gdb/i386-sol2-tdep.c

   1 /* Target-dependent code for Solaris x86.
   2    Copyright 2002, 2003 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 2 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, write to the Free Software
  18    Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include "defs.h"
  22 #include "value.h"
  23 #include "osabi.h"
  24
  25 #include "i386-tdep.h"
  26
  27 /* From <ia32/sys/reg.h>.  */
  28 static int i386_sol2_gregset_reg_offset[] =
  29 {
  30   11 * 4,                       /* %eax */
  31   10 * 4,                       /* %ecx */
  32   9 * 4,                        /* %edx */
  33   8 * 4,                        /* %ebx */
  34   17 * 4,                       /* %esp */
  35   6 * 4,                        /* %ebp */
  36   5 * 4,                        /* %esi */
  37   4 * 4,                        /* %edi */
  38   14 * 4,                       /* %eip */
  39   16 * 4,                       /* %eflags */
  40   15 * 4,                       /* %cs */
  41   18 * 4,                       /* %ss */
  42   3 * 4,                        /* %ds */
  43   2 * 4,                        /* %es */
  44   1 * 4,                        /* %fs */
  45   0 * 4                         /* %gs */
  46 };
  47
  48 static int
  49 i386_sol2_pc_in_sigtramp (CORE_ADDR pc, char *name)
  50 {
  51   /* Signal handler frames under Solaris 2 are recognized by a return
  52      address of 0xffffffff.  */
  53   return (pc == 0xffffffff);
  54 }
  55
  56 /* Solaris 2.  */
  57
  58 static void
  59 i386_sol2_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
  60 {
  61   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
  62
  63   /* Solaris is SVR4-based.  */
  64   i386_svr4_init_abi (info, gdbarch);
  65
  66   /* Solaris reserves space for its FPU emulator in `fpregset_t'.
  67      There is also some space reserved for the registers of a Weitek
  68      math coprocessor.  */
  69   tdep->gregset_reg_offset = i386_sol2_gregset_reg_offset;
  70   tdep->gregset_num_regs = ARRAY_SIZE (i386_sol2_gregset_reg_offset);
  71   tdep->sizeof_gregset = 19 * 4;
  72   tdep->sizeof_fpregset = 380;
  73
  74   /* Signal trampolines are slightly different from SVR4.  */
  75   set_gdbarch_pc_in_sigtramp (gdbarch, i386_sol2_pc_in_sigtramp);
  76 }
  77 \f
  78
  79 static enum gdb_osabi
  80 i386_sol2_osabi_sniffer (bfd *abfd)
  81 {
  82   /* If we have a section named .SUNW_version, then it is almost
  83      certainly Solaris 2.  */
  84   if (bfd_get_section_by_name (abfd, ".SUNW_version"))
  85     return GDB_OSABI_SOLARIS;
  86
  87   return GDB_OSABI_UNKNOWN;
  88 }
  89
  90 /* Provide a prototype to silence -Wmissing-prototypes.  */
  91 void _initialize_i386_sol2_tdep (void);
  92
  93 void
  94 _initialize_i386_sol2_tdep (void)
  95 {
  96   /* Register an ELF OS ABI sniffer for Solaris 2 binaries.  */
  97   gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_elf_flavour,
  98                                   i386_sol2_osabi_sniffer);
  99
 100   gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_SOLARIS,
 101                           i386_sol2_init_abi);
 102 }