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_unknown, "arm_any", FALSE, NULL)
254 const bfd_arch_info_type bfd_arm_arch =
255 N (0, "arm", TRUE, & arch_info_struct[0]);
257 /* Support functions used by both the COFF and ELF versions of the ARM port. */
259 /* Handle the merging of the 'machine' settings of input file IBFD
260 and an output file OBFD. These values actually represent the
261 different possible ARM architecture variants.
262 Returns TRUE if they were merged successfully or FALSE otherwise. */
265 bfd_arm_merge_machines (bfd *ibfd, bfd *obfd)
267 unsigned int in = bfd_get_mach (ibfd);
268 unsigned int out = bfd_get_mach (obfd);
270 /* If the output architecture is unknown, we now have a value to set. */
271 if (out == bfd_mach_arm_unknown)
272 bfd_set_arch_mach (obfd, bfd_arch_arm, in);
274 /* If the input architecture is unknown,
275 then so must be the output architecture. */
276 else if (in == bfd_mach_arm_unknown)
277 /* FIXME: We ought to have some way to
278 override this on the command line. */
279 bfd_set_arch_mach (obfd, bfd_arch_arm, bfd_mach_arm_unknown);
281 /* If they are the same then nothing needs to be done. */
285 /* Otherwise the general principle that a earlier architecture can be
286 linked with a later architecture to produce a binary that will execute
287 on the later architecture.
289 We fail however if we attempt to link a Cirrus EP9312 binary with an
290 Intel XScale binary, since these architecture have co-processors which
291 will not both be present on the same physical hardware. */
292 else if (in == bfd_mach_arm_ep9312
293 && (out == bfd_mach_arm_XScale
294 || out == bfd_mach_arm_iWMMXt
295 || out == bfd_mach_arm_iWMMXt2))
297 /* xgettext: c-format */
298 _bfd_error_handler (_("\
299 error: %pB is compiled for the EP9312, whereas %pB is compiled for XScale"),
301 bfd_set_error (bfd_error_wrong_format);
304 else if (out == bfd_mach_arm_ep9312
305 && (in == bfd_mach_arm_XScale
306 || in == bfd_mach_arm_iWMMXt
307 || in == bfd_mach_arm_iWMMXt2))
309 /* xgettext: c-format */
310 _bfd_error_handler (_("\
311 error: %pB is compiled for the EP9312, whereas %pB is compiled for XScale"),
313 bfd_set_error (bfd_error_wrong_format);
317 bfd_set_arch_mach (obfd, bfd_arch_arm, in);
326 unsigned char namesz[4]; /* Size of entry's owner string. */
327 unsigned char descsz[4]; /* Size of the note descriptor. */
328 unsigned char type[4]; /* Interpretation of the descriptor. */
329 char name[1]; /* Start of the name+desc data. */
333 arm_check_note (bfd *abfd,
335 bfd_size_type buffer_size,
336 const char *expected_name,
337 char **description_return)
339 unsigned long namesz;
340 unsigned long descsz;
344 if (buffer_size < offsetof (arm_Note, name))
347 /* We have to extract the values this way to allow for a
348 host whose endian-ness is different from the target. */
349 namesz = bfd_get_32 (abfd, buffer);
350 descsz = bfd_get_32 (abfd, buffer + offsetof (arm_Note, descsz));
351 type = bfd_get_32 (abfd, buffer + offsetof (arm_Note, type));
352 descr = (char *) buffer + offsetof (arm_Note, name);
354 /* Check for buffer overflow. */
355 if (namesz + descsz + offsetof (arm_Note, name) > buffer_size)
358 if (expected_name == NULL)
365 if (namesz != ((strlen (expected_name) + 1 + 3) & ~3))
368 if (strcmp (descr, expected_name) != 0)
371 descr += (namesz + 3) & ~3;
374 /* FIXME: We should probably check the type as well. */
377 if (description_return != NULL)
378 * description_return = descr;
383 #define NOTE_ARCH_STRING "arch: "
386 bfd_arm_update_notes (bfd *abfd, const char *note_section)
388 asection * arm_arch_section;
389 bfd_size_type buffer_size;
394 /* Look for a note section. If one is present check the architecture
395 string encoded in it, and set it to the current architecture if it is
397 arm_arch_section = bfd_get_section_by_name (abfd, note_section);
399 if (arm_arch_section == NULL)
402 buffer_size = arm_arch_section->size;
403 if (buffer_size == 0)
406 if (!bfd_malloc_and_get_section (abfd, arm_arch_section, &buffer))
409 /* Parse the note. */
410 if (! arm_check_note (abfd, buffer, buffer_size, NOTE_ARCH_STRING, & arch_string))
413 /* Check the architecture in the note against the architecture of the bfd.
