Commit | Line | Data |
---|---|---|
005328e3 | 1 | /* Target-dependent code for OpenBSD/i386. |
67457012 | 2 | |
4be87837 | 3 | Copyright 1988, 1989, 1991, 1992, 1994, 1996, 2000, 2001, 2002, 2003 |
005328e3 MK |
4 | Free Software Foundation, Inc. |
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 | |
10 | the Free Software Foundation; either version 2 of the License, or | |
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 | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, | |
21 | Boston, MA 02111-1307, USA. */ | |
22 | ||
23 | #include "defs.h" | |
24 | #include "arch-utils.h" | |
25 | #include "gdbcore.h" | |
26 | #include "regcache.h" | |
67457012 | 27 | #include "regset.h" |
4be87837 | 28 | #include "osabi.h" |
005328e3 | 29 | |
67457012 MK |
30 | #include "gdb_assert.h" |
31 | #include "gdb_string.h" | |
32 | ||
005328e3 MK |
33 | #include "i386-tdep.h" |
34 | #include "i387-tdep.h" | |
35 | ||
67457012 MK |
36 | /* From <machine/reg.h>. */ |
37 | static int i386obsd_r_reg_offset[] = | |
38 | { | |
39 | 0 * 4, /* %eax */ | |
40 | 1 * 4, /* %ecx */ | |
41 | 2 * 4, /* %edx */ | |
42 | 3 * 4, /* %ebx */ | |
43 | 4 * 4, /* %esp */ | |
44 | 5 * 4, /* %ebp */ | |
45 | 6 * 4, /* %esi */ | |
46 | 7 * 4, /* %edi */ | |
47 | 8 * 4, /* %eip */ | |
48 | 9 * 4, /* %eflags */ | |
49 | 10 * 4, /* %cs */ | |
50 | 11 * 4, /* %ss */ | |
51 | 12 * 4, /* %ds */ | |
52 | 13 * 4, /* %es */ | |
53 | 14 * 4, /* %fs */ | |
54 | 15 * 4 /* %gs */ | |
55 | }; | |
005328e3 MK |
56 | |
57 | static void | |
67457012 MK |
58 | i386obsd_aout_supply_regset (const struct regset *regset, |
59 | struct regcache *regcache, int regnum, | |
60 | const void *regs, size_t len) | |
005328e3 | 61 | { |
67457012 MK |
62 | const struct gdbarch_tdep *tdep = regset->descr; |
63 | ||
64 | gdb_assert (len >= tdep->sizeof_gregset + I387_SIZEOF_FSAVE); | |
005328e3 | 65 | |
67457012 MK |
66 | i386_supply_gregset (regset, regcache, regnum, regs, tdep->sizeof_gregset); |
67 | i387_supply_fsave (regcache, regnum, (char *) regs + tdep->sizeof_gregset); | |
005328e3 MK |
68 | } |
69 | ||
67457012 MK |
70 | const struct regset * |
71 | i386obsd_aout_regset_from_core_section (struct gdbarch *gdbarch, | |
72 | const char *sect_name, | |
73 | size_t sect_size) | |
005328e3 | 74 | { |
67457012 | 75 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
005328e3 | 76 | |
67457012 MK |
77 | /* OpenBSD a.out core dumps don't use seperate register sets for the |
78 | general-purpose and floating-point registers. */ | |
005328e3 | 79 | |
67457012 MK |
80 | if (strcmp (sect_name, ".reg") == 0 |
81 | && sect_size >= tdep->sizeof_gregset + I387_SIZEOF_FSAVE) | |
005328e3 | 82 | { |
67457012 MK |
83 | if (tdep->gregset == NULL) |
84 | { | |
85 | tdep->gregset = XMALLOC (struct regset); | |
86 | tdep->gregset->descr = tdep; | |
87 | tdep->gregset->supply_regset = i386obsd_aout_supply_regset; | |
