1 /* Target-dependent code for i386 BSD's.
3 Copyright (C) 2001, 2002, 2003, 2004, 2007, 2008, 2009
4 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #include "arch-utils.h"
28 #include "gdb_string.h"
30 #include "i386-tdep.h"
32 /* Support for signal handlers. */
34 /* Assuming THIS_FRAME is for a BSD sigtramp routine, return the
35 address of the associated sigcontext structure. */
38 i386bsd_sigcontext_addr (struct frame_info *this_frame)
43 get_frame_register (this_frame, I386_ESP_REGNUM, buf);
44 sp = extract_unsigned_integer (buf, 4);
46 return read_memory_unsigned_integer (sp + 8, 4);
50 /* Support for shared libraries. */
52 /* Traditional BSD (4.3 BSD, still used for BSDI and 386BSD). */
54 /* From <machine/signal.h>. */
55 int i386bsd_sc_reg_offset[] =
66 8 + 4 * 4, /* %eflags */
76 i386bsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
78 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
80 tdep->jb_pc_offset = 0;
82 tdep->sigtramp_start = 0xfdbfdfc0;
83 tdep->sigtramp_end = 0xfdbfe000;
84 tdep->sigcontext_addr = i386bsd_sigcontext_addr;
85 tdep->sc_reg_offset = i386bsd_sc_reg_offset;
86 tdep->sc_num_regs = ARRAY_SIZE (i386bsd_sc_reg_offset);
91 i386bsd_aout_osabi_sniffer (bfd *abfd)
93 if (strcmp (bfd_get_target (abfd), "a.out-i386-netbsd") == 0)
94 return GDB_OSABI_NETBSD_AOUT;
96 if (strcmp (bfd_get_target (abfd), "a.out-i386-freebsd") == 0)
97 return GDB_OSABI_FREEBSD_AOUT;
99 return GDB_OSABI_UNKNOWN;
102 static enum gdb_osabi
103 i386bsd_core_osabi_sniffer (bfd *abfd)
105 if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0)
106 return GDB_OSABI_NETBSD_AOUT;
108 return GDB_OSABI_UNKNOWN;
112 /* Provide a prototype to silence -Wmissing-prototypes. */
113 void _initialize_i386bsd_tdep (void);
116 _initialize_i386bsd_tdep (void)
118 gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_aout_flavour,
119 i386bsd_aout_osabi_sniffer);
121 /* BFD doesn't set a flavour for NetBSD style a.out core files. */
122 gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_unknown_flavour,
123 i386bsd_core_osabi_sniffer);