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|" | |
a29dba16 | 70 | "__end_rodata_aligned|" |
fd952815 | 71 | "__initramfs_start|" |
ea17e741 | 72 | "(jiffies|jiffies_64)|" |
c889ba80 | 73 | #if ELF_BITS == 64 |
946166af KC |
74 | "__per_cpu_load|" |
75 | "init_per_cpu__.*|" | |
76 | "__end_rodata_hpage_align|" | |
77 | #endif | |
d2312e33 | 78 | "__vvar_page|" |
a3e854d9 | 79 | "_end)$" |
6520fe55 PA |
80 | }; |
81 | ||
82 | ||
83 | static const char * const sym_regex_realmode[S_NSYMTYPES] = { | |
2a6de314 PA |
84 | /* |
85 | * These symbols are known to be relative, even if the linker marks them | |
86 | * as absolute (typically defined outside any section in the linker script.) | |
87 | */ | |
88 | [S_REL] = | |
89 | "^pa_", | |
90 | ||
6520fe55 PA |
91 | /* |
92 | * These are 16-bit segment symbols when compiling 16-bit code. | |
93 | */ | |
94 | [S_SEG] = | |
95 | "^real_mode_seg$", | |
96 | ||
97 | /* | |
98 | * These are offsets belonging to segments, as opposed to linear addresses, | |
99 | * when compiling 16-bit code. | |
100 | */ | |
101 | [S_LIN] = | |
102 | "^pa_", | |
103 | }; | |
104 | ||
105 | static const char * const *sym_regex; | |
106 | ||
107 | static regex_t sym_regex_c[S_NSYMTYPES]; | |
108 | static int is_reloc(enum symtype type, const char *sym_name) | |
6a044b3a | 109 | { |
6520fe55 PA |
110 | return sym_regex[type] && |
111 | !regexec(&sym_regex_c[type], sym_name, 0, NULL, 0); | |
873b5271 | 112 | } |
6a044b3a | 113 | |
6520fe55 | 114 | static void regex_init(int use_real_mode) |
873b5271 PA |
115 | { |
116 | char errbuf[128]; | |
117 | int err; | |
6520fe55 | 118 | int i; |
873b5271 | 119 | |
6520fe55 PA |
120 | if (use_real_mode) |
121 | sym_regex = sym_regex_realmode; | |
122 | else | |
123 | sym_regex = sym_regex_kernel; | |
124 | ||
125 | for (i = 0; i < S_NSYMTYPES; i++) { | |
126 | if (!sym_regex[i]) | |
127 | continue; | |
128 | ||
129 | err = regcomp(&sym_regex_c[i], sym_regex[i], | |
130 | REG_EXTENDED|REG_NOSUB); | |
131 | ||
132 | if (err) { | |
0e96f31e | 133 | regerror(err, &sym_regex_c[i], errbuf, sizeof(errbuf)); |
6520fe55 PA |
134 | die("%s", errbuf); |
135 | } | |
873b5271 | 136 | } |
6a044b3a VG |
137 | } |
138 | ||
968de4f0 EB |
139 | static const char *sym_type(unsigned type) |
140 | { | |
141 | static const char *type_name[] = { | |
142 | #define SYM_TYPE(X) [X] = #X | |
143 | SYM_TYPE(STT_NOTYPE), | |
144 | SYM_TYPE(STT_OBJECT), | |
145 | SYM_TYPE(STT_FUNC), | |
146 | SYM_TYPE(STT_SECTION), | |
147 | SYM_TYPE(STT_FILE), | |
148 | SYM_TYPE(STT_COMMON), | |
149 | SYM_TYPE(STT_TLS), | |
150 | #undef SYM_TYPE | |
151 | }; | |
152 | const char *name = "unknown sym type name"; | |
ca820181 | 153 | if (type < ARRAY_SIZE(type_name)) { |
968de4f0 EB |
154 | name = type_name[type]; |
155 | } | |
156 | return name; | |
157 | } | |
158 | ||
159 | static const char *sym_bind(unsigned bind) | |
160 | { | |
161 | static const char *bind_name[] = { | |
162 | #define SYM_BIND(X) [X] = #X | |
163 | SYM_BIND(STB_LOCAL), | |
164 | SYM_BIND(STB_GLOBAL), | |
165 | SYM_BIND(STB_WEAK), | |
166 | #undef SYM_BIND | |
167 | }; | |
168 | const char *name = "unknown sym bind name"; | |
ca820181 | 169 | if (bind < ARRAY_SIZE(bind_name)) { |
968de4f0 EB |
170 | name = bind_name[bind]; |
171 | } | |
172 | return name; | |
173 | } | |
174 | ||
175 | static const char *sym_visibility(unsigned visibility) | |
176 | { | |
177 | static const char *visibility_name[] = { | |
178 | #define SYM_VISIBILITY(X) [X] = #X | |
179 | SYM_VISIBILITY(STV_DEFAULT), | |
180 | SYM_VISIBILITY(STV_INTERNAL), | |
181 | SYM_VISIBILITY(STV_HIDDEN), | |
182 | SYM_VISIBILITY(STV_PROTECTED), | |
183 | #undef SYM_VISIBILITY | |
184 | }; | |
185 | const char *name = "unknown sym visibility name"; | |
ca820181 | 186 | if (visibility < ARRAY_SIZE(visibility_name)) { |
968de4f0 EB |
187 | name = visibility_name[visibility]; |
188 | } | |
189 | return name; | |
190 | } | |
191 | ||
192 | static const char *rel_type(unsigned type) | |
193 | { | |
194 | static const char *type_name[] = { | |
195 | #define REL_TYPE(X) [X] = #X | |
c889ba80 | 196 | #if ELF_BITS == 64 |
946166af KC |
197 | REL_TYPE(R_X86_64_NONE), |
198 | REL_TYPE(R_X86_64_64), | |
b40a142b | 199 | REL_TYPE(R_X86_64_PC64), |
946166af KC |
200 | REL_TYPE(R_X86_64_PC32), |
201 | REL_TYPE(R_X86_64_GOT32), | |
202 | REL_TYPE(R_X86_64_PLT32), | |
203 | REL_TYPE(R_X86_64_COPY), | |
204 | REL_TYPE(R_X86_64_GLOB_DAT), | |
205 | REL_TYPE(R_X86_64_JUMP_SLOT), | |
206 | REL_TYPE(R_X86_64_RELATIVE), | |
207 | REL_TYPE(R_X86_64_GOTPCREL), | |
208 | REL_TYPE(R_X86_64_32), | |
209 | REL_TYPE(R_X86_64_32S), | |
