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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-7.1/] [gdb/] [gdbserver/] [regcache.c] - Rev 234
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/* Register support routines for the remote server for GDB. Copyright (C) 2001, 2002, 2004, 2005, 2007, 2008, 2009, 2010 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/>. */ #include "server.h" #include "regdef.h" #include <stdlib.h> #include <string.h> static int register_bytes; static struct reg *reg_defs; static int num_registers; const char **gdbserver_expedite_regs; struct regcache * get_thread_regcache (struct thread_info *thread, int fetch) { struct regcache *regcache; regcache = (struct regcache *) inferior_regcache_data (thread); if (regcache == NULL) fatal ("no register cache"); if (fetch && regcache->registers_valid == 0) { struct thread_info *saved_inferior = current_inferior; current_inferior = thread; fetch_inferior_registers (regcache, -1); current_inferior = saved_inferior; regcache->registers_valid = 1; } return regcache; } void regcache_invalidate_one (struct inferior_list_entry *entry) { struct thread_info *thread = (struct thread_info *) entry; struct regcache *regcache; regcache = (struct regcache *) inferior_regcache_data (thread); if (regcache->registers_valid) { struct thread_info *saved_inferior = current_inferior; current_inferior = thread; store_inferior_registers (regcache, -1); current_inferior = saved_inferior; } regcache->registers_valid = 0; } void regcache_invalidate (void) { for_each_inferior (&all_threads, regcache_invalidate_one); } struct regcache * new_register_cache (void) { struct regcache *regcache; if (register_bytes == 0) return NULL; /* The architecture hasn't been initialized yet. */ regcache = xmalloc (sizeof (*regcache)); /* Make sure to zero-initialize the register cache when it is created, in case there are registers the target never fetches. This way they'll read as zero instead of garbage. */ regcache->registers = xcalloc (1, register_bytes); regcache->registers_valid = 0; return regcache; } void free_register_cache (struct regcache *regcache) { if (regcache) { free (regcache->registers); free (regcache); } } static void realloc_register_cache (struct inferior_list_entry *thread_p) { struct thread_info *thread = (struct thread_info *) thread_p; struct regcache *regcache = (struct regcache *) inferior_regcache_data (thread); free_register_cache (regcache); set_inferior_regcache_data (thread, new_register_cache ()); } void set_register_cache (struct reg *regs, int n) { int offset, i; reg_defs = regs; num_registers = n; offset = 0; for (i = 0; i < n; i++) { regs[i].offset = offset; offset += regs[i].size; } register_bytes = offset / 8; /* Make sure PBUFSIZ is large enough to hold a full register packet. */ if (2 * register_bytes + 32 > PBUFSIZ) fatal ("Register packet size exceeds PBUFSIZ."); /* Re-allocate all pre-existing register caches. */ for_each_inferior (&all_threads, realloc_register_cache); } void registers_to_string (struct regcache *regcache, char *buf) { unsigned char *registers = regcache->registers; convert_int_to_ascii (registers, buf, register_bytes); } void registers_from_string (struct regcache *regcache, char *buf) { int len = strlen (buf); unsigned char *registers = regcache->registers; if (len != register_bytes * 2) { warning ("Wrong sized register packet (expected %d bytes, got %d)", 2*register_bytes, len); if (len > register_bytes * 2) len = register_bytes * 2; } convert_ascii_to_int (buf, registers, len / 2); } struct reg * find_register_by_name (const char *name) { int i; for (i = 0; i < num_registers; i++) if (!strcmp (name, reg_defs[i].name)) return ®_defs[i]; fatal ("Unknown register %s requested", name); return 0; } int find_regno (const char *name) { int i; for (i = 0; i < num_registers; i++) if (!strcmp (name, reg_defs[i].name)) return i; fatal ("Unknown register %s requested", name); return -1; } struct reg * find_register_by_number (int n) { return ®_defs[n]; } int register_size (int n) { return reg_defs[n].size / 8; } static unsigned char * register_data (struct regcache *regcache, int n, int fetch) { return regcache->registers + (reg_defs[n].offset / 8); } void supply_register (struct regcache *regcache, int n, const void *buf) { if (buf) memcpy (register_data (regcache, n, 0), buf, register_size (n)); else memset (register_data (regcache, n, 0), 0, register_size (n)); } void supply_register_by_name (struct regcache *regcache, const char *name, const void *buf) { supply_register (regcache, find_regno (name), buf); } void collect_register (struct regcache *regcache, int n, void *buf) { memcpy (buf, register_data (regcache, n, 1), register_size (n)); } void collect_register_as_string (struct regcache *regcache, int n, char *buf) { convert_int_to_ascii (register_data (regcache, n, 1), buf, register_size (n)); } void collect_register_by_name (struct regcache *regcache, const char *name, void *buf) { collect_register (regcache, find_regno (name), buf); }
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