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123 lines
3.4 KiB
C
123 lines
3.4 KiB
C
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/* Target-dependent code for OpenBSD/i386.
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Copyright 1988, 1989, 1991, 1992, 1994, 1996, 2000, 2001, 2002
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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 2 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, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "arch-utils.h"
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#include "gdbcore.h"
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#include "regcache.h"
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#include "i386-tdep.h"
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#include "i387-tdep.h"
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/* Provide a prototype to silence -Wmissing-prototypes. */
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void _initialize_i386obsd_tdep (void);
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#define SIZEOF_STRUCT_REG (16 * 4)
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static void
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i386obsd_supply_reg (char *regs, int regno)
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{
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int i;
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for (i = 0; i <= 15; i++)
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if (regno == i || regno == -1)
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supply_register (i, regs + i * 4);
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}
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static void
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fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
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CORE_ADDR ignore)
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{
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char *regs, *fsave;
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/* We get everything from one section. */
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if (which != 0)
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return;
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if (core_reg_size < (SIZEOF_STRUCT_REG + 108))
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{
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warning ("Wrong size register set in core file.");
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return;
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}
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regs = core_reg_sect;
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fsave = core_reg_sect + SIZEOF_STRUCT_REG;
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/* Integer registers. */
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i386obsd_supply_reg (regs, -1);
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/* Floating point registers. */
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i387_supply_fsave (fsave);
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}
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static struct core_fns i386obsd_core_fns =
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{
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bfd_target_unknown_flavour, /* core_flavour */
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default_check_format, /* check_format */
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default_core_sniffer, /* core_sniffer */
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fetch_core_registers, /* core_read_registers */
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NULL /* next */
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};
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CORE_ADDR i386obsd_sigtramp_start = 0xbfbfdf20;
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CORE_ADDR i386obsd_sigtramp_end = 0xbfbfdff0;
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/* From <machine/signal.h>. */
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int i386obsd_sc_pc_offset = 44;
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int i386obsd_sc_sp_offset = 56;
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static void
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i386obsd_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 OpenBSD is BSD-based. */
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i386bsd_init_abi (info, gdbarch);
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/* OpenBSD uses -freg-struct-return by default. */
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tdep->struct_return = reg_struct_return;
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/* OpenBSD uses a different memory layout. */
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tdep->sigtramp_start = i386obsd_sigtramp_start;
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tdep->sigtramp_end = i386obsd_sigtramp_end;
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/* OpenBSD has a `struct sigcontext' that's different from the
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origional 4.3 BSD. */
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tdep->sc_pc_offset = i386obsd_sc_pc_offset;
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tdep->sc_sp_offset = i386obsd_sc_sp_offset;
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}
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void
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_initialize_i386obsd_tdep (void)
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{
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add_core_fns (&i386obsd_core_fns);
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/* FIXME: kettenis/20021020: Since OpenBSD/i386 binaries are
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indistingushable from NetBSD/i386 a.out binaries, building a GDB
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that should support both these targets will probably not work as
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expected. */
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#define GDB_OSABI_OPENBSD_AOUT GDB_OSABI_NETBSD_AOUT
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gdbarch_register_osabi (bfd_arch_i386, GDB_OSABI_OPENBSD_AOUT,
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i386obsd_init_abi);
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}
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