gdb/i386nbsd-tdep.c

   1 /* Target-dependent code for NetBSD/i386, for GDB.
   2    Copyright 1988, 1989, 1991, 1992, 1994, 1996, 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 "defs.h"
  23 #include "gdbtypes.h"
  24 #include "gdbcore.h"
  25 #include "regcache.h"
  26
  27 #include "i387-tdep.h"
  28
  29 /* Map a GDB register number to an offset in the reg structure.  */
  30 static int regmap[] =
  31 {
  32   ( 0 * 4),             /* %eax */
  33   ( 1 * 4),             /* %ecx */
  34   ( 2 * 4),             /* %edx */
  35   ( 3 * 4),             /* %ebx */
  36   ( 4 * 4),             /* %esp */
  37   ( 5 * 4),             /* %epb */
  38   ( 6 * 4),             /* %esi */
  39   ( 7 * 4),             /* %edi */
  40   ( 8 * 4),             /* %eip */
  41   ( 9 * 4),             /* %eflags */
  42   (10 * 4),             /* %cs */
  43   (11 * 4),             /* %ss */
  44   (12 * 4),             /* %ds */
  45   (13 * 4),             /* %es */
  46   (14 * 4),             /* %fs */
  47   (15 * 4),             /* %gs */
  48 };
  49
  50 #define SIZEOF_STRUCT_REG       (16 * 4)
  51
  52 static void
  53 i386nbsd_supply_reg (char *regs, int regno)
  54 {
  55   int i;
  56
  57   for (i = 0; i <= 15; i++)
  58     if (regno == i || regno == -1)
  59       supply_register (i, regs + regmap[i]);
  60 }
  61
  62 static void
  63 fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
  64                       CORE_ADDR ignore)
  65 {
  66   char *regs, *fsave;
  67
  68   /* We get everything from one section.  */
  69   if (which != 0)
  70     return;
  71
  72   if (core_reg_size < (SIZEOF_STRUCT_REG + 108))
  73     {
  74       warning ("Wrong size register set in core file.");
  75       return;
  76     }
  77
  78   regs = core_reg_sect;
  79   fsave = core_reg_sect + SIZEOF_STRUCT_REG;
  80
  81   /* Integer registers.  */
  82   i386nbsd_supply_reg (regs, -1);
  83
  84   /* Floating point registers.  */
  85   i387_supply_fsave (fsave);
  86 }
  87
  88 static void
  89 fetch_elfcore_registers (char *core_reg_sect, unsigned core_reg_size,
  90                          int which, CORE_ADDR ignore)
  91 {
  92   switch (which)
  93     {
  94     case 0:  /* Integer registers.  */
  95       if (core_reg_size != SIZEOF_STRUCT_REG)
  96         warning ("Wrong size register set in core file.");
  97       else
  98         i386nbsd_supply_reg (core_reg_sect, -1);
  99       break;
 100
 101     case 2:  /* Floating point registers.  */
 102       if (core_reg_size != 108)
 103         warning ("Wrong size FP register set in core file.");
 104       else
 105         i387_supply_fsave (core_reg_sect);
 106       break;
 107
 108     case 3:  /* "Extended" floating point registers.  This is gdb-speak
 109                 for SSE/SSE2. */
 110       if (core_reg_size != 512)
 111         warning ("Wrong size XMM register set in core file.");
 112       else
 113         i387_supply_fxsave (core_reg_sect);
 114       break;
 115
 116     default:
 117       /* Don't know what kind of register request this is; just ignore it.  */
 118       break;
 119     }
 120 }
 121
 122 static struct core_fns i386nbsd_core_fns =
 123 {
 124   bfd_target_unknown_flavour,           /* core_flavour */
 125   default_check_format,                 /* check_format */
 126   default_core_sniffer,                 /* core_sniffer */
 127   fetch_core_registers,                 /* core_read_registers */
 128   NULL                                  /* next */
 129 };
 130
 131 static struct core_fns i386nbsd_elfcore_fns =
 132 {
 133   bfd_target_elf_flavour,               /* core_flavour */
 134   default_check_format,                 /* check_format */
 135   default_core_sniffer,                 /* core_sniffer */
 136   fetch_elfcore_registers,              /* core_read_registers */
 137   NULL                                  /* next */
 138 };
 139
 140 void
 141 _initialize_i386nbsd_tdep (void)
 142 {
 143   add_core_fns (&i386nbsd_core_fns);
 144   add_core_fns (&i386nbsd_elfcore_fns);
 145 }