Blame view
scripts/mod/modpost.c
55.1 KB
1da177e4c Linux-2.6.12-rc2 |
1 2 3 4 |
/* Postprocess module symbol versions * * Copyright 2003 Kai Germaschewski * Copyright 2002-2004 Rusty Russell, IBM Corporation |
df578e7d8 kbuild: clean up ... |
5 |
* Copyright 2006-2008 Sam Ravnborg |
1da177e4c Linux-2.6.12-rc2 |
6 7 8 9 10 11 12 |
* Based in part on module-init-tools/depmod.c,file2alias * * This software may be used and distributed according to the terms * of the GNU General Public License, incorporated herein by reference. * * Usage: modpost vmlinux module1.o module2.o ... */ |
b2e3e658b Linux Kernel Mark... |
13 14 |
#define _GNU_SOURCE #include <stdio.h> |
1da177e4c Linux-2.6.12-rc2 |
15 |
#include <ctype.h> |
5003bab82 fix "scripts/mod/... |
16 |
#include <string.h> |
1da177e4c Linux-2.6.12-rc2 |
17 |
#include "modpost.h" |
5a865c060 Merge branch 'for... |
18 |
#include "../../include/generated/autoconf.h" |
b817f6fef kbuild: check lic... |
19 |
#include "../../include/linux/license.h" |
1da177e4c Linux-2.6.12-rc2 |
20 |
|
9e1b9b807 module: make MODU... |
21 22 23 24 25 26 |
/* Some toolchains use a `_' prefix for all user symbols. */ #ifdef CONFIG_SYMBOL_PREFIX #define MODULE_SYMBOL_PREFIX CONFIG_SYMBOL_PREFIX #else #define MODULE_SYMBOL_PREFIX "" #endif |
1da177e4c Linux-2.6.12-rc2 |
27 28 29 30 31 32 |
/* Are we using CONFIG_MODVERSIONS? */ int modversions = 0; /* Warn about undefined symbols? (do so if we have vmlinux) */ int have_vmlinux = 0; /* Is CONFIG_MODULE_SRCVERSION_ALL set? */ static int all_versions = 0; |
040fcc819 kbuild: improved ... |
33 34 |
/* If we are modposting external module set to 1 */ static int external_module = 0; |
8d8d8289d kbuild: do not do... |
35 36 |
/* Warn about section mismatch in vmlinux if set to 1 */ static int vmlinux_section_warnings = 1; |
c53ddacdc kbuild: fail kern... |
37 38 |
/* Only warn about unresolved symbols */ static int warn_unresolved = 0; |
bd5cbcedf kbuild: export-ty... |
39 |
/* How a symbol is exported */ |
588ccd732 kbuild: add verbo... |
40 41 |
static int sec_mismatch_count = 0; static int sec_mismatch_verbose = 1; |
c96fca213 kbuild: warn when... |
42 43 44 45 |
enum export { export_plain, export_unused, export_gpl, export_unused_gpl, export_gpl_future, export_unknown }; |
1da177e4c Linux-2.6.12-rc2 |
46 |
|
6d9a89ea4 kbuild: declare t... |
47 48 49 |
#define PRINTF __attribute__ ((format (printf, 1, 2))) PRINTF void fatal(const char *fmt, ...) |
1da177e4c Linux-2.6.12-rc2 |
50 51 52 53 54 55 56 57 58 59 60 |
{ va_list arglist; fprintf(stderr, "FATAL: "); va_start(arglist, fmt); vfprintf(stderr, fmt, arglist); va_end(arglist); exit(1); } |
6d9a89ea4 kbuild: declare t... |
61 |
PRINTF void warn(const char *fmt, ...) |
1da177e4c Linux-2.6.12-rc2 |
62 63 64 65 66 67 68 69 70 |
{ va_list arglist; fprintf(stderr, "WARNING: "); va_start(arglist, fmt); vfprintf(stderr, fmt, arglist); va_end(arglist); } |
6d9a89ea4 kbuild: declare t... |
71 |
PRINTF void merror(const char *fmt, ...) |
2a1166594 kbuild: distingui... |
72 73 74 75 76 77 78 79 80 |
{ va_list arglist; fprintf(stderr, "ERROR: "); va_start(arglist, fmt); vfprintf(stderr, fmt, arglist); va_end(arglist); } |
040fcc819 kbuild: improved ... |
81 82 83 |
static int is_vmlinux(const char *modname) { const char *myname; |
df578e7d8 kbuild: clean up ... |
84 85 |
myname = strrchr(modname, '/'); if (myname) |
040fcc819 kbuild: improved ... |
86 87 88 |
myname++; else myname = modname; |
741f98fe2 kbuild: do sectio... |
89 90 |
return (strcmp(myname, "vmlinux") == 0) || (strcmp(myname, "vmlinux.o") == 0); |
040fcc819 kbuild: improved ... |
91 |
} |
1da177e4c Linux-2.6.12-rc2 |
92 93 |
void *do_nofail(void *ptr, const char *expr) { |
df578e7d8 kbuild: clean up ... |
94 |
if (!ptr) |
1da177e4c Linux-2.6.12-rc2 |
95 96 |
fatal("modpost: Memory allocation failure: %s. ", expr); |
df578e7d8 kbuild: clean up ... |
97 |
|
1da177e4c Linux-2.6.12-rc2 |
98 99 100 101 |
return ptr; } /* A list of all modules we processed */ |
1da177e4c Linux-2.6.12-rc2 |
102 |
static struct module *modules; |
5c3ead8c7 kbuild: apply Cod... |
103 |
static struct module *find_module(char *modname) |
1da177e4c Linux-2.6.12-rc2 |
104 105 106 107 108 109 110 111 |
{ struct module *mod; for (mod = modules; mod; mod = mod->next) if (strcmp(mod->name, modname) == 0) break; return mod; } |
5c3ead8c7 kbuild: apply Cod... |
112 |
static struct module *new_module(char *modname) |
1da177e4c Linux-2.6.12-rc2 |
113 114 115 |
{ struct module *mod; char *p, *s; |
62070fa42 kbuild: kill trai... |
116 |
|
1da177e4c Linux-2.6.12-rc2 |
117 118 119 120 121 |
mod = NOFAIL(malloc(sizeof(*mod))); memset(mod, 0, sizeof(*mod)); p = NOFAIL(strdup(modname)); /* strip trailing .o */ |
df578e7d8 kbuild: clean up ... |
122 123 |
s = strrchr(p, '.'); if (s != NULL) |
1da177e4c Linux-2.6.12-rc2 |
124 125 126 127 128 |
if (strcmp(s, ".o") == 0) *s = '\0'; /* add to list */ mod->name = p; |
b817f6fef kbuild: check lic... |
129 |
mod->gpl_compatible = -1; |
1da177e4c Linux-2.6.12-rc2 |
130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 |
mod->next = modules; modules = mod; return mod; } /* A hash of all exported symbols, * struct symbol is also used for lists of unresolved symbols */ #define SYMBOL_HASH_SIZE 1024 struct symbol { struct symbol *next; struct module *module; unsigned int crc; int crc_valid; unsigned int weak:1; |
040fcc819 kbuild: improved ... |
147 148 149 |
unsigned int vmlinux:1; /* 1 if symbol is defined in vmlinux */ unsigned int kernel:1; /* 1 if symbol is from kernel * (only for external modules) **/ |
8e70c4588 kbuild: warn abou... |
150 |
unsigned int preloaded:1; /* 1 if symbol from Module.symvers */ |
bd5cbcedf kbuild: export-ty... |
151 |
enum export export; /* Type of export */ |
1da177e4c Linux-2.6.12-rc2 |
152 153 154 155 156 157 158 159 160 161 162 163 |
char name[0]; }; static struct symbol *symbolhash[SYMBOL_HASH_SIZE]; /* This is based on the hash agorithm from gdbm, via tdb */ static inline unsigned int tdb_hash(const char *name) { unsigned value; /* Used to compute the hash value. */ unsigned i; /* Used to cycle through random values. */ /* Set the initial value from the key size. */ |
df578e7d8 kbuild: clean up ... |
164 |
for (value = 0x238F13AF * strlen(name), i = 0; name[i]; i++) |
1da177e4c Linux-2.6.12-rc2 |
165 166 167 168 |
value = (value + (((unsigned char *)name)[i] << (i*5 % 24))); return (1103515243 * value + 12345); } |
5c3ead8c7 kbuild: apply Cod... |
169 170 171 172 173 174 |
/** * Allocate a new symbols for use in the hash of exported symbols or * the list of unresolved symbols per module **/ static struct symbol *alloc_symbol(const char *name, unsigned int weak, struct symbol *next) |
1da177e4c Linux-2.6.12-rc2 |
175 176 177 178 179 180 181 182 183 184 185 |
{ struct symbol *s = NOFAIL(malloc(sizeof(*s) + strlen(name) + 1)); memset(s, 0, sizeof(*s)); strcpy(s->name, name); s->weak = weak; s->next = next; return s; } /* For the hash of exported symbols */ |
bd5cbcedf kbuild: export-ty... |
186 187 |
static struct symbol *new_symbol(const char *name, struct module *module, enum export export) |
1da177e4c Linux-2.6.12-rc2 |
188 189 190 191 192 193 194 |
{ unsigned int hash; struct symbol *new; hash = tdb_hash(name) % SYMBOL_HASH_SIZE; new = symbolhash[hash] = alloc_symbol(name, 0, symbolhash[hash]); new->module = module; |
bd5cbcedf kbuild: export-ty... |
195 |
new->export = export; |
040fcc819 kbuild: improved ... |
196 |
return new; |
1da177e4c Linux-2.6.12-rc2 |
197 |
} |
5c3ead8c7 kbuild: apply Cod... |
198 |
static struct symbol *find_symbol(const char *name) |
1da177e4c Linux-2.6.12-rc2 |
199 200 201 202 203 204 |
{ struct symbol *s; /* For our purposes, .foo matches foo. PPC64 needs this. */ if (name[0] == '.') name++; |
df578e7d8 kbuild: clean up ... |
205 |
for (s = symbolhash[tdb_hash(name) % SYMBOL_HASH_SIZE]; s; s = s->next) { |
1da177e4c Linux-2.6.12-rc2 |
206 207 208 209 210 |
if (strcmp(s->name, name) == 0) return s; } return NULL; } |
bd5cbcedf kbuild: export-ty... |
211 212 213 214 215 |
static struct { const char *str; enum export export; } export_list[] = { { .str = "EXPORT_SYMBOL", .export = export_plain }, |
c96fca213 kbuild: warn when... |
216 |
{ .str = "EXPORT_UNUSED_SYMBOL", .export = export_unused }, |
bd5cbcedf kbuild: export-ty... |
217 |
{ .str = "EXPORT_SYMBOL_GPL", .export = export_gpl }, |
c96fca213 kbuild: warn when... |
218 |
{ .str = "EXPORT_UNUSED_SYMBOL_GPL", .export = export_unused_gpl }, |
bd5cbcedf kbuild: export-ty... |
219 220 221 222 223 224 225 226 227 |
{ .str = "EXPORT_SYMBOL_GPL_FUTURE", .export = export_gpl_future }, { .str = "(unknown)", .export = export_unknown }, }; static const char *export_str(enum export ex) { return export_list[ex].str; } |
df578e7d8 kbuild: clean up ... |
228 |
static enum export export_no(const char *s) |
bd5cbcedf kbuild: export-ty... |
229 230 |
{ int i; |
df578e7d8 kbuild: clean up ... |
231 |
|
534b89a9f kbuild: fix segv ... |
232 233 |
if (!s) return export_unknown; |
bd5cbcedf kbuild: export-ty... |
234 235 236 237 238 239 |
for (i = 0; export_list[i].export != export_unknown; i++) { if (strcmp(export_list[i].str, s) == 0) return export_list[i].export; } return export_unknown; } |
1ce53adf1 modpost: support ... |
240 |
static enum export export_from_sec(struct elf_info *elf, unsigned int sec) |
bd5cbcedf kbuild: export-ty... |
241 242 243 |
{ if (sec == elf->export_sec) return export_plain; |
c96fca213 kbuild: warn when... |
244 245 |
else if (sec == elf->export_unused_sec) return export_unused; |
bd5cbcedf kbuild: export-ty... |
246 247 |
else if (sec == elf->export_gpl_sec) return export_gpl; |
c96fca213 kbuild: warn when... |
248 249 |
else if (sec == elf->export_unused_gpl_sec) return export_unused_gpl; |
bd5cbcedf kbuild: export-ty... |
250 251 252 253 254 |
else if (sec == elf->export_gpl_future_sec) return export_gpl_future; else return export_unknown; } |
5c3ead8c7 kbuild: apply Cod... |
255 256 257 258 |
/** * Add an exported symbol - it may have already been added without a * CRC, in this case just update the CRC **/ |
bd5cbcedf kbuild: export-ty... |
259 260 |
static struct symbol *sym_add_exported(const char *name, struct module *mod, enum export export) |
1da177e4c Linux-2.6.12-rc2 |
261 262 263 264 |
{ struct symbol *s = find_symbol(name); if (!s) { |
bd5cbcedf kbuild: export-ty... |
265 |
s = new_symbol(name, mod, export); |
8e70c4588 kbuild: warn abou... |
266 267 |
} else { if (!s->preloaded) { |
7b75b13cd kbuild: when warn... |
268 |
warn("%s: '%s' exported twice. Previous export " |
8e70c4588 kbuild: warn abou... |
269 270 271 272 |
"was in %s%s ", mod->name, name, s->module->name, is_vmlinux(s->module->name) ?"":".ko"); |
4b21960f9 kbuild: modpost p... |
273 274 275 |
} else { /* In case Modules.symvers was out of date */ s->module = mod; |
8e70c4588 kbuild: warn abou... |
276 |
} |
1da177e4c Linux-2.6.12-rc2 |
277 |
} |
8e70c4588 kbuild: warn abou... |
278 |