210 | REL_TYPE(R_X86_64_16), | |
211 | REL_TYPE(R_X86_64_PC16), | |
212 | REL_TYPE(R_X86_64_8), | |
213 | REL_TYPE(R_X86_64_PC8), | |
214 | #else | |
968de4f0 EB |
215 | REL_TYPE(R_386_NONE), |
216 | REL_TYPE(R_386_32), | |
217 | REL_TYPE(R_386_PC32), | |
218 | REL_TYPE(R_386_GOT32), | |
219 | REL_TYPE(R_386_PLT32), | |
220 | REL_TYPE(R_386_COPY), | |
221 | REL_TYPE(R_386_GLOB_DAT), | |
222 | REL_TYPE(R_386_JMP_SLOT), | |
223 | REL_TYPE(R_386_RELATIVE), | |
224 | REL_TYPE(R_386_GOTOFF), | |
225 | REL_TYPE(R_386_GOTPC), | |
6520fe55 PA |
226 | REL_TYPE(R_386_8), |
227 | REL_TYPE(R_386_PC8), | |
228 | REL_TYPE(R_386_16), | |
229 | REL_TYPE(R_386_PC16), | |
946166af | 230 | #endif |
968de4f0 EB |
231 | #undef REL_TYPE |
232 | }; | |
233 | const char *name = "unknown type rel type name"; | |
873b5271 | 234 | if (type < ARRAY_SIZE(type_name) && type_name[type]) { |
968de4f0 EB |
235 | name = type_name[type]; |
236 | } | |
237 | return name; | |
238 | } | |
239 | ||
240 | static const char *sec_name(unsigned shndx) | |
241 | { | |
242 | const char *sec_strtab; | |
243 | const char *name; | |
908ec7af | 244 | sec_strtab = secs[ehdr.e_shstrndx].strtab; |
968de4f0 EB |
245 | name = "<noname>"; |
246 | if (shndx < ehdr.e_shnum) { | |
908ec7af | 247 | name = sec_strtab + secs[shndx].shdr.sh_name; |
968de4f0 EB |
248 | } |
249 | else if (shndx == SHN_ABS) { | |
250 | name = "ABSOLUTE"; | |
251 | } | |
252 | else if (shndx == SHN_COMMON) { | |
253 | name = "COMMON"; | |
254 | } | |
255 | return name; | |
256 | } | |
257 | ||
bf11655c | 258 | static const char *sym_name(const char *sym_strtab, Elf_Sym *sym) |
968de4f0 EB |
259 | { |
260 | const char *name; | |
261 | name = "<noname>"; | |
262 | if (sym->st_name) { | |
263 | name = sym_strtab + sym->st_name; | |
264 | } | |
265 | else { | |
6520fe55 | 266 | name = sec_name(sym->st_shndx); |
968de4f0 EB |
267 | } |
268 | return name; | |
269 | } | |
270 | ||
946166af KC |
271 | static Elf_Sym *sym_lookup(const char *symname) |
272 | { | |
273 | int i; | |
274 | for (i = 0; i < ehdr.e_shnum; i++) { | |
275 | struct section *sec = &secs[i]; | |
276 | long nsyms; | |
277 | char *strtab; | |
278 | Elf_Sym *symtab; | |
279 | Elf_Sym *sym; | |
968de4f0 | 280 | |
946166af KC |
281 | if (sec->shdr.sh_type != SHT_SYMTAB) |
282 | continue; | |
283 | ||
284 | nsyms = sec->shdr.sh_size/sizeof(Elf_Sym); | |
285 | symtab = sec->symtab; | |
286 | strtab = sec->link->strtab; | |
287 | ||
288 | for (sym = symtab; --nsyms >= 0; sym++) { | |
289 | if (!sym->st_name) | |
290 | continue; | |
291 | if (strcmp(symname, strtab + sym->st_name) == 0) | |
292 | return sym; | |
293 | } | |
294 | } | |
295 | return 0; | |
296 | } | |
968de4f0 | 297 | |
13da9e20 | 298 | #if BYTE_ORDER == LITTLE_ENDIAN |
968de4f0 EB |
299 | #define le16_to_cpu(val) (val) |
300 | #define le32_to_cpu(val) (val) | |
946166af | 301 | #define le64_to_cpu(val) (val) |
968de4f0 | 302 | #endif |
13da9e20 | 303 | #if BYTE_ORDER == BIG_ENDIAN |
968de4f0 EB |
304 | #define le16_to_cpu(val) bswap_16(val) |
305 | #define le32_to_cpu(val) bswap_32(val) | |
946166af | 306 | #define le64_to_cpu(val) bswap_64(val) |
968de4f0 EB |
307 | #endif |
308 | ||
309 | static uint16_t elf16_to_cpu(uint16_t val) | |
310 | { | |
311 | return le16_to_cpu(val); | |
312 | } | |
313 | ||
314 | static uint32_t elf32_to_cpu(uint32_t val) | |
315 | { | |
316 | return le32_to_cpu(val); | |
317 | } | |
318 | ||
bf11655c KC |
319 | #define elf_half_to_cpu(x) elf16_to_cpu(x) |
320 | #define elf_word_to_cpu(x) elf32_to_cpu(x) | |
946166af | 321 | |
c889ba80 | 322 | #if ELF_BITS == 64 |
946166af KC |
323 | static uint64_t elf64_to_cpu(uint64_t val) |
324 | { | |
325 | return le64_to_cpu(val); | |
326 | } | |
327 | #define elf_addr_to_cpu(x) elf64_to_cpu(x) | |
328 | #define elf_off_to_cpu(x) elf64_to_cpu(x) | |
329 | #define elf_xword_to_cpu(x) elf64_to_cpu(x) | |
330 | #else | |
bf11655c KC |
331 | #define elf_addr_to_cpu(x) elf32_to_cpu(x) |
332 | #define elf_off_to_cpu(x) elf32_to_cpu(x) | |
333 | #define elf_xword_to_cpu(x) elf32_to_cpu(x) | |
946166af | 334 | #endif |
bf11655c | 335 | |
968de4f0 EB |
336 | static void read_ehdr(FILE *fp) |
337 | { | |
338 | if (fread(&ehdr, sizeof(ehdr), 1, fp) != 1) { | |
339 | die("Cannot read ELF header: %s\n", | |
340 | strerror(errno)); | |
341 | } | |
8bd1796d | 342 | if (memcmp(ehdr.e_ident, ELFMAG, SELFMAG) != 0) { |
968de4f0 EB |
343 | die("No ELF magic\n"); |
344 | } | |
bf11655c KC |
345 | if (ehdr.e_ident[EI_CLASS] != ELF_CLASS) { |
346 | die("Not a %d bit executable\n", ELF_BITS); | |
968de4f0 EB |
347 | } |
348 | if (ehdr.e_ident[EI_DATA] != ELFDATA2LSB) { | |
