Commit | Line | Data |
---|---|---|
b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
c889ba80 | 2 | /* This is included from relocs_32/64.c */ |
873b5271 | 3 | |
bf11655c KC |
4 | #define ElfW(type) _ElfW(ELF_BITS, type) |
5 | #define _ElfW(bits, type) __ElfW(bits, type) | |
6 | #define __ElfW(bits, type) Elf##bits##_##type | |
7 | ||
946166af | 8 | #define Elf_Addr ElfW(Addr) |
bf11655c KC |
9 | #define Elf_Ehdr ElfW(Ehdr) |
10 | #define Elf_Phdr ElfW(Phdr) | |
11 | #define Elf_Shdr ElfW(Shdr) | |
12 | #define Elf_Sym ElfW(Sym) | |
13 | ||
bf11655c | 14 | static Elf_Ehdr ehdr; |
5d442e63 KC |
15 | |
16 | struct relocs { | |
17 | uint32_t *offset; | |
18 | unsigned long count; | |
19 | unsigned long size; | |
20 | }; | |
21 | ||
22 | static struct relocs relocs16; | |
23 | static struct relocs relocs32; | |
6d24c5f7 JB |
24 | #if ELF_BITS == 64 |
25 | static struct relocs relocs32neg; | |
946166af | 26 | static struct relocs relocs64; |
6d24c5f7 | 27 | #endif |
968de4f0 | 28 | |
908ec7af | 29 | struct section { |
bf11655c | 30 | Elf_Shdr shdr; |
908ec7af | 31 | struct section *link; |
bf11655c KC |
32 | Elf_Sym *symtab; |
33 | Elf_Rel *reltab; | |
908ec7af PA |
34 | char *strtab; |
35 | }; | |
36 | static struct section *secs; | |
37 | ||
6520fe55 | 38 | static const char * const sym_regex_kernel[S_NSYMTYPES] = { |
6a044b3a VG |
39 | /* |
40 | * Following symbols have been audited. There values are constant and do | |
41 | * not change if bzImage is loaded at a different physical address than | |
42 | * the address for which it has been compiled. Don't warn user about | |
43 | * absolute relocations present w.r.t these symbols. | |
44 | */ | |
6520fe55 | 45 | [S_ABS] = |
873b5271 PA |
46 | "^(xen_irq_disable_direct_reloc$|" |
47 | "xen_save_fl_direct_reloc$|" | |
48 | "VDSO|" | |
6520fe55 | 49 | "__crc_)", |
6a044b3a | 50 | |
873b5271 PA |
51 | /* |
52 | * These symbols are known to be relative, even if the linker marks them | |
53 | * as absolute (typically defined outside any section in the linker script.) | |
54 | */ | |
6520fe55 | 55 | [S_REL] = |
a3e854d9 PA |
56 | "^(__init_(begin|end)|" |
57 | "__x86_cpu_dev_(start|end)|" | |
58 | "(__parainstructions|__alt_instructions)(|_end)|" | |
59 | "(__iommu_table|__apicdrivers|__smp_locks)(|_end)|" | |
fd952815 PA |
60 | "__(start|end)_pci_.*|" |
61 | "__(start|end)_builtin_fw|" | |
62 | "__(start|stop)___ksymtab(|_gpl|_unused|_unused_gpl|_gpl_future)|" | |
63 | "__(start|stop)___kcrctab(|_gpl|_unused|_unused_gpl|_gpl_future)|" | |
64 | "__(start|stop)___param|" | |
65 | "__(start|stop)___modver|" | |
66 | "__(start|stop)___bug_table|" | |
67 | "__tracedata_(start|end)|" | |
68 | "__(start|stop)_notes|" | |
69 | "__end_rodata|" | |
70 | "__initramfs_start|" | |
ea17e741 | 71 | "(jiffies|jiffies_64)|" |
c889ba80 | 72 | #if ELF_BITS == 64 |
946166af KC |
73 | "__per_cpu_load|" |
74 | "init_per_cpu__.*|" | |
75 | "__end_rodata_hpage_align|" | |
76 | #endif | |
d2312e33 | 77 | "__vvar_page|" |
a3e854d9 | 78 | "_end)$" |
6520fe55 PA |
79 | }; |
80 | ||
81 | ||
82 | static const char * const sym_regex_realmode[S_NSYMTYPES] = { | |
2a6de314 PA |
83 | /* |
84 | * These symbols are known to be relative, even if the linker marks them | |
85 | * as absolute (typically defined outside any section in the linker script.) | |
86 | */ | |
87 | [S_REL] = | |
88 | "^pa_", | |
89 | ||
6520fe55 PA |
90 | /* |
91 | * These are 16-bit segment symbols when compiling 16-bit code. | |
92 | */ | |
93 | [S_SEG] = | |
94 | "^real_mode_seg$", | |
95 | ||
96 | /* | |
97 | * These are offsets belonging to segments, as opposed to linear addresses, | |
98 | * when compiling 16-bit code. | |
99 | */ | |
100 | [S_LIN] = | |
101 | "^pa_", | |
102 | }; | |
103 | ||
104 | static const char * const *sym_regex; | |
105 | ||
106 | static regex_t sym_regex_c[S_NSYMTYPES]; | |
107 | static int is_reloc(enum symtype type, const char *sym_name) | |
6a044b3a | 108 | { |
6520fe55 PA |
109 | return sym_regex[type] && |
110 | !regexec(&sym_regex_c[type], sym_name, 0, NULL, 0); | |
873b5271 | 111 | } |
6a044b3a | 112 | |
6520fe55 | 113 | static void regex_init(int use_real_mode) |
873b5271 PA |
114 | { |
115 | char errbuf[128]; | |
116 | int err; | |
6520fe55 | 117 | int i; |
873b5271 | 118 | |
6520fe55 PA |
119 | if (use_real_mode) |
120 | sym_regex = sym_regex_realmode; | |
121 | else | |
122 | sym_regex = sym_regex_kernel; | |
123 | ||
124 | for (i = 0; i < S_NSYMTYPES; i++) { | |
125 | if (!sym_regex[i]) | |
126 | continue; | |
127 | ||
128 | err = regcomp(&sym_regex_c[i], sym_regex[i], | |
129 | REG_EXTENDED|REG_NOSUB); | |
130 | ||
131 | if (err) { | |
132 | regerror(err, &sym_regex_c[i], errbuf, sizeof errbuf); | |
133 | die("%s", errbuf); | |
134 | } | |
873b5271 | 135 | } |
6a044b3a VG |
136 | } |
137 | ||
968de4f0 EB |
138 | static const char *sym_type(unsigned type) |
139 | { | |