s->preloaded = 0; |
040fcc819 kbuild: improved ... |
279 280 |
s->vmlinux = is_vmlinux(mod->name); s->kernel = 0; |
bd5cbcedf kbuild: export-ty... |
281 |
s->export = export; |
040fcc819 kbuild: improved ... |
282 283 284 285 |
return s; } static void sym_update_crc(const char *name, struct module *mod, |
bd5cbcedf kbuild: export-ty... |
286 |
unsigned int crc, enum export export) |
040fcc819 kbuild: improved ... |
287 288 289 290 |
{ struct symbol *s = find_symbol(name); if (!s) |
bd5cbcedf kbuild: export-ty... |
291 |
s = new_symbol(name, mod, export); |
040fcc819 kbuild: improved ... |
292 293 |
s->crc = crc; s->crc_valid = 1; |
1da177e4c Linux-2.6.12-rc2 |
294 |
} |
5c3ead8c7 kbuild: apply Cod... |
295 |
void *grab_file(const char *filename, unsigned long *size) |
1da177e4c Linux-2.6.12-rc2 |
296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 |
{ struct stat st; void *map; int fd; fd = open(filename, O_RDONLY); if (fd < 0 || fstat(fd, &st) != 0) return NULL; *size = st.st_size; map = mmap(NULL, *size, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0); close(fd); if (map == MAP_FAILED) return NULL; return map; } |
5c3ead8c7 kbuild: apply Cod... |
313 314 315 316 317 |
/** * Return a copy of the next line in a mmap'ed file. * spaces in the beginning of the line is trimmed away. * Return a pointer to a static buffer. **/ |
df578e7d8 kbuild: clean up ... |
318 |
char *get_next_line(unsigned long *pos, void *file, unsigned long size) |
1da177e4c Linux-2.6.12-rc2 |
319 320 321 322 323 324 |
{ static char line[4096]; int skip = 1; size_t len = 0; signed char *p = (signed char *)file + *pos; char *s = line; |
df578e7d8 kbuild: clean up ... |
325 |
for (; *pos < size ; (*pos)++) { |
1da177e4c Linux-2.6.12-rc2 |
326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 |
if (skip && isspace(*p)) { p++; continue; } skip = 0; if (*p != ' ' && (*pos < size)) { len++; *s++ = *p++; if (len > 4095) break; /* Too long, stop */ } else { /* End of string */ *s = '\0'; return line; } } /* End of buffer */ return NULL; } |
5c3ead8c7 kbuild: apply Cod... |
346 |
void release_file(void *file, unsigned long size) |
1da177e4c Linux-2.6.12-rc2 |
347 348 349 |
{ munmap(file, size); } |
85bd2fddd kbuild: fix secti... |
350 |
static int parse_elf(struct elf_info *info, const char *filename) |
1da177e4c Linux-2.6.12-rc2 |
351 352 |
{ unsigned int i; |
85bd2fddd kbuild: fix secti... |
353 |
Elf_Ehdr *hdr; |
1da177e4c Linux-2.6.12-rc2 |
354 355 |
Elf_Shdr *sechdrs; Elf_Sym *sym; |
1ce53adf1 modpost: support ... |
356 357 |
const char *secstrings; unsigned int symtab_idx = ~0U, symtab_shndx_idx = ~0U; |
1da177e4c Linux-2.6.12-rc2 |
358 359 360 361 |
hdr = grab_file(filename, &info->size); if (!hdr) { perror(filename); |
6803dc0ea kbuild: replace a... |
362 |
exit(1); |
1da177e4c Linux-2.6.12-rc2 |
363 364 |
} info->hdr = hdr; |
85bd2fddd kbuild: fix secti... |
365 366 367 368 369 370 371 372 373 374 375 376 |
if (info->size < sizeof(*hdr)) { /* file too small, assume this is an empty .o file */ return 0; } /* Is this a valid ELF file? */ if ((hdr->e_ident[EI_MAG0] != ELFMAG0) || (hdr->e_ident[EI_MAG1] != ELFMAG1) || (hdr->e_ident[EI_MAG2] != ELFMAG2) || (hdr->e_ident[EI_MAG3] != ELFMAG3)) { /* Not an ELF file - silently ignore it */ return 0; } |
1da177e4c Linux-2.6.12-rc2 |
377 |
/* Fix endianness in ELF header */ |
7d875a028 kbuild, modpost: ... |
378 379 380 381 382 383 384 385 386 387 388 389 390 |
hdr->e_type = TO_NATIVE(hdr->e_type); hdr->e_machine = TO_NATIVE(hdr->e_machine); hdr->e_version = TO_NATIVE(hdr->e_version); hdr->e_entry = TO_NATIVE(hdr->e_entry); hdr->e_phoff = TO_NATIVE(hdr->e_phoff); hdr->e_shoff = TO_NATIVE(hdr->e_shoff); hdr->e_flags = TO_NATIVE(hdr->e_flags); hdr->e_ehsize = TO_NATIVE(hdr->e_ehsize); hdr->e_phentsize = TO_NATIVE(hdr->e_phentsize); hdr->e_phnum = TO_NATIVE(hdr->e_phnum); hdr->e_shentsize = TO_NATIVE(hdr->e_shentsize); hdr->e_shnum = TO_NATIVE(hdr->e_shnum); hdr->e_shstrndx = TO_NATIVE(hdr->e_shstrndx); |
1da177e4c Linux-2.6.12-rc2 |
391 392 |
sechdrs = (void *)hdr + hdr->e_shoff; info->sechdrs = sechdrs; |
a83710e58 kbuild: fix segfa... |
393 394 |
/* Check if file offset is correct */ if (hdr->e_shoff > info->size) { |
df578e7d8 kbuild: clean up ... |
395 396 397 398 |
fatal("section header offset=%lu in file '%s' is bigger than " "filesize=%lu ", (unsigned long)hdr->e_shoff, filename, info->size); |
a83710e58 kbuild: fix segfa... |
399 400 |
return 0; } |
1ce53adf1 modpost: support ... |
401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 |
if (hdr->e_shnum == 0) { /* * There are more than 64k sections, * read count from .sh_size. * note: it doesn't need shndx2secindex() */ info->num_sections = TO_NATIVE(sechdrs[0].sh_size); } else { info->num_sections = hdr->e_shnum; } if (hdr->e_shstrndx == SHN_XINDEX) { info->secindex_strings = shndx2secindex(TO_NATIVE(sechdrs[0].sh_link)); } else { info->secindex_strings = hdr->e_shstrndx; } |
1da177e4c Linux-2.6.12-rc2 |
419 |
/* Fix endianness in section headers */ |
1ce53adf1 modpost: support ... |
420 |
for (i = 0; i < info->num_sections; i++) { |
7d875a028 kbuild, modpost: ... |
421 422 423 424 425 426 427 428 429 430 |
sechdrs[i].sh_name = TO_NATIVE(sechdrs[i].sh_name); sechdrs[i].sh_type = TO_NATIVE(sechdrs[i].sh_type); sechdrs[i].sh_flags = TO_NATIVE(sechdrs[i].sh_flags); sechdrs[i].sh_addr = TO_NATIVE(sechdrs[i].sh_addr); sechdrs[i].sh_offset = TO_NATIVE(sechdrs[i].sh_offset); sechdrs[i].sh_size = TO_NATIVE(sechdrs[i].sh_size); sechdrs[i].sh_link = TO_NATIVE(sechdrs[i].sh_link); sechdrs[i].sh_info = TO_NATIVE(sechdrs[i].sh_info); sechdrs[i].sh_addralign = TO_NATIVE(sechdrs[i].sh_addralign); sechdrs[i].sh_entsize = TO_NATIVE(sechdrs[i].sh_entsize); |
1da177e4c Linux-2.6.12-rc2 |
431 432 |
} /* Find symbol table. */ |
1ce53adf1 modpost: support ... |
433 434 |
secstrings = (void *)hdr + sechdrs[info->secindex_strings].sh_offset; for (i = 1; i < info->num_sections; i++) { |
bd5cbcedf kbuild: export-ty... |
435 |
const char *secname; |
56fc82c53 modpost: NOBITS s... |
436 |
int nobits = sechdrs[i].sh_type == SHT_NOBITS; |
1da177e4c Linux-2.6.12-rc2 |
437 |
|
56fc82c53 modpost: NOBITS s... |
438 |
if (!nobits && sechdrs[i].sh_offset > info->size) { |
df578e7d8 kbuild: clean up ... |
439 440 441 442 443 |
fatal("%s is truncated. sechdrs[i].sh_offset=%lu > " "sizeof(*hrd)=%zu ", filename, (unsigned long)sechdrs[i].sh_offset, sizeof(*hdr)); |
85bd2fddd kbuild: fix secti... |
444 445 |
return 0; } |
bd5cbcedf kbuild: export-ty... |
446 447 |
secname = secstrings + sechdrs[i].sh_name; if (strcmp(secname, ".modinfo") == 0) { |
56fc82c53 modpost: NOBITS s... |
448 449 450 |
if (nobits) fatal("%s has NOBITS .modinfo ", filename); |
1da177e4c Linux-2.6.12-rc2 |
451 452 |
info->modinfo = (void *)hdr + sechdrs[i].sh_offset; info->modinfo_len = sechdrs[i].sh_size; |
bd5cbcedf kbuild: export-ty... |
453 454 |
} else if (strcmp(secname, "__ksymtab") == 0) info->export_sec = i; |
c96fca213 kbuild: warn when... |
455 456 |
else if (strcmp(secname, "__ksymtab_unused") == 0) info->export_unused_sec = i; |
bd5cbcedf kbuild: export-ty... |
457 458 |
else if (strcmp(secname, "__ksymtab_gpl") == 0) info->export_gpl_sec = i; |
c96fca213 kbuild: warn when... |
459 460 |
else if (strcmp(secname, "__ksymtab_unused_gpl") == 0) info->export_unused_gpl_sec = i; |
bd5cbcedf kbuild: export-ty... |
461 462 |
else if (strcmp(secname, "__ksymtab_gpl_future") == 0) info->export_gpl_future_sec = i; |
1ce53adf1 modpost: support ... |
463 464 465 466 467 468 469 470 471 472 473 |
if (sechdrs[i].sh_type == SHT_SYMTAB) { unsigned int sh_link_idx; symtab_idx = i; info->symtab_start = (void *)hdr + sechdrs[i].sh_offset; info->symtab_stop = (void *)hdr + sechdrs[i].sh_offset + sechdrs[i].sh_size; sh_link_idx = shndx2secindex(sechdrs[i].sh_link); info->strtab = (void *)hdr + sechdrs[sh_link_idx].sh_offset; } |
1da177e4c Linux-2.6.12-rc2 |
474 |
|
1ce53adf1 modpost: support ... |
475 476 477 478 479 480 481 482 |
/* 32bit section no. table? ("more than 64k sections") */ if (sechdrs[i].sh_type == SHT_SYMTAB_SHNDX) { symtab_shndx_idx = i; info->symtab_shndx_start = (void *)hdr + sechdrs[i].sh_offset; info->symtab_shndx_stop = (void *)hdr + sechdrs[i].sh_offset + sechdrs[i].sh_size; } |
1da177e4c Linux-2.6.12-rc2 |
483 |
} |
df578e7d8 kbuild: clean up ... |
484 |
if (!info->symtab_start) |
cb80514d9 kbuild: use warn(... |
485 486 |
fatal("%s has no symtab? ", filename); |
df578e7d8 kbuild: clean up ... |
487 |
|
1da177e4c Linux-2.6.12-rc2 |
488 489 490 491 492 493 494 |
/* Fix endianness in symbols */ for (sym = info->symtab_start; sym < info->symtab_stop; sym++) { sym->st_shndx = TO_NATIVE(sym->st_shndx); sym->st_name = TO_NATIVE(sym->st_name); sym->st_value = TO_NATIVE(sym->st_value); sym->st_size = TO_NATIVE(sym->st_size); } |
1ce53adf1 modpost: support ... |
495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 |
if (symtab_shndx_idx != ~0U) { Elf32_Word *p; if (symtab_idx != shndx2secindex(sechdrs[symtab_shndx_idx].sh_link)) fatal("%s: SYMTAB_SHNDX has bad sh_link: %u!=%u ", filename, shndx2secindex(sechdrs[symtab_shndx_idx].sh_link), symtab_idx); /* Fix endianness */ for (p = info->symtab_shndx_start; p < info->symtab_shndx_stop; p++) *p = TO_NATIVE(*p); } |
85bd2fddd kbuild: fix secti... |
510 |
return 1; |
1da177e4c Linux-2.6.12-rc2 |
511 |
} |
5c3ead8c7 kbuild: apply Cod... |
512 |
static void parse_elf_finish(struct elf_info *info) |
1da177e4c Linux-2.6.12-rc2 |
513 514 515 |
{ release_file(info->hdr, info->size); } |
4d7365d66 kbuild: ignore po... |
516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 |
static int ignore_undef_symbol(struct elf_info *info, const char *symname) { /* ignore __this_module, it will be resolved shortly */ if (strcmp(symname, MODULE_SYMBOL_PREFIX "__this_module") == 0) return 1; /* ignore global offset table */ if (strcmp(symname, "_GLOBAL_OFFSET_TABLE_") == 0) return 1; if (info->hdr->e_machine == EM_PPC) /* Special register function linked on all modules during final link of .ko */ if (strncmp(symname, "_restgpr_", sizeof("_restgpr_") - 1) == 0 || strncmp(symname, "_savegpr_", sizeof("_savegpr_") - 1) == 0 || strncmp(symname, "_rest32gpr_", sizeof("_rest32gpr_") - 1) == 0 || strncmp(symname, "_save32gpr_", sizeof("_save32gpr_") - 1) == 0) return 1; |
7fca5dc8a powerpc: Fix modu... |
531 532 533 534 535 |
if (info->hdr->e_machine == EM_PPC64) /* Special register function linked on all modules during final link of .ko */ if (strncmp(symname, "_restgpr0_", sizeof("_restgpr0_") - 1) == 0 || strncmp(symname, "_savegpr0_", sizeof("_savegpr0_") - 1) == 0) return 1; |
4d7365d66 kbuild: ignore po... |
536 537 538 |
/* Do not ignore this symbol */ return 0; } |
f7b05e64b kbuild: Fix bug i... |
539 540 |
#define CRC_PFX MODULE_SYMBOL_PREFIX "__crc_" #define KSYMTAB_PFX MODULE_SYMBOL_PREFIX "__ksymtab_" |
1da177e4c Linux-2.6.12-rc2 |
541 |
|
5c3ead8c7 kbuild: apply Cod... |
542 543 |
