diff options
author | Ingo Molnar <mingo@elte.hu> | 2009-06-07 12:22:15 +0200 |
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committer | Ingo Molnar <mingo@elte.hu> | 2009-06-07 12:22:15 +0200 |
commit | 5f4457a4f62cc9d78e04c0eb12ff0540899aad89 (patch) | |
tree | 0b973d527ea6b2ae31e08da0746b4965a3c5a6d8 /scripts/mod/modpost.c | |
parent | 9b94b3a19b13e094c10f65f24bc358f6ffe4eacd (diff) | |
parent | b87297fb405ef13cac375f202d114323b076a56d (diff) |
Merge branch 'linus' into x86/cpu
Diffstat (limited to 'scripts/mod/modpost.c')
-rw-r--r-- | scripts/mod/modpost.c | 122 |
1 files changed, 56 insertions, 66 deletions
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index 8cc70612984..161b7846733 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -384,11 +384,19 @@ static int parse_elf(struct elf_info *info, const char *filename) return 0; } /* Fix endianness in ELF header */ - hdr->e_shoff = TO_NATIVE(hdr->e_shoff); - hdr->e_shstrndx = TO_NATIVE(hdr->e_shstrndx); - hdr->e_shnum = TO_NATIVE(hdr->e_shnum); - hdr->e_machine = TO_NATIVE(hdr->e_machine); - hdr->e_type = TO_NATIVE(hdr->e_type); + 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); sechdrs = (void *)hdr + hdr->e_shoff; info->sechdrs = sechdrs; @@ -402,13 +410,16 @@ static int parse_elf(struct elf_info *info, const char *filename) /* Fix endianness in section headers */ for (i = 0; i < hdr->e_shnum; i++) { - sechdrs[i].sh_type = TO_NATIVE(sechdrs[i].sh_type); - 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_name = TO_NATIVE(sechdrs[i].sh_name); - sechdrs[i].sh_info = TO_NATIVE(sechdrs[i].sh_info); - sechdrs[i].sh_addr = TO_NATIVE(sechdrs[i].sh_addr); + 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); } /* Find symbol table. */ for (i = 1; i < hdr->e_shnum; i++) { @@ -716,41 +727,37 @@ int match(const char *sym, const char * const pat[]) /* sections that we do not want to do full section mismatch check on */ static const char *section_white_list[] = - { ".debug*", ".stab*", ".note*", ".got*", ".toc*", NULL }; +{ + ".comment*", + ".debug*", + ".mdebug*", /* alpha, score, mips etc. */ + ".pdr", /* alpha, score, mips etc. */ + ".stab*", + ".note*", + ".got*", + ".toc*", + NULL +}; /* - * Is this section one we do not want to check? - * This is often debug sections. - * If we are going to check this section then - * test if section name ends with a dot and a number. - * This is used to find sections where the linker have - * appended a dot-number to make the name unique. + * This is used to find sections missing the SHF_ALLOC flag. * The cause of this is often a section specified in assembler - * without "ax" / "aw" and the same section used in .c - * code where gcc add these. + * without "ax" / "aw". */ -static int check_section(const char *modname, const char *sec) -{ - const char *e = sec + strlen(sec) - 1; - if (match(sec, section_white_list)) - return 1; - - if (*e && isdigit(*e)) { - /* consume all digits */ - while (*e && e != sec && isdigit(*e)) - e--; - if (*e == '.' && !strstr(sec, ".linkonce")) { - warn("%s (%s): unexpected section name.\n" - "The (.[number]+) following section name are " - "ld generated and not expected.\n" - "Did you forget to use \"ax\"/\"aw\" " - "in a .S file?\n" - "Note that for example <linux/init.h> contains\n" - "section definitions for use in .S files.\n\n", - modname, sec); - } +static void check_section(const char *modname, struct elf_info *elf, + Elf_Shdr *sechdr) +{ + 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.\n" + "Did you forget to use \"ax\"/\"aw\" in a .S file?