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scripts/mod/modpost.c
56.1 KB
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/* Postprocess module symbol versions * * Copyright 2003 Kai Germaschewski * Copyright 2002-2004 Rusty Russell, IBM Corporation |
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* Copyright 2006-2008 Sam Ravnborg |
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* 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 ... */ |
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#define _GNU_SOURCE #include <stdio.h> |
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#include <ctype.h> |
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#include <string.h> |
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#include "modpost.h" |
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#include "../../include/generated/autoconf.h" |
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#include "../../include/linux/license.h" |
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/* 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 |
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/* 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; |
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/* If we are modposting external module set to 1 */ static int external_module = 0; |
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/* Warn about section mismatch in vmlinux if set to 1 */ static int vmlinux_section_warnings = 1; |
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/* Only warn about unresolved symbols */ static int warn_unresolved = 0; |
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/* How a symbol is exported */ |
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static int sec_mismatch_count = 0; static int sec_mismatch_verbose = 1; |
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enum export { export_plain, export_unused, export_gpl, export_unused_gpl, export_gpl_future, export_unknown }; |
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#define PRINTF __attribute__ ((format (printf, 1, 2))) PRINTF void fatal(const char *fmt, ...) |
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{ va_list arglist; fprintf(stderr, "FATAL: "); va_start(arglist, fmt); vfprintf(stderr, fmt, arglist); va_end(arglist); exit(1); } |
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PRINTF void warn(const char *fmt, ...) |
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{ va_list arglist; fprintf(stderr, "WARNING: "); va_start(arglist, fmt); vfprintf(stderr, fmt, arglist); va_end(arglist); } |
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PRINTF void merror(const char *fmt, ...) |
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{ va_list arglist; fprintf(stderr, "ERROR: "); va_start(arglist, fmt); vfprintf(stderr, fmt, arglist); va_end(arglist); } |
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static int is_vmlinux(const char *modname) { const char *myname; |
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myname = strrchr(modname, '/'); if (myname) |
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myname++; else myname = modname; |
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return (strcmp(myname, "vmlinux") == 0) || (strcmp(myname, "vmlinux.o") == 0); |
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} |
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void *do_nofail(void *ptr, const char *expr) { |
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if (!ptr) |
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fatal("modpost: Memory allocation failure: %s. ", expr); |
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return ptr; } /* A list of all modules we processed */ |
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static struct module *modules; |
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static struct module *find_module(char *modname) |
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{ struct module *mod; for (mod = modules; mod; mod = mod->next) if (strcmp(mod->name, modname) == 0) break; return mod; } |
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static struct module *new_module(char *modname) |
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{ struct module *mod; char *p, *s; |
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mod = NOFAIL(malloc(sizeof(*mod))); memset(mod, 0, sizeof(*mod)); p = NOFAIL(strdup(modname)); /* strip trailing .o */ |
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s = strrchr(p, '.'); if (s != NULL) |
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if (strcmp(s, ".o") == 0) *s = '\0'; /* add to list */ mod->name = p; |
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mod->gpl_compatible = -1; |
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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; |
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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) **/ |
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unsigned int preloaded:1; /* 1 if symbol from Module.symvers */ |
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enum export export; /* Type of export */ |
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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. */ |
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for (value = 0x238F13AF * strlen(name), i = 0; name[i]; i++) |
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value = (value + (((unsigned char *)name)[i] << (i*5 % 24))); return (1103515243 * value + 12345); } |
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/** * 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) |
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{ 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 */ |
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static struct symbol *new_symbol(const char *name, struct module *module, enum export export) |
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{ 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; |
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new->export = export; |
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return new; |
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} |
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static struct symbol *find_symbol(const char *name) |
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{ struct symbol *s; /* For our purposes, .foo matches foo. PPC64 needs this. */ if (name[0] == '.') name++; |
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for (s = symbolhash[tdb_hash(name) % SYMBOL_HASH_SIZE]; s; s = s->next) { |
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if (strcmp(s->name, name) == 0) return s; } return NULL; } |
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static struct { const char *str; enum export export; } export_list[] = { { .str = "EXPORT_SYMBOL", .export = export_plain }, |
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{ .str = "EXPORT_UNUSED_SYMBOL", .export = export_unused }, |
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{ .str = "EXPORT_SYMBOL_GPL", .export = export_gpl }, |
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{ .str = "EXPORT_UNUSED_SYMBOL_GPL", .export = export_unused_gpl }, |
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{ .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; } |
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static enum export export_no(const char *s) |
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{ int i; |
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|
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if (!s) return export_unknown; |
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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; } |
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static const char *sec_name(struct elf_info *elf, int secindex); #define strstarts(str, prefix) (strncmp(str, prefix, strlen(prefix)) == 0) static enum export export_from_secname(struct elf_info *elf, unsigned int sec) { const char *secname = sec_name(elf, sec); if (strstarts(secname, "___ksymtab+")) return export_plain; else if (strstarts(secname, "___ksymtab_unused+")) return export_unused; else if (strstarts(secname, "___ksymtab_gpl+")) return export_gpl; else if (strstarts(secname, "___ksymtab_unused_gpl+")) return export_unused_gpl; else if (strstarts(secname, "___ksymtab_gpl_future+")) return export_gpl_future; else return export_unknown; } |
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static enum export export_from_sec(struct elf_info *elf, unsigned int sec) |
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{ if (sec == elf->export_sec) return export_plain; |
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else if (sec == elf->export_unused_sec) return export_unused; |