static void handle_modversions(struct module *mod, struct elf_info *info, Elf_Sym *sym, const char *symname) |
1da177e4c Linux-2.6.12-rc2 |
544 545 |
{ unsigned int crc; |
1ce53adf1 modpost: support ... |
546 |
enum export export = export_from_sec(info, get_secindex(info, sym)); |
1da177e4c Linux-2.6.12-rc2 |
547 548 549 |
switch (sym->st_shndx) { case SHN_COMMON: |
cb80514d9 kbuild: use warn(... |
550 551 |
warn("\"%s\" [%s] is COMMON symbol ", symname, mod->name); |
1da177e4c Linux-2.6.12-rc2 |
552 553 554 |
break; case SHN_ABS: /* CRC'd symbol */ |
8d99513c1 modpost: fix segf... |
555 |
if (strncmp(symname, CRC_PFX, strlen(CRC_PFX)) == 0) { |
1da177e4c Linux-2.6.12-rc2 |
556 |
crc = (unsigned int) sym->st_value; |
bd5cbcedf kbuild: export-ty... |
557 558 |
sym_update_crc(symname + strlen(CRC_PFX), mod, crc, export); |
1da177e4c Linux-2.6.12-rc2 |
559 560 561 562 563 564 565 |
} break; case SHN_UNDEF: /* undefined symbol */ if (ELF_ST_BIND(sym->st_info) != STB_GLOBAL && ELF_ST_BIND(sym->st_info) != STB_WEAK) break; |
4d7365d66 kbuild: ignore po... |
566 |
if (ignore_undef_symbol(info, symname)) |
1da177e4c Linux-2.6.12-rc2 |
567 |
break; |
8d5290149 [SPARC]: Deal wit... |
568 569 570 571 572 573 |
/* cope with newer glibc (2.3.4 or higher) STT_ definition in elf.h */ #if defined(STT_REGISTER) || defined(STT_SPARC_REGISTER) /* add compatibility with older glibc */ #ifndef STT_SPARC_REGISTER #define STT_SPARC_REGISTER STT_REGISTER #endif |
1da177e4c Linux-2.6.12-rc2 |
574 575 576 |
if (info->hdr->e_machine == EM_SPARC || info->hdr->e_machine == EM_SPARCV9) { /* Ignore register directives. */ |
8d5290149 [SPARC]: Deal wit... |
577 |
if (ELF_ST_TYPE(sym->st_info) == STT_SPARC_REGISTER) |
1da177e4c Linux-2.6.12-rc2 |
578 |
break; |
62070fa42 kbuild: kill trai... |
579 580 581 582 583 584 |
if (symname[0] == '.') { char *munged = strdup(symname); munged[0] = '_'; munged[1] = toupper(munged[1]); symname = munged; } |
1da177e4c Linux-2.6.12-rc2 |
585 586 |
} #endif |
62070fa42 kbuild: kill trai... |
587 |
|
1da177e4c Linux-2.6.12-rc2 |
588 |
if (memcmp(symname, MODULE_SYMBOL_PREFIX, |
df578e7d8 kbuild: clean up ... |
589 590 591 592 593 594 595 |
strlen(MODULE_SYMBOL_PREFIX)) == 0) { mod->unres = alloc_symbol(symname + strlen(MODULE_SYMBOL_PREFIX), ELF_ST_BIND(sym->st_info) == STB_WEAK, mod->unres); } |
1da177e4c Linux-2.6.12-rc2 |
596 597 598 |
break; default: /* All exported symbols */ |
8d99513c1 modpost: fix segf... |
599 |
if (strncmp(symname, KSYMTAB_PFX, strlen(KSYMTAB_PFX)) == 0) { |
bd5cbcedf kbuild: export-ty... |
600 601 |
sym_add_exported(symname + strlen(KSYMTAB_PFX), mod, export); |
1da177e4c Linux-2.6.12-rc2 |
602 603 604 605 606 607 608 609 |
} if (strcmp(symname, MODULE_SYMBOL_PREFIX "init_module") == 0) mod->has_init = 1; if (strcmp(symname, MODULE_SYMBOL_PREFIX "cleanup_module") == 0) mod->has_cleanup = 1; break; } } |
5c3ead8c7 kbuild: apply Cod... |
610 611 612 |
/** * Parse tag=value strings from .modinfo section **/ |
1da177e4c Linux-2.6.12-rc2 |
613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 |
static char *next_string(char *string, unsigned long *secsize) { /* Skip non-zero chars */ while (string[0]) { string++; if ((*secsize)-- <= 1) return NULL; } /* Skip any zero padding. */ while (!string[0]) { string++; if ((*secsize)-- <= 1) return NULL; } return string; } |
b817f6fef kbuild: check lic... |
630 631 |
static char *get_next_modinfo(void *modinfo, unsigned long modinfo_len, const char *tag, char *info) |
1da177e4c Linux-2.6.12-rc2 |
632 633 634 635 |
{ char *p; unsigned int taglen = strlen(tag); unsigned long size = modinfo_len; |
b817f6fef kbuild: check lic... |
636 637 638 639 |
if (info) { size -= info - (char *)modinfo; modinfo = next_string(info, &size); } |
1da177e4c Linux-2.6.12-rc2 |
640 641 642 643 644 645 |
for (p = modinfo; p; p = next_string(p, &size)) { if (strncmp(p, tag, taglen) == 0 && p[taglen] == '=') return p + taglen + 1; } return NULL; } |
b817f6fef kbuild: check lic... |
646 647 648 649 650 651 |
static char *get_modinfo(void *modinfo, unsigned long modinfo_len, const char *tag) { return get_next_modinfo(modinfo, modinfo_len, tag, NULL); } |
93684d3b8 kbuild: include s... |
652 |
/** |
4c8fbca58 kbuild: whitelist... |
653 654 655 656 657 |
* Test if string s ends in string sub * return 0 if match **/ static int strrcmp(const char *s, const char *sub) { |
df578e7d8 kbuild: clean up ... |
658 |
int slen, sublen; |
62070fa42 kbuild: kill trai... |
659 |
|
4c8fbca58 kbuild: whitelist... |
660 661 |
if (!s || !sub) return 1; |
62070fa42 kbuild: kill trai... |
662 |
|
4c8fbca58 kbuild: whitelist... |
663 |
slen = strlen(s); |
df578e7d8 kbuild: clean up ... |
664 |
sublen = strlen(sub); |
62070fa42 kbuild: kill trai... |
665 |
|
4c8fbca58 kbuild: whitelist... |
666 667 |
if ((slen == 0) || (sublen == 0)) return 1; |
df578e7d8 kbuild: clean up ... |
668 669 |
if (sublen > slen) return 1; |
4c8fbca58 kbuild: whitelist... |
670 |
|
df578e7d8 kbuild: clean up ... |
671 |
return memcmp(s + slen - sublen, sub, sublen); |
4c8fbca58 kbuild: whitelist... |
672 |
} |
ff13f9269 kbuild: introduce... |
673 674 |
static const char *sym_name(struct elf_info *elf, Elf_Sym *sym) { |
58fb0d4f2 kbuild: simplifie... |
675 676 677 |
if (sym) return elf->strtab + sym->st_name; else |
f666751a0 kbuild/modpost: i... |
678 |
return "(unknown)"; |
ff13f9269 kbuild: introduce... |
679 |
} |
1ce53adf1 modpost: support ... |
680 |
static const char *sec_name(struct elf_info *elf, int secindex) |
ff13f9269 kbuild: introduce... |
681 682 683 |
{ Elf_Shdr *sechdrs = elf->sechdrs; return (void *)elf->hdr + |
1ce53adf1 modpost: support ... |
684 685 |
elf->sechdrs[elf->secindex_strings].sh_offset + sechdrs[secindex].sh_name; |
ff13f9269 kbuild: introduce... |
686 687 688 689 690 |
} static const char *sech_name(struct elf_info *elf, Elf_Shdr *sechdr) { return (void *)elf->hdr + |
1ce53adf1 modpost: support ... |
691 692 |
elf->sechdrs[elf->secindex_strings].sh_offset + sechdr->sh_name; |
ff13f9269 kbuild: introduce... |
693 |
} |
10668220a kbuild: introduce... |
694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 |
/* if sym is empty or point to a string * like ".[0-9]+" then return 1. * This is the optional prefix added by ld to some sections */ static int number_prefix(const char *sym) { if (*sym++ == '\0') return 1; if (*sym != '.') return 0; do { char c = *sym++; if (c < '0' || c > '9') return 0; } while (*sym); return 1; } /* The pattern is an array of simple patterns. * "foo" will match an exact string equal to "foo" |
6c5bd235b kbuild: check sec... |
714 |
* "*foo" will match a string that ends with "foo" |
10668220a kbuild: introduce... |
715 716 717 718 719 720 |
* "foo*" will match a string that begins with "foo" * "foo$" will match a string equal to "foo" or "foo.1" * where the '1' can be any number including several digits. * The $ syntax is for sections where ld append a dot number * to make section name unique. */ |
5c7251384 Fix all -Wmissing... |
721 |
static int match(const char *sym, const char * const pat[]) |
10668220a kbuild: introduce... |
722 723 724 725 726 |
{ const char *p; while (*pat) { p = *pat++; const char *endp = p + strlen(p) - 1; |
6c5bd235b kbuild: check sec... |
727 728 729 730 731 |
/* "*foo" */ if (*p == '*') { if (strrcmp(sym, p + 1) == 0) return 1; } |
10668220a kbuild: introduce... |
732 |
/* "foo*" */ |
6c5bd235b kbuild: check sec... |
733 |
else if (*endp == '*') { |
10668220a kbuild: introduce... |
734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 |
if (strncmp(sym, p, strlen(p) - 1) == 0) return 1; } /* "foo$" */ else if (*endp == '$') { if (strncmp(sym, p, strlen(p) - 1) == 0) { if (number_prefix(sym + strlen(p) - 1)) return 1; } } /* no wildcards */ else { if (strcmp(p, sym) == 0) return 1; } } /* no match */ return 0; } |
10668220a kbuild: introduce... |
753 754 |
/* sections that we do not want to do full section mismatch check on */ static const char *section_white_list[] = |
4391ed6aa kbuild, modpost: ... |
755 756 757 |
{ ".comment*", ".debug*", |
019fca84e MN10300: Permit .... |
758 |
".GCC-command-line", /* mn10300 */ |
4391ed6aa kbuild, modpost: ... |
759 760 761 762 763 764 765 766 |
".mdebug*", /* alpha, score, mips etc. */ ".pdr", /* alpha, score, mips etc. */ ".stab*", ".note*", ".got*", ".toc*", NULL }; |
10668220a kbuild: introduce... |
767 |
|
e241a6303 kbuild: warn abou... |
768 |
/* |
b614a697d kbuild, modpost: ... |
769 |
* This is used to find sections missing the SHF_ALLOC flag. |
e241a6303 kbuild: warn abou... |
770 |
* The cause of this is often a section specified in assembler |
b614a697d kbuild, modpost: ... |
771 |
* without "ax" / "aw". |
e241a6303 kbuild: warn abou... |
772 |
*/ |
b614a697d kbuild, modpost: ... |
773 774 |
static void check_section(const char *modname, struct elf_info *elf, Elf_Shdr *sechdr) |
e241a6303 kbuild: warn abou... |
775 |
{ |
b614a697d kbuild, modpost: ... |
776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 |
const char *sec = sech_name(elf, sechdr); if (sechdr->sh_type == SHT_PROGBITS && !(sechdr->sh_flags & SHF_ALLOC) && !match(sec, section_white_list)) { warn("%s (%s): unexpected non-allocatable section. " "Did you forget to use \"ax\"/\"aw\" in a .S file? " "Note that for example <linux/init.h> contains " "section definitions for use in .S files. ", modname, sec); |
e241a6303 kbuild: warn abou... |
791 |
} |
e241a6303 kbuild: warn abou... |
792 |
} |
eb8f68904 Use separate sect... |
793 |
#define ALL_INIT_DATA_SECTIONS \ |
fd6c3a8dc initconst adjustm... |
794 795 |
".init.setup$", ".init.rodata$", \ ".devinit.rodata$", ".cpuinit.rodata$", ".meminit.rodata$" \ |
eb8f68904 Use separate sect... |
796 797 798 |
".init.data$", ".devinit.data$", ".cpuinit.data$", ".meminit.data$" #define ALL_EXIT_DATA_SECTIONS \ ".exit.data$", ".devexit.data$", ".cpuexit.data$", ".memexit.data$" |
10668220a kbuild: introduce... |
799 |
|
eb8f68904 Use separate sect... |
800 801 802 803 |
#define ALL_INIT_TEXT_SECTIONS \ ".init.text$", ".devinit.text$", ".cpuinit.text$", ".meminit.text$" #define ALL_EXIT_TEXT_SECTIONS \ ".exit.text$", ".devexit.text$", ".cpuexit.text$", ".memexit.text$" |
10668220a kbuild: introduce... |
804 |
|
4a31a229f modpost: define A... |
805 806 807 808 809 810 811 |
#define ALL_XXXINIT_SECTIONS DEV_INIT_SECTIONS, CPU_INIT_SECTIONS, \ MEM_INIT_SECTIONS #define ALL_XXXEXIT_SECTIONS DEV_EXIT_SECTIONS, CPU_EXIT_SECTIONS, \ MEM_EXIT_SECTIONS #define ALL_INIT_SECTIONS INIT_SECTIONS, ALL_XXXINIT_SECTIONS #define ALL_EXIT_SECTIONS EXIT_SECTIONS, ALL_XXXEXIT_SECTIONS |
10668220a kbuild: introduce... |
812 |
|
6c5bd235b kbuild: check sec... |
813 |
#define DATA_SECTIONS ".data$", ".data.rel$" |
10668220a kbuild: introduce... |
814 |
#define TEXT_SECTIONS ".text$" |
fd6c3a8dc initconst adjustm... |
815 816 817 818 |
#define INIT_SECTIONS ".init.*" #define DEV_INIT_SECTIONS ".devinit.*" #define CPU_INIT_SECTIONS ".cpuinit.*" #define MEM_INIT_SECTIONS ".meminit.*" |
