Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* ARC-specific support for 32-bit ELF |
b90efa5b | 2 | Copyright (C) 1994-2015 Free Software Foundation, Inc. |
886a2506 | 3 | Contributed by Cupertino Miranda (cmiranda@synopsys.com). |
252b5132 | 4 | |
0d2bcfaf | 5 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 6 | |
0d2bcfaf NC |
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 | |
cd123cb7 | 9 | the Free Software Foundation; either version 3 of the License, or |
0d2bcfaf | 10 | (at your option) any later version. |
252b5132 | 11 | |
0d2bcfaf NC |
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. | |
252b5132 | 16 | |
0d2bcfaf NC |
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 | |
47b0e7ad NC |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
20 | MA 02110-1301, USA. */ | |
252b5132 | 21 | |
252b5132 | 22 | #include "sysdep.h" |
3db64b00 | 23 | #include "bfd.h" |
252b5132 RH |
24 | #include "libbfd.h" |
25 | #include "elf-bfd.h" | |
26 | #include "elf/arc.h" | |
ea04a8f6 | 27 | #include "libiberty.h" |
886a2506 NC |
28 | #include "opcode/arc-func.h" |
29 | ||
30 | #define ARC_DEBUG(...) | |
31 | #define DEBUG(...) printf (__ARGV__) | |
32 | #define DEBUG_ARC_RELOC(A) | |
33 | ||
34 | struct arc_local_data | |
35 | { | |
36 | bfd_vma sdata_begin_symbol_vma; | |
37 | asection * sdata_output_section; | |
38 | bfd_vma got_symbol_vma; | |
39 | }; | |
40 | ||
41 | struct arc_local_data global_arc_data = | |
42 | { | |
43 | .sdata_begin_symbol_vma = 0, | |
44 | .sdata_output_section = NULL, | |
45 | .got_symbol_vma = 0, | |
46 | }; | |
47 | ||
48 | struct dynamic_sections | |
49 | { | |
50 | bfd_boolean initialized; | |
51 | asection * sgot; | |
52 | asection * srelgot; | |
53 | asection * sgotplt; | |
54 | asection * sdyn; | |
55 | asection * splt; | |
56 | asection * srelplt; | |
57 | }; | |
58 | ||
59 | static struct dynamic_sections | |
60 | arc_create_dynamic_sections (bfd * abfd, struct bfd_link_info *info); | |
61 | ||
62 | enum dyn_section_types | |
63 | { | |
64 | got = 0, | |
65 | relgot, | |
66 | gotplt, | |
67 | dyn, | |
68 | plt, | |
69 | relplt, | |
70 | DYN_SECTION_TYPES_END | |
71 | }; | |
72 | ||
73 | const char * dyn_section_names[DYN_SECTION_TYPES_END] = | |
74 | { | |
75 | ".got", | |
76 | ".rela.got", | |
77 | ".got.plt", | |
78 | ".dynamic", | |
79 | ".plt", | |
80 | ".rela.plt" | |
81 | }; | |
82 | ||
83 | /* The default symbols representing the init and fini dyn values. | |
84 | TODO: Check what is the relation of those strings with arclinux.em | |
85 | and DT_INIT. */ | |
86 | #define INIT_SYM_STRING "_init" | |
87 | #define FINI_SYM_STRING "_fini" | |
88 | ||
89 | char * init_str = INIT_SYM_STRING; | |
90 | char * fini_str = FINI_SYM_STRING; | |
91 | ||
92 | ||
93 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ | |
94 | case VALUE: \ | |
95 | return #TYPE; \ | |
96 | break; | |
97 | ||
98 | static ATTRIBUTE_UNUSED const char * | |
99 | reloc_type_to_name (unsigned int type) | |
100 | { | |
101 | switch (type) | |
102 | { | |
103 | #include "elf/arc-reloc.def" | |
104 | ||
105 | default: | |
106 | return "UNKNOWN"; | |
107 | break; | |
108 | } | |
109 | } | |
110 | #undef ARC_RELOC_HOWTO | |
252b5132 | 111 | |
252b5132 RH |
112 | /* Try to minimize the amount of space occupied by relocation tables |
113 | on the ROM (not that the ROM won't be swamped by other ELF overhead). */ | |
0d2bcfaf | 114 | |
886a2506 NC |
115 | #define USE_REL 1 |
116 | ||
117 | static ATTRIBUTE_UNUSED bfd_boolean | |
118 | is_reloc_PC_relative (reloc_howto_type *howto) | |
119 | { | |
120 | return (strstr (howto->name, "PC") != NULL) ? TRUE : FALSE; | |
121 | } | |
122 | ||
123 | static bfd_boolean | |
124 | is_reloc_SDA_relative (reloc_howto_type *howto) | |
125 | { | |
126 | return (strstr (howto->name, "SDA") != NULL) ? TRUE : FALSE; | |
127 | } | |
128 | ||
129 | static bfd_boolean | |
130 | is_reloc_for_GOT (reloc_howto_type * howto) | |
131 | { | |
132 | return (strstr (howto->name, "GOT") != NULL) ? TRUE : FALSE; | |
133 | } | |
134 | ||
135 | static bfd_boolean | |
136 | is_reloc_for_PLT (reloc_howto_type * howto) | |
137 | { | |
138 | return (strstr (howto->name, "PLT") != NULL) ? TRUE : FALSE; | |
139 | } | |
140 | ||
141 | #define arc_bfd_get_8(A,B,C) bfd_get_8(A,B) | |
142 | #define arc_bfd_get_16(A,B,C) bfd_get_16(A,B) | |
143 | #define arc_bfd_put_8(A,B,C,D) bfd_put_8(A,B,C) | |
144 | #define arc_bfd_put_16(A,B,C,D) bfd_put_16(A,B,C) | |
145 | ||
146 | static long | |
147 | arc_bfd_get_32 (bfd * abfd, void *loc, asection * input_section) | |
148 | { | |
149 | long insn = bfd_get_32 (abfd, loc); | |
150 | ||
151 | if (!bfd_big_endian (abfd) | |
152 | && input_section | |
153 | && (input_section->flags & SEC_CODE)) | |
154 | insn = ((0x0000fffff & insn) << 16) | ((0xffff0000 & insn) >> 16); | |
155 | ||
156 | return insn; | |
157 | } | |
158 | ||
159 | static void | |
160 | arc_bfd_put_32 (bfd * abfd, long insn, void *loc, asection * input_section) | |
161 | { | |
162 | if (!bfd_big_endian (abfd) | |
163 | && input_section | |
164 | && (input_section->flags & SEC_CODE)) | |
165 | insn = ((0x0000fffff & insn) << 16) | ((0xffff0000 & insn) >> 16); | |
166 | ||
167 | bfd_put_32 (abfd, insn, loc); | |
168 | } | |
252b5132 | 169 | |
47b0e7ad | 170 | static bfd_reloc_status_type |
886a2506 NC |
171 | arc_elf_reloc (bfd *abfd ATTRIBUTE_UNUSED, |
172 | arelent *reloc_entry, | |
173 | asymbol *symbol_in, | |
174 | void *data ATTRIBUTE_UNUSED, | |
175 | asection *input_section, | |
176 | bfd *output_bfd, | |
177 | char ** error_message ATTRIBUTE_UNUSED) | |
178 | { | |
179 | if (output_bfd != NULL) | |
180 | { | |
181 | reloc_entry->address += input_section->output_offset; | |
182 | ||
183 | /* In case of relocateable link and if the reloc is against a | |
184 | section symbol, the addend needs to be adjusted according to | |
185 | where the section symbol winds up in the output section. */ | |
186 | if ((symbol_in->flags & BSF_SECTION_SYM) && symbol_in->section) | |
187 | reloc_entry->addend += symbol_in->section->output_offset; | |
188 | ||
189 | return bfd_reloc_ok; | |
190 | } | |
191 | ||
192 | return bfd_reloc_continue; | |
193 | } | |
194 | ||
195 | ||
196 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ | |
197 | TYPE = VALUE, | |
198 | enum howto_list | |
199 | { | |
200 | #include "elf/arc-reloc.def" | |
201 | HOWTO_LIST_LAST | |
202 | }; | |
203 | #undef ARC_RELOC_HOWTO | |
204 | ||
205 | #define ARC_RELOC_HOWTO(TYPE, VALUE, RSIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ | |
206 | [TYPE] = HOWTO (R_##TYPE, 0, RSIZE, BITSIZE, FALSE, 0, complain_overflow_##OVERFLOW, arc_elf_reloc, #TYPE, FALSE, 0, 0, FALSE), | |
207 | ||
208 | static struct reloc_howto_struct elf_arc_howto_table[] = | |
209 | { | |
210 | #include "elf/arc-reloc.def" | |
211 | /* Example of what is generated by the preprocessor. Currently kept as an example. | |
212 | HOWTO (R_ARC_NONE, // Type. | |
213 | 0, // Rightshift. | |
214 | 2, // Size (0 = byte, 1 = short, 2 = long). | |
215 | 32, // Bitsize. | |
216 | FALSE, // PC_relative. | |
217 | 0, // Bitpos. | |
218 | complain_overflow_bitfield, // Complain_on_overflow. | |
219 | bfd_elf_generic_reloc, // Special_function. | |
220 | "R_ARC_NONE", // Name. | |
221 | TRUE, // Partial_inplace. | |
222 | 0, // Src_mask. | |
223 | 0, // Dst_mask. | |
224 | FALSE), // PCrel_offset. | |
225 | */ | |
226 | }; | |
227 | #undef ARC_RELOC_HOWTO | |
228 | ||