349 | die("Not a LSB ELF executable\n"); | |
350 | } | |
351 | if (ehdr.e_ident[EI_VERSION] != EV_CURRENT) { | |
352 | die("Unknown ELF version\n"); | |
353 | } | |
354 | /* Convert the fields to native endian */ | |
bf11655c KC |
355 | ehdr.e_type = elf_half_to_cpu(ehdr.e_type); |
356 | ehdr.e_machine = elf_half_to_cpu(ehdr.e_machine); | |
357 | ehdr.e_version = elf_word_to_cpu(ehdr.e_version); | |
358 | ehdr.e_entry = elf_addr_to_cpu(ehdr.e_entry); | |
359 | ehdr.e_phoff = elf_off_to_cpu(ehdr.e_phoff); | |
360 | ehdr.e_shoff = elf_off_to_cpu(ehdr.e_shoff); | |
361 | ehdr.e_flags = elf_word_to_cpu(ehdr.e_flags); | |
362 | ehdr.e_ehsize = elf_half_to_cpu(ehdr.e_ehsize); | |
363 | ehdr.e_phentsize = elf_half_to_cpu(ehdr.e_phentsize); | |
364 | ehdr.e_phnum = elf_half_to_cpu(ehdr.e_phnum); | |
365 | ehdr.e_shentsize = elf_half_to_cpu(ehdr.e_shentsize); | |
366 | ehdr.e_shnum = elf_half_to_cpu(ehdr.e_shnum); | |
367 | ehdr.e_shstrndx = elf_half_to_cpu(ehdr.e_shstrndx); | |
968de4f0 EB |
368 | |
369 | if ((ehdr.e_type != ET_EXEC) && (ehdr.e_type != ET_DYN)) { | |
370 | die("Unsupported ELF header type\n"); | |
371 | } | |
bf11655c KC |
372 | if (ehdr.e_machine != ELF_MACHINE) { |
373 | die("Not for %s\n", ELF_MACHINE_NAME); | |
968de4f0 EB |
374 | } |
375 | if (ehdr.e_version != EV_CURRENT) { | |
376 | die("Unknown ELF version\n"); | |
377 | } | |
bf11655c | 378 | if (ehdr.e_ehsize != sizeof(Elf_Ehdr)) { |
968de4f0 EB |
379 | die("Bad Elf header size\n"); |
380 | } | |
bf11655c | 381 | if (ehdr.e_phentsize != sizeof(Elf_Phdr)) { |
968de4f0 EB |
382 | die("Bad program header entry\n"); |
383 | } | |
bf11655c | 384 | if (ehdr.e_shentsize != sizeof(Elf_Shdr)) { |
968de4f0 EB |
385 | die("Bad section header entry\n"); |
386 | } | |
387 | if (ehdr.e_shstrndx >= ehdr.e_shnum) { | |
388 | die("String table index out of bounds\n"); | |
389 | } | |
390 | } | |
391 | ||
392 | static void read_shdrs(FILE *fp) | |
393 | { | |
394 | int i; | |
bf11655c | 395 | Elf_Shdr shdr; |
908ec7af PA |
396 | |
397 | secs = calloc(ehdr.e_shnum, sizeof(struct section)); | |
398 | if (!secs) { | |
399 | die("Unable to allocate %d section headers\n", | |
400 | ehdr.e_shnum); | |
968de4f0 EB |
401 | } |
402 | if (fseek(fp, ehdr.e_shoff, SEEK_SET) < 0) { | |
403 | die("Seek to %d failed: %s\n", | |
404 | ehdr.e_shoff, strerror(errno)); | |
405 | } | |
908ec7af PA |
406 | for (i = 0; i < ehdr.e_shnum; i++) { |
407 | struct section *sec = &secs[i]; | |
0e96f31e | 408 | if (fread(&shdr, sizeof(shdr), 1, fp) != 1) |
908ec7af PA |
409 | die("Cannot read ELF section headers %d/%d: %s\n", |
410 | i, ehdr.e_shnum, strerror(errno)); | |
bf11655c KC |
411 | sec->shdr.sh_name = elf_word_to_cpu(shdr.sh_name); |
412 | sec->shdr.sh_type = elf_word_to_cpu(shdr.sh_type); | |
413 | sec->shdr.sh_flags = elf_xword_to_cpu(shdr.sh_flags); | |
414 | sec->shdr.sh_addr = elf_addr_to_cpu(shdr.sh_addr); | |
415 | sec->shdr.sh_offset = elf_off_to_cpu(shdr.sh_offset); | |
416 | sec->shdr.sh_size = elf_xword_to_cpu(shdr.sh_size); | |
417 | sec->shdr.sh_link = elf_word_to_cpu(shdr.sh_link); | |
418 | sec->shdr.sh_info = elf_word_to_cpu(shdr.sh_info); | |
419 | sec->shdr.sh_addralign = elf_xword_to_cpu(shdr.sh_addralign); | |
420 | sec->shdr.sh_entsize = elf_xword_to_cpu(shdr.sh_entsize); | |
908ec7af PA |
421 | if (sec->shdr.sh_link < ehdr.e_shnum) |
422 | sec->link = &secs[sec->shdr.sh_link]; | |
968de4f0 EB |
423 | } |
424 | ||
425 | } | |
426 | ||
427 | static void read_strtabs(FILE *fp) | |
428 | { | |
429 | int i; | |
908ec7af PA |
430 | for (i = 0; i < ehdr.e_shnum; i++) { |
431 | struct section *sec = &secs[i]; | |
432 | if (sec->shdr.sh_type != SHT_STRTAB) { | |
968de4f0 EB |
433 | continue; |
434 | } | |
908ec7af PA |
435 | sec->strtab = malloc(sec->shdr.sh_size); |
436 | if (!sec->strtab) { | |
968de4f0 | 437 | die("malloc of %d bytes for strtab failed\n", |
908ec7af | 438 | sec->shdr.sh_size); |
968de4f0 | 439 | } |
908ec7af | 440 | if (fseek(fp, sec->shdr.sh_offset, SEEK_SET) < 0) { |
968de4f0 | 441 | die("Seek to %d failed: %s\n", |
908ec7af | 442 | sec->shdr.sh_offset, strerror(errno)); |
968de4f0 | 443 | } |
908ec7af PA |
444 | if (fread(sec->strtab, 1, sec->shdr.sh_size, fp) |
445 | != sec->shdr.sh_size) { | |
968de4f0 EB |
446 | die("Cannot read symbol table: %s\n", |
447 | strerror(errno)); | |
448 | } | |
449 | } | |
450 | } | |
451 | ||
452 | static void read_symtabs(FILE *fp) | |
453 | { | |
454 | int i,j; | |
908ec7af PA |
455 | for (i = 0; i < ehdr.e_shnum; i++) { |
456 | struct section *sec = &secs[i]; | |
457 | if (sec->shdr.sh_type != SHT_SYMTAB) { | |