\n" + "Note that for example <linux/init.h> contains\n" + "section definitions for use in .S files.\n\n", + modname, sec); } - return 0; } @@ -794,15 +801,6 @@ static const char *init_exit_sections[] = /* data section */ static const char *data_sections[] = { DATA_SECTIONS, NULL }; -/* sections that may refer to an init/exit section with no warning */ -static const char *initref_sections[] = -{ - ".text.init.refok*", - ".exit.text.refok*", - ".data.init.refok*", - NULL -}; - /* symbols in .data that may refer to init/exit sections */ static const char *symbol_white_list[] = @@ -915,11 +913,6 @@ static int section_mismatch(const char *fromsec, const char *tosec) /** * Whitelist to allow certain references to pass with no warning. * - * Pattern 0: - * Do not warn if funtion/data are marked with __init_refok/__initdata_refok. - * The pattern is identified by: - * fromsec = .text.init.refok* | .data.init.refok* - * * Pattern 1: * If a module parameter is declared __initdata and permissions=0 * then this is legal despite the warning generated. @@ -942,8 +935,7 @@ static int section_mismatch(const char *fromsec, const char *tosec) * *probe_one, *_console, *_timer * * Pattern 3: - * Whitelist all refereces from .text.head to .init.data - * Whitelist all refereces from .text.head to .init.text + * Whitelist all references from .head.text to any init section * * Pattern 4: * Some symbols belong to init section but still it is ok to reference @@ -958,10 +950,6 @@ static int section_mismatch(const char *fromsec, const char *tosec) static int secref_whitelist(const char *fromsec, const char *fromsym, const char *tosec, const char *tosym) { - /* Check for pattern 0 */ - if (match(fromsec, initref_sections)) - return 0; - /* Check for pattern 1 */ if (match(tosec, init_data_sections) && match(fromsec, data_sections) && @@ -1377,7 +1365,7 @@ static void section_rela(const char *modname, struct elf_info *elf, fromsec = sech_name(elf, sechdr); fromsec += strlen(".rela"); /* if from section (name) is know good then skip it */ - if (check_section(modname, fromsec)) + if (match(fromsec, section_white_list)) return; for (rela = start; rela < stop; rela++) { @@ -1421,7 +1409,7 @@ static void section_rel(const char *modname, struct elf_info *elf, fromsec = sech_name(elf, sechdr); fromsec += strlen(".rel"); /* if from section (name) is know good then skip it */ - if (check_section(modname, fromsec)) + if (match(fromsec, section_white_list)) return; for (rel = start; rel < stop; rel++) { @@ -1484,6 +1472,7 @@ static void check_sec_ref(struct module *mod, const char *modname, /* Walk through all sections */ for (i = 0; i < elf->hdr->e_shnum; i++) { + check_section(modname, elf, &elf->sechdrs[i]); /* We want to process only relocation sections and not .init */ if (sechdrs[i].sh_type == SHT_RELA) section_rela(modname, elf, &elf->sechdrs[i]); @@ -1913,7 +1902,7 @@ static void read_dump(const char *fname, unsigned int kernel) if (!mod) { if (is_vmlinux(modname)) have_vmlinux = 1; - mod = new_module(NOFAIL(strdup(modname))); + mod = new_module(modname); mod->skip = 1; } s = sym_add_exported(symname, mod, export_no(export)); @@ -1997,7 +1986,7 @@ static void read_markers(const char *fname) mod = find_module(modname); if (!mod) { - mod = new_module(NOFAIL(strdup(modname))); + mod = new_module(modname); mod->skip = 1; } if (is_vmlinux(modname)) { @@ -2008,6 +1997,7 @@ static void read_markers(const char *fname) if (!mod->skip) add_marker(mod, marker, fmt); } + release_file(file, size); return; fail: fatal("parse error in markers list file\n"); |