1 /* Target-dependent code for i386 BSD's.
3 Copyright (C) 2001, 2002, 2003, 2004, 2007 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21 #include "arch-utils.h"
27 #include "gdb_string.h"
29 #include "i386-tdep.h"
31 /* Support for signal handlers. */
33 /* Assuming NEXT_FRAME is for a frame following a BSD sigtramp
34 routine, return the address of the associated sigcontext structure. */
37 i386bsd_sigcontext_addr (struct frame_info *next_frame)
42 frame_unwind_register (next_frame, I386_ESP_REGNUM, buf);
43 sp = extract_unsigned_integer (buf, 4);
45 return read_memory_unsigned_integer (sp + 8, 4);
49 /* Support for shared libraries. */
51 /* Traditional BSD (4.3 BSD, still used for BSDI and 386BSD). */
53 /* From <machine/signal.h>. */
54 int i386bsd_sc_reg_offset[] =
65 8 + 4 * 4, /* %eflags */
75 i386bsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
77 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
79 tdep->jb_pc_offset = 0;
81 tdep->sigtramp_start = 0xfdbfdfc0;
82 tdep->sigtramp_end = 0xfdbfe000;
83 tdep->sigcontext_addr = i386bsd_sigcontext_addr;
84 tdep->sc_reg_offset = i386bsd_sc_reg_offset;
85 tdep->sc_num_regs = ARRAY_SIZE (i386bsd_sc_reg_offset);
90 i386bsd_aout_osabi_sniffer (bfd *abfd)
92 if (strcmp (bfd_get_target (abfd), "a.out-i386-netbsd") == 0)
93 return GDB_OSABI_NETBSD_AOUT;
95 if (strcmp (bfd_get_target (abfd), "a.out-i386-freebsd") == 0)
96 return GDB_OSABI_FREEBSD_AOUT;
98 return GDB_OSABI_UNKNOWN;
101 static enum gdb_osabi
102 i386bsd_core_osabi_sniffer (bfd *abfd)
104 if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0)
105 return GDB_OSABI_NETBSD_AOUT;
107 return GDB_OSABI_UNKNOWN;
111 /* Provide a prototype to silence -Wmissing-prototypes. */
112 void _initialize_i386bsd_tdep (void);
115 _initialize_i386bsd_tdep (void)
117 gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_aout_flavour,
118 i386bsd_aout_osabi_sniffer);
120 /* BFD doesn't set a flavour for NetBSD style a.out core files. */
121 gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_unknown_flavour,
122 i386bsd_core_osabi_sniffer);