968de4f0 EB |
458 | continue; |
459 | } | |
908ec7af PA |
460 | sec->symtab = malloc(sec->shdr.sh_size); |
461 | if (!sec->symtab) { | |
968de4f0 | 462 | die("malloc of %d bytes for symtab failed\n", |
908ec7af | 463 | sec->shdr.sh_size); |
968de4f0 | 464 | } |
908ec7af | 465 | if (fseek(fp, sec->shdr.sh_offset, SEEK_SET) < 0) { |
968de4f0 | 466 | die("Seek to %d failed: %s\n", |
908ec7af | 467 | sec->shdr.sh_offset, strerror(errno)); |
968de4f0 | 468 | } |
908ec7af PA |
469 | if (fread(sec->symtab, 1, sec->shdr.sh_size, fp) |
470 | != sec->shdr.sh_size) { | |
968de4f0 EB |
471 | die("Cannot read symbol table: %s\n", |
472 | strerror(errno)); | |
473 | } | |
bf11655c KC |
474 | for (j = 0; j < sec->shdr.sh_size/sizeof(Elf_Sym); j++) { |
475 | Elf_Sym *sym = &sec->symtab[j]; | |
476 | sym->st_name = elf_word_to_cpu(sym->st_name); | |
477 | sym->st_value = elf_addr_to_cpu(sym->st_value); | |
478 | sym->st_size = elf_xword_to_cpu(sym->st_size); | |
479 | sym->st_shndx = elf_half_to_cpu(sym->st_shndx); | |
968de4f0 EB |
480 | } |
481 | } | |
482 | } | |
483 | ||
484 | ||
485 | static void read_relocs(FILE *fp) | |
486 | { | |
487 | int i,j; | |
908ec7af PA |
488 | for (i = 0; i < ehdr.e_shnum; i++) { |
489 | struct section *sec = &secs[i]; | |
bf11655c | 490 | if (sec->shdr.sh_type != SHT_REL_TYPE) { |
968de4f0 EB |
491 | continue; |
492 | } | |
908ec7af PA |
493 | sec->reltab = malloc(sec->shdr.sh_size); |
494 | if (!sec->reltab) { | |
968de4f0 | 495 | die("malloc of %d bytes for relocs failed\n", |
908ec7af | 496 | sec->shdr.sh_size); |
968de4f0 | 497 | } |
908ec7af | 498 | if (fseek(fp, sec->shdr.sh_offset, SEEK_SET) < 0) { |
968de4f0 | 499 | die("Seek to %d failed: %s\n", |
908ec7af | 500 | sec->shdr.sh_offset, strerror(errno)); |
968de4f0 | 501 | } |
908ec7af PA |
502 | if (fread(sec->reltab, 1, sec->shdr.sh_size, fp) |
503 | != sec->shdr.sh_size) { | |
968de4f0 EB |
504 | die("Cannot read symbol table: %s\n", |
505 | strerror(errno)); | |
506 | } | |
bf11655c KC |
507 | for (j = 0; j < sec->shdr.sh_size/sizeof(Elf_Rel); j++) { |
508 | Elf_Rel *rel = &sec->reltab[j]; | |
509 | rel->r_offset = elf_addr_to_cpu(rel->r_offset); | |
510 | rel->r_info = elf_xword_to_cpu(rel->r_info); | |
946166af KC |
511 | #if (SHT_REL_TYPE == SHT_RELA) |
512 | rel->r_addend = elf_xword_to_cpu(rel->r_addend); | |
513 | #endif | |
968de4f0 EB |
514 | } |
515 | } | |
516 | } | |
517 | ||
518 | ||
519 | static void print_absolute_symbols(void) | |
520 | { | |
521 | int i; | |
946166af KC |
522 | const char *format; |
523 | ||
c889ba80 | 524 | if (ELF_BITS == 64) |
946166af KC |
525 | format = "%5d %016"PRIx64" %5"PRId64" %10s %10s %12s %s\n"; |
526 | else | |
527 | format = "%5d %08"PRIx32" %5"PRId32" %10s %10s %12s %s\n"; | |
528 | ||
968de4f0 EB |
529 | printf("Absolute symbols\n"); |
530 | printf(" Num: Value Size Type Bind Visibility Name\n"); | |
908ec7af PA |
531 | for (i = 0; i < ehdr.e_shnum; i++) { |
532 | struct section *sec = &secs[i]; | |
968de4f0 | 533 | char *sym_strtab; |
968de4f0 | 534 | int j; |
908ec7af PA |
535 | |
536 | if (sec->shdr.sh_type != SHT_SYMTAB) { | |
968de4f0 EB |
537 | continue; |
538 | } | |
908ec7af | 539 | sym_strtab = sec->link->strtab; |
bf11655c KC |
540 | for (j = 0; j < sec->shdr.sh_size/sizeof(Elf_Sym); j++) { |
541 | Elf_Sym *sym; | |
968de4f0 | 542 | const char *name; |
908ec7af | 543 | sym = &sec->symtab[j]; |
968de4f0 EB |
544 | name = sym_name(sym_strtab, sym); |
545 | if (sym->st_shndx != SHN_ABS) { | |
546 | continue; | |
547 | } | |
946166af | 548 | printf(format, |
968de4f0 | 549 | j, sym->st_value, sym->st_size, |
bf11655c KC |
550 | sym_type(ELF_ST_TYPE(sym->st_info)), |
551 | sym_bind(ELF_ST_BIND(sym->st_info)), | |
552 | sym_visibility(ELF_ST_VISIBILITY(sym->st_other)), | |
968de4f0 EB |
553 | name); |
554 | } | |
555 | } | |
556 | printf("\n"); | |
557 | } | |
558 | ||
559 | static void print_absolute_relocs(void) | |
560 | { | |
6a044b3a | 561 | int i, printed = 0; |
946166af KC |
562 | const char *format; |
563 | ||
c889ba80 | 564 | if (ELF_BITS == 64) |
946166af KC |
565 | format = "%016"PRIx64" %016"PRIx64" %10s %016"PRIx64" %s\n"; |
566 | else | |
567 | format = "%08"PRIx32" %08"PRIx32" %10s %08"PRIx32" %s\n"; | |
6a044b3a | 568 | |
908ec7af PA |
569 | for (i = 0; i < ehdr.e_shnum; i++) { |
570 | struct section *sec = &secs[i]; | |
571 | struct section *sec_applies, *sec_symtab; | |
968de4f0 | 572 | char *sym_strtab; |
bf11655c | 573 | Elf_Sym *sh_symtab; |
968de4f0 | 574 | int j; |
bf11655c | 575 | if (sec->shdr.sh_type != SHT_REL_TYPE) { |
968de4f0 EB |
576 | continue; |
577 | } | |
908ec7af PA |
