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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [gdb/] [amd64fbsd-tdep.c] - Blame information for rev 178

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Line No. Rev Author Line
1 24 jeremybenn
/* Target-dependent code for FreeBSD/amd64.
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   Copyright (C) 2003, 2004, 2005, 2007, 2008 Free Software Foundation, Inc.
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   This file is part of GDB.
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   This program is free software; you can redistribute it and/or modify
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   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 3 of the License, or
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   (at your option) any later version.
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   This program is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   GNU General Public License for more details.
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   You should have received a copy of the GNU General Public License
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   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
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#include "defs.h"
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#include "arch-utils.h"
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#include "frame.h"
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#include "gdbcore.h"
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#include "regcache.h"
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#include "osabi.h"
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#include "gdb_assert.h"
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#include "gdb_string.h"
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#include "amd64-tdep.h"
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#include "bsd-uthread.h"
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#include "solib-svr4.h"
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/* Support for signal handlers.  */
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/* Assuming NEXT_FRAME is for a frame following a BSD sigtramp
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   routine, return the address of the associated sigcontext structure.  */
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static CORE_ADDR
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amd64fbsd_sigcontext_addr (struct frame_info *next_frame)
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{
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  CORE_ADDR sp;
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  /* The `struct sigcontext' (which really is an `ucontext_t' on
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     FreeBSD/amd64) lives at a fixed offset in the signal frame.  See
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     <machine/sigframe.h>.  */
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  sp = frame_unwind_register_unsigned (next_frame, AMD64_RSP_REGNUM);
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  return sp + 16;
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}
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/* FreeBSD 5.1-RELEASE or later.  */
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/* Mapping between the general-purpose registers in `struct reg'
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   format and GDB's register cache layout.
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   Note that some registers are 32-bit, but since we're little-endian
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   we get away with that.  */
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/* From <machine/reg.h>.  */
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static int amd64fbsd_r_reg_offset[] =
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{
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  14 * 8,                       /* %rax */
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  11 * 8,                       /* %rbx */
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  13 * 8,                       /* %rcx */
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  12 * 8,                       /* %rdx */
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  9 * 8,                        /* %rsi */
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  8 * 8,                        /* %rdi */
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  10 * 8,                       /* %rbp */
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  20 * 8,                       /* %rsp */
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  7 * 8,                        /* %r8 ... */
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  6 * 8,
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  5 * 8,
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  4 * 8,
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  3 * 8,
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  2 * 8,
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  1 * 8,
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  17 * 8,                       /* %rip */
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  19 * 8,                       /* %eflags */
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  18 * 8,                       /* %cs */
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  21 * 8,                       /* %ss */
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  -1,                           /* %ds */
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  -1,                           /* %es */
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  -1,                           /* %fs */
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  -1                            /* %gs */
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};
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/* Location of the signal trampoline.  */
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CORE_ADDR amd64fbsd_sigtramp_start_addr = 0x7fffffffffc0ULL;
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CORE_ADDR amd64fbsd_sigtramp_end_addr = 0x7fffffffffe0ULL;
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/* From <machine/signal.h>.  */
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int amd64fbsd_sc_reg_offset[] =
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{
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  24 + 6 * 8,                   /* %rax */
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  24 + 7 * 8,                   /* %rbx */
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  24 + 3 * 8,                   /* %rcx */
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  24 + 2 * 8,                   /* %rdx */
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  24 + 1 * 8,                   /* %rsi */
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  24 + 0 * 8,                    /* %rdi */
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  24 + 8 * 8,                   /* %rbp */
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  24 + 22 * 8,                  /* %rsp */
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  24 + 4 * 8,                   /* %r8 ... */
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  24 + 5 * 8,
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  24 + 9 * 8,
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  24 + 10 * 8,
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  24 + 11 * 8,
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  24 + 12 * 8,
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  24 + 13 * 8,
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  24 + 14 * 8,                  /* ... %r15 */
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  24 + 19 * 8,                  /* %rip */
