1 /* BFD support for the ARM processor
2 Copyright (C) 1994-2019 Free Software Foundation, Inc.
3 Contributed by Richard Earnshaw (rwe@pegasus.esprit.ec.org)
5 This file is part of BFD, the Binary File Descriptor library.
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 3 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., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
25 #include "libiberty.h"
27 /* This routine is provided two arch_infos and works out which ARM
28 machine which would be compatible with both and returns a pointer
29 to its info structure. */
31 static const bfd_arch_info_type *
32 compatible (const bfd_arch_info_type *a, const bfd_arch_info_type *b)
34 /* If a & b are for different architecture we can do nothing. */
35 if (a->arch != b->arch)
38 /* If a & b are for the same machine then all is well. */
39 if (a->mach == b->mach)
42 /* Otherwise if either a or b is the 'default' machine
43 then it can be polymorphed into the other. */
50 /* So far all newer ARM architecture cores are
51 supersets of previous cores. */
52 if (a->mach < b->mach)
54 else if (a->mach > b->mach)
68 { bfd_mach_arm_2, "arm2" },
69 { bfd_mach_arm_2a, "arm250" },
70 { bfd_mach_arm_2a, "arm3" },
71 { bfd_mach_arm_3, "arm6" },
72 { bfd_mach_arm_3, "arm60" },
73 { bfd_mach_arm_3, "arm600" },
74 { bfd_mach_arm_3, "arm610" },
75 { bfd_mach_arm_3, "arm620" },
76 { bfd_mach_arm_3, "arm7" },
77 { bfd_mach_arm_3, "arm70" },
78 { bfd_mach_arm_3, "arm700" },
79 { bfd_mach_arm_3, "arm700i" },
80 { bfd_mach_arm_3, "arm710" },
81 { bfd_mach_arm_3, "arm7100" },
82 { bfd_mach_arm_3, "arm710c" },
83 { bfd_mach_arm_4T, "arm710t" },
84 { bfd_mach_arm_3, "arm720" },
85 { bfd_mach_arm_4T, "arm720t" },
86 { bfd_mach_arm_4T, "arm740t" },
87 { bfd_mach_arm_3, "arm7500" },
88 { bfd_mach_arm_3, "arm7500fe" },
89 { bfd_mach_arm_3, "arm7d" },
90 { bfd_mach_arm_3, "arm7di" },
91 { bfd_mach_arm_3M, "arm7dm" },
92 { bfd_mach_arm_3M, "arm7dmi" },
93 { bfd_mach_arm_4T, "arm7t" },
94 { bfd_mach_arm_4T, "arm7tdmi" },
95 { bfd_mach_arm_4T, "arm7tdmi-s" },
96 { bfd_mach_arm_3M, "arm7m" },
97 { bfd_mach_arm_4, "arm8" },
98 { bfd_mach_arm_4, "arm810" },
99 { bfd_mach_arm_4, "arm9" },
100 { bfd_mach_arm_4T, "arm920" },
101 { bfd_mach_arm_4T, "arm920t" },
102 { bfd_mach_arm_4T, "arm922t" },
103 { bfd_mach_arm_5TEJ, "arm926ej" },
104 { bfd_mach_arm_5TEJ, "arm926ejs" },
105 { bfd_mach_arm_5TEJ, "arm926ej-s" },
106 { bfd_mach_arm_4T, "arm940t" },
107 { bfd_mach_arm_5TE, "arm946e" },
108 { bfd_mach_arm_5TE, "arm946e-r0" },
109 { bfd_mach_arm_5TE, "arm946e-s" },
110 { bfd_mach_arm_5TE, "arm966e" },
111 { bfd_mach_arm_5TE, "arm966e-r0" },
112 { bfd_mach_arm_5TE, "arm966e-s" },
113 { bfd_mach_arm_5TE, "arm968e-s" },
114 { bfd_mach_arm_5TE, "arm9e" },
115 { bfd_mach_arm_5TE, "arm9e-r0" },
116 { bfd_mach_arm_4T, "arm9tdmi" },
117 { bfd_mach_arm_5TE, "arm1020" },
