Commit | Line | Data |
---|---|---|
005328e3 MK |
1 | /* Target-dependent code for OpenBSD/i386. |
2 | Copyright 1988, 1989, 1991, 1992, 1994, 1996, 2000, 2001, 2002 | |
3 | Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GDB. | |
6 | ||
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 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
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. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | #include "defs.h" | |
23 | #include "arch-utils.h" | |
24 | #include "gdbcore.h" | |
25 | #include "regcache.h" | |
26 | ||
27 | #include "i386-tdep.h" | |
28 | #include "i387-tdep.h" | |
29 | ||
30 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
31 | void _initialize_i386obsd_tdep (void); | |
32 | ||
33 | #define SIZEOF_STRUCT_REG (16 * 4) | |
34 | ||
35 | static void | |
36 | i386obsd_supply_reg (char *regs, int regno) | |
37 | { | |
38 | int i; | |
39 | ||
40 | for (i = 0; i <= 15; i++) | |
41 | if (regno == i || regno == -1) | |
42 | supply_register (i, regs + i * 4); | |
43 | } | |
44 | ||
45 | static void | |
46 | fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which, | |
47 | CORE_ADDR ignore) | |
48 | { | |
49 | char *regs, *fsave; | |
50 | ||
51 | /* We get everything from one section. */ | |
52 | if (which != 0) | |
53 | return; | |
54 | ||
55 | if (core_reg_size < (SIZEOF_STRUCT_REG + 108)) | |
56 | { | |
57 | warning ("Wrong size register set in core file."); | |
58 | return; | |
59 | } | |
60 | ||
61 | regs = core_reg_sect; | |
62 | fsave = core_reg_sect + SIZEOF_STRUCT_REG; | |
63 | ||
64 | /* Integer registers. */ | |
65 | i386obsd_supply_reg (regs, -1); | |
66 | ||
67 | /* Floating point registers. */ | |
68 | i387_supply_fsave (fsave); | |
69 | } | |
70 | ||
71 | static struct core_fns i386obsd_core_fns = | |
72 | { | |
73 | bfd_target_unknown_flavour, /* core_flavour */ | |
74 | default_check_format, /* check_format */ | |
75 | default_core_sniffer, /* core_sniffer */ | |
76 | fetch_core_registers, /* core_read_registers */ | |
77 | NULL /* next */ | |
78 | }; | |
79 | \f | |
80 | ||
81 | CORE_ADDR i386obsd_sigtramp_start = 0xbfbfdf20; | |
82 | CORE_ADDR i386obsd_sigtramp_end = 0xbfbfdff0; | |
83 | ||
84 | /* From <machine/signal.h>. */ | |
85 | int i386obsd_sc_pc_offset = 44; | |
86 | int i386obsd_sc_sp_offset = 56; | |
87 | ||
88 | static void | |
89 | i386obsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
90 | { | |
91 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
92 | ||
93 | /* Obviously OpenBSD is BSD-based. */ | |
94 | i386bsd_init_abi (info, gdbarch); | |
95 | ||
96 | /* OpenBSD uses -freg-struct-return by default. */ | |
97 | tdep->struct_return = reg_struct_return; | |
98 | ||
99 | /* OpenBSD uses a different memory layout. */ | |
100 | tdep->sigtramp_start = i386obsd_sigtramp_start; | |
101 | tdep->sigtramp_end = i386obsd_sigtramp_end; | |
102 | ||
103 | /* OpenBSD has a `struct sigcontext' that's different from the | |
104 | origional 4.3 BSD. */ | |
105 | tdep->sc_pc_offset = i386obsd_sc_pc_offset; | |
106 | tdep->sc_sp_offset = i386obsd_sc_sp_offset; | |
107 | } | |
108 | ||
109 | void | |
110 | _initialize_i386obsd_tdep (void) | |
111 | { | |
112 | add_core_fns (&i386obsd_core_fns); | |
113 | ||
114 | /* FIXME: kettenis/20021020: Since OpenBSD/i386 binaries are | |
115 | indistingushable from NetBSD/i386 a.out binaries, building a GDB | |
116 | that should support both these targets will probably not work as | |
117 | expected. */ | |
118 | #define GDB_OSABI_OPENBSD_AOUT GDB_OSABI_NETBSD_AOUT | |
119 | ||
120 | gdbarch_register_osabi (bfd_arch_i386, GDB_OSABI_OPENBSD_AOUT, | |
121 | i386obsd_init_abi); | |
122 | } |