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