gdb/gdbserver/nto-x86-low.c

   1 /* QNX Neutrino specific low level interface, for the remote server
   2    for GDB.
   3    Copyright (C) 2009, 2010 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 3 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, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "server.h"
  21 #include "nto-low.h"
  22 #include "regdef.h"
  23 #include "regcache.h"
  24
  25 #include <x86/context.h>
  26
  27
  28 /* Definition auto generated from reg-i386.dep.  */
  29 extern void init_registers_i386 ();
  30 extern struct reg *regs_i386;
  31
  32 const unsigned char x86_breakpoint[] = { 0xCC };
  33 #define x86_breakpoint_len 1
  34
  35 /* Returns offset in appropriate Neutrino's context structure.
  36    Defined in x86/context.h.
  37    GDBREGNO is index into regs_i386 array.  It is autogenerated and
  38    hopefully doesn't change.  */
  39 static int
  40 nto_x86_register_offset (int gdbregno)
  41 {
  42   if (gdbregno >= 0 && gdbregno < 16)
  43     {
  44       X86_CPU_REGISTERS *dummy = (void*)0;
  45       /* GPRs  */
  46       switch (gdbregno)
  47         {
  48         case 0:
  49           return (int)&(dummy->eax);
  50         case 1:
  51           return (int)&(dummy->ecx);
  52         case 2:
  53           return (int)&(dummy->edx);
  54         case 3:
  55           return (int)&(dummy->ebx);
  56         case 4:
  57           return (int)&(dummy->esp);
  58         case 5:
  59           return (int)&(dummy->ebp);
  60         case 6:
  61           return (int)&(dummy->esi);
  62         case 7:
  63           return (int)&(dummy->edi);
  64         case 8:
  65           return (int)&(dummy->eip);
  66         case 9:
  67           return (int)&(dummy->efl);
  68         case 10:
  69           return (int)&(dummy->cs);
  70         case 11:
  71           return (int)&(dummy->ss);
  72 #ifdef __SEGMENTS__
  73         case 12:
  74           return (int)&(dummy->ds);
  75         case 13:
  76           return (int)&(dummy->es);
  77         case 14:
  78           return (int)&(dummy->fs);
  79         case 15:
  80           return (int)&(dummy->gs);
  81 #endif
  82         default:
  83           return -1;
  84         }
  85     }
  86   return -1;
  87 }
  88
  89 static void
  90 nto_x86_arch_setup (void)
  91 {
  92   init_registers_i386 ();
  93   the_low_target.num_regs = 16;
  94 }
  95
  96 struct nto_target_ops the_low_target =
  97 {
  98   nto_x86_arch_setup,
  99   0, /* num_regs */
 100   nto_x86_register_offset,
 101   x86_breakpoint,
 102   x86_breakpoint_len
 103 };
 104
 105
 106