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
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
|
/* BFD library support routines for architectures.
Copyright (C) 1990-2016 Free Software Foundation, Inc.
Hacked by Steve Chamberlain of Cygnus Support.
This file is part of BFD, the Binary File Descriptor library.
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 3 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., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
#include "sysdep.h"
#include "bfd.h"
#include "libbfd.h"
#include "opcode/m68k.h"
static const bfd_arch_info_type *
bfd_m68k_compatible (const bfd_arch_info_type *a,
const bfd_arch_info_type *b);
#define N(name, print,d,next) \
{ 32, 32, 8, bfd_arch_m68k, name, "m68k",print,2,d,bfd_m68k_compatible, \
bfd_default_scan, bfd_arch_default_fill, next, }
static const bfd_arch_info_type arch_info_struct[] =
{
N(bfd_mach_m68000, "m68k:68000", FALSE, &arch_info_struct[1]),
N(bfd_mach_m68008, "m68k:68008", FALSE, &arch_info_struct[2]),
N(bfd_mach_m68010, "m68k:68010", FALSE, &arch_info_struct[3]),
N(bfd_mach_m68020, "m68k:68020", FALSE, &arch_info_struct[4]),
N(bfd_mach_m68030, "m68k:68030", FALSE, &arch_info_struct[5]),
N(bfd_mach_m68040, "m68k:68040", FALSE, &arch_info_struct[6]),
N(bfd_mach_m68060, "m68k:68060", FALSE, &arch_info_struct[7]),
N(bfd_mach_cpu32, "m68k:cpu32", FALSE, &arch_info_struct[8]),
N(bfd_mach_fido, "m68k:fido", FALSE, &arch_info_struct[9]),
/* Various combinations of CF architecture features */
N(bfd_mach_mcf_isa_a_nodiv, "m68k:isa-a:nodiv",
FALSE, &arch_info_struct[10]),
N(bfd_mach_mcf_isa_a, "m68k:isa-a",
FALSE, &arch_info_struct[11]),
N(bfd_mach_mcf_isa_a_mac, "m68k:isa-a:mac",
FALSE, &arch_info_struct[12]),
N(bfd_mach_mcf_isa_a_emac, "m68k:isa-a:emac",
FALSE, &arch_info_struct[13]),
N(bfd_mach_mcf_isa_aplus, "m68k:isa-aplus",
FALSE, &arch_info_struct[14]),
N(bfd_mach_mcf_isa_aplus_mac, "m68k:isa-aplus:mac",
FALSE, &arch_info_struct[15]),
N(bfd_mach_mcf_isa_aplus_emac, "m68k:isa-aplus:emac",
FALSE, &arch_info_struct[16]),
N(bfd_mach_mcf_isa_b_nousp, "m68k:isa-b:nousp",
FALSE, &arch_info_struct[17]),
N(bfd_mach_mcf_isa_b_nousp_mac, "m68k:isa-b:nousp:mac",
FALSE, &arch_info_struct[18]),
N(bfd_mach_mcf_isa_b_nousp_emac, "m68k:isa-b:nousp:emac",
FALSE, &arch_info_struct[19]),
N(bfd_mach_mcf_isa_b, "m68k:isa-b",
FALSE, &arch_info_struct[20]),
N(bfd_mach_mcf_isa_b_mac, "m68k:isa-b:mac",
FALSE, &arch_info_struct[21]),
N(bfd_mach_mcf_isa_b_emac, "m68k:isa-b:emac",
FALSE, &arch_info_struct[22]),
N(bfd_mach_mcf_isa_b_float, "m68k:isa-b:float",
FALSE, &arch_info_struct[23]),
N(bfd_mach_mcf_isa_b_float_mac, "m68k:isa-b:float:mac",
FALSE, &arch_info_struct[24]),
N(bfd_mach_mcf_isa_b_float_emac, "m68k:isa-b:float:emac",
FALSE, &arch_info_struct[25]),
N(bfd_mach_mcf_isa_c, "m68k:isa-c",
FALSE, &arch_info_struct[26]),
N(bfd_mach_mcf_isa_c_mac, "m68k:isa-c:mac",
FALSE, &arch_info_struct[27]),
N(bfd_mach_mcf_isa_c_emac, "m68k:isa-c:emac",
FALSE, &arch_info_struct[28]),
N(bfd_mach_mcf_isa_c_nodiv, "m68k:isa-c:nodiv",
FALSE, &arch_info_struct[29]),
N(bfd_mach_mcf_isa_c_nodiv_mac, "m68k:isa-c:nodiv:mac",
FALSE, &arch_info_struct[30]),
N(bfd_mach_mcf_isa_c_nodiv_emac, "m68k:isa-c:nodiv:emac",
FALSE, &arch_info_struct[31]),
/* Legacy names for CF architectures */
N(bfd_mach_mcf_isa_a_nodiv, "m68k:5200", FALSE, &arch_info_struct[32]),
N(bfd_mach_mcf_isa_a_mac,"m68k:5206e", FALSE, &arch_info_struct[33]),
N(bfd_mach_mcf_isa_a_mac, "m68k:5307", FALSE, &arch_info_struct[34]),
N(bfd_mach_mcf_isa_b_nousp_mac, "m68k:5407", FALSE, &arch_info_struct[35]),
N(bfd_mach_mcf_isa_aplus_emac, "m68k:528x", FALSE, &arch_info_struct[36]),
N(bfd_mach_mcf_isa_aplus_emac, "m68k:521x", FALSE, &arch_info_struct[37]),
N(bfd_mach_mcf_isa_a_emac, "m68k:5249", FALSE, &arch_info_struct[38]),
N(bfd_mach_mcf_isa_b_float_emac, "m68k:547x",
FALSE, &arch_info_struct[39]),
N(bfd_mach_mcf_isa_b_float_emac, "m68k:548x",
FALSE, &arch_info_struct[40]),
N(bfd_mach_mcf_isa_b_float_emac, "m68k:cfv4e", FALSE, 0),
};
const bfd_arch_info_type bfd_m68k_arch =
N(0, "m68k", TRUE, &arch_info_struct[0]);
/* Table indexed by bfd_mach_arch number indicating which
architectural features are supported. */
