gdb/amd64fbsd-tdep.c

   1 /* Target-dependent code for FreeBSD/amd64.
   2    Copyright 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 "arch-utils.h"
  23 #include "frame.h"
  24 #include "gdbcore.h"
  25 #include "regcache.h"
  26 #include "osabi.h"
  27
  28 #include "gdb_string.h"
  29
  30 #include "x86-64-tdep.h"
  31
  32 /* Support for signal handlers.  */
  33
  34 /* Assuming NEXT_FRAME is for a frame following a BSD sigtramp
  35    routine, return the address of the associated sigcontext structure.  */
  36
  37 static CORE_ADDR
  38 amd64fbsd_sigcontext_addr (struct frame_info *next_frame)
  39 {
  40   CORE_ADDR sp;
  41
  42   /* The `struct sigcontext' (which really is an `ucontext_t' on
  43      FreeBSD/amd64) lives at a fixed offset in the signal frame.  See
  44      <machine/sigframe.h>.  */
  45   sp = frame_unwind_register_unsigned (next_frame, X86_64_RSP_REGNUM);
  46   return sp + 16;
  47 }
  48 \f
  49 /* FreeBSD 5.1-RELEASE or later.  */
  50
  51 /* Location of the signal trampoline.  */
  52 CORE_ADDR amd64fbsd_sigtramp_start = 0x7fffffffffc0;
  53 CORE_ADDR amd64fbsd_sigtramp_end = 0x7fffffffffe0;
  54
  55 /* From <machine/signal.h>.  */
  56 int amd64fbsd_sc_reg_offset[X86_64_NUM_GREGS] =
  57 {
  58   24 + 6 * 8,                   /* %rax */
  59   24 + 7 * 8,                   /* %rbx */
  60   24 + 3 * 8,                   /* %rcx */
  61   24 + 2 * 8,                   /* %rdx */
  62   24 + 1 * 8,                   /* %rsi */
  63   24 + 0 * 8,                   /* %rdi */
  64   24 + 8 * 8,                   /* %rbp */
  65   24 + 21 * 8,                  /* %rsp */
  66   24 + 4 * 8,                   /* %r8 */
  67   24 + 5 * 8,                   /* %r9 */
  68   24 + 9 * 8,                   /* %r10 */
  69   24 + 10 * 8,                  /* %r11 */
  70   24 + 11 * 8,                  /* %r12 */
  71   24 + 12 * 8,                  /* %r13 */
  72   24 + 13 * 8,                  /* %r14 */
  73   24 + 14 * 8,                  /* %r15 */
  74   24 + 18 * 8,                  /* %rip */
  75   24 + 20 * 8,                  /* %eflags */
  76   -1,                           /* %ds */
  77   -1,                           /* %es */
  78   -1,                           /* %fs */
  79   -1                            /* %gs */
  80 };
  81
  82 void
  83 amd64fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
  84 {
  85   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
  86
  87   /* Obviously FreeBSD is BSD-based.  */
  88   i386bsd_init_abi (info, gdbarch);
  89
  90   x86_64_init_abi (info, gdbarch);
  91
  92   tdep->sigtramp_start = amd64fbsd_sigtramp_start;
  93   tdep->sigtramp_end = amd64fbsd_sigtramp_end;
  94   tdep->sigcontext_addr = amd64fbsd_sigcontext_addr;
  95   tdep->sc_reg_offset = amd64fbsd_sc_reg_offset;
  96   tdep->sc_num_regs = X86_64_NUM_GREGS;
  97 }
  98 \f
  99
 100 /* Provide a prototype to silence -Wmissing-prototypes.  */
 101 void _initialize_amd64fbsd_tdep (void);
 102
 103 void
 104 _initialize_amd64fbsd_tdep (void)
 105 {
 106   gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64,
 107                           GDB_OSABI_FREEBSD_ELF, amd64fbsd_init_abi);
 108 }