gdb/i386-sol2-tdep.c

   1 /* Target-dependent code for Solaris x86.
   2    Copyright 2002 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
  24 #include "i386-tdep.h"
  25
  26 static int
  27 i386_sol2_pc_in_sigtramp (CORE_ADDR pc, char *name)
  28 {
  29   /* Signal handler frames under Solaris 2 are recognized by a return
  30      address of 0xffffffff.  */
  31   return (pc == 0xffffffff);
  32 }
  33
  34 /* Solaris 2.  */
  35
  36 static void
  37 i386_sol2_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
  38 {
  39   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
  40
  41   /* Solaris is SVR4-based.  */
  42   i386_svr4_init_abi (info, gdbarch);
  43
  44   /* Signal trampolines are different from SVR4, in fact they're
  45      rather similar to BSD.  */
  46   set_gdbarch_pc_in_sigtramp (gdbarch, i386_sol2_pc_in_sigtramp);
  47   tdep->sigcontext_addr = i386bsd_sigcontext_addr;
  48   tdep->sc_pc_offset = 36 + 14 * 4;
  49   tdep->sc_sp_offset = 36 + 17 * 4;
  50
  51   /* Assume that the prototype flag can be trusted.  */
  52   set_gdbarch_coerce_float_to_double (gdbarch,
  53                                       standard_coerce_float_to_double);
  54 }
  55 \f
  56
  57 static enum gdb_osabi
  58 i386_sol2_osabi_sniffer (bfd *abfd)
  59 {
  60   /* If we have a section named .SUNW_version, then it is almost
  61      certainly Solaris 2.  */
  62   if (bfd_get_section_by_name (abfd, ".SUNW_version"))
  63     return GDB_OSABI_SOLARIS;
  64
  65   return GDB_OSABI_UNKNOWN;
  66 }
  67
  68 /* Provide a prototype to silence -Wmissing-prototypes.  */
  69 void _initialize_i386_sol2_tdep (void);
  70
  71 void
  72 _initialize_i386_sol2_tdep (void)
  73 {
  74   /* Register an ELF OS ABI sniffer for Solaris 2 binaries.  */
  75   gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_elf_flavour,
  76                                   i386_sol2_osabi_sniffer);
  77
  78   gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_SOLARIS,
  79                           i386_sol2_init_abi);
  80 }