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[/] [openrisc/] [trunk/] [gnu-old/] [gdb-7.1/] [gdb/] [amd64nbsd-tdep.c] - Blame information for rev 842

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1 227 jeremybenn
/* Target-dependent code for NetBSD/amd64.
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   Copyright (C) 2003, 2004, 2007, 2008, 2009, 2010
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   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 "osabi.h"
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#include "symtab.h"
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#include "gdb_assert.h"
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#include "amd64-tdep.h"
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#include "nbsd-tdep.h"
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#include "solib-svr4.h"
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/* Support for signal handlers.  */
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/* Return whether THIS_FRAME corresponds to a NetBSD sigtramp
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   routine.  */
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static int
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amd64nbsd_sigtramp_p (struct frame_info *this_frame)
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{
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  CORE_ADDR pc = get_frame_pc (this_frame);
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  char *name;
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  find_pc_partial_function (pc, &name, NULL, NULL);
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  return nbsd_pc_in_sigtramp (pc, name);
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}
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/* Assuming THIS_FRAME corresponds to a NetBSD sigtramp routine,
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   return the address of the associated mcontext structure.  */
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static CORE_ADDR
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amd64nbsd_mcontext_addr (struct frame_info *this_frame)
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{
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  CORE_ADDR addr;
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  /* The register %r15 points at `struct ucontext' upon entry of a
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     signal trampoline.  */
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  addr = get_frame_register_unsigned (this_frame, AMD64_R15_REGNUM);
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  /* The mcontext structure lives as offset 56 in `struct ucontext'.  */
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  return addr + 56;
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}
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/* NetBSD 2.0 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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/* From <machine/reg.h>.  */
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int amd64nbsd_r_reg_offset[] =
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{
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  14 * 8,                       /* %rax */
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  13 * 8,                       /* %rbx */
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  3 * 8,                        /* %rcx */
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  2 * 8,                        /* %rdx */
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  1 * 8,                        /* %rsi */
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  12 * 8,                       /* %rbp */
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  24 * 8,                       /* %rsp */
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  4 * 8,                        /* %r8 .. */
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  5 * 8,
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  6 * 8,
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  7 * 8,
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  8 * 8,
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  9 * 8,
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  10 * 8,
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  11 * 8,                       /* ... %r15 */
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  21 * 8,                       /* %rip */
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  23 * 8,                       /* %eflags */
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  22 * 8,                       /* %cs */
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  25 * 8,                       /* %ss */
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  18 * 8,                       /* %ds */
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  17 * 8,                       /* %es */
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  16 * 8,                       /* %fs */
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  15 * 8                        /* %gs */
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};
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static void
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amd64nbsd_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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  /* Initialize general-purpose register set details first.  */
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  tdep->gregset_reg_offset = amd64nbsd_r_reg_offset;
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  tdep->gregset_num_regs = ARRAY_SIZE (amd64nbsd_r_reg_offset);
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  tdep->sizeof_gregset = 26 * 8;
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  amd64_init_abi (info, gdbarch);
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  tdep->jb_pc_offset = 7 * 8;
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  /* NetBSD has its own convention for signal trampolines.  */
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  tdep->sigtramp_p = amd64nbsd_sigtramp_p;
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  tdep->sigcontext_addr = amd64nbsd_mcontext_addr;
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  tdep->sc_reg_offset = amd64nbsd_r_reg_offset;
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  tdep->sc_num_regs = ARRAY_SIZE (amd64nbsd_r_reg_offset);
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  /* NetBSD 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_amd64nbsd_tdep (void);
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void
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_initialize_amd64nbsd_tdep (void)
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{
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  /* The NetBSD/amd64 native dependent code makes this assumption.  */
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  gdb_assert (ARRAY_SIZE (amd64nbsd_r_reg_offset) == AMD64_NUM_GREGS);
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  gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64,
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                          GDB_OSABI_NETBSD_ELF, amd64nbsd_init_abi);
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}

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