229 | static void arc_elf_howto_init (void) | |
230 | { | |
231 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ | |
232 | elf_arc_howto_table[TYPE].pc_relative = (strstr (#FORMULA, " P ") != NULL); | |
233 | ||
234 | #include "elf/arc-reloc.def" | |
47b0e7ad | 235 | } |
886a2506 | 236 | #undef ARC_RELOC_HOWTO |
47b0e7ad | 237 | |
886a2506 NC |
238 | |
239 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ | |
240 | [TYPE] = VALUE, | |
241 | const int howto_table_lookup[] = | |
242 | { | |
243 | #include "elf/arc-reloc.def" | |
252b5132 | 244 | }; |
886a2506 NC |
245 | #undef ARC_RELOC_HOWTO |
246 | ||
247 | #define ARC_ELF_HOWTO(r_type) \ | |
248 | (&elf_arc_howto_table[r_type]) | |
252b5132 RH |
249 | |
250 | /* Map BFD reloc types to ARC ELF reloc types. */ | |
251 | ||
252 | struct arc_reloc_map | |
253 | { | |
254 | bfd_reloc_code_real_type bfd_reloc_val; | |
886a2506 | 255 | unsigned char elf_reloc_val; |
252b5132 RH |
256 | }; |
257 | ||
886a2506 NC |
258 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ |
259 | { BFD_RELOC_##TYPE, R_##TYPE }, | |
252b5132 RH |
260 | static const struct arc_reloc_map arc_reloc_map[] = |
261 | { | |
886a2506 NC |
262 | #include "elf/arc-reloc.def" |
263 | {BFD_RELOC_NONE, R_ARC_NONE}, | |
264 | {BFD_RELOC_8, R_ARC_8}, | |
265 | {BFD_RELOC_16, R_ARC_16}, | |
266 | {BFD_RELOC_24, R_ARC_24}, | |
267 | {BFD_RELOC_32, R_ARC_32}, | |
252b5132 | 268 | }; |
886a2506 | 269 | #undef ARC_RELOC_HOWTO |
252b5132 RH |
270 | |
271 | static reloc_howto_type * | |
886a2506 | 272 | bfd_elf32_bfd_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, |
47b0e7ad | 273 | bfd_reloc_code_real_type code) |
252b5132 RH |
274 | { |
275 | unsigned int i; | |
886a2506 NC |
276 | static int fully_initialized = FALSE; |
277 | ||
278 | if (fully_initialized == FALSE) | |
279 | { | |
280 | arc_elf_howto_init (); | |
281 | fully_initialized = TRUE; /* TODO: CHECK THIS IF IT STOPS WORKING. */ | |
282 | } | |
252b5132 | 283 | |
ea04a8f6 | 284 | for (i = ARRAY_SIZE (arc_reloc_map); i--;) |
886a2506 NC |
285 | { |
286 | if (arc_reloc_map[i].bfd_reloc_val == code) | |
287 | return elf_arc_howto_table + arc_reloc_map[i].elf_reloc_val; | |
288 | } | |
ea04a8f6 | 289 | |
252b5132 RH |
290 | return NULL; |
291 | } | |
292 | ||
157090f7 | 293 | static reloc_howto_type * |
886a2506 | 294 | bfd_elf32_bfd_reloc_name_lookup (bfd * abfd ATTRIBUTE_UNUSED, const char *r_name) |
157090f7 AM |
295 | { |
296 | unsigned int i; | |
297 | ||
886a2506 | 298 | for (i = 0; i < ARRAY_SIZE (elf_arc_howto_table); i++) |
157090f7 AM |
299 | if (elf_arc_howto_table[i].name != NULL |
300 | && strcasecmp (elf_arc_howto_table[i].name, r_name) == 0) | |
886a2506 | 301 | return elf_arc_howto_table + i; |
157090f7 AM |
302 | |
303 | return NULL; | |
304 | } | |
305 | ||
252b5132 | 306 | |
886a2506 | 307 | /* Set the howto pointer for an ARC ELF reloc. */ |
252b5132 | 308 | static void |
886a2506 NC |
309 | arc_info_to_howto_rel (bfd * abfd ATTRIBUTE_UNUSED, |
310 | arelent * cache_ptr, | |
311 | Elf_Internal_Rela * dst) | |
252b5132 RH |
312 | { |
313 | unsigned int r_type; | |
314 | ||
315 | r_type = ELF32_R_TYPE (dst->r_info); | |
886a2506 | 316 | BFD_ASSERT (r_type < (unsigned int) R_ARC_max); |
252b5132 RH |
317 | cache_ptr->howto = &elf_arc_howto_table[r_type]; |
318 | } | |
319 | ||
320 | /* Set the right machine number for an ARC ELF file. */ | |
b34976b6 | 321 | static bfd_boolean |
886a2506 | 322 | arc_elf_object_p (bfd * abfd) |
252b5132 | 323 | { |
886a2506 NC |
324 | /* Make sure this is initialised, or you'll have the potential of passing |
325 | garbage---or misleading values---into the call to | |
326 | bfd_default_set_arch_mach (). */ | |
327 | int mach = bfd_mach_arc_arc700; | |
328 | unsigned long arch = elf_elfheader (abfd)->e_flags & EF_ARC_MACH_MSK; | |
329 | unsigned e_machine = elf_elfheader (abfd)->e_machine; | |
252b5132 | 330 | |
886a2506 | 331 | if (e_machine == EM_ARC_COMPACT || e_machine == EM_ARC_COMPACT2) |
252b5132 | 332 | { |
0d2bcfaf NC |
333 | switch (arch) |
334 | { | |
886a2506 NC |
335 | case E_ARC_MACH_ARC600: |
336 | mach = bfd_mach_arc_arc600; | |
337 | break; | |
338 | case E_ARC_MACH_ARC601: | |
339 | mach = bfd_mach_arc_arc601; | |
340 | break; | |
341 | case E_ARC_MACH_ARC700: | |
342 | mach = bfd_mach_arc_arc700; | |
343 | break; | |
344 | case EF_ARC_CPU_ARCV2HS: | |
345 | case EF_ARC_CPU_ARCV2EM: | |
346 | mach = bfd_mach_arc_arcv2; | |
347 | break; | |
348 | default: | |
349 | mach = (e_machine == EM_ARC_COMPACT) ? | |
350 | bfd_mach_arc_arc700 : bfd_mach_arc_arcv2; | |
351 | break; | |
352 | } | |
353 | } | |
354 | else | |
355 | { | |
356 | if (e_machine == EM_ARC) | |
357 | { | |
358 | (*_bfd_error_handler) | |
359 | (_("Error: The ARC4 architecture is no longer supported.\n")); | |
360 | return FALSE; | |
361 | } | |
362 | else | |
363 | { | |
364 | (*_bfd_error_handler) | |
365 | (_("Warning: unset or old architecture flags. \n" | |
366 | " Use default machine.\n")); | |
0d2bcfaf | 367 | } |
252b5132 | 368 | } |
886a2506 | 369 | |
0d2bcfaf | 370 | return bfd_default_set_arch_mach (abfd, bfd_arch_arc, mach); |
252b5132 RH |
371 | } |
372 | ||
373 | /* The final processing done just before writing out an ARC ELF object file. | |
374 | This gets the ARC architecture right based on the machine number. */ | |
375 | ||
376 | static void | |
886a2506 | 377 | arc_elf_final_write_processing (bfd * abfd, bfd_boolean linker ATTRIBUTE_UNUSED) |
252b5132 | 378 | { |
252b5132 | 379 | unsigned long val; |
886a2506 | 380 | unsigned long emf; |
252b5132 | 381 | |
0d2bcfaf | 382 | switch (bfd_get_mach (abfd)) |
252b5132 | 383 | { |
886a2506 NC |
384 | case bfd_mach_arc_arc600: |
385 | val = E_ARC_MACH_ARC600; | |
386 | emf = EM_ARC_COMPACT; | |
0d2bcfaf | 387 | break; |
886a2506 NC |
388 | case bfd_mach_arc_arc601: |
389 | val = E_ARC_MACH_ARC601; | |
390 | emf = EM_ARC_COMPACT; | |
0d2bcfaf | 391 | break; |
886a2506 NC |
392 | case bfd_mach_arc_arc700: |
393 | val = E_ARC_MACH_ARC700; | |
394 | emf = EM_ARC_COMPACT; | |
0d2bcfaf | 395 | break; |
886a2506 NC |
396 | case bfd_mach_arc_arcv2: |
397 | val = EF_ARC_CPU_GENERIC; | |
398 | emf = EM_ARC_COMPACT2; | |
399 | /* TODO: Check validity of this. It can also be ARCV2EM here. | |
400 | Previous version sets the e_machine here. */ | |
0d2bcfaf | 401 | break; |
886a2506 NC |
402 | default: |
403 | abort (); | |
252b5132 | 404 | } |
886a2506 | 405 | elf_elfheader (abfd)->e_flags &= ~EF_ARC_MACH; |
252b5132 | 406 | elf_elfheader (abfd)->e_flags |= val; |
886a2506 NC |
407 | elf_elfheader (abfd)->e_machine = emf; |
408 | ||
409 | /* Record whatever is the current syscall ABI version. */ | |
410 | elf_elfheader (abfd)->e_flags |= E_ARC_OSABI_CURRENT; | |
252b5132 RH |
411 | } |
412 | ||
886a2506 NC |
413 | #define BFD_DEBUG_PIC(...) |
414 | ||
415 | struct arc_relocation_data | |
416 | { | |
417 | bfd_vma reloc_offset; | |
418 | bfd_vma reloc_addend; | |
419 | bfd_vma got_offset_value; | |
420 | ||
421 | bfd_vma sym_value; | |
422 | asection * sym_section; | |
423 | ||
424 | reloc_howto_type *howto; | |
425 | ||
426 | asection * input_section; | |
427 | ||
428 | bfd_vma sdata_begin_symbol_vma; | |
429 | bfd_boolean sdata_begin_symbol_vma_set; | |
430 | bfd_vma got_symbol_vma; | |
431 | ||
432 | bfd_boolean should_relocate; | |
433 | }; | |
434 | ||
435 | static void | |
436 | debug_arc_reloc (struct arc_relocation_data reloc_data) | |
437 | { | |