eb8f68904 Use separate sect... |
819 |
|
fd6c3a8dc initconst adjustm... |
820 821 822 823 |
#define EXIT_SECTIONS ".exit.*" #define DEV_EXIT_SECTIONS ".devexit.*" #define CPU_EXIT_SECTIONS ".cpuexit.*" #define MEM_EXIT_SECTIONS ".memexit.*" |
eb8f68904 Use separate sect... |
824 |
|
6c5bd235b kbuild: check sec... |
825 |
/* init data sections */ |
eb8f68904 Use separate sect... |
826 |
static const char *init_data_sections[] = { ALL_INIT_DATA_SECTIONS, NULL }; |
6c5bd235b kbuild: check sec... |
827 828 |
/* all init sections */ |
eb8f68904 Use separate sect... |
829 |
static const char *init_sections[] = { ALL_INIT_SECTIONS, NULL }; |
6c5bd235b kbuild: check sec... |
830 831 832 |
/* All init and exit sections (code + data) */ static const char *init_exit_sections[] = |
eb8f68904 Use separate sect... |
833 |
{ALL_INIT_SECTIONS, ALL_EXIT_SECTIONS, NULL }; |
6c5bd235b kbuild: check sec... |
834 835 836 |
/* data section */ static const char *data_sections[] = { DATA_SECTIONS, NULL }; |
6c5bd235b kbuild: check sec... |
837 838 |
/* symbols in .data that may refer to init/exit sections */ |
af92a82d0 modpost: make sym... |
839 840 841 842 843 844 845 846 847 |
#define DEFAULT_SYMBOL_WHITE_LIST \ "*driver", \ "*_template", /* scsi uses *_template a lot */ \ "*_timer", /* arm uses ops structures named _timer a lot */ \ "*_sht", /* scsi also used *_sht to some extent */ \ "*_ops", \ "*_probe", \ "*_probe_one", \ "*_console" |
6c5bd235b kbuild: check sec... |
848 849 850 851 |
static const char *head_sections[] = { ".head.text*", NULL }; static const char *linker_symbols[] = { "__init_begin", "_sinittext", "_einittext", NULL }; |
588ccd732 kbuild: add verbo... |
852 |
enum mismatch { |
bbd3f4fb8 modpost: give mos... |
853 854 855 856 857 858 859 860 |
TEXT_TO_ANY_INIT, DATA_TO_ANY_INIT, TEXT_TO_ANY_EXIT, DATA_TO_ANY_EXIT, XXXINIT_TO_SOME_INIT, XXXEXIT_TO_SOME_EXIT, ANY_INIT_TO_ANY_EXIT, ANY_EXIT_TO_ANY_INIT, |
588ccd732 kbuild: add verbo... |
861 862 |
EXPORT_TO_INIT_EXIT, }; |
10668220a kbuild: introduce... |
863 864 865 |
struct sectioncheck { const char *fromsec[20]; const char *tosec[20]; |
588ccd732 kbuild: add verbo... |
866 |
enum mismatch mismatch; |
af92a82d0 modpost: make sym... |
867 |
const char *symbol_white_list[20]; |
10668220a kbuild: introduce... |
868 869 870 871 872 873 874 |
}; const struct sectioncheck sectioncheck[] = { /* Do not reference init/exit code/data from * normal code and data */ { |
588ccd732 kbuild: add verbo... |
875 876 |
.fromsec = { TEXT_SECTIONS, NULL }, .tosec = { ALL_INIT_SECTIONS, NULL }, |
bbd3f4fb8 modpost: give mos... |
877 |
.mismatch = TEXT_TO_ANY_INIT, |
af92a82d0 modpost: make sym... |
878 |
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, |
588ccd732 kbuild: add verbo... |
879 880 881 |
}, { .fromsec = { DATA_SECTIONS, NULL }, |
0db252452 modpost: don't al... |
882 |
.tosec = { ALL_XXXINIT_SECTIONS, NULL }, |
bbd3f4fb8 modpost: give mos... |
883 |
.mismatch = DATA_TO_ANY_INIT, |
af92a82d0 modpost: make sym... |
884 |
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, |
588ccd732 kbuild: add verbo... |
885 886 |
}, { |
0db252452 modpost: don't al... |
887 888 889 890 891 892 893 894 895 |
.fromsec = { DATA_SECTIONS, NULL }, .tosec = { INIT_SECTIONS, NULL }, .mismatch = DATA_TO_ANY_INIT, .symbol_white_list = { "*_template", "*_timer", "*_sht", "*_ops", "*_probe", "*_probe_one", "*_console", NULL }, }, { |
588ccd732 kbuild: add verbo... |
896 897 |
.fromsec = { TEXT_SECTIONS, NULL }, .tosec = { ALL_EXIT_SECTIONS, NULL }, |
bbd3f4fb8 modpost: give mos... |
898 |
.mismatch = TEXT_TO_ANY_EXIT, |
af92a82d0 modpost: make sym... |
899 |
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, |
588ccd732 kbuild: add verbo... |
900 901 902 903 |
}, { .fromsec = { DATA_SECTIONS, NULL }, .tosec = { ALL_EXIT_SECTIONS, NULL }, |
bbd3f4fb8 modpost: give mos... |
904 |
.mismatch = DATA_TO_ANY_EXIT, |
af92a82d0 modpost: make sym... |
905 |
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, |
eb8f68904 Use separate sect... |
906 907 908 |
}, /* Do not reference init code/data from devinit/cpuinit/meminit code/data */ { |
4a31a229f modpost: define A... |
909 |
.fromsec = { ALL_XXXINIT_SECTIONS, NULL }, |
588ccd732 kbuild: add verbo... |
910 |
.tosec = { INIT_SECTIONS, NULL }, |
bbd3f4fb8 modpost: give mos... |
911 |
.mismatch = XXXINIT_TO_SOME_INIT, |
af92a82d0 modpost: make sym... |
912 |
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, |
eb8f68904 Use separate sect... |
913 |
}, |
fd6c3a8dc initconst adjustm... |
914 915 916 917 |
/* Do not reference cpuinit code/data from meminit code/data */ { .fromsec = { MEM_INIT_SECTIONS, NULL }, .tosec = { CPU_INIT_SECTIONS, NULL }, |
bbd3f4fb8 modpost: give mos... |
918 |
.mismatch = XXXINIT_TO_SOME_INIT, |
af92a82d0 modpost: make sym... |
919 |
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, |
fd6c3a8dc initconst adjustm... |
920 921 922 923 924 |
}, /* Do not reference meminit code/data from cpuinit code/data */ { .fromsec = { CPU_INIT_SECTIONS, NULL }, .tosec = { MEM_INIT_SECTIONS, NULL }, |
bbd3f4fb8 modpost: give mos... |
925 |
.mismatch = XXXINIT_TO_SOME_INIT, |
af92a82d0 modpost: make sym... |
926 |
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, |
fd6c3a8dc initconst adjustm... |
927 |
}, |
eb8f68904 Use separate sect... |
928 929 |
/* Do not reference exit code/data from devexit/cpuexit/memexit code/data */ { |
4a31a229f modpost: define A... |
930 |
.fromsec = { ALL_XXXEXIT_SECTIONS, NULL }, |
588ccd732 kbuild: add verbo... |
931 |
.tosec = { EXIT_SECTIONS, NULL }, |
bbd3f4fb8 modpost: give mos... |
932 |
.mismatch = XXXEXIT_TO_SOME_EXIT, |
af92a82d0 modpost: make sym... |
933 |
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, |
10668220a kbuild: introduce... |
934 |
}, |
fd6c3a8dc initconst adjustm... |
935 936 937 938 |
/* Do not reference cpuexit code/data from memexit code/data */ { .fromsec = { MEM_EXIT_SECTIONS, NULL }, .tosec = { CPU_EXIT_SECTIONS, NULL }, |
bbd3f4fb8 modpost: give mos... |
939 |
.mismatch = XXXEXIT_TO_SOME_EXIT, |
af92a82d0 modpost: make sym... |
940 |
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, |
fd6c3a8dc initconst adjustm... |
941 942 943 944 945 |
}, /* Do not reference memexit code/data from cpuexit code/data */ { .fromsec = { CPU_EXIT_SECTIONS, NULL }, .tosec = { MEM_EXIT_SECTIONS, NULL }, |
bbd3f4fb8 modpost: give mos... |
946 |
.mismatch = XXXEXIT_TO_SOME_EXIT, |
af92a82d0 modpost: make sym... |
947 |
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, |
fd6c3a8dc initconst adjustm... |
948 |
}, |
10668220a kbuild: introduce... |
949 950 |
/* Do not use exit code/data from init code */ { |
eb8f68904 Use separate sect... |
951 952 |
.fromsec = { ALL_INIT_SECTIONS, NULL }, .tosec = { ALL_EXIT_SECTIONS, NULL }, |
bbd3f4fb8 modpost: give mos... |
953 |
.mismatch = ANY_INIT_TO_ANY_EXIT, |
af92a82d0 modpost: make sym... |
954 |
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, |
10668220a kbuild: introduce... |
955 956 957 |
}, /* Do not use init code/data from exit code */ { |
eb8f68904 Use separate sect... |
958 |
.fromsec = { ALL_EXIT_SECTIONS, NULL }, |
588ccd732 kbuild: add verbo... |
959 |
.tosec = { ALL_INIT_SECTIONS, NULL }, |
bbd3f4fb8 modpost: give mos... |
960 |
.mismatch = ANY_EXIT_TO_ANY_INIT, |
af92a82d0 modpost: make sym... |
961 |
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, |
10668220a kbuild: introduce... |
962 963 964 965 |
}, /* Do not export init/exit functions or data */ { .fromsec = { "__ksymtab*", NULL }, |
fa95eb1f1 kbuild: do not wa... |
966 |
.tosec = { INIT_SECTIONS, EXIT_SECTIONS, NULL }, |
af92a82d0 modpost: make sym... |
967 968 |
.mismatch = EXPORT_TO_INIT_EXIT, .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, |
10668220a kbuild: introduce... |
969 970 |
} }; |
0d2a636ee modpost: pass aro... |
971 972 |
static const struct sectioncheck *section_mismatch( const char *fromsec, const char *tosec) |
10668220a kbuild: introduce... |
973 974 975 976 977 978 979 980 |
{ int i; int elems = sizeof(sectioncheck) / sizeof(struct sectioncheck); const struct sectioncheck *check = §ioncheck[0]; for (i = 0; i < elems; i++) { if (match(fromsec, check->fromsec) && match(tosec, check->tosec)) |
0d2a636ee modpost: pass aro... |
981 |
return check; |
10668220a kbuild: introduce... |
982 983 |
check++; } |
0d2a636ee modpost: pass aro... |
984 |
return NULL; |
10668220a kbuild: introduce... |
985 |
} |
4c8fbca58 kbuild: whitelist... |
986 987 |
/** * Whitelist to allow certain references to pass with no warning. |
0e0d314e6 kbuild: introduce... |
988 |
* |
4c8fbca58 kbuild: whitelist... |
989 990 991 992 993 994 995 |
* Pattern 1: * If a module parameter is declared __initdata and permissions=0 * then this is legal despite the warning generated. * We cannot see value of permissions here, so just ignore * this pattern. * The pattern is identified by: * tosec = .init.data |
9209aed07 kbuild: kill fals... |
996 |
* fromsec = .data* |
4c8fbca58 kbuild: whitelist... |
997 |
* atsym =__param* |
62070fa42 kbuild: kill trai... |
998 |
* |
6a841528d param: silence .i... |
999 1000 1001 1002 1003 1004 1005 |
* Pattern 1a: * module_param_call() ops can refer to __init set function if permissions=0 * The pattern is identified by: * tosec = .init.text * fromsec = .data* * atsym = __param_ops_* * |
4c8fbca58 kbuild: whitelist... |
1006 |
* Pattern 2: |
72ee59b57 kbuild modpost - ... |
1007 |
* Many drivers utilise a *driver container with references to |
4c8fbca58 kbuild: whitelist... |
1008 |
* add, remove, probe functions etc. |
b75dcabd6 modpost: members ... |
1009 |
* These functions may often be marked __devinit and we do not want to |
4c8fbca58 kbuild: whitelist... |
1010 1011 |
* warn here. * the pattern is identified by: |
83cda2bb3 kbuild: be more f... |
1012 1013 |
* tosec = init or exit section * fromsec = data section |
df578e7d8 kbuild: clean up ... |
1014 1015 |
* atsym = *driver, *_template, *_sht, *_ops, *_probe, * *probe_one, *_console, *_timer |
ee6a8545a [PATCH] x86-64: M... |
1016 1017 |
* * Pattern 3: |
c993971f4 kbuild: fix comme... |
1018 |
* Whitelist all references from .head.text to any init section |
9bf8cb9b7 kbuild: fix warni... |
1019 |
* |
1d8af559f kbuild: consolida... |
1020 |
* Pattern 4: |
ee6a8545a [PATCH] x86-64: M... |
1021 1022 1023 1024 1025 1026 1027 |
* Some symbols belong to init section but still it is ok to reference * these from non-init sections as these symbols don't have any memory * allocated for them and symbol address and value are same. So even * if init section is freed, its ok to reference those symbols. * For ex. symbols marking the init section boundaries. * This pattern is identified by * refsymname = __init_begin, _sinittext, _einittext |
9bf8cb9b7 kbuild: fix warni... |
1028 |
* |
4c8fbca58 kbuild: whitelist... |
1029 |
**/ |
af92a82d0 modpost: make sym... |
1030 1031 |
