio_unlink (const char *filename, int *remote_errno) { struct remote_state *rs = get_remote_state (); char *p = rs->buf; int left = get_remote_packet_size () - 1; remote_buffer_add_string (&p, &left, "vFile:unlink:"); remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename, strlen (filename)); return remote_hostio_send_command (p - rs->buf, PACKET_vFile_unlink, remote_errno, NULL, NULL); } static int remote_fileio_errno_to_host (int errnum) { switch (errnum) { case FILEIO_EPERM: return EPERM; case FILEIO_ENOENT: return ENOENT; case FILEIO_EINTR: return EINTR; case FILEIO_EIO: return EIO; case FILEIO_EBADF: return EBADF; case FILEIO_EACCES: return EACCES; case FILEIO_EFAULT: return EFAULT; case FILEIO_EBUSY: return EBUSY; case FILEIO_EEXIST: return EEXIST; case FILEIO_ENODEV: return ENODEV; case FILEIO_ENOTDIR: return ENOTDIR; case FILEIO_EISDIR: return EISDIR; case FILEIO_EINVAL: return EINVAL; case FILEIO_ENFILE: return ENFILE; case FILEIO_EMFILE: return EMFILE; case FILEIO_EFBIG: return EFBIG; case FILEIO_ENOSPC: return ENOSPC; case FILEIO_ESPIPE: return ESPIPE; case FILEIO_EROFS: return EROFS; case FILEIO_ENOSYS: return ENOSYS; case FILEIO_ENAMETOOLONG: return ENAMETOOLONG; } return -1; } static char * remote_hostio_error (int errnum) { int host_error = remote_fileio_errno_to_host (errnum); if (host_error == -1) error (_("Unknown remote I/O error %d"), errnum); else error (_("Remote I/O error: %s"), safe_strerror (host_error)); } static void fclose_cleanup (void *file) { fclose (file); } static void remote_hostio_close_cleanup (void *opaque) { int fd = *(int *) opaque; int remote_errno; remote_hostio_close (fd, &remote_errno); } void remote_file_put (const char *local_file, const char *remote_file, int from_tty) { struct cleanup *back_to, *close_cleanup; int retcode, fd, remote_errno, bytes, io_size; FILE *file; gdb_byte *buffer; int bytes_in_buffer; int saw_eof; ULONGEST offset; if (!remote_desc) error (_("command can only be used with remote target")); file = fopen (local_file, "rb"); if (file == NULL) perror_with_name (local_file); back_to = make_cleanup (fclose_cleanup, file); fd = remote_hostio_open (remote_file, (FILEIO_O_WRONLY | FILEIO_O_CREAT | FILEIO_O_TRUNC), 0700, &remote_errno); if (fd == -1) remote_hostio_error (remote_errno); /* Send up to this many bytes at once. They won't all fit in the remote packet limit, so we'll transfer slightly fewer. */ io_size = get_remote_packet_size (); buffer = xmalloc (io_size); make_cleanup (xfree, buffer); close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd); bytes_in_buffer = 0; saw_eof = 0; offset = 0; while (bytes_in_buffer || !saw_eof) { if (!saw_eof) { bytes = fread (buffer + bytes_in_buffer, 1, io_size - bytes_in_buffer, file); if (bytes == 0) { if (ferror (file)) error (_("Error reading %s."), local_file); else { /* EOF. Unless there is something still in the buffer from the last iteration, we are done. */ saw_eof = 1; if (bytes_in_buffer == 0) break; } } } else bytes = 0; bytes += bytes_in_buffer; bytes_in_buffer = 0; retcode = remote_hostio_pwrite (fd, buffer, bytes, offset, &remote_errno); if (retcode < 0) remote_hostio_error (remote_errno); else if (retcode == 0) error (_("Remote write of %d bytes returned 0!"), bytes); else if (retcode < bytes) { /* Short write. Save the rest of the read data for the next write. */ bytes_in_buffer = bytes - retcode; memmove (buffer, buffer + retcode, bytes_in_buffer); } offset += retcode; } discard_cleanups (close_cleanup); if (remote_hostio_close (fd, &remote_errno)) remote_hostio_error (remote_errno); if (from_tty) printf_filtered (_("Successfully sent file \"%s\".\n"), local_file); do_cleanups (back_to); } void remote_file_get (const char *remote_file, const char *local_file, int from_tty) { struct cleanup *back_to, *close_cleanup; int retcode, fd, remote_errno, bytes, io_size; FILE *file; gdb_byte *buffer; ULONGEST offset; if (!remote_desc) error (_("command can only be used with remote target")); fd = remote_hostio_open (remote_file, FILEIO_O_RDONLY, 0, &remote_errno); if (fd == -1) remote_hostio_error (remote_errno); file = fopen (local_file, "wb"); if (file == NULL) perror_with_name (local_file); back_to = make_cleanup (fclose_cleanup, file); /* Send up to this many bytes at once. They won't all fit in the remote packet limit, so we'll