438 | fprintf (stderr, "Reloc type=%s, should_relocate = %s\n", | |
439 | reloc_data.howto->name, | |
440 | reloc_data.should_relocate ? "true" : "false"); | |
441 | fprintf (stderr, " offset = 0x%x, addend = 0x%x\n", | |
442 | (unsigned int) reloc_data.reloc_offset, | |
443 | (unsigned int) reloc_data.reloc_addend); | |
444 | fprintf (stderr, " Symbol:\n"); | |
445 | fprintf (stderr, " value = 0x%08x\n", | |
446 | (unsigned int) reloc_data.sym_value); | |
447 | if (reloc_data.sym_section != NULL) | |
448 | { | |
449 | fprintf (stderr, "IN IF\n"); | |
450 | fprintf (stderr, | |
451 | " section name = %s, output_offset 0x%08x, output_section->vma = 0x%08x\n", | |
452 | reloc_data.sym_section->name, | |
453 | (unsigned int) reloc_data.sym_section->output_offset, | |
454 | (unsigned int) reloc_data.sym_section->output_section->vma); | |
455 | } | |
456 | else | |
457 | fprintf (stderr, " symbol section is NULL\n"); | |
458 | ||
459 | fprintf (stderr, " Input_section:\n"); | |
460 | if (reloc_data.input_section != NULL) | |
461 | { | |
462 | fprintf (stderr, | |
463 | " section name = %s, output_offset 0x%08x, output_section->vma = 0x%08x\n", | |
464 | reloc_data.input_section->name, | |
465 | (unsigned int) reloc_data.input_section->output_offset, | |
466 | (unsigned int) reloc_data.input_section->output_section->vma); | |
467 | fprintf (stderr, " changed_address = 0x%08x\n", | |
468 | (unsigned int) (reloc_data.input_section->output_section->vma + | |
469 | reloc_data.input_section->output_offset + | |
470 | reloc_data.reloc_offset)); | |
471 | } | |
472 | else | |
473 | fprintf (stderr, " input section is NULL\n"); | |
474 | } | |
475 | ||
476 | #define S (reloc_data.sym_value \ | |
477 | + reloc_data.sym_section->output_offset \ | |
478 | + reloc_data.sym_section->output_section->vma) | |
479 | #define A (reloc_data.reloc_addend) | |
480 | #define B (0) | |
481 | #define G (reloc_data.got_offset_value) | |
482 | #define GOT (reloc_data.got_symbol_vma + 12) | |
483 | #define L (reloc_data.sym_value \ | |
484 | + reloc_data.sym_section->output_section->vma \ | |
485 | + reloc_data.sym_section->output_offset) | |
486 | #define MES (0) | |
487 | /* P: relative offset to PCL The offset should be to the current location | |
488 | aligned to 32 bits. */ | |
489 | #define P ( \ | |
490 | (reloc_data.input_section->output_section->vma \ | |
491 | + reloc_data.input_section->output_offset \ | |
492 | + (reloc_data.reloc_offset - (bitsize >= 32 ? 4 : 0)) \ | |
493 | ) & ~0x3) | |
494 | #define SECTSTAR (reloc_data.input_section->output_offset) | |
495 | #define SECTSTART (reloc_data.input_section->output_offset) | |
496 | #define _SDA_BASE_ (reloc_data.sdata_begin_symbol_vma) | |
497 | ||
498 | #define none (0) | |
499 | ||
500 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ | |
501 | case R_##TYPE: \ | |
502 | { \ | |
503 | bfd_vma bitsize ATTRIBUTE_UNUSED = BITSIZE; \ | |
504 | relocation = FORMULA ; \ | |
505 | insn = RELOC_FUNCTION (insn, relocation); \ | |
506 | } \ | |
507 | break; | |
508 | ||
509 | static bfd_reloc_status_type | |
510 | arc_do_relocation (bfd_byte * contents, struct arc_relocation_data reloc_data) | |
511 | { | |
512 | bfd_vma relocation = 0; | |
513 | bfd_vma insn; | |
514 | bfd_vma orig_insn ATTRIBUTE_UNUSED; | |
515 | ||
516 | if (reloc_data.should_relocate == FALSE) | |
517 | return bfd_reloc_notsupported; | |
518 | ||
519 | switch (reloc_data.howto->size) | |
520 | { | |
521 | case 2: | |
522 | insn = arc_bfd_get_32 (reloc_data.input_section->owner, | |
523 | contents + reloc_data.reloc_offset, | |
524 | reloc_data.input_section); | |
525 | break; | |
526 | case 1: | |
527 | case 0: | |
528 | insn = arc_bfd_get_16 (reloc_data.input_section->owner, | |
529 | contents + reloc_data.reloc_offset, | |
530 | reloc_data.input_section); | |
531 | break; | |
532 | default: | |
533 | insn = 0; | |
534 | BFD_ASSERT (0); | |
535 | break; | |
536 | } | |
537 | ||
538 | orig_insn = insn; | |
539 | ||
540 | switch (reloc_data.howto->type) | |
541 | { | |
542 | #include "elf/arc-reloc.def" | |
543 | ||
544 | default: | |
545 | BFD_ASSERT (0); | |
546 | break; | |
547 | } | |
548 | ||
549 | /* Check for relocation overflow. */ | |
550 | if (reloc_data.howto->complain_on_overflow != complain_overflow_dont) | |
551 | { | |
552 | bfd_reloc_status_type flag; | |
553 | flag = bfd_check_overflow (reloc_data.howto->complain_on_overflow, | |
554 | reloc_data.howto->bitsize, | |
555 | reloc_data.howto->rightshift, | |
556 | bfd_arch_bits_per_address (reloc_data.input_section->owner), | |
557 | relocation); | |
558 | ||
559 | #undef DEBUG_ARC_RELOC | |
560 | #define DEBUG_ARC_RELOC(A) debug_arc_reloc (A) | |
561 | if (flag != bfd_reloc_ok) | |
562 | { | |
563 | fprintf (stderr, "Relocation overflows !!!!\n"); | |
564 | ||
565 | DEBUG_ARC_RELOC (reloc_data); | |
566 | ||
567 | fprintf (stderr, | |
568 | "Relocation value = signed -> %d, unsigned -> %u, hex -> (0x%08x)\n", | |
569 | (int) relocation, | |
570 | (unsigned int) relocation, | |
571 | (unsigned int) relocation); | |
572 | return flag; | |
573 | } | |
574 | } | |
575 | #undef DEBUG_ARC_RELOC | |
576 | #define DEBUG_ARC_RELOC(A) | |
577 | ||
578 | switch (reloc_data.howto->size) | |
579 | { | |
580 | case 2: | |
581 | arc_bfd_put_32 (reloc_data.input_section->owner, insn, | |
582 | contents + reloc_data.reloc_offset, | |
583 | reloc_data.input_section); | |
584 | break; | |
585 | case 1: | |
586 | case 0: | |
587 | arc_bfd_put_16 (reloc_data.input_section->owner, insn, | |
588 | contents + reloc_data.reloc_offset, | |
589 | reloc_data.input_section); | |
590 | break; | |
591 | default: | |
592 | ARC_DEBUG ("size = %d\n", reloc_data.howto->size); | |
593 | BFD_ASSERT (0); | |
594 | break; | |
595 | } | |
596 | ||
597 | return bfd_reloc_ok; | |
598 | } | |
599 | #undef S | |
600 | #undef A | |
601 | #undef B | |
602 | #undef G | |
603 | #undef GOT | |
604 | #undef L | |
605 | #undef MES | |
606 | #undef P | |
607 | #undef SECTSTAR | |
608 | #undef SECTSTART | |
609 | #undef _SDA_BASE_ | |
610 | #undef none | |
611 | ||
612 | #undef ARC_RELOC_HOWTO | |
613 | ||
614 | static bfd_vma * | |
615 | arc_get_local_got_offsets (bfd * abfd) | |
616 | { | |
617 | static bfd_vma *local_got_offsets = NULL; | |
618 | ||
619 | if (local_got_offsets == NULL) | |
620 | { | |
621 | size_t size; | |
622 | unsigned int i; | |
623 | Elf_Internal_Shdr *symtab_hdr = &((elf_tdata (abfd))->symtab_hdr); | |
624 | ||
625 | size = symtab_hdr->sh_info * sizeof (bfd_vma); | |
626 | local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size); | |
627 | if (local_got_offsets == NULL) | |
628 | return FALSE; | |
629 | elf_local_got_offsets (abfd) = local_got_offsets; | |
630 | for (i = 0; i < symtab_hdr->sh_info; i++) | |
631 | local_got_offsets[i] = (bfd_vma) - 1; | |
632 | } | |
633 | ||
634 | return local_got_offsets; | |
635 | } | |
636 | ||
637 | ||
638 | /* Relocate an arc ELF section. | |
639 | Function : elf_arc_relocate_section | |
640 | Brief : Relocate an arc section, by handling all the relocations | |
641 | appearing in that section. | |
642 | Args : output_bfd : The bfd being written to. | |
643 | info : Link information. | |
644 | input_bfd : The input bfd. | |
645 | input_section : The section being relocated. | |
646 | contents : contents of the section being relocated. | |
647 | relocs : List of relocations in the section. | |
648 | local_syms : is a pointer to the swapped in local symbols. | |