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else if (sec == elf->export_gpl_sec) return export_gpl; |
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else if (sec == elf->export_unused_gpl_sec) return export_unused_gpl; |
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else if (sec == elf->export_gpl_future_sec) return export_gpl_future; else return export_unknown; } |
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/** * Add an exported symbol - it may have already been added without a * CRC, in this case just update the CRC **/ |
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static struct symbol *sym_add_exported(const char *name, struct module *mod, enum export export) |
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{ struct symbol *s = find_symbol(name); if (!s) { |
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s = new_symbol(name, mod, export); |
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} else { if (!s->preloaded) { |
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warn("%s: '%s' exported twice. Previous export " |
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"was in %s%s ", mod->name, name, s->module->name, is_vmlinux(s->module->name) ?"":".ko"); |
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} else { /* In case Modules.symvers was out of date */ s->module = mod; |
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} |
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} |
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s->preloaded = 0; |
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s->vmlinux = is_vmlinux(mod->name); s->kernel = 0; |
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s->export = export; |
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return s; } static void sym_update_crc(const char *name, struct module *mod, |
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unsigned int crc, enum export export) |
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{ struct symbol *s = find_symbol(name); if (!s) |
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s = new_symbol(name, mod, export); |
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s->crc = crc; s->crc_valid = 1; |
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} |
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void *grab_file(const char *filename, unsigned long *size) |
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{ 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; } |
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/** * 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. **/ |
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char *get_next_line(unsigned long *pos, void *file, unsigned long size) |
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{ static char line[4096]; int skip = 1; size_t len = 0; signed char *p = (signed char *)file + *pos; char *s = line; |
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for (; *pos < size ; (*pos)++) { |
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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; } |
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void release_file(void *file, unsigned long size) |
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{ munmap(file, size); } |
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static int parse_elf(struct elf_info *info, const char *filename) |
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{ unsigned int i; |
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Elf_Ehdr *hdr; |
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Elf_Shdr *sechdrs; Elf_Sym *sym; |
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const char *secstrings; unsigned int symtab_idx = ~0U, symtab_shndx_idx = ~0U; |
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hdr = grab_file(filename, &info->size); if (!hdr) { perror(filename); |
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exit(1); |
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} info->hdr = hdr; |
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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; } |
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/* Fix endianness in ELF header */ |
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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); |
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sechdrs = (void *)hdr + hdr->e_shoff; info->sechdrs = sechdrs; |
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/* Check if file offset is correct */ if (hdr->e_shoff > info->size) { |
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fatal("section header offset=%lu in file '%s' is bigger than " "filesize=%lu ", (unsigned long)hdr->e_shoff, filename, info->size); |
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return 0; } |
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if (hdr->e_shnum == SHN_UNDEF) { |
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/* * There are more than 64k sections, * read count from .sh_size. |
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*/ info->num_sections = TO_NATIVE(sechdrs[0].sh_size); } else { info->num_sections = hdr->e_shnum; } if (hdr->e_shstrndx == SHN_XINDEX) { |
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info->secindex_strings = TO_NATIVE(sechdrs[0].sh_link); |
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} else { info->secindex_strings = hdr->e_shstrndx; } |
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/* Fix endianness in section headers */ |
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for (i = 0; i < info->num_sections; i++) { |
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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); |
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} /* Find symbol table. */ |
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secstrings = (void *)hdr + sechdrs[info->secindex_strings].sh_offset; for (i = 1; i < info->num_sections; i++) { |
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const char *secname; |
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int nobits = sechdrs[i].sh_type == SHT_NOBITS; |
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if (!nobits && sechdrs[i].sh_offset > info->size) { |
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fatal("%s is truncated. sechdrs[i].sh_offset=%lu > " "sizeof(*hrd)=%zu ", filename, (unsigned long)sechdrs[i].sh_offset, sizeof(*hdr)); |
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return 0; } |
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secname = secstrings + sechdrs[i].sh_name; if (strcmp(secname, ".modinfo") == 0) { |
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if (nobits) fatal("%s has NOBITS .modinfo ", filename); |
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info->modinfo = (void *)hdr + sechdrs[i].sh_offset; info->modinfo_len = sechdrs[i].sh_size; |
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} else if (strcmp(secname, "__ksymtab") == 0) info->export_sec = i; |
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else if (strcmp(secname, "__ksymtab_unused") == 0) info->export_unused_sec = i; |
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else if (strcmp(secname, "__ksymtab_gpl") == 0) info->export_gpl_sec = i; |
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else if (strcmp(secname, "__ksymtab_unused_gpl") == 0) info->export_unused_gpl_sec = i; |
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else if (strcmp(secname, "__ksymtab_gpl_future") == 0) info->export_gpl_future_sec = i; |
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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; |
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sh_link_idx = sechdrs[i].sh_link; |
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info->strtab = (void *)hdr + sechdrs[sh_link_idx].sh_offset; } |
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1ce53adf1 modpost: support ... |
494 495 496 497 498 499 500 501 |
/* 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 |
502 |
} |
df578e7d8 kbuild: clean up ... |
503 |
if (!info->symtab_start) |
cb80514d9 kbuild: use warn(... |
504 505 |
fatal("%s has no symtab? ", filename); |
df578e7d8 kbuild: clean up ... |
506 |
|
1da177e4c Linux-2.6.12-rc2 |
507 508 509 510 511 512 513 |
/* 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 ... |
514 515 516 |
if (symtab_shndx_idx != ~0U) { Elf32_Word *p; |
6845756b2 modpost: Update 6... |
517 |
if (symtab_idx != sechdrs[symtab_shndx_idx].sh_link) |
1ce53adf1 modpost: support ... |
518 519 |
fatal("%s: SYMTAB_SHNDX has bad sh_link: %u!=%u ", |
6845756b2 modpost: Update 6... |
520 |
filename, sechdrs[symtab_shndx_idx].sh_link, |
1ce53adf1 modpost: support ... |
521 522 523 524 525 526 |
