Commit | Line | Data |
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252b5132 | 1 | /* BFD support for the Intel 386 architecture. |
aa820537 | 2 | Copyright 1992, 1994, 1995, 1996, 1998, 2000, 2001, 2002, 2004, 2005, |
1098fd41 | 3 | 2007, 2009, 2010, 2011, 2013 |
7898deda | 4 | Free Software Foundation, Inc. |
252b5132 | 5 | |
cd123cb7 | 6 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 7 | |
cd123cb7 NC |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 3 of the License, or | |
11 | (at your option) any later version. | |
252b5132 | 12 | |
cd123cb7 NC |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
252b5132 | 17 | |
cd123cb7 NC |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
21 | MA 02110-1301, USA. */ | |
252b5132 | 22 | |
252b5132 | 23 | #include "sysdep.h" |
3db64b00 | 24 | #include "bfd.h" |
252b5132 | 25 | #include "libbfd.h" |
b7761f11 L |
26 | #include "libiberty.h" |
27 | ||
923f257f L |
28 | extern void * bfd_arch_i386_short_nop_fill (bfd_size_type, bfd_boolean, |
29 | bfd_boolean); | |
252b5132 | 30 | |
889a4d3e L |
31 | static const bfd_arch_info_type * |
32 | bfd_i386_compatible (const bfd_arch_info_type *a, | |
33 | const bfd_arch_info_type *b) | |
34 | { | |
35 | const bfd_arch_info_type *compat = bfd_default_compatible (a, b); | |
36 | ||
37 | /* Don't allow mixing x64_32 with x86_64. */ | |
d7921315 L |
38 | if (compat |
39 | && (a->mach & bfd_mach_x64_32) != (b->mach & bfd_mach_x64_32)) | |
889a4d3e L |
40 | compat = NULL; |
41 | ||
42 | return compat; | |
43 | } | |
44 | ||
923f257f L |
45 | /* Fill the buffer with zero or nop instruction if CODE is TRUE. Use |
46 | multi byte nop instructions if LONG_NOP is TRUE. */ | |
b7761f11 | 47 | |
923f257f L |
48 | static void * |
49 | bfd_arch_i386_fill (bfd_size_type count, bfd_boolean code, | |
50 | bfd_boolean long_nop) | |
b7761f11 L |
51 | { |
52 | /* nop */ | |
68ffbac6 | 53 | static const char nop_1[] = { 0x90 }; |
923f257f | 54 | /* xchg %ax,%ax */ |
b7761f11 L |
55 | static const char nop_2[] = { 0x66, 0x90 }; |
56 | /* nopl (%[re]ax) */ | |
57 | static const char nop_3[] = { 0x0f, 0x1f, 0x00 }; | |
58 | /* nopl 0(%[re]ax) */ | |
59 | static const char nop_4[] = { 0x0f, 0x1f, 0x40, 0x00 }; | |
60 | /* nopl 0(%[re]ax,%[re]ax,1) */ | |
61 | static const char nop_5[] = { 0x0f, 0x1f, 0x44, 0x00, 0x00 }; | |
62 | /* nopw 0(%[re]ax,%[re]ax,1) */ | |
63 | static const char nop_6[] = { 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 }; | |
64 | /* nopl 0L(%[re]ax) */ | |
65 | static const char nop_7[] = { 0x0f, 0x1f, 0x80, 0x00, 0x00, 0x00, 0x00 }; | |
66 | /* nopl 0L(%[re]ax,%[re]ax,1) */ | |
67 | static const char nop_8[] = | |
68 | { 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00}; | |
69 | /* nopw 0L(%[re]ax,%[re]ax,1) */ | |
70 | static const char nop_9[] = | |
71 | { 0x66, 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00 }; | |
72 | /* nopw %cs:0L(%[re]ax,%[re]ax,1) */ | |
73 | static const char nop_10[] = | |
74 | { 0x66, 0x2e, 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00 }; | |
75 | static const char *const nops[] = | |
76 | { nop_1, nop_2, nop_3, nop_4, nop_5, | |
77 | nop_6, nop_7, nop_8, nop_9, nop_10 }; | |
923f257f | 78 | bfd_size_type nop_size = long_nop ? ARRAY_SIZE (nops) : 2; |
b7761f11 L |
79 | |
80 | void *fill = bfd_malloc (count); | |
81 | if (fill == NULL) | |
82 | return fill; | |
83 | ||
84 | if (code) | |
85 | { | |
86 | bfd_byte *p = fill; | |