140 | static const char *type_name[] = { | |
141 | #define SYM_TYPE(X) [X] = #X | |
142 | SYM_TYPE(STT_NOTYPE), | |
143 | SYM_TYPE(STT_OBJECT), | |
144 | SYM_TYPE(STT_FUNC), | |
145 | SYM_TYPE(STT_SECTION), | |
146 | SYM_TYPE(STT_FILE), | |
147 | SYM_TYPE(STT_COMMON), | |
148 | SYM_TYPE(STT_TLS), | |
149 | #undef SYM_TYPE | |
150 | }; | |
151 | const char *name = "unknown sym type name"; | |
ca820181 | 152 | if (type < ARRAY_SIZE(type_name)) { |
968de4f0 EB |
153 | name = type_name[type]; |
154 | } | |
155 | return name; | |
156 | } | |
157 | ||
158 | static const char *sym_bind(unsigned bind) | |
159 | { | |
160 | static const char *bind_name[] = { | |
161 | #define SYM_BIND(X) [X] = #X | |
162 | SYM_BIND(STB_LOCAL), | |
163 | SYM_BIND(STB_GLOBAL), | |
164 | SYM_BIND(STB_WEAK), | |
165 | #undef SYM_BIND | |
166 | }; | |
167 | const char *name = "unknown sym bind name"; | |
ca820181 | 168 | if (bind < ARRAY_SIZE(bind_name)) { |
968de4f0 EB |
169 | name = bind_name[bind]; |
170 | } | |
171 | return name; | |
172 | } | |
173 | ||
174 | static const char *sym_visibility(unsigned visibility) | |
175 | { | |
176 | static const char *visibility_name[] = { | |
177 | #define SYM_VISIBILITY(X) [X] = #X | |
178 | SYM_VISIBILITY(STV_DEFAULT), | |
179 | SYM_VISIBILITY(STV_INTERNAL), | |
180 | SYM_VISIBILITY(STV_HIDDEN), | |
181 | SYM_VISIBILITY(STV_PROTECTED), | |
182 | #undef SYM_VISIBILITY | |
183 | }; | |
184 | const char *name = "unknown sym visibility name"; | |
ca820181 | 185 | if (visibility < ARRAY_SIZE(visibility_name)) { |
968de4f0 EB |
186 | name = visibility_name[visibility]; |
187 | } | |
188 | return name; | |
189 | } | |
190 | ||
191 | static const char *rel_type(unsigned type) | |
192 | { | |
193 | static const char *type_name[] = { | |
194 | #define REL_TYPE(X) [X] = #X | |
c889ba80 | 195 | #if ELF_BITS == 64 |
946166af KC |
196 | REL_TYPE(R_X86_64_NONE), |
197 | REL_TYPE(R_X86_64_64), | |
198 | REL_TYPE(R_X86_64_PC32), | |
199 | REL_TYPE(R_X86_64_GOT32), | |
200 | REL_TYPE(R_X86_64_PLT32), | |
201 | REL_TYPE(R_X86_64_COPY), | |
202 | REL_TYPE(R_X86_64_GLOB_DAT), | |
203 | REL_TYPE(R_X86_64_JUMP_SLOT), | |
204 | REL_TYPE(R_X86_64_RELATIVE), | |
205 | REL_TYPE(R_X86_64_GOTPCREL), | |
206 | REL_TYPE(R_X86_64_32), | |
207 | REL_TYPE(R_X86_64_32S), | |
208 | REL_TYPE(R_X86_64_16), | |
209 | REL_TYPE(R_X86_64_PC16), | |
210 | REL_TYPE(R_X86_64_8), | |
211 | REL_TYPE(R_X86_64_PC8), | |
212 | #else | |
968de4f0 EB |
213 | REL_TYPE(R_386_NONE), |
214 | REL_TYPE(R_386_32), | |
215 | REL_TYPE(R_386_PC32), | |
216 | REL_TYPE(R_386_GOT32), | |
217 | REL_TYPE(R_386_PLT32), | |
218 | REL_TYPE(R_386_COPY), | |
219 | REL_TYPE(R_386_GLOB_DAT), | |
220 | REL_TYPE(R_386_JMP_SLOT), | |
221 | REL_TYPE(R_386_RELATIVE), | |
222 | REL_TYPE(R_386_GOTOFF), | |
223 | REL_TYPE(R_386_GOTPC), | |
6520fe55 PA |
224 | REL_TYPE(R_386_8), |
225 | REL_TYPE(R_386_PC8), | |
226 | REL_TYPE(R_386_16), | |
227 | REL_TYPE(R_386_PC16), | |
946166af | 228 | #endif |
968de4f0 EB |
229 | #undef REL_TYPE |
230 | }; | |
231 | const char *name = "unknown type rel type name"; | |
873b5271 | 232 | if (type < ARRAY_SIZE(type_name) && type_name[type]) { |
968de4f0 EB |
233 | name = type_name[type]; |
234 | } | |
235 | return name; | |
236 | } | |
237 | ||
238 | static const char *sec_name(unsigned shndx) | |
239 | { | |
240 | const char *sec_strtab; | |
241 | const char *name; | |
908ec7af | 242 | sec_strtab = secs[ehdr.e_shstrndx].strtab; |
968de4f0 EB |
243 | name = "<noname>"; |
244 | if (shndx < ehdr.e_shnum) { | |
908ec7af | 245 | name = sec_strtab + secs[shndx].shdr.sh_name; |
968de4f0 EB |
246 | } |
247 | else if (shndx == SHN_ABS) { | |
248 | name = "ABSOLUTE"; | |
249 | } | |
250 | else if (shndx == SHN_COMMON) { | |
251 | name = "COMMON"; | |
252 | } | |
253 | return name; | |
254 | } | |
255 | ||
bf11655c | 256 | static const char *sym_name(const char *sym_strtab, Elf_Sym *sym) |
968de4f0 EB |
257 | { |
258 | const char *name; | |
259 | name = "<noname>"; | |
260 | if (sym->st_name) { | |
261 | name = sym_strtab + sym->st_name; | |
262 | } | |
263 | else { | |
6520fe55 | 264 | name = sec_name(sym->st_shndx); |
968de4f0 EB |
265 | } |
266 | return name; | |
267 | } | |
268 | ||
946166af KC |
269 | static Elf_Sym *sym_lookup(const char *symname) |
270 | { | |
271 | int i; | |
272 | for (i = 0; i < ehdr.e_shnum; i++) { | |
273 | struct section *sec = &secs[i]; | |
274 | long nsyms; | |
275 | char *strtab; | |
276 | Elf_Sym *symtab; | |
277 | Elf_Sym *sym; | |
968de4f0 | 278 | |
946166af KC |
279 | if (sec->shdr.sh_type != SHT_SYMTAB) |
280 | continue; | |
281 | ||
282 | nsyms = sec->shdr.sh_size/sizeof(Elf_Sym); | |
283 | symtab = sec->symtab; | |
284 | strtab = sec->link->strtab; | |
285 | ||
286 | for (sym = symtab; --nsyms >= 0; sym++) { | |
287 | if (!sym->st_name) | |
288 | continue; | |
289 | if (strcmp(symname, strtab + sym->st_name) == 0) | |