symtab_idx); /* Fix endianness */ for (p = info->symtab_shndx_start; p < info->symtab_shndx_stop; p++) *p = TO_NATIVE(*p); } |
85bd2fddd kbuild: fix secti... |
527 |
return 1; |
1da177e4c Linux-2.6.12-rc2 |
528 |
} |
5c3ead8c7 kbuild: apply Cod... |
529 |
static void parse_elf_finish(struct elf_info *info) |
1da177e4c Linux-2.6.12-rc2 |
530 531 532 |
{ release_file(info->hdr, info->size); } |
4d7365d66 kbuild: ignore po... |
533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 |
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... |
548 549 550 551 552 |
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... |
553 554 555 |
/* Do not ignore this symbol */ return 0; } |
f7b05e64b kbuild: Fix bug i... |
556 557 |
#define CRC_PFX MODULE_SYMBOL_PREFIX "__crc_" #define KSYMTAB_PFX MODULE_SYMBOL_PREFIX "__ksymtab_" |
1da177e4c Linux-2.6.12-rc2 |
558 |
|
5c3ead8c7 kbuild: apply Cod... |
559 560 |
static void handle_modversions(struct module *mod, struct elf_info *info, Elf_Sym *sym, const char *symname) |
1da177e4c Linux-2.6.12-rc2 |
561 562 |
{ unsigned int crc; |
62a263561 modpost: Fix modp... |
563 564 565 566 567 568 |
enum export export; if (!is_vmlinux(mod->name) && strncmp(symname, "__ksymtab", 9) == 0) export = export_from_secname(info, get_secindex(info, sym)); else export = export_from_sec(info, get_secindex(info, sym)); |
1da177e4c Linux-2.6.12-rc2 |
569 570 571 |
switch (sym->st_shndx) { case SHN_COMMON: |
cb80514d9 kbuild: use warn(... |
572 573 |
warn("\"%s\" [%s] is COMMON symbol ", symname, mod->name); |
1da177e4c Linux-2.6.12-rc2 |
574 575 576 |
break; case SHN_ABS: /* CRC'd symbol */ |
8d99513c1 modpost: fix segf... |
577 |
if (strncmp(symname, CRC_PFX, strlen(CRC_PFX)) == 0) { |
1da177e4c Linux-2.6.12-rc2 |
578 |
crc = (unsigned int) sym->st_value; |
bd5cbcedf kbuild: export-ty... |
579 580 |
sym_update_crc(symname + strlen(CRC_PFX), mod, crc, export); |
1da177e4c Linux-2.6.12-rc2 |
581 582 583 584 585 586 587 |
} 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... |
588 |
if (ignore_undef_symbol(info, symname)) |
1da177e4c Linux-2.6.12-rc2 |
589 |
break; |
8d5290149 [SPARC]: Deal wit... |
590 591 592 593 594 595 |
/* 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 |
596 597 598 |
if (info->hdr->e_machine == EM_SPARC || info->hdr->e_machine == EM_SPARCV9) { /* Ignore register directives. */ |
8d5290149 [SPARC]: Deal wit... |
599 |
if (ELF_ST_TYPE(sym->st_info) == STT_SPARC_REGISTER) |
1da177e4c Linux-2.6.12-rc2 |
600 |
break; |
62070fa42 kbuild: kill trai... |
601 602 603 604 605 606 |
if (symname[0] == '.') { char *munged = strdup(symname); munged[0] = '_'; munged[1] = toupper(munged[1]); symname = munged; } |
1da177e4c Linux-2.6.12-rc2 |
607 608 |
} #endif |
62070fa42 kbuild: kill trai... |
609 |
|
1da177e4c Linux-2.6.12-rc2 |
610 |
if (memcmp(symname, MODULE_SYMBOL_PREFIX, |
df578e7d8 kbuild: clean up ... |
611 612 613 614 615 616 617 |
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 |
618 619 620 |
break; default: /* All exported symbols */ |
8d99513c1 modpost: fix segf... |
621 |
if (strncmp(symname, KSYMTAB_PFX, strlen(KSYMTAB_PFX)) == 0) { |
bd5cbcedf kbuild: export-ty... |
622 623 |
sym_add_exported(symname + strlen(KSYMTAB_PFX), mod, export); |
1da177e4c Linux-2.6.12-rc2 |
624 625 626 627 628 629 630 631 |
} 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... |
632 633 634 |
/** * Parse tag=value strings from .modinfo section **/ |
1da177e4c Linux-2.6.12-rc2 |
635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 |
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... |
652 653 |
static char *get_next_modinfo(void *modinfo, unsigned long modinfo_len, const char *tag, char *info) |
1da177e4c Linux-2.6.12-rc2 |
654 655 656 657 |
{ char *p; unsigned int taglen = strlen(tag); unsigned long size = modinfo_len; |
b817f6fef kbuild: check lic... |
658 659 660 661 |
if (info) { size -= info - (char *)modinfo; modinfo = next_string(info, &size); } |
1da177e4c Linux-2.6.12-rc2 |
662 663 664 665 666 667 |
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... |
668 669 670 671 672 673 |
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... |
674 |
/** |
4c8fbca58 kbuild: whitelist... |
675 676 677 678 679 |
* 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 ... |
680 |
int slen, sublen; |
62070fa42 kbuild: kill trai... |
681 |
|
4c8fbca58 kbuild: whitelist... |
682 683 |
if (!s || !sub) return 1; |
62070fa42 kbuild: kill trai... |
684 |
|
4c8fbca58 kbuild: whitelist... |
685 |
slen = strlen(s); |
df578e7d8 kbuild: clean up ... |
686 |
sublen = strlen(sub); |
62070fa42 kbuild: kill trai... |
687 |
|
4c8fbca58 kbuild: whitelist... |
688 689 |
if ((slen == 0) || (sublen == 0)) return 1; |
df578e7d8 kbuild: clean up ... |
690 691 |
if (sublen > slen) return 1; |
4c8fbca58 kbuild: whitelist... |
692 |
|
df578e7d8 kbuild: clean up ... |
693 |
return memcmp(s + slen - sublen, sub, sublen); |
4c8fbca58 kbuild: whitelist... |
694 |
} |
ff13f9269 kbuild: introduce... |
695 696 |
static const char *sym_name(struct elf_info *elf, Elf_Sym *sym) { |
58fb0d4f2 kbuild: simplifie... |
697 698 699 |
if (sym) return elf->strtab + sym->st_name; else |
f666751a0 kbuild/modpost: i... |
700 |
return "(unknown)"; |
ff13f9269 kbuild: introduce... |
701 |
} |
1ce53adf1 modpost: support ... |
702 |
static const char *sec_name(struct elf_info *elf, int secindex) |
ff13f9269 kbuild: introduce... |
703 704 705 |
{ Elf_Shdr *sechdrs = elf->sechdrs; return (void *)elf->hdr + |
1ce53adf1 modpost: support ... |
706 707 |
elf->sechdrs[elf->secindex_strings].sh_offset + sechdrs[secindex].sh_name; |
ff13f9269 kbuild: introduce... |
708 709 710 711 712 |
} static const char *sech_name(struct elf_info *elf, Elf_Shdr *sechdr) { return (void *)elf->hdr + |
1ce53adf1 modpost: support ... |
713 714 |
elf->sechdrs[elf->secindex_strings].sh_offset + sechdr->sh_name; |
ff13f9269 kbuild: introduce... |
715 |
} |
10668220a kbuild: introduce... |
716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 |
/* 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... |
736 |
* "*foo" will match a string that ends with "foo" |
10668220a kbuild: introduce... |
737 738 739 740 741 742 |
* "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... |
743 |
static int match(const char *sym, const char * const pat[]) |
10668220a kbuild: introduce... |
744 745 746 747 748 |
{ const char *p; while (*pat) { p = *pat++; const char *endp = p + strlen(p) - 1; |
6c5bd235b kbuild: check sec... |
749 750 751 752 753 |
/* "*foo" */ if (*p == '*') { if (strrcmp(sym, p + 1) == 0) return 1; } |
10668220a kbuild: introduce... |
754 |
/* "foo*" */ |
6c5bd235b kbuild: check sec... |
755 |
else if (*endp == '*') { |
10668220a kbuild: introduce... |
756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 |
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... |
775 776 |
/* sections that we do not want to do full section mismatch check on */ static const char *section_white_list[] = |
4391ed6aa kbuild, modpost: ... |
777 778 779 |
{ ".comment*", ".debug*", |
1121584f5 modpost: Put .zde... |
780 |
".zdebug*", /* Compressed debug sections. */ |
019fca84e MN10300: Permit .... |
781 |
".GCC-command-line", /* mn10300 */ |
4391ed6aa kbuild, modpost: ... |
782 783 784 785 786 787 788 789 |
".mdebug*", /* alpha, score, mips etc. */ ".pdr", /* alpha, score, mips etc. */ ".stab*", ".note*", ".got*", ".toc*", NULL }; |
10668220a kbuild: introduce... |
790 |
|
e241a6303 kbuild: warn abou... |
791 |
/* |
b614a697d kbuild, modpost: ... |
792 |
* This is used to find sections missing the SHF_ALLOC flag. |
e241a6303 kbuild: warn abou... |
793 |
* The cause of this is often a section specified in assembler |
b614a697d kbuild, modpost: ... |
794 |
* without "ax" / "aw". |
e241a6303 kbuild: warn abou... |
795 |
*/ |
b614a697d kbuild, modpost: ... |
796 797 |
static void check_section(const char *modname, struct elf_info *elf, Elf_Shdr *sechdr) |
e241a6303 kbuild: warn abou... |
798 |
{ |
b614a697d kbuild, modpost: ... |
799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 |
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... |
814 |
} |
e241a6303 kbuild: warn abou... |
815 |
} |
eb8f68904 Use separate sect... |
816 |
#define ALL_INIT_DATA_SECTIONS \ |
fd6c3a8dc initconst adjustm... |
817 818 |
".init.setup$", ".init.rodata$", \ ".devinit.rodata$", ".cpuinit.rodata$", ".meminit.rodata$" \ |
eb8f68904 Use separate sect... |
819 820 821 |
".init.data$", ".devinit.data$", ".cpuinit.data$", ".meminit.data$" #define ALL_EXIT_DATA_SECTIONS \ ".exit.data$", ".devexit.data$", ".cpuexit.data$", ".memexit.data$" |
10668220a kbuild: introduce... |
822 |
|
eb8f68904 Use separate sect... |
823 824 825 826 |
#define ALL_INIT_TEXT_SECTIONS \ ".init.text$", ".devinit.text$", ".cpuinit.text$", ".meminit.text$" #define ALL_EXIT_TEXT_SECTIONS \ ".exit.text$", ".devexit.text$", ".cpuexit.text$", ".memexit.text$" |