578 | sec_symtab = sec->link; |
579 | sec_applies = &secs[sec->shdr.sh_info]; | |
580 | if (!(sec_applies->shdr.sh_flags & SHF_ALLOC)) { | |
968de4f0 EB |
581 | continue; |
582 | } | |
908ec7af PA |
583 | sh_symtab = sec_symtab->symtab; |
584 | sym_strtab = sec_symtab->link->strtab; | |
bf11655c KC |
585 | for (j = 0; j < sec->shdr.sh_size/sizeof(Elf_Rel); j++) { |
586 | Elf_Rel *rel; | |
587 | Elf_Sym *sym; | |
968de4f0 | 588 | const char *name; |
908ec7af | 589 | rel = &sec->reltab[j]; |
bf11655c | 590 | sym = &sh_symtab[ELF_R_SYM(rel->r_info)]; |
968de4f0 EB |
591 | name = sym_name(sym_strtab, sym); |
592 | if (sym->st_shndx != SHN_ABS) { | |
593 | continue; | |
594 | } | |
6a044b3a VG |
595 | |
596 | /* Absolute symbols are not relocated if bzImage is | |
597 | * loaded at a non-compiled address. Display a warning | |
598 | * to user at compile time about the absolute | |
599 | * relocations present. | |
600 | * | |
601 | * User need to audit the code to make sure | |
602 | * some symbols which should have been section | |
603 | * relative have not become absolute because of some | |
604 | * linker optimization or wrong programming usage. | |
605 | * | |
606 | * Before warning check if this absolute symbol | |
607 | * relocation is harmless. | |
608 | */ | |
6520fe55 | 609 | if (is_reloc(S_ABS, name) || is_reloc(S_REL, name)) |
6a044b3a VG |
610 | continue; |
611 | ||
612 | if (!printed) { | |
613 | printf("WARNING: Absolute relocations" | |
614 | " present\n"); | |
615 | printf("Offset Info Type Sym.Value " | |
616 | "Sym.Name\n"); | |
617 | printed = 1; | |
618 | } | |
619 | ||
946166af | 620 | printf(format, |
968de4f0 EB |
621 | rel->r_offset, |
622 | rel->r_info, | |
bf11655c | 623 | rel_type(ELF_R_TYPE(rel->r_info)), |
968de4f0 EB |
624 | sym->st_value, |
625 | name); | |
626 | } | |
627 | } | |
6a044b3a VG |
628 | |
629 | if (printed) | |
630 | printf("\n"); | |
968de4f0 EB |
631 | } |
632 | ||
5d442e63 KC |
633 | static void add_reloc(struct relocs *r, uint32_t offset) |
634 | { | |
635 | if (r->count == r->size) { | |
636 | unsigned long newsize = r->size + 50000; | |
637 | void *mem = realloc(r->offset, newsize * sizeof(r->offset[0])); | |
638 | ||
639 | if (!mem) | |
640 | die("realloc of %ld entries for relocs failed\n", | |
641 | newsize); | |
642 | r->offset = mem; | |
643 | r->size = newsize; | |
644 | } | |
645 | r->offset[r->count++] = offset; | |
646 | } | |
647 | ||
648 | static void walk_relocs(int (*process)(struct section *sec, Elf_Rel *rel, | |
649 | Elf_Sym *sym, const char *symname)) | |
968de4f0 EB |
650 | { |
651 | int i; | |
652 | /* Walk through the relocations */ | |
908ec7af | 653 | for (i = 0; i < ehdr.e_shnum; i++) { |
968de4f0 | 654 | char *sym_strtab; |
bf11655c | 655 | Elf_Sym *sh_symtab; |
908ec7af | 656 | struct section *sec_applies, *sec_symtab; |
968de4f0 | 657 | int j; |
908ec7af PA |
658 | struct section *sec = &secs[i]; |
659 | ||
bf11655c | 660 | if (sec->shdr.sh_type != SHT_REL_TYPE) { |
968de4f0 EB |
661 | continue; |
662 | } | |
908ec7af PA |
663 | sec_symtab = sec->link; |
664 | sec_applies = &secs[sec->shdr.sh_info]; | |
665 | if (!(sec_applies->shdr.sh_flags & SHF_ALLOC)) { | |
968de4f0 EB |
666 | continue; |
667 | } | |
908ec7af | 668 | sh_symtab = sec_symtab->symtab; |
cc65f1ec | 669 | sym_strtab = sec_symtab->link->strtab; |
bf11655c | 670 | for (j = 0; j < sec->shdr.sh_size/sizeof(Elf_Rel); j++) { |
5d442e63 KC |
671 | Elf_Rel *rel = &sec->reltab[j]; |
672 | Elf_Sym *sym = &sh_symtab[ELF_R_SYM(rel->r_info)]; | |
673 | const char *symname = sym_name(sym_strtab, sym); | |
24ab82bd | 674 | |
5d442e63 KC |
675 | process(sec, rel, sym, symname); |
676 | } | |
677 | } | |
678 | } | |
679 | ||
946166af KC |
680 | /* |
681 | * The .data..percpu section is a special case for x86_64 SMP kernels. | |
682 | * It is used to initialize the actual per_cpu areas and to provide | |
683 | * definitions for the per_cpu variables that correspond to their offsets | |
684 | * within the percpu area. Since the values of all of the symbols need | |
685 | * to be offsets from the start of the per_cpu area the virtual address | |
686 | * (sh_addr) of .data..percpu is 0 in SMP kernels. | |
687 | * | |
688 | * This means that: | |
689 | * | |
690 | * Relocations that reference symbols in the per_cpu area do not | |
691 | * need further relocation (since the value is an offset relative | |
692 | * to the start of the per_cpu area that does not change). | |
693 | * | |
694 | * Relocations that apply to the per_cpu area need to have their | |
695 | * offset adjusted by by the value of __per_cpu_load to make them | |
