diff options
Diffstat (limited to 'kernel/module/kallsyms.c')
| -rw-r--r-- | kernel/module/kallsyms.c | 58 |
1 files changed, 33 insertions, 25 deletions
diff --git a/kernel/module/kallsyms.c b/kernel/module/kallsyms.c index ab2376a1be88..8e89f459ffdd 100644 --- a/kernel/module/kallsyms.c +++ b/kernel/module/kallsyms.c @@ -78,6 +78,7 @@ static bool is_core_symbol(const Elf_Sym *src, const Elf_Shdr *sechdrs, unsigned int shnum, unsigned int pcpundx) { const Elf_Shdr *sec; + enum mod_mem_type type; if (src->st_shndx == SHN_UNDEF || src->st_shndx >= shnum || @@ -90,11 +91,12 @@ static bool is_core_symbol(const Elf_Sym *src, const Elf_Shdr *sechdrs, #endif sec = sechdrs + src->st_shndx; + type = sec->sh_entsize >> SH_ENTSIZE_TYPE_SHIFT; if (!(sec->sh_flags & SHF_ALLOC) #ifndef CONFIG_KALLSYMS_ALL || !(sec->sh_flags & SHF_EXECINSTR) #endif - || (sec->sh_entsize & INIT_OFFSET_MASK)) + || mod_mem_type_is_init(type)) return false; return true; @@ -113,11 +115,13 @@ void layout_symtab(struct module *mod, struct load_info *info) Elf_Shdr *strsect = info->sechdrs + info->index.str; const Elf_Sym *src; unsigned int i, nsrc, ndst, strtab_size = 0; + struct module_memory *mod_mem_data = &mod->mem[MOD_DATA]; + struct module_memory *mod_mem_init_data = &mod->mem[MOD_INIT_DATA]; /* Put symbol section at end of init part of module. */ symsect->sh_flags |= SHF_ALLOC; - symsect->sh_entsize = module_get_offset(mod, &mod->init_layout.size, symsect, - info->index.sym) | INIT_OFFSET_MASK; + symsect->sh_entsize = module_get_offset_and_type(mod, MOD_INIT_DATA, + symsect, info->index.sym); pr_debug("\t%s\n", info->secstrings + symsect->sh_name); src = (void *)info->hdr + symsect->sh_offset; @@ -134,28 +138,27 @@ void layout_symtab(struct module *mod, struct load_info *info) } /* Append room for core symbols at end of core part. */ - info->symoffs = ALIGN(mod->data_layout.size, symsect->sh_addralign ?: 1); - info->stroffs = mod->data_layout.size = info->symoffs + ndst * sizeof(Elf_Sym); - mod->data_layout.size += strtab_size; + info->symoffs = ALIGN(mod_mem_data->size, symsect->sh_addralign ?: 1); + info->stroffs = mod_mem_data->size = info->symoffs + ndst * sizeof(Elf_Sym); + mod_mem_data->size += strtab_size; /* Note add_kallsyms() computes strtab_size as core_typeoffs - stroffs */ - info->core_typeoffs = mod->data_layout.size; - mod->data_layout.size += ndst * sizeof(char); - mod->data_layout.size = strict_align(mod->data_layout.size); + info->core_typeoffs = mod_mem_data->size; + mod_mem_data->size += ndst * sizeof(char); /* Put string table section at end of init part of module. */ strsect->sh_flags |= SHF_ALLOC; - strsect->sh_entsize = module_get_offset(mod, &mod->init_layout.size, strsect, - info->index.str) | INIT_OFFSET_MASK; + strsect->sh_entsize = module_get_offset_and_type(mod, MOD_INIT_DATA, + strsect, info->index.str); pr_debug("\t%s\n", info->secstrings + strsect->sh_name); /* We'll tack temporary mod_kallsyms on the end. */ - mod->init_layout.size = ALIGN(mod->init_layout.size, - __alignof__(struct mod_kallsyms)); - info->mod_kallsyms_init_off = mod->init_layout.size; - mod->init_layout.size += sizeof(struct mod_kallsyms); - info->init_typeoffs = mod->init_layout.size; - mod->init_layout.size += nsrc * sizeof(char); - mod->init_layout.size = strict_align(mod->init_layout.size); + mod_mem_init_data->size = ALIGN(mod_mem_init_data->size, + __alignof__(struct mod_kallsyms)); + info->mod_kallsyms_init_off = mod_mem_init_data->size; + + mod_mem_init_data->size += sizeof(struct mod_kallsyms); + info->init_typeoffs = mod_mem_init_data->size; + mod_mem_init_data->size += nsrc * sizeof(char); } /* @@ -171,9 +174,11 @@ void add_kallsyms(struct module *mod, const struct load_info *info) char *s; Elf_Shdr *symsec = &info->sechdrs[info->index.sym]; unsigned long strtab_size; + void *data_base = mod->mem[MOD_DATA].base; + void *init_data_base = mod->mem[MOD_INIT_DATA].base; /* Set up to point into init section. */ - mod->kallsyms = (void __rcu *)mod->init_layout.base + + mod->kallsyms = (void __rcu *)init_data_base + info->mod_kallsyms_init_off; rcu_read_lock(); @@ -183,15 +188,15 @@ void add_kallsyms(struct module *mod, const struct load_info *info) /* Make sure we get permanent strtab: don't use info->strtab. */ rcu_dereference(mod->kallsyms)->strtab = (void *)info->sechdrs[info->index.str].sh_addr; - rcu_dereference(mod->kallsyms)->typetab = mod->init_layout.base + info->init_typeoffs; + rcu_dereference(mod->kallsyms)->typetab = init_data_base + info->init_typeoffs; /* * Now populate the cut down core kallsyms for after init * and set types up while we still have access to sections. */ - mod->core_kallsyms.symtab = dst = mod->data_layout.base + info->symoffs; - mod->core_kallsyms.strtab = s = mod->data_layout.base + info->stroffs; - mod->core_kallsyms.typetab = mod->data_layout.base + info->core_typeoffs; + mod->core_kallsyms.symtab = dst = data_base + info->symoffs; + mod->core_kallsyms.strtab = s = data_base + info->stroffs; + mod->core_kallsyms.typetab = data_base + info->core_typeoffs; strtab_size = info->core_typeoffs - info->stroffs; src = rcu_dereference(mod->kallsyms)->symtab; for (ndst = i = 0; i < rcu_dereference(mod->kallsyms)->num_symtab; i++) { @@ -267,12 +272,15 @@ static const char *find_kallsyms_symbol(struct module *mod, unsigned int i, best = 0; unsigned long nextval, bestval; struct mod_kallsyms *kallsyms = rcu_dereference_sched(mod->kallsyms); + struct module_memory *mod_mem; /* At worse, next value is at end of module */ if (within_module_init(addr, mod)) - nextval = (unsigned long)mod->init_layout.base + mod->init_layout.text_size; + mod_mem = &mod->mem[MOD_INIT_TEXT]; else - nextval = (unsigned long)mod->core_layout.base + mod->core_layout.text_size; + mod_mem = &mod->mem[MOD_TEXT]; + + nextval = (unsigned long)mod_mem->base + mod_mem->size; bestval = kallsyms_symbol_value(&kallsyms->symtab[best]); |