transfer slightly fewer. */ io_size = get_remote_packet_size (); buffer = xmalloc (io_size); make_cleanup (xfree, buffer); close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd); offset = 0; while (1) { bytes = remote_hostio_pread (fd, buffer, io_size, offset, &remote_errno); if (bytes == 0) /* Success, but no bytes, means end-of-file. */ break; if (bytes == -1) remote_hostio_error (remote_errno); offset += bytes; bytes = fwrite (buffer, 1, bytes, file); if (bytes == 0) perror_with_name (local_file); } discard_cleanups (close_cleanup); if (remote_hostio_close (fd, &remote_errno)) remote_hostio_error (remote_errno); if (from_tty) printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file); do_cleanups (back_to); } void remote_file_delete (const char *remote_file, int from_tty) { int retcode, remote_errno; if (!remote_desc) error (_("command can only be used with remote target")); retcode = remote_hostio_unlink (remote_file, &remote_errno); if (retcode == -1) remote_hostio_error (remote_errno); if (from_tty) printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file); } static void remote_put_command (char *args, int from_tty) { struct cleanup *back_to; char **argv; argv = buildargv (args); if (argv == NULL) nomem (0); back_to = make_cleanup_freeargv (argv); if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL) error (_("Invalid parameters to remote put")); remote_file_put (argv[0], argv[1], from_tty); do_cleanups (back_to); } static void remote_get_command (char *args, int from_tty) { struct cleanup *back_to; char **argv; argv = buildargv (args); if (argv == NULL) nomem (0); back_to = make_cleanup_freeargv (argv); if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL) error (_("Invalid parameters to remote get")); remote_file_get (argv[0], argv[1], from_tty); do_cleanups (back_to); } static void remote_delete_command (char *args, int from_tty) { struct cleanup *back_to; char **argv; argv = buildargv (args); if (argv == NULL) nomem (0); back_to = make_cleanup_freeargv (argv); if (argv[0] == NULL || argv[1] != NULL) error (_("Invalid parameters to remote delete")); remote_file_delete (argv[0], from_tty); do_cleanups (back_to); } static void remote_command (char *args, int from_tty) { help_list (remote_cmdlist, "remote ", -1, gdb_stdout); } static void init_remote_ops (void) { remote_ops.to_shortname = "remote"; remote_ops.to_longname = "Remote serial target in gdb-specific protocol"; remote_ops.to_doc = "Use a remote computer via a serial line, using a gdb-specific protocol.\n\ Specify the serial device it is connected to\n\ (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."; remote_ops.to_open = remote_open; remote_ops.to_close = remote_close; remote_ops.to_detach = remote_detach; remote_ops.to_disconnect = remote_disconnect; remote_ops.to_resume = remote_resume; remote_ops.to_wait = remote_wait; remote_ops.to_fetch_registers = remote_fetch_registers; remote_ops.to_store_registers = remote_store_registers; remote_ops.to_prepare_to_store = remote_prepare_to_store; remote_ops.deprecated_xfer_memory = remote_xfer_memory; remote_ops.to_files_info = remote_files_info; remote_ops.to_insert_breakpoint = remote_insert_breakpoint; remote_ops.to_remove_breakpoint = remote_remove_breakpoint; remote_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint; remote_ops.to_stopped_data_address = remote_stopped_data_address; remote_ops.to_can_use_hw_breakpoint = remote_check_watch_resources; remote_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint; remote_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint; remote_ops.to_insert_watchpoint = remote_insert_watchpoint; remote_ops.to_remove_watchpoint = remote_remove_watchpoint; remote_ops.to_kill = remote_kill; remote_ops.to_load = generic_load; remote_ops.to_mourn_inferior = remote_mourn; remote_ops.to_thread_alive = remote_thread_alive; remote_ops.to_find_new_threads = remote_threads_info; remote_ops.to_pid_to_str = remote_pid_to_str; remote_ops.to_extra_thread_info = remote_threads_extra_info; remote_ops.to_stop = remote_stop; remote_ops.to_xfer_partial = remote_xfer_partial; remote_ops.to_rcmd = remote_rcmd; remote_ops.to_log_command = serial_log_command; remote_ops.to_get_thread_local_address = remote_get_thread_local_address; remote_ops.to_stratum = process_stratum; remote_ops.to_has_all_memory = 1; remote_ops.to_has_memory = 1; remote_ops.to_has_stack = 1; remote_ops.to_has_registers = 1; remote_ops.to_has_execution = 1; remote_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */ remote_ops.to_magic = OPS_MAGIC; remote_ops.to_memory_map = remote_memory_map; remote_ops.to_flash_erase = remote_flash_erase; remote_ops.to_flash_done = remote_flash_done; remote_ops.to_read_description = remote_read_description; } /* Set up the extended remote vector by making a copy of the standard remote vector and adding to it. */ static void init_extended_remote_ops (void) { extended_remote_ops = remote_ops; extended_remote_ops.to_shortname = "extended-remote"; extended_remote_ops.to_longname = "Extended remote serial target in gdb-specific protocol"; extended_remote_ops.to_doc = "Use a remote computer via a serial line, using a gdb-specific protocol.\n\ Specify the serial device it is connected to (e.g. /dev/ttya).", extended_remote_ops.to_open = extended_remote_open; extended_remote_ops.to_create_inferior = extended_remote_create_inferior; extended_remote_ops.to_mourn_inferior = extended_remote_mourn; extended_remote_ops.to_detach = extended_remote_detach; extended_remote_ops.to_attach = extended_remote_attach; } static int remote_can_async_p (void) { /* We're async whenever the serial device is. */ return (current_target.to_async_mask_value) && serial_can_async_p (remote_desc); } static int remote_is_async_p (void) { /* We're async whenever the serial device is. */ return (current_target.to_async_mask_value) && serial_is_async_p (remote_desc); } /* Pass the SERIAL event on and up to the client. One day this code will be able to delay notifying the client of an event until the point where an entire packet has been received. */ static void (*async_client_callback) (enum inferior_event_type event_type, void *context); static void *async_client_context; static serial_event_ftype remote_async_serial_handler; static void remote_async_serial_handler (struct serial *scb, void *context) { /* Don't propogate error information up to the client. Instead let the client find out about the error by querying the target. */ async_client_callback (INF_REG_EVENT, async_client_context); } static void remote_async (void (*callback) (enum inferior_event_type event_type, void *context), void *context) { if (current_target.to_async_mask_value == 0) internal_error (__FILE__, __LINE__, _("Calling remote_async when async is masked")); if (callback != NULL) { serial_async (remote_desc, remote_async_serial_handler, NULL); async_client_callback = callback; async_client_context = context; } else serial_async (remote_desc, NULL, NULL); } /* Target async and target extended-async. This are temporary targets, until it is all tested. Eventually async support will be incorporated int the usual 'remote' target. */ static void init_remote_async_ops (void) { remote_async_ops.to_shortname = "async"; remote_async_ops.to_longname = "Remote serial target in async version of the gdb-specific protocol"; remote_async_ops.to_doc = "Use a remote computer via a serial line, using a gdb-specific protocol.\n\ Specify the serial device it is connected to (e.g. /dev/ttya)."; remote_async_ops.to_open = remote_async_open; remote_async_ops.to_close = remote_close; remote_async_ops.to_detach = remote_detach; remote_async_ops.to_disconnect = remote_disconnect; remote_async_ops.to_resume = remote_async_resume; remote_async_ops.to_wait = remote_async_wait; remote_async_ops.to_fetch_registers = remote_fetch_registers; remote_async_ops.to_store_registers = remote_store_registers; remote_async_ops.to_prepare_to_store = remote_prepare_to_store; remote_async_ops.deprecated_xfer_memory = remote_xfer_memory; remote_async_ops.to_files_info = remote_files_info; remote_async_ops.to_insert_breakpoint = remote_insert_breakpoint; remote_async_ops.to_remove_breakpoint = remote_remove_breakpoint; remote_async_ops.to_can_use_hw_breakpoint = remote_check_watch_resources; remote_async_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint; remote_async_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint; remote_async_ops.to_insert_watchpoint = remote_insert_watchpoint; remote_async_ops.to_remove_watchpoint = remote_remove_watchpoint; remote_async_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint; remote_async_ops.to_stopped_data_address = remote_stopped_data_address; remote_async_ops.to_terminal_inferior = remote_async_terminal_inferior; remote_async_ops.to_terminal_ours = remote_async_terminal_ours; remote_async_ops.to_kill = remote_async_kill; remote_async_ops.to_load = generic_load; remote_async_ops.to_mourn_inferior = remote_async_mourn; remote_async_ops.to_thread_alive = remote_thread_alive; remote_async_ops.to_find_new_threads = remote_threads_info; remote_async_ops.to_pid_to_str = remote_pid_to_str; remote_async_ops.to_extra_thread_info = remote_threads_extra_info; remote_async_ops.to_stop = remote_stop; remote_async_ops.to_xfer_partial = remote_xfer_partial; remote_async_ops.to_rcmd = remote_rcmd; remote_async_ops.to_stratum = process_stratum; remote_async_ops.to_has_all_memory = 1; remote_async_ops.to_has_memory = 1; remote_async_ops.to_has_stack = 1; remote_async_ops.to_has_registers = 1; remote_async_ops.to_has_execution = 1; remote_async_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */ remote_async_ops.to_can_async_p = remote_can_async_p; remote_async_ops.to_is_async_p = remote_is_async_p; remote_async_ops.to_async = remote_async; remote_async_ops.to_async_mask_value = 1; remote_async_ops.to_magic = OPS_MAGIC; remote_async_ops.to_memory_map = remote_memory_map; remote_async_ops.to_flash_erase = remote_flash_erase; remote_async_ops.to_flash_done = remote_flash_done; remote_async_ops.to_read_description = remote_read_description; } /* Set up the async extended remote vector by making a copy of the standard remote vector and adding to it. */ static void init_extended_async_remote_ops (void) { extended_async_remote_ops = remote_async_ops; extended_async_remote_ops.to_shortname = "extended-async"; extended_async_remote_ops.to_longname = "Extended remote serial target in async gdb-specific protocol"; extended_async_remote_ops.to_doc = "Use a remote computer via a serial line, using an async gdb-specific protocol.\n\ Specify the serial device it is connected to (e.g. /dev/ttya).", extended_async_remote_ops.to_open = extended_remote_async_open; extended_async_remote_ops.to_create_inferior = extended_remote_async_create_inferior; extended_async_remote_ops.to_mourn_inferior = extended_async_remote_mourn; extended_async_remote_ops.to_detach = extended_remote_detach; extended_async_remote_ops.to_attach = extended_async_remote_attach; } static void set_remote_cmd (char *args, int from_tty) { help_list (remote_set_cmdlist, "set remote ", -1, gdb_stdout); } static void show_remote_cmd (char *args, int from_tty) { /* We can't just use cmd_show_list here, because we want to skip the redundant "show remote Z-packet" and the legacy aliases. */ struct cleanup *showlist_chain; struct cmd_list_element *list = remote_show_cmdlist; showlist_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "showlist"); for (; list != NULL; list = list->next) if (strcmp (list->name, "Z-packet") == 0) continue; else if (list->type == not_set_cmd) /* Alias commands are exactly like the original, except they don't have the normal type. */ continue; else { struct cleanup *option_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "option"); ui_out_field_string (uiout, "name", list->name); ui_out_text (uiout, ": "); if (list->type == show_cmd) do_setshow_command ((char *) NULL, from_tty, list); else cmd_func (list, NULL, from_tty); /* Close the tuple. */ do_cleanups (option_chain); } /* Close the tuple. */ do_cleanups (showlist_chain); } /* Function to be called whenever a new objfile (shlib) is detected. */ static void remote_new_objfile (struct objfile *objfile) { if (remote_desc != 0) /* Have a remote connection. */ remote_check_symbols (objfile); } void _initialize_remote (void) { struct remote_state *rs; /* architecture specific data */ remote_gdbarch_data_handle = gdbarch_data_register_post_init (init_remote_state); remote_g_packet_data_handle = gdbarch_data_register_pre_init (remote_g_packet_data_init); /* Initialize the per-target state. At the moment there is only one of these, not one per target. Only one target is active at a time. The default buffer size is unimportant; it will be expanded whenever a larger buffer is needed. */ rs = get_remote_state_raw (); rs->buf_size = 400; rs->buf = xmalloc (rs->buf_size); init_remote_ops (); add_target (&remote_ops); init_extended_remote_ops (); add_target (&extended_remote_ops); init_remote_async_ops (); add_target (&remote_async_ops); init_extended_async_remote_ops (); add_target (&extended_async_remote_ops); /* Hook into new objfile notification. */ observer_attach_new_objfile (remote_new_objfile); #if 0 init_remote_threadtests (); #endif /* set/show remote ... */ add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, _("\ Remote protocol specific variables\n\ Configure various remote-protocol specific variables such as\n\ the packets being used"), &remote_set_cmdlist, "set remote ", 0 /* allow-unknown */, &setlist); add_prefix_cmd ("remote", class_maintenance, show_remote_cmd, _("\ Remote protocol specific variables\n\ Configure various remote-protocol specific variables such as\n\ the packets being used"), &remote_show_cmdlist, "show remote ", 0 /* allow-unknown */, &showlist); add_cmd ("compare-sections", class_obscure, compare_sections_command, _("\ Compare section data on target to the exec file.\n\ Argument is a single section name (default: all loaded sections)."), &cmdlist); add_cmd ("packet", class_maintenance, packet_command, _("\ Send an arbitrary packet to a remote target.\n\ maintenance packet TEXT\n\ If GDB is talking to an inferior via the GDB serial protocol, then\n\ this command sends the string TEXT to the inferior, and displays the\n\ response packet. GDB supplies the initial `$' character, and the\n\ terminating `#' character and checksum."), &maintenancelist); add_setshow_boolean_cmd ("remotebreak", no_class, &remote_break, _("\ Set whether to send break if interrupted."), _("\ Show whether to send break if interrupted."), _("\ If set, a break, instead of a cntrl-c, is sent to the remote target."), NULL, NULL, /* FIXME: i18n: Whether to send break if interrupted is %s. */ &setlist, &showlist); /* Install commands for configuring memory read/write packets. */ add_cmd ("remotewritesize", no_class, set_memory_write_packet_size, _("\ Set the maximum number of bytes per memory write packet (deprecated)."), &setlist); add_cmd ("remotewritesize", no_class, show_memory_write_packet_size, _("\ Show the maximum number of bytes per memory write packet (deprecated)."), &showlist); add_cmd ("memory-write-packet-size", no_class, set_memory_write_packet_size, _("\ Set the maximum number of bytes per memory-write packet.\n\ Specify the number of bytes in a packet or 0 (zero) for the\n\ default packet size. The actual limit is further reduced\n\ dependent on the target. Specify ``fixed'' to disable the\n\ further restriction and ``limit'' to enable that restriction."), &remote_set_cmdlist); add_cmd ("memory-read-packet-size", no_class, set_memory_read_packet_size, _("\ Set the maximum number of bytes per memory-read packet.\n\ Specify the number of bytes in a packet or 0 (zero) for the\n\ default packet size. The actual limit is further reduced\n\ dependent on the target. Specify ``fixed'' to disable the\n\ further restriction and ``limit'' to enable that restriction."), &remote_set_cmdlist); add_cmd ("memory-write-packet-size", no_class, show_memory_write_packet_size, _("Show the maximum number of bytes per memory-write packet."), &remote_show_cmdlist); add_cmd ("memory-read-packet-size", no_class, show_memory_read_packet_size, _("Show the maximum number of bytes per memory-read packet."), &remote_show_cmdlist); add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class, &remote_hw_watchpoint_limit, _("\ Set the maximum number of target hardware watchpoints."), _("\ Show the maximum number of target hardware watchpoints."), _("\ Specify a negative limit for unlimited."), NULL, NULL, /* FIXME: i18n: The maximum number of target hardware watchpoints is %s. */ &remote_set_cmdlist, &remote_show_cmdlist); add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class, &remote_hw_breakpoint_limit, _("\ Set the maximum number of target hardware breakpoints."), _("\ Show the maximum number of target hardware breakpoints."), _("\ Specify a negative limit for unlimited."), NULL, NULL, /* FIXME: i18n: The maximum number of target hardware breakpoints is %s. */ &remote_set_cmdlist, &remote_show_cmdlist); add_setshow_integer_cmd ("remoteaddresssize", class_obscure, &remote_address_size, _("\ Set the maximum size of the address (in bits) in a memory packet."), _("\ Show the maximum size of the address (in bits) in a memory packet."), NULL, NULL, NULL, /* FIXME: i18n: */ &setlist, &showlist); add_packet_config_cmd (&remote_protocol_packets[PACKET_X], "X", "binary-download", 1); add_packet_config_cmd (&remote_protocol_packets[PACKET_vCont], "vCont", "verbose-resume", 0); add_packet_config_cmd (&remote_protocol_packets[PACKET_QPassSignals], "QPassSignals", "pass-signals", 0); add_packet_config_cmd (&remote_protocol_packets[PACKET_qSymbol], "qSymbol", "symbol-lookup", 0); add_packet_config_cmd (&remote_protocol_packets[PACKET_P], "P", "set-register", 1); add_packet_config_cmd (&remote_protocol_packets[PACKET_p], "p", "fetch-register", 1); add_packet_config_cmd (&remote_protocol_packets[PACKET_Z0], "Z0", "software-breakpoint", 0); add_packet_config_cmd (&remote_protocol_packets[PACKET_Z1], "Z1", "hardware-breakpoint", 0); add_packet_config_cmd (&remote_protocol_packets[PACKET_Z2], "Z2", "write-watchpoint", 0); add_packet_config_cmd (&remote_protocol_packets[PACKET_Z3], "Z3", "read-watchpoint", 0); add_packet_config_cmd (&remote_protocol_packets[PACKET_Z4], "Z4", "access-watchpoint", 0); add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_auxv], "qXfer:auxv:read", "read-aux-vector", 0); add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_features], "qXfer:features:read", "target-features", 0); add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries], "qXfer:libraries:read", "library-info", 0); add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_memory_map], "qXfer:memory-map:read", "memory-map", 0); add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_read], "qXfer:spu:read", "read-spu-object", 0); add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_write], "qXfer:spu:write", "write-spu-object", 0); add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTLSAddr], "qGetTLSAddr", "get-thread-local-storage-address", 0); add_packet_config_cmd (&remote_protocol_packets[PACKET_qSupported], "qSupported", "supported-packets", 0); add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_open], "vFile:open", "hostio-open", 0); add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pread], "vFile:pread", "hostio-pread", 0); add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pwrite], "vFile:pwrite", "hostio-pwrite", 0); add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_close], "vFile:close", "hostio-close", 0); add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_unlink], "vFile:unlink", "hostio-unlink", 0); add_packet_config_cmd (&remote_protocol_packets[PACKET_vAttach], "vAttach", "attach", 0); add_packet_config_cmd (&remote_protocol_packets[PACKET_vRun], "vRun", "run", 0); /* Keep the old ``set remote Z-packet ...'' working. Each individual Z sub-packet has its own set and show commands, but users may have sets to this variable in their .gdbinit files (or in their documentation). */ add_setshow_auto_boolean_cmd ("Z-packet", class_obscure, &remote_Z_packet_detect, _("\ Set use of remote protocol `Z' packets"), _("\ Show use of remote protocol `Z' packets "), _("\ When set, GDB will attempt to use the remote breakpoint and watchpoint\n\ packets."), set_remote_protocol_Z_packet_cmd, show_remote_protocol_Z_packet_cmd, /* FIXME: i18n: Use of remote protocol `Z' packets is %s. */ &remote_set_cmdlist, &remote_show_cmdlist); add_prefix_cmd ("remote", class_files, remote_command, _("\ Manipulate files on the remote system\n\ Transfer files to and from the remote target system."), &remote_cmdlist, "remote ", 0 /* allow-unknown */, &cmdlist); add_cmd ("put", class_files, remote_put_command, _("Copy a local file to the remote system."), &remote_cmdlist); add_cmd ("get", class_files, remote_get_command, _("Copy a remote file to the local system."), &remote_cmdlist); add_cmd ("delete", class_files, remote_delete_command, _("Delete a remote file."), &remote_cmdlist); remote_exec_file = xstrdup (""); add_setshow_string_noescape_cmd ("exec-file", class_files, &remote_exec_file, _("\ Set the remote pathname for \"run\""), _("\ Show the remote pathname for \"run\""), NULL, NULL, NULL, &remote_set_cmdlist, &remote_show_cmdlist); /* Eventually initialize fileio. See fileio.c */ initialize_remote_fileio (remote_set_cmdlist, remote_show_cmdlist); }
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