gdb/i386-gnu-tdep.c

   1 /* Target-dependent code for the GNU Hurd.
   2    Copyright (C) 2002-2020 Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  18
  19 #include "defs.h"
  20 #include "osabi.h"
  21 #include "solib-svr4.h"
  22
  23 #include "i386-tdep.h"
  24
  25 /* From <sys/ucontext.h>.  */
  26 static int i386gnu_gregset_reg_offset[] =
  27 {
  28   11 * 4,               /* %eax */
  29   10 * 4,               /* %ecx */
  30   9 * 4,                /* %edx */
  31   8 * 4,                /* %ebx */
  32   17 * 4,               /* %uesp */
  33   6 * 4,                /* %ebp */
  34   5 * 4,                /* %esi */
  35   4 * 4,                /* %edi */
  36   14 * 4,               /* %eip */
  37   16 * 4,               /* %efl */
  38   15 * 4,               /* %cs */
  39   18 * 4,               /* %ss */
  40   3 * 4,                /* %ds */
  41   2 * 4,                /* %es */
  42   1 * 4,                /* %fs */
  43   0 * 4,                /* %gs */
  44 };
  45
  46 static void
  47 i386gnu_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
  48 {
  49   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
  50
  51   /* GNU uses ELF.  */
  52   i386_elf_init_abi (info, gdbarch);
  53
  54   set_solib_svr4_fetch_link_map_offsets
  55     (gdbarch, svr4_ilp32_fetch_link_map_offsets);
  56
  57   tdep->gregset_reg_offset = i386gnu_gregset_reg_offset;
  58   tdep->gregset_num_regs = ARRAY_SIZE (i386gnu_gregset_reg_offset);
  59   tdep->sizeof_gregset = 19 * 4;
  60
  61   tdep->jb_pc_offset = 20;      /* From <bits/setjmp.h>.  */
  62 }
  63
  64 void _initialize_i386gnu_tdep ();
  65 void
  66 _initialize_i386gnu_tdep ()
  67 {
  68   gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_HURD, i386gnu_init_abi);
  69 }