diff options
| -rw-r--r-- | kernel/module.c | 372 |
1 files changed, 157 insertions, 215 deletions
diff --git a/kernel/module.c b/kernel/module.c index a64b26c..29dd232 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -152,42 +152,38 @@ void __module_put_and_exit(struct module *mod, long code) EXPORT_SYMBOL(__module_put_and_exit); /* Find a module section: 0 means not found. */ -static unsigned int find_sec(Elf_Ehdr *hdr, - Elf_Shdr *sechdrs, - const char *secstrings, - const char *name) +static unsigned int find_sec(const struct load_info *info, const char *name) { unsigned int i; - for (i = 1; i < hdr->e_shnum; i++) + for (i = 1; i < info->hdr->e_shnum; i++) { + Elf_Shdr *shdr = &info->sechdrs[i]; /* Alloc bit cleared means "ignore it." */ - if ((sechdrs[i].sh_flags & SHF_ALLOC) - && strcmp(secstrings+sechdrs[i].sh_name, name) == 0) + if ((shdr->sh_flags & SHF_ALLOC) + && strcmp(info->secstrings + shdr->sh_name, name) == 0) return i; + } return 0; } /* Find a module section, or NULL. */ -static void *section_addr(Elf_Ehdr *hdr, Elf_Shdr *shdrs, - const char *secstrings, const char *name) +static void *section_addr(const struct load_info *info, const char *name) { /* Section 0 has sh_addr 0. */ - return (void *)shdrs[find_sec(hdr, shdrs, secstrings, name)].sh_addr; + return (void *)info->sechdrs[find_sec(info, name)].sh_addr; } /* Find a module section, or NULL. Fill in number of "objects" in section. */ -static void *section_objs(Elf_Ehdr *hdr, - Elf_Shdr *sechdrs, - const char *secstrings, +static void *section_objs(const struct load_info *info, const char *name, size_t object_size, unsigned int *num) { - unsigned int sec = find_sec(hdr, sechdrs, secstrings, name); + unsigned int sec = find_sec(info, name); /* Section 0 has sh_addr 0 and sh_size 0. */ - *num = sechdrs[sec].sh_size / object_size; - return (void *)sechdrs[sec].sh_addr; + *num = info->sechdrs[sec].sh_size / object_size; + return (void *)info->sechdrs[sec].sh_addr; } /* Provided by the linker */ @@ -417,11 +413,9 @@ static void percpu_modfree(struct module *mod) free_percpu(mod->percpu); } -static unsigned int find_pcpusec(Elf_Ehdr *hdr, - Elf_Shdr *sechdrs, - const char *secstrings) +static unsigned int find_pcpusec(struct load_info *info) { - return find_sec(hdr, sechdrs, secstrings, ".data..percpu"); + return find_sec(info, ".data..percpu"); } static void percpu_modcopy(struct module *mod, @@ -481,9 +475,7 @@ static inline int percpu_modalloc(struct module *mod, static inline void percpu_modfree(struct module *mod) { } -static inline unsigned int find_pcpusec(Elf_Ehdr *hdr, - Elf_Shdr *sechdrs, - const char *secstrings) +static unsigned int find_pcpusec(struct load_info *info) { return 0; } @@ -1067,10 +1059,9 @@ static inline int same_magic(const char *amagic, const char *bmagic, #endif /* CONFIG_MODVERSIONS */ /* Resolve a symbol for this module. I.e. if we find one, record usage. */ -static const struct kernel_symbol *resolve_symbol(Elf_Shdr *sechdrs, - unsigned int versindex, +static const struct kernel_symbol *resolve_symbol(struct module *mod, + const struct load_info *info, const char *name, - struct module *mod, char ownername[]) { struct module *owner; @@ -1084,7 +1075,8 @@ static const struct kernel_symbol *resolve_symbol(Elf_Shdr *sechdrs, if (!sym) goto unlock; - if (!check_version(sechdrs, versindex, name, mod, crc, owner)) { + if (!check_version(info->sechdrs, info->index.vers, name, mod, crc, + owner)) { sym = ERR_PTR(-EINVAL); goto getname; } @@ -1103,21 +1095,20 @@ unlock: return sym; } -static const struct kernel_symbol *resolve_symbol_wait(Elf_Shdr *sechdrs, - unsigned int versindex, - const char *name, - struct module *mod) +static const struct kernel_symbol * +resolve_symbol_wait(struct module *mod, + const struct load_info *info, + const char *name) { const struct kernel_symbol *ksym; - char ownername[MODULE_NAME_LEN]; + char owner[MODULE_NAME_LEN]; if (wait_event_interruptible_timeout(module_wq, - !IS_ERR(ksym = resolve_symbol(sechdrs, versindex, name, - mod, ownername)) || - PTR_ERR(ksym) != -EBUSY, + !IS_ERR(ksym = resolve_symbol(mod, info, name, owner)) + || PTR_ERR(ksym) != -EBUSY, 30 * HZ) <= 0) { printk(KERN_WARNING "%s: gave up waiting for init of module %s.\n", - mod->name, ownername); + mod->name, owner); } return ksym; } @@ -1640,25 +1631,23 @@ static int verify_export_symbols(struct module *mod) } /* Change all symbols so that st_value encodes the pointer directly. */ -static int simplify_symbols(Elf_Shdr *sechdrs, - unsigned int symindex, - const char *strtab, - unsigned int versindex, - unsigned int pcpuindex, - struct module *mod) -{ - Elf_Sym *sym = (void *)sechdrs[symindex].sh_addr; +static int simplify_symbols(struct module *mod, const struct load_info *info) +{ + Elf_Shdr *symsec = &info->sechdrs[info->index.sym]; + Elf_Sym *sym = (void *)symsec->sh_addr; unsigned long secbase; - unsigned int i, n = sechdrs[symindex].sh_size / sizeof(Elf_Sym); + unsigned int i; int ret = 0; const struct kernel_symbol *ksym; - for (i = 1; i < n; i++) { + for (i = 1; i < symsec->sh_size / sizeof(Elf_Sym); i++) { + const char *name = info->strtab + sym[i].st_name; + switch (sym[i].st_shndx) { case SHN_COMMON: /* We compiled with -fno-common. These are not supposed to happen. */ - DEBUGP("Common symbol: %s\n", strtab + sym[i].st_name); + DEBUGP("Common symbol: %s\n", name); printk("%s: please compile with -fno-common\n", mod->name); ret = -ENOEXEC; @@ -1671,9 +1660,7 @@ static int simplify_symbols(Elf_Shdr *sechdrs, break; case SHN_UNDEF: - ksym = resolve_symbol_wait(sechdrs, versindex, - strtab + sym[i].st_name, - mod); + ksym = resolve_symbol_wait(mod, info, name); /* Ok if resolved. */ if (ksym && !IS_ERR(ksym)) { sym[i].st_value = ksym->value; @@ -1685,17 +1672,16 @@ static int simplify_symbols(Elf_Shdr *sechdrs, break; printk(KERN_WARNING "%s: Unknown symbol %s (err %li)\n", - mod->name, strtab + sym[i].st_name, - PTR_ERR(ksym)); + mod->name, name, PTR_ERR(ksym)); ret = PTR_ERR(ksym) ?: -ENOENT; break; default: /* Divert to percpu allocation if a percpu var. */ - if (sym[i].st_shndx == pcpuindex) + if (sym[i].st_shndx == info->index.pcpu) secbase = (unsigned long)mod_percpu(mod); else - secbase = sechdrs[sym[i].st_shndx].sh_addr; + secbase = info->sechdrs[sym[i].st_shndx].sh_addr; sym[i].st_value += secbase; break; } @@ -1704,33 +1690,29 @@ static int simplify_symbols(Elf_Shdr *sechdrs, return ret; } -static int apply_relocations(struct module *mod, - Elf_Ehdr *hdr, - Elf_Shdr *sechdrs, - unsigned int symindex, - unsigned int strindex) +static int apply_relocations(struct module *mod, const struct load_info *info) { unsigned int i; int err = 0; /* Now do relocations. */ - for (i = 1; i < hdr->e_shnum; i++) { - const char *strtab = (char *)sechdrs[strindex].sh_addr; - unsigned int info = sechdrs[i].sh_info; + for (i = 1; i < info->hdr->e_shnum; i++) { + unsigned int infosec = info->sechdrs[i].sh_info; /* Not a valid relocation section? */ - if (info >= hdr->e_shnum) + if (infosec >= info->hdr->e_shnum) continue; /* Don't bother with non-allocated sections */ - if (!