649 | local_section : is an array giving the section in the input file | |
650 | corresponding to the st_shndx field of each | |
651 | local symbol. */ | |
652 | static bfd_boolean | |
653 | elf_arc_relocate_section (bfd * output_bfd, | |
654 | struct bfd_link_info * info, | |
655 | bfd * input_bfd, | |
656 | asection * input_section, | |
657 | bfd_byte * contents, | |
658 | Elf_Internal_Rela * relocs, | |
659 | Elf_Internal_Sym * local_syms, | |
660 | asection ** local_sections) | |
661 | { | |
662 | Elf_Internal_Shdr * symtab_hdr; | |
663 | struct elf_link_hash_entry ** sym_hashes; | |
664 | bfd_vma * local_got_offsets; | |
665 | Elf_Internal_Rela * rel; | |
666 | Elf_Internal_Rela * relend; | |
667 | ||
668 | symtab_hdr = &((elf_tdata (input_bfd))->symtab_hdr); | |
669 | sym_hashes = elf_sym_hashes (input_bfd); | |
670 | ||
671 | rel = relocs; | |
672 | relend = relocs + input_section->reloc_count; | |
673 | for (; rel < relend; rel++) | |
674 | { | |
675 | enum elf_arc_reloc_type r_type; | |
676 | reloc_howto_type * howto; | |
677 | unsigned long r_symndx; | |
678 | struct elf_link_hash_entry * h; | |
679 | Elf_Internal_Sym * sym; | |
680 | asection * sec; | |
681 | ||
682 | struct arc_relocation_data reloc_data = | |
683 | { | |
684 | .reloc_offset = 0, /* bfd_vma reloc_offset; */ | |
685 | .reloc_addend = 0, /* bfd_vma reloc_addend; */ | |
686 | .got_offset_value = 0, /* bfd_vma got_offset_value; */ | |
687 | .sym_value = 0, /* bfd_vma sym_value; */ | |
688 | .sym_section = NULL, /* asection *sym_section; */ | |
689 | .howto = NULL, /* reloc_howto_type *howto; */ | |
690 | .input_section = NULL, /* asection *input_section; */ | |
691 | .sdata_begin_symbol_vma = 0, /* bfd_vma sdata_begin_symbol_vma; */ | |
692 | .sdata_begin_symbol_vma_set = FALSE, /* bfd_vma sdata_begin_symbol_vma_set; */ | |
693 | .got_symbol_vma = 0, /* bfd_vma got_symbol_vma; */ | |
694 | .should_relocate = FALSE /* bfd_boolean should_relocate; */ | |
695 | }; | |
696 | ||
697 | struct elf_link_hash_entry *h2; | |
698 | ||
699 | h2 = elf_link_hash_lookup (elf_hash_table (info), "__SDATA_BEGIN__", | |
700 | FALSE, FALSE, TRUE); | |
701 | ||
702 | if (reloc_data.sdata_begin_symbol_vma_set == FALSE | |
703 | && h2 != NULL && h2->root.type != bfd_link_hash_undefined) | |
704 | { | |
705 | reloc_data.sdata_begin_symbol_vma = | |
706 | (h2->root.u.def.value + | |
707 | h2->root.u.def.section->output_section->vma); | |
708 | reloc_data.sdata_begin_symbol_vma_set = TRUE; | |
709 | } | |
710 | ||
711 | h2 = elf_link_hash_lookup (elf_hash_table (info), | |
712 | "_GLOBAL_OFFSET_TABLE_", FALSE, FALSE, | |
713 | TRUE); | |
714 | if (h2 != NULL && h2->root.type != bfd_link_hash_undefined) | |
715 | { | |
716 | reloc_data.got_symbol_vma = | |
717 | (h2->root.u.def.value + | |
718 | h2->root.u.def.section->output_section->vma); | |
719 | } | |
720 | ||
721 | r_type = ELF32_R_TYPE (rel->r_info); | |
722 | ||
723 | if (r_type >= (int) R_ARC_max) | |
724 | { | |
725 | bfd_set_error (bfd_error_bad_value); | |
726 | return FALSE; | |
727 | } | |
728 | howto = &elf_arc_howto_table[r_type]; | |
729 | ||
730 | reloc_data.input_section = input_section; | |
731 | reloc_data.howto = howto; | |
732 | reloc_data.reloc_offset = rel->r_offset; | |
733 | reloc_data.reloc_addend = rel->r_addend; | |
734 | ||
735 | r_symndx = ELF32_R_SYM (rel->r_info); | |
736 | ||
737 | /* This is a final link. */ | |
738 | h = NULL; | |
739 | sym = NULL; | |
740 | sec = NULL; | |
741 | ||
742 | if (r_symndx < symtab_hdr->sh_info) /* A local symbol. */ | |
743 | { | |
744 | sym = local_syms + r_symndx; | |
745 | sec = local_sections[r_symndx]; | |
746 | ||
747 | reloc_data.sym_value = sym->st_value; | |
748 | reloc_data.sym_section = sec; | |
749 | ||
750 | if (is_reloc_for_GOT (reloc_data.howto)) | |
751 | { | |
752 | local_got_offsets = arc_get_local_got_offsets (output_bfd); | |
753 | reloc_data.got_offset_value = local_got_offsets[r_symndx]; | |
754 | } | |
755 | ||
756 | reloc_data.should_relocate = TRUE; | |
757 | } | |
758 | else /* Global symbol. */ | |
759 | { | |
760 | /* Get the symbol's entry in the symtab. */ | |
761 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
762 | ||
763 | while (h->root.type == bfd_link_hash_indirect | |
764 | || h->root.type == bfd_link_hash_warning) | |
765 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
766 | ||
767 | BFD_ASSERT ((h->dynindx == -1) >= (h->forced_local != 0)); | |
768 | /* If we have encountered a definition for this symbol. */ | |
769 | if (h->root.type == bfd_link_hash_defined | |
770 | || h->root.type == bfd_link_hash_defweak) | |
771 | { | |
772 | reloc_data.sym_value = h->root.u.def.value; | |
773 | reloc_data.sym_section = h->root.u.def.section; | |
774 | ||
775 | reloc_data.should_relocate = TRUE; | |
776 | ||
777 | if (is_reloc_for_GOT (howto)) | |
778 | { | |
779 | struct dynamic_sections ds = | |
780 | arc_create_dynamic_sections (output_bfd, info); | |
781 | ||
782 | /* TODO: Change it to use arc_do_relocation with ARC_32 | |
783 | reloc. */ | |
784 | bfd_vma relocation = | |
785 | reloc_data.sym_value + reloc_data.reloc_addend | |
786 | + reloc_data.sym_section->output_offset | |
787 | + reloc_data.sym_section->output_section->vma; | |
788 | ||
789 | bfd_put_32 (output_bfd, relocation, ds.sgot->contents + h->got.offset); | |
790 | ||
791 | } | |
792 | } | |
793 | else if (h->root.type == bfd_link_hash_undefweak) | |
794 | { | |
795 | /* Is weak symbol and has no definition. */ | |
796 | continue; | |
797 | } | |
798 | else | |
799 | { | |
800 | if (is_reloc_for_GOT (howto)) | |
801 | { | |
802 | struct dynamic_sections ds = | |
803 | arc_create_dynamic_sections (output_bfd, info); | |
804 | ||
805 | reloc_data.sym_value = h->root.u.def.value; | |
806 | reloc_data.sym_section = ds.sgot; | |
807 | ||
808 | reloc_data.should_relocate = TRUE; | |
809 | } | |
810 | else if (is_reloc_for_PLT (howto)) | |
811 | { | |
812 | struct dynamic_sections ds = | |
813 | arc_create_dynamic_sections (output_bfd, info); | |
814 | ||
815 | reloc_data.sym_value = h->plt.offset; | |
816 | reloc_data.sym_section = ds.splt; | |
817 | ||
818 | reloc_data.should_relocate = TRUE; | |
819 | } | |
820 | else if (!(*info->callbacks->undefined_symbol) | |
821 | (info, h->root.root.string, input_bfd, input_section, | |
822 | rel->r_offset,!bfd_link_pic (info))) | |
823 | { | |
824 | return FALSE; | |
825 | } | |
826 | } | |
827 | ||
828 | reloc_data.got_offset_value = h->got.offset; | |
829 | } | |
830 | ||
831 | if (is_reloc_SDA_relative (howto) && reloc_data.sdata_begin_symbol_vma_set == FALSE) | |
832 | { | |
833 | (*_bfd_error_handler) | |
834 | ("Error: Linker symbol __SDATA_BEGIN__ not found"); | |
835 | bfd_set_error (bfd_error_bad_value); | |
836 | return FALSE; | |
837 | } | |
838 | ||
839 | DEBUG_ARC_RELOC (reloc_data); | |
840 | if (arc_do_relocation (contents, reloc_data) != bfd_reloc_ok) | |
841 | return FALSE; | |
842 | } | |
843 | ||
844 | return TRUE; | |
845 | } | |
846 | ||
847 | static struct dynamic_sections | |
848 | arc_create_dynamic_sections (bfd * abfd, struct bfd_link_info *info) | |
849 | { | |
850 | static bfd * dynobj = NULL; | |
851 | struct dynamic_sections ds = | |
852 | { | |
853 | .initialized = FALSE, | |
854 | .sgot = NULL, | |
855 | .srelgot = NULL, | |
856 | .sgotplt = NULL, | |
857 | .sdyn = NULL, | |
858 | .splt = NULL, | |
859 | .srelplt = NULL | |
860 | }; | |
861 | ||
862 | if (dynobj == NULL) | |
863 | { | |