static const unsigned m68k_arch_features[] =
{
0,
m68000|m68881|m68851,
m68000|m68881|m68851,
m68010|m68881|m68851,
m68020|m68881|m68851,
m68030|m68881|m68851,
m68040|m68881|m68851,
m68060|m68881|m68851,
cpu32|m68881,
fido_a|m68881,
mcfisa_a,
mcfisa_a|mcfhwdiv,
mcfisa_a|mcfhwdiv|mcfmac,
mcfisa_a|mcfhwdiv|mcfemac,
mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp,
mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp|mcfmac,
mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp|mcfemac,
mcfisa_a|mcfhwdiv|mcfisa_b,
mcfisa_a|mcfhwdiv|mcfisa_b|mcfmac,
mcfisa_a|mcfhwdiv|mcfisa_b|mcfemac,
mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp,
mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|mcfmac,
mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|mcfemac,
mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|cfloat,
mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|cfloat|mcfmac,
mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|cfloat|mcfemac,
mcfisa_a|mcfhwdiv|mcfisa_c|mcfusp,
mcfisa_a|mcfhwdiv|mcfisa_c|mcfusp|mcfmac,
mcfisa_a|mcfhwdiv|mcfisa_c|mcfusp|mcfemac,
mcfisa_a|mcfisa_c|mcfusp,
mcfisa_a|mcfisa_c|mcfusp|mcfmac,
mcfisa_a|mcfisa_c|mcfusp|mcfemac,
};
/* Return the count of bits set in MASK */
static unsigned
bit_count (unsigned mask)
{
unsigned ix;
for (ix = 0; mask; ix++)
/* Clear the LSB set */
mask ^= mask & -mask;
return ix;
}
/* Return the architectural features supported by MACH */
unsigned
bfd_m68k_mach_to_features (int mach)
{
if ((unsigned)mach
>= sizeof (m68k_arch_features) / sizeof (m68k_arch_features[0]))
mach = 0;
return m68k_arch_features[mach];
}
/* Return the bfd machine that most closely represents the
architectural features. We find the machine with the smallest
number of additional features. If there is no such machine, we
find the one with the smallest number of missing features. */
int bfd_m68k_features_to_mach (unsigned features)
{
int superset = 0, subset = 0;
unsigned extra = 99, missing = 99;
unsigned ix;
for (ix = 0;
ix != sizeof (m68k_arch_features) / sizeof (m68k_arch_features[0]);
ix++)
{
unsigned this_extra, this_missing;
if (m68k_arch_features[ix] == features)
return ix;
this_extra = bit_count (m68k_arch_features[ix] & ~features);
if (this_extra < extra)
{
extra = this_extra;
superset = ix;
}
this_missing = bit_count (features & ~m68k_arch_features[ix]);
if (this_missing < missing)
{
missing = this_missing;
superset = ix;
}
}
return superset ? superset : subset;
}
static const bfd_arch_info_type *
bfd_m68k_compatible (const bfd_arch_info_type *a,
const bfd_arch_info_type *b)
{
if (a->arch != b->arch)
return NULL;
if (a->bits_per_word != b->bits_per_word)
return NULL;
if (!a->mach)
return b;
if (!b->mach)
return a;
if (a->mach <= bfd_mach_m68060 && b->mach <= bfd_mach_m68060)
/* Merge m68k machine. */
return a->mach > b->mach ? a : b;
else if (a->mach >= bfd_mach_cpu32 && b->mach >= bfd_mach_cpu32)
{
/* Merge the machine features. */
unsigned features = (bfd_m68k_mach_to_features (a->mach)
| bfd_m68k_mach_to_features (b->mach));
/* CPU32 and Coldfire are incompatible. */
if ((~features & (cpu32 | mcfisa_a)) == 0)
return NULL;
/* Fido and Coldfire are incompatible. */
if ((~features & (fido_a | mcfisa_a)) == 0)
return NULL;
/* ISA A+ and ISA B are incompatible. */
if ((~features & (mcfisa_aa | mcfisa_b)) == 0)
return NULL;
/* ISA B and ISA C are incompatible. */
if ((~features & (mcfisa_b | mcfisa_c)) == 0)
return NULL;
/* MAC and EMAC code cannot be merged. */
if ((~features & (mcfmac | mcfemac)) == 0)
return NULL;
/* CPU32 is compatible with Fido except that Fido does not
support tbl instructions. Warn when the user wants to mix
the two. */
if ((a->mach == bfd_mach_cpu32 && b->mach == bfd_mach_fido)
|| (a->mach == bfd_mach_fido && b->mach == bfd_mach_cpu32))
{
static int cpu32_fido_mix_warning;
if (!cpu32_fido_mix_warning)
{
cpu32_fido_mix_warning = 1;
_bfd_error_handler ("warning: linking CPU32 objects with fido objects");
}
return bfd_lookup_arch (a->arch,
bfd_m68k_features_to_mach (fido_a | m68881));
}
return bfd_lookup_arch (a->arch, bfd_m68k_features_to_mach (features));
}
else
/* They are incompatible. */
return NULL;
}
|
