1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
/* Target-dependent code for Motorola 68000 BSD's.
Copyright 2004, 2005 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "arch-utils.h"
#include "osabi.h"
#include "regcache.h"
#include "regset.h"
#include "gdb_assert.h"
#include "gdb_string.h"
#include "m68k-tdep.h"
#include "solib-svr4.h"
/* Core file support. */
/* Sizeof `struct reg' in <machine/reg.h>. */
#define M68KBSD_SIZEOF_GREGS (18 * 4)
/* Sizeof `struct fpreg' in <machine/reg.h. */
#define M68KBSD_SIZEOF_FPREGS (((8 * 3) + 3) * 4)
int
m68kbsd_fpreg_offset (int regnum)
{
if (regnum >= M68K_FPC_REGNUM)
return 8 * 12 + (regnum - M68K_FPC_REGNUM) * 4;
return (regnum - M68K_FP0_REGNUM) * 12;
}
/* Supply register REGNUM from the buffer specified by FPREGS and LEN
in the floating-point register set REGSET to register cache
REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */
static void
m68kbsd_supply_fpregset (const struct regset *regset,
struct regcache *regcache,
int regnum, const void *fpregs, size_t len)
{
const gdb_byte *regs = fpregs;
int i;
gdb_assert (len >= M68KBSD_SIZEOF_FPREGS);
for (i = M68K_FP0_REGNUM; i <= M68K_PC_REGNUM; i++)
{
if (regnum == i || regnum == -1)
regcache_raw_supply (regcache, i, regs + m68kbsd_fpreg_offset (i));
}
}
/* Supply register REGNUM from the buffer specified by GREGS and LEN
in the general-purpose register set REGSET to register cache
REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */
static void
m68kbsd_supply_gregset (const struct regset *regset,
struct regcache *regcache,
int regnum, const void *gregs, size_t len)
{
const gdb_byte *regs = gregs;
int i;
gdb_assert (len >= M68KBSD_SIZEOF_GREGS);
for (i = M68K_D0_REGNUM; i <= M68K_PC_REGNUM; i++)
{
if (regnum == i || regnum == -1)
regcache_raw_supply (regcache, i, regs + i * 4);
}
if (len >= M68KBSD_SIZEOF_GREGS + M68KBSD_SIZEOF_FPREGS)
{
regs += M68KBSD_SIZEOF_GREGS;
len -= M68KBSD_SIZEOF_GREGS;
m68kbsd_supply_fpregset (regset, regcache, regnum, regs, len);
}
}
/* Motorola 68000 register sets. */
static struct regset m68kbsd_gregset =
{
NULL,
m68kbsd_supply_gregset
};
static struct regset m68kbsd_fpregset =
{
NULL,
m68kbsd_supply_fpregset
};
/* Return the appropriate register set for the core section identified
by SECT_NAME and SECT_SIZE. */
static const struct regset *
m68kbsd_regset_from_core_section (struct gdbarch *gdbarch,
const char *sect_name, size_t sect_size)
{
if (strcmp (sect_name, ".reg") == 0 && sect_size >= M68KBSD_SIZEOF_GREGS)
return &m68kbsd_gregset;
if (strcmp (sect_name, ".reg2") == 0 && sect_size >= M68KBSD_SIZEOF_FPREGS)
return &m68kbsd_fpregset;
return NULL;
}
static void
m68kbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
tdep->jb_pc = 5;
tdep->jb_elt_size = 4;
set_gdbarch_regset_from_core_section
(gdbarch, m68kbsd_regset_from_core_section);
}
/* OpenBSD and NetBSD a.out. */
static void
m68kbsd_aout_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
m68kbsd_init_abi (info, gdbarch);
tdep->struct_return = reg_struct_return;
}
/* NetBSD ELF. */
static void
m68kbsd_elf_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
m68kbsd_init_abi (info, gdbarch);
/* NetBSD ELF uses the SVR4 ABI. */
m68k_svr4_init_abi (info, gdbarch);
tdep->struct_return = pcc_struct_return;
/* NetBSD ELF uses SVR4-style shared libraries. */
set_solib_svr4_fetch_link_map_offsets
(gdbarch, svr4_ilp32_fetch_link_map_offsets);
}
static enum gdb_osabi
m68kbsd_aout_osabi_sniffer (bfd *abfd)
{
if (strcmp (bfd_get_target (abfd), "a.out-m68k-netbsd") == 0
|| strcmp (bfd_get_target (abfd), "a.out-m68k4k-netbsd") == 0)
return GDB_OSABI_NETBSD_AOUT;
return GDB_OSABI_UNKNOWN;
}
static enum gdb_osabi
m68kbsd_core_osabi_sniffer (bfd *abfd)
{
if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0)
return GDB_OSABI_NETBSD_AOUT;
return GDB_OSABI_UNKNOWN;
}
/* Provide a prototype to silence -Wmissing-prototypes. */
void _initialize_m68kbsd_tdep (void);
void
_initialize_m68kbsd_tdep (void)
{
gdbarch_register_osabi_sniffer (bfd_arch_m68k, bfd_target_aout_flavour,
m68kbsd_aout_osabi_sniffer);
/* BFD doesn't set a flavour for NetBSD style a.out core files. */
gdbarch_register_osabi_sniffer (bfd_arch_m68k, bfd_target_unknown_flavour,
m68kbsd_core_osabi_sniffer);
gdbarch_register_osabi (bfd_arch_m68k, 0, GDB_OSABI_NETBSD_AOUT,
m68kbsd_aout_init_abi);
gdbarch_register_osabi (bfd_arch_m68k, 0, GDB_OSABI_NETBSD_ELF,
m68kbsd_elf_init_abi);
}
|