864 | elf_hash_table (info)->dynobj = dynobj = abfd; | |
865 | if (!_bfd_elf_create_got_section (dynobj, info)) | |
866 | return ds; | |
867 | } | |
868 | else | |
869 | dynobj = (elf_hash_table (info))->dynobj; | |
870 | ||
871 | ds.sgot = bfd_get_section_by_name (dynobj, ".got"); | |
872 | ||
873 | ds.srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
874 | if (ds.srelgot == NULL) | |
875 | { | |
876 | ds.srelgot = bfd_make_section_with_flags (dynobj, ".rela.got", | |
877 | SEC_ALLOC | |
878 | | SEC_LOAD | |
879 | | SEC_HAS_CONTENTS | |
880 | | SEC_IN_MEMORY | |
881 | | SEC_LINKER_CREATED | |
882 | | SEC_READONLY); | |
883 | if (ds.srelgot == NULL | |
884 | || !bfd_set_section_alignment (dynobj, ds.srelgot, 2)) | |
885 | return ds; | |
886 | } | |
887 | ||
888 | ds.sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); | |
889 | ||
890 | ds.sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
891 | ds.splt = bfd_get_section_by_name (dynobj, ".plt"); | |
892 | ds.srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
893 | ||
894 | ds.initialized = TRUE; | |
895 | ||
896 | return ds; | |
897 | } | |
898 | ||
899 | #define ADD_SYMBOL_REF_SEC_AND_RELOC(SECNAME, COND_FOR_RELOC, H) \ | |
900 | ds.s##SECNAME->size; \ | |
901 | { \ | |
902 | if (COND_FOR_RELOC) ds.srel##SECNAME->size += sizeof (Elf32_External_Rela); \ | |
903 | if (H) \ | |
904 | if (h->dynindx == -1 && !h->forced_local) \ | |
905 | if (! bfd_elf_link_record_dynamic_symbol (info, H)) \ | |
906 | return FALSE; \ | |
907 | ds.s##SECNAME->size += 4; \ | |
908 | } | |
909 | ||
910 | static bfd_boolean | |
911 | elf_arc_check_relocs (bfd * abfd, | |
912 | struct bfd_link_info * info, | |
913 | asection * sec, | |
914 | const Elf_Internal_Rela * relocs) | |
915 | { | |
916 | Elf_Internal_Shdr * symtab_hdr; | |
917 | struct elf_link_hash_entry ** sym_hashes; | |
918 | bfd_vma * local_got_offsets; | |
919 | const Elf_Internal_Rela * rel; | |
920 | const Elf_Internal_Rela * rel_end; | |
921 | bfd * dynobj ATTRIBUTE_UNUSED; | |
922 | ||
923 | dynobj = (elf_hash_table (info))->dynobj; | |
924 | symtab_hdr = &((elf_tdata (abfd))->symtab_hdr); | |
925 | sym_hashes = elf_sym_hashes (abfd); | |
926 | local_got_offsets = arc_get_local_got_offsets (abfd); | |
927 | ||
928 | struct dynamic_sections ds = arc_create_dynamic_sections (abfd, info); | |
929 | ||
930 | rel_end = relocs + sec->reloc_count; | |
931 | for (rel = relocs; rel < rel_end; rel++) | |
932 | { | |
933 | enum elf_arc_reloc_type r_type; | |
934 | reloc_howto_type *howto; | |
935 | unsigned long r_symndx; | |
936 | struct elf_link_hash_entry *h; | |
937 | ||
938 | r_type = ELF32_R_TYPE (rel->r_info); | |
939 | ||
940 | if (r_type >= (int) R_ARC_max) | |
941 | { | |
942 | bfd_set_error (bfd_error_bad_value); | |
943 | return FALSE; | |
944 | } | |
945 | howto = &elf_arc_howto_table[r_type]; | |
946 | ||
947 | /* Load symbol information. */ | |
948 | r_symndx = ELF32_R_SYM (rel->r_info); | |
949 | if (r_symndx < symtab_hdr->sh_info) /* Is a local symbol. */ | |
950 | h = NULL; | |
951 | else /* Global one. */ | |
952 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
953 | ||
954 | if (is_reloc_for_PLT (howto) == TRUE) | |
955 | { | |
956 | if (h == NULL) | |
957 | continue; | |
958 | else | |
959 | h->needs_plt = 1; | |
960 | } | |
961 | ||
962 | if (is_reloc_for_GOT (howto) == TRUE) | |
963 | { | |
964 | if (h == NULL) | |
965 | { | |
966 | /* Local symbol. */ | |
967 | local_got_offsets[r_symndx] = | |
968 | ADD_SYMBOL_REF_SEC_AND_RELOC (got, bfd_link_pic (info), NULL); | |
969 | } | |
970 | else | |
971 | { | |
972 | /* Global symbol. */ | |
973 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
974 | h->got.offset = | |
975 | ADD_SYMBOL_REF_SEC_AND_RELOC (got, TRUE, h); | |
976 | } | |
977 | } | |
978 | } | |
979 | ||
980 | return TRUE; | |
981 | } | |
982 | ||
983 | #define ELF_DYNAMIC_INTERPRETER "/sbin/ld-uClibc.so" | |
984 | ||
985 | /* Size of one plt entry in bytes. */ | |
986 | #define PLT_ENTRY_SIZE 12 | |
987 | #define PLT_ENTRY_SIZE_V2 16 | |
988 | ||
989 | /* Instructions appear in memory as a sequence of half-words (16 bit); | |
990 | individual half-words are represented on the target in target byte order. | |
991 | We use 'unsigned short' on the host to represent the PLT templates, | |
992 | and translate to target byte order as we copy to the target. */ | |
993 | typedef unsigned short insn_hword; | |
994 | ||
995 | ||
996 | /* TODO: Make this PLT entry code be in a separate object file. */ | |
997 | /* TODO: This is a linker BTW, we should be able to link. :) */ | |
998 | ||
999 | /* The zeroth entry in the absolute plt entry. */ | |
1000 | static const insn_hword elf_arc_abs_plt0_entry[2 * PLT_ENTRY_SIZE / 2] = | |
1001 | { | |
1002 | 0x1600, /* ld %r11, [0] */ | |
1003 | 0x700b, | |
1004 | 0x0000, | |
1005 | 0x0000, | |
1006 | 0x1600, /* ld %r10, [0] */ | |
1007 | 0x700a, /* */ | |
1008 | 0, | |
1009 | 0, | |
1010 | 0x2020, /* j [%r10] */ | |
1011 | 0x0280, /* ---"---- */ | |
1012 | 0x0000, /* pad */ | |
1013 | 0x0000 /* pad */ | |
1014 | }; | |
1015 | ||
1016 | /* Contents of the subsequent entries in the absolute plt. */ | |
1017 | static const insn_hword elf_arc_abs_pltn_entry[PLT_ENTRY_SIZE / 2] = | |
1018 | { | |
1019 | 0x2730, /* ld %r12, [%pc,func@gotpc] */ | |
1020 | 0x7f8c, /* ------ " " -------------- */ | |
1021 | 0x0000, /* ------ " " -------------- */ | |
1022 | 0x0000, /* ------ " " -------------- */ | |
1023 | 0x7c20, /* j_s.d [%r12] */ | |
1024 | 0x74ef /* mov_s %r12, %pcl */ | |
1025 | }; | |
1026 | ||
1027 | /* The zeroth entry in the absolute plt entry for ARCv2. */ | |
1028 | static const insn_hword elf_arcV2_abs_plt0_entry[2 * PLT_ENTRY_SIZE_V2 / 2] = | |
1029 | { | |
1030 | 0x1600, 0x700b, 0, 0, /* ld %r11, [0] */ | |
1031 | 0x1600, 0x700a, 0, 0, /* ld %r10, [0] */ | |
1032 | 0x2020, 0x0280, /* j [%r10] */ | |
1033 | 0x0000, 0x0000, /* -> RELOCATED TO ABS ADDRESS OF GOT <- */ | |
1034 | 0x0000, /* pad */ | |
1035 | 0x0000, /* pad */ | |
1036 | 0x0000, /* pad */ | |
1037 | 0x0000 /* pad */ | |
1038 | }; | |
1039 | ||
1040 | /* Contents of the subsequent entries in the absolute plt for ARCv2. */ | |
1041 | static const insn_hword elf_arcV2_abs_pltn_entry[PLT_ENTRY_SIZE_V2 / 2] = | |
1042 | { | |
1043 | 0x2730, /* ld %r12, [%pcl,func@gotpc] */ | |
1044 | 0x7f8c, /* ------ " " -------------- */ | |
1045 | 0x0000, /* ------ " " -------------- */ | |
1046 | 0x0000, /* ------ " " -------------- */ | |
1047 | 0x2021, /* j.d [%r12] */ | |
1048 | 0x0300, /* ------ " " -------------- */ | |
1049 | 0x240a, /* mov %r12, %pcl */ | |
1050 | 0x1fc0 /* ------ " " -------------- */ | |
1051 | }; | |
1052 | ||
1053 | /* The zeroth entry in the pic plt entry. */ | |
1054 | static const insn_hword elf_arc_pic_plt0_entry[2 * PLT_ENTRY_SIZE / 2] = | |
1055 | { | |
1056 | 0x2730, /* ld %r11, [pcl,0] : 0 to be replaced by | |
1057 | _DYNAMIC@GOTPC+4 */ | |
1058 | 0x7f8b, | |
1059 | 0x0000, | |
1060 | 0x0000, | |
1061 | 0x2730, /* ld %r10, [pcl,0] : 0 to be replaced by | |
1062 | -DYNAMIC@GOTPC+8 */ | |
1063 | 0x7f8a, /* */ | |
1064 | 0, | |
1065 | 0, | |
1066 | 0x2020, /* j [%r10] */ | |
1067 | 0x0280, /* ---"---- */ | |
1068 | 0x0000, /* pad */ | |
1069 | 0x0000 /* pad */ | |
1070 | }; | |
1071 | ||
1072 | /* Contents of the subsequent entries in the pic plt. */ | |
1073 | static const insn_hword elf_arc_pic_pltn_entry[PLT_ENTRY_SIZE / 2] = | |
1074 | { | |