10668220a kbuild: introduce... |
827 |
|
4a31a229f modpost: define A... |
828 829 830 831 832 833 834 |
#define ALL_XXXINIT_SECTIONS DEV_INIT_SECTIONS, CPU_INIT_SECTIONS, \ MEM_INIT_SECTIONS #define ALL_XXXEXIT_SECTIONS DEV_EXIT_SECTIONS, CPU_EXIT_SECTIONS, \ MEM_EXIT_SECTIONS #define ALL_INIT_SECTIONS INIT_SECTIONS, ALL_XXXINIT_SECTIONS #define ALL_EXIT_SECTIONS EXIT_SECTIONS, ALL_XXXEXIT_SECTIONS |
10668220a kbuild: introduce... |
835 |
|
6c5bd235b kbuild: check sec... |
836 |
#define DATA_SECTIONS ".data$", ".data.rel$" |
10668220a kbuild: introduce... |
837 |
#define TEXT_SECTIONS ".text$" |
fd6c3a8dc initconst adjustm... |
838 839 840 841 |
#define INIT_SECTIONS ".init.*" #define DEV_INIT_SECTIONS ".devinit.*" #define CPU_INIT_SECTIONS ".cpuinit.*" #define MEM_INIT_SECTIONS ".meminit.*" |
eb8f68904 Use separate sect... |
842 |
|
fd6c3a8dc initconst adjustm... |
843 844 845 846 |
#define EXIT_SECTIONS ".exit.*" #define DEV_EXIT_SECTIONS ".devexit.*" #define CPU_EXIT_SECTIONS ".cpuexit.*" #define MEM_EXIT_SECTIONS ".memexit.*" |
eb8f68904 Use separate sect... |
847 |
|
6c5bd235b kbuild: check sec... |
848 |
/* init data sections */ |
eb8f68904 Use separate sect... |
849 |
static const char *init_data_sections[] = { ALL_INIT_DATA_SECTIONS, NULL }; |
6c5bd235b kbuild: check sec... |
850 851 |
/* all init sections */ |
eb8f68904 Use separate sect... |
852 |
static const char *init_sections[] = { ALL_INIT_SECTIONS, NULL }; |
6c5bd235b kbuild: check sec... |
853 854 855 |
/* All init and exit sections (code + data) */ static const char *init_exit_sections[] = |
eb8f68904 Use separate sect... |
856 |
{ALL_INIT_SECTIONS, ALL_EXIT_SECTIONS, NULL }; |
6c5bd235b kbuild: check sec... |
857 858 859 |
/* data section */ static const char *data_sections[] = { DATA_SECTIONS, NULL }; |
6c5bd235b kbuild: check sec... |
860 861 |
/* symbols in .data that may refer to init/exit sections */ |
af92a82d0 modpost: make sym... |
862 863 864 865 866 867 868 869 870 |
#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... |
871 872 873 874 |
static const char *head_sections[] = { ".head.text*", NULL }; static const char *linker_symbols[] = { "__init_begin", "_sinittext", "_einittext", NULL }; |
588ccd732 kbuild: add verbo... |
875 |
enum mismatch { |
bbd3f4fb8 modpost: give mos... |
876 877 878 879 880 881 882 883 |
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... |
884 885 |
EXPORT_TO_INIT_EXIT, }; |
10668220a kbuild: introduce... |
886 887 888 |
struct sectioncheck { const char *fromsec[20]; const char *tosec[20]; |
588ccd732 kbuild: add verbo... |
889 |
enum mismatch mismatch; |
af92a82d0 modpost: make sym... |
890 |
const char *symbol_white_list[20]; |
10668220a kbuild: introduce... |
891 892 893 894 895 896 897 |
}; const struct sectioncheck sectioncheck[] = { /* Do not reference init/exit code/data from * normal code and data */ { |
588ccd732 kbuild: add verbo... |
898 899 |
.fromsec = { TEXT_SECTIONS, NULL }, .tosec = { ALL_INIT_SECTIONS, NULL }, |
bbd3f4fb8 modpost: give mos... |
900 |
.mismatch = TEXT_TO_ANY_INIT, |
af92a82d0 modpost: make sym... |
901 |
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, |
588ccd732 kbuild: add verbo... |
902 903 904 |
}, { .fromsec = { DATA_SECTIONS, NULL }, |
0db252452 modpost: don't al... |
905 |
.tosec = { ALL_XXXINIT_SECTIONS, NULL }, |
bbd3f4fb8 modpost: give mos... |
906 |
.mismatch = DATA_TO_ANY_INIT, |
af92a82d0 modpost: make sym... |
907 |
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, |
588ccd732 kbuild: add verbo... |
908 909 |
}, { |
0db252452 modpost: don't al... |
910 911 912 913 914 915 916 917 918 |
.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... |
919 920 |
.fromsec = { TEXT_SECTIONS, NULL }, .tosec = { ALL_EXIT_SECTIONS, NULL }, |
bbd3f4fb8 modpost: give mos... |
921 |
.mismatch = TEXT_TO_ANY_EXIT, |
af92a82d0 modpost: make sym... |
922 |
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, |
588ccd732 kbuild: add verbo... |
923 924 925 926 |
}, { .fromsec = { DATA_SECTIONS, NULL }, .tosec = { ALL_EXIT_SECTIONS, NULL }, |
bbd3f4fb8 modpost: give mos... |
927 |
.mismatch = DATA_TO_ANY_EXIT, |
af92a82d0 modpost: make sym... |
928 |
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, |
eb8f68904 Use separate sect... |
929 930 931 |
}, /* Do not reference init code/data from devinit/cpuinit/meminit code/data */ { |
4a31a229f modpost: define A... |
932 |
.fromsec = { ALL_XXXINIT_SECTIONS, NULL }, |
588ccd732 kbuild: add verbo... |
933 |
.tosec = { INIT_SECTIONS, NULL }, |
bbd3f4fb8 modpost: give mos... |
934 |
.mismatch = XXXINIT_TO_SOME_INIT, |
af92a82d0 modpost: make sym... |
935 |
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, |
eb8f68904 Use separate sect... |
936 |
}, |
fd6c3a8dc initconst adjustm... |
937 938 939 940 |
/* Do not reference cpuinit code/data from meminit code/data */ { .fromsec = { MEM_INIT_SECTIONS, NULL }, .tosec = { CPU_INIT_SECTIONS, NULL }, |
bbd3f4fb8 modpost: give mos... |
941 |
.mismatch = XXXINIT_TO_SOME_INIT, |
af92a82d0 modpost: make sym... |
942 |
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, |
fd6c3a8dc initconst adjustm... |
943 944 945 946 947 |
}, /* Do not reference meminit code/data from cpuinit code/data */ { .fromsec = { CPU_INIT_SECTIONS, NULL }, .tosec = { MEM_INIT_SECTIONS, NULL }, |
bbd3f4fb8 modpost: give mos... |
948 |
.mismatch = XXXINIT_TO_SOME_INIT, |
af92a82d0 modpost: make sym... |
949 |
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, |
fd6c3a8dc initconst adjustm... |
950 |
}, |
eb8f68904 Use separate sect... |
951 952 |
/* Do not reference exit code/data from devexit/cpuexit/memexit code/data */ { |
4a31a229f modpost: define A... |
953 |
.fromsec = { ALL_XXXEXIT_SECTIONS, NULL }, |
588ccd732 kbuild: add verbo... |
954 |
.tosec = { EXIT_SECTIONS, NULL }, |
bbd3f4fb8 modpost: give mos... |
955 |
.mismatch = XXXEXIT_TO_SOME_EXIT, |
af92a82d0 modpost: make sym... |
956 |
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, |
10668220a kbuild: introduce... |
957 |
}, |
fd6c3a8dc initconst adjustm... |
958 959 960 961 |
/* Do not reference cpuexit code/data from memexit code/data */ { .fromsec = { MEM_EXIT_SECTIONS, NULL }, .tosec = { CPU_EXIT_SECTIONS, NULL }, |
bbd3f4fb8 modpost: give mos... |
962 |
.mismatch = XXXEXIT_TO_SOME_EXIT, |
af92a82d0 modpost: make sym... |
963 |
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, |
fd6c3a8dc initconst adjustm... |
964 965 966 967 968 |
}, /* Do not reference memexit code/data from cpuexit code/data */ { .fromsec = { CPU_EXIT_SECTIONS, NULL }, .tosec = { MEM_EXIT_SECTIONS, NULL }, |
bbd3f4fb8 modpost: give mos... |
969 |
.mismatch = XXXEXIT_TO_SOME_EXIT, |
af92a82d0 modpost: make sym... |
970 |
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, |
fd6c3a8dc initconst adjustm... |
971 |
}, |
10668220a kbuild: introduce... |
972 973 |
/* Do not use exit code/data from init code */ { |
eb8f68904 Use separate sect... |
974 975 |
.fromsec = { ALL_INIT_SECTIONS, NULL }, .tosec = { ALL_EXIT_SECTIONS, NULL }, |
bbd3f4fb8 modpost: give mos... |
976 |
.mismatch = ANY_INIT_TO_ANY_EXIT, |
af92a82d0 modpost: make sym... |
977 |
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, |
10668220a kbuild: introduce... |
978 979 980 |
}, /* Do not use init code/data from exit code */ { |
eb8f68904 Use separate sect... |
981 |
.fromsec = { ALL_EXIT_SECTIONS, NULL }, |
588ccd732 kbuild: add verbo... |
982 |
.tosec = { ALL_INIT_SECTIONS, NULL }, |
bbd3f4fb8 modpost: give mos... |
983 |
.mismatch = ANY_EXIT_TO_ANY_INIT, |
af92a82d0 modpost: make sym... |
984 |
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, |
10668220a kbuild: introduce... |
985 986 987 988 |
}, /* Do not export init/exit functions or data */ { .fromsec = { "__ksymtab*", NULL }, |
fa95eb1f1 kbuild: do not wa... |
989 |
.tosec = { INIT_SECTIONS, EXIT_SECTIONS, NULL }, |
af92a82d0 modpost: make sym... |
990 991 |
.mismatch = EXPORT_TO_INIT_EXIT, .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, |
10668220a kbuild: introduce... |
992 993 |
} }; |
0d2a636ee modpost: pass aro... |
994 995 |
static const struct sectioncheck *section_mismatch( const char *fromsec, const char *tosec) |
10668220a kbuild: introduce... |
996 997 998 999 1000 1001 1002 1003 |
{ 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... |
1004 |
return check; |
10668220a kbuild: introduce... |
1005 1006 |
check++; } |
0d2a636ee modpost: pass aro... |
1007 |
return NULL; |
10668220a kbuild: introduce... |
1008 |
} |
4c8fbca58 kbuild: whitelist... |
1009 1010 |
/** * Whitelist to allow certain references to pass with no warning. |
0e0d314e6 kbuild: introduce... |
1011 |
* |
4c8fbca58 kbuild: whitelist... |
1012 1013 1014 1015 1016 1017 1018 |
* 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... |
1019 |
* fromsec = .data* |
4c8fbca58 kbuild: whitelist... |
1020 |
* atsym =__param* |
62070fa42 kbuild: kill trai... |