118 { bfd_mach_arm_5T, "arm1020t" },
119 { bfd_mach_arm_5TE, "arm1020e" },
120 { bfd_mach_arm_5TE, "arm1022e" },
121 { bfd_mach_arm_5TEJ, "arm1026ejs" },
122 { bfd_mach_arm_5TEJ, "arm1026ej-s" },
123 { bfd_mach_arm_5TE, "arm10e" },
124 { bfd_mach_arm_5T, "arm10t" },
125 { bfd_mach_arm_5T, "arm10tdmi" },
126 { bfd_mach_arm_6, "arm1136j-s" },
127 { bfd_mach_arm_6, "arm1136js" },
128 { bfd_mach_arm_6, "arm1136jf-s" },
129 { bfd_mach_arm_6, "arm1136jfs" },
130 { bfd_mach_arm_6KZ, "arm1176jz-s" },
131 { bfd_mach_arm_6KZ, "arm1176jzf-s" },
132 { bfd_mach_arm_6T2, "arm1156t2-s" },
133 { bfd_mach_arm_6T2, "arm1156t2f-s" },
134 { bfd_mach_arm_7, "cortex-a5" },
135 { bfd_mach_arm_7, "cortex-a7" },
136 { bfd_mach_arm_7, "cortex-a8" },
137 { bfd_mach_arm_7, "cortex-a9" },
138 { bfd_mach_arm_7, "cortex-a12" },
139 { bfd_mach_arm_7, "cortex-a15" },
140 { bfd_mach_arm_7, "cortex-a17" },
141 { bfd_mach_arm_8, "cortex-a32" },
142 { bfd_mach_arm_8, "cortex-a35" },
143 { bfd_mach_arm_8, "cortex-a53" },
144 { bfd_mach_arm_8, "cortex-a55" },
145 { bfd_mach_arm_8, "cortex-a57" },
146 { bfd_mach_arm_8, "cortex-a72" },
147 { bfd_mach_arm_8, "cortex-a73" },
148 { bfd_mach_arm_8, "cortex-a75" },
149 { bfd_mach_arm_8, "cortex-a76" },
150 { bfd_mach_arm_6SM, "cortex-m0" },
151 { bfd_mach_arm_6SM, "cortex-m0plus" },
152 { bfd_mach_arm_6SM, "cortex-m1" },
153 { bfd_mach_arm_8M_BASE, "cortex-m23" },
154 { bfd_mach_arm_7, "cortex-m3" },
155 { bfd_mach_arm_8M_MAIN, "cortex-m33" },
156 { bfd_mach_arm_7EM, "cortex-m4" },
157 { bfd_mach_arm_7EM, "cortex-m7" },
158 { bfd_mach_arm_7, "cortex-r4" },
159 { bfd_mach_arm_7, "cortex-r4f" },
160 { bfd_mach_arm_7, "cortex-r5" },
161 { bfd_mach_arm_8R, "cortex-r52" },
162 { bfd_mach_arm_7, "cortex-r7" },
163 { bfd_mach_arm_7, "cortex-r8" },
164 { bfd_mach_arm_4T, "ep9312" },
165 { bfd_mach_arm_8, "exynos-m1" },
166 { bfd_mach_arm_4, "fa526" },
167 { bfd_mach_arm_5TE, "fa606te" },
168 { bfd_mach_arm_5TE, "fa616te" },
169 { bfd_mach_arm_4, "fa626" },
170 { bfd_mach_arm_5TE, "fa626te" },
171 { bfd_mach_arm_5TE, "fa726te" },
172 { bfd_mach_arm_5TE, "fmp626" },
173 { bfd_mach_arm_XScale, "i80200" },
174 { bfd_mach_arm_7, "marvell-pj4" },
175 { bfd_mach_arm_7, "marvell-whitney" },
176 { bfd_mach_arm_6K, "mpcore" },
177 { bfd_mach_arm_6K, "mpcorenovfp" },
178 { bfd_mach_arm_4, "sa1" },
179 { bfd_mach_arm_4, "strongarm" },
180 { bfd_mach_arm_4, "strongarm1" },
181 { bfd_mach_arm_4, "strongarm110" },
182 { bfd_mach_arm_4, "strongarm1100" },
183 { bfd_mach_arm_4, "strongarm1110" },
184 { bfd_mach_arm_XScale, "xscale" },
185 { bfd_mach_arm_8, "xgene1" },
186 { bfd_mach_arm_8, "xgene2" },
187 { bfd_mach_arm_ep9312, "ep9312" },
188 { bfd_mach_arm_iWMMXt, "iwmmxt" },
189 { bfd_mach_arm_iWMMXt2, "iwmmxt2" },
190 { bfd_mach_arm_unknown, "arm_any" }
194 scan (const struct bfd_arch_info *info, const char *string)
198 /* First test for an exact match. */