(sechdrs[info].sh_flags & SHF_ALLOC)) + if (!(info->sechdrs[infosec].sh_flags & SHF_ALLOC)) continue; - if (sechdrs[i].sh_type == SHT_REL) - err = apply_relocate(sechdrs, strtab, symindex, i, mod); - else if (sechdrs[i].sh_type == SHT_RELA) - err = apply_relocate_add(sechdrs, strtab, symindex, i, - mod); + if (info->sechdrs[i].sh_type == SHT_REL) + err = apply_relocate(info->sechdrs, info->strtab, + info->index.sym, i, mod); + else if (info->sechdrs[i].sh_type == SHT_RELA) + err = apply_relocate_add(info->sechdrs, info->strtab, + info->index.sym, i, mod); if (err < 0) break; } @@ -1761,10 +1743,7 @@ static long get_offset(struct module *mod, unsigned int *size, might -- code, read-only data, read-write data, small data. Tally sizes, and place the offsets into sh_entsize fields: high bit means it belongs in init. */ -static void layout_sections(struct module *mod, - const Elf_Ehdr *hdr, - Elf_Shdr *sechdrs, - const char *secstrings) +static void layout_sections(struct module *mod, struct load_info *info) { static unsigned long const masks[][2] = { /* NOTE: all executable code must be the first section @@ -1777,21 +1756,22 @@ static void layout_sections(struct module *mod, }; unsigned int m, i; - for (i = 0; i < hdr->e_shnum; i++) - sechdrs[i].sh_entsize = ~0UL; + for (i = 0; i < info->hdr->e_shnum; i++) + info->sechdrs[i].sh_entsize = ~0UL; DEBUGP("Core section allocation order:\n"); for (m = 0; m < ARRAY_SIZE(masks); ++m) { - for (i = 0; i < hdr->e_shnum; ++i) { - Elf_Shdr *s = &sechdrs[i]; + for (i = 0; i < info->hdr->e_shnum; ++i) { + Elf_Shdr *s = &info->sechdrs[i]; + const char *sname = info->secstrings + s->sh_name; if ((s->sh_flags & masks[m][0]) != masks[m][0] || (s->sh_flags & masks[m][1]) || s->sh_entsize != ~0UL - || strstarts(secstrings + s->sh_name, ".init")) + || strstarts(sname, ".init")) continue; s->sh_entsize = get_offset(mod, &mod->core_size, s, i); - DEBUGP("\t%s\n", secstrings + s->sh_name); + DEBUGP("\t%s\n", name); } if (m == 0) mod->core_text_size = mod->core_size; @@ -1799,17 +1779,18 @@ static void layout_sections(struct module *mod, DEBUGP("Init section allocation order:\n"); for (m = 0; m < ARRAY_SIZE(masks); ++m) { - for (i = 0; i < hdr->e_shnum; ++i) { - Elf_Shdr *s = &sechdrs[i]; + for (i = 0; i < info->hdr->e_shnum; ++i) { + Elf_Shdr *s = &info->sechdrs[i]; + const char *sname = info->secstrings + s->sh_name; if ((s->sh_flags & masks[m][0]) != masks[m][0] || (s->sh_flags & masks[m][1]) || s->sh_entsize != ~0UL - || !strstarts(secstrings + s->sh_name, ".init")) + || !strstarts(sname, ".init")) continue; s->sh_entsize = (get_offset(mod, &mod->init_size, s, i) | INIT_OFFSET_MASK); - DEBUGP("\t%s\n", secstrings + s->sh_name); + DEBUGP("\t%s\n", sname); } if (m == 0) mod->init_text_size = mod->init_size; @@ -1848,33 +1829,28 @@ static char *next_string(char *string, unsigned long *secsize) return string; } -static char *get_modinfo(const Elf_Shdr *sechdrs, - unsigned int