290 | return sym; | |
291 | } | |
292 | } | |
293 | return 0; | |
294 | } | |
968de4f0 | 295 | |
13da9e20 | 296 | #if BYTE_ORDER == LITTLE_ENDIAN |
968de4f0 EB |
297 | #define le16_to_cpu(val) (val) |
298 | #define le32_to_cpu(val) (val) | |
946166af | 299 | #define le64_to_cpu(val) (val) |
968de4f0 | 300 | #endif |
13da9e20 | 301 | #if BYTE_ORDER == BIG_ENDIAN |
968de4f0 EB |
302 | #define le16_to_cpu(val) bswap_16(val) |
303 | #define le32_to_cpu(val) bswap_32(val) | |
946166af | 304 | #define le64_to_cpu(val) bswap_64(val) |
968de4f0 EB |
305 | #endif |
306 | ||
307 | static uint16_t elf16_to_cpu(uint16_t val) | |
308 | { | |
309 | return le16_to_cpu(val); | |
310 | } | |
311 | ||
312 | static uint32_t elf32_to_cpu(uint32_t val) | |
313 | { | |
314 | return le32_to_cpu(val); | |
315 | } | |
316 | ||
bf11655c KC |
317 | #define elf_half_to_cpu(x) elf16_to_cpu(x) |
318 | #define elf_word_to_cpu(x) elf32_to_cpu(x) | |
946166af | 319 | |
c889ba80 | 320 | #if ELF_BITS == 64 |
946166af KC |
321 | static uint64_t elf64_to_cpu(uint64_t val) |
322 | { | |
323 | return le64_to_cpu(val); | |
324 | } | |
325 | #define elf_addr_to_cpu(x) elf64_to_cpu(x) | |
326 | #define elf_off_to_cpu(x) elf64_to_cpu(x) | |
327 | #define elf_xword_to_cpu(x) elf64_to_cpu(x) | |
328 | #else | |
bf11655c KC |
329 | #define elf_addr_to_cpu(x) elf32_to_cpu(x) |
330 | #define elf_off_to_cpu(x) elf32_to_cpu(x) | |
331 | #define elf_xword_to_cpu(x) elf32_to_cpu(x) | |
946166af | 332 | #endif |
bf11655c | 333 | |
968de4f0 EB |
334 | static void read_ehdr(FILE *fp) |
335 | { | |
336 | if (fread(&ehdr, sizeof(ehdr), 1, fp) != 1) { | |
337 | die("Cannot read ELF header: %s\n", | |
338 | strerror(errno)); | |
339 | } | |
8bd1796d | 340 | if (memcmp(ehdr.e_ident, ELFMAG, SELFMAG) != 0) { |
968de4f0 EB |
341 | die("No ELF magic\n"); |
342 | } | |
bf11655c KC |
343 | if (ehdr.e_ident[EI_CLASS] != ELF_CLASS) { |
344 | die("Not a %d bit executable\n", ELF_BITS); | |
968de4f0 EB |
345 | } |
346 | if (ehdr.e_ident[EI_DATA] != ELFDATA2LSB) { | |
347 | die("Not a LSB ELF executable\n"); | |
348 | } | |
349 | if (ehdr.e_ident[EI_VERSION] != EV_CURRENT) { | |
350 | die("Unknown ELF version\n"); | |
351 | } | |
352 | /* Convert the fields to native endian */ | |
bf11655c KC |
353 | ehdr.e_type = elf_half_to_cpu(ehdr.e_type); |
354 | ehdr.e_machine = elf_half_to_cpu(ehdr.e_machine); | |
355 | ehdr.e_version = elf_word_to_cpu(ehdr.e_version); | |
356 | ehdr.e_entry = elf_addr_to_cpu(ehdr.e_entry); | |
357 | ehdr.e_phoff = elf_off_to_cpu(ehdr.e_phoff); | |
358 | ehdr.e_shoff = elf_off_to_cpu(ehdr.e_shoff); | |
359 | ehdr.e_flags = elf_word_to_cpu(ehdr.e_flags); | |
360 | ehdr.e_ehsize = elf_half_to_cpu(ehdr.e_ehsize); | |
361 | ehdr.e_phentsize = elf_half_to_cpu(ehdr.e_phentsize); | |
362 | ehdr.e_phnum = elf_half_to_cpu(ehdr.e_phnum); | |
363 | ehdr.e_shentsize = elf_half_to_cpu(ehdr.e_shentsize); | |
364 | ehdr.e_shnum = elf_half_to_cpu(ehdr.e_shnum); | |
365 | ehdr.e_shstrndx = elf_half_to_cpu(ehdr.e_shstrndx); | |
968de4f0 EB |
366 | |
367 | if ((ehdr.e_type != ET_EXEC) && (ehdr.e_type != ET_DYN)) { | |
368 | die("Unsupported ELF header type\n"); | |
369 | } | |
bf11655c KC |
370 | if (ehdr.e_machine != ELF_MACHINE) { |
371 | die("Not for %s\n", ELF_MACHINE_NAME); | |
968de4f0 EB |
372 | } |
373 | if (ehdr.e_version != EV_CURRENT) { | |
374 | die("Unknown ELF version\n"); | |
375 | } | |
bf11655c | 376 | if (ehdr.e_ehsize != sizeof(Elf_Ehdr)) { |
968de4f0 EB |
377 | die("Bad Elf header size\n"); |
378 | } | |
bf11655c | 379 | if (ehdr.e_phentsize != sizeof(Elf_Phdr)) { |
968de4f0 EB |
380 | die("Bad program header entry\n"); |
381 | } | |
bf11655c | 382 | if (ehdr.e_shentsize != sizeof(Elf_Shdr)) { |
968de4f0 EB |
383 | die("Bad section header entry\n"); |
384 | } | |
385 | if (ehdr.e_shstrndx >= ehdr.e_shnum) { | |
386 | die("String table index out of bounds\n"); | |
387 | } | |
388 | } | |
389 | ||
390 | static void read_shdrs(FILE *fp) | |
391 | { | |
392 | int i; | |
bf11655c | 393 | Elf_Shdr shdr; |
908ec7af PA |
394 | |
395 | secs = calloc(ehdr.e_shnum, sizeof(struct section)); | |
396 | if (!secs) { | |
397 | die("Unable to allocate %d section headers\n", | |
398 | ehdr.e_shnum); | |
968de4f0 EB |
399 | } |
400 | if (fseek(fp, ehdr.e_shoff, SEEK_SET) < 0) { | |
401 | die("Seek to %d failed: %s\n", | |
402 | ehdr.e_shoff, strerror(errno)); | |
403 | } | |
908ec7af PA |
404 | for (i = 0; i < ehdr.e_shnum; i++) { |
405 | struct section *sec = &secs[i]; | |
406 | if (fread(&shdr, sizeof shdr, 1, fp) != 1) | |
407 | die("Cannot read ELF section headers %d/%d: %s\n", | |
408 | i, ehdr.e_shnum, strerror(errno)); | |
bf11655c KC |
409 | sec->shdr.sh_name = elf_word_to_cpu(shdr.sh_name); |
410 | sec->shdr.sh_type = elf_word_to_cpu(shdr.sh_type); | |
411 | sec->shdr.sh_flags = elf_xword_to_cpu(shdr.sh_flags); | |
