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"
29 /* FreeBSD 3.0-RELEASE or later. */
31 /* From <machine/reg.h>. */
32 static int i386fbsd_r_reg_offset[] =
34 9 * 4, 8 * 4, 7 * 4, 6 * 4, /* %eax, %ecx, %edx, %ebx */
35 15 * 4, 4 * 4, /* %esp, %ebp */
36 3 * 4, 2 * 4, /* %esi, %edi */
37 12 * 4, 14 * 4, /* %eip, %eflags */
38 13 * 4, 16 * 4, /* %cs, %ss */
39 1 * 4, 0 * 4, -1, -1 /* %ds, %es, %fs, %gs */
42 /* Sigtramp routine location. */
43 CORE_ADDR i386fbsd_sigtramp_start_addr = 0xbfbfdf20;
44 CORE_ADDR i386fbsd_sigtramp_end_addr = 0xbfbfdff0;
46 /* From <machine/signal.h>. */
47 static int i386fbsd_sc_reg_offset[] =
49 8 + 14 * 4, /* %eax */
50 8 + 13 * 4, /* %ecx */
51 8 + 12 * 4, /* %edx */
52 8 + 11 * 4, /* %ebx */
55 8 + 10 * 4, /* %esi */
58 8 + 4 * 4, /* %eflags */
68 i386fbsdaout_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
70 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
72 /* Obviously FreeBSD is BSD-based. */
73 i386bsd_init_abi (info, gdbarch);
75 /* FreeBSD has a different `struct reg', and reserves some space for
76 its FPU emulator in `struct fpreg'. */
77 tdep->gregset_reg_offset = i386fbsd_r_reg_offset;
78 tdep->gregset_num_regs = ARRAY_SIZE (i386fbsd_r_reg_offset);
79 tdep->sizeof_gregset = 18 * 4;
80 tdep->sizeof_fpregset = 176;
82 /* FreeBSD uses -freg-struct-return by default. */
83 tdep->struct_return = reg_struct_return;
85 /* FreeBSD uses a different memory layout. */
86 tdep->sigtramp_start = i386fbsd_sigtramp_start_addr;
87 tdep->sigtramp_end = i386fbsd_sigtramp_end_addr;
89 /* FreeBSD has a more complete `struct sigcontext'. */
90 tdep->sc_reg_offset = i386fbsd_sc_reg_offset;
91 tdep->sc_num_regs = ARRAY_SIZE (i386fbsd_sc_reg_offset);
95 i386fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
97 /* It's almost identical to FreeBSD a.out. */
98 i386fbsdaout_init_abi (info, gdbarch);
100 /* Except that it uses ELF. */
101 i386_elf_init_abi (info, gdbarch);
103 /* FreeBSD ELF uses SVR4-style shared libraries. */
104 set_gdbarch_in_solib_call_trampoline (gdbarch,
105 generic_in_solib_call_trampoline);
108 /* FreeBSD 4.0-RELEASE or later. */
110 /* From <machine/reg.h>. */
111 static int i386fbsd4_r_reg_offset[] =
113 10 * 4, 9 * 4, 8 * 4, 7 * 4, /* %eax, %ecx, %edx, %ebx */
114 16 * 4, 5 * 4, /* %esp, %ebp */
115 4 * 4, 3 * 4, /* %esi, %edi */
116 13 * 4, 15 * 4, /* %eip, %eflags */
117 14 * 4, 17 * 4, /* %cs, %ss */
118 2 * 4, 1 * 4, 0 * 4, 18 * 4 /* %ds, %es, %fs, %gs */
121 /* From <machine/signal.h>. */
122 int i386fbsd4_sc_reg_offset[] =
124 20 + 11 * 4, /* %eax */
125 20 + 10 * 4, /* %ecx */
126 20 + 9 * 4, /* %edx */
127 20 + 8 * 4, /* %ebx */
128 20 + 17 * 4, /* %esp */
129 20 + 6 * 4, /* %ebp */
130 20 + 5 * 4, /* %esi */
131 20 + 4 * 4, /* %edi */
132 20 + 14 * 4, /* %eip */
133 20 + 16 * 4, /* %eflags */
134 20 + 15 * 4, /* %cs */
135 20 + 18 * 4, /* %ss */
136 20 + 3 * 4, /* %ds */
137 20 + 2 * 4, /* %es */
138 20 + 1 * 4, /* %fs */
143 i386fbsd4_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
145 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
147 /* Inherit stuff from older releases. We assume that FreeBSD
148 4.0-RELEASE always uses ELF. */
149 i386fbsd_init_abi (info, gdbarch);
151 /* FreeBSD 4.0 introduced a new `struct reg'. */
152 tdep->gregset_reg_offset = i386fbsd4_r_reg_offset;
153 tdep->gregset_num_regs = ARRAY_SIZE (i386fbsd4_r_reg_offset);
154 tdep->sizeof_gregset = 19 * 4;
156 /* FreeBSD 4.0 introduced a new `struct sigcontext'. */
157 tdep->sc_reg_offset = i386fbsd4_sc_reg_offset;
158 tdep->sc_num_regs = ARRAY_SIZE (i386fbsd4_sc_reg_offset);
162 /* Provide a prototype to silence -Wmissing-prototypes. */
163 void _initialize_i386fbsd_tdep (void);
166 _initialize_i386fbsd_tdep (void)
168 gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_FREEBSD_AOUT,
169 i386fbsdaout_init_abi);
170 gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_FREEBSD_ELF,