696 | * point to the correct place in the loaded image (because the | |
697 | * virtual address of .data..percpu is 0). | |
698 | * | |
699 | * For non SMP kernels .data..percpu is linked as part of the normal | |
700 | * kernel data and does not require special treatment. | |
701 | * | |
702 | */ | |
703 | static int per_cpu_shndx = -1; | |
eeeda4cd | 704 | static Elf_Addr per_cpu_load_addr; |
946166af KC |
705 | |
706 | static void percpu_init(void) | |
707 | { | |
708 | int i; | |
709 | for (i = 0; i < ehdr.e_shnum; i++) { | |
710 | ElfW(Sym) *sym; | |
711 | if (strcmp(sec_name(i), ".data..percpu")) | |
712 | continue; | |
713 | ||
714 | if (secs[i].shdr.sh_addr != 0) /* non SMP kernel */ | |
715 | return; | |
716 | ||
717 | sym = sym_lookup("__per_cpu_load"); | |
718 | if (!sym) | |
719 | die("can't find __per_cpu_load\n"); | |
720 | ||
721 | per_cpu_shndx = i; | |
722 | per_cpu_load_addr = sym->st_value; | |
723 | return; | |
724 | } | |
725 | } | |
726 | ||
c889ba80 PA |
727 | #if ELF_BITS == 64 |
728 | ||
946166af KC |
729 | /* |
730 | * Check to see if a symbol lies in the .data..percpu section. | |
d751c169 MD |
731 | * |
732 | * The linker incorrectly associates some symbols with the | |
733 | * .data..percpu section so we also need to check the symbol | |
734 | * name to make sure that we classify the symbol correctly. | |
735 | * | |
736 | * The GNU linker incorrectly associates: | |
737 | * __init_begin | |
aec58baf | 738 | * __per_cpu_load |
d751c169 MD |
739 | * |
740 | * The "gold" linker incorrectly associates: | |
e6401c13 | 741 | * init_per_cpu__fixed_percpu_data |
d751c169 | 742 | * init_per_cpu__gdt_page |
946166af KC |
743 | */ |
744 | static int is_percpu_sym(ElfW(Sym) *sym, const char *symname) | |
745 | { | |
746 | return (sym->st_shndx == per_cpu_shndx) && | |
d751c169 | 747 | strcmp(symname, "__init_begin") && |
aec58baf | 748 | strcmp(symname, "__per_cpu_load") && |
d751c169 | 749 | strncmp(symname, "init_per_cpu_", 13); |
946166af KC |
750 | } |
751 | ||
c889ba80 | 752 | |
946166af KC |
753 | static int do_reloc64(struct section *sec, Elf_Rel *rel, ElfW(Sym) *sym, |
754 | const char *symname) | |
755 | { | |
756 | unsigned r_type = ELF64_R_TYPE(rel->r_info); | |
757 | ElfW(Addr) offset = rel->r_offset; | |
758 | int shn_abs = (sym->st_shndx == SHN_ABS) && !is_reloc(S_REL, symname); | |
759 | ||
760 | if (sym->st_shndx == SHN_UNDEF) | |
761 | return 0; | |
762 | ||
763 | /* | |
764 | * Adjust the offset if this reloc applies to the percpu section. | |
765 | */ | |
766 | if (sec->shdr.sh_info == per_cpu_shndx) | |
767 | offset += per_cpu_load_addr; | |
768 | ||
769 | switch (r_type) { | |
770 | case R_X86_64_NONE: | |
6d24c5f7 JB |
771 | /* NONE can be ignored. */ |
772 | break; | |
773 | ||
946166af | 774 | case R_X86_64_PC32: |
b21ebf2f | 775 | case R_X86_64_PLT32: |
946166af | 776 | /* |
6d24c5f7 JB |
777 | * PC relative relocations don't need to be adjusted unless |
778 | * referencing a percpu symbol. | |
b21ebf2f L |
779 | * |
780 | * NB: R_X86_64_PLT32 can be treated as R_X86_64_PC32. | |
946166af | 781 | */ |
6d24c5f7 JB |
782 | if (is_percpu_sym(sym, symname)) |
783 | add_reloc(&relocs32neg, offset); | |
946166af KC |
784 | break; |
785 | ||
b40a142b AB |
786 | case R_X86_64_PC64: |
787 | /* | |
788 | * Only used by jump labels | |
789 | */ | |
790 | if (is_percpu_sym(sym, symname)) | |
791 | die("Invalid R_X86_64_PC64 relocation against per-CPU symbol %s\n", | |
792 | symname); | |
793 | break; | |
794 | ||
946166af KC |
795 | case R_X86_64_32: |
796 | case R_X86_64_32S: | |
797 | case R_X86_64_64: | |
798 | /* | |
799 | * References to the percpu area don't need to be adjusted. | |
800 | */ | |
801 | if (is_percpu_sym(sym, symname)) | |
802 | break; | |
803 | ||
804 | if (shn_abs) { | |
805 | /* | |
806 | * Whitelisted absolute symbols do not require | |
807 | * relocation. | |
808 | */ | |
809 | if (is_reloc(S_ABS, symname)) | |
810 | break; | |
811 | ||
812 | die("Invalid absolute %s relocation: %s\n", | |
813 | rel_type(r_type), symname); | |
814 | break; | |
815 | } | |
816 | ||
817 | /* | |
818 | * Relocation offsets for 64 bit kernels are output | |
819 | * as 32 bits and sign extended back to 64 bits when | |
820 | * the relocations are processed. | |
821 | * Make sure that the offset will fit. | |
822 | */ | |
823 | if ((int32_t)offset != (int64_t)offset) | |
824 | die("Relocation offset doesn't fit in 32 bits\n"); | |
825 | ||
826 | if (r_type == R_X86_64_64) | |
827 | add_reloc(&relocs64, offset); | |
828 | else | |
829 | add_reloc(&relocs32, offset); | |
830 | break; | |
831 | ||
832 | default: | |