info, - const char *tag) +static char *get_modinfo(struct load_info *info, const char *tag) { char *p; unsigned int taglen = strlen(tag); - unsigned long size = sechdrs[info].sh_size; + Elf_Shdr *infosec = &info->sechdrs[info->index.info]; + unsigned long size = infosec->sh_size; - for (p = (char *)sechdrs[info].sh_addr; p; p = next_string(p, &size)) { + for (p = (char *)infosec->sh_addr; p; p = next_string(p, &size)) { if (strncmp(p, tag, taglen) == 0 && p[taglen] == '=') return p + taglen + 1; } return NULL; } -static void setup_modinfo(struct module *mod, Elf_Shdr *sechdrs, - unsigned int infoindex) +static void setup_modinfo(struct module *mod, struct load_info *info) { struct module_attribute *attr; int i; for (i = 0; (attr = modinfo_attrs[i]); i++) { if (attr->setup) - attr->setup(mod, - get_modinfo(sechdrs, - infoindex, - attr->attr.name)); + attr->setup(mod, get_modinfo(info, attr->attr.name)); } } @@ -1976,56 +1952,45 @@ static bool is_core_symbol(const Elf_Sym *src, const Elf_Shdr *sechdrs, return true; } -static unsigned long layout_symtab(struct module *mod, - Elf_Shdr *sechdrs, - unsigned int symindex, - unsigned int strindex, - const Elf_Ehdr *hdr, - const char *secstrings, - unsigned long *pstroffs, - unsigned long *strmap) +static void layout_symtab(struct module *mod, struct load_info *info) { - unsigned long symoffs; - Elf_Shdr *symsect = sechdrs + symindex; - Elf_Shdr *strsect = sechdrs + strindex; + Elf_Shdr *symsect = info->sechdrs + info->index.sym; + Elf_Shdr *strsect = info->sechdrs + info->index.str; const Elf_Sym *src; - const char *strtab; unsigned int i, nsrc, ndst; /* Put symbol section at end of init part of module. */ symsect->sh_flags |= SHF_ALLOC; symsect->sh_entsize = get_offset(mod, &mod->init_size, symsect, - symindex) | INIT_OFFSET_MASK; - DEBUGP("\t%s\n", secstrings + symsect->sh_name); + info->index.sym) | INIT_OFFSET_MASK; + DEBUGP("\t%s\n", info->secstrings + symsect->sh_name); - src = (void *)hdr + symsect->sh_offset; + src = (void *)info->hdr + symsect->sh_offset; nsrc = symsect->sh_size / sizeof(*src); - strtab = (void *)hdr + strsect->sh_offset; for (ndst = i = 1; i < nsrc; ++i, ++src) - if (is_core_symbol(src, sechdrs, hdr->e_shnum)) { + if (is_core_symbol(src, info->sechdrs, info->hdr->e_shnum)) { unsigned int j = src->st_name; - while(!__test_and_set_bit(j, strmap) && strtab[j]) + while (!__test_and_set_bit(j, info->strmap) + && info->strtab[j]) ++j; ++ndst; } /* Append room for core symbols at end of core part. */ - symoffs = ALIGN(mod->core_size, symsect->sh_addralign ?: 1); - mod->core_size = symoffs + ndst * sizeof(Elf_Sym); + info->symoffs = ALIGN(mod->core_size, symsect->sh_addralign ?: 1); + mod->core_size = info->symoffs + ndst * sizeof(Elf_Sym); /* Put string table section at end of init part of module. */ strsect->sh_flags |= SHF_ALLOC; strsect->sh_entsize = get_offset(mod, &mod->init_size, strsect, - strindex) | INIT_OFFSET_MASK; - DEBUGP("\t%s\n", secstrings + strsect->sh_name); + info->index.str) | INIT_OFFSET_MASK; + DEBUGP("\t%s\n", info->secstrings + strsect->sh_name); /* Append room for core symbols' strings at end of core part. */ - *pstroffs = mod->core_size; - __set_bit(0, strmap); - mod->core_size += bitmap_weight(strmap, strsect->sh_size); - - return symoffs; + info->stroffs = mod->core_size; + __set_bit(0, info->strmap); + mod->core_size += bitmap_weight(info->strmap, strsect->sh_size); } static void add_kallsyms(struct module *mod, struct load_info *info) @@ -2064,16 +2029,8 @@ static void add_kallsyms(struct module *mod, struct load_info *info) *++s = mod->strtab[i]; } #else -static inline unsigned long layout_symtab(struct module *mod, - Elf_Shdr *sechdrs, - unsigned int symindex, - unsigned int strindex, - const Elf_Ehdr *hdr, - const char *secstrings, - unsigned long *pstroffs, - unsigned long *strmap) +static inline void layout_symtab(struct module *mod, struct load_info *info) { - return 0; } static void add_kallsyms(struct module *mod, struct load_info *info) @@ -2113,30 +2070,28 @@ static void *module_alloc_update_bounds(unsigned long size) } #ifdef CONFIG_DEBUG_KMEMLEAK -static void kmemleak_load_module(struct module *mod, Elf_Ehdr *hdr, - const Elf_Shdr *sechdrs, - const char *secstrings) +static void kmemleak_load_module(const struct module *mod, + const struct load_info *info) { unsigned int i; /* only scan the sections containing data */ kmemleak_scan_area(mod, sizeof(struct module), GFP_KERNEL); - for (i = 1; i < hdr->e_shnum; i++) { - if (!(sechdrs[i].sh_flags & SHF_ALLOC)) + for (i = 1; i < info->hdr->e_shnum; i++) { + const char *name = info->secstrings + info->sechdrs[i].sh_name; + if (!(info->sechdrs[i].sh_flags & SHF_ALLOC)) continue; - if (strncmp(secstrings + sechdrs[i].sh_name, ".data", 5) != 0 - && strncmp(secstrings + sechdrs[i].sh_name, ".bss", 4) != 0) + if (!strstarts(name, ".data") && !strstarts(name, ".bss")) continue; - kmemleak_scan_area((void *)sechdrs[i].sh_addr, - sechdrs[i].sh_size, GFP_KERNEL); + kmemleak_scan_area((void *)info->sechdrs[i].sh_addr, + info->sechdrs[i].sh_size, GFP_KERNEL); } } #else -static inline void kmemleak_load_module(struct module *mod, Elf_Ehdr *hdr, - Elf_Shdr *sechdrs, - const char *secstrings) +static inline void kmemleak_load_module(const struct module *mod, + const struct load_info *info) { } #endif @@ -2227,8 +2182,8 @@ static int rewrite_section_headers(struct load_info *info) } /* Track but don't keep modinfo and version sections. */ - info->index.vers = find_sec(info->hdr, info->sechdrs, info->secstrings, "__versions"); - info->index.info = find_sec(info->hdr, info->sechdrs, info->secstrings, ".modinfo"); + info->index.vers = find_sec(info, "__versions"); + info->index.info = find_sec(info, ".modinfo"); info->sechdrs[info->index.info].sh_flags &= ~(unsigned long)SHF_ALLOC; info->sechdrs[info->index.vers].sh_flags &= ~(unsigned long)SHF_ALLOC; return 0; @@ -2268,8 +2223,7 @@ static struct module *setup_load_info(struct load_info *info) } } - info->index.mod = find_sec(info->hdr, info->sechdrs, info->secstrings, - ".gnu.linkonce.this_module"); + info->index.mod = find_sec(info, ".gnu.linkonce.this_module"); if (!info->index.mod) { printk(KERN_WARNING "No module found in object\n"); return ERR_PTR(-ENOEXEC); @@ -2283,7 +2237,7 @@ static struct module *setup_load_info(struct load_info *info) return ERR_PTR(-ENOEXEC); } - info->index.pcpu = find_pcpusec(info->hdr, info->sechdrs, info->secstrings); + info->index.pcpu = find_pcpusec(info); /* Check module struct version now, before we try to use module. */ if (!check_modstruct_version(info->sechdrs, info->index.vers, mod)) @@ -2292,11 +2246,9 @@ static struct module *setup_load_info(struct load_info *info) return mod; } -static int check_modinfo(struct module *mod, - const Elf_Shdr *sechdrs, - unsigned int infoindex, unsigned int versindex) +static int check_modinfo(struct module *mod, struct load_info *info) { - const char *modmagic = get_modinfo(sechdrs, infoindex, "vermagic"); + const char *modmagic = get_modinfo(info, "vermagic"); int err; /* This is allowed: modprobe --force will invalidate it. */ @@ -2304,13 +2256,13 @@ static int check_modinfo(struct module *mod, err = try_to_force_load(mod, "bad vermagic"); if (err) return err; - } else if (!same_magic(modmagic, vermagic, versindex)) { + } else if (!same_magic(modmagic, vermagic, info->index.vers)) { printk(KERN_ERR "%s: version magic '%s' should be '%s'\n", mod->name, modmagic, vermagic); return -ENOEXEC; } - if (get_modinfo(sechdrs, infoindex, "staging")) { + if (get_modinfo(info, "staging")) { add_taint_module(mod, TAINT_CRAP); printk(KERN_WARNING "%s: module is from the staging directory," " the quality is unknown, you have been warned.\n", @@ -2318,58 +2270,51 @@ static int check_modinfo(struct module *mod, } /* Set up license info based on the info section */ - set_license(mod, get_modinfo(sechdrs, infoindex, "license")); + set_license(mod, get_modinfo(info, "license")); return 0; } -static void find_module_sections(struct module *mod, Elf_Ehdr *hdr, - Elf_Shdr *sechdrs, const char *secstrings) +static void find_module_sections(struct module *mod, + const struct load_info *info) { - mod->kp = section_objs(hdr, sechdrs, secstrings, "__param", + mod->kp = section_objs(info, "__param", sizeof(*mod->kp), &mod->num_kp); - mod->syms = section_objs(hdr, sechdrs, secstrings, "__ksymtab", + mod->syms = section_objs(info, "__ksymtab", sizeof(*mod->syms), &mod->num_syms); - mod->crcs = section_addr(hdr, sechdrs, secstrings, "__kcrctab"); - mod->gpl_syms = section_objs(hdr, sechdrs, secstrings, "__ksymtab_gpl", + mod->crcs = section_addr(info, "__kcrctab"); + mod->gpl_syms = section_objs(info, "__ksymtab_gpl", sizeof(*mod->gpl_syms), &mod->num_gpl_syms); - mod->gpl_crcs = section_addr(hdr, sechdrs, secstrings, "__kcrctab_gpl"); - mod->gpl_future_syms = section_objs(hdr, sechdrs, secstrings, + mod->gpl_crcs = section_addr(info, "__kcrctab_gpl"); + mod->gpl_future_syms = section_objs(info, "__ksymtab_gpl_future", sizeof(*mod->gpl_future_syms), &mod->num_gpl_future_syms); - mod->gpl_future_crcs = section_addr(hdr, sechdrs, secstrings, - "__kcrctab_gpl_future"); + mod->gpl_future_crcs = section_addr(info, "__kcrctab_gpl_future"); #ifdef CONFIG_UNUSED_SYMBOLS - mod->unused_syms = section_objs(hdr, sechdrs, secstrings, - "__ksymtab_unused", + mod->unused_syms = section_objs(info, "__ksymtab_unused", sizeof(*mod->unused_syms), &mod->num_unused_syms); - mod->unused_crcs = section_addr(hdr, sechdrs, secstrings, - "__kcrctab_unused"); - mod->unused_gpl_syms = section_objs(hdr, sechdrs, secstrings, - "__ksymtab_unused_gpl", + mod->unused_crcs = section_addr(info, "__kcrctab_unused"); + mod->unused_gpl_syms = section_objs(info, "__ksymtab_unused_gpl", sizeof(*mod->unused_gpl_syms), &mod->num_unused_gpl_syms); - mod->unused_gpl_crcs = section_addr(hdr, sechdrs, secstrings, - "__kcrctab_unused_gpl"); + mod->unused_gpl_crcs = section_addr(info, "__kcrctab_unused_gpl"); #endif #ifdef CONFIG_CONSTRUCTORS - mod->ctors = section_objs(hdr, sechdrs, secstrings, ".ctors", + mod->ctors = section_objs(info, ".ctors", sizeof(*mod->ctors), &mod->num_ctors); #endif #ifdef CONFIG_TRACEPOINTS - mod->tracepoints = section_objs(hdr, sechdrs, secstrings, - "__tracepoints", + mod->tracepoints = section_objs(info, "__tracepoints", sizeof(*mod->tracepoints), &mod->num_tracepoints); #endif #ifdef CONFIG_EVENT_TRACING - mod->trace_events = section_objs(hdr, sechdrs, secstrings, - "_ftrace_events", + mod->trace_events = section_objs(info, "_ftrace_events", sizeof(*mod->trace_events), &mod->num_trace_events); /* @@ -2381,20 +2326,17 @@ static void find_module_sections(struct module *mod, Elf_Ehdr *hdr, #endif #ifdef CONFIG_FTRACE_MCOUNT_RECORD /* sechdrs[0].sh_size is always zero */ - mod->ftrace_callsites = section_objs(hdr, sechdrs, secstrings, - "__mcount_loc", + mod->ftrace_callsites = section_objs(info, "__mcount_loc", sizeof(*mod->ftrace_callsites), &mod->num_ftrace_callsites); #endif - if (section_addr(hdr, sechdrs, secstrings, "__obsparm")) + if (section_addr(info, "__obsparm")) printk(KERN_WARNING "%s: Ignoring obsolete parameters\n", mod->name); } -static int move_module(struct module *mod, - Elf_Ehdr *hdr, Elf_Shdr *sechdrs, - const char *secstrings, unsigned modindex) +static int move_module(struct module *mod, struct load_info *info) { int i; void *ptr; @@ -2430,32 +2372,31 @@ static int move_module(struct module *mod, /* Transfer each section which specifies SHF_ALLOC */ DEBUGP("final section addresses:\n"); - for (i = 0; i < hdr->e_shnum; i++) { + for (i = 0; i < info->hdr->e_shnum; i++) { void *dest; + Elf_Shdr *shdr = &info->sechdrs[i]; - if (!(sechdrs[i].sh_flags & SHF_ALLOC)) + if (!(shdr->sh_flags & SHF_ALLOC)) continue; - if (sechdrs[i].sh_entsize & INIT_OFFSET_MASK) + if (shdr->sh_entsize & INIT_OFFSET_MASK) dest = mod->module_init - + (sechdrs[i].sh_entsize & ~INIT_OFFSET_MASK); + + (shdr->sh_entsize & ~INIT_OFFSET_MASK); else - dest = mod->module_core + sechdrs[i].sh_entsize; + dest = mod->module_core + shdr->sh_entsize; - if (sechdrs[i].sh_type != SHT_NOBITS) - memcpy(dest, (void *)sechdrs[i].sh_addr, - sechdrs[i].sh_size); + if (shdr->sh_type != SHT_NOBITS) + memcpy(dest, (void *)shdr->sh_addr, shdr->sh_size); /* Update sh_addr to point to copy in image. */ - sechdrs[i].sh_addr = (unsigned long)dest; + shdr->sh_addr = (unsigned long)dest; DEBUGP("\t0x%lx %s\n", - sechdrs[i].sh_addr, secstrings + sechdrs[i].sh_name); + shdr->sh_addr, info->secstrings + shdr->sh_name); } return 0; } -static int check_module_license_and_versions(struct module *mod, - Elf_Shdr *sechdrs) +static int check_module_license_and_versions(struct module *mod) { /* * ndiswrapper is under GPL by itself, but loads proprietary modules. @@ -2512,34 +2453,37 @@ static struct module *layout_and_allocate(struct load_info *info) { /* Module within temporary copy. */ struct module *mod; + Elf_Shdr *pcpusec; int err; mod = setup_load_info(info); if (IS_ERR(mod)) return mod; - err = check_modinfo(mod, info->sechdrs, info->index.info, info->index.vers); + err = check_modinfo(mod, info); if (err) return ERR_PTR(err); /* Allow arches to frob section contents and sizes. */ - err = module_frob_arch_sections(info->hdr, info->sechdrs, info->secstrings, mod); + err = module_frob_arch_sections(info->hdr, info->sechdrs, + info->secstrings, mod); if (err < 0) goto free_args; - if (info->index.pcpu) { + pcpusec = &info->sechdrs[info->index.pcpu]; + if (pcpusec->sh_size) { /* We have a special allocation for this section. */ - err = percpu_modalloc(mod, info->sechdrs[info->index.pcpu].sh_size, - info->sechdrs[info->index.pcpu].sh_addralign); + err = percpu_modalloc(mod, + pcpusec->sh_size, pcpusec->sh_addralign); if (err) goto free_args; - info->sechdrs[info->index.pcpu].sh_flags &= ~(unsigned long)SHF_ALLOC; + pcpusec->sh_flags &= ~(unsigned long)SHF_ALLOC; } /* Determine total sizes, and put offsets in sh_entsize. For now this is done generically; there doesn't appear to be any special cases for the architectures. */ - layout_sections(mod, info->hdr, info->sechdrs, info->secstrings); + layout_sections(mod, info); info->strmap = kzalloc(BITS_TO_LONGS(info->sechdrs[info->index.str].sh_size) * sizeof(long), GFP_KERNEL); @@ -2547,17 +2491,16 @@ static struct module *layout_and_allocate(struct load_info *info) err = -ENOMEM; goto free_percpu; } - info->symoffs = layout_symtab(mod, info->sechdrs, info->index.sym, info->index.str, info->hdr, - info->secstrings, &info->stroffs, info->strmap); + layout_symtab(mod, info); /* Allocate and move to the final place */ - err = move_module(mod, info->hdr, info->sechdrs, info->secstrings, info->index.mod); + err = move_module(mod, info); if (err) goto free_strmap; /* Module has been copied to its final place now: return it. */ mod = (void *)info->sechdrs[info->index.mod].sh_addr; - kmemleak_load_module(mod, info->hdr, info->sechdrs, info->secstrings); + kmemleak_load_module(mod, info); return mod; free_strmap: @@ -2605,34 +2548,33 @@ static noinline struct module *load_module(void __user *umod, goto free_copy; } - /* Now we've moved module, initialize linked lists, etc. */ + /* Now module is in final location, initialize linked lists, etc. */ err = module_unload_init(mod); if (err) goto free_module; /* Now we've got everything in the final locations, we can * find optional sections. */ - find_module_sections(mod, info.hdr, info.sechdrs, info.secstrings); + find_module_sections(mod, &info); - err = check_module_license_and_versions(mod, info.sechdrs); + err = check_module_license_and_versions(mod); if (err) goto free_unload; /* Set up MODINFO_ATTR fields */ - setup_modinfo(mod, info.sechdrs, info.index.info); + setup_modinfo(mod, &info); /* Fix up syms, so that st_value is a pointer to location. */ - err = simplify_symbols(info.sechdrs, info.index.sym, info.strtab, info.index.vers, info.index.pcpu, - mod); + err = simplify_symbols(mod, &info); if (err < 0) goto free_modinfo; - err = apply_relocations(mod, info.hdr, info.sechdrs, info.index.sym, info.index.str); + err = apply_relocations(mod, &info); if (err < 0) goto free_modinfo; /* Set up and sort exception table */ - mod->extable = section_objs(info.hdr, info.sechdrs, info.secstrings, "__ex_table", + mod->extable = section_objs(&info, "__ex_table", sizeof(*mod->extable), &mod->num_exentries); sort_extable(mod->extable, mod->extable + mod->num_exentries); @@ -2643,7 +2585,7 @@ static noinline struct module *load_module(void __user *umod, add_kallsyms(mod, &info); if (!mod->taints) - debug = section_objs(info.hdr, info.sechdrs, info.secstrings, "__verbose", + debug = section_objs(&info, "__verbose", sizeof(*debug), &num_debug); err = module_finalize(info.hdr, info.sechdrs, mod); |