static int secref_whitelist(const struct sectioncheck *mismatch, const char *fromsec, const char *fromsym, |
58fb0d4f2 kbuild: simplifie... |
1032 |
const char *tosec, const char *tosym) |
4c8fbca58 kbuild: whitelist... |
1033 |
{ |
4c8fbca58 kbuild: whitelist... |
1034 |
/* Check for pattern 1 */ |
6c5bd235b kbuild: check sec... |
1035 1036 |
if (match(tosec, init_data_sections) && match(fromsec, data_sections) && |
58fb0d4f2 kbuild: simplifie... |
1037 1038 |
(strncmp(fromsym, "__param", strlen("__param")) == 0)) return 0; |
4c8fbca58 kbuild: whitelist... |
1039 |
|
6a841528d param: silence .i... |
1040 1041 1042 1043 1044 |
/* Check for pattern 1a */ if (strcmp(tosec, ".init.text") == 0 && match(fromsec, data_sections) && (strncmp(fromsym, "__param_ops_", strlen("__param_ops_")) == 0)) return 0; |
4c8fbca58 kbuild: whitelist... |
1045 |
/* Check for pattern 2 */ |
6c5bd235b kbuild: check sec... |
1046 1047 |
if (match(tosec, init_exit_sections) && match(fromsec, data_sections) && |
af92a82d0 modpost: make sym... |
1048 |
match(fromsym, mismatch->symbol_white_list)) |
58fb0d4f2 kbuild: simplifie... |
1049 |
return 0; |
4c8fbca58 kbuild: whitelist... |
1050 |
|
9bf8cb9b7 kbuild: fix warni... |
1051 |
/* Check for pattern 3 */ |
6c5bd235b kbuild: check sec... |
1052 1053 |
if (match(fromsec, head_sections) && match(tosec, init_sections)) |
58fb0d4f2 kbuild: simplifie... |
1054 |
return 0; |
9bf8cb9b7 kbuild: fix warni... |
1055 |
|
1d8af559f kbuild: consolida... |
1056 |
/* Check for pattern 4 */ |
58fb0d4f2 kbuild: simplifie... |
1057 1058 |
if (match(tosym, linker_symbols)) return 0; |
9bf8cb9b7 kbuild: fix warni... |
1059 |
|
58fb0d4f2 kbuild: simplifie... |
1060 |
return 1; |
4c8fbca58 kbuild: whitelist... |
1061 1062 1063 |
} /** |
93684d3b8 kbuild: include s... |
1064 1065 1066 1067 1068 1069 |
* Find symbol based on relocation record info. * In some cases the symbol supplied is a valid symbol so * return refsym. If st_name != 0 we assume this is a valid symbol. * In other cases the symbol needs to be looked up in the symbol table * based on section and address. * **/ |
9ad21c3f3 kbuild: try harde... |
1070 |
static Elf_Sym *find_elf_symbol(struct elf_info *elf, Elf64_Sword addr, |
93684d3b8 kbuild: include s... |
1071 1072 1073 |
Elf_Sym *relsym) { Elf_Sym *sym; |
9ad21c3f3 kbuild: try harde... |
1074 1075 1076 |
Elf_Sym *near = NULL; Elf64_Sword distance = 20; Elf64_Sword d; |
1ce53adf1 modpost: support ... |
1077 |
unsigned int relsym_secindex; |
93684d3b8 kbuild: include s... |
1078 1079 1080 |
if (relsym->st_name != 0) return relsym; |
1ce53adf1 modpost: support ... |
1081 1082 |
relsym_secindex = get_secindex(elf, relsym); |
93684d3b8 kbuild: include s... |
1083 |
for (sym = elf->symtab_start; sym < elf->symtab_stop; sym++) { |
1ce53adf1 modpost: support ... |
1084 |
if (get_secindex(elf, sym) != relsym_secindex) |
93684d3b8 kbuild: include s... |
1085 |
continue; |
ae4ac1232 kbuild: make bett... |
1086 1087 |
if (ELF_ST_TYPE(sym->st_info) == STT_SECTION) continue; |
93684d3b8 kbuild: include s... |
1088 1089 |
if (sym->st_value == addr) return sym; |
9ad21c3f3 kbuild: try harde... |
1090 1091 1092 1093 1094 1095 1096 1097 |
/* Find a symbol nearby - addr are maybe negative */ d = sym->st_value - addr; if (d < 0) d = addr - sym->st_value; if (d < distance) { distance = d; near = sym; } |
93684d3b8 kbuild: include s... |
1098 |
} |
9ad21c3f3 kbuild: try harde... |
1099 1100 1101 1102 1103 |
/* We need a close match */ if (distance < 20) return near; else return NULL; |
93684d3b8 kbuild: include s... |
1104 |
} |
da68d61f8 [PATCH] remove mo... |
1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 |
static inline int is_arm_mapping_symbol(const char *str) { return str[0] == '$' && strchr("atd", str[1]) && (str[2] == '\0' || str[2] == '.'); } /* * If there's no name there, ignore it; likewise, ignore it if it's * one of the magic symbols emitted used by current ARM tools. * * Otherwise if find_symbols_between() returns those symbols, they'll * fail the whitelist tests and cause lots of false alarms ... fixable * only by merging __exit and __init sections into __text, bloating * the kernel (which is especially evil on embedded platforms). */ static inline int is_valid_name(struct elf_info *elf, Elf_Sym *sym) { const char *name = elf->strtab + sym->st_name; if (!name || !strlen(name)) return 0; return !is_arm_mapping_symbol(name); } |
b39927cf4 kbuild: check for... |
1128 |
/* |
43c74d179 kbuild: in the se... |
1129 1130 1131 1132 |
* Find symbols before or equal addr and after addr - in the section sec. * If we find two symbols with equal offset prefer one with a valid name. * The ELF format may have a better way to detect what type of symbol * it is, but this works for now. |
b39927cf4 kbuild: check for... |
1133 |
**/ |
157c23c80 kbuild: use simpl... |
1134 1135 |
static Elf_Sym *find_elf_symbol2(struct elf_info *elf, Elf_Addr addr, const char *sec) |
b39927cf4 kbuild: check for... |
1136 1137 |
{ Elf_Sym *sym; |
157c23c80 kbuild: use simpl... |
1138 |
Elf_Sym *near = NULL; |
157c23c80 kbuild: use simpl... |
1139 |
Elf_Addr distance = ~0; |
62070fa42 kbuild: kill trai... |
1140 |
|
b39927cf4 kbuild: check for... |
1141 1142 |
for (sym = elf->symtab_start; sym < elf->symtab_stop; sym++) { const char *symsec; |
1ce53adf1 modpost: support ... |
1143 |
if (is_shndx_special(sym->st_shndx)) |
b39927cf4 kbuild: check for... |
1144 |
continue; |
1ce53adf1 modpost: support ... |
1145 |
symsec = sec_name(elf, get_secindex(elf, sym)); |
b39927cf4 kbuild: check for... |
1146 1147 |
if (strcmp(symsec, sec) != 0) continue; |
da68d61f8 [PATCH] remove mo... |
1148 1149 |
if (!is_valid_name(elf, sym)) continue; |
b39927cf4 kbuild: check for... |
1150 |
if (sym->st_value <= addr) { |
157c23c80 kbuild: use simpl... |
1151 1152 1153 1154 1155 |
if ((addr - sym->st_value) < distance) { distance = addr - sym->st_value; near = sym; } else if ((addr - sym->st_value) == distance) { near = sym; |
43c74d179 kbuild: in the se... |
1156 |
} |
b39927cf4 kbuild: check for... |
1157 1158 |
} } |
157c23c80 kbuild: use simpl... |
1159 |
return near; |
b39927cf4 kbuild: check for... |
1160 |
} |
58fb0d4f2 kbuild: simplifie... |
1161 |
/* |
588ccd732 kbuild: add verbo... |
1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 |
* Convert a section name to the function/data attribute * .init.text => __init * .cpuinit.data => __cpudata * .memexitconst => __memconst * etc. */ static char *sec2annotation(const char *s) { if (match(s, init_exit_sections)) { char *p = malloc(20); char *r = p; *p++ = '_'; *p++ = '_'; if (*s == '.') s++; while (*s && *s != '.') *p++ = *s++; *p = '\0'; if (*s == '.') s++; if (strstr(s, "rodata") != NULL) strcat(p, "const "); else if (strstr(s, "data") != NULL) strcat(p, "data "); else strcat(p, " "); return r; /* we leak her but we do not care */ } else { |
5003bab82 fix "scripts/mod/... |
1191 |
return strdup(""); |
588ccd732 kbuild: add verbo... |
1192 1193 1194 1195 1196 1197 1198 1199 |
} } static int is_function(Elf_Sym *sym) { if (sym) return ELF_ST_TYPE(sym->st_info) == STT_FUNC; else |
f666751a0 kbuild/modpost: i... |
1200 |
return -1; |
588ccd732 kbuild: add verbo... |
1201 1202 1203 |
} /* |
b39927cf4 kbuild: check for... |
1204 1205 |
* Print a warning about a section mismatch. * Try to find symbols near it so user can find it. |
4c8fbca58 kbuild: whitelist... |
1206 |
* Check whitelist before warning - it may be a false positive. |
58fb0d4f2 kbuild: simplifie... |
1207 |
*/ |
0d2a636ee modpost: pass aro... |
1208 1209 |
static void report_sec_mismatch(const char *modname, const struct sectioncheck *mismatch, |
58fb0d4f2 kbuild: simplifie... |
1210 1211 1212 |
const char *fromsec, unsigned long long fromaddr, const char *fromsym, |
588ccd732 kbuild: add verbo... |
1213 1214 1215 1216 1217 1218 |
int from_is_func, const char *tosec, const char *tosym, int to_is_func) { const char *from, *from_p; const char *to, *to_p; |
37ed19d5c scripts/mod/modpo... |
1219 1220 |
char *prl_from; char *prl_to; |
f666751a0 kbuild/modpost: i... |
1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 |
switch (from_is_func) { case 0: from = "variable"; from_p = ""; break; case 1: from = "function"; from_p = "()"; break; default: from = "(unknown reference)"; from_p = ""; break; } switch (to_is_func) { case 0: to = "variable"; to_p = ""; break; case 1: to = "function"; to_p = "()"; break; default: to = "(unknown reference)"; to_p = ""; break; } |
588ccd732 kbuild: add verbo... |
1232 |
|
e5f95c8b7 kbuild: print onl... |
1233 1234 1235 |
sec_mismatch_count++; if (!sec_mismatch_verbose) return; |
7c0ac495e kbuild/modpost: U... |
1236 1237 1238 1239 1240 |
warn("%s(%s+0x%llx): Section mismatch in reference from the %s %s%s " "to the %s %s:%s%s ", modname, fromsec, fromaddr, from, fromsym, from_p, to, tosec, tosym, to_p); |
588ccd732 kbuild: add verbo... |
1241 |
|
0d2a636ee modpost: pass aro... |
1242 |
switch (mismatch->mismatch) { |
bbd3f4fb8 modpost: give mos... |
1243 |
case TEXT_TO_ANY_INIT: |
37ed19d5c scripts/mod/modpo... |
1244 1245 |
prl_from = sec2annotation(fromsec); prl_to = sec2annotation(tosec); |
588ccd732 kbuild: add verbo... |
1246 |
fprintf(stderr, |
f666751a0 kbuild/modpost: i... |
1247 1248 |
"The function %s%s() references " |
588ccd732 kbuild: add verbo... |
1249 1250 1251 1252 1253 1254 |
"the %s %s%s%s. " "This is often because %s lacks a %s " "annotation or the annotation of %s is wrong. ", |
37ed19d5c scripts/mod/modpo... |
1255 1256 1257 1258 1259 |
prl_from, fromsym, to, prl_to, tosym, to_p, fromsym, prl_to, tosym); free(prl_from); free(prl_to); |
588ccd732 kbuild: add verbo... |
1260 |
break; |
bbd3f4fb8 modpost: give mos... |
1261 |
case DATA_TO_ANY_INIT: { |
37ed19d5c scripts/mod/modpo... |
1262 |
prl_to = sec2annotation(tosec); |
af92a82d0 modpost: make sym... |
1263 |
const char *const *s = mismatch->symbol_white_list; |
588ccd732 kbuild: add verbo... |
1264 1265 1266 1267 1268 1269 1270 |
fprintf(stderr, "The variable %s references " "the %s %s%s%s " "If the reference is valid then annotate the " |
8b8b76c04 kbuild: add hint ... |
1271 |
"variable with __init* or __refdata (see linux/init.h) " |
588ccd732 kbuild: add verbo... |
1272 1273 |
"or name the variable: ", |
37ed19d5c scripts/mod/modpo... |
1274 |
fromsym, to, prl_to, tosym, to_p); |
588ccd732 kbuild: add verbo... |
1275 1276 1277 1278 |
while (*s) fprintf(stderr, "%s, ", *s++); fprintf(stderr, " "); |
37ed19d5c scripts/mod/modpo... |
1279 |
free(prl_to); |
588ccd732 kbuild: add verbo... |
1280 |
break; |
58fb0d4f2 kbuild: simplifie... |
1281 |
} |
bbd3f4fb8 modpost: give mos... |
1282 |
case TEXT_TO_ANY_EXIT: |
37ed19d5c scripts/mod/modpo... |
1283 |
prl_to = sec2annotation(tosec); |
588ccd732 kbuild: add verbo... |
1284 1285 1286 1287 1288 1289 1290 |
fprintf(stderr, "The function %s() references a %s in an exit section. " "Often the %s %s%s has valid usage outside the exit section " "and the fix is to remove the %sannotation of %s. ", |