412 | sec->shdr.sh_addr = elf_addr_to_cpu(shdr.sh_addr); | |
413 | sec->shdr.sh_offset = elf_off_to_cpu(shdr.sh_offset); | |
414 | sec->shdr.sh_size = elf_xword_to_cpu(shdr.sh_size); | |
415 | sec->shdr.sh_link = elf_word_to_cpu(shdr.sh_link); | |
416 | sec->shdr.sh_info = elf_word_to_cpu(shdr.sh_info); | |
417 | sec->shdr.sh_addralign = elf_xword_to_cpu(shdr.sh_addralign); | |
418 | sec->shdr.sh_entsize = elf_xword_to_cpu(shdr.sh_entsize); | |
908ec7af PA |
419 | if (sec->shdr.sh_link < ehdr.e_shnum) |
420 | sec->link = &secs[sec->shdr.sh_link]; | |
968de4f0 EB |
421 | } |
422 | ||
423 | } | |
424 | ||
425 | static void read_strtabs(FILE *fp) | |
426 | { | |
427 | int i; | |
908ec7af PA |
428 | for (i = 0; i < ehdr.e_shnum; i++) { |
429 | struct section *sec = &secs[i]; | |
430 | if (sec->shdr.sh_type != SHT_STRTAB) { | |
968de4f0 EB |
431 | continue; |
432 | } | |
908ec7af PA |
433 | sec->strtab = malloc(sec->shdr.sh_size); |
434 | if (!sec->strtab) { | |
968de4f0 | 435 | die("malloc of %d bytes for strtab failed\n", |
908ec7af | 436 | sec->shdr.sh_size); |
968de4f0 | 437 | } |
908ec7af | 438 | if (fseek(fp, sec->shdr.sh_offset, SEEK_SET) < 0) { |
968de4f0 | 439 | die("Seek to %d failed: %s\n", |
908ec7af | 440 | sec->shdr.sh_offset, strerror(errno)); |
968de4f0 | 441 | } |
908ec7af PA |
442 | if (fread(sec->strtab, 1, sec->shdr.sh_size, fp) |
443 | != sec->shdr.sh_size) { | |
968de4f0 EB |
444 | die("Cannot read symbol table: %s\n", |
445 | strerror(errno)); | |
446 | } | |
447 | } | |
448 | } | |
449 | ||
450 | static void read_symtabs(FILE *fp) | |
451 | { | |
452 | int i,j; | |
908ec7af PA |
453 | for (i = 0; i < ehdr.e_shnum; i++) { |
454 | struct section *sec = &secs[i]; | |
455 | if (sec->shdr.sh_type != SHT_SYMTAB) { | |
968de4f0 EB |
456 | continue; |
457 | } | |
908ec7af PA |
458 | sec->symtab = malloc(sec->shdr.sh_size); |
459 | if (!sec->symtab) { | |
968de4f0 | 460 | die("malloc of %d bytes for symtab failed\n", |
908ec7af | 461 | sec->shdr.sh_size); |
968de4f0 | 462 | } |
908ec7af | 463 | if (fseek(fp, sec->shdr.sh_offset, SEEK_SET) < 0) { |
968de4f0 | 464 | die("Seek to %d failed: %s\n", |
908ec7af | 465 | sec->shdr.sh_offset, strerror(errno)); |
968de4f0 | 466 | } |
908ec7af PA |
467 | if (fread(sec->symtab, 1, sec->shdr.sh_size, fp) |
468 | != sec->shdr.sh_size) { | |
968de4f0 EB |
469 | die("Cannot read symbol table: %s\n", |
470 | strerror(errno)); | |
471 | } | |
bf11655c KC |
472 | for (j = 0; j < sec->shdr.sh_size/sizeof(Elf_Sym); j++) { |
473 | Elf_Sym *sym = &sec->symtab[j]; | |
474 | sym->st_name = elf_word_to_cpu(sym->st_name); | |
475 | sym->st_value = elf_addr_to_cpu(sym->st_value); | |
476 | sym->st_size = elf_xword_to_cpu(sym->st_size); | |
477 | sym->st_shndx = elf_half_to_cpu(sym->st_shndx); | |
968de4f0 EB |
478 | } |
479 | } | |
480 | } | |
481 | ||
482 | ||
483 | static void read_relocs(FILE *fp) | |
484 | { | |
485 | int i,j; | |
908ec7af PA |
486 | for (i = 0; i < ehdr.e_shnum; i++) { |
487 | struct section *sec = &secs[i]; | |
bf11655c | 488 | if (sec->shdr.sh_type != SHT_REL_TYPE) { |
968de4f0 EB |
489 | continue; |
490 | } | |
908ec7af PA |
491 | sec->reltab = malloc(sec->shdr.sh_size); |
492 | if (!sec->reltab) { | |
968de4f0 | 493 | die("malloc of %d bytes for relocs failed\n", |
908ec7af | 494 | sec->shdr.sh_size); |
968de4f0 | 495 | } |
908ec7af | 496 | if (fseek(fp, sec->shdr.sh_offset, SEEK_SET) < 0) { |
968de4f0 | 497 | die("Seek to %d failed: %s\n", |
908ec7af | 498 | sec->shdr.sh_offset, strerror(errno)); |
968de4f0 | 499 | } |
908ec7af PA |
500 | if (fread(sec->reltab, 1, sec->shdr.sh_size, fp) |
501 | != sec->shdr.sh_size) { | |
968de4f0 EB |
502 | die("Cannot read symbol table: %s\n", |
503 | strerror(errno)); | |
504 | } | |
bf11655c KC |
505 | for (j = 0; j < sec->shdr.sh_size/sizeof(Elf_Rel); j++) { |
506 | Elf_Rel *rel = &sec->reltab[j]; | |
507 | rel->r_offset = elf_addr_to_cpu(rel->r_offset); | |
508 | rel->r_info = elf_xword_to_cpu(rel->r_info); | |
946166af KC |
509 | #if (SHT_REL_TYPE == SHT_RELA) |
510 | rel->r_addend = elf_xword_to_cpu(rel->r_addend); | |
511 | #endif | |
968de4f0 EB |
512 | } |
513 | } | |
514 | } | |
515 | ||
516 | ||
517 | static void print_absolute_symbols(void) | |
518 | { | |
519 | int i; | |
946166af KC |
520 | const char *format; |
521 | ||
c889ba80 | 522 | if (ELF_BITS == 64) |
946166af KC |
523 | format = "%5d %016"PRIx64" %5"PRId64" %10s %10s %12s %s\n"; |
524 | else | |
525 | format = "%5d %08"PRIx32" %5"PRId32" %10s %10s %12s %s\n"; | |
526 | ||
968de4f0 EB |
527 | printf("Absolute symbols\n"); |
528 | printf(" Num: Value Size Type Bind Visibility Name\n"); | |
908ec7af PA |
529 | for (i = 0; i < ehdr.e_shnum; i++) { |
530 | struct section *sec = &secs[i]; | |
968de4f0 | 531 | char *sym_strtab; |
968de4f0 | 532 | int j; |
908ec7af PA |
533 | |
534 | if (sec->shdr.sh_type != SHT_SYMTAB) { | |
968de4f0 EB |
535 | continue; |