923f257f | 87 | while (count >= nop_size) |
b7761f11 | 88 | { |
923f257f L |
89 | memcpy (p, nops[nop_size - 1], nop_size); |
90 | p += nop_size; | |
91 | count -= nop_size; | |
b7761f11 L |
92 | } |
93 | if (count != 0) | |
94 | memcpy (p, nops[count - 1], count); | |
95 | } | |
96 | else | |
97 | memset (fill, 0, count); | |
98 | ||
99 | return fill; | |
100 | } | |
101 | ||
923f257f L |
102 | /* Fill the buffer with zero or short nop instruction if CODE is TRUE. */ |
103 | ||
104 | void * | |
105 | bfd_arch_i386_short_nop_fill (bfd_size_type count, | |
106 | bfd_boolean is_bigendian ATTRIBUTE_UNUSED, | |
107 | bfd_boolean code) | |
108 | { | |
109 | return bfd_arch_i386_fill (count, code, FALSE); | |
110 | } | |
111 | ||
112 | /* Fill the buffer with zero or long nop instruction if CODE is TRUE. */ | |
113 | ||
114 | static void * | |
115 | bfd_arch_i386_long_nop_fill (bfd_size_type count, | |
116 | bfd_boolean is_bigendian ATTRIBUTE_UNUSED, | |
117 | bfd_boolean code) | |
118 | { | |
119 | return bfd_arch_i386_fill (count, code, TRUE); | |
120 | } | |
121 | ||
1098fd41 RM |
122 | /* Fill the buffer with zero, or one-byte nop instructions if CODE is TRUE. */ |
123 | ||
124 | static void * | |
125 | bfd_arch_i386_onebyte_nop_fill (bfd_size_type count, | |
126 | bfd_boolean is_bigendian ATTRIBUTE_UNUSED, | |
127 | bfd_boolean code) | |
128 | { | |
129 | void *fill = bfd_malloc (count); | |
130 | if (fill != NULL) | |
131 | memset (fill, code ? 0x90 : 0, count); | |
132 | return fill; | |
133 | } | |
134 | ||
135 | ||
136 | static const bfd_arch_info_type bfd_x64_32_nacl_arch = | |
137 | { | |
138 | 64, /* 64 bits in a word */ | |
139 | 64, /* 64 bits in an address */ | |
140 | 8, /* 8 bits in a byte */ | |
141 | bfd_arch_i386, | |
142 | bfd_mach_x64_32_nacl, | |
143 | "i386", | |
144 | "i386:x64-32:nacl", | |
145 | 3, | |
146 | FALSE, | |
147 | bfd_i386_compatible, | |
148 | bfd_default_scan, | |
149 | bfd_arch_i386_onebyte_nop_fill, | |
150 | NULL | |
151 | }; | |
152 | ||
153 | static const bfd_arch_info_type bfd_x86_64_nacl_arch = | |
154 | { | |
155 | 64, /* 64 bits in a word */ | |
156 | 64, /* 64 bits in an address */ | |
157 | 8, /* 8 bits in a byte */ | |
158 | bfd_arch_i386, | |
159 | bfd_mach_x86_64_nacl, | |
160 | "i386", | |
161 | "i386:x86-64:nacl", | |
162 | 3, | |
163 | FALSE, | |
164 | bfd_i386_compatible, | |
165 | bfd_default_scan, | |
166 | bfd_arch_i386_onebyte_nop_fill, | |
167 | &bfd_x64_32_nacl_arch | |
168 | }; | |
169 | ||
170 | const bfd_arch_info_type bfd_i386_nacl_arch = | |
171 | { | |
172 | 32, /* 32 bits in a word */ | |
173 | 32, /* 32 bits in an address */ | |
174 | 8, /* 8 bits in a byte */ | |
175 | bfd_arch_i386, | |
176 | bfd_mach_i386_i386_nacl, | |
177 | "i386", | |
178 | "i386:nacl", | |
179 | 3, | |
180 | TRUE, | |
181 | bfd_i386_compatible, | |
182 | bfd_default_scan, | |
183 | bfd_arch_i386_onebyte_nop_fill, | |
184 | &bfd_x86_64_nacl_arch | |
185 | }; | |
186 | ||
351f65ca L |
187 | static const bfd_arch_info_type bfd_x64_32_arch_intel_syntax = |
188 | { | |
189 | 64, /* 64 bits in a word */ | |
d7921315 | 190 | 64, /* 64 bits in an address */ |
351f65ca L |
191 | 8, /* 8 bits in a byte */ |
192 | bfd_arch_i386, | |
193 | bfd_mach_x64_32_intel_syntax, | |
194 | "i386:intel", | |
195 | "i386:x64-32:intel", | |
196 | 3, | |
197 | FALSE, | |
889a4d3e | 198 | bfd_i386_compatible, |
351f65ca | 199 | bfd_default_scan, |
923f257f | 200 | bfd_arch_i386_long_nop_fill, |