1075 | 0x2730, /* ld %r12, [%pc,func@got] */ | |
1076 | 0x7f8c, /* ------ " " -------------- */ | |
1077 | 0x0000, /* ------ " " -------------- */ | |
1078 | 0x0000, /* ------ " " -------------- */ | |
1079 | 0x7c20, /* j_s.d [%r12] */ | |
1080 | 0x74ef, /* mov_s %r12, %pcl */ | |
1081 | }; | |
1082 | ||
1083 | /* The zeroth entry in the pic plt entry for ARCv2. */ | |
1084 | static const insn_hword elf_arcV2_pic_plt0_entry[2 * PLT_ENTRY_SIZE_V2 / 2] = | |
1085 | { | |
1086 | 0x2730, /* ld %r11, [pcl,0] : 0 to be replaced by | |
1087 | _DYNAMIC@GOTPC+4 */ | |
1088 | 0x7f8b, | |
1089 | 0x0000, | |
1090 | 0x0000, | |
1091 | 0x2730, /* ld %r10, [pcl,0] : 0 to be replaced by | |
1092 | -DYNAMIC@GOTPC+8 */ | |
1093 | 0x7f8a, /* */ | |
1094 | 0, | |
1095 | 0, | |
1096 | 0x2020, /* j [%r10] */ | |
1097 | 0x0280, /* ---"---- */ | |
1098 | 0x0000, /* pad */ | |
1099 | 0x0000, /* pad */ | |
1100 | 0x0000, /* pad */ | |
1101 | 0x0000, /* pad */ | |
1102 | 0x0000, /* pad */ | |
1103 | 0x0000 /* pad */ | |
1104 | }; | |
1105 | ||
1106 | #define elf_arcV2_pic_PLT0_ENTRY_SIZE (2 * PLT_ENTRY_SIZE_V2/2) | |
1107 | ||
1108 | /* Contents of the subsequent entries in the pic plt for ARCv2. */ | |
1109 | static const insn_hword elf_arcV2_pic_pltn_entry[PLT_ENTRY_SIZE_V2 / 2] = | |
1110 | { | |
1111 | 0x2730, /* ld %r12, [%pc,func@got] */ | |
1112 | 0x7f8c, /* ------ " " -------------- */ | |
1113 | 0x0000, /* ------ " " -------------- */ | |
1114 | 0x0000, /* ------ " " -------------- */ | |
1115 | 0x2021, /* j.d [%r12] */ | |
1116 | 0x0300, /* ------ " " -------------- */ | |
1117 | 0x240a, /* mov %r12, %pcl */ | |
1118 | 0x1fc0 /* ------ " " -------------- */ | |
1119 | }; | |
1120 | ||
1121 | #define elf_arcV2_pic_PLTN_ENTRY_SIZE (PLT_ENTRY_SIZE_V2/2) | |
1122 | ||
1123 | enum plt_reloc_symbol | |
1124 | { | |
1125 | LAST_RELOC = 0, | |
1126 | ||
1127 | SGOT = 1, | |
1128 | ||
1129 | RELATIVE = (1 << 8), | |
1130 | MIDDLE_ENDIAN = (1 << 9) | |
1131 | }; | |
1132 | ||
1133 | #define IS_RELATIVE(S) ((S & RELATIVE) != 0) | |
1134 | #define IS_MIDDLE_ENDIAN(S) ((S & MIDDLE_ENDIAN) != 0) | |
1135 | #define SYM_ONLY(S) (S & 0xFF) | |
1136 | ||
1137 | struct plt_reloc | |
1138 | { | |
1139 | bfd_vma offset; | |
1140 | bfd_vma size; | |
1141 | bfd_vma mask; | |
1142 | enum plt_reloc_symbol symbol; | |
1143 | bfd_vma addend; | |
1144 | }; | |
1145 | ||
1146 | struct plt_version_t | |
1147 | { | |
1148 | const insn_hword * entry; | |
1149 | const bfd_vma entry_size; | |
1150 | const insn_hword * elem; | |
1151 | const bfd_vma elem_size; | |
1152 | ||
1153 | struct plt_reloc entry_relocs[5]; | |
1154 | struct plt_reloc elem_relocs[5]; | |
1155 | }; | |
1156 | ||
1157 | ||
1158 | #define PLT_DATA(NAME, ...) \ | |
1159 | .entry = NAME##_plt0_entry, \ | |
1160 | .entry_size = NAME##_PLT0_ENTRY_SIZE, \ | |
1161 | .elem = NAME##_pltn_entry, \ | |
1162 | .elem_size = NAME##_PLTN_ENTRY_SIZE | |
1163 | ||
1164 | struct plt_version_t plt_versions[] = | |
1165 | { | |
1166 | { | |
1167 | PLT_DATA (elf_arcV2_pic), | |
1168 | .entry_relocs = | |
1169 | { | |
1170 | {4, 32, 0xFFFFFFFF, SGOT | RELATIVE | MIDDLE_ENDIAN, 4}, | |
1171 | {12, 32, 0xFFFFFFFF, SGOT | RELATIVE | MIDDLE_ENDIAN, 8}, | |
1172 | {20, 32, 0xFFFFFFFF, SGOT, 0}, | |
1173 | {0, 0, 0, LAST_RELOC, 0} | |
1174 | }, | |
1175 | .elem_relocs = | |
1176 | { | |
1177 | {4, 32, 0xFFFFFFFF, SGOT, 0}, | |
1178 | {0, 0, 0, LAST_RELOC, 0} | |
1179 | } | |
1180 | } | |
1181 | }; | |
1182 | #undef PLT_DATA | |
1183 | ||
1184 | static struct plt_version_t * | |
1185 | arc_get_plt_version (void) | |
1186 | { | |
1187 | return &(plt_versions[0]); | |
1188 | } | |
1189 | ||
1190 | static bfd_vma | |
1191 | add_symbol_to_plt (struct bfd_link_info *info) | |
1192 | { | |
1193 | bfd *dynobj = (elf_hash_table (info))->dynobj; | |
1194 | struct dynamic_sections ds = arc_create_dynamic_sections (dynobj, info); | |
1195 | bfd_vma ret; | |
1196 | ||
1197 | /* If this is the first .plt entry, make room for the special first entry. */ | |
1198 | if (ds.splt->size == 0) | |
1199 | ds.splt->size += 2 * | |
1200 | (bfd_get_mach (dynobj) == bfd_mach_arc_arcv2 | |
1201 | ? PLT_ENTRY_SIZE_V2 : PLT_ENTRY_SIZE); | |
1202 | ||
1203 | ret = ds.splt->size; | |
1204 | ||
1205 | ds.splt->size += (bfd_get_mach (dynobj) == bfd_mach_arc_arcv2 | |
1206 | ? PLT_ENTRY_SIZE_V2 | |
1207 | : PLT_ENTRY_SIZE | |
1208 | ); | |
1209 | ds.sgotplt->size += 4; | |
1210 | ds.srelplt->size += sizeof (Elf32_External_Rela); | |
1211 | ||
1212 | return ret; | |
1213 | } | |
1214 | ||
1215 | #define PLT_DO_RELOCS_FOR_ENTRY(DS, RELOCS) \ | |
1216 | plt_do_relocs_for_symbol (DS, RELOCS, 0, 0) | |
1217 | ||
1218 | static void | |
1219 | plt_do_relocs_for_symbol (struct dynamic_sections *ds, | |
1220 | struct plt_reloc *reloc, | |
1221 | bfd_vma plt_offset, | |
1222 | bfd_vma symbol_got_offset) | |
1223 | { | |
1224 | while (SYM_ONLY (reloc->symbol) != LAST_RELOC) | |
1225 | { | |
1226 | bfd_vma relocation = 0; | |
1227 | ||
1228 | switch (SYM_ONLY (reloc->symbol)) | |
1229 | { | |
1230 | case SGOT: | |
1231 | relocation = | |
1232 | ds->sgotplt->output_section->vma + | |
1233 | ds->sgotplt->output_offset + symbol_got_offset; | |
1234 | break; | |
1235 | } | |
1236 | relocation += reloc->addend; | |
1237 | ||
1238 | relocation -= (IS_RELATIVE (reloc->symbol)) | |
1239 | ? ds->splt->output_section->vma + ds->splt->output_offset + | |
1240 | plt_offset + reloc->offset : 0; | |
1241 | ||
1242 | if (IS_MIDDLE_ENDIAN (reloc->symbol)) | |
1243 | { | |
1244 | relocation = | |
1245 | ((relocation & 0xffff0000) >> 16) | | |
1246 | ((relocation & 0xffff) << 16); | |
1247 | } | |
1248 | ||
1249 | switch (reloc->size) | |
1250 | { | |
1251 | case 32: | |
1252 | bfd_put_32 (ds->splt->output_section->owner, | |
1253 | relocation, | |
1254 | ds->splt->contents + plt_offset + reloc->offset); | |
1255 | break; | |
1256 | } | |
1257 | ||
1258 | reloc = &(reloc[1]); /* Jump to next relocation. */ | |
1259 | } | |
1260 | } | |
1261 | ||
1262 | static void | |
1263 | relocate_plt_for_symbol (struct bfd_link_info *info, | |
1264 | struct elf_link_hash_entry *h) | |
1265 | { | |
1266 | bfd * dynobj = elf_hash_table (info)->dynobj; | |
1267 | struct plt_version_t *plt_data = arc_get_plt_version (); | |
1268 | struct dynamic_sections ds = arc_create_dynamic_sections (dynobj, info); | |
1269 | ||
1270 | bfd_vma plt_index = h->plt.offset / plt_data->elem_size; | |
1271 | bfd_vma got_offset = (plt_index + 3) * 4; | |
1272 | ||
1273 | memcpy (ds.splt->contents + h->plt.offset, plt_data->elem, | |
1274 | plt_data->elem_size * sizeof (insn_hword)); | |
1275 | plt_do_relocs_for_symbol (&ds, plt_data->elem_relocs, h->plt.offset, | |
1276 | got_offset); | |
1277 | } | |
1278 | ||
1279 | static void | |
1280 | relocate_plt_for_entry (struct bfd_link_info *info) | |
1281 | { | |
1282 | bfd * dynobj = (elf_hash_table (info))->dynobj; | |
1283 | struct plt_version_t *plt_data = arc_get_plt_version (); | |
1284 | struct dynamic_sections ds = arc_create_dynamic_sections (dynobj, info); | |
1285 | ||
1286 | memcpy (ds.splt->contents, plt_data->entry, | |
1287 | plt_data->entry_size * sizeof (insn_hword)); | |
1288 | PLT_DO_RELOCS_FOR_ENTRY (&ds, plt_data->entry_relocs); | |
1289 | } | |
1290 | ||
1291 | ||
1292 | /* Desc : Adjust a symbol defined by a dynamic object and referenced by a | |
1293 | regular object. The current definition is in some section of the | |
1294 | dynamic object, but we're not including those sections. We have to | |