536 | } | |
908ec7af | 537 | sym_strtab = sec->link->strtab; |
bf11655c KC |
538 | for (j = 0; j < sec->shdr.sh_size/sizeof(Elf_Sym); j++) { |
539 | Elf_Sym *sym; | |
968de4f0 | 540 | const char *name; |
908ec7af | 541 | sym = &sec->symtab[j]; |
968de4f0 EB |
542 | name = sym_name(sym_strtab, sym); |
543 | if (sym->st_shndx != SHN_ABS) { | |
544 | continue; | |
545 | } | |
946166af | 546 | printf(format, |
968de4f0 | 547 | j, sym->st_value, sym->st_size, |
bf11655c KC |
548 | sym_type(ELF_ST_TYPE(sym->st_info)), |
549 | sym_bind(ELF_ST_BIND(sym->st_info)), | |
550 | sym_visibility(ELF_ST_VISIBILITY(sym->st_other)), | |
968de4f0 EB |
551 | name); |
552 | } | |
553 | } | |
554 | printf("\n"); | |
555 | } | |
556 | ||
557 | static void print_absolute_relocs(void) | |
558 | { | |
6a044b3a | 559 | int i, printed = 0; |
946166af KC |
560 | const char *format; |
561 | ||
c889ba80 | 562 | if (ELF_BITS == 64) |
946166af KC |
563 | format = "%016"PRIx64" %016"PRIx64" %10s %016"PRIx64" %s\n"; |
564 | else | |
565 | format = "%08"PRIx32" %08"PRIx32" %10s %08"PRIx32" %s\n"; | |
6a044b3a | 566 | |
908ec7af PA |
567 | for (i = 0; i < ehdr.e_shnum; i++) { |
568 | struct section *sec = &secs[i]; | |
569 | struct section *sec_applies, *sec_symtab; | |
968de4f0 | 570 | char *sym_strtab; |
bf11655c | 571 | Elf_Sym *sh_symtab; |
968de4f0 | 572 | int j; |
bf11655c | 573 | if (sec->shdr.sh_type != SHT_REL_TYPE) { |
968de4f0 EB |
574 | continue; |
575 | } | |
908ec7af PA |
576 | sec_symtab = sec->link; |
577 | sec_applies = &secs[sec->shdr.sh_info]; | |
578 | if (!(sec_applies->shdr.sh_flags & SHF_ALLOC)) { | |
968de4f0 EB |
579 | continue; |
580 | } | |
908ec7af PA |
581 | sh_symtab = sec_symtab->symtab; |
582 | sym_strtab = sec_symtab->link->strtab; | |
bf11655c KC |
583 | for (j = 0; j < sec->shdr.sh_size/sizeof(Elf_Rel); j++) { |
584 | Elf_Rel *rel; | |
585 | Elf_Sym *sym; | |
968de4f0 | 586 | const char *name; |
908ec7af | 587 | rel = &sec->reltab[j]; |
bf11655c | 588 | sym = &sh_symtab[ELF_R_SYM(rel->r_info)]; |
968de4f0 EB |
589 | name = sym_name(sym_strtab, sym); |
590 | if (sym->st_shndx != SHN_ABS) { | |
591 | continue; | |
592 | } | |
6a044b3a VG |
593 | |
594 | /* Absolute symbols are not relocated if bzImage is | |
595 | * loaded at a non-compiled address. Display a warning | |
596 | * to user at compile time about the absolute | |
597 | * relocations present. | |
598 | * | |
599 | * User need to audit the code to make sure | |
600 | * some symbols which should have been section | |
601 | * relative have not become absolute because of some | |
602 | * linker optimization or wrong programming usage. | |
603 | * | |
604 | * Before warning check if this absolute symbol | |
605 | * relocation is harmless. | |
606 | */ | |
6520fe55 | 607 | if (is_reloc(S_ABS, name) || is_reloc(S_REL, name)) |
6a044b3a VG |
608 | continue; |
609 | ||
610 | if (!printed) { | |
611 | printf("WARNING: Absolute relocations" | |
612 | " present\n"); | |
613 | printf("Offset Info Type Sym.Value " | |
614 | "Sym.Name\n"); | |
615 | printed = 1; | |
616 | } | |
617 | ||
946166af | 618 | printf(format, |
968de4f0 EB |
619 | rel->r_offset, |
620 | rel->r_info, | |
bf11655c | 621 | rel_type(ELF_R_TYPE(rel->r_info)), |
968de4f0 EB |
622 | sym->st_value, |
623 | name); | |
624 | } | |
625 | } | |
6a044b3a VG |
626 | |
627 | if (printed) | |
628 | printf("\n"); | |
968de4f0 EB |
629 | } |
630 | ||
5d442e63 KC |
631 | static void add_reloc(struct relocs *r, uint32_t offset) |
632 | { | |
633 | if (r->count == r->size) { | |
634 | unsigned long newsize = r->size + 50000; | |
635 | void *mem = realloc(r->offset, newsize * sizeof(r->offset[0])); | |
636 | ||
637 | if (!mem) | |
638 | die("realloc of %ld entries for relocs failed\n", | |
639 | newsize); | |
640 | r->offset = mem; | |
641 | r->size = newsize; | |
642 | } | |
643 | r->offset[r->count++] = offset; | |
644 | } | |
645 | ||
646 | static void walk_relocs(int (*process)(struct section *sec, Elf_Rel *rel, | |
647 | Elf_Sym *sym, const char *symname)) | |
968de4f0 EB |
648 | { |
649 | int i; | |
650 | /* Walk through the relocations */ | |
908ec7af | 651 | for (i = 0; i < ehdr.e_shnum; i++) { |
968de4f0 | 652 | char *sym_strtab; |
bf11655c | 653 | Elf_Sym *sh_symtab; |
908ec7af | 654 | struct section *sec_applies, *sec_symtab; |
968de4f0 | 655 | int j; |
908ec7af PA |
656 | struct section *sec = &secs[i]; |
657 | ||
bf11655c | 658 | if (sec->shdr.sh_type != SHT_REL_TYPE) { |
968de4f0 EB |
659 | continue; |
660 | } | |
908ec7af PA |
661 | sec_symtab = sec->link; |
662 | sec_applies = &secs[sec->shdr.sh_info]; | |
663 | if (!(sec_applies->shdr.sh_flags & SHF_ALLOC)) { | |
968de4f0 EB |
664 | continue; |
665 | } | |
908ec7af | 666 | sh_symtab = sec_symtab->symtab; |
cc65f1ec | 667 | sym_strtab = sec_symtab->link->strtab; |
bf11655c | 668 | for (j = 0; j < sec->shdr.sh_size/sizeof(Elf_Rel); j++) { |
