| /* Register support routines for the remote server for GDB. |
| Copyright 2001, 2002 |
| 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 2 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, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #include "server.h" |
| #include "regdef.h" |
| |
| #include <stdlib.h> |
| #include <string.h> |
| |
| /* The private data for the register cache. Note that we have one |
| per inferior; this is primarily for simplicity, as the performance |
| benefit is minimal. */ |
| |
| struct inferior_regcache_data |
| { |
| int registers_valid; |
| char *registers; |
| }; |
| |
| static int register_bytes; |
| |
| static struct reg *reg_defs; |
| static int num_registers; |
| |
| const char **gdbserver_expedite_regs; |
| |
| static struct inferior_regcache_data * |
| get_regcache (struct thread_info *inf, int fetch) |
| { |
| struct inferior_regcache_data *regcache; |
| |
| regcache = (struct inferior_regcache_data *) inferior_regcache_data (inf); |
| |
| if (regcache == NULL) |
| fatal ("no register cache"); |
| |
| /* FIXME - fetch registers for INF */ |
| if (fetch && regcache->registers_valid == 0) |
| { |
| fetch_inferior_registers (0); |
| regcache->registers_valid = 1; |
| } |
| |
| return regcache; |
| } |
| |
| void |
| regcache_invalidate_one (struct inferior_list_entry *entry) |
| { |
| struct thread_info *thread = (struct thread_info *) entry; |
| struct inferior_regcache_data *regcache; |
| |
| regcache = (struct inferior_regcache_data *) inferior_regcache_data (thread); |
| |
| if (regcache->registers_valid) |
| { |
| struct thread_info *saved_inferior = current_inferior; |
| |
| current_inferior = thread; |
| store_inferior_registers (-1); |
| current_inferior = saved_inferior; |
| } |
| |
| regcache->registers_valid = 0; |
| } |
| |
| void |
| regcache_invalidate () |
| { |
| for_each_inferior (&all_threads, regcache_invalidate_one); |
| } |
| |
| int |
| registers_length (void) |
| { |
| return 2 * register_bytes; |
| } |
| |
| void * |
| new_register_cache (void) |
| { |
| struct inferior_regcache_data *regcache; |
| |
| regcache = malloc (sizeof (*regcache)); |
| |
| regcache->registers = malloc (register_bytes); |
| if (regcache->registers == NULL) |
| fatal ("Could not allocate register cache."); |
| |
| regcache->registers_valid = 0; |
| |
| return regcache; |
| } |
| |
| void |
| free_register_cache (void *regcache_p) |
| { |
| struct inferior_regcache_data *regcache |
| = (struct inferior_regcache_data *) regcache_p; |
| |
| free (regcache->registers); |
| free (regcache); |
| } |
| |
| 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; |
| } |
| |
| void |
| registers_to_string (char *buf) |
| { |
| char *registers = get_regcache (current_inferior, 1)->registers; |
| |
| convert_int_to_ascii (registers, buf, register_bytes); |
| } |
| |
| void |
| registers_from_string (char *buf) |
| { |
| int len = strlen (buf); |
| char *registers = get_regcache (current_inferior, 1)->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 char * |
| register_data (int n, int fetch) |
| { |
| char *registers = get_regcache (current_inferior, fetch)->registers; |
| |
| return registers + (reg_defs[n].offset / 8); |
| } |
| |
| void |
| supply_register (int n, const void *buf) |
| { |
| memcpy (register_data (n, 0), buf, register_size (n)); |
| } |
| |
| void |
| supply_register_by_name (const char *name, const void *buf) |
| { |
| supply_register (find_regno (name), buf); |
| } |
| |
| void |
| collect_register (int n, void *buf) |
| { |
| memcpy (buf, register_data (n, 1), register_size (n)); |
| } |
| |
| void |
| collect_register_as_string (int n, char *buf) |
| { |
| convert_int_to_ascii (register_data (n, 1), buf, register_size (n)); |
| } |
| |
| void |
| collect_register_by_name (const char *name, void *buf) |
| { |
| collect_register (find_regno (name), buf); |
| } |