1 /* Target-dependent code for FreeBSD/i386.
3 Copyright 2003, 2004 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 2 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, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
23 #include "arch-utils.h"
26 #include "i386-tdep.h"
27 #include "i387-tdep.h"
28 #include "solib-svr4.h"
30 /* FreeBSD 3.0-RELEASE or later. */
32 /* From <machine/reg.h>. */
33 static int i386fbsd_r_reg_offset
[] =
35 9 * 4, 8 * 4, 7 * 4, 6 * 4, /* %eax, %ecx, %edx, %ebx */
36 15 * 4, 4 * 4, /* %esp, %ebp */
37 3 * 4, 2 * 4, /* %esi, %edi */
38 12 * 4, 14 * 4, /* %eip, %eflags */
39 13 * 4, 16 * 4, /* %cs, %ss */
40 1 * 4, 0 * 4, -1, -1 /* %ds, %es, %fs, %gs */
43 /* Sigtramp routine location. */
44 CORE_ADDR i386fbsd_sigtramp_start_addr
= 0xbfbfdf20;
45 CORE_ADDR i386fbsd_sigtramp_end_addr
= 0xbfbfdff0;
47 /* From <machine/signal.h>. */
48 static int i386fbsd_sc_reg_offset
[] =
50 8 + 14 * 4, /* %eax */
51 8 + 13 * 4, /* %ecx */
52 8 + 12 * 4, /* %edx */
53 8 + 11 * 4, /* %ebx */
56 8 + 10 * 4, /* %esi */
59 8 + 4 * 4, /* %eflags */
69 i386fbsdaout_init_abi (struct gdbarch_info info
, struct gdbarch
*gdbarch
)
71 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
73 /* Obviously FreeBSD is BSD-based. */
74 i386bsd_init_abi (info
, gdbarch
);
76 /* FreeBSD has a different `struct reg', and reserves some space for
77 its FPU emulator in `struct fpreg'. */
78 tdep
->gregset_reg_offset
= i386fbsd_r_reg_offset
;
79 tdep
->gregset_num_regs
= ARRAY_SIZE (i386fbsd_r_reg_offset
);
80 tdep
->sizeof_gregset
= 18 * 4;
81 tdep
->sizeof_fpregset
= 176;
83 /* FreeBSD uses -freg-struct-return by default. */
84 tdep
->struct_return
= reg_struct_return
;
86 /* FreeBSD uses a different memory layout. */
87 tdep
->sigtramp_start
= i386fbsd_sigtramp_start_addr
;
88 tdep
->sigtramp_end
= i386fbsd_sigtramp_end_addr
;
90 /* FreeBSD has a more complete `struct sigcontext'. */
91 tdep
->sc_reg_offset
= i386fbsd_sc_reg_offset
;
92 tdep
->sc_num_regs
= ARRAY_SIZE (i386fbsd_sc_reg_offset
);
96 i386fbsd_init_abi (struct gdbarch_info info
, struct gdbarch
*gdbarch
)
98 /* It's almost identical to FreeBSD a.out. */
99 i386fbsdaout_init_abi (info
, gdbarch
);
101 /* Except that it uses ELF. */
102 i386_elf_init_abi (info
, gdbarch
);
104 /* FreeBSD ELF uses SVR4-style shared libraries. */
105 set_solib_svr4_fetch_link_map_offsets
106 (gdbarch
, svr4_ilp32_fetch_link_map_offsets
);
109 /* FreeBSD 4.0-RELEASE or later. */
111 /* From <machine/reg.h>. */
112 static int i386fbsd4_r_reg_offset
[] =
114 10 * 4, 9 * 4, 8 * 4, 7 * 4, /* %eax, %ecx, %edx, %ebx */
115 16 * 4, 5 * 4, /* %esp, %ebp */
116 4 * 4, 3 * 4, /* %esi, %edi */
117 13 * 4, 15 * 4, /* %eip, %eflags */
118 14 * 4, 17 * 4, /* %cs, %ss */
119 2 * 4, 1 * 4, 0 * 4, 18 * 4 /* %ds, %es, %fs, %gs */
122 /* From <machine/signal.h>. */
123 int i386fbsd4_sc_reg_offset
[] =
125 20 + 11 * 4, /* %eax */
126 20 + 10 * 4, /* %ecx */
127 20 + 9 * 4, /* %edx */
128 20 + 8 * 4, /* %ebx */
129 20 + 17 * 4, /* %esp */
130 20 + 6 * 4, /* %ebp */
131 20 + 5 * 4, /* %esi */
132 20 + 4 * 4, /* %edi */
133 20 + 14 * 4, /* %eip */
134 20 + 16 * 4, /* %eflags */
135 20 + 15 * 4, /* %cs */
136 20 + 18 * 4, /* %ss */
137 20 + 3 * 4, /* %ds */
138 20 + 2 * 4, /* %es */
139 20 + 1 * 4, /* %fs */
144 i386fbsd4_init_abi (struct gdbarch_info info
, struct gdbarch
*gdbarch
)
146 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
148 /* Inherit stuff from older releases. We assume that FreeBSD
149 4.0-RELEASE always uses ELF. */
150 i386fbsd_init_abi (info
, gdbarch
);
152 /* FreeBSD 4.0 introduced a new `struct reg'. */
153 tdep
->gregset_reg_offset
= i386fbsd4_r_reg_offset
;
154 tdep
->gregset_num_regs
= ARRAY_SIZE (i386fbsd4_r_reg_offset
);
155 tdep
->sizeof_gregset
= 19 * 4;
157 /* FreeBSD 4.0 introduced a new `struct sigcontext'. */
158 tdep
->sc_reg_offset
= i386fbsd4_sc_reg_offset
;
159 tdep
->sc_num_regs
= ARRAY_SIZE (i386fbsd4_sc_reg_offset
);
163 /* Provide a prototype to silence -Wmissing-prototypes. */
164 void _initialize_i386fbsd_tdep (void);
167 _initialize_i386fbsd_tdep (void)
169 gdbarch_register_osabi (bfd_arch_i386
, 0, GDB_OSABI_FREEBSD_AOUT
,
170 i386fbsdaout_init_abi
);
171 gdbarch_register_osabi (bfd_arch_i386
, 0, GDB_OSABI_FREEBSD_ELF
,