5d442e63 KC |
669 | Elf_Rel *rel = &sec->reltab[j]; |
670 | Elf_Sym *sym = &sh_symtab[ELF_R_SYM(rel->r_info)]; | |
671 | const char *symname = sym_name(sym_strtab, sym); | |
24ab82bd | 672 | |
5d442e63 KC |
673 | process(sec, rel, sym, symname); |
674 | } | |
675 | } | |
676 | } | |
677 | ||
946166af KC |
678 | /* |
679 | * The .data..percpu section is a special case for x86_64 SMP kernels. | |
680 | * It is used to initialize the actual per_cpu areas and to provide | |
681 | * definitions for the per_cpu variables that correspond to their offsets | |
682 | * within the percpu area. Since the values of all of the symbols need | |
683 | * to be offsets from the start of the per_cpu area the virtual address | |
684 | * (sh_addr) of .data..percpu is 0 in SMP kernels. | |
685 | * | |
686 | * This means that: | |
687 | * | |
688 | * Relocations that reference symbols in the per_cpu area do not | |
689 | * need further relocation (since the value is an offset relative | |
690 | * to the start of the per_cpu area that does not change). | |
691 | * | |
692 | * Relocations that apply to the per_cpu area need to have their | |
693 | * offset adjusted by by the value of __per_cpu_load to make them | |
694 | * point to the correct place in the loaded image (because the | |
695 | * virtual address of .data..percpu is 0). | |
696 | * | |
697 | * For non SMP kernels .data..percpu is linked as part of the normal | |
698 | * kernel data and does not require special treatment. | |
699 | * | |
700 | */ | |
701 | static int per_cpu_shndx = -1; | |
eeeda4cd | 702 | static Elf_Addr per_cpu_load_addr; |
946166af KC |
703 | |
704 | static void percpu_init(void) | |
705 | { | |
706 | int i; | |
707 | for (i = 0; i < ehdr.e_shnum; i++) { | |
708 | ElfW(Sym) *sym; | |
709 | if (strcmp(sec_name(i), ".data..percpu")) | |
710 | continue; | |
711 | ||
712 | if (secs[i].shdr.sh_addr != 0) /* non SMP kernel */ | |
713 | return; | |
714 | ||
715 | sym = sym_lookup("__per_cpu_load"); | |
716 | if (!sym) | |
717 | die("can't find __per_cpu_load\n"); | |
718 | ||
719 | per_cpu_shndx = i; | |
720 | per_cpu_load_addr = sym->st_value; | |
721 | return; | |
722 | } | |
723 | } | |
724 | ||
c889ba80 PA |
725 | #if ELF_BITS == 64 |
726 | ||
946166af KC |
727 | /* |
728 | * Check to see if a symbol lies in the .data..percpu section. | |
d751c169 MD |
729 | * |
730 | * The linker incorrectly associates some symbols with the | |
731 | * .data..percpu section so we also need to check the symbol | |
732 | * name to make sure that we classify the symbol correctly. | |
733 | * | |
734 | * The GNU linker incorrectly associates: | |
735 | * __init_begin | |
aec58baf | 736 | * __per_cpu_load |
d751c169 MD |
737 | * |
738 | * The "gold" linker incorrectly associates: | |
739 | * init_per_cpu__irq_stack_union | |
740 | * init_per_cpu__gdt_page | |
946166af KC |
741 | */ |
742 | static int is_percpu_sym(ElfW(Sym) *sym, const char *symname) | |
743 | { | |
744 | return (sym->st_shndx == per_cpu_shndx) && | |
d751c169 | 745 | strcmp(symname, "__init_begin") && |
aec58baf | 746 | strcmp(symname, "__per_cpu_load") && |
d751c169 | 747 | strncmp(symname, "init_per_cpu_", 13); |
946166af KC |
748 | } |
749 | ||
c889ba80 | 750 | |
946166af KC |
751 | static int do_reloc64(struct section *sec, Elf_Rel *rel, ElfW(Sym) *sym, |
752 | const char *symname) | |
753 | { | |
754 | unsigned r_type = ELF64_R_TYPE(rel->r_info); | |
755 | ElfW(Addr) offset = rel->r_offset; | |
756 | int shn_abs = (sym->st_shndx == SHN_ABS) && !is_reloc(S_REL, symname); | |
757 | ||
758 | if (sym->st_shndx == SHN_UNDEF) | |
759 | return 0; | |
760 | ||
761 | /* | |
762 | * Adjust the offset if this reloc applies to the percpu section. | |
763 | */ | |
764 | if (sec->shdr.sh_info == per_cpu_shndx) | |
765 | offset += per_cpu_load_addr; | |
766 | ||
767 | switch (r_type) { | |
768 | case R_X86_64_NONE: | |
6d24c5f7 JB |
769 | /* NONE can be ignored. */ |
770 | break; | |
771 | ||
946166af KC |
772 | case R_X86_64_PC32: |
773 | /* | |
6d24c5f7 JB |
774 | * PC relative relocations don't need to be adjusted unless |
775 | * referencing a percpu symbol. | |
946166af | 776 | */ |
6d24c5f7 JB |
777 | if (is_percpu_sym(sym, symname)) |
778 | add_reloc(&relocs32neg, offset); | |
946166af KC |
779 | break; |
780 | ||
781 | case R_X86_64_32: | |
782 | case R_X86_64_32S: | |
783 | case R_X86_64_64: | |
784 | /* | |
785 | * References to the percpu area don't need to be adjusted. | |
786 | */ | |
787 | if (is_percpu_sym(sym, symname)) | |
788 | break; | |
789 | ||
790 | if (shn_abs) { | |
791 | /* | |
792 | * Whitelisted absolute symbols do not require | |
793 | * relocation. | |
794 | */ | |
795 | if (is_reloc(S_ABS, symname)) | |
796 | break; | |
797 | ||
798 | die("Invalid absolute %s relocation: %s\n", | |
799 | rel_type(r_type), symname); | |
800 | break; | |
801 | } | |
802 | ||
803 | /* | |
