diff options
| -rw-r--r-- | scripts/mod/modpost.c | 197 |
1 files changed, 101 insertions, 96 deletions
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index 4d1c590..696d2a5 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -2,7 +2,7 @@ * * Copyright 2003 Kai Germaschewski * Copyright 2002-2004 Rusty Russell, IBM Corporation - * Copyright 2006 Sam Ravnborg + * Copyright 2006-2008 Sam Ravnborg * Based in part on module-init-tools/depmod.c,file2alias * * This software may be used and distributed according to the terms @@ -74,7 +74,8 @@ static int is_vmlinux(const char *modname) { const char *myname; - if ((myname = strrchr(modname, '/'))) + myname = strrchr(modname, '/'); + if (myname) myname++; else myname = modname; @@ -85,14 +86,13 @@ static int is_vmlinux(const char *modname) void *do_nofail(void *ptr, const char *expr) { - if (!ptr) { + if (!ptr) fatal("modpost: Memory allocation failure: %s.\n", expr); - } + return ptr; } /* A list of all modules we processed */ - static struct module *modules; static struct module *find_module(char *modname) @@ -115,7 +115,8 @@ static struct module *new_module(char *modname) p = NOFAIL(strdup(modname)); /* strip trailing .o */ - if ((s = strrchr(p, '.')) != NULL) + s = strrchr(p, '.'); + if (s != NULL) if (strcmp(s, ".o") == 0) *s = '\0'; @@ -156,7 +157,7 @@ static inline unsigned int tdb_hash(const char *name) unsigned i; /* Used to cycle through random values. */ /* Set the initial value from the key size. */ - for (value = 0x238F13AF * strlen(name), i=0; name[i]; i++) + for (value = 0x238F13AF * strlen(name), i = 0; name[i]; i++) value = (value + (((unsigned char *)name)[i] << (i*5 % 24))); return (1103515243 * value + 12345); @@ -200,7 +201,7 @@ static struct symbol *find_symbol(const char *name) if (name[0] == '.') name++; - for (s = symbolhash[tdb_hash(name) % SYMBOL_HASH_SIZE]; s; s=s->next) { + for (s = symbolhash[tdb_hash(name) % SYMBOL_HASH_SIZE]; s; s = s->next) { if (strcmp(s->name, name) == 0) return s; } @@ -225,9 +226,10 @@ static const char *export_str(enum export ex) return export_list[ex].str; } -static enum export export_no(const char * s) +static enum export export_no(const char *s) { int i; + if (!s) return export_unknown; for (i = 0; export_list[i].export != export_unknown; i++) { @@ -317,7 +319,7 @@ void *grab_file(const char *filename, unsigned long *size) * spaces in the beginning of the line is trimmed away. * Return a pointer to a static buffer. **/ -char* get_next_line(unsigned long *pos, void *file, unsigned long size) +char *get_next_line(unsigned long *pos, void *file, unsigned long size) { static char line[4096]; int skip = 1; @@ -325,8 +327,7 @@ char* get_next_line(unsigned long *pos, void *file, unsigned long size) signed char *p = (signed char *)file + *pos; char *s = line; - for (; *pos < size ; (*pos)++) - { + for (; *pos < size ; (*pos)++) { if (skip && isspace(*p)) { p++; continue; @@ -388,7 +389,9 @@ static int parse_elf(struct elf_info *info, const char *filename) /* Check if file offset is correct */ if (hdr->e_shoff > info->size) { - fatal("section header offset=%lu in file '%s' is bigger then filesize=%lu\n", (unsigned long)hdr->e_shoff, filename, info->size); + fatal("section header offset=%lu in file '%s' is bigger than " + "filesize=%lu\n", (unsigned long)hdr->e_shoff, + filename, info->size); return 0; } @@ -409,7 +412,10 @@ static int parse_elf(struct elf_info *info, const char *filename) const