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jeremybenn |
/* Remote debugging interface to Xilinx MicroBlaze.
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Copyright 2009, 2010 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "gdbcore.h"
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#include "target.h"
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#include "monitor.h"
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#include "gdb_string.h"
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#include "serial.h"
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#include "regcache.h"
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static char *picobug_inits[] =
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{"\r", NULL};
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static struct target_ops picobug_ops;
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static struct monitor_ops picobug_cmds;
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/* Picobug only supports a subset of registers from MCore. In reality,
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it doesn't support ss1, either. */
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static char *picobug_regnames[] = {
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"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
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"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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"psr", "vbr", "epsr", "fpsr", "epc", "fpc", 0, "ss1",
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"ss2", "ss3", "ss4", 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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"pc" };
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static void
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picobug_open (char *args, int from_tty)
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{
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monitor_open (args, &picobug_cmds, from_tty);
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}
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/* We choose to write our own dumpregs routine, since the output of
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the register dumping is rather difficult to encapsulate in a
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regexp:
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picobug> rd
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pc 2f00031e epc 2f00031e fpc 00000000
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psr 80000101 epsr 80000101 fpsr 00000000
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ss0-ss4 bad0beef 00000000 00000000 00000000 00000000 vbr 30005c00
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r0-r7 2f0fff4c 00000090 00000001 00000002 00000003 00000004 00000005 00000006
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r8-r15 2f0fff64 00000000 00000000 00000000 00000000 00000000 00000000 2f00031e
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*/
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static int
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picobug_dumpregs (struct regcache *regcache)
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{
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struct gdbarch *gdbarch = get_regcache_arch (regcache);
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char buf[1024];
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int resp_len;
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char *p;
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/* Send the dump register command to the monitor and
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get the reply. */
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monitor_printf (picobug_cmds.dump_registers);
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resp_len = monitor_expect_prompt (buf, sizeof (buf));
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p = strtok (buf, " \t\r\n");
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while (p)
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{
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if (strchr (p, '-'))
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{
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/* got a range. either r0-r7, r8-r15 or ss0-ss4. */
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if (strncmp (p, "r0", 2) == 0 || strncmp (p, "r8", 2) == 0)
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{
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int rn = (p[1] == '0' ? 0 : 8);
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int i = 0;
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/* Get the next 8 values and record them. */
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while (i < 8)
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{
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p = strtok (NULL, " \t\r\n");
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if (p)
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monitor_supply_register (regcache, rn + i, p);
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i++;
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}
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}
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else if (strncmp (p, "ss", 2) == 0)
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{
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/* get the next five values, ignoring the first. */
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int rn;
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p = strtok (NULL, " \t\r\n");
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for (rn = 39; rn < 43; rn++)
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{
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p = strtok (NULL, " \t\r\n");
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if (p)
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monitor_supply_register (regcache, rn, p);
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}
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}
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else
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{
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break;
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}
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}
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else
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{
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/* Simple register type, paired. */
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char *name = p;
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int i;
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/* Get and record value. */
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p = strtok (NULL, " \t\r\n");
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if (p)
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{
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for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
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{
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if (picobug_regnames[i]
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&& strcmp (picobug_regnames[i], name) == 0)
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break;
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}
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if (i <= gdbarch_num_regs (gdbarch))
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monitor_supply_register (regcache, i, p);
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}
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}
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p = strtok (NULL, " \t\r\n");
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}
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return 0;
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}
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static void
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init_picobug_cmds (void)
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{
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picobug_cmds.flags = MO_GETMEM_NEEDS_RANGE | MO_CLR_BREAK_USES_ADDR
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| MO_PRINT_PROGRAM_OUTPUT;
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picobug_cmds.init = picobug_inits; /* Init strings */
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picobug_cmds.cont = "g\n"; /* continue command */
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picobug_cmds.step = "s\n"; /* single step */
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picobug_cmds.set_break = "br %x\n"; /* set a breakpoint */
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picobug_cmds.clr_break = "nobr %x\n"; /* clear a breakpoint */
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picobug_cmds.clr_all_break = "nobr\n"; /* clear all breakpoints */
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picobug_cmds.setmem.cmdb = "mm %x %x ;b\n"; /* setmem.cmdb (addr, value) */
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picobug_cmds.setmem.cmdw = "mm %x %x ;h\n"; /* setmem.cmdw (addr, value) */
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picobug_cmds.setmem.cmdl = "mm %x %x ;w\n"; /* setmem.cmdl (addr, value) */
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picobug_cmds.getmem.cmdb = "md %x %x\n"; /* getmem.cmdb (start addr,
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end addr) */
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picobug_cmds.getmem.resp_delim = ":"; /* getmem.resp_delim */
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picobug_cmds.setreg.cmd = "rm %s %x\n"; /* setreg.cmd (name, value) */
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picobug_cmds.getreg.cmd = "rd %s\n"; /* getreg.cmd (name) */
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picobug_cmds.getreg.resp_delim = ":"; /* getreg.resp_delim */
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picobug_cmds.dump_registers = "rd\n"; /* dump_registers */
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picobug_cmds.dumpregs = picobug_dumpregs; /* dump registers parser */
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picobug_cmds.load = "lo\n"; /* download command */
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picobug_cmds.prompt = "picobug> "; /* monitor command prompt */
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picobug_cmds.line_term = "\n"; /* end-of-line terminator */
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picobug_cmds.target = &picobug_ops; /* target operations */
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picobug_cmds.stopbits = SERIAL_1_STOPBITS; /* number of stop bits */
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picobug_cmds.regnames = picobug_regnames; /* registers names */
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picobug_cmds.num_breakpoints = 20; /* number of breakpoints */
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picobug_cmds.magic = MONITOR_OPS_MAGIC; /* magic */
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}
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void
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_initialize_picobug_rom ()
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{
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int i;
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/* Initialize m32r RevC monitor target. */
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init_picobug_cmds ();
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init_monitor_ops (&picobug_ops);
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picobug_ops.to_shortname = "picobug";
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picobug_ops.to_longname = "picobug monitor";
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picobug_ops.to_doc = "Debug via the picobug monitor.\n\
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Specify the serial device it is connected to (e.g. /dev/ttya).";
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picobug_ops.to_open = picobug_open;
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add_target (&picobug_ops);
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}
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