gdb/i386-darwin-tdep.c

   1 /* Darwin support for GDB, the GNU debugger.
   2    Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2005, 2008, 2009
   3    Free Software Foundation, Inc.
   4
   5    Contributed by Apple Computer, Inc.
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  21
  22 #include "defs.h"
  23 #include "frame.h"
  24 #include "inferior.h"
  25 #include "gdbcore.h"
  26 #include "target.h"
  27 #include "floatformat.h"
  28 #include "symtab.h"
  29 #include "regcache.h"
  30 #include "libbfd.h"
  31 #include "objfiles.h"
  32
  33 #include "i387-tdep.h"
  34 #include "i386-tdep.h"
  35 #include "amd64-tdep.h"
  36 #include "osabi.h"
  37 #include "ui-out.h"
  38 #include "symtab.h"
  39 #include "frame.h"
  40 #include "gdb_assert.h"
  41 #include "i386-darwin-tdep.h"
  42 #include "solib.h"
  43 #include "solib-darwin.h"
  44
  45 /* Offsets into the struct i386_thread_state where we'll find the saved regs.
  46    From <mach/i386/thread_status.h> and i386-tdep.h.  */
  47 int i386_darwin_thread_state_reg_offset[] =
  48 {
  49    0 * 4,   /* EAX */
  50    2 * 4,   /* ECX */
  51    3 * 4,   /* EDX */
  52    1 * 4,   /* EBX */
  53    7 * 4,   /* ESP */
  54    6 * 4,   /* EBP */
  55    5 * 4,   /* ESI */
  56    4 * 4,   /* EDI */
  57   10 * 4,   /* EIP */
  58    9 * 4,   /* EFLAGS */
  59   11 * 4,   /* CS */
  60    8,       /* SS */
  61   12 * 4,   /* DS */
  62   13 * 4,   /* ES */
  63   14 * 4,   /* FS */
  64   15 * 4    /* GS */
  65 };
  66
  67 const int i386_darwin_thread_state_num_regs =
  68   ARRAY_SIZE (i386_darwin_thread_state_reg_offset);
  69
  70 /* Offsets into the struct x86_thread_state64 where we'll find the saved regs.
  71    From <mach/i386/thread_status.h> and amd64-tdep.h.  */
  72 int amd64_darwin_thread_state_reg_offset[] =
  73 {
  74   0 * 8,                        /* %rax */
  75   1 * 8,                        /* %rbx */
  76   2 * 8,                        /* %rcx */
  77   3 * 8,                        /* %rdx */
  78   5 * 8,                        /* %rsi */
  79   4 * 8,                        /* %rdi */
  80   6 * 8,                        /* %rbp */
  81   7 * 8,                        /* %rsp */
  82   8 * 8,                        /* %r8 ... */
  83   9 * 8,
  84   10 * 8,
  85   11 * 8,
  86   12 * 8,
  87   13 * 8,
  88   14 * 8,
  89   15 * 8,                       /* ... %r15 */
  90   16 * 8,                       /* %rip */
  91   17 * 8,                       /* %rflags */
  92   18 * 8,                       /* %cs */
  93   -1,                           /* %ss */
  94   -1,                           /* %ds */
  95   -1,                           /* %es */
  96   19 * 8,                       /* %fs */
  97   20 * 8                        /* %gs */
  98 };
  99
 100 const int amd64_darwin_thread_state_num_regs =
 101   ARRAY_SIZE (amd64_darwin_thread_state_reg_offset);
 102
 103 static void
 104 i386_darwin_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 105 {
 106   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
 107
 108   /* We support the SSE registers.  */
 109   tdep->num_xmm_regs = I386_NUM_XREGS - 1;
 110   set_gdbarch_num_regs (gdbarch, I386_SSE_NUM_REGS);
 111
 112   tdep->struct_return = reg_struct_return;
 113
 114   tdep->sigcontext_addr = NULL;
 115   tdep->sc_reg_offset = i386_darwin_thread_state_reg_offset;
 116   tdep->sc_num_regs = 16;
 117
 118   tdep->jb_pc_offset = 20;
 119
 120   set_solib_ops (gdbarch, &darwin_so_ops);
 121 }
 122
 123 static void
 124 x86_darwin_init_abi_64 (struct gdbarch_info info, struct gdbarch *gdbarch)
 125 {
 126   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
 127
 128   amd64_init_abi (info, gdbarch);
 129
 130   tdep->struct_return = reg_struct_return;
 131
 132   /* We don't do signals yet.  */
 133   tdep->sigcontext_addr = NULL;
 134   tdep->sc_reg_offset = amd64_darwin_thread_state_reg_offset;
 135   tdep->sc_num_regs = ARRAY_SIZE (amd64_darwin_thread_state_reg_offset);
 136
 137   tdep->jb_pc_offset = 148;
 138
 139   set_solib_ops (gdbarch, &darwin_so_ops);
 140 }
 141
 142 static enum gdb_osabi
 143 i386_mach_o_osabi_sniffer (bfd *abfd)
 144 {
 145   if (!bfd_check_format (abfd, bfd_object))
 146     return GDB_OSABI_UNKNOWN;
 147
 148   if (bfd_get_arch (abfd) == bfd_arch_i386)
 149     return GDB_OSABI_DARWIN;
 150
 151   return GDB_OSABI_UNKNOWN;
 152 }
 153
 154 void
 155 _initialize_i386_darwin_tdep (void)
 156 {
 157   gdbarch_register_osabi_sniffer (bfd_arch_unknown, bfd_target_mach_o_flavour,
 158                                   i386_mach_o_osabi_sniffer);
 159
 160   gdbarch_register_osabi (bfd_arch_i386, bfd_mach_i386_i386,
 161                           GDB_OSABI_DARWIN, i386_darwin_init_abi);
 162
 163   gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64,
 164                           GDB_OSABI_DARWIN, x86_darwin_init_abi_64);
 165 }