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[/] [scarts/] [trunk/] [toolchain/] [scarts-gdb/] [gdb-6.8/] [gdb/] [i386bsd-tdep.c] - Blame information for rev 25

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1 25 jlechner
/* Target-dependent code for i386 BSD's.
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   Copyright (C) 2001, 2002, 2003, 2004, 2007, 2008
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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 "regcache.h"
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#include "osabi.h"
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#include "gdb_string.h"
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#include "i386-tdep.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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i386bsd_sigcontext_addr (struct frame_info *next_frame)
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{
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  gdb_byte buf[4];
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  CORE_ADDR sp;
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  frame_unwind_register (next_frame, I386_ESP_REGNUM, buf);
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  sp = extract_unsigned_integer (buf, 4);
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  return read_memory_unsigned_integer (sp + 8, 4);
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}
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/* Support for shared libraries.  */
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/* Traditional BSD (4.3 BSD, still used for BSDI and 386BSD).  */
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/* From <machine/signal.h>.  */
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int i386bsd_sc_reg_offset[] =
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{
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  -1,                           /* %eax */
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  -1,                           /* %ecx */
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  -1,                           /* %edx */
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  -1,                           /* %ebx */
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  8 + 0 * 4,                     /* %esp */
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  8 + 1 * 4,                    /* %ebp */
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  -1,                           /* %esi */
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  -1,                           /* %edi */
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  8 + 3 * 4,                    /* %eip */
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  8 + 4 * 4,                    /* %eflags */
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  -1,                           /* %cs */
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  -1,                           /* %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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void
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i386bsd_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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  tdep->jb_pc_offset = 0;
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  tdep->sigtramp_start = 0xfdbfdfc0;
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  tdep->sigtramp_end = 0xfdbfe000;
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  tdep->sigcontext_addr = i386bsd_sigcontext_addr;
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  tdep->sc_reg_offset = i386bsd_sc_reg_offset;
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  tdep->sc_num_regs = ARRAY_SIZE (i386bsd_sc_reg_offset);
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}
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static enum gdb_osabi
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i386bsd_aout_osabi_sniffer (bfd *abfd)
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{
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  if (strcmp (bfd_get_target (abfd), "a.out-i386-netbsd") == 0)
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    return GDB_OSABI_NETBSD_AOUT;
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  if (strcmp (bfd_get_target (abfd), "a.out-i386-freebsd") == 0)
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    return GDB_OSABI_FREEBSD_AOUT;
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  return GDB_OSABI_UNKNOWN;
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}
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static enum gdb_osabi
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i386bsd_core_osabi_sniffer (bfd *abfd)
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{
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  if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0)
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    return GDB_OSABI_NETBSD_AOUT;
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  return GDB_OSABI_UNKNOWN;
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}
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/* Provide a prototype to silence -Wmissing-prototypes.  */
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void _initialize_i386bsd_tdep (void);
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void
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_initialize_i386bsd_tdep (void)
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{
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  gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_aout_flavour,
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                                  i386bsd_aout_osabi_sniffer);
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  /* BFD doesn't set a flavour for NetBSD style a.out core files.  */
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  gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_unknown_flavour,
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                                  i386bsd_core_osabi_sniffer);
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}

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