804 | * Relocation offsets for 64 bit kernels are output | |
805 | * as 32 bits and sign extended back to 64 bits when | |
806 | * the relocations are processed. | |
807 | * Make sure that the offset will fit. | |
808 | */ | |
809 | if ((int32_t)offset != (int64_t)offset) | |
810 | die("Relocation offset doesn't fit in 32 bits\n"); | |
811 | ||
812 | if (r_type == R_X86_64_64) | |
813 | add_reloc(&relocs64, offset); | |
814 | else | |
815 | add_reloc(&relocs32, offset); | |
816 | break; | |
817 | ||
818 | default: | |
819 | die("Unsupported relocation type: %s (%d)\n", | |
820 | rel_type(r_type), r_type); | |
821 | break; | |
822 | } | |
823 | ||
824 | return 0; | |
825 | } | |
826 | ||
c889ba80 | 827 | #else |
946166af KC |
828 | |
829 | static int do_reloc32(struct section *sec, Elf_Rel *rel, Elf_Sym *sym, | |
830 | const char *symname) | |
5d442e63 KC |
831 | { |
832 | unsigned r_type = ELF32_R_TYPE(rel->r_info); | |
833 | int shn_abs = (sym->st_shndx == SHN_ABS) && !is_reloc(S_REL, symname); | |
834 | ||
835 | switch (r_type) { | |
836 | case R_386_NONE: | |
837 | case R_386_PC32: | |
838 | case R_386_PC16: | |
839 | case R_386_PC8: | |
840 | /* | |
841 | * NONE can be ignored and PC relative relocations don't | |
842 | * need to be adjusted. | |
843 | */ | |
844 | break; | |
845 | ||
846 | case R_386_32: | |
847 | if (shn_abs) { | |
848 | /* | |
849 | * Whitelisted absolute symbols do not require | |
850 | * relocation. | |
851 | */ | |
852 | if (is_reloc(S_ABS, symname)) | |
873b5271 | 853 | break; |
6520fe55 | 854 | |
5d442e63 KC |
855 | die("Invalid absolute %s relocation: %s\n", |
856 | rel_type(r_type), symname); | |
857 | break; | |
858 | } | |
859 | ||
860 | add_reloc(&relocs32, rel->r_offset); | |
861 | break; | |
862 | ||
863 | default: | |
864 | die("Unsupported relocation type: %s (%d)\n", | |
865 | rel_type(r_type), r_type); | |
866 | break; | |
867 | } | |
868 | ||
869 | return 0; | |
870 | } | |
871 | ||
872 | static int do_reloc_real(struct section *sec, Elf_Rel *rel, Elf_Sym *sym, | |
873 | const char *symname) | |
874 | { | |
875 | unsigned r_type = ELF32_R_TYPE(rel->r_info); | |
876 | int shn_abs = (sym->st_shndx == SHN_ABS) && !is_reloc(S_REL, symname); | |
877 | ||
878 | switch (r_type) { | |
879 | case R_386_NONE: | |
880 | case R_386_PC32: | |
881 | case R_386_PC16: | |
882 | case R_386_PC8: | |
883 | /* | |
884 | * NONE can be ignored and PC relative relocations don't | |
885 | * need to be adjusted. | |
886 | */ | |
887 | break; | |
888 | ||
889 | case R_386_16: | |
890 | if (shn_abs) { | |
891 | /* | |
892 | * Whitelisted absolute symbols do not require | |
893 | * relocation. | |
894 | */ | |
895 | if (is_reloc(S_ABS, symname)) | |
6520fe55 PA |
896 | break; |
897 | ||
5d442e63 KC |
898 | if (is_reloc(S_SEG, symname)) { |
899 | add_reloc(&relocs16, rel->r_offset); | |
900 | break; | |
901 | } | |
902 | } else { | |
903 | if (!is_reloc(S_LIN, symname)) | |
873b5271 | 904 | break; |
5d442e63 KC |
905 | } |
906 | die("Invalid %s %s relocation: %s\n", | |
907 | shn_abs ? "absolute" : "relative", | |
908 | rel_type(r_type), symname); | |
909 | break; | |
910 | ||
911 | case R_386_32: | |
912 | if (shn_abs) { | |
913 | /* | |
914 | * Whitelisted absolute symbols do not require | |
915 | * relocation. | |
916 | */ | |
917 | if (is_reloc(S_ABS, symname)) | |
918 | break; | |
919 | ||
920 | if (is_reloc(S_REL, symname)) { | |
921 | add_reloc(&relocs32, rel->r_offset); | |
873b5271 | 922 | break; |
968de4f0 | 923 | } |
5d442e63 KC |
924 | } else { |
925 | if (is_reloc(S_LIN, symname)) | |
926 | add_reloc(&relocs32, rel->r_offset); | |
927 | break; | |
968de4f0 | 928 | } |
5d442e63 KC |
929 | die("Invalid %s %s relocation: %s\n", |
930 | shn_abs ? "absolute" : "relative", | |
931 | rel_type(r_type), symname); | |
932 | break; | |
968de4f0 | 933 | |
5d442e63 KC |
934 | default: |
935 | die("Unsupported relocation type: %s (%d)\n", | |
936 | rel_type(r_type), r_type); | |
937 | break; | |
938 | } | |
968de4f0 | 939 | |
5d442e63 | 940 | return 0; |
968de4f0 EB |
941 | } |
942 | ||
c889ba80 PA |
943 | #endif |
944 | ||
968de4f0 EB |
945 | static int cmp_relocs(const void *va, const void *vb) |
946 | { | |
5d442e63 | 947 | const uint32_t *a, *b; |
968de4f0 EB |
948 | a = va; b = vb; |
949 | return (*a == *b)? 0 : (*a > *b)? 1 : -1; | |
950 | } | |
951 | ||
5d442e63 KC |
952 | static void sort_relocs(struct relocs *r) |
953 | { | |
954 | qsort(r->offset, r->count, sizeof(r->offset[0]), cmp_relocs); | |
955 | } | |
956 | ||
957 | static int write32(uint32_t v, FILE *f) | |
6520fe55 PA |
958 | { |
959 | unsigned char buf[4]; | |
960 | ||
961 | put_unaligned_le32(v, buf); | |
962 | return fwrite(buf, 1, 4, f) == 4 ? 0 : -1; | |
963 | } | |
964 | ||
5d442e63 KC |
965 | static int write32_as_text(uint32_t v, FILE *f) |
966 | { | |
967 | return fprintf(f, "\t.long 0x%08"PRIx32"\n", v) > 0 ? 0 : -1; | |