char *secname; if (sechdrs[i].sh_offset > info->size) { - fatal("%s is truncated. sechdrs[i].sh_offset=%lu > sizeof(*hrd)=%lu\n", filename, (unsigned long)sechdrs[i].sh_offset, sizeof(*hdr)); + fatal("%s is truncated. sechdrs[i].sh_offset=%lu > " + "sizeof(*hrd)=%zu\n", filename, + (unsigned long)sechdrs[i].sh_offset, + sizeof(*hdr)); return 0; } secname = secstrings + sechdrs[i].sh_name; @@ -436,9 +442,9 @@ static int parse_elf(struct elf_info *info, const char *filename) info->strtab = (void *)hdr + sechdrs[sechdrs[i].sh_link].sh_offset; } - if (!info->symtab_start) { + if (!info->symtab_start) fatal("%s has no symtab?\n", filename); - } + /* Fix endianness in symbols */ for (sym = info->symtab_start; sym < info->symtab_stop; sym++) { sym->st_shndx = TO_NATIVE(sym->st_shndx); @@ -507,11 +513,13 @@ static void handle_modversions(struct module *mod, struct elf_info *info, #endif if (memcmp(symname, MODULE_SYMBOL_PREFIX, - strlen(MODULE_SYMBOL_PREFIX)) == 0) - mod->unres = alloc_symbol(symname + - strlen(MODULE_SYMBOL_PREFIX), - ELF_ST_BIND(sym->st_info) == STB_WEAK, - mod->unres); + strlen(MODULE_SYMBOL_PREFIX)) == 0) { + mod->unres = + alloc_symbol(symname + + strlen(MODULE_SYMBOL_PREFIX), + ELF_ST_BIND(sym->st_info) == STB_WEAK, + mod->unres); + } break; default: /* All exported symbols */ @@ -580,21 +588,21 @@ static char *get_modinfo(void *modinfo, unsigned long modinfo_len, **/ static int strrcmp(const char *s, const char *sub) { - int slen, sublen; + int slen, sublen; if (!s || !sub) return 1; slen = strlen(s); - sublen = strlen(sub); + sublen = strlen(sub); if ((slen == 0) || (sublen == 0)) return 1; - if (sublen > slen) - return 1; + if (sublen > slen) + return 1; - return memcmp(s + slen - sublen, sub, sublen); + return memcmp(s + slen - sublen, sub, sublen); } /* @@ -671,7 +679,8 @@ static int data_section(const char *name) * the pattern is identified by: * tosec = init or exit section * fromsec = data section - * atsym = *driver, *_template, *_sht, *_ops, *_probe, *probe_one, *_console, *_timer + * atsym = *driver, *_template, *_sht, *_ops, *_probe, + * *probe_one, *_console, *_timer * * Pattern 3: * Whitelist all refereces from .text.head to .init.data @@ -731,15 +740,16 @@ static int secref_whitelist(const char *modname, const char *tosec, return 1; /* Check for pattern 2 */ - if ((init_section(tosec) || exit_section(tosec)) && data_section(fromsec)) + if ((init_section(tosec) || exit_section(tosec)) + && data_section(fromsec)) for (s = pat2sym; *s; s++) if (strrcmp(atsym, *s) == 0) return 1; /* Check for pattern 3 */ if ((strcmp(fromsec, ".text.head") == 0) && - ((strcmp(tosec, ".init.data") == 0) || - (strcmp(tosec, ".init.text") == 0))) + ((strcmp(tosec, ".init.data") == 0) || + (strcmp(tosec, ".init.text") == 0))) return 1; /* Check for pattern 4 */ @@ -816,7 +826,7 @@ static inline int is_valid_name(struct elf_info *elf, Elf_Sym *sym) **/ static void find_symbols_between(struct elf_info *elf, Elf_Addr addr, const char *sec, - Elf_Sym **before, Elf_Sym **after) + Elf_Sym **before, Elf_Sym **after) { Elf_Sym *sym; Elf_Ehdr *hdr = elf->hdr; @@ -842,20 +852,15 @@ static void find_symbols_between(struct elf_info *elf, Elf_Addr addr, if ((addr - sym->st_value) < beforediff) { beforediff = addr - sym->st_value; *before = sym; - } - else if ((addr - sym->st_value) == beforediff) { + } else if ((addr - sym->st_value) == beforediff) { *before = sym; } - } - else - { + } else { if ((sym->st_value - addr) < afterdiff) { afterdiff = sym->st_value - addr; *after = sym; - } - else if ((sym->st_value - addr) == afterdiff) { + } else if ((sym->st_value - addr) == afterdiff) *after = sym; - } } } } @@ -952,12 +957,14 @@ static int addend_arm_rel(struct elf_info *elf, int rsection, Elf_Rela *r) switch (r_typ) { case R_ARM_ABS32: /* From ARM ABI: (S + A) | T */ - r->r_addend = (int)(long)(elf->symtab_start + ELF_R_SYM(r->r_info)); + r->r_addend = (int)(long) + (elf->symtab_start + ELF_R_SYM(r->r_info)); break; case R_ARM_PC24: /* From ARM ABI: ((S + A) | T) - P */ - r->r_addend = (int)(long)(elf->hdr + elf->sechdrs[rsection].sh_offset + - (r->r_offset - elf->sechdrs[rsection].sh_addr)); + r->r_addend = (int)(long)(elf->hdr + + elf->sechdrs[rsection].sh_offset + + (r->r_offset - elf->sechdrs[rsection].sh_addr)); break; default: return 1; @@ -1002,7 +1009,7 @@ static int addend_mips_rel(struct elf_info *elf, int rsection, Elf_Rela *r) **/ static void check_sec_ref(struct module *mod, const char *modname, struct elf_info *elf, - int section(const char*), + int section(const char *), int section_ref_ok(const char *)) { int i; @@ -1022,7 +1029,7 @@ static void check_sec_ref(struct module *mod, const char *modname, if (sechdrs[i].sh_type == SHT_RELA) { Elf_Rela *rela; Elf_Rela *start = (void *)hdr + sechdrs[i].sh_offset; - Elf_Rela *stop = (void*)start + sechdrs[i].sh_size; + Elf_Rela *stop = (void *)start + sechdrs[i].sh_size; name += strlen(".rela"); if (section_ref_ok(name)) continue; @@ -1059,7 +1066,7 @@ static void check_sec_ref(struct module *mod, const char *modname, } else if (sechdrs[i].sh_type == SHT_REL) { Elf_Rel *rel; Elf_Rel *start = (void *)hdr + sechdrs[i].sh_offset; - Elf_Rel *stop = (void*)start + sechdrs[i].sh_size; + Elf_Rel *stop = (void *)start + sechdrs[i].sh_size; name += strlen(".rel"); if (section_ref_ok(name)) continue; @@ -1088,7 +1095,7 @@ static void check_sec_ref(struct module *mod, const char *modname, continue; break; case EM_ARM: - if(addend_arm_rel(elf, i, &r)) + if (addend_arm_rel(elf, i, &r)) continue; break; case EM_MIPS: @@ -1126,32 +1133,32 @@ static int initexit_section_ref_ok(const char *name) const char **s; /* Absolute section names */ const char *namelist1[] = { - "__bug_table", /* used by powerpc for BUG() */ + "__bug_table", /* used by powerpc for BUG() */ "__ex_table", ".altinstructions", - ".cranges", /* used by sh64 */ + ".cranges", /* used by sh64 */ ".fixup", - ".machvec", /* ia64 + powerpc uses these */ + ".machvec", /* ia64 + powerpc uses these */ ".machine.desc", - ".opd", /* See comment [OPD] */ + ".opd", /* See comment [OPD] */ "__dbe_table", ".parainstructions", ".pdr", - ".plt", /* seen on ARCH=um build on x86_64. Harmless */ + ".plt", /* seen on ARCH=um build on x86_64. Harmless */ ".smp_locks", ".stab", ".m68k_fixup", - ".xt.prop", /* xtensa informational section */ - ".xt.lit", /* xtensa informational section */ + ".xt.prop", /* xtensa informational section */ + ".xt.lit", /* xtensa informational section */ NULL }; /* Start of section names */ const char *namelist2[] = { ".debug", ".eh_frame", - ".note", /* ignore ELF notes - may contain anything */ - ".got", /* powerpc - global offset table */ - ".toc", /* powerpc - table of contents */ + ".note", /* ignore ELF notes - may contain anything */ + ".got", /* powerpc - global offset table */ + ".toc", /* powerpc - table of contents */ NULL }; /* part of section name */ @@ -1221,7 +1228,8 @@ static int init_section_ref_ok(const char *name) return 1; /* If section name ends with ".init" we allow references - * as is the case with .initcallN.init, .early_param.init, .taglist.init etc + * as is the case with .initcallN.init, .early_param.init, + * .taglist.init etc */ if (strrcmp(name, ".init") == 0) return 1; @@ -1368,7 +1376,7 @@ static void check_for_gpl_usage(enum export exp, const char *m, const char *s) } } -static void check_for_unused(enum export exp, const char* m, const char* s) +static void check_for_unused(enum export exp, const char *m, const char *s) { const char *e = is_vmlinux(m) ?"":".ko"; @@ -1401,7 +1409,7 @@ static void check_exports(struct module *mod) if (!mod->gpl_compatible) check_for_gpl_usage(exp->export, basename, exp->name); check_for_unused(exp->export, basename, exp->name); - } + } } /** @@ -1465,9 +1473,8 @@ static int add_versions(struct buffer *b, struct module *mod) buf_printf(b, "__attribute__((section(\"__versions\"))) = {\n"); for (s = mod->unres; s; s = s->next) { - if (!s->module) { + if (!s->module) continue; - } if (!s->crc_valid) { warn("\"%s\" [%s.ko] has no CRC!\n", s->name, mod->name); @@ -1488,9 +1495,8 @@ static void add_depends(struct buffer *b, struct module *mod, struct module *m; int first = 1; - for (m = modules; m; m = m->next) { + for (m = modules; m; m = m->next) m->seen = is_vmlinux(m->name); - } buf_printf(b, "\n"); buf_printf(b, "static const char __module_depends[]\n"); @@ -1506,7 +1512,8 @@ static void add_depends(struct buffer *b, struct module *mod, continue; s->module->seen = 1; - if ((p = strrchr(s->module->name, '/')) != NULL) + p = strrchr(s->module->name, '/'); + if (p) p++; else p = s->module->name; @@ -1578,7 +1585,7 @@ static void read_dump(const char *fname, unsigned int kernel) void *file = grab_file(fname, &size); char *line; - if (!file) + if (!file) /* No symbol versions, silently ignore */ return; @@ -1601,11 +1608,10 @@ static void read_dump(const char *fname, unsigned int kernel) crc = strtoul(line, &d, 16); if (*symname == '\0' || *modname == '\0' || *d != '\0') goto fail; - - if (!(mod = find_module(modname))) { - if (is_vmlinux(modname)) { + mod = find_module(modname); + if (!mod) { + if (is_vmlinux(modname)) have_vmlinux = 1; - } mod = new_module(NOFAIL(strdup(modname))); mod->skip = 1; } @@ -1662,31 +1668,31 @@ int main(int argc, char **argv) int err; while ((opt = getopt(argc, argv, "i:I:mso:aw")) != -1) { - switch(opt) { - case 'i': - kernel_read = optarg; - break; - case 'I': - module_read = optarg; - external_module = 1; - break; - case 'm': - modversions = 1; - break; - case 'o': - dump_write = optarg; - break; - case 'a': - all_versions = 1; - break; - case 's': - vmlinux_section_warnings = 0; - break; - case 'w': - warn_unresolved = 1; - break; - default: - exit(1); + switch (opt) { + case 'i': + kernel_read = optarg; + break; + case 'I': + module_read = optarg; + external_module = 1; + break; + case 'm': + modversions = 1; + break; + case 'o': + dump_write = optarg; + break; + case 'a': + all_versions = 1; + break; + case 's': + vmlinux_section_warnings = 0; + break; + case 'w': + warn_unresolved = 1; + break; + default: + exit(1); } } @@ -1695,9 +1701,8 @@ int main(int argc, char **argv) if (module_read) read_dump(module_read, 0); - while (optind < argc) { + while (optind < argc) read_symbols(argv[optind++]); - } for (mod = modules; mod; mod = mod->next) { if (mod->skip) |