199 if (strcasecmp (string, info->printable_name) == 0)
202 /* Next check for a processor name instead of an Architecture name. */
203 for (i = sizeof (processors) / sizeof (processors[0]); i--;)
205 if (strcasecmp (string, processors [i].name) == 0)
209 if (i != -1 && info->mach == processors [i].mach)
212 /* Finally check for the default architecture. */
213 if (strcasecmp (string, "arm") == 0)
214 return info->the_default;
219 #define N(number, print, default, next) \
220 { 32, 32, 8, bfd_arch_arm, number, "arm", print, 4, default, compatible, \
221 scan, bfd_arch_default_fill, next }
223 static const bfd_arch_info_type arch_info_struct[] =
225 N (bfd_mach_arm_2, "armv2", FALSE, & arch_info_struct[1]),
226 N (bfd_mach_arm_2a, "armv2a", FALSE, & arch_info_struct[2]),
227 N (bfd_mach_arm_3, "armv3", FALSE, & arch_info_struct[3]),
228 N (bfd_mach_arm_3M, "armv3m", FALSE, & arch_info_struct[4]),
229 N (bfd_mach_arm_4, "armv4", FALSE, & arch_info_struct[5]),
230 N (bfd_mach_arm_4T, "armv4t", FALSE, & arch_info_struct[6]),
231 N (bfd_mach_arm_5, "armv5", FALSE, & arch_info_struct[7]),
232 N (bfd_mach_arm_5T, "armv5t", FALSE, & arch_info_struct[8]),
233 N (bfd_mach_arm_5TE, "armv5te", FALSE, & arch_info_struct[9]),
234 N (bfd_mach_arm_XScale, "xscale", FALSE, & arch_info_struct[10]),
235 N (bfd_mach_arm_ep9312, "ep9312", FALSE, & arch_info_struct[11]),
236 N (bfd_mach_arm_iWMMXt, "iwmmxt", FALSE, & arch_info_struct[12]),
237 N (bfd_mach_arm_iWMMXt2, "iwmmxt2", FALSE, & arch_info_struct[13]),
238 N (bfd_mach_arm_5TEJ, "armv5tej", FALSE, & arch_info_struct[14]),
239 N (bfd_mach_arm_6, "armv6", FALSE, & arch_info_struct[15]),
240 N (bfd_mach_arm_6KZ, "armv6kz", FALSE, & arch_info_struct[16]),
241 N (bfd_mach_arm_6T2, "armv6t2", FALSE, & arch_info_struct[17]),
242 N (bfd_mach_arm_6K, "armv6k", FALSE, & arch_info_struct[18]),
243 N (bfd_mach_arm_7, "armv7", FALSE, & arch_info_struct[19]),
244 N (bfd_mach_arm_6M, "armv6-m", FALSE, & arch_info_struct[20]),
245 N (bfd_mach_arm_6SM, "armv6s-m", FALSE, & arch_info_struct[21]),
246 N (bfd_mach_arm_7EM, "armv7e-m", FALSE, & arch_info_struct[22]),
247 N (bfd_mach_arm_8, "armv8-a", FALSE, & arch_info_struct[23]),
248 N (bfd_mach_arm_8R, "armv8-r", FALSE, & arch_info_struct[24]),
249 N (bfd_mach_arm_8M_BASE, "armv8-m.base", FALSE, & arch_info_struct[25]),
250 N (bfd_mach_arm_8M_MAIN, "armv8-m.main", FALSE, & arch_info_struct[26]),
251 N (bfd_mach_arm_8_1M_MAIN, "armv8.1-m.main", FALSE, & arch_info_struct[27]),
252 N (bfd_mach_arm_unknown, "arm_any", FALSE, NULL)
255 const bfd_arch_info_type bfd_arm_arch =
256 N (0, "arm", TRUE, & arch_info_struct[0]);
258 /* Support functions used by both the COFF and ELF versions of the ARM port. */
260 /* Handle the merging of the 'machine' settings of input file IBFD
261 and an output file OBFD. These values actually represent the
262 different possible ARM architecture variants.