968 | } | |
969 | ||
6520fe55 | 970 | static void emit_relocs(int as_text, int use_real_mode) |
968de4f0 EB |
971 | { |
972 | int i; | |
5d442e63 | 973 | int (*write_reloc)(uint32_t, FILE *) = write32; |
946166af KC |
974 | int (*do_reloc)(struct section *sec, Elf_Rel *rel, Elf_Sym *sym, |
975 | const char *symname); | |
976 | ||
c889ba80 PA |
977 | #if ELF_BITS == 64 |
978 | if (!use_real_mode) | |
946166af | 979 | do_reloc = do_reloc64; |
c889ba80 PA |
980 | else |
981 | die("--realmode not valid for a 64-bit ELF file"); | |
982 | #else | |
983 | if (!use_real_mode) | |
946166af KC |
984 | do_reloc = do_reloc32; |
985 | else | |
986 | do_reloc = do_reloc_real; | |
c889ba80 | 987 | #endif |
6520fe55 | 988 | |
968de4f0 | 989 | /* Collect up the relocations */ |
946166af | 990 | walk_relocs(do_reloc); |
6520fe55 | 991 | |
5d442e63 | 992 | if (relocs16.count && !use_real_mode) |
6520fe55 | 993 | die("Segment relocations found but --realmode not specified\n"); |
968de4f0 EB |
994 | |
995 | /* Order the relocations for more efficient processing */ | |
5d442e63 | 996 | sort_relocs(&relocs32); |
6d24c5f7 JB |
997 | #if ELF_BITS == 64 |
998 | sort_relocs(&relocs32neg); | |
946166af | 999 | sort_relocs(&relocs64); |
7ebb9167 MT |
1000 | #else |
1001 | sort_relocs(&relocs16); | |
6d24c5f7 | 1002 | #endif |
968de4f0 EB |
1003 | |
1004 | /* Print the relocations */ | |
1005 | if (as_text) { | |
1006 | /* Print the relocations in a form suitable that | |
1007 | * gas will like. | |
1008 | */ | |
1009 | printf(".section \".data.reloc\",\"a\"\n"); | |
1010 | printf(".balign 4\n"); | |
5d442e63 | 1011 | write_reloc = write32_as_text; |
968de4f0 | 1012 | } |
6520fe55 | 1013 | |
5d442e63 KC |
1014 | if (use_real_mode) { |
1015 | write_reloc(relocs16.count, stdout); | |
1016 | for (i = 0; i < relocs16.count; i++) | |
1017 | write_reloc(relocs16.offset[i], stdout); | |
1018 | ||
1019 | write_reloc(relocs32.count, stdout); | |
1020 | for (i = 0; i < relocs32.count; i++) | |
1021 | write_reloc(relocs32.offset[i], stdout); | |
1022 | } else { | |
6d24c5f7 JB |
1023 | #if ELF_BITS == 64 |
1024 | /* Print a stop */ | |
1025 | write_reloc(0, stdout); | |
946166af | 1026 | |
6d24c5f7 JB |
1027 | /* Now print each relocation */ |
1028 | for (i = 0; i < relocs64.count; i++) | |
1029 | write_reloc(relocs64.offset[i], stdout); | |
1030 | ||
1031 | /* Print a stop */ | |
1032 | write_reloc(0, stdout); | |
1033 | ||
1034 | /* Now print each inverse 32-bit relocation */ | |
1035 | for (i = 0; i < relocs32neg.count; i++) | |
1036 | write_reloc(relocs32neg.offset[i], stdout); | |
1037 | #endif | |
946166af | 1038 | |
5d442e63 KC |
1039 | /* Print a stop */ |
1040 | write_reloc(0, stdout); | |
1041 | ||
1042 | /* Now print each relocation */ | |
1043 | for (i = 0; i < relocs32.count; i++) | |
1044 | write_reloc(relocs32.offset[i], stdout); | |
968de4f0 EB |
1045 | } |
1046 | } | |
1047 | ||
214a8876 MD |
1048 | /* |
1049 | * As an aid to debugging problems with different linkers | |
1050 | * print summary information about the relocs. | |
1051 | * Since different linkers tend to emit the sections in | |
1052 | * different orders we use the section names in the output. | |
1053 | */ | |
1054 | static int do_reloc_info(struct section *sec, Elf_Rel *rel, ElfW(Sym) *sym, | |
1055 | const char *symname) | |
1056 | { | |
1057 | printf("%s\t%s\t%s\t%s\n", | |
1058 | sec_name(sec->shdr.sh_info), | |
1059 | rel_type(ELF_R_TYPE(rel->r_info)), | |
1060 | symname, | |
1061 | sec_name(sym->st_shndx)); | |
1062 | return 0; | |
1063 | } | |
1064 | ||
1065 | static void print_reloc_info(void) | |
1066 | { | |
1067 | printf("reloc section\treloc type\tsymbol\tsymbol section\n"); | |
1068 | walk_relocs(do_reloc_info); | |
1069 | } | |
1070 | ||
c889ba80 PA |
1071 | #if ELF_BITS == 64 |
1072 | # define process process_64 | |
1073 | #else | |
1074 | # define process process_32 | |
1075 | #endif | |
968de4f0 | 1076 | |
c889ba80 | 1077 | void process(FILE *fp, int use_real_mode, int as_text, |
214a8876 MD |
1078 | int show_absolute_syms, int show_absolute_relocs, |
1079 | int show_reloc_info) | |
968de4f0 | 1080 | { |
6520fe55 | 1081 | regex_init(use_real_mode); |
968de4f0 EB |
1082 | read_ehdr(fp); |
1083 | read_shdrs(fp); | |
1084 | read_strtabs(fp); | |
1085 | read_symtabs(fp); | |
1086 | read_relocs(fp); | |
c889ba80 | 1087 | if (ELF_BITS == 64) |
946166af | 1088 | percpu_init(); |
6a044b3a | 1089 | if (show_absolute_syms) { |
968de4f0 | 1090 | print_absolute_symbols(); |
c889ba80 | 1091 | return; |
6a044b3a VG |
1092 | } |
1093 | if (show_absolute_relocs) { | |
968de4f0 | 1094 | print_absolute_relocs(); |
c889ba80 | 1095 | return; |
968de4f0 | 1096 | } |
214a8876 MD |
1097 | if (show_reloc_info) { |
1098 | print_reloc_info(); | |
1099 | return; | |
1100 | } | |
6520fe55 | 1101 | emit_relocs(as_text, use_real_mode); |
968de4f0 | 1102 | } |