gdb/amd64-darwin-tdep.c - gdb

Global variables defined

Functions defined

Source code

  1. /* Darwin support for GDB, the GNU debugger.
  2.    Copyright (C) 1997-2015 Free Software Foundation, Inc.

  4.    Contributed by Apple Computer, Inc.

  6.    This file is part of GDB.

  8.    This program is free software; you can redistribute it and/or modify
  9.    it under the terms of the GNU General Public License as published by
  10.    the Free Software Foundation; either version 3 of the License, or
  11.    (at your option) any later version.

  13.    This program is distributed in the hope that it will be useful,
  14.    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15.    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16.    GNU General Public License for more details.

  18.    You should have received a copy of the GNU General Public License
  19.    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

  21. #include "defs.h"
  22. #include "frame.h"
  23. #include "inferior.h"
  24. #include "gdbcore.h"
  25. #include "target.h"
  26. #include "floatformat.h"
  27. #include "symtab.h"
  28. #include "regcache.h"
  29. #include "libbfd.h"
  30. #include "objfiles.h"

  32. #include "i387-tdep.h"
  33. #include "amd64-tdep.h"
  34. #include "osabi.h"
  35. #include "ui-out.h"
  36. #include "amd64-darwin-tdep.h"
  37. #include "i386-darwin-tdep.h"
  38. #include "solib.h"
  39. #include "solib-darwin.h"
  40. #include "dwarf2-frame.h"

  42. /* Offsets into the struct x86_thread_state64 where we'll find the saved regs.
  43.    From <mach/i386/thread_status.h> and amd64-tdep.h.  */
  44. ‌int amd64_darwin_thread_state_reg_offset[] =
  45. {
  46.   0 * 8,                        /* %rax */
  47.   1 * 8,                        /* %rbx */
  48.   2 * 8,                        /* %rcx */
  49.   3 * 8,                        /* %rdx */
  50.   5 * 8,                        /* %rsi */
  51.   4 * 8,                        /* %rdi */
  52.   6 * 8,                        /* %rbp */
  53.   7 * 8,                        /* %rsp */
  54.   8 * 8,                        /* %r8 ...  */
  55.   9 * 8,
  56.   10 * 8,
  57.   11 * 8,
  58.   12 * 8,
  59.   13 * 8,
  60.   14 * 8,
  61.   15 * 8,                        /* ... %r15 */
  62.   16 * 8,                        /* %rip */
  63.   17 * 8,                        /* %rflags */
  64.   18 * 8,                        /* %cs */
  65.   -1,                                /* %ss */
  66.   -1,                                /* %ds */
  67.   -1,                                /* %es */
  68.   19 * 8,                        /* %fs */
  69.   20 * 8                        /* %gs */
  70. };

  72. ‌const int amd64_darwin_thread_state_num_regs =
  73.   ARRAY_SIZE (amd64_darwin_thread_state_reg_offset);

  75. /* Assuming THIS_FRAME is a Darwin sigtramp routine, return the
  76.    address of the associated sigcontext structure.  */

  78. static CORE_ADDR
  79. ‌amd64_darwin_sigcontext_addr (struct frame_info *this_frame)
  80. {
  81.   struct gdbarch *gdbarch = get_frame_arch (this_frame);
  82.   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
  83.   CORE_ADDR rbx;
  84.   gdb_byte buf[8];

  86.   /* A pointer to the ucontext is passed as the fourth argument
  87.      to the signal handler, which is saved in rbx.  */
  88.   get_frame_register (this_frame, AMD64_RBX_REGNUM, buf);
  89.   rbx = extract_unsigned_integer (buf, 8, byte_order);

  91.   /* The pointer to mcontext is at offset 48.  */
  92.   read_memory (rbx + 48, buf, 8);

  94.   /* First register (rax) is at offset 16.  */
  95.   return extract_unsigned_integer (buf, 8, byte_order) + 16;
  96. }

  98. static void
  99. ‌x86_darwin_init_abi_64 (struct gdbarch_info info, struct gdbarch *gdbarch)
  100. {
  101.   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);

  103.   amd64_init_abi (info, gdbarch);

  105.   tdep->struct_return = reg_struct_return;

  107.   dwarf2_frame_set_signal_frame_p (gdbarch, darwin_dwarf_signal_frame_p);

  109.   tdep->sigtramp_p = i386_sigtramp_p;
  110.   tdep->sigcontext_addr = amd64_darwin_sigcontext_addr;
  111.   tdep->sc_reg_offset = amd64_darwin_thread_state_reg_offset;
  112.   tdep->sc_num_regs = amd64_darwin_thread_state_num_regs;

  114.   tdep->jb_pc_offset = 56;

  116.   set_solib_ops (gdbarch, &darwin_so_ops);
  117. }

  119. /* -Wmissing-prototypes */
  120. extern initialize_file_ftype _initialize_amd64_darwin_tdep;

  122. void
  123. ‌_initialize_amd64_darwin_tdep (void)
  124. {
  125.   gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64,
  126.                           GDB_OSABI_DARWIN, x86_darwin_init_abi_64);
  127. }