gdb/amd64obsd-nat.c

   1 /* Native-dependent code for OpenBSD/amd64.
   2
   3    Copyright 2003, 2004 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 "defs.h"
  23
  24 #include "gdb_assert.h"
  25
  26 #include "amd64-tdep.h"
  27 #include "amd64-nat.h"
  28
  29 /* Mapping between the general-purpose registers in OpenBSD/amd64
  30    `struct reg' format and GDB's register cache layout for
  31    OpenBSD/i386.
  32
  33    Note that most (if not all) OpenBSD/amd64 registers are 64-bit,
  34    while the OpenBSD/i386 registers are all 32-bit, but since we're
  35    little-endian we get away with that.  */
  36
  37 /* From <machine/reg.h>.  */
  38 static int amd64obsd32_r_reg_offset[] =
  39 {
  40   14 * 8,                       /* %eax */
  41   3 * 8,                        /* %ecx */
  42   2 * 8,                        /* %edx */
  43   13 * 8,                       /* %ebx */
  44   15 * 8,                       /* %esp */
  45   12 * 8,                       /* %ebp */
  46   1 * 8,                        /* %esi */
  47   0 * 8,                        /* %edi */
  48   16 * 8,                       /* %eip */
  49   17 * 8,                       /* %eflags */
  50   18 * 8,                       /* %cs */
  51   19 * 8,                       /* %ss */
  52   20 * 8,                       /* %ds */
  53   21 * 8,                       /* %es */
  54   22 * 8,                       /* %fs */
  55   23 * 8                        /* %gs */
  56 };
  57 \f
  58
  59 /* Provide a prototype to silence -Wmissing-prototypes.  */
  60 void _initialize_amd64obsd_nat (void);
  61
  62 void
  63 _initialize_amd64obsd_nat (void)
  64 {
  65   amd64_native_gregset32_reg_offset = amd64obsd32_r_reg_offset;
  66   amd64_native_gregset32_num_regs = ARRAY_SIZE (amd64obsd32_r_reg_offset);
  67   amd64_native_gregset64_reg_offset = amd64obsd_r_reg_offset;
  68 }