37ed19d5c scripts/mod/modpo... |
1291 1292 |
fromsym, to, to, tosym, to_p, prl_to, tosym); free(prl_to); |
588ccd732 kbuild: add verbo... |
1293 |
break; |
bbd3f4fb8 modpost: give mos... |
1294 |
case DATA_TO_ANY_EXIT: { |
37ed19d5c scripts/mod/modpo... |
1295 |
prl_to = sec2annotation(tosec); |
af92a82d0 modpost: make sym... |
1296 |
const char *const *s = mismatch->symbol_white_list; |
588ccd732 kbuild: add verbo... |
1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 |
fprintf(stderr, "The variable %s references " "the %s %s%s%s " "If the reference is valid then annotate the " "variable with __exit* (see linux/init.h) or " "name the variable: ", |
37ed19d5c scripts/mod/modpo... |
1307 |
fromsym, to, prl_to, tosym, to_p); |
588ccd732 kbuild: add verbo... |
1308 1309 1310 1311 |
while (*s) fprintf(stderr, "%s, ", *s++); fprintf(stderr, " "); |
37ed19d5c scripts/mod/modpo... |
1312 |
free(prl_to); |
588ccd732 kbuild: add verbo... |
1313 1314 |
break; } |
bbd3f4fb8 modpost: give mos... |
1315 1316 |
case XXXINIT_TO_SOME_INIT: case XXXEXIT_TO_SOME_EXIT: |
37ed19d5c scripts/mod/modpo... |
1317 1318 |
prl_from = sec2annotation(fromsec); prl_to = sec2annotation(tosec); |
588ccd732 kbuild: add verbo... |
1319 1320 1321 1322 1323 1324 1325 1326 1327 |
fprintf(stderr, "The %s %s%s%s references " "a %s %s%s%s. " "If %s is only used by %s then " "annotate %s with a matching annotation. ", |
37ed19d5c scripts/mod/modpo... |
1328 1329 |
from, prl_from, fromsym, from_p, to, prl_to, tosym, to_p, |
b1d2675a6 kbuild: fix rever... |
1330 |
tosym, fromsym, tosym); |
37ed19d5c scripts/mod/modpo... |
1331 1332 |
free(prl_from); free(prl_to); |
588ccd732 kbuild: add verbo... |
1333 |
break; |
bbd3f4fb8 modpost: give mos... |
1334 |
case ANY_INIT_TO_ANY_EXIT: |
37ed19d5c scripts/mod/modpo... |
1335 1336 |
prl_from = sec2annotation(fromsec); prl_to = sec2annotation(tosec); |
588ccd732 kbuild: add verbo... |
1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 |
fprintf(stderr, "The %s %s%s%s references " "a %s %s%s%s. " "This is often seen when error handling " "in the init function " "uses functionality in the exit path. " "The fix is often to remove the %sannotation of " "%s%s so it may be used outside an exit section. ", |
37ed19d5c scripts/mod/modpo... |
1351 1352 |
from, prl_from, fromsym, from_p, to, prl_to, tosym, to_p, |
5003bab82 fix "scripts/mod/... |
1353 |
prl_to, tosym, to_p); |
37ed19d5c scripts/mod/modpo... |
1354 1355 |
free(prl_from); free(prl_to); |
588ccd732 kbuild: add verbo... |
1356 |
break; |
bbd3f4fb8 modpost: give mos... |
1357 |
case ANY_EXIT_TO_ANY_INIT: |
37ed19d5c scripts/mod/modpo... |
1358 1359 |
prl_from = sec2annotation(fromsec); prl_to = sec2annotation(tosec); |
588ccd732 kbuild: add verbo... |
1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 |
fprintf(stderr, "The %s %s%s%s references " "a %s %s%s%s. " "This is often seen when error handling " "in the exit function " "uses functionality in the init path. " "The fix is often to remove the %sannotation of " "%s%s so it may be used outside an init section. ", |
37ed19d5c scripts/mod/modpo... |
1374 1375 1376 1377 1378 |
from, prl_from, fromsym, from_p, to, prl_to, tosym, to_p, prl_to, tosym, to_p); free(prl_from); free(prl_to); |
588ccd732 kbuild: add verbo... |
1379 1380 |
break; case EXPORT_TO_INIT_EXIT: |
37ed19d5c scripts/mod/modpo... |
1381 |
prl_to = sec2annotation(tosec); |
588ccd732 kbuild: add verbo... |
1382 1383 1384 1385 1386 1387 |
fprintf(stderr, "The symbol %s is exported and annotated %s " "Fix this by removing the %sannotation of %s " "or drop the export. ", |
37ed19d5c scripts/mod/modpo... |
1388 1389 |
tosym, prl_to, prl_to, tosym); free(prl_to); |
588ccd732 kbuild: add verbo... |
1390 1391 1392 1393 |
break; } fprintf(stderr, " "); |
58fb0d4f2 kbuild: simplifie... |
1394 1395 1396 1397 1398 1399 |
} static void check_section_mismatch(const char *modname, struct elf_info *elf, Elf_Rela *r, Elf_Sym *sym, const char *fromsec) { const char *tosec; |
0d2a636ee modpost: pass aro... |
1400 |
const struct sectioncheck *mismatch; |
58fb0d4f2 kbuild: simplifie... |
1401 |
|
1ce53adf1 modpost: support ... |
1402 |
tosec = sec_name(elf, get_secindex(elf, sym)); |
588ccd732 kbuild: add verbo... |
1403 |
mismatch = section_mismatch(fromsec, tosec); |
0d2a636ee modpost: pass aro... |
1404 |
if (mismatch) { |
588ccd732 kbuild: add verbo... |
1405 1406 |
Elf_Sym *to; Elf_Sym *from; |
58fb0d4f2 kbuild: simplifie... |
1407 |
const char *tosym; |
588ccd732 kbuild: add verbo... |
1408 |
const char *fromsym; |
58fb0d4f2 kbuild: simplifie... |
1409 |
|
588ccd732 kbuild: add verbo... |
1410 1411 1412 1413 |
from = find_elf_symbol2(elf, r->r_offset, fromsec); fromsym = sym_name(elf, from); to = find_elf_symbol(elf, r->r_addend, sym); tosym = sym_name(elf, to); |
58fb0d4f2 kbuild: simplifie... |
1414 1415 |
/* check whitelist - we may ignore it */ |
af92a82d0 modpost: make sym... |
1416 1417 |
if (secref_whitelist(mismatch, fromsec, fromsym, tosec, tosym)) { |
588ccd732 kbuild: add verbo... |
1418 1419 1420 1421 |
report_sec_mismatch(modname, mismatch, fromsec, r->r_offset, fromsym, is_function(from), tosec, tosym, is_function(to)); |
58fb0d4f2 kbuild: simplifie... |
1422 |
} |
b39927cf4 kbuild: check for... |
1423 1424 |
} } |
ae4ac1232 kbuild: make bett... |
1425 |
static unsigned int *reloc_location(struct elf_info *elf, |
5b24c0715 kbuild: code refa... |
1426 |
Elf_Shdr *sechdr, Elf_Rela *r) |
ae4ac1232 kbuild: make bett... |
1427 1428 |
{ Elf_Shdr *sechdrs = elf->sechdrs; |
1ce53adf1 modpost: support ... |
1429 |
int section = shndx2secindex(sechdr->sh_info); |
ae4ac1232 kbuild: make bett... |
1430 1431 |
return (void *)elf->hdr + sechdrs[section].sh_offset + |
1c938663d kbuild: Fix modpo... |
1432 |
r->r_offset - sechdrs[section].sh_addr; |
ae4ac1232 kbuild: make bett... |
1433 |
} |
5b24c0715 kbuild: code refa... |
1434 |
static int addend_386_rel(struct elf_info *elf, Elf_Shdr *sechdr, Elf_Rela *r) |
ae4ac1232 kbuild: make bett... |
1435 1436 |
{ unsigned int r_typ = ELF_R_TYPE(r->r_info); |
5b24c0715 kbuild: code refa... |
1437 |
unsigned int *location = reloc_location(elf, sechdr, r); |
ae4ac1232 kbuild: make bett... |
1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 |
switch (r_typ) { case R_386_32: r->r_addend = TO_NATIVE(*location); break; case R_386_PC32: r->r_addend = TO_NATIVE(*location) + 4; /* For CONFIG_RELOCATABLE=y */ if (elf->hdr->e_type == ET_EXEC) r->r_addend += r->r_offset; break; } return 0; } |
5b24c0715 kbuild: code refa... |
1452 |
static int addend_arm_rel(struct elf_info *elf, Elf_Shdr *sechdr, Elf_Rela *r) |
56a974fa2 kbuild: make bett... |
1453 1454 1455 1456 1457 1458 |
{ unsigned int r_typ = ELF_R_TYPE(r->r_info); switch (r_typ) { case R_ARM_ABS32: /* From ARM ABI: (S + A) | T */ |
df578e7d8 kbuild: clean up ... |
1459 1460 |
r->r_addend = (int)(long) (elf->symtab_start + ELF_R_SYM(r->r_info)); |
56a974fa2 kbuild: make bett... |
1461 1462 1463 |
break; case R_ARM_PC24: /* From ARM ABI: ((S + A) | T) - P */ |
df578e7d8 kbuild: clean up ... |
1464 |
r->r_addend = (int)(long)(elf->hdr + |
5b24c0715 kbuild: code refa... |
1465 1466 |
sechdr->sh_offset + (r->r_offset - sechdr->sh_addr)); |
56a974fa2 kbuild: make bett... |
1467 1468 1469 1470 1471 1472 |
break; default: return 1; } return 0; } |
5b24c0715 kbuild: code refa... |
1473 |
static int addend_mips_rel(struct elf_info *elf, Elf_Shdr *sechdr, Elf_Rela *r) |
ae4ac1232 kbuild: make bett... |
1474 1475 |
{ unsigned int r_typ = ELF_R_TYPE(r->r_info); |
5b24c0715 kbuild: code refa... |
1476 |
unsigned int *location = reloc_location(elf, sechdr, r); |
ae4ac1232 kbuild: make bett... |
1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 |
unsigned int inst; if (r_typ == R_MIPS_HI16) return 1; /* skip this */ inst = TO_NATIVE(*location); switch (r_typ) { case R_MIPS_LO16: r->r_addend = inst & 0xffff; break; case R_MIPS_26: r->r_addend = (inst & 0x03ffffff) << 2; break; case R_MIPS_32: r->r_addend = inst; break; } return 0; } |
5b24c0715 kbuild: code refa... |
1495 |
static void section_rela(const char *modname, struct elf_info *elf, |
10668220a kbuild: introduce... |
1496 |
Elf_Shdr *sechdr) |
5b24c0715 kbuild: code refa... |
1497 1498 1499 1500 1501 1502 |
{ Elf_Sym *sym; Elf_Rela *rela; Elf_Rela r; unsigned int r_sym; const char *fromsec; |
5b24c0715 kbuild: code refa... |
1503 |
|
ff13f9269 kbuild: introduce... |
1504 |
Elf_Rela *start = (void *)elf->hdr + sechdr->sh_offset; |
5b24c0715 kbuild: code refa... |
1505 |
Elf_Rela *stop = (void *)start + sechdr->sh_size; |
ff13f9269 kbuild: introduce... |
1506 |
fromsec = sech_name(elf, sechdr); |
5b24c0715 kbuild: code refa... |
1507 1508 |
fromsec += strlen(".rela"); /* if from section (name) is know good then skip it */ |
b614a697d kbuild, modpost: ... |
1509 |
if (match(fromsec, section_white_list)) |
5b24c0715 kbuild: code refa... |
1510 |
return; |
e241a6303 kbuild: warn abou... |
1511 |
|
5b24c0715 kbuild: code refa... |
1512 1513 1514 |
for (rela = start; rela < stop; rela++) { r.r_offset = TO_NATIVE(rela->r_offset); #if KERNEL_ELFCLASS == ELFCLASS64 |
ff13f9269 kbuild: introduce... |
1515 |
if (elf->hdr->e_machine == EM_MIPS) { |
5b24c0715 kbuild: code refa... |
1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 |
unsigned int r_typ; r_sym = ELF64_MIPS_R_SYM(rela->r_info); r_sym = TO_NATIVE(r_sym); r_typ = ELF64_MIPS_R_TYPE(rela->r_info); r.r_info = ELF64_R_INFO(r_sym, r_typ); } else { r.r_info = TO_NATIVE(rela->r_info); r_sym = ELF_R_SYM(r.r_info); } #else r.r_info = TO_NATIVE(rela->r_info); r_sym = ELF_R_SYM(r.r_info); #endif r.r_addend = TO_NATIVE(rela->r_addend); sym = elf->symtab_start + r_sym; /* Skip special sections */ |
1ce53adf1 modpost: support ... |
1532 |
if (is_shndx_special(sym->st_shndx)) |
5b24c0715 kbuild: code refa... |
1533 |
continue; |
58fb0d4f2 kbuild: simplifie... |
1534 |
check_section_mismatch(modname, elf, &r, sym, fromsec); |
5b24c0715 kbuild: code refa... |
1535 1536 1537 1538 |
} } static void section_rel(const char *modname, struct elf_info *elf, |
10668220a kbuild: introduce... |
1539 |
Elf_Shdr *sechdr) |
5b24c0715 kbuild: code refa... |
1540 1541 1542 1543 1544 1545 |
{ Elf_Sym *sym; Elf_Rel *rel; Elf_Rela r; unsigned int r_sym; const char *fromsec; |
5b24c0715 kbuild: code refa... |
1546 |
|
ff13f9269 kbuild: introduce... |
1547 |
Elf_Rel *start = (void *)elf->hdr + sechdr->sh_offset; |
5b24c0715 kbuild: code refa... |
1548 |
Elf_Rel *stop = (void *)start + sechdr->sh_size; |
ff13f9269 kbuild: introduce... |
1549 |
fromsec = sech_name(elf, sechdr); |
5b24c0715 kbuild: code refa... |
1550 1551 |
fromsec += strlen(".rel"); /* if from section (name) is know good then skip it */ |
b614a697d kbuild, modpost: ... |
1552 |
if (match(fromsec, section_white_list)) |
5b24c0715 kbuild: code refa... |
1553 1554 1555 1556 1557 |
return; for (rel = start; rel < stop; rel++) { r.r_offset = TO_NATIVE(rel->r_offset); #if KERNEL_ELFCLASS == ELFCLASS64 |