833 | die("Unsupported relocation type: %s (%d)\n", | |
834 | rel_type(r_type), r_type); | |
835 | break; | |
836 | } | |
837 | ||
838 | return 0; | |
839 | } | |
840 | ||
c889ba80 | 841 | #else |
946166af KC |
842 | |
843 | static int do_reloc32(struct section *sec, Elf_Rel *rel, Elf_Sym *sym, | |
844 | const char *symname) | |
5d442e63 KC |
845 | { |
846 | unsigned r_type = ELF32_R_TYPE(rel->r_info); | |
847 | int shn_abs = (sym->st_shndx == SHN_ABS) && !is_reloc(S_REL, symname); | |
848 | ||
849 | switch (r_type) { | |
850 | case R_386_NONE: | |
851 | case R_386_PC32: | |
852 | case R_386_PC16: | |
853 | case R_386_PC8: | |
854 | /* | |
855 | * NONE can be ignored and PC relative relocations don't | |
856 | * need to be adjusted. | |
857 | */ | |
858 | break; | |
859 | ||
860 | case R_386_32: | |
861 | if (shn_abs) { | |
862 | /* | |
863 | * Whitelisted absolute symbols do not require | |
864 | * relocation. | |
865 | */ | |
866 | if (is_reloc(S_ABS, symname)) | |
873b5271 | 867 | break; |
6520fe55 | 868 | |
5d442e63 KC |
869 | die("Invalid absolute %s relocation: %s\n", |
870 | rel_type(r_type), symname); | |
871 | break; | |
872 | } | |
873 | ||
874 | add_reloc(&relocs32, rel->r_offset); | |
875 | break; | |
876 | ||
877 | default: | |
878 | die("Unsupported relocation type: %s (%d)\n", | |
879 | rel_type(r_type), r_type); | |
880 | break; | |
881 | } | |
882 | ||
883 | return 0; | |
884 | } | |
885 | ||
886 | static int do_reloc_real(struct section *sec, Elf_Rel *rel, Elf_Sym *sym, | |
887 | const char *symname) | |
888 | { | |
889 | unsigned r_type = ELF32_R_TYPE(rel->r_info); | |
890 | int shn_abs = (sym->st_shndx == SHN_ABS) && !is_reloc(S_REL, symname); | |
891 | ||
892 | switch (r_type) { | |
893 | case R_386_NONE: | |
894 | case R_386_PC32: | |
895 | case R_386_PC16: | |
896 | case R_386_PC8: | |
897 | /* | |
898 | * NONE can be ignored and PC relative relocations don't | |
899 | * need to be adjusted. | |
900 | */ | |
901 | break; | |
902 | ||
903 | case R_386_16: | |
904 | if (shn_abs) { | |
905 | /* | |
906 | * Whitelisted absolute symbols do not require | |
907 | * relocation. | |
908 | */ | |
909 | if (is_reloc(S_ABS, symname)) | |
6520fe55 PA |
910 | break; |
911 | ||
5d442e63 KC |
912 | if (is_reloc(S_SEG, symname)) { |
913 | add_reloc(&relocs16, rel->r_offset); | |
914 | break; | |
915 | } | |
916 | } else { | |
917 | if (!is_reloc(S_LIN, symname)) | |
873b5271 | 918 | break; |
5d442e63 KC |
919 | } |
920 | die("Invalid %s %s relocation: %s\n", | |
921 | shn_abs ? "absolute" : "relative", | |
922 | rel_type(r_type), symname); | |
923 | break; | |
924 | ||
925 | case R_386_32: | |
926 | if (shn_abs) { | |
927 | /* | |
928 | * Whitelisted absolute symbols do not require | |
929 | * relocation. | |
930 | */ | |
931 | if (is_reloc(S_ABS, symname)) | |
932 | break; | |
933 | ||
934 | if (is_reloc(S_REL, symname)) { | |
935 | add_reloc(&relocs32, rel->r_offset); | |
873b5271 | 936 | break; |
968de4f0 | 937 | } |
5d442e63 KC |
938 | } else { |
939 | if (is_reloc(S_LIN, symname)) | |
940 | add_reloc(&relocs32, rel->r_offset); | |
941 | break; | |
968de4f0 | 942 | } |
5d442e63 KC |
943 | die("Invalid %s %s relocation: %s\n", |
944 | shn_abs ? "absolute" : "relative", | |
945 | rel_type(r_type), symname); | |
946 | break; | |
968de4f0 | 947 | |
5d442e63 KC |
948 | default: |
949 | die("Unsupported relocation type: %s (%d)\n", | |
950 | rel_type(r_type), r_type); | |
951 | break; | |
952 | } | |
968de4f0 | 953 | |
5d442e63 | 954 | return 0; |
968de4f0 EB |
955 | } |
956 | ||
c889ba80 PA |
957 | #endif |
958 | ||
968de4f0 EB |
959 | static int cmp_relocs(const void *va, const void *vb) |
960 | { | |
5d442e63 | 961 | const uint32_t *a, *b; |
968de4f0 EB |
962 | a = va; b = vb; |
963 | return (*a == *b)? 0 : (*a > *b)? 1 : -1; | |
964 | } | |
965 | ||
5d442e63 KC |
966 | static void sort_relocs(struct relocs *r) |
967 | { | |
968 | qsort(r->offset, r->count, sizeof(r->offset[0]), cmp_relocs); | |
969 | } | |
970 | ||
971 | static int write32(uint32_t v, FILE *f) | |
6520fe55 PA |
972 | { |
973 | unsigned char buf[4]; | |
974 | ||
975 | put_unaligned_le32(v, buf); | |
976 | return fwrite(buf, 1, 4, f) == 4 ? 0 : -1; | |
977 | } | |
978 | ||
5d442e63 KC |
979 | static int write32_as_text(uint32_t v, FILE *f) |
980 | { | |
981 | return fprintf(f, "\t.long 0x%08"PRIx32"\n", v) > 0 ? 0 : -1; | |
982 | } | |
983 | ||
6520fe55 | 984 | static void emit_relocs(int as_text, int use_real_mode) |
968de4f0 EB |
985 | { |
986 | int i; | |
5d442e63 | 987 | int (*write_reloc)(uint32_t, FILE *) = write32; |
946166af KC |
988 | int (*do_reloc)(struct section *sec, Elf_Rel *rel, Elf_Sym *sym, |