88 | } | |
89 | return tdep->gregset; | |
005328e3 MK |
90 | } |
91 | ||
67457012 | 92 | return NULL; |
005328e3 MK |
93 | } |
94 | ||
005328e3 MK |
95 | \f |
96 | ||
97 | CORE_ADDR i386obsd_sigtramp_start = 0xbfbfdf20; | |
98 | CORE_ADDR i386obsd_sigtramp_end = 0xbfbfdff0; | |
99 | ||
100 | /* From <machine/signal.h>. */ | |
a3386186 MK |
101 | int i386obsd_sc_reg_offset[I386_NUM_GREGS] = |
102 | { | |
103 | 10 * 4, /* %eax */ | |
104 | 9 * 4, /* %ecx */ | |
105 | 8 * 4, /* %edx */ | |
106 | 7 * 4, /* %ebx */ | |
107 | 14 * 4, /* %esp */ | |
108 | 6 * 4, /* %ebp */ | |
109 | 5 * 4, /* %esi */ | |
110 | 4 * 4, /* %edi */ | |
111 | 11 * 4, /* %eip */ | |
112 | 13 * 4, /* %eflags */ | |
113 | 12 * 4, /* %cs */ | |
114 | 15 * 4, /* %ss */ | |
115 | 3 * 4, /* %ds */ | |
116 | 2 * 4, /* %es */ | |
117 | 1 * 4, /* %fs */ | |
118 | 0 * 4 /* %gs */ | |
119 | }; | |
005328e3 MK |
120 | |
121 | static void | |
122 | i386obsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
123 | { | |
124 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
125 | ||
126 | /* Obviously OpenBSD is BSD-based. */ | |
127 | i386bsd_init_abi (info, gdbarch); | |
128 | ||
67457012 MK |
129 | /* OpenBSD has a different `struct reg'. */ |
130 | tdep->gregset_reg_offset = i386obsd_r_reg_offset; | |
131 | tdep->gregset_num_regs = ARRAY_SIZE (i386obsd_r_reg_offset); | |
132 | tdep->sizeof_gregset = 16 * 4; | |
133 | ||
134 | /* OpenBSD has a single register set. */ | |
135 | set_gdbarch_regset_from_core_section | |
136 | (gdbarch, i386obsd_aout_regset_from_core_section); | |
137 | ||
005328e3 MK |
138 | /* OpenBSD uses -freg-struct-return by default. */ |
139 | tdep->struct_return = reg_struct_return; | |
140 | ||
141 | /* OpenBSD uses a different memory layout. */ | |
142 | tdep->sigtramp_start = i386obsd_sigtramp_start; | |
143 | tdep->sigtramp_end = i386obsd_sigtramp_end; | |
144 | ||
145 | /* OpenBSD has a `struct sigcontext' that's different from the | |
146 | origional 4.3 BSD. */ | |
a3386186 | 147 | tdep->sc_reg_offset = i386obsd_sc_reg_offset; |
67457012 | 148 | tdep->sc_num_regs = ARRAY_SIZE (i386obsd_sc_reg_offset); |
005328e3 | 149 | } |
67457012 MK |
150 | \f |
151 | ||
152 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
153 | void _initialize_i386obsd_tdep (void); | |
005328e3 MK |
154 | |
155 | void | |
156 | _initialize_i386obsd_tdep (void) | |
157 | { | |
005328e3 MK |
158 | /* FIXME: kettenis/20021020: Since OpenBSD/i386 binaries are |
159 | indistingushable from NetBSD/i386 a.out binaries, building a GDB | |
160 | that should support both these targets will probably not work as | |
161 | expected. */ | |
162 | #define GDB_OSABI_OPENBSD_AOUT GDB_OSABI_NETBSD_AOUT | |
163 | ||
05816f70 | 164 | gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_OPENBSD_AOUT, |
005328e3 MK |
165 | i386obsd_init_abi); |
166 | } |