Commit | Line | Data |
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b7247919 | 1 | /* Target-dependent code for i386 BSD's. |
8a96bc77 | 2 | |
0fb0cc75 | 3 | Copyright (C) 2001, 2002, 2003, 2004, 2007, 2008, 2009 |
9b254dd1 | 4 | Free Software Foundation, Inc. |
b7247919 MK |
5 | |
6 | This file is part of GDB. | |
7 | ||
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 | |
a9762ec7 | 10 | the Free Software Foundation; either version 3 of the License, or |
b7247919 MK |
11 | (at your option) any later version. |
12 | ||
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. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
b7247919 MK |
20 | |
21 | #include "defs.h" | |
9c5045b5 | 22 | #include "arch-utils.h" |
b7247919 MK |
23 | #include "frame.h" |
24 | #include "gdbcore.h" | |
25 | #include "regcache.h" | |
4be87837 | 26 | #include "osabi.h" |
b7247919 | 27 | |
ca39387d MK |
28 | #include "gdb_string.h" |
29 | ||
8201327c | 30 | #include "i386-tdep.h" |
b7247919 | 31 | |
8201327c | 32 | /* Support for signal handlers. */ |
b7247919 | 33 | |
10458914 DJ |
34 | /* Assuming THIS_FRAME is for a BSD sigtramp routine, return the |
35 | address of the associated sigcontext structure. */ | |
b7247919 | 36 | |
acd5c798 | 37 | static CORE_ADDR |
10458914 | 38 | i386bsd_sigcontext_addr (struct frame_info *this_frame) |
b7247919 | 39 | { |
63c0089f | 40 | gdb_byte buf[4]; |
acd5c798 | 41 | CORE_ADDR sp; |
b4700d91 | 42 | |
10458914 | 43 | get_frame_register (this_frame, I386_ESP_REGNUM, buf); |
acd5c798 | 44 | sp = extract_unsigned_integer (buf, 4); |
b7247919 | 45 | |
acd5c798 | 46 | return read_memory_unsigned_integer (sp + 8, 4); |
b7247919 | 47 | } |
8201327c MK |
48 | \f |
49 | ||
9c5045b5 MK |
50 | /* Support for shared libraries. */ |
51 | ||
8201327c MK |
52 | /* Traditional BSD (4.3 BSD, still used for BSDI and 386BSD). */ |
53 | ||
54 | /* From <machine/signal.h>. */ | |
155c1d33 | 55 | int i386bsd_sc_reg_offset[] = |
a3386186 MK |
56 | { |
57 | -1, /* %eax */ | |
58 | -1, /* %ecx */ | |
59 | -1, /* %edx */ | |
60 | -1, /* %ebx */ | |
61 | 8 + 0 * 4, /* %esp */ | |
62 | 8 + 1 * 4, /* %ebp */ | |
63 | -1, /* %esi */ | |
64 | -1, /* %edi */ | |
65 | 8 + 3 * 4, /* %eip */ | |
66 | 8 + 4 * 4, /* %eflags */ | |
67 | -1, /* %cs */ | |
68 | -1, /* %ss */ | |
69 | -1, /* %ds */ | |
70 | -1, /* %es */ | |
71 | -1, /* %fs */ | |
72 | -1 /* %gs */ | |
73 | }; | |
8201327c | 74 | |
3cac699e | 75 | void |
8201327c MK |
76 | i386bsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) |
77 | { | |
78 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
79 | ||
8201327c MK |
80 | tdep->jb_pc_offset = 0; |
81 | ||
8201327c MK |
82 | tdep->sigtramp_start = 0xfdbfdfc0; |
83 | tdep->sigtramp_end = 0xfdbfe000; | |
21d0e8a4 | 84 | tdep->sigcontext_addr = i386bsd_sigcontext_addr; |
a3386186 | 85 | tdep->sc_reg_offset = i386bsd_sc_reg_offset; |
155c1d33 | 86 | tdep->sc_num_regs = ARRAY_SIZE (i386bsd_sc_reg_offset); |
8201327c MK |
87 | } |
88 | ||
8201327c MK |
89 | \f |
90 | static enum gdb_osabi | |
91 | i386bsd_aout_osabi_sniffer (bfd *abfd) | |
92 | { | |
93 | if (strcmp (bfd_get_target (abfd), "a.out-i386-netbsd") == 0) | |
94 | return GDB_OSABI_NETBSD_AOUT; | |
95 | ||
96 | if (strcmp (bfd_get_target (abfd), "a.out-i386-freebsd") == 0) | |
97 | return GDB_OSABI_FREEBSD_AOUT; | |
98 | ||
99 | return GDB_OSABI_UNKNOWN; | |
100 | } | |
101 | ||
f6943e4a MK |
102 | static enum gdb_osabi |
103 | i386bsd_core_osabi_sniffer (bfd *abfd) | |
104 | { | |
105 | if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0) | |
106 | return GDB_OSABI_NETBSD_AOUT; | |
107 | ||
108 | return GDB_OSABI_UNKNOWN; | |
109 | } | |
110 | ||
8201327c MK |
111 | \f |
112 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
113 | void _initialize_i386bsd_tdep (void); | |
114 | ||
115 | void | |
116 | _initialize_i386bsd_tdep (void) | |
117 | { | |
118 | gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_aout_flavour, | |
119 | i386bsd_aout_osabi_sniffer); | |
f6943e4a | 120 | |
8b0c3633 MK |
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, | |
f6943e4a | 123 | i386bsd_core_osabi_sniffer); |
8201327c | 124 | } |