1295 | change the definition to something the rest of the link can | |
1296 | understand. */ | |
1297 | ||
1298 | static bfd_boolean | |
1299 | elf_arc_adjust_dynamic_symbol (struct bfd_link_info *info, | |
1300 | struct elf_link_hash_entry *h) | |
1301 | { | |
1302 | bfd *dynobj = (elf_hash_table (info))->dynobj; | |
1303 | struct dynamic_sections ds = arc_create_dynamic_sections (dynobj, info); | |
1304 | ||
1305 | if (h->needs_plt == 1) | |
1306 | { | |
1307 | if (!bfd_link_pic (info) && !h->def_dynamic && !h->ref_dynamic) | |
1308 | { | |
1309 | /* This case can occur if we saw a PLT32 reloc in an input | |
1310 | file, but the symbol was never referred to by a dynamic | |
1311 | object. In such a case, we don't actually need to build | |
1312 | a procedure linkage table, and we can just do a PC32 | |
1313 | reloc instead. */ | |
1314 | BFD_ASSERT (h->needs_plt); | |
1315 | return TRUE; | |
1316 | } | |
1317 | ||
1318 | /* Make sure this symbol is output as a dynamic symbol. */ | |
1319 | if (h->dynindx == -1 && !h->forced_local | |
1320 | && !bfd_elf_link_record_dynamic_symbol (info, h)) | |
1321 | return FALSE; | |
1322 | ||
1323 | if (bfd_link_pic (info) || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
1324 | { | |
1325 | bfd_vma loc = add_symbol_to_plt (info); | |
1326 | ||
1327 | if (!bfd_link_pic (info) && !h->def_regular) | |
1328 | { | |
1329 | h->root.u.def.section = ds.splt; | |
1330 | h->root.u.def.value = loc; | |
1331 | } | |
1332 | h->plt.offset = loc; | |
1333 | } | |
1334 | } | |
1335 | else | |
1336 | { | |
1337 | h->plt.offset = (bfd_vma) - 1; | |
1338 | h->needs_plt = 0; | |
1339 | } | |
1340 | ||
1341 | return TRUE; | |
1342 | } | |
1343 | ||
1344 | #define ADD_RELA(BFD, SECTION, OFFSET, SYM_IDX, TYPE, ADDEND) \ | |
1345 | {\ | |
1346 | struct dynamic_sections ds = arc_create_dynamic_sections (output_bfd, info); \ | |
1347 | bfd_byte * rloc = ds.srel##SECTION->contents + \ | |
1348 | ((ds.srel##SECTION->reloc_count++) * sizeof (Elf32_External_Rela)); \ | |
1349 | Elf_Internal_Rela rel; \ | |
1350 | bfd_put_32 (output_bfd, (bfd_vma) 0, ds.s##SECTION->contents + OFFSET); \ | |
1351 | rel.r_addend = ADDEND; \ | |
1352 | rel.r_offset = (ds.s##SECTION)->output_section->vma + (ds.s##SECTION)->output_offset + OFFSET; \ | |
1353 | rel.r_info = ELF32_R_INFO (SYM_IDX, TYPE); \ | |
1354 | bfd_elf32_swap_reloca_out (BFD, &rel, rloc); \ | |
1355 | } | |
1356 | ||
1357 | /* Function : elf_arc_finish_dynamic_symbol | |
1358 | Brief : Finish up dynamic symbol handling. We set the | |
1359 | contents of various dynamic sections here. | |
1360 | Args : output_bfd : | |
1361 | info : | |
1362 | h : | |
1363 | sym : | |
1364 | Returns : True/False as the return status. */ | |
1365 | static bfd_boolean | |
1366 | elf_arc_finish_dynamic_symbol (bfd * output_bfd, | |
1367 | struct bfd_link_info *info, | |
1368 | struct elf_link_hash_entry *h, | |
1369 | Elf_Internal_Sym * sym) | |
1370 | { | |
1371 | if (h->plt.offset != (bfd_vma) - 1) | |
1372 | relocate_plt_for_symbol (info, h); | |
1373 | ||
1374 | if (h->got.offset != (bfd_vma) - 1) | |
1375 | { | |
1376 | if (bfd_link_pic (info) && (info->symbolic || h->dynindx == -1) | |
1377 | && h->def_regular) | |
1378 | { | |
1379 | ADD_RELA (output_bfd, got, h->got.offset, 0, R_ARC_RELATIVE, 0); | |
1380 | } | |
1381 | else | |
1382 | { | |
1383 | ADD_RELA (output_bfd, got, h->got.offset, h->dynindx, | |
1384 | R_ARC_GLOB_DAT, 0); | |
1385 | } | |
1386 | } | |
1387 | ||
1388 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
1389 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
1390 | || strcmp (h->root.root.string, "__DYNAMIC") == 0 | |
1391 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
1392 | sym->st_shndx = SHN_ABS; | |
1393 | ||
1394 | return TRUE; | |
1395 | } | |
1396 | ||
1397 | #define GET_SYMBOL_OR_SECTION(TAG, SYMBOL, SECTION) \ | |
1398 | case TAG: \ | |
1399 | if (SYMBOL != NULL) \ | |
1400 | { \ | |
1401 | h = elf_link_hash_lookup (elf_hash_table (info), SYMBOL, FALSE, FALSE, TRUE); \ | |
1402 | } \ | |
1403 | else if (SECTION != NULL) \ | |
1404 | { \ | |
1405 | s = bfd_get_section_by_name (output_bfd, SECTION); \ | |
1406 | BFD_ASSERT (s != NULL); \ | |
1407 | do_it = TRUE; \ | |
1408 | } \ | |
1409 | break; | |
1410 | ||
1411 | /* Function : elf_arc_finish_dynamic_sections | |
1412 | Brief : Finish up the dynamic sections handling. | |
1413 | Args : output_bfd : | |
1414 | info : | |
1415 | h : | |
1416 | sym : | |
1417 | Returns : True/False as the return status. */ | |
1418 | static bfd_boolean | |
1419 | elf_arc_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info *info) | |
1420 | { | |
1421 | struct dynamic_sections ds = arc_create_dynamic_sections (output_bfd, info); | |
1422 | bfd *dynobj = (elf_hash_table (info))->dynobj; | |
1423 | ||
1424 | if (ds.sdyn) | |
1425 | { | |
1426 | Elf32_External_Dyn *dyncon, *dynconend; | |
1427 | ||
1428 | dyncon = (Elf32_External_Dyn *) ds.sdyn->contents; | |
1429 | dynconend = | |
1430 | (Elf32_External_Dyn *) (ds.sdyn->contents + ds.sdyn->size); | |
1431 | for (; dyncon < dynconend; dyncon++) | |
1432 | { | |
1433 | Elf_Internal_Dyn internal_dyn; | |
1434 | bfd_boolean do_it = FALSE; | |
1435 | ||
1436 | struct elf_link_hash_entry *h = NULL; | |
1437 | asection *s = NULL; | |
1438 | ||
1439 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &internal_dyn); | |
1440 | ||
1441 | switch (internal_dyn.d_tag) | |
1442 | { | |
1443 | GET_SYMBOL_OR_SECTION (DT_INIT, "_init", NULL) | |
1444 | GET_SYMBOL_OR_SECTION (DT_FINI, "_fini", NULL) | |
1445 | GET_SYMBOL_OR_SECTION (DT_PLTGOT, NULL, ".plt") | |
1446 | GET_SYMBOL_OR_SECTION (DT_JMPREL, NULL, ".rela.plt") | |
1447 | GET_SYMBOL_OR_SECTION (DT_PLTRELSZ, NULL, ".rela.plt") | |
1448 | GET_SYMBOL_OR_SECTION (DT_RELASZ, NULL, ".rela.plt") | |
1449 | default: | |
1450 | break; | |
1451 | } | |
1452 | ||
1453 | /* In case the dynamic symbols should be updated with a | |
1454 | symbol. */ | |
1455 | if (h != NULL | |
1456 | && (h->root.type == bfd_link_hash_defined | |
1457 | || h->root.type == bfd_link_hash_defweak) | |
1458 | ) | |
1459 | { | |
1460 | asection *asec_ptr; | |
1461 | ||
1462 | internal_dyn.d_un.d_val = h->root.u.def.value; | |
1463 | asec_ptr = h->root.u.def.section; | |
1464 | if (asec_ptr->output_section != NULL) | |
1465 | { | |
1466 | internal_dyn.d_un.d_val += | |
1467 | (asec_ptr->output_section->vma + | |
1468 | asec_ptr->output_offset); | |
1469 | } | |
1470 | else | |
1471 | { | |
1472 | /* The symbol is imported from another | |
1473 | shared library and does not apply to this | |
1474 | one. */ | |
1475 | internal_dyn.d_un.d_val = 0; | |
1476 | } | |
1477 | do_it = TRUE; | |
1478 | } | |
1479 | else if (s != NULL) /* With a section information. */ | |
1480 | { | |
1481 | switch (internal_dyn.d_tag) | |
1482 | { | |
1483 | case DT_PLTGOT: | |
1484 | case DT_JMPREL: | |
1485 | internal_dyn.d_un.d_ptr = s->vma; | |
1486 | do_it = TRUE; | |
1487 | break; | |
1488 | ||
1489 | case DT_PLTRELSZ: | |
1490 | internal_dyn.d_un.d_val = s->size; | |
1491 | do_it = TRUE; | |
1492 | break; | |
1493 | ||
1494 | case DT_RELASZ: | |
1495 | internal_dyn.d_un.d_val -= s->size; | |
1496 | do_it = TRUE; | |
1497 | break; | |
1498 | ||
1499 | default: | |
1500 | break; | |
1501 | } | |
1502 | } | |
1503 | ||
1504 | if (do_it == TRUE) | |
1505 | bfd_elf32_swap_dyn_out (output_bfd, &internal_dyn, dyncon); | |
1506 | } | |