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  24 + 21 * 8,                  /* %eflags */
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  24 + 20 * 8,                  /* %cs */
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  24 + 23 * 8,                  /* %ss */
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  -1,                           /* %ds */
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  -1,                           /* %es */
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  -1,                           /* %fs */
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  -1                            /* %gs */
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};
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/* From /usr/src/lib/libc/amd64/gen/_setjmp.S.  */
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static int amd64fbsd_jmp_buf_reg_offset[] =
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{
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  -1,                           /* %rax */
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  1 * 8,                        /* %rbx */
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  -1,                           /* %rcx */
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  -1,                           /* %rdx */
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  -1,                           /* %rsi */
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  -1,                           /* %rdi */
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  3 * 8,                        /* %rbp */
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  2 * 8,                        /* %rsp */
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  -1,                           /* %r8 ... */
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  -1,
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  -1,
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  -1,                           /* ... %r11 */
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  4 * 8,                        /* %r12 ... */
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  5 * 8,
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  6 * 8,
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  7 * 8,                        /* ... %r15 */
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};
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static void
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amd64fbsd_supply_uthread (struct regcache *regcache,
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                          int regnum, CORE_ADDR addr)
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{
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  gdb_byte buf[8];
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  int i;
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  gdb_assert (regnum >= -1);
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  for (i = 0; i < ARRAY_SIZE (amd64fbsd_jmp_buf_reg_offset); i++)
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    {
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      if (amd64fbsd_jmp_buf_reg_offset[i] != -1
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          && (regnum == -1 || regnum == i))
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        {
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          read_memory (addr + amd64fbsd_jmp_buf_reg_offset[i], buf, 8);
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          regcache_raw_supply (regcache, i, buf);
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        }
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    }
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}
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static void
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amd64fbsd_collect_uthread (const struct regcache *regcache,
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                           int regnum, CORE_ADDR addr)
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{
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  gdb_byte buf[8];
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  int i;
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  gdb_assert (regnum >= -1);
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  for (i = 0; i < ARRAY_SIZE (amd64fbsd_jmp_buf_reg_offset); i++)
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    {
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      if (amd64fbsd_jmp_buf_reg_offset[i] != -1
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          && (regnum == -1 || regnum == i))
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        {
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          regcache_raw_collect (regcache, i, buf);
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          write_memory (addr + amd64fbsd_jmp_buf_reg_offset[i], buf, 8);
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        }
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    }
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}
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void
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amd64fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
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{
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  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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  /* Obviously FreeBSD is BSD-based.  */
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  i386bsd_init_abi (info, gdbarch);
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  tdep->gregset_reg_offset = amd64fbsd_r_reg_offset;
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  tdep->gregset_num_regs = ARRAY_SIZE (amd64fbsd_r_reg_offset);
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  tdep->sizeof_gregset = 22 * 8;
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  amd64_init_abi (info, gdbarch);
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  tdep->sigtramp_start = amd64fbsd_sigtramp_start_addr;
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  tdep->sigtramp_end = amd64fbsd_sigtramp_end_addr;
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  tdep->sigcontext_addr = amd64fbsd_sigcontext_addr;
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  tdep->sc_reg_offset = amd64fbsd_sc_reg_offset;
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  tdep->sc_num_regs = ARRAY_SIZE (amd64fbsd_sc_reg_offset);
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  /* FreeBSD provides a user-level threads implementation.  */
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  bsd_uthread_set_supply_uthread (gdbarch, amd64fbsd_supply_uthread);
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  bsd_uthread_set_collect_uthread (gdbarch, amd64fbsd_collect_uthread);
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  /* FreeBSD uses SVR4-style shared libraries.  */
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  set_solib_svr4_fetch_link_map_offsets
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    (gdbarch, svr4_lp64_fetch_link_map_offsets);
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}
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/* Provide a prototype to silence -Wmissing-prototypes.  */
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void _initialize_amd64fbsd_tdep (void);
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void
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_initialize_amd64fbsd_tdep (void)
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{
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  gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64,
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                          GDB_OSABI_FREEBSD_ELF, amd64fbsd_init_abi);
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}

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