gdb/i386-sol2-tdep.c - gdb

Global variables defined

Functions defined

Source code

  1. /* Target-dependent code for Solaris x86.

  3.    Copyright (C) 2002-2015 Free Software Foundation, Inc.

  5.    This file is part of GDB.

  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.

  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.

  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/>.  */

  20. #include "defs.h"
  21. #include "value.h"
  22. #include "osabi.h"

  24. #include "sol2-tdep.h"
  25. #include "i386-tdep.h"
  26. #include "solib-svr4.h"

  28. /* From <ia32/sys/reg.h>.  */
  29. ‌static int i386_sol2_gregset_reg_offset[] =
  30. {
  31.   11 * 4,                        /* %eax */
  32.   10 * 4,                        /* %ecx */
  33.   9 * 4,                        /* %edx */
  34.   8 * 4,                        /* %ebx */
  35.   17 * 4,                        /* %esp */
  36.   6 * 4,                        /* %ebp */
  37.   5 * 4,                        /* %esi */
  38.   4 * 4,                        /* %edi */
  39.   14 * 4,                        /* %eip */
  40.   16 * 4,                        /* %eflags */
  41.   15 * 4,                        /* %cs */
  42.   18 * 4,                        /* %ss */
  43.   3 * 4,                        /* %ds */
  44.   2 * 4,                        /* %es */
  45.   1 * 4,                        /* %fs */
  46.   0 * 4                                /* %gs */
  47. };

  49. /* Return whether THIS_FRAME corresponds to a Solaris sigtramp
  50.    routine.  */

  52. static int
  53. ‌i386_sol2_sigtramp_p (struct frame_info *this_frame)
  54. {
  55.   CORE_ADDR pc = get_frame_pc (this_frame);
  56.   const char *name;

  58.   find_pc_partial_function (pc, &name, NULL, NULL);
  59.   return (name && (strcmp ("sigacthandler", name) == 0
  60.                    || strcmp (name, "ucbsigvechandler") == 0));
  61. }

  63. /* Solaris doesn't have a `struct sigcontext', but it does have a
  64.    `mcontext_t' that contains the saved set of machine registers.  */

  66. static CORE_ADDR
  67. ‌i386_sol2_mcontext_addr (struct frame_info *this_frame)
  68. {
  69.   CORE_ADDR sp, ucontext_addr;

  71.   sp = get_frame_register_unsigned (this_frame, I386_ESP_REGNUM);
  72.   ucontext_addr = get_frame_memory_unsigned (this_frame, sp + 8, 4);

  74.   return ucontext_addr + 36;
  75. }

  77. /* SunPRO encodes the static variables.  This is not related to C++
  78.    mangling, it is done for C too.  */

  80. static const char *
  81. ‌i386_sol2_static_transform_name (const char *name)
  82. {
  83.   char *p;
  84.   if (name[0] == '.')
  85.     {
  86.       /* For file-local statics there will be a period, a bunch of
  87.          junk (the contents of which match a string given in the
  88.          N_OPT), a period and the name.  For function-local statics
  89.          there will be a bunch of junk (which seems to change the
  90.          second character from 'A' to 'B'), a period, the name of the
  91.          function, and the name.  So just skip everything before the
  92.          last period.  */
  93.       p = strrchr (name, '.');
  94.       if (p != NULL)
  95.         name = p + 1;
  96.     }
  97.   return name;
  98. }

  100. /* Solaris 2.  */

  102. static void
  103. ‌i386_sol2_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
  104. {
  105.   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);

  107.   /* Solaris is SVR4-based.  */
  108.   i386_svr4_init_abi (info, gdbarch);

  110.   /* The SunPRO compiler puts out 0 instead of the address in N_SO symbols,
  111.      and for SunPRO 3.0, N_FUN symbols too.  */
  112.   set_gdbarch_sofun_address_maybe_missing (gdbarch, 1);

  114.   /* Handle SunPRO encoding of static symbols.  */
  115.   set_gdbarch_static_transform_name (gdbarch, i386_sol2_static_transform_name);

  117.   /* Solaris reserves space for its FPU emulator in `fpregset_t'.
  118.      There is also some space reserved for the registers of a Weitek
  119.      math coprocessor.  */
  120.   tdep->gregset_reg_offset = i386_sol2_gregset_reg_offset;
  121.   tdep->gregset_num_regs = ARRAY_SIZE (i386_sol2_gregset_reg_offset);
  122.   tdep->sizeof_gregset = 19 * 4;
  123.   tdep->sizeof_fpregset = 380;

  125.   /* Signal trampolines are slightly different from SVR4.  */
  126.   tdep->sigtramp_p = i386_sol2_sigtramp_p;
  127.   tdep->sigcontext_addr = i386_sol2_mcontext_addr;
  128.   tdep->sc_reg_offset = tdep->gregset_reg_offset;
  129.   tdep->sc_num_regs = tdep->gregset_num_regs;

  131.   /* Solaris has SVR4-style shared libraries.  */
  132.   set_gdbarch_skip_solib_resolver (gdbarch, sol2_skip_solib_resolver);
  133.   set_solib_svr4_fetch_link_map_offsets
  134.     (gdbarch, svr4_ilp32_fetch_link_map_offsets);

  136.   /* How to print LWP PTIDs from core files.  */
  137.   set_gdbarch_core_pid_to_str (gdbarch, sol2_core_pid_to_str);
  138. }


  141. static enum gdb_osabi
  142. ‌i386_sol2_osabi_sniffer (bfd *abfd)
  143. {
  144.   /* If we have a section named .SUNW_version, then it is almost
  145.      certainly Solaris 2.  */
  146.   if (bfd_get_section_by_name (abfd, ".SUNW_version"))
  147.     return GDB_OSABI_SOLARIS;

  149.   return GDB_OSABI_UNKNOWN;
  150. }

  152. /* Provide a prototype to silence -Wmissing-prototypes.  */
  153. void _initialize_i386_sol2_tdep (void);

  155. void
  156. ‌_initialize_i386_sol2_tdep (void)
  157. {
  158.   /* Register an ELF OS ABI sniffer for Solaris 2 binaries.  */
  159.   gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_elf_flavour,
  160.                                   i386_sol2_osabi_sniffer);

  162.   gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_SOLARIS,
  163.                           i386_sol2_init_abi);
  164. }