263 Returns TRUE if they were merged successfully or FALSE otherwise. */
266 bfd_arm_merge_machines (bfd *ibfd, bfd *obfd)
268 unsigned int in = bfd_get_mach (ibfd);
269 unsigned int out = bfd_get_mach (obfd);
271 /* If the output architecture is unknown, we now have a value to set. */
272 if (out == bfd_mach_arm_unknown)
273 bfd_set_arch_mach (obfd, bfd_arch_arm, in);
275 /* If the input architecture is unknown,
276 then so must be the output architecture. */
277 else if (in == bfd_mach_arm_unknown)
278 /* FIXME: We ought to have some way to
279 override this on the command line. */
280 bfd_set_arch_mach (obfd, bfd_arch_arm, bfd_mach_arm_unknown);
282 /* If they are the same then nothing needs to be done. */
286 /* Otherwise the general principle that a earlier architecture can be
287 linked with a later architecture to produce a binary that will execute
288 on the later architecture.
290 We fail however if we attempt to link a Cirrus EP9312 binary with an
291 Intel XScale binary, since these architecture have co-processors which
292 will not both be present on the same physical hardware. */
293 else if (in == bfd_mach_arm_ep9312
294 && (out == bfd_mach_arm_XScale
295 || out == bfd_mach_arm_iWMMXt
296 || out == bfd_mach_arm_iWMMXt2))
298 /* xgettext: c-format */
299 _bfd_error_handler (_("\
300 error: %pB is compiled for the EP9312, whereas %pB is compiled for XScale"),
302 bfd_set_error (bfd_error_wrong_format);
305 else if (out == bfd_mach_arm_ep9312
306 && (in == bfd_mach_arm_XScale
307 || in == bfd_mach_arm_iWMMXt
308 || in == bfd_mach_arm_iWMMXt2))
310 /* xgettext: c-format */
311 _bfd_error_handler (_("\
312 error: %pB is compiled for the EP9312, whereas %pB is compiled for XScale"),
314 bfd_set_error (bfd_error_wrong_format);
318 bfd_set_arch_mach (obfd, bfd_arch_arm, in);
327 unsigned char namesz[4]; /* Size of entry's owner string. */
328 unsigned char descsz[4]; /* Size of the note descriptor. */
329 unsigned char type[4]; /* Interpretation of the descriptor. */
330 char name[1]; /* Start of the name+desc data. */
334 arm_check_note (bfd *abfd,
336 bfd_size_type buffer_size,
337 const char *expected_name,
338 char **description_return)
340 unsigned long namesz;
341 unsigned long descsz;
345 if (buffer_size < offsetof (arm_Note, name))
348 /* We have to extract the values this way to allow for a
349 host whose endian-ness is different from the target. */
350 namesz = bfd_get_32 (abfd, buffer);
351 descsz = bfd_get_32 (abfd, buffer + offsetof (arm_Note, descsz));
352 type = bfd_get_32 (abfd, buffer + offsetof (arm_Note, type));
353 descr = (char *) buffer + offsetof (arm_Note, name);
355 /* Check for buffer overflow. */
356 if (namesz + descsz + offsetof (arm_Note, name) > buffer_size)
359 if (expected_name == NULL)
366 if (namesz != ((strlen (expected_name) + 1 + 3) & ~3))
369 if (strcmp (descr, expected_name) != 0)
372 descr += (namesz + 3) & ~3;
375 /* FIXME: We should probably check the type as well. */
378 if (description_return != NULL)
379 * description_return = descr;
384 #define NOTE_ARCH_STRING "arch: "
387 bfd_arm_update_notes (bfd *abfd, const char *note_section)
389 asection * arm_arch_section;
390 bfd_size_type buffer_size;
395 /* Look for a note section. If one is present check the architecture
396 string encoded in it, and set it to the current architecture if it is
398 arm_arch_section = bfd_get_section_by_name (abfd, note_section);
400 if (arm_arch_section == NULL)
403 buffer_size = arm_arch_section->size;
404 if (buffer_size == 0)
407 if (!bfd_malloc_and_get_section (abfd, arm_arch_section, &buffer))
410 /* Parse the note. */
411 if (! arm_check_note (abfd, buffer, buffer_size, NOTE_ARCH_STRING, & arch_string))
414 /* Check the architecture in the note against the architecture of the bfd.