1021 |
* |
6a841528d param: silence .i... |
1022 1023 1024 1025 1026 1027 1028 |
* 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... |
1029 |
* Pattern 2: |
72ee59b57 kbuild modpost - ... |
1030 |
* Many drivers utilise a *driver container with references to |
4c8fbca58 kbuild: whitelist... |
1031 |
* add, remove, probe functions etc. |
b75dcabd6 modpost: members ... |
1032 |
* These functions may often be marked __devinit and we do not want to |
4c8fbca58 kbuild: whitelist... |
1033 1034 |
* warn here. * the pattern is identified by: |
83cda2bb3 kbuild: be more f... |
1035 1036 |
* tosec = init or exit section * fromsec = data section |
df578e7d8 kbuild: clean up ... |
1037 1038 |
* atsym = *driver, *_template, *_sht, *_ops, *_probe, * *probe_one, *_console, *_timer |
ee6a8545a [PATCH] x86-64: M... |
1039 1040 |
* * Pattern 3: |
c993971f4 kbuild: fix comme... |
1041 |
* Whitelist all references from .head.text to any init section |
9bf8cb9b7 kbuild: fix warni... |
1042 |
* |
1d8af559f kbuild: consolida... |
1043 |
* Pattern 4: |
ee6a8545a [PATCH] x86-64: M... |
1044 1045 1046 1047 1048 1049 1050 |
* 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... |
1051 |
* |
4c8fbca58 kbuild: whitelist... |
1052 |
**/ |
af92a82d0 modpost: make sym... |
1053 1054 |
static int secref_whitelist(const struct sectioncheck *mismatch, const char *fromsec, const char *fromsym, |
58fb0d4f2 kbuild: simplifie... |
1055 |
const char *tosec, const char *tosym) |
4c8fbca58 kbuild: whitelist... |
1056 |
{ |
4c8fbca58 kbuild: whitelist... |
1057 |
/* Check for pattern 1 */ |
6c5bd235b kbuild: check sec... |
1058 1059 |
if (match(tosec, init_data_sections) && match(fromsec, data_sections) && |
58fb0d4f2 kbuild: simplifie... |
1060 1061 |
(strncmp(fromsym, "__param", strlen("__param")) == 0)) return 0; |
4c8fbca58 kbuild: whitelist... |
1062 |
|
6a841528d param: silence .i... |
1063 1064 1065 1066 1067 |
/* 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... |
1068 |
/* Check for pattern 2 */ |
6c5bd235b kbuild: check sec... |
1069 1070 |
if (match(tosec, init_exit_sections) && match(fromsec, data_sections) && |
af92a82d0 modpost: make sym... |
1071 |
match(fromsym, mismatch->symbol_white_list)) |
58fb0d4f2 kbuild: simplifie... |
1072 |
return 0; |
4c8fbca58 kbuild: whitelist... |
1073 |
|
9bf8cb9b7 kbuild: fix warni... |
1074 |
/* Check for pattern 3 */ |
6c5bd235b kbuild: check sec... |
1075 1076 |
if (match(fromsec, head_sections) && match(tosec, init_sections)) |
58fb0d4f2 kbuild: simplifie... |
1077 |
return 0; |
9bf8cb9b7 kbuild: fix warni... |
1078 |
|
1d8af559f kbuild: consolida... |
1079 |
/* Check for pattern 4 */ |
58fb0d4f2 kbuild: simplifie... |
1080 1081 |
if (match(tosym, linker_symbols)) return 0; |
9bf8cb9b7 kbuild: fix warni... |
1082 |
|
58fb0d4f2 kbuild: simplifie... |
1083 |
return 1; |
4c8fbca58 kbuild: whitelist... |
1084 1085 1086 |
} /** |
93684d3b8 kbuild: include s... |
1087 1088 1089 1090 1091 1092 |
* 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... |
1093 |
static Elf_Sym *find_elf_symbol(struct elf_info *elf, Elf64_Sword addr, |
93684d3b8 kbuild: include s... |
1094 1095 1096 |
Elf_Sym *relsym) { Elf_Sym *sym; |
9ad21c3f3 kbuild: try harde... |
1097 1098 1099 |
Elf_Sym *near = NULL; Elf64_Sword distance = 20; Elf64_Sword d; |
1ce53adf1 modpost: support ... |
1100 |
unsigned int relsym_secindex; |
93684d3b8 kbuild: include s... |
1101 1102 1103 |
if (relsym->st_name != 0) return relsym; |
1ce53adf1 modpost: support ... |
1104 1105 |
relsym_secindex = get_secindex(elf, relsym); |
93684d3b8 kbuild: include s... |
1106 |
for (sym = elf->symtab_start; sym < elf->symtab_stop; sym++) { |
1ce53adf1 modpost: support ... |
1107 |
if (get_secindex(elf, sym) != relsym_secindex) |
93684d3b8 kbuild: include s... |
1108 |
continue; |
ae4ac1232 kbuild: make bett... |
1109 1110 |
if (ELF_ST_TYPE(sym->st_info) == STT_SECTION) continue; |
93684d3b8 kbuild: include s... |
1111 1112 |
if (sym->st_value == addr) return sym; |
9ad21c3f3 kbuild: try harde... |
1113 1114 1115 1116 1117 1118 1119 1120 |
/* 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... |
1121 |
} |
9ad21c3f3 kbuild: try harde... |
1122 1123 1124 1125 1126 |
/* We need a close match */ if (distance < 20) return near; else return NULL; |
93684d3b8 kbuild: include s... |
1127 |
} |
da68d61f8 [PATCH] remove mo... |
1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 |
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... |
1151 |
/* |
43c74d179 kbuild: in the se... |
1152 1153 1154 1155 |
* 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... |
1156 |
**/ |
157c23c80 kbuild: use simpl... |
1157 1158 |
static Elf_Sym *find_elf_symbol2(struct elf_info *elf, Elf_Addr addr, const char *sec) |
b39927cf4 kbuild: check for... |
1159 1160 |
{ Elf_Sym *sym; |
157c23c80 kbuild: use simpl... |
1161 |
Elf_Sym *near = NULL; |
157c23c80 kbuild: use simpl... |
1162 |
Elf_Addr distance = ~0; |
62070fa42 kbuild: kill trai... |
1163 |
|
b39927cf4 kbuild: check for... |
1164 1165 |
for (sym = elf->symtab_start; sym < elf->symtab_stop; sym++) { const char *symsec; |
1ce53adf1 modpost: support ... |
1166 |
if (is_shndx_special(sym->st_shndx)) |
b39927cf4 kbuild: check for... |
1167 |
continue; |
1ce53adf1 modpost: support ... |
1168 |
symsec = sec_name(elf, get_secindex(elf, sym)); |
b39927cf4 kbuild: check for... |
1169 1170 |
if (strcmp(symsec, sec) != 0) continue; |
da68d61f8 [PATCH] remove mo... |
1171 1172 |
if (!is_valid_name(elf, sym)) continue; |
b39927cf4 kbuild: check for... |
1173 |
if (sym->st_value <= addr) { |
157c23c80 kbuild: use simpl... |
1174 1175 1176 1177 1178 |
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... |
1179 |
} |
b39927cf4 kbuild: check for... |
1180 1181 |
} } |
157c23c80 kbuild: use simpl... |
1182 |
return near; |
b39927cf4 kbuild: check for... |
1183 |
} |
58fb0d4f2 kbuild: simplifie... |
1184 |
/* |
588ccd732 kbuild: add verbo... |
1185 1186 1187 1188 1189 |
* Convert a section name to the function/data attribute * .init.text => __init * .cpuinit.data => __cpudata * .memexitconst => __memconst * etc. |
cbcf14a94 scripts/mod/modpo... |
1190 1191 1192 |
* * The memory of returned value has been allocated on a heap. The user of this * method should free it after usage. |
588ccd732 kbuild: add verbo... |
1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 |
*/ 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, " "); |
cbcf14a94 scripts/mod/modpo... |
1215 |
return r; |
588ccd732 kbuild: add verbo... |
1216 |
} else { |
5003bab82 fix "scripts/mod/... |
1217 |
return strdup(""); |
588ccd732 kbuild: add verbo... |
1218 1219 1220 1221 1222 1223 1224 1225 |
} } static int is_function(Elf_Sym *sym) { if (sym) return ELF_ST_TYPE(sym->st_info) == STT_FUNC; else |
f666751a0 kbuild/modpost: i... |
1226 |
return -1; |
588ccd732 kbuild: add verbo... |
1227 |
} |
00759c0ea modpost: fix trai... |
1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 |
static void print_section_list(const char * const list[20]) { const char *const *s = list; while (*s) { fprintf(stderr, "%s", *s); s++; if (*s) fprintf(stderr, ", "); } fprintf(stderr, " "); } |
588ccd732 kbuild: add verbo... |
1241 |
/* |
b39927cf4 kbuild: check for... |
1242 1243 |
* Print a warning about a section mismatch. * Try to find symbols near it so user can find it. |
4c8fbca58 kbuild: whitelist... |
1244 |
* Check whitelist before warning - it may be a false positive. |
58fb0d4f2 kbuild: simplifie... |
1245 |
*/ |
0d2a636ee modpost: pass aro... |
1246 1247 |
static void report_sec_mismatch(const char *modname, const struct sectioncheck *mismatch, |
58fb0d4f2 kbuild: simplifie... |
1248 1249 1250 |
const char *fromsec, unsigned long long fromaddr, const char *fromsym, |
588ccd732 kbuild: add verbo... |
1251 1252 1253 1254 1255 1256 |
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... |
1257 1258 |
char *prl_from; char *prl_to; |
f666751a0 kbuild/modpost: i... |
1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 |
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... |
1270 |
|
e5f95c8b7 kbuild: print onl... |
1271 1272 1273 |
sec_mismatch_count++; if (!sec_mismatch_verbose) return; |
7c0ac495e kbuild/modpost: U... |
1274 1275 1276 1277 1278 |
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... |
1279 |
|
0d2a636ee modpost: pass aro... |
1280 |
switch (mismatch->mismatch) { |
bbd3f4fb8 modpost: give mos... |
1281 |
case TEXT_TO_ANY_INIT: |
37ed19d5c scripts/mod/modpo... |
1282 1283 |
prl_from = sec2annotation(fromsec); prl_to = sec2annotation(tosec); |
588ccd732 kbuild: add verbo... |
1284 |
fprintf(stderr, |
f666751a0 kbuild/modpost: i... |
1285 1286 |
"The function %s%s() references " |
588ccd732 kbuild: add verbo... |
1287 1288 1289 1290 1291 1292 |
"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... |
1293 1294 1295 1296 1297 |
