gdb/gdbserver/linux-i386-low.c

   1 /* GNU/Linux/i386 specific low level interface, for the remote server for GDB.
   2    Copyright 1995, 1996, 1998, 1999, 2000, 2001, 2002
   3    Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #include "server.h"
  23
  24 #ifdef HAVE_SYS_REG_H
  25 #include <sys/reg.h>
  26 #endif
  27
  28 /* This module only supports access to the general purpose registers.
  29    Adjust the relevant constants accordingly.
  30
  31    FIXME: kettenis/2001-03-28: We should really use PTRACE_GETREGS to
  32    get at the registers.  Better yet, we should try to share code with
  33    i386-linux-nat.c.  */
  34
  35 int num_regs = 16;
  36
  37 /* This stuff comes from i386-linux-nat.c.  */
  38
  39 /* Mapping between the general-purpose registers in `struct user'
  40    format and GDB's register array layout.  */
  41 int regmap[] =
  42 {
  43   EAX * 4, ECX * 4, EDX * 4, EBX * 4,
  44   UESP * 4, EBP * 4, ESI * 4, EDI * 4,
  45   EIP * 4, EFL * 4, CS * 4, SS * 4,
  46   DS * 4, ES * 4, FS * 4, GS * 4
  47 };
  48
  49 int
  50 cannot_store_register (int regno)
  51 {
  52   return (regno >= num_regs);
  53 }
  54
  55 int
  56 cannot_fetch_register (int regno)
  57 {
  58   return (regno >= num_regs);
  59 }