989 | const char *symname); | |
990 | ||
c889ba80 PA |
991 | #if ELF_BITS == 64 |
992 | if (!use_real_mode) | |
946166af | 993 | do_reloc = do_reloc64; |
c889ba80 PA |
994 | else |
995 | die("--realmode not valid for a 64-bit ELF file"); | |
996 | #else | |
997 | if (!use_real_mode) | |
946166af KC |
998 | do_reloc = do_reloc32; |
999 | else | |
1000 | do_reloc = do_reloc_real; | |
c889ba80 | 1001 | #endif |
6520fe55 | 1002 | |
968de4f0 | 1003 | /* Collect up the relocations */ |
946166af | 1004 | walk_relocs(do_reloc); |
6520fe55 | 1005 | |
5d442e63 | 1006 | if (relocs16.count && !use_real_mode) |
6520fe55 | 1007 | die("Segment relocations found but --realmode not specified\n"); |
968de4f0 EB |
1008 | |
1009 | /* Order the relocations for more efficient processing */ | |
5d442e63 | 1010 | sort_relocs(&relocs32); |
6d24c5f7 JB |
1011 | #if ELF_BITS == 64 |
1012 | sort_relocs(&relocs32neg); | |
946166af | 1013 | sort_relocs(&relocs64); |
7ebb9167 MT |
1014 | #else |
1015 | sort_relocs(&relocs16); | |
6d24c5f7 | 1016 | #endif |
968de4f0 EB |
1017 | |
1018 | /* Print the relocations */ | |
1019 | if (as_text) { | |
1020 | /* Print the relocations in a form suitable that | |
1021 | * gas will like. | |
1022 | */ | |
1023 | printf(".section \".data.reloc\",\"a\"\n"); | |
1024 | printf(".balign 4\n"); | |
5d442e63 | 1025 | write_reloc = write32_as_text; |
968de4f0 | 1026 | } |
6520fe55 | 1027 | |
5d442e63 KC |
1028 | if (use_real_mode) { |
1029 | write_reloc(relocs16.count, stdout); | |
1030 | for (i = 0; i < relocs16.count; i++) | |
1031 | write_reloc(relocs16.offset[i], stdout); | |
1032 | ||
1033 | write_reloc(relocs32.count, stdout); | |
1034 | for (i = 0; i < relocs32.count; i++) | |
1035 | write_reloc(relocs32.offset[i], stdout); | |
1036 | } else { | |
6d24c5f7 JB |
1037 | #if ELF_BITS == 64 |
1038 | /* Print a stop */ | |
1039 | write_reloc(0, stdout); | |
946166af | 1040 | |
6d24c5f7 JB |
1041 | /* Now print each relocation */ |
1042 | for (i = 0; i < relocs64.count; i++) | |
1043 | write_reloc(relocs64.offset[i], stdout); | |
1044 | ||
1045 | /* Print a stop */ | |
1046 | write_reloc(0, stdout); | |
1047 | ||
1048 | /* Now print each inverse 32-bit relocation */ | |
1049 | for (i = 0; i < relocs32neg.count; i++) | |
1050 | write_reloc(relocs32neg.offset[i], stdout); | |
1051 | #endif | |
946166af | 1052 | |
5d442e63 KC |
1053 | /* Print a stop */ |
1054 | write_reloc(0, stdout); | |
1055 | ||
1056 | /* Now print each relocation */ | |
1057 | for (i = 0; i < relocs32.count; i++) | |
1058 | write_reloc(relocs32.offset[i], stdout); | |
968de4f0 EB |
1059 | } |
1060 | } | |
1061 | ||
214a8876 MD |
1062 | /* |
1063 | * As an aid to debugging problems with different linkers | |
1064 | * print summary information about the relocs. | |
1065 | * Since different linkers tend to emit the sections in | |
1066 | * different orders we use the section names in the output. | |
1067 | */ | |
1068 | static int do_reloc_info(struct section *sec, Elf_Rel *rel, ElfW(Sym) *sym, | |
1069 | const char *symname) | |
1070 | { | |
1071 | printf("%s\t%s\t%s\t%s\n", | |
1072 | sec_name(sec->shdr.sh_info), | |
1073 | rel_type(ELF_R_TYPE(rel->r_info)), | |
1074 | symname, | |
1075 | sec_name(sym->st_shndx)); | |
1076 | return 0; | |
1077 | } | |
1078 | ||
1079 | static void print_reloc_info(void) | |
1080 | { | |
1081 | printf("reloc section\treloc type\tsymbol\tsymbol section\n"); | |
1082 | walk_relocs(do_reloc_info); | |
1083 | } | |
1084 | ||
c889ba80 PA |
1085 | #if ELF_BITS == 64 |
1086 | # define process process_64 | |
1087 | #else | |
1088 | # define process process_32 | |
1089 | #endif | |
968de4f0 | 1090 | |
c889ba80 | 1091 | void process(FILE *fp, int use_real_mode, int as_text, |
214a8876 MD |
1092 | int show_absolute_syms, int show_absolute_relocs, |
1093 | int show_reloc_info) | |
968de4f0 | 1094 | { |
6520fe55 | 1095 | regex_init(use_real_mode); |
968de4f0 EB |
1096 | read_ehdr(fp); |
1097 | read_shdrs(fp); | |
1098 | read_strtabs(fp); | |
1099 | read_symtabs(fp); | |
1100 | read_relocs(fp); | |
c889ba80 | 1101 | if (ELF_BITS == 64) |
946166af | 1102 | percpu_init(); |
6a044b3a | 1103 | if (show_absolute_syms) { |
968de4f0 | 1104 | print_absolute_symbols(); |
c889ba80 | 1105 | return; |
6a044b3a VG |
1106 | } |
1107 | if (show_absolute_relocs) { | |
968de4f0 | 1108 | print_absolute_relocs(); |
c889ba80 | 1109 | return; |
968de4f0 | 1110 | } |
214a8876 MD |
1111 | if (show_reloc_info) { |
1112 | print_reloc_info(); | |
1113 | return; | |
1114 | } | |
6520fe55 | 1115 | emit_relocs(as_text, use_real_mode); |
968de4f0 | 1116 | } |