gdb/gdbserver/nto-x86-low.c

   1 /* QNX Neutrino specific low level interface, for the remote server
   2    for GDB.
   3    Copyright (C) 2009-2016 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 extern const struct target_desc *tdesc_i386;
  32
  33 const unsigned char x86_breakpoint[] = { 0xCC };
  34 #define x86_breakpoint_len 1
  35
  36 /* Returns offset in appropriate Neutrino's context structure.
  37    Defined in x86/context.h.
  38    GDBREGNO is index into regs_i386 array.  It is autogenerated and
  39    hopefully doesn't change.  */
  40 static int
  41 nto_x86_register_offset (int gdbregno)
  42 {
  43   if (gdbregno >= 0 && gdbregno < 16)
  44     {
  45       X86_CPU_REGISTERS *dummy = (void*)0;
  46       /* GPRs  */
  47       switch (gdbregno)
  48         {
  49         case 0:
  50           return (int)&(dummy->eax);
  51         case 1:
  52           return (int)&(dummy->ecx);
  53         case 2:
  54           return (int)&(dummy->edx);
  55         case 3:
  56           return (int)&(dummy->ebx);
  57         case 4:
  58           return (int)&(dummy->esp);
  59         case 5:
  60           return (int)&(dummy->ebp);
  61         case 6:
  62           return (int)&(dummy->esi);
  63         case 7:
  64           return (int)&(dummy->edi);
  65         case 8:
  66           return (int)&(dummy->eip);
  67         case 9:
  68           return (int)&(dummy->efl);
  69         case 10:
  70           return (int)&(dummy->cs);
  71         case 11:
  72           return (int)&(dummy->ss);
  73 #ifdef __SEGMENTS__
  74         case 12:
  75           return (int)&(dummy->ds);
  76         case 13:
  77           return (int)&(dummy->es);
  78         case 14:
  79           return (int)&(dummy->fs);
  80         case 15:
  81           return (int)&(dummy->gs);
  82 #endif
  83         default:
  84           return -1;
  85         }
  86     }
  87   return -1;
  88 }
  89
  90 static void
  91 nto_x86_arch_setup (void)
  92 {
  93   init_registers_i386 ();
  94   the_low_target.num_regs = 16;
  95   nto_tdesc = tdesc_i386;
  96 }
  97
  98 struct nto_target_ops the_low_target =
  99 {
 100   nto_x86_arch_setup,
 101   0, /* num_regs */
 102   nto_x86_register_offset,
 103   x86_breakpoint,
 104   x86_breakpoint_len
 105 };
 106
 107
 108