1507 | ||
1508 | if (ds.splt->size > 0) | |
1509 | { | |
1510 | relocate_plt_for_entry (info); | |
1511 | } | |
1512 | ||
1513 | elf_section_data (ds.srelplt->output_section)->this_hdr.sh_entsize = 0xc; | |
1514 | } | |
1515 | ||
1516 | /* Fill in the first three entries in the global offset table. */ | |
1517 | if (ds.sgot) | |
1518 | { | |
1519 | if (ds.sgot->size > 0) | |
1520 | { | |
1521 | if (ds.sdyn == NULL) | |
1522 | bfd_put_32 (output_bfd, (bfd_vma) 0, | |
1523 | ds.sgotplt->contents); | |
1524 | else | |
1525 | bfd_put_32 (output_bfd, | |
1526 | ds.sdyn->output_section->vma + ds.sdyn->output_offset, | |
1527 | ds.sgotplt->contents); | |
1528 | bfd_put_32 (output_bfd, (bfd_vma) 0, ds.sgotplt->contents + 4); | |
1529 | bfd_put_32 (output_bfd, (bfd_vma) 0, ds.sgotplt->contents + 8); | |
1530 | ||
1531 | elf_section_data (ds.sgot->output_section)->this_hdr.sh_entsize = 4; | |
1532 | } | |
1533 | } | |
1534 | ||
1535 | if (ds.srelgot | |
1536 | /* Check that the linker script has not dumped the .srelgot section. */ | |
1537 | && ds.srelgot->output_section | |
1538 | && elf_section_data (ds.srelgot->output_section)) | |
1539 | { | |
1540 | /* TODO: Make it work even if I remove this. */ | |
1541 | elf_section_data (ds.srelgot->output_section)->this_hdr.sh_entsize = 0xc; | |
1542 | } | |
1543 | ||
1544 | return TRUE; | |
1545 | } | |
1546 | ||
1547 | #define ADD_DYNAMIC_SYMBOL(NAME, TAG) \ | |
1548 | h = elf_link_hash_lookup (elf_hash_table (info), NAME, FALSE, FALSE, FALSE); \ | |
1549 | if ((h != NULL && (h->ref_regular || h->def_regular))) \ | |
1550 | if (! _bfd_elf_add_dynamic_entry (info, TAG, 0)) \ | |
1551 | return FALSE; | |
1552 | ||
1553 | /* Set the sizes of the dynamic sections. */ | |
1554 | static bfd_boolean | |
1555 | elf_arc_size_dynamic_sections (bfd * output_bfd, struct bfd_link_info *info) | |
1556 | { | |
1557 | bfd * dynobj; | |
1558 | asection * s; | |
1559 | bfd_boolean relocs_exist; | |
1560 | bfd_boolean reltext_exist; | |
1561 | struct dynamic_sections ds = arc_create_dynamic_sections (output_bfd, info); | |
1562 | ||
1563 | dynobj = (elf_hash_table (info))->dynobj; | |
1564 | BFD_ASSERT (dynobj != NULL); | |
1565 | ||
1566 | if ((elf_hash_table (info))->dynamic_sections_created) | |
1567 | { | |
1568 | struct elf_link_hash_entry *h; | |
1569 | ||
1570 | /* Set the contents of the .interp section to the interpreter. */ | |
1571 | if (!bfd_link_pic (info)) | |
1572 | { | |
1573 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
1574 | BFD_ASSERT (s != NULL); | |
1575 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; | |
1576 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
1577 | } | |
1578 | ||
1579 | /* Add some entries to the .dynamic section. We fill in some of the | |
1580 | values later, in elf_bfd_final_link, but we must add the entries | |
1581 | now so that we know the final size of the .dynamic section. | |
1582 | Checking if the .init section is present. We also create DT_INIT | |
1583 | and DT_FINI entries if the init_str has been changed by the user. */ | |
1584 | ||
1585 | ADD_DYNAMIC_SYMBOL ("init", DT_INIT); | |
1586 | ADD_DYNAMIC_SYMBOL ("fini", DT_FINI); | |
1587 | } | |
1588 | else | |
1589 | { | |
1590 | /* We may have created entries in the .rela.got section. However, if | |
1591 | we are not creating the dynamic sections, we will not actually | |
1592 | use these entries. Reset the size of .rela.got, which will cause | |
1593 | it to get stripped from the output file below. */ | |
1594 | ds.srelgot->size = 0; | |
1595 | } | |
1596 | ||
1597 | for (s = dynobj->sections; s != NULL; s = s->next) | |
1598 | { | |
1599 | bfd_boolean is_dynamic_section = FALSE; | |
1600 | ||
1601 | /* Skip any non dynamic section. */ | |
1602 | if (strstr (s->name, ".plt") != NULL | |
1603 | || strstr (s->name, ".got") != NULL | |
1604 | || strstr (s->name, ".rel") != NULL) | |
1605 | is_dynamic_section = TRUE; | |
1606 | ||
1607 | /* Allocate memory for the section contents. */ | |
1608 | if (!is_dynamic_section) | |
1609 | continue; | |
1610 | ||
1611 | s->contents = (bfd_byte *) bfd_alloc (dynobj, s->size); | |
1612 | if (s->contents == NULL && s->size != 0) | |
1613 | return FALSE; | |
1614 | ||
1615 | if (s->size == 0) | |
1616 | { | |
1617 | s->flags |= SEC_EXCLUDE; | |
1618 | continue; | |
1619 | } | |
1620 | ||
1621 | if (strcmp (s->name, ".rela.plt") != 0) | |
1622 | { | |
1623 | const char *outname = bfd_get_section_name (output_bfd, | |
1624 | s->output_section); | |
1625 | asection *target = bfd_get_section_by_name (output_bfd, | |
1626 | outname + 4); | |
1627 | ||
1628 | relocs_exist = TRUE; | |
1629 | if (target != NULL && target->size != 0 | |
1630 | && (target->flags & SEC_READONLY) != 0 | |
1631 | && (target->flags & SEC_ALLOC) != 0) | |
1632 | reltext_exist = TRUE; | |
1633 | } | |
1634 | } | |
1635 | ||
1636 | if (ds.sdyn) | |
1637 | { | |
1638 | if (ds.splt && ds.splt->size != 0) | |
1639 | if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0) | |
1640 | || !_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0) | |
1641 | || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_RELA) | |
1642 | || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0) | |
1643 | ) | |
1644 | return FALSE; | |
1645 | ||
1646 | if (relocs_exist == TRUE) | |
1647 | if (!_bfd_elf_add_dynamic_entry (info, DT_RELA, 0) | |
1648 | || !_bfd_elf_add_dynamic_entry (info, DT_RELASZ, 0) | |
1649 | || !_bfd_elf_add_dynamic_entry (info, DT_RELENT, | |
1650 | sizeof (Elf32_External_Rela)) | |
1651 | ) | |
1652 | return FALSE; | |
1653 | ||
1654 | if (reltext_exist == TRUE) | |
1655 | if (!_bfd_elf_add_dynamic_entry (info, DT_TEXTREL, 0)) | |
1656 | return FALSE; | |
1657 | } | |
1658 | ||
1659 | return TRUE; | |
1660 | } | |
1661 | ||
1662 | ||
6d00b590 | 1663 | #define TARGET_LITTLE_SYM arc_elf32_le_vec |
47b0e7ad | 1664 | #define TARGET_LITTLE_NAME "elf32-littlearc" |
886a2506 NC |
1665 | #define TARGET_BIG_SYM arc_elf32_be_vec |
1666 | #define TARGET_BIG_NAME "elf32-bigarc" | |
1667 | #define ELF_ARCH bfd_arch_arc | |
1668 | #define ELF_MACHINE_CODE EM_ARC_COMPACT | |
1669 | #define ELF_MACHINE_ALT1 EM_ARC_COMPACT2 | |
1670 | #define ELF_MAXPAGESIZE 0x2000 | |
1671 | ||
1672 | #define elf_info_to_howto_rel arc_info_to_howto_rel | |
1673 | #define elf_backend_object_p arc_elf_object_p | |
1674 | #define elf_backend_final_write_processing arc_elf_final_write_processing | |
1675 | ||
1676 | #define elf_backend_relocate_section elf_arc_relocate_section | |
1677 | #define elf_backend_check_relocs elf_arc_check_relocs | |
1678 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections | |
1679 | ||
1680 | #define elf_backend_adjust_dynamic_symbol elf_arc_adjust_dynamic_symbol | |
1681 | #define elf_backend_finish_dynamic_symbol elf_arc_finish_dynamic_symbol | |
1682 | ||
1683 | #define elf_backend_finish_dynamic_sections elf_arc_finish_dynamic_sections | |
1684 | #define elf_backend_size_dynamic_sections elf_arc_size_dynamic_sections | |
1685 | ||
1686 | #define elf_backend_can_gc_sections 1 | |
1687 | #define elf_backend_want_got_plt 1 | |
1688 | #define elf_backend_plt_readonly 1 | |
1689 | #define elf_backend_want_plt_sym 0 | |
1690 | #define elf_backend_got_header_size 12 | |
1691 | ||
1692 | #define elf_backend_may_use_rel_p 0 | |
1693 | #define elf_backend_may_use_rela_p 1 | |
1694 | #define elf_backend_default_use_rela_p 1 | |
252b5132 RH |
1695 | |
1696 | #include "elf32-target.h" |