prl_from, fromsym, to, prl_to, tosym, to_p, fromsym, prl_to, tosym); free(prl_from); free(prl_to); |
588ccd732 kbuild: add verbo... |
1298 |
break; |
bbd3f4fb8 modpost: give mos... |
1299 |
case DATA_TO_ANY_INIT: { |
37ed19d5c scripts/mod/modpo... |
1300 |
prl_to = sec2annotation(tosec); |
588ccd732 kbuild: add verbo... |
1301 1302 1303 1304 1305 1306 1307 |
fprintf(stderr, "The variable %s references " "the %s %s%s%s " "If the reference is valid then annotate the " |
8b8b76c04 kbuild: add hint ... |
1308 |
"variable with __init* or __refdata (see linux/init.h) " |
588ccd732 kbuild: add verbo... |
1309 1310 |
"or name the variable: ", |
37ed19d5c scripts/mod/modpo... |
1311 |
fromsym, to, prl_to, tosym, to_p); |
00759c0ea modpost: fix trai... |
1312 |
print_section_list(mismatch->symbol_white_list); |
37ed19d5c scripts/mod/modpo... |
1313 |
free(prl_to); |
588ccd732 kbuild: add verbo... |
1314 |
break; |
58fb0d4f2 kbuild: simplifie... |
1315 |
} |
bbd3f4fb8 modpost: give mos... |
1316 |
case TEXT_TO_ANY_EXIT: |
37ed19d5c scripts/mod/modpo... |
1317 |
prl_to = sec2annotation(tosec); |
588ccd732 kbuild: add verbo... |
1318 1319 1320 1321 1322 1323 1324 |
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... |
1325 1326 |
fromsym, to, to, tosym, to_p, prl_to, tosym); free(prl_to); |
588ccd732 kbuild: add verbo... |
1327 |
break; |
bbd3f4fb8 modpost: give mos... |
1328 |
case DATA_TO_ANY_EXIT: { |
37ed19d5c scripts/mod/modpo... |
1329 |
prl_to = sec2annotation(tosec); |
588ccd732 kbuild: add verbo... |
1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 |
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... |
1340 |
fromsym, to, prl_to, tosym, to_p); |
00759c0ea modpost: fix trai... |
1341 |
print_section_list(mismatch->symbol_white_list); |
37ed19d5c scripts/mod/modpo... |
1342 |
free(prl_to); |
588ccd732 kbuild: add verbo... |
1343 1344 |
break; } |
bbd3f4fb8 modpost: give mos... |
1345 1346 |
case XXXINIT_TO_SOME_INIT: case XXXEXIT_TO_SOME_EXIT: |
37ed19d5c scripts/mod/modpo... |
1347 1348 |
prl_from = sec2annotation(fromsec); prl_to = sec2annotation(tosec); |
588ccd732 kbuild: add verbo... |
1349 1350 1351 1352 1353 1354 1355 1356 1357 |
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... |
1358 1359 |
from, prl_from, fromsym, from_p, to, prl_to, tosym, to_p, |
b1d2675a6 kbuild: fix rever... |
1360 |
tosym, fromsym, tosym); |
37ed19d5c scripts/mod/modpo... |
1361 1362 |
free(prl_from); free(prl_to); |
588ccd732 kbuild: add verbo... |
1363 |
break; |
bbd3f4fb8 modpost: give mos... |
1364 |
case ANY_INIT_TO_ANY_EXIT: |
37ed19d5c scripts/mod/modpo... |
1365 1366 |
prl_from = sec2annotation(fromsec); prl_to = sec2annotation(tosec); |
588ccd732 kbuild: add verbo... |
1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 |
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... |
1381 1382 |
from, prl_from, fromsym, from_p, to, prl_to, tosym, to_p, |
5003bab82 fix "scripts/mod/... |
1383 |
prl_to, tosym, to_p); |
37ed19d5c scripts/mod/modpo... |
1384 1385 |
free(prl_from); free(prl_to); |
588ccd732 kbuild: add verbo... |
1386 |
break; |
bbd3f4fb8 modpost: give mos... |
1387 |
case ANY_EXIT_TO_ANY_INIT: |
37ed19d5c scripts/mod/modpo... |
1388 1389 |
prl_from = sec2annotation(fromsec); prl_to = sec2annotation(tosec); |
588ccd732 kbuild: add verbo... |
1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 |
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... |
1404 1405 1406 1407 1408 |
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... |
1409 1410 |
break; case EXPORT_TO_INIT_EXIT: |
37ed19d5c scripts/mod/modpo... |
1411 |
prl_to = sec2annotation(tosec); |
588ccd732 kbuild: add verbo... |
1412 1413 1414 1415 1416 1417 |
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... |
1418 1419 |
tosym, prl_to, prl_to, tosym); free(prl_to); |
588ccd732 kbuild: add verbo... |
1420 1421 1422 1423 |
break; } fprintf(stderr, " "); |
58fb0d4f2 kbuild: simplifie... |
1424 1425 1426 1427 1428 1429 |
} 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... |
1430 |
const struct sectioncheck *mismatch; |
58fb0d4f2 kbuild: simplifie... |
1431 |
|
1ce53adf1 modpost: support ... |
1432 |
tosec = sec_name(elf, get_secindex(elf, sym)); |
588ccd732 kbuild: add verbo... |
1433 |
mismatch = section_mismatch(fromsec, tosec); |
0d2a636ee modpost: pass aro... |
1434 |
if (mismatch) { |
588ccd732 kbuild: add verbo... |
1435 1436 |
Elf_Sym *to; Elf_Sym *from; |
58fb0d4f2 kbuild: simplifie... |
1437 |
const char *tosym; |
588ccd732 kbuild: add verbo... |
1438 |
const char *fromsym; |
58fb0d4f2 kbuild: simplifie... |
1439 |
|
588ccd732 kbuild: add verbo... |
1440 1441 1442 1443 |
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... |
1444 1445 |
/* check whitelist - we may ignore it */ |
af92a82d0 modpost: make sym... |
1446 1447 |
if (secref_whitelist(mismatch, fromsec, fromsym, tosec, tosym)) { |
588ccd732 kbuild: add verbo... |
1448 1449 1450 1451 |
report_sec_mismatch(modname, mismatch, fromsec, r->r_offset, fromsym, is_function(from), tosec, tosym, is_function(to)); |
58fb0d4f2 kbuild: simplifie... |
1452 |
} |
b39927cf4 kbuild: check for... |
1453 1454 |
} } |
ae4ac1232 kbuild: make bett... |
1455 |
static unsigned int *reloc_location(struct elf_info *elf, |
5b24c0715 kbuild: code refa... |
1456 |
Elf_Shdr *sechdr, Elf_Rela *r) |
ae4ac1232 kbuild: make bett... |
1457 1458 |
{ Elf_Shdr *sechdrs = elf->sechdrs; |
6845756b2 modpost: Update 6... |
1459 |
int section = sechdr->sh_info; |
ae4ac1232 kbuild: make bett... |
1460 1461 |
return (void *)elf->hdr + sechdrs[section].sh_offset + |
731ece41f modpost: Fix addr... |
1462 |
r->r_offset; |
ae4ac1232 kbuild: make bett... |
1463 |
} |
5b24c0715 kbuild: code refa... |
1464 |
static int addend_386_rel(struct elf_info *elf, Elf_Shdr *sechdr, Elf_Rela *r) |
ae4ac1232 kbuild: make bett... |
1465 1466 |
{ unsigned int r_typ = ELF_R_TYPE(r->r_info); |
5b24c0715 kbuild: code refa... |
1467 |
unsigned int *location = reloc_location(elf, sechdr, r); |
ae4ac1232 kbuild: make bett... |
1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 |
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... |
1482 |
static int addend_arm_rel(struct elf_info *elf, Elf_Shdr *sechdr, Elf_Rela *r) |
56a974fa2 kbuild: make bett... |
1483 1484 1485 1486 1487 1488 |
{ 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 ... |
1489 1490 |
r->r_addend = (int)(long) (elf->symtab_start + ELF_R_SYM(r->r_info)); |
56a974fa2 kbuild: make bett... |
1491 1492 1493 |
break; case R_ARM_PC24: /* From ARM ABI: ((S + A) | T) - P */ |
df578e7d8 kbuild: clean up ... |
1494 |
r->r_addend = (int)(long)(elf->hdr + |
5b24c0715 kbuild: code refa... |
1495 1496 |
sechdr->sh_offset + (r->r_offset - sechdr->sh_addr)); |
56a974fa2 kbuild: make bett... |
1497 1498 1499 1500 1501 1502 |
break; default: return 1; } return 0; } |
5b24c0715 kbuild: code refa... |
1503 |
static int addend_mips_rel(struct elf_info *elf, Elf_Shdr *sechdr, Elf_Rela *r) |
ae4ac1232 kbuild: make bett... |
1504 1505 |
{ unsigned int r_typ = ELF_R_TYPE(r->r_info); |
5b24c0715 kbuild: code refa... |
1506 |
unsigned int *location = reloc_location(elf, sechdr, r); |
ae4ac1232 kbuild: make bett... |
1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 |
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... |
1525 |
static void section_rela(const char *modname, struct elf_info *elf, |
10668220a kbuild: introduce... |
1526 |
Elf_Shdr *sechdr) |
5b24c0715 kbuild: code refa... |
1527 1528 1529 1530 1531 1532 |
{ Elf_Sym *sym; Elf_Rela *rela; Elf_Rela r; unsigned int r_sym; const char *fromsec; |
5b24c0715 kbuild: code refa... |
1533 |
|
ff13f9269 kbuild: introduce... |
1534 |
Elf_Rela *start = (void *)elf->hdr + sechdr->sh_offset; |
5b24c0715 kbuild: code refa... |
1535 |
Elf_Rela *stop = (void *)start + sechdr->sh_size; |
ff13f9269 kbuild: introduce... |
1536 |
fromsec = sech_name(elf, sechdr); |
5b24c0715 kbuild: code refa... |
1537 1538 |
fromsec += strlen(".rela"); /* if from section (name) is know good then skip it */ |
b614a697d kbuild, modpost: ... |
1539 |
if (match(fromsec, section_white_list)) |
5b24c0715 kbuild: code refa... |
1540 |
return; |
e241a6303 kbuild: warn abou... |
1541 |
|
5b24c0715 kbuild: code refa... |
1542 1543 1544 |
for (rela = start; rela < stop; rela++) { r.r_offset = TO_NATIVE(rela->r_offset); #if KERNEL_ELFCLASS == ELFCLASS64 |
ff13f9269 kbuild: introduce... |
1545 |
if (elf->hdr->e_machine == EM_MIPS) { |
5b24c0715 kbuild: code refa... |
1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 |
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 ... |
1562 |
if (is_shndx_special(sym->st_shndx)) |
5b24c0715 kbuild: code refa... |
1563 |
continue; |
58fb0d4f2 kbuild: simplifie... |
1564 |
check_section_mismatch(modname, elf, &r, sym, fromsec); |
5b24c0715 kbuild: code refa... |
1565 1566 1567 1568 |
} } static void section_rel(const char *modname, struct elf_info *elf, |
10668220a kbuild: introduce... |