415 Newer architectures versions should not be added here as build attribute
416 are a better mechanism to convey ISA used. */
417 switch (bfd_get_mach (abfd))
420 case bfd_mach_arm_unknown: expected = "unknown"; break;
421 case bfd_mach_arm_2: expected = "armv2"; break;
422 case bfd_mach_arm_2a: expected = "armv2a"; break;
423 case bfd_mach_arm_3: expected = "armv3"; break;
424 case bfd_mach_arm_3M: expected = "armv3M"; break;
425 case bfd_mach_arm_4: expected = "armv4"; break;
426 case bfd_mach_arm_4T: expected = "armv4t"; break;
427 case bfd_mach_arm_5: expected = "armv5"; break;
428 case bfd_mach_arm_5T: expected = "armv5t"; break;
429 case bfd_mach_arm_5TE: expected = "armv5te"; break;
430 case bfd_mach_arm_XScale: expected = "XScale"; break;
431 case bfd_mach_arm_ep9312: expected = "ep9312"; break;
432 case bfd_mach_arm_iWMMXt: expected = "iWMMXt"; break;
433 case bfd_mach_arm_iWMMXt2: expected = "iWMMXt2"; break;
436 if (strcmp (arch_string, expected) != 0)
438 strcpy ((char *) buffer + (offsetof (arm_Note, name)
439 + ((strlen (NOTE_ARCH_STRING) + 3) & ~3)),
442 if (! bfd_set_section_contents (abfd, arm_arch_section, buffer,
443 (file_ptr) 0, buffer_size))
446 /* xgettext: c-format */
447 (_("warning: unable to update contents of %s section in %pB"),
469 /* Newer architectures versions should not be added here as build attribute are
470 a better mechanism to convey ISA used. */
473 { "armv2", bfd_mach_arm_2 },
474 { "armv2a", bfd_mach_arm_2a },
475 { "armv3", bfd_mach_arm_3 },
476 { "armv3M", bfd_mach_arm_3M },
477 { "armv4", bfd_mach_arm_4 },
478 { "armv4t", bfd_mach_arm_4T },
479 { "armv5", bfd_mach_arm_5 },
480 { "armv5t", bfd_mach_arm_5T },
481 { "armv5te", bfd_mach_arm_5TE },
482 { "XScale", bfd_mach_arm_XScale },
483 { "ep9312", bfd_mach_arm_ep9312 },
484 { "iWMMXt", bfd_mach_arm_iWMMXt },
485 { "iWMMXt2", bfd_mach_arm_iWMMXt2 },
486 { "arm_any", bfd_mach_arm_unknown }
489 /* Extract the machine number stored in a note section. */
491 bfd_arm_get_mach_from_notes (bfd *abfd, const char *note_section)
493 asection * arm_arch_section;
494 bfd_size_type buffer_size;
499 /* Look for a note section. If one is present check the architecture
500 string encoded in it, and set it to the current architecture if it is
502 arm_arch_section = bfd_get_section_by_name (abfd, note_section);
504 if (arm_arch_section == NULL)
505 return bfd_mach_arm_unknown;
507 buffer_size = arm_arch_section->size;
508 if (buffer_size == 0)
509 return bfd_mach_arm_unknown;
511 if (!bfd_malloc_and_get_section (abfd, arm_arch_section, &buffer))
514 /* Parse the note. */
515 if (! arm_check_note (abfd, buffer, buffer_size, NOTE_ARCH_STRING, & arch_string))
518 /* Interpret the architecture string. */
519 for (i = ARRAY_SIZE (architectures); i--;)
520 if (strcmp (arch_string, architectures[i].string) == 0)
523 return architectures[i].mach;
529 return bfd_mach_arm_unknown;
533 bfd_is_arm_special_symbol_name (const char * name, int type)
535 /* The ARM compiler outputs several obsolete forms. Recognize them
536 in addition to the standard $a, $t and $d. We are somewhat loose
537 in what we accept here, since the full set is not documented. */
538 if (!name || name[0] != '$')
540 if (name[1] == 'a' || name[1] == 't' || name[1] == 'd')
541 type &= BFD_ARM_SPECIAL_SYM_TYPE_MAP;
542 else if (name[1] == 'm' || name[1] == 'f' || name[1] == 'p')
543 type &= BFD_ARM_SPECIAL_SYM_TYPE_TAG;
544 else if (name[1] >= 'a' && name[1] <= 'z')
545 type &= BFD_ARM_SPECIAL_SYM_TYPE_OTHER;
549 return (type != 0 && (name[2] == 0 || name[2] == '.'));