ff13f9269 kbuild: introduce... |
1558 |
if (elf->hdr->e_machine == EM_MIPS) { |
5b24c0715 kbuild: code refa... |
1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 |
unsigned int r_typ; r_sym = ELF64_MIPS_R_SYM(rel->r_info); r_sym = TO_NATIVE(r_sym); r_typ = ELF64_MIPS_R_TYPE(rel->r_info); r.r_info = ELF64_R_INFO(r_sym, r_typ); } else { r.r_info = TO_NATIVE(rel->r_info); r_sym = ELF_R_SYM(r.r_info); } #else r.r_info = TO_NATIVE(rel->r_info); r_sym = ELF_R_SYM(r.r_info); #endif r.r_addend = 0; |
ff13f9269 kbuild: introduce... |
1573 |
switch (elf->hdr->e_machine) { |
5b24c0715 kbuild: code refa... |
1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 |
case EM_386: if (addend_386_rel(elf, sechdr, &r)) continue; break; case EM_ARM: if (addend_arm_rel(elf, sechdr, &r)) continue; break; case EM_MIPS: if (addend_mips_rel(elf, sechdr, &r)) continue; break; } sym = elf->symtab_start + r_sym; /* Skip special sections */ |
1ce53adf1 modpost: support ... |
1589 |
if (is_shndx_special(sym->st_shndx)) |
5b24c0715 kbuild: code refa... |
1590 |
continue; |
58fb0d4f2 kbuild: simplifie... |
1591 |
check_section_mismatch(modname, elf, &r, sym, fromsec); |
5b24c0715 kbuild: code refa... |
1592 1593 |
} } |
b39927cf4 kbuild: check for... |
1594 1595 1596 1597 1598 1599 1600 |
/** * A module includes a number of sections that are discarded * either when loaded or when used as built-in. * For loaded modules all functions marked __init and all data * marked __initdata will be discarded when the module has been intialized. * Likewise for modules used built-in the sections marked __exit * are discarded because __exit marked function are supposed to be called |
32be1d223 scripts/mod/modpo... |
1601 |
* only when a module is unloaded which never happens for built-in modules. |
b39927cf4 kbuild: check for... |
1602 1603 1604 1605 1606 |
* The check_sec_ref() function traverses all relocation records * to find all references to a section that reference a section that will * be discarded and warns about it. **/ static void check_sec_ref(struct module *mod, const char *modname, |
10668220a kbuild: introduce... |
1607 |
struct elf_info *elf) |
b39927cf4 kbuild: check for... |
1608 1609 |
{ int i; |
b39927cf4 kbuild: check for... |
1610 |
Elf_Shdr *sechdrs = elf->sechdrs; |
62070fa42 kbuild: kill trai... |
1611 |
|
b39927cf4 kbuild: check for... |
1612 |
/* Walk through all sections */ |
1ce53adf1 modpost: support ... |
1613 |
for (i = 0; i < elf->num_sections; i++) { |
b614a697d kbuild, modpost: ... |
1614 |
check_section(modname, elf, &elf->sechdrs[i]); |
b39927cf4 kbuild: check for... |
1615 |
/* We want to process only relocation sections and not .init */ |
5b24c0715 kbuild: code refa... |
1616 |
if (sechdrs[i].sh_type == SHT_RELA) |
10668220a kbuild: introduce... |
1617 |
section_rela(modname, elf, &elf->sechdrs[i]); |
5b24c0715 kbuild: code refa... |
1618 |
else if (sechdrs[i].sh_type == SHT_REL) |
10668220a kbuild: introduce... |
1619 |
section_rel(modname, elf, &elf->sechdrs[i]); |
b39927cf4 kbuild: check for... |
1620 1621 |
} } |
5c3ead8c7 kbuild: apply Cod... |
1622 |
static void read_symbols(char *modname) |
1da177e4c Linux-2.6.12-rc2 |
1623 1624 1625 |
{ const char *symname; char *version; |
b817f6fef kbuild: check lic... |
1626 |
char *license; |
1da177e4c Linux-2.6.12-rc2 |
1627 1628 1629 |
struct module *mod; struct elf_info info = { }; Elf_Sym *sym; |
85bd2fddd kbuild: fix secti... |
1630 1631 |
if (!parse_elf(&info, modname)) return; |
1da177e4c Linux-2.6.12-rc2 |
1632 1633 1634 1635 1636 1637 |
mod = new_module(modname); /* When there's no vmlinux, don't print warnings about * unresolved symbols (since there'll be too many ;) */ if (is_vmlinux(modname)) { |
1da177e4c Linux-2.6.12-rc2 |
1638 |
have_vmlinux = 1; |
1da177e4c Linux-2.6.12-rc2 |
1639 1640 |
mod->skip = 1; } |
b817f6fef kbuild: check lic... |
1641 |
license = get_modinfo(info.modinfo, info.modinfo_len, "license"); |
2fa365682 kbuild: soften MO... |
1642 1643 1644 1645 1646 1647 |
if (info.modinfo && !license && !is_vmlinux(modname)) warn("modpost: missing MODULE_LICENSE() in %s " "see include/linux/module.h for " "more information ", modname); |
b817f6fef kbuild: check lic... |
1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 |
while (license) { if (license_is_gpl_compatible(license)) mod->gpl_compatible = 1; else { mod->gpl_compatible = 0; break; } license = get_next_modinfo(info.modinfo, info.modinfo_len, "license", license); } |
1da177e4c Linux-2.6.12-rc2 |
1658 1659 1660 1661 1662 1663 |
for (sym = info.symtab_start; sym < info.symtab_stop; sym++) { symname = info.strtab + sym->st_name; handle_modversions(mod, &info, sym, symname); handle_moddevtable(mod, &info, sym, symname); } |
d1f25e665 kbuild: fix so mo... |
1664 |
if (!is_vmlinux(modname) || |
10668220a kbuild: introduce... |
1665 1666 |
(is_vmlinux(modname) && vmlinux_section_warnings)) check_sec_ref(mod, modname, &info); |
1da177e4c Linux-2.6.12-rc2 |
1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 |
version = get_modinfo(info.modinfo, info.modinfo_len, "version"); if (version) maybe_frob_rcs_version(modname, version, info.modinfo, version - (char *)info.hdr); if (version || (all_versions && !is_vmlinux(modname))) get_src_version(modname, mod->srcversion, sizeof(mod->srcversion)-1); parse_elf_finish(&info); |
8c8ef42ae module: include o... |
1677 |
/* Our trick to get versioning for module struct etc. - it's |
1da177e4c Linux-2.6.12-rc2 |
1678 1679 1680 1681 |
* never passed as an argument to an exported function, so * the automatic versioning doesn't pick it up, but it's really * important anyhow */ if (modversions) |
8c8ef42ae module: include o... |
1682 |
mod->unres = alloc_symbol("module_layout", 0, mod->unres); |
1da177e4c Linux-2.6.12-rc2 |
1683 1684 1685 1686 1687 1688 1689 |
} #define SZ 500 /* We first write the generated file into memory using the * following helper, then compare to the file on disk and * only update the later if anything changed */ |
5c3ead8c7 kbuild: apply Cod... |
1690 1691 |
void __attribute__((format(printf, 2, 3))) buf_printf(struct buffer *buf, const char *fmt, ...) |
1da177e4c Linux-2.6.12-rc2 |
1692 1693 1694 1695 |
{ char tmp[SZ]; int len; va_list ap; |
62070fa42 kbuild: kill trai... |
1696 |
|
1da177e4c Linux-2.6.12-rc2 |
1697 1698 |
va_start(ap, fmt); len = vsnprintf(tmp, SZ, fmt, ap); |
7670f023a [PATCH] kbuild: f... |
1699 |
buf_write(buf, tmp, len); |
1da177e4c Linux-2.6.12-rc2 |
1700 1701 |
va_end(ap); } |
5c3ead8c7 kbuild: apply Cod... |
1702 |
void buf_write(struct buffer *buf, const char *s, int len) |
1da177e4c Linux-2.6.12-rc2 |
1703 1704 |
{ if (buf->size - buf->pos < len) { |
7670f023a [PATCH] kbuild: f... |
1705 |
buf->size += len + SZ; |
1da177e4c Linux-2.6.12-rc2 |
1706 1707 1708 1709 1710 |
buf->p = realloc(buf->p, buf->size); } strncpy(buf->p + buf->pos, s, len); buf->pos += len; } |
c96fca213 kbuild: warn when... |
1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 |
static void check_for_gpl_usage(enum export exp, const char *m, const char *s) { const char *e = is_vmlinux(m) ?"":".ko"; switch (exp) { case export_gpl: fatal("modpost: GPL-incompatible module %s%s " "uses GPL-only symbol '%s' ", m, e, s); break; case export_unused_gpl: fatal("modpost: GPL-incompatible module %s%s " "uses GPL-only symbol marked UNUSED '%s' ", m, e, s); break; case export_gpl_future: warn("modpost: GPL-incompatible module %s%s " "uses future GPL-only symbol '%s' ", m, e, s); break; case export_plain: case export_unused: case export_unknown: /* ignore */ break; } } |
df578e7d8 kbuild: clean up ... |
1738 |
static void check_for_unused(enum export exp, const char *m, const char *s) |
c96fca213 kbuild: warn when... |
1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 |
{ const char *e = is_vmlinux(m) ?"":".ko"; switch (exp) { case export_unused: case export_unused_gpl: warn("modpost: module %s%s " "uses symbol '%s' marked UNUSED ", m, e, s); break; default: /* ignore */ break; } } static void check_exports(struct module *mod) |
b817f6fef kbuild: check lic... |
1756 1757 1758 1759 |
{ struct symbol *s, *exp; for (s = mod->unres; s; s = s->next) { |
6449bd621 kbuild: modpost b... |
1760 |
const char *basename; |
b817f6fef kbuild: check lic... |
1761 1762 1763 |
exp = find_symbol(s->name); if (!exp || exp->module == mod) continue; |
6449bd621 kbuild: modpost b... |
1764 |
basename = strrchr(mod->name, '/'); |
b817f6fef kbuild: check lic... |
1765 1766 |
if (basename) basename++; |
c96fca213 kbuild: warn when... |
1767 1768 1769 1770 1771 |
else basename = mod->name; if (!mod->gpl_compatible) check_for_gpl_usage(exp->export, basename, exp->name); check_for_unused(exp->export, basename, exp->name); |
df578e7d8 kbuild: clean up ... |
1772 |
} |
b817f6fef kbuild: check lic... |
1773 |
} |
5c3ead8c7 kbuild: apply Cod... |
1774 1775 1776 1777 |
/** * Header for the generated file **/ static void add_header(struct buffer *b, struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 |
{ buf_printf(b, "#include <linux/module.h> "); buf_printf(b, "#include <linux/vermagic.h> "); buf_printf(b, "#include <linux/compiler.h> "); buf_printf(b, " "); buf_printf(b, "MODULE_INFO(vermagic, VERMAGIC_STRING); "); buf_printf(b, " "); |
1da177e4c Linux-2.6.12-rc2 |
1791 1792 1793 1794 |
buf_printf(b, "struct module __this_module "); buf_printf(b, "__attribute__((section(\".gnu.linkonce.this_module\"))) = { "); |
f83b5e323 kbuild: set corre... |
1795 1796 |
buf_printf(b, " .name = KBUILD_MODNAME, "); |
1da177e4c Linux-2.6.12-rc2 |
1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 |
if (mod->has_init) buf_printf(b, " .init = init_module, "); if (mod->has_cleanup) buf_printf(b, "#ifdef CONFIG_MODULE_UNLOAD " " .exit = cleanup_module, " "#endif "); |
e61a1c1c4 Allow arch to ini... |
1807 1808 |
buf_printf(b, " .arch = MODULE_ARCH_INIT, "); |
1da177e4c Linux-2.6.12-rc2 |
1809 1810 1811 |
buf_printf(b, "}; "); } |
5c7251384 Fix all -Wmissing... |
1812 |
static void add_staging_flag(struct buffer *b, const char *name) |
a9860bf05 Staging: add TAIN... |
1813 1814 1815 1816 1817 1818 1819 1820 |
{ static const char *staging_dir = "drivers/staging"; if (strncmp(staging_dir, name, strlen(staging_dir)) == 0) buf_printf(b, " MODULE_INFO(staging, \"Y\"); "); } |
5c3ead8c7 kbuild: apply Cod... |
1821 1822 1823 |
/** * Record CRCs for unresolved symbols **/ |
c53ddacdc kbuild: fail kern... |
1824 |
static int add_versions(struct buffer *b, struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
1825 1826 |
{ struct symbol *s, *exp; |
c53ddacdc kbuild: fail kern... |
1827 |
int err = 0; |
1da177e4c Linux-2.6.12-rc2 |
1828 1829 1830 1831 |
for (s = mod->unres; s; s = s->next) { exp = find_symbol(s->name); if (!exp || exp->module == mod) { |
c53ddacdc kbuild: fail kern... |
1832 |
if (have_vmlinux && !s->weak) { |
2a1166594 kbuild: distingui... |