1569 |
Elf_Shdr *sechdr) |
5b24c0715 kbuild: code refa... |
1570 1571 1572 1573 1574 1575 |
{ Elf_Sym *sym; Elf_Rel *rel; Elf_Rela r; unsigned int r_sym; const char *fromsec; |
5b24c0715 kbuild: code refa... |
1576 |
|
ff13f9269 kbuild: introduce... |
1577 |
Elf_Rel *start = (void *)elf->hdr + sechdr->sh_offset; |
5b24c0715 kbuild: code refa... |
1578 |
Elf_Rel *stop = (void *)start + sechdr->sh_size; |
ff13f9269 kbuild: introduce... |
1579 |
fromsec = sech_name(elf, sechdr); |
5b24c0715 kbuild: code refa... |
1580 1581 |
fromsec += strlen(".rel"); /* if from section (name) is know good then skip it */ |
b614a697d kbuild, modpost: ... |
1582 |
if (match(fromsec, section_white_list)) |
5b24c0715 kbuild: code refa... |
1583 1584 1585 1586 1587 |
return; for (rel = start; rel < stop; rel++) { r.r_offset = TO_NATIVE(rel->r_offset); #if KERNEL_ELFCLASS == ELFCLASS64 |
ff13f9269 kbuild: introduce... |
1588 |
if (elf->hdr->e_machine == EM_MIPS) { |
5b24c0715 kbuild: code refa... |
1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 |
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... |
1603 |
switch (elf->hdr->e_machine) { |
5b24c0715 kbuild: code refa... |
1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 |
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 ... |
1619 |
if (is_shndx_special(sym->st_shndx)) |
5b24c0715 kbuild: code refa... |
1620 |
continue; |
58fb0d4f2 kbuild: simplifie... |
1621 |
check_section_mismatch(modname, elf, &r, sym, fromsec); |
5b24c0715 kbuild: code refa... |
1622 1623 |
} } |
b39927cf4 kbuild: check for... |
1624 1625 1626 1627 |
/** * 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 |
b595076a1 tree-wide: fix co... |
1628 |
* marked __initdata will be discarded when the module has been initialized. |
b39927cf4 kbuild: check for... |
1629 1630 |
* 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... |
1631 |
* only when a module is unloaded which never happens for built-in modules. |
b39927cf4 kbuild: check for... |
1632 1633 1634 1635 1636 |
* 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... |
1637 |
struct elf_info *elf) |
b39927cf4 kbuild: check for... |
1638 1639 |
{ int i; |
b39927cf4 kbuild: check for... |
1640 |
Elf_Shdr *sechdrs = elf->sechdrs; |
62070fa42 kbuild: kill trai... |
1641 |
|
b39927cf4 kbuild: check for... |
1642 |
/* Walk through all sections */ |
1ce53adf1 modpost: support ... |
1643 |
for (i = 0; i < elf->num_sections; i++) { |
b614a697d kbuild, modpost: ... |
1644 |
check_section(modname, elf, &elf->sechdrs[i]); |
b39927cf4 kbuild: check for... |
1645 |
/* We want to process only relocation sections and not .init */ |
5b24c0715 kbuild: code refa... |
1646 |
if (sechdrs[i].sh_type == SHT_RELA) |
10668220a kbuild: introduce... |
1647 |
section_rela(modname, elf, &elf->sechdrs[i]); |
5b24c0715 kbuild: code refa... |
1648 |
else if (sechdrs[i].sh_type == SHT_REL) |
10668220a kbuild: introduce... |
1649 |
section_rel(modname, elf, &elf->sechdrs[i]); |
b39927cf4 kbuild: check for... |
1650 1651 |
} } |
5c3ead8c7 kbuild: apply Cod... |
1652 |
static void read_symbols(char *modname) |
1da177e4c Linux-2.6.12-rc2 |
1653 1654 1655 |
{ const char *symname; char *version; |
b817f6fef kbuild: check lic... |
1656 |
char *license; |
1da177e4c Linux-2.6.12-rc2 |
1657 1658 1659 |
struct module *mod; struct elf_info info = { }; Elf_Sym *sym; |
85bd2fddd kbuild: fix secti... |
1660 1661 |
if (!parse_elf(&info, modname)) return; |
1da177e4c Linux-2.6.12-rc2 |
1662 1663 1664 1665 1666 1667 |
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 |
1668 |
have_vmlinux = 1; |
1da177e4c Linux-2.6.12-rc2 |
1669 1670 |
mod->skip = 1; } |
b817f6fef kbuild: check lic... |
1671 |
license = get_modinfo(info.modinfo, info.modinfo_len, "license"); |
2fa365682 kbuild: soften MO... |
1672 1673 1674 1675 1676 1677 |
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... |
1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 |
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 |
1688 1689 1690 1691 1692 1693 |
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... |
1694 |
if (!is_vmlinux(modname) || |
10668220a kbuild: introduce... |
1695 1696 |
(is_vmlinux(modname) && vmlinux_section_warnings)) check_sec_ref(mod, modname, &info); |
1da177e4c Linux-2.6.12-rc2 |
1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 |
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... |
1707 |
/* Our trick to get versioning for module struct etc. - it's |
1da177e4c Linux-2.6.12-rc2 |
1708 1709 1710 1711 |
* 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... |
1712 |
mod->unres = alloc_symbol("module_layout", 0, mod->unres); |
1da177e4c Linux-2.6.12-rc2 |
1713 1714 1715 1716 1717 1718 1719 |
} #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... |
1720 1721 |
void __attribute__((format(printf, 2, 3))) buf_printf(struct buffer *buf, const char *fmt, ...) |
1da177e4c Linux-2.6.12-rc2 |
1722 1723 1724 1725 |
{ char tmp[SZ]; int len; va_list ap; |
62070fa42 kbuild: kill trai... |
1726 |
|
1da177e4c Linux-2.6.12-rc2 |
1727 1728 |
va_start(ap, fmt); len = vsnprintf(tmp, SZ, fmt, ap); |
7670f023a [PATCH] kbuild: f... |
1729 |
buf_write(buf, tmp, len); |
1da177e4c Linux-2.6.12-rc2 |
1730 1731 |
va_end(ap); } |
5c3ead8c7 kbuild: apply Cod... |
1732 |
void buf_write(struct buffer *buf, const char *s, int len) |
1da177e4c Linux-2.6.12-rc2 |
1733 1734 |
{ if (buf->size - buf->pos < len) { |
7670f023a [PATCH] kbuild: f... |
1735 |
buf->size += len + SZ; |
1da177e4c Linux-2.6.12-rc2 |
1736 1737 1738 1739 1740 |
buf->p = realloc(buf->p, buf->size); } strncpy(buf->p + buf->pos, s, len); buf->pos += len; } |
c96fca213 kbuild: warn when... |
1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 |
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 ... |
1768 |
static void check_for_unused(enum export exp, const char *m, const char *s) |
c96fca213 kbuild: warn when... |
1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 |
{ 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... |
1786 1787 1788 1789 |
{ struct symbol *s, *exp; for (s = mod->unres; s; s = s->next) { |
6449bd621 kbuild: modpost b... |
1790 |
const char *basename; |
b817f6fef kbuild: check lic... |
1791 1792 1793 |
exp = find_symbol(s->name); if (!exp || exp->module == mod) continue; |
6449bd621 kbuild: modpost b... |
1794 |
basename = strrchr(mod->name, '/'); |
b817f6fef kbuild: check lic... |
1795 1796 |
if (basename) basename++; |
c96fca213 kbuild: warn when... |
1797 1798 1799 1800 1801 |
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 ... |
1802 |
} |
b817f6fef kbuild: check lic... |
1803 |
} |
5c3ead8c7 kbuild: apply Cod... |
1804 1805 1806 1807 |
/** * Header for the generated file **/ static void add_header(struct buffer *b, struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 |
{ 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 |
1821 1822 1823 1824 |
buf_printf(b, "struct module __this_module "); buf_printf(b, "__attribute__((section(\".gnu.linkonce.this_module\"))) = { "); |
f83b5e323 kbuild: set corre... |
1825 1826 |
buf_printf(b, " .name = KBUILD_MODNAME, "); |
1da177e4c Linux-2.6.12-rc2 |
1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 |
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... |
1837 1838 |
buf_printf(b, " .arch = MODULE_ARCH_INIT, "); |
1da177e4c Linux-2.6.12-rc2 |
1839 1840 1841 |
buf_printf(b, "}; "); } |
2449b8ba0 module,bug: Add T... |
1842 1843 1844 1845 1846 1847 1848 |
static void add_intree_flag(struct buffer *b, int is_intree) { if (is_intree) buf_printf(b, " MODULE_INFO(intree, \"Y\"); "); } |
5c7251384 Fix all -Wmissing... |
1849 |
static void add_staging_flag(struct buffer *b, const char *name) |
a9860bf05 Staging: add TAIN... |
1850 1851 1852 1853 1854 1855 1856 1857 |
{ 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... |
1858 1859 1860 |
/** * Record CRCs for unresolved symbols **/ |
c53ddacdc kbuild: fail kern... |
1861 |
static int add_versions(struct buffer *b, struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
1862 1863 |
{ struct symbol *s, *exp; |
c53ddacdc kbuild: fail kern... |
1864 |
int err = 0; |
1da177e4c Linux-2.6.12-rc2 |
1865 1866 1867 1868 |
for (s = mod->unres; s; s = s->next) { exp = find_symbol(s->name); if (!exp || exp->module == mod) { |
c53ddacdc kbuild: fail kern... |
1869 |
if (have_vmlinux && !s->weak) { |
2a1166594 kbuild: distingui... |
1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 |
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... |
1880 |
} |
1da177e4c Linux-2.6.12-rc2 |
1881 1882 1883 1884 1885 1886 1887 1888 |
continue; } s->module = exp->module; s->crc_valid = exp->crc_valid; s->crc = exp->crc; } if (!modversions) |
c53ddacdc kbuild: fail kern... |
1889 |
return err; |
1da177e4c Linux-2.6.12-rc2 |
1890 1891 1892 1893 1894 |
buf_printf(b, " "); buf_printf(b, "static const struct modversion_info ____versions[] "); |