1098fd41 | 201 | &bfd_i386_nacl_arch |
351f65ca L |
202 | }; |
203 | ||
34274ccc | 204 | static const bfd_arch_info_type bfd_x86_64_arch_intel_syntax = |
8d88c4ca NC |
205 | { |
206 | 64, /* 64 bits in a word */ | |
207 | 64, /* 64 bits in an address */ | |
208 | 8, /* 8 bits in a byte */ | |
209 | bfd_arch_i386, | |
210 | bfd_mach_x86_64_intel_syntax, | |
beb43bb9 JH |
211 | "i386:intel", |
212 | "i386:x86-64:intel", | |
8d88c4ca | 213 | 3, |
1abc8597 | 214 | FALSE, |
889a4d3e | 215 | bfd_i386_compatible, |
1abc8597 | 216 | bfd_default_scan, |
923f257f | 217 | bfd_arch_i386_long_nop_fill, |
351f65ca | 218 | &bfd_x64_32_arch_intel_syntax, |
1abc8597 AM |
219 | }; |
220 | ||
34274ccc | 221 | static const bfd_arch_info_type bfd_i386_arch_intel_syntax = |
1abc8597 AM |
222 | { |
223 | 32, /* 32 bits in a word */ | |
224 | 32, /* 32 bits in an address */ | |
225 | 8, /* 8 bits in a byte */ | |
226 | bfd_arch_i386, | |
227 | bfd_mach_i386_i386_intel_syntax, | |
228 | "i386:intel", | |
229 | "i386:intel", | |
230 | 3, | |
b34976b6 | 231 | TRUE, |
889a4d3e | 232 | bfd_i386_compatible, |
1abc8597 | 233 | bfd_default_scan, |
923f257f | 234 | bfd_arch_i386_short_nop_fill, |
1abc8597 | 235 | &bfd_x86_64_arch_intel_syntax |
8d88c4ca | 236 | }; |
1abc8597 | 237 | |
34274ccc | 238 | static const bfd_arch_info_type i8086_arch = |
252b5132 RH |
239 | { |
240 | 32, /* 32 bits in a word */ | |
241 | 32, /* 32 bits in an address (well, not really) */ | |
242 | 8, /* 8 bits in a byte */ | |
243 | bfd_arch_i386, | |
244 | bfd_mach_i386_i8086, | |
245 | "i8086", | |
246 | "i8086", | |
247 | 3, | |
b34976b6 | 248 | FALSE, |
889a4d3e | 249 | bfd_i386_compatible, |
1abc8597 | 250 | bfd_default_scan, |
923f257f | 251 | bfd_arch_i386_short_nop_fill, |
1abc8597 | 252 | &bfd_i386_arch_intel_syntax |
8d88c4ca NC |
253 | }; |
254 | ||
351f65ca L |
255 | static const bfd_arch_info_type bfd_x64_32_arch = |
256 | { | |
257 | 64, /* 64 bits in a word */ | |
d7921315 | 258 | 64, /* 64 bits in an address */ |
351f65ca L |
259 | 8, /* 8 bits in a byte */ |
260 | bfd_arch_i386, | |
261 | bfd_mach_x64_32, | |
262 | "i386", | |
263 | "i386:x64-32", | |
264 | 3, | |
265 | FALSE, | |
889a4d3e | 266 | bfd_i386_compatible, |
351f65ca | 267 | bfd_default_scan, |
923f257f | 268 | bfd_arch_i386_long_nop_fill, |
351f65ca L |
269 | &i8086_arch |
270 | }; | |
271 | ||
34274ccc | 272 | static const bfd_arch_info_type bfd_x86_64_arch = |
8d88c4ca | 273 | { |
b1995b01 L |
274 | 64, /* 64 bits in a word */ |
275 | 64, /* 64 bits in an address */ | |
8d88c4ca NC |
276 | 8, /* 8 bits in a byte */ |
277 | bfd_arch_i386, | |
278 | bfd_mach_x86_64, | |
beb43bb9 JH |
279 | "i386", |
280 | "i386:x86-64", | |
8d88c4ca | 281 | 3, |
1abc8597 | 282 | FALSE, |
889a4d3e | 283 | bfd_i386_compatible, |
1abc8597 | 284 | bfd_default_scan, |
923f257f | 285 | bfd_arch_i386_long_nop_fill, |
351f65ca | 286 | &bfd_x64_32_arch |
252b5132 RH |
287 | }; |
288 | ||
289 | const bfd_arch_info_type bfd_i386_arch = | |
290 | { | |
291 | 32, /* 32 bits in a word */ | |
292 | 32, /* 32 bits in an address */ | |
293 | 8, /* 8 bits in a byte */ | |
294 | bfd_arch_i386, | |
295 | bfd_mach_i386_i386, | |
296 | "i386", | |
297 | "i386", | |
298 | 3, | |
b34976b6 | 299 | TRUE, |
889a4d3e | 300 | bfd_i386_compatible, |
1abc8597 | 301 | bfd_default_scan, |
923f257f | 302 | bfd_arch_i386_short_nop_fill, |
3fde5a36 | 303 | &bfd_x86_64_arch |
252b5132 | 304 | }; |