1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 |
if (warn_unresolved) { warn("\"%s\" [%s.ko] undefined! ", s->name, mod->name); } else { merror("\"%s\" [%s.ko] undefined! ", s->name, mod->name); err = 1; } |
c53ddacdc kbuild: fail kern... |
1843 |
} |
1da177e4c Linux-2.6.12-rc2 |
1844 1845 1846 1847 1848 1849 1850 1851 |
continue; } s->module = exp->module; s->crc_valid = exp->crc_valid; s->crc = exp->crc; } if (!modversions) |
c53ddacdc kbuild: fail kern... |
1852 |
return err; |
1da177e4c Linux-2.6.12-rc2 |
1853 1854 1855 1856 1857 |
buf_printf(b, " "); buf_printf(b, "static const struct modversion_info ____versions[] "); |
3ff6eecca remove __attribut... |
1858 1859 |
buf_printf(b, "__used "); |
1da177e4c Linux-2.6.12-rc2 |
1860 1861 1862 1863 |
buf_printf(b, "__attribute__((section(\"__versions\"))) = { "); for (s = mod->unres; s; s = s->next) { |
df578e7d8 kbuild: clean up ... |
1864 |
if (!s->module) |
1da177e4c Linux-2.6.12-rc2 |
1865 |
continue; |
1da177e4c Linux-2.6.12-rc2 |
1866 |
if (!s->crc_valid) { |
cb80514d9 kbuild: use warn(... |
1867 1868 |
warn("\"%s\" [%s.ko] has no CRC! ", |
1da177e4c Linux-2.6.12-rc2 |
1869 1870 1871 1872 1873 1874 1875 1876 1877 |
s->name, mod->name); continue; } buf_printf(b, "\t{ %#8x, \"%s\" }, ", s->crc, s->name); } buf_printf(b, "}; "); |
c53ddacdc kbuild: fail kern... |
1878 1879 |
return err; |
1da177e4c Linux-2.6.12-rc2 |
1880 |
} |
5c3ead8c7 kbuild: apply Cod... |
1881 1882 |
static void add_depends(struct buffer *b, struct module *mod, struct module *modules) |
1da177e4c Linux-2.6.12-rc2 |
1883 1884 1885 1886 |
{ struct symbol *s; struct module *m; int first = 1; |
df578e7d8 kbuild: clean up ... |
1887 |
for (m = modules; m; m = m->next) |
1da177e4c Linux-2.6.12-rc2 |
1888 |
m->seen = is_vmlinux(m->name); |
1da177e4c Linux-2.6.12-rc2 |
1889 1890 1891 1892 1893 |
buf_printf(b, " "); buf_printf(b, "static const char __module_depends[] "); |
3ff6eecca remove __attribut... |
1894 1895 |
buf_printf(b, "__used "); |
1da177e4c Linux-2.6.12-rc2 |
1896 1897 1898 1899 |
buf_printf(b, "__attribute__((section(\".modinfo\"))) = "); buf_printf(b, "\"depends="); for (s = mod->unres; s; s = s->next) { |
a61b2dfd1 kbuild: fix segme... |
1900 |
const char *p; |
1da177e4c Linux-2.6.12-rc2 |
1901 1902 1903 1904 1905 1906 1907 |
if (!s->module) continue; if (s->module->seen) continue; s->module->seen = 1; |
df578e7d8 kbuild: clean up ... |
1908 1909 |
p = strrchr(s->module->name, '/'); if (p) |
a61b2dfd1 kbuild: fix segme... |
1910 1911 1912 1913 |
p++; else p = s->module->name; buf_printf(b, "%s%s", first ? "" : ",", p); |
1da177e4c Linux-2.6.12-rc2 |
1914 1915 1916 1917 1918 |
first = 0; } buf_printf(b, "\"; "); } |
5c3ead8c7 kbuild: apply Cod... |
1919 |
static void add_srcversion(struct buffer *b, struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
1920 1921 1922 1923 1924 1925 1926 1927 1928 |
{ if (mod->srcversion[0]) { buf_printf(b, " "); buf_printf(b, "MODULE_INFO(srcversion, \"%s\"); ", mod->srcversion); } } |
5c3ead8c7 kbuild: apply Cod... |
1929 |
static void write_if_changed(struct buffer *b, const char *fname) |
1da177e4c Linux-2.6.12-rc2 |
1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 |
{ char *tmp; FILE *file; struct stat st; file = fopen(fname, "r"); if (!file) goto write; if (fstat(fileno(file), &st) < 0) goto close_write; if (st.st_size != b->pos) goto close_write; tmp = NOFAIL(malloc(b->pos)); if (fread(tmp, 1, b->pos, file) != b->pos) goto free_write; if (memcmp(tmp, b->p, b->pos) != 0) goto free_write; free(tmp); fclose(file); return; free_write: free(tmp); close_write: fclose(file); write: file = fopen(fname, "w"); if (!file) { perror(fname); exit(1); } if (fwrite(b->p, 1, b->pos, file) != b->pos) { perror(fname); exit(1); } fclose(file); } |
bd5cbcedf kbuild: export-ty... |
1972 |
/* parse Module.symvers file. line format: |
534b89a9f kbuild: fix segv ... |
1973 |
* 0x12345678<tab>symbol<tab>module[[<tab>export]<tab>something] |
bd5cbcedf kbuild: export-ty... |
1974 |
**/ |
040fcc819 kbuild: improved ... |
1975 |
static void read_dump(const char *fname, unsigned int kernel) |
1da177e4c Linux-2.6.12-rc2 |
1976 1977 1978 1979 |
{ unsigned long size, pos = 0; void *file = grab_file(fname, &size); char *line; |
df578e7d8 kbuild: clean up ... |
1980 |
if (!file) |
1da177e4c Linux-2.6.12-rc2 |
1981 1982 1983 1984 |
/* No symbol versions, silently ignore */ return; while ((line = get_next_line(&pos, file, size))) { |
534b89a9f kbuild: fix segv ... |
1985 |
char *symname, *modname, *d, *export, *end; |
1da177e4c Linux-2.6.12-rc2 |
1986 1987 |
unsigned int crc; struct module *mod; |
040fcc819 kbuild: improved ... |
1988 |
struct symbol *s; |
1da177e4c Linux-2.6.12-rc2 |
1989 1990 1991 1992 1993 1994 1995 |
if (!(symname = strchr(line, '\t'))) goto fail; *symname++ = '\0'; if (!(modname = strchr(symname, '\t'))) goto fail; *modname++ = '\0'; |
9ac545b0f kbuild: fix modul... |
1996 |
if ((export = strchr(modname, '\t')) != NULL) |
bd5cbcedf kbuild: export-ty... |
1997 |
*export++ = '\0'; |
534b89a9f kbuild: fix segv ... |
1998 1999 |
if (export && ((end = strchr(export, '\t')) != NULL)) *end = '\0'; |
1da177e4c Linux-2.6.12-rc2 |
2000 2001 2002 |
crc = strtoul(line, &d, 16); if (*symname == '\0' || *modname == '\0' || *d != '\0') goto fail; |
df578e7d8 kbuild: clean up ... |
2003 2004 2005 |
mod = find_module(modname); if (!mod) { if (is_vmlinux(modname)) |
1da177e4c Linux-2.6.12-rc2 |
2006 |
have_vmlinux = 1; |
0fa3a88cf kbuild: remove po... |
2007 |
mod = new_module(modname); |
1da177e4c Linux-2.6.12-rc2 |
2008 2009 |
mod->skip = 1; } |
bd5cbcedf kbuild: export-ty... |
2010 |
s = sym_add_exported(symname, mod, export_no(export)); |
8e70c4588 kbuild: warn abou... |
2011 2012 |
s->kernel = kernel; s->preloaded = 1; |
bd5cbcedf kbuild: export-ty... |
2013 |
sym_update_crc(symname, mod, crc, export_no(export)); |
1da177e4c Linux-2.6.12-rc2 |
2014 2015 2016 2017 2018 2019 |
} return; fail: fatal("parse error in symbol dump file "); } |
040fcc819 kbuild: improved ... |
2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 |
/* For normal builds always dump all symbols. * For external modules only dump symbols * that are not read from kernel Module.symvers. **/ static int dump_sym(struct symbol *sym) { if (!external_module) return 1; if (sym->vmlinux || sym->kernel) return 0; return 1; } |
62070fa42 kbuild: kill trai... |
2032 |
|
5c3ead8c7 kbuild: apply Cod... |
2033 |
static void write_dump(const char *fname) |
1da177e4c Linux-2.6.12-rc2 |
2034 2035 2036 2037 2038 2039 2040 2041 |
{ struct buffer buf = { }; struct symbol *symbol; int n; for (n = 0; n < SYMBOL_HASH_SIZE ; n++) { symbol = symbolhash[n]; while (symbol) { |
040fcc819 kbuild: improved ... |
2042 |
if (dump_sym(symbol)) |
bd5cbcedf kbuild: export-ty... |
2043 2044 |
buf_printf(&buf, "0x%08x\t%s\t%s\t%s ", |
62070fa42 kbuild: kill trai... |
2045 |
symbol->crc, symbol->name, |
bd5cbcedf kbuild: export-ty... |
2046 2047 |
symbol->module->name, export_str(symbol->export)); |
1da177e4c Linux-2.6.12-rc2 |
2048 2049 2050 2051 2052 |
symbol = symbol->next; } } write_if_changed(&buf, fname); } |
2d04b5ae1 kbuild: support l... |
2053 2054 2055 2056 |
struct ext_sym_list { struct ext_sym_list *next; const char *file; }; |
5c3ead8c7 kbuild: apply Cod... |
2057 |
int main(int argc, char **argv) |
1da177e4c Linux-2.6.12-rc2 |
2058 2059 2060 |
{ struct module *mod; struct buffer buf = { }; |
040fcc819 kbuild: improved ... |
2061 2062 |
char *kernel_read = NULL, *module_read = NULL; char *dump_write = NULL; |
1da177e4c Linux-2.6.12-rc2 |
2063 |
int opt; |
c53ddacdc kbuild: fail kern... |
2064 |
int err; |
2d04b5ae1 kbuild: support l... |
2065 2066 |
struct ext_sym_list *extsym_iter; struct ext_sym_list *extsym_start = NULL; |
1da177e4c Linux-2.6.12-rc2 |
2067 |
|
2d04b5ae1 kbuild: support l... |
2068 |
while ((opt = getopt(argc, argv, "i:I:e:cmsSo:awM:K:")) != -1) { |
df578e7d8 kbuild: clean up ... |
2069 2070 2071 2072 2073 2074 2075 2076 |
switch (opt) { case 'i': kernel_read = optarg; break; case 'I': module_read = optarg; external_module = 1; break; |
4ce6efed4 kbuild: soften mo... |
2077 2078 2079 |
case 'c': cross_build = 1; break; |
2d04b5ae1 kbuild: support l... |
2080 2081 2082 2083 2084 2085 2086 2087 |
case 'e': external_module = 1; extsym_iter = NOFAIL(malloc(sizeof(*extsym_iter))); extsym_iter->next = extsym_start; extsym_iter->file = optarg; extsym_start = extsym_iter; break; |
df578e7d8 kbuild: clean up ... |
2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 |
case 'm': modversions = 1; break; case 'o': dump_write = optarg; break; case 'a': all_versions = 1; break; case 's': vmlinux_section_warnings = 0; break; |
588ccd732 kbuild: add verbo... |
2100 2101 2102 |
case 'S': sec_mismatch_verbose = 0; break; |
df578e7d8 kbuild: clean up ... |
2103 2104 2105 2106 2107 |
case 'w': warn_unresolved = 1; break; default: exit(1); |
1da177e4c Linux-2.6.12-rc2 |
2108 2109 |
} } |
040fcc819 kbuild: improved ... |
2110 2111 2112 2113 |
if (kernel_read) read_dump(kernel_read, 1); if (module_read) read_dump(module_read, 0); |
2d04b5ae1 kbuild: support l... |
2114 2115 2116 2117 2118 2119 |
while (extsym_start) { read_dump(extsym_start->file, 0); extsym_iter = extsym_start->next; free(extsym_start); extsym_start = extsym_iter; } |
1da177e4c Linux-2.6.12-rc2 |
2120 |
|
df578e7d8 kbuild: clean up ... |
2121 |
while (optind < argc) |
1da177e4c Linux-2.6.12-rc2 |
2122 |
read_symbols(argv[optind++]); |
1da177e4c Linux-2.6.12-rc2 |
2123 2124 2125 2126 |
for (mod = modules; mod; mod = mod->next) { if (mod->skip) continue; |
c96fca213 kbuild: warn when... |
2127 |
check_exports(mod); |
b817f6fef kbuild: check lic... |
2128 |
} |
c53ddacdc kbuild: fail kern... |
2129 |
err = 0; |
b817f6fef kbuild: check lic... |
2130 |
for (mod = modules; mod; mod = mod->next) { |
666ab414f kbuild: fix a buf... |
2131 |
char fname[strlen(mod->name) + 10]; |
b817f6fef kbuild: check lic... |
2132 2133 |
if (mod->skip) continue; |
1da177e4c Linux-2.6.12-rc2 |
2134 2135 2136 2137 |
buf.pos = 0; add_header(&buf, mod); |
a9860bf05 Staging: add TAIN... |
2138 |
add_staging_flag(&buf, mod->name); |
c53ddacdc kbuild: fail kern... |
2139 |
err |= add_versions(&buf, mod); |
1da177e4c Linux-2.6.12-rc2 |
2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 |
add_depends(&buf, mod, modules); add_moddevtable(&buf, mod); add_srcversion(&buf, mod); sprintf(fname, "%s.mod.c", mod->name); write_if_changed(&buf, fname); } if (dump_write) write_dump(dump_write); |
588ccd732 kbuild: add verbo... |
2150 |
if (sec_mismatch_count && !sec_mismatch_verbose) |
7c0ac495e kbuild/modpost: U... |
2151 2152 2153 2154 2155 2156 2157 |
warn("modpost: Found %d section mismatch(es). " "To see full details build your kernel with: " "'make CONFIG_DEBUG_SECTION_MISMATCH=y' ", sec_mismatch_count); |
1da177e4c Linux-2.6.12-rc2 |
2158 |
|
c53ddacdc kbuild: fail kern... |
2159 |
return err; |
1da177e4c Linux-2.6.12-rc2 |
2160 |
} |