3ff6eecca remove __attribut... |
1895 1896 |
buf_printf(b, "__used "); |
1da177e4c Linux-2.6.12-rc2 |
1897 1898 1899 1900 |
buf_printf(b, "__attribute__((section(\"__versions\"))) = { "); for (s = mod->unres; s; s = s->next) { |
df578e7d8 kbuild: clean up ... |
1901 |
if (!s->module) |
1da177e4c Linux-2.6.12-rc2 |
1902 |
continue; |
1da177e4c Linux-2.6.12-rc2 |
1903 |
if (!s->crc_valid) { |
cb80514d9 kbuild: use warn(... |
1904 1905 |
warn("\"%s\" [%s.ko] has no CRC! ", |
1da177e4c Linux-2.6.12-rc2 |
1906 1907 1908 1909 1910 1911 1912 1913 1914 |
s->name, mod->name); continue; } buf_printf(b, "\t{ %#8x, \"%s\" }, ", s->crc, s->name); } buf_printf(b, "}; "); |
c53ddacdc kbuild: fail kern... |
1915 1916 |
return err; |
1da177e4c Linux-2.6.12-rc2 |
1917 |
} |
5c3ead8c7 kbuild: apply Cod... |
1918 1919 |
static void add_depends(struct buffer *b, struct module *mod, struct module *modules) |
1da177e4c Linux-2.6.12-rc2 |
1920 1921 1922 1923 |
{ struct symbol *s; struct module *m; int first = 1; |
df578e7d8 kbuild: clean up ... |
1924 |
for (m = modules; m; m = m->next) |
1da177e4c Linux-2.6.12-rc2 |
1925 |
m->seen = is_vmlinux(m->name); |
1da177e4c Linux-2.6.12-rc2 |
1926 1927 1928 1929 1930 |
buf_printf(b, " "); buf_printf(b, "static const char __module_depends[] "); |
3ff6eecca remove __attribut... |
1931 1932 |
buf_printf(b, "__used "); |
1da177e4c Linux-2.6.12-rc2 |
1933 1934 1935 1936 |
buf_printf(b, "__attribute__((section(\".modinfo\"))) = "); buf_printf(b, "\"depends="); for (s = mod->unres; s; s = s->next) { |
a61b2dfd1 kbuild: fix segme... |
1937 |
const char *p; |
1da177e4c Linux-2.6.12-rc2 |
1938 1939 1940 1941 1942 1943 1944 |
if (!s->module) continue; if (s->module->seen) continue; s->module->seen = 1; |
df578e7d8 kbuild: clean up ... |
1945 1946 |
p = strrchr(s->module->name, '/'); if (p) |
a61b2dfd1 kbuild: fix segme... |
1947 1948 1949 1950 |
p++; else p = s->module->name; buf_printf(b, "%s%s", first ? "" : ",", p); |
1da177e4c Linux-2.6.12-rc2 |
1951 1952 1953 1954 1955 |
first = 0; } buf_printf(b, "\"; "); } |
5c3ead8c7 kbuild: apply Cod... |
1956 |
static void add_srcversion(struct buffer *b, struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
1957 1958 1959 1960 1961 1962 1963 1964 1965 |
{ if (mod->srcversion[0]) { buf_printf(b, " "); buf_printf(b, "MODULE_INFO(srcversion, \"%s\"); ", mod->srcversion); } } |
5c3ead8c7 kbuild: apply Cod... |
1966 |
static void write_if_changed(struct buffer *b, const char *fname) |
1da177e4c Linux-2.6.12-rc2 |
1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 |
{ 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... |
2009 |
/* parse Module.symvers file. line format: |
534b89a9f kbuild: fix segv ... |
2010 |
* 0x12345678<tab>symbol<tab>module[[<tab>export]<tab>something] |
bd5cbcedf kbuild: export-ty... |
2011 |
**/ |
040fcc819 kbuild: improved ... |
2012 |
static void read_dump(const char *fname, unsigned int kernel) |
1da177e4c Linux-2.6.12-rc2 |
2013 2014 2015 2016 |
{ unsigned long size, pos = 0; void *file = grab_file(fname, &size); char *line; |
df578e7d8 kbuild: clean up ... |
2017 |
if (!file) |
1da177e4c Linux-2.6.12-rc2 |
2018 2019 2020 2021 |
/* No symbol versions, silently ignore */ return; while ((line = get_next_line(&pos, file, size))) { |
534b89a9f kbuild: fix segv ... |
2022 |
char *symname, *modname, *d, *export, *end; |
1da177e4c Linux-2.6.12-rc2 |
2023 2024 |
unsigned int crc; struct module *mod; |
040fcc819 kbuild: improved ... |
2025 |
struct symbol *s; |
1da177e4c Linux-2.6.12-rc2 |
2026 2027 2028 2029 2030 2031 2032 |
if (!(symname = strchr(line, '\t'))) goto fail; *symname++ = '\0'; if (!(modname = strchr(symname, '\t'))) goto fail; *modname++ = '\0'; |
9ac545b0f kbuild: fix modul... |
2033 |
if ((export = strchr(modname, '\t')) != NULL) |
bd5cbcedf kbuild: export-ty... |
2034 |
*export++ = '\0'; |
534b89a9f kbuild: fix segv ... |
2035 2036 |
if (export && ((end = strchr(export, '\t')) != NULL)) *end = '\0'; |
1da177e4c Linux-2.6.12-rc2 |
2037 2038 2039 |
crc = strtoul(line, &d, 16); if (*symname == '\0' || *modname == '\0' || *d != '\0') goto fail; |
df578e7d8 kbuild: clean up ... |
2040 2041 2042 |
mod = find_module(modname); if (!mod) { if (is_vmlinux(modname)) |
1da177e4c Linux-2.6.12-rc2 |
2043 |
have_vmlinux = 1; |
0fa3a88cf kbuild: remove po... |
2044 |
mod = new_module(modname); |
1da177e4c Linux-2.6.12-rc2 |
2045 2046 |
mod->skip = 1; } |
bd5cbcedf kbuild: export-ty... |
2047 |
s = sym_add_exported(symname, mod, export_no(export)); |
8e70c4588 kbuild: warn abou... |
2048 2049 |
s->kernel = kernel; s->preloaded = 1; |
bd5cbcedf kbuild: export-ty... |
2050 |
sym_update_crc(symname, mod, crc, export_no(export)); |
1da177e4c Linux-2.6.12-rc2 |
2051 2052 2053 2054 2055 2056 |
} return; fail: fatal("parse error in symbol dump file "); } |
040fcc819 kbuild: improved ... |
2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 |
/* 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... |
2069 |
|
5c3ead8c7 kbuild: apply Cod... |
2070 |
static void write_dump(const char *fname) |
1da177e4c Linux-2.6.12-rc2 |
2071 2072 2073 2074 2075 2076 2077 2078 |
{ struct buffer buf = { }; struct symbol *symbol; int n; for (n = 0; n < SYMBOL_HASH_SIZE ; n++) { symbol = symbolhash[n]; while (symbol) { |
040fcc819 kbuild: improved ... |
2079 |
if (dump_sym(symbol)) |
bd5cbcedf kbuild: export-ty... |
2080 2081 |
buf_printf(&buf, "0x%08x\t%s\t%s\t%s ", |
62070fa42 kbuild: kill trai... |
2082 |
symbol->crc, symbol->name, |
bd5cbcedf kbuild: export-ty... |
2083 2084 |
symbol->module->name, export_str(symbol->export)); |
1da177e4c Linux-2.6.12-rc2 |
2085 2086 2087 2088 2089 |
symbol = symbol->next; } } write_if_changed(&buf, fname); } |
2d04b5ae1 kbuild: support l... |
2090 2091 2092 2093 |
struct ext_sym_list { struct ext_sym_list *next; const char *file; }; |
5c3ead8c7 kbuild: apply Cod... |
2094 |
int main(int argc, char **argv) |
1da177e4c Linux-2.6.12-rc2 |
2095 2096 2097 |
{ struct module *mod; struct buffer buf = { }; |
040fcc819 kbuild: improved ... |
2098 2099 |
char *kernel_read = NULL, *module_read = NULL; char *dump_write = NULL; |
1da177e4c Linux-2.6.12-rc2 |
2100 |
int opt; |
c53ddacdc kbuild: fail kern... |
2101 |
int err; |
2d04b5ae1 kbuild: support l... |
2102 2103 |
struct ext_sym_list *extsym_iter; struct ext_sym_list *extsym_start = NULL; |
1da177e4c Linux-2.6.12-rc2 |
2104 |
|
2d04b5ae1 kbuild: support l... |
2105 |
while ((opt = getopt(argc, argv, "i:I:e:cmsSo:awM:K:")) != -1) { |
df578e7d8 kbuild: clean up ... |
2106 2107 2108 2109 2110 2111 2112 2113 |
switch (opt) { case 'i': kernel_read = optarg; break; case 'I': module_read = optarg; external_module = 1; break; |
4ce6efed4 kbuild: soften mo... |
2114 2115 2116 |
case 'c': cross_build = 1; break; |
2d04b5ae1 kbuild: support l... |
2117 2118 2119 2120 2121 2122 2123 2124 |
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 ... |
2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 |
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... |
2137 2138 2139 |
case 'S': sec_mismatch_verbose = 0; break; |
df578e7d8 kbuild: clean up ... |
2140 2141 2142 2143 2144 |
case 'w': warn_unresolved = 1; break; default: exit(1); |
1da177e4c Linux-2.6.12-rc2 |
2145 2146 |
} } |
040fcc819 kbuild: improved ... |
2147 2148 2149 2150 |
if (kernel_read) read_dump(kernel_read, 1); if (module_read) read_dump(module_read, 0); |
2d04b5ae1 kbuild: support l... |
2151 2152 2153 2154 2155 2156 |
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 |
2157 |
|
df578e7d8 kbuild: clean up ... |
2158 |
while (optind < argc) |
1da177e4c Linux-2.6.12-rc2 |
2159 |
read_symbols(argv[optind++]); |
1da177e4c Linux-2.6.12-rc2 |
2160 2161 2162 2163 |
for (mod = modules; mod; mod = mod->next) { if (mod->skip) continue; |
c96fca213 kbuild: warn when... |
2164 |
check_exports(mod); |
b817f6fef kbuild: check lic... |
2165 |
} |
c53ddacdc kbuild: fail kern... |
2166 |
err = 0; |
b817f6fef kbuild: check lic... |
2167 |
for (mod = modules; mod; mod = mod->next) { |
666ab414f kbuild: fix a buf... |
2168 |
char fname[strlen(mod->name) + 10]; |
b817f6fef kbuild: check lic... |
2169 2170 |
if (mod->skip) continue; |
1da177e4c Linux-2.6.12-rc2 |
2171 2172 2173 2174 |
buf.pos = 0; add_header(&buf, mod); |
2449b8ba0 module,bug: Add T... |
2175 |
add_intree_flag(&buf, !external_module); |
a9860bf05 Staging: add TAIN... |
2176 |
add_staging_flag(&buf, mod->name); |
c53ddacdc kbuild: fail kern... |
2177 |
err |= add_versions(&buf, mod); |
1da177e4c Linux-2.6.12-rc2 |
2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 |
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... |
2188 |
if (sec_mismatch_count && !sec_mismatch_verbose) |
7c0ac495e kbuild/modpost: U... |
2189 2190 2191 2192 2193 2194 2195 |
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 |
2196 |
|
c53ddacdc kbuild: fail kern... |
2197 |
return err; |
1da177e4c Linux-2.6.12-rc2 |
2198 |
} |