From: Ram Pai This patch provides the ability to identify the export-type of each exported symbols. NOTE: It updates the Module.symvers file with the additional information as shown below. 0x0f8b92af platform_device_add_resources vmlinux EXPORT_SYMBOL_GPL 0xcf7efb2a ethtool_op_set_tx_csum vmlinux EXPORT_SYMBOL Signed-off-by: Andreas Gruenbacher Signed-off-by: Ram Pai Signed-off-by: Avantika Mathur Cc: Sam Ravnborg Signed-off-by: Andrew Morton --- scripts/mod/modpost.c | 63 +++++++++++++++++++++++++++++----------- 1 file changed, 47 insertions(+), 16 deletions(-) diff -puN scripts/mod/modpost.c~kbuild-export-type-enhancement-to-modpostc scripts/mod/modpost.c --- devel/scripts/mod/modpost.c~kbuild-export-type-enhancement-to-modpostc 2006-05-19 15:59:48.000000000 -0700 +++ devel-akpm/scripts/mod/modpost.c 2006-05-19 15:59:48.000000000 -0700 @@ -18,6 +18,10 @@ int modversions = 0; /* Warn about undefined symbols? (do so if we have vmlinux) */ int have_vmlinux = 0; + +/* elf section number for gpl symbols */ +int ksymtab_gpl; + /* Is CONFIG_MODULE_SRCVERSION_ALL set? */ static int all_versions = 0; /* If we are modposting external module set to 1 */ @@ -118,6 +122,7 @@ struct symbol { unsigned int kernel:1; /* 1 if symbol is from kernel * (only for external modules) **/ unsigned int preloaded:1; /* 1 if symbol from Module.symvers */ + int export_type; char name[0]; }; @@ -153,7 +158,8 @@ static struct symbol *alloc_symbol(const } /* For the hash of exported symbols */ -static struct symbol *new_symbol(const char *name, struct module *module) +static struct symbol *new_symbol(const char *name, struct module *module, + int export_type) { unsigned int hash; struct symbol *new; @@ -161,6 +167,7 @@ static struct symbol *new_symbol(const c hash = tdb_hash(name) % SYMBOL_HASH_SIZE; new = symbolhash[hash] = alloc_symbol(name, 0, symbolhash[hash]); new->module = module; + new->export_type = export_type; return new; } @@ -183,12 +190,13 @@ static struct symbol *find_symbol(const * Add an exported symbol - it may have already been added without a * CRC, in this case just update the CRC **/ -static struct symbol *sym_add_exported(const char *name, struct module *mod) +static struct symbol *sym_add_exported(const char *name, struct module *mod, + int export_type) { struct symbol *s = find_symbol(name); if (!s) { - s = new_symbol(name, mod); + s = new_symbol(name, mod, export_type); } else { if (!s->preloaded) { warn("%s: '%s' exported twice. Previous export " @@ -204,12 +212,12 @@ static struct symbol *sym_add_exported(c } static void sym_update_crc(const char *name, struct module *mod, - unsigned int crc) + unsigned int crc, int export_type) { struct symbol *s = find_symbol(name); if (!s) - s = new_symbol(name, mod); + s = new_symbol(name, mod, export_type); s->crc = crc; s->crc_valid = 1; } @@ -305,17 +313,23 @@ static void parse_elf(struct elf_info *i sechdrs[i].sh_link = TO_NATIVE(sechdrs[i].sh_link); sechdrs[i].sh_name = TO_NATIVE(sechdrs[i].sh_name); } + + ksymtab_gpl = -1; /* Find symbol table. */ for (i = 1; i < hdr->e_shnum; i++) { const char *secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; + const char *secname; if (sechdrs[i].sh_offset > info->size) goto truncated; - if (strcmp(secstrings+sechdrs[i].sh_name, ".modinfo") == 0) { + secname = secstrings+sechdrs[i].sh_name; + if (strcmp(secname, ".modinfo") == 0) { info->modinfo = (void *)hdr + sechdrs[i].sh_offset; info->modinfo_len = sechdrs[i].sh_size; - } + } else if (strcmp(secname, "__ksymtab_gpl") == 0) + ksymtab_gpl = i; + if (sechdrs[i].sh_type != SHT_SYMTAB) continue; @@ -353,6 +367,7 @@ static void handle_modversions(struct mo Elf_Sym *sym, const char *symname) { unsigned int crc; + unsigned int export_type = (sym->st_shndx == ksymtab_gpl); switch (sym->st_shndx) { case SHN_COMMON: @@ -362,7 +377,8 @@ static void handle_modversions(struct mo /* CRC'd symbol */ if (memcmp(symname, CRC_PFX, strlen(CRC_PFX)) == 0) { crc = (unsigned int) sym->st_value; - sym_update_crc(symname + strlen(CRC_PFX), mod, crc); + sym_update_crc(symname + strlen(CRC_PFX), mod, crc, + export_type); } break; case SHN_UNDEF: @@ -406,7 +422,8 @@ static void handle_modversions(struct mo default: /* All exported symbols */ if (memcmp(symname, KSYMTAB_PFX, strlen(KSYMTAB_PFX)) == 0) { - sym_add_exported(symname + strlen(KSYMTAB_PFX), mod); + sym_add_exported(symname + strlen(KSYMTAB_PFX), mod, + export_type); } if (strcmp(symname, MODULE_SYMBOL_PREFIX "init_module") == 0) mod->has_init = 1; @@ -1153,10 +1170,11 @@ static void read_dump(const char *fname, return; while ((line = get_next_line(&pos, file, size))) { - char *symname, *modname, *d; + char *symname, *modname, *d, *export; unsigned int crc; struct module *mod; struct symbol *s; + unsigned int export_type = 0; if (!(symname = strchr(line, '\t'))) goto fail; @@ -1164,10 +1182,21 @@ static void read_dump(const char *fname, if (!(modname = strchr(symname, '\t'))) goto fail; *modname++ = '\0'; - if (strchr(modname, '\t')) + if (!(export = strchr(modname, '\t'))) + goto fail; + *export++ = '\0'; + if (strchr(export, '\t')) goto fail; crc = strtoul(line, &d, 16); - if (*symname == '\0' || *modname == '\0' || *d != '\0') + if (*symname == '\0' || *modname == '\0' || *export == '\0' || + *d != '\0') + goto fail; + + if ((strcmp(export, "EXPORT_SYMBOL_GPL"))) + export_type = 1; + else if(strcmp(export, "EXPORT_SYMBOL") == 0) + export_type = 0; + else goto fail; if (!(mod = find_module(modname))) { @@ -1177,10 +1206,10 @@ static void read_dump(const char *fname, mod = new_module(NOFAIL(strdup(modname))); mod->skip = 1; } - s = sym_add_exported(symname, mod); + s = sym_add_exported(symname, mod, export_type); s->kernel = kernel; s->preloaded = 1; - sym_update_crc(symname, mod, crc); + sym_update_crc(symname, mod, crc, export_type); } return; fail: @@ -1210,9 +1239,11 @@ static void write_dump(const char *fname symbol = symbolhash[n]; while (symbol) { if (dump_sym(symbol)) - buf_printf(&buf, "0x%08x\t%s\t%s\n", + buf_printf(&buf, "0x%08x\t%s\t%s\t%s\n", symbol->crc, symbol->name, - symbol->module->name); + symbol->module->name, + (symbol->export_type? + "EXPORT_SYMBOL_GPL" : "EXPORT_SYMBOL")); symbol = symbol->next; } } _