414 Newer architectures versions should not be added here as build attribute
415 are a better mechanism to convey ISA used. */
416 switch (bfd_get_mach (abfd))
419 case bfd_mach_arm_unknown: expected = "unknown"; break;
420 case bfd_mach_arm_2: expected = "armv2"; break;
421 case bfd_mach_arm_2a: expected = "armv2a"; break;
422 case bfd_mach_arm_3: expected = "armv3"; break;
423 case bfd_mach_arm_3M: expected = "armv3M"; break;
424 case bfd_mach_arm_4: expected = "armv4"; break;
425 case bfd_mach_arm_4T: expected = "armv4t"; break;
426 case bfd_mach_arm_5: expected = "armv5"; break;
427 case bfd_mach_arm_5T: expected = "armv5t"; break;
428 case bfd_mach_arm_5TE: expected = "armv5te"; break;
429 case bfd_mach_arm_XScale: expected = "XScale"; break;
430 case bfd_mach_arm_ep9312: expected = "ep9312"; break;
431 case bfd_mach_arm_iWMMXt: expected = "iWMMXt"; break;
432 case bfd_mach_arm_iWMMXt2: expected = "iWMMXt2"; break;
435 if (strcmp (arch_string, expected) != 0)
437 strcpy ((char *) buffer + (offsetof (arm_Note, name)
438 + ((strlen (NOTE_ARCH_STRING) + 3) & ~3)),
441 if (! bfd_set_section_contents (abfd, arm_arch_section, buffer,
442 (file_ptr) 0, buffer_size))
445 /* xgettext: c-format */
446 (_("warning: unable to update contents of %s section in %pB"),
468 /* Newer architectures versions should not be added here as build attribute are
469 a better mechanism to convey ISA used. */
472 { "armv2", bfd_mach_arm_2 },
473 { "armv2a", bfd_mach_arm_2a },
474 { "armv3", bfd_mach_arm_3 },
475 { "armv3M", bfd_mach_arm_3M },
476 { "armv4", bfd_mach_arm_4 },
477 { "armv4t", bfd_mach_arm_4T },
478 { "armv5", bfd_mach_arm_5 },
479 { "armv5t", bfd_mach_arm_5T },
480 { "armv5te", bfd_mach_arm_5TE },
481 { "XScale", bfd_mach_arm_XScale },
482 { "ep9312", bfd_mach_arm_ep9312 },
483 { "iWMMXt", bfd_mach_arm_iWMMXt },
484 { "iWMMXt2", bfd_mach_arm_iWMMXt2 },
485 { "arm_any", bfd_mach_arm_unknown }
488 /* Extract the machine number stored in a note section. */
490 bfd_arm_get_mach_from_notes (bfd *abfd, const char *note_section)
492 asection * arm_arch_section;
493 bfd_size_type buffer_size;
498 /* Look for a note section. If one is present check the architecture
499 string encoded in it, and set it to the current architecture if it is
501 arm_arch_section = bfd_get_section_by_name (abfd, note_section);
503 if (arm_arch_section == NULL)
504 return bfd_mach_arm_unknown;
506 buffer_size = arm_arch_section->size;
507 if (buffer_size == 0)
508 return bfd_mach_arm_unknown;
510 if (!bfd_malloc_and_get_section (abfd, arm_arch_section, &buffer))
513 /* Parse the note. */
514 if (! arm_check_note (abfd, buffer, buffer_size, NOTE_ARCH_STRING, & arch_string))
517 /* Interpret the architecture string. */
518 for (i = ARRAY_SIZE (architectures); i--;)
519 if (strcmp (arch_string, architectures[i].string) == 0)
522 return architectures[i].mach;
528 return bfd_mach_arm_unknown;
532 bfd_is_arm_special_symbol_name (const char * name, int type)
534 /* The ARM compiler outputs several obsolete forms. Recognize them
535 in addition to the standard $a, $t and $d. We are somewhat loose
536 in what we accept here, since the full set is not documented. */
537 if (!name || name[0] != '$')
539 if (name[1] == 'a' || name[1] == 't' || name[1] == 'd')
540 type &= BFD_ARM_SPECIAL_SYM_TYPE_MAP;
541 else if (name[1] == 'm' || name[1] == 'f' || name[1] == 'p')
542 type &= BFD_ARM_SPECIAL_SYM_TYPE_TAG;
543 else if (name[1] >= 'a' && name[1] <= 'z')
544 type &= BFD_ARM_SPECIAL_SYM_TYPE_OTHER;
548 return (type != 0 && (name[2] == 0 || name[2] == '.'));