| /* Target-dependent code for OpenBSD/i386. |
| Copyright 1988, 1989, 1991, 1992, 1994, 1996, 2000, 2001, 2002, 2003 |
| Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #include "defs.h" |
| #include "arch-utils.h" |
| #include "gdbcore.h" |
| #include "regcache.h" |
| #include "osabi.h" |
| |
| #include "i386-tdep.h" |
| #include "i387-tdep.h" |
| |
| /* Provide a prototype to silence -Wmissing-prototypes. */ |
| void _initialize_i386obsd_tdep (void); |
| |
| #define SIZEOF_STRUCT_REG (16 * 4) |
| |
| static void |
| i386obsd_supply_reg (char *regs, int regno) |
| { |
| int i; |
| |
| for (i = 0; i <= 15; i++) |
| if (regno == i || regno == -1) |
| supply_register (i, regs + i * 4); |
| } |
| |
| static void |
| fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which, |
| CORE_ADDR ignore) |
| { |
| char *regs, *fsave; |
| |
| /* We get everything from one section. */ |
| if (which != 0) |
| return; |
| |
| if (core_reg_size < (SIZEOF_STRUCT_REG + 108)) |
| { |
| warning ("Wrong size register set in core file."); |
| return; |
| } |
| |
| regs = core_reg_sect; |
| fsave = core_reg_sect + SIZEOF_STRUCT_REG; |
| |
| /* Integer registers. */ |
| i386obsd_supply_reg (regs, -1); |
| |
| /* Floating point registers. */ |
| i387_supply_fsave (fsave); |
| } |
| |
| static struct core_fns i386obsd_core_fns = |
| { |
| bfd_target_unknown_flavour, /* core_flavour */ |
| default_check_format, /* check_format */ |
| default_core_sniffer, /* core_sniffer */ |
| fetch_core_registers, /* core_read_registers */ |
| NULL /* next */ |
| }; |
| |
| |
| CORE_ADDR i386obsd_sigtramp_start = 0xbfbfdf20; |
| CORE_ADDR i386obsd_sigtramp_end = 0xbfbfdff0; |
| |
| /* From <machine/signal.h>. */ |
| int i386obsd_sc_pc_offset = 44; |
| int i386obsd_sc_sp_offset = 56; |
| |
| static void |
| i386obsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) |
| { |
| struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| |
| /* Obviously OpenBSD is BSD-based. */ |
| i386bsd_init_abi (info, gdbarch); |
| |
| /* OpenBSD uses -freg-struct-return by default. */ |
| tdep->struct_return = reg_struct_return; |
| |
| /* OpenBSD uses a different memory layout. */ |
| tdep->sigtramp_start = i386obsd_sigtramp_start; |
| tdep->sigtramp_end = i386obsd_sigtramp_end; |
| |
| /* OpenBSD has a `struct sigcontext' that's different from the |
| origional 4.3 BSD. */ |
| tdep->sc_pc_offset = i386obsd_sc_pc_offset; |
| tdep->sc_sp_offset = i386obsd_sc_sp_offset; |
| } |
| |
| void |
| _initialize_i386obsd_tdep (void) |
| { |
| add_core_fns (&i386obsd_core_fns); |
| |
| /* FIXME: kettenis/20021020: Since OpenBSD/i386 binaries are |
| indistingushable from NetBSD/i386 a.out binaries, building a GDB |
| that should support both these targets will probably not work as |
| expected. */ |
| #define GDB_OSABI_OPENBSD_AOUT GDB_OSABI_NETBSD_AOUT |
| |
| gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_OPENBSD_AOUT, |
| i386obsd_init_abi); |
| } |