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module: kallsyms functions take struct load_info

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Simple refactor causes us to lift struct definition to top of file.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2010-08-05 12:59:07 -06:00
parent d6df72a06e
commit eded41c1c6
1 changed files with 29 additions and 39 deletions
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64
kernel/module.c
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@ -110,6 +110,16 @@ int unregister_module_notifier(struct notifier_block * nb)
} }
EXPORT_SYMBOL(unregister_module_notifier); EXPORT_SYMBOL(unregister_module_notifier);
struct load_info {
Elf_Ehdr *hdr;
unsigned long len;
Elf_Shdr *sechdrs;
char *secstrings, *args, *strtab;
struct {
unsigned int sym, str, mod, vers, info, pcpu;
} index;
};
/* We require a truly strong try_module_get(): 0 means failure due to /* We require a truly strong try_module_get(): 0 means failure due to
ongoing or failed initialization etc. */ ongoing or failed initialization etc. */
static inline int strong_try_module_get(struct module *mod) static inline int strong_try_module_get(struct module *mod)
@ -1909,11 +1919,10 @@ static int is_exported(const char *name, unsigned long value,
} }
/* As per nm */ /* As per nm */
static char elf_type(const Elf_Sym *sym, static char elf_type(const Elf_Sym *sym, const struct load_info *info)
Elf_Shdr *sechdrs,
const char *secstrings,
struct module *mod)
{ {
const Elf_Shdr *sechdrs = info->sechdrs;
if (ELF_ST_BIND(sym->st_info) == STB_WEAK) { if (ELF_ST_BIND(sym->st_info) == STB_WEAK) {
if (ELF_ST_TYPE(sym->st_info) == STT_OBJECT) if (ELF_ST_TYPE(sym->st_info) == STT_OBJECT)
return 'v'; return 'v';
@ -1943,8 +1952,10 @@ static char elf_type(const Elf_Sym *sym,
else else
return 'b'; return 'b';
} }
if (strstarts(secstrings + sechdrs[sym->st_shndx].sh_name, ".debug")) if (strstarts(info->secstrings + sechdrs[sym->st_shndx].sh_name,
".debug")) {
return 'n'; return 'n';
}
return '?'; return '?';
} }
@ -2021,35 +2032,30 @@ static unsigned long layout_symtab(struct module *mod,
return symoffs; return symoffs;
} }
static void add_kallsyms(struct module *mod, static void add_kallsyms(struct module *mod, struct load_info *info,
Elf_Shdr *sechdrs,
unsigned int shnum,
unsigned int symindex,
unsigned int strindex,
unsigned long symoffs, unsigned long symoffs,
unsigned long stroffs, unsigned long stroffs,
const char *secstrings,
unsigned long *strmap) unsigned long *strmap)
{ {
unsigned int i, ndst; unsigned int i, ndst;
const Elf_Sym *src; const Elf_Sym *src;
Elf_Sym *dst; Elf_Sym *dst;
char *s; char *s;
Elf_Shdr *symsec = &info->sechdrs[info->index.sym];
mod->symtab = (void *)sechdrs[symindex].sh_addr; mod->symtab = (void *)symsec->sh_addr;
mod->num_symtab = sechdrs[symindex].sh_size / sizeof(Elf_Sym); mod->num_symtab = symsec->sh_size / sizeof(Elf_Sym);
mod->strtab = (void *)sechdrs[strindex].sh_addr; mod->strtab = info->strtab;
/* Set types up while we still have access to sections. */ /* Set types up while we still have access to sections. */
for (i = 0; i < mod->num_symtab; i++) for (i = 0; i < mod->num_symtab; i++)
mod->symtab[i].st_info mod->symtab[i].st_info = elf_type(&mod->symtab[i], info);
= elf_type(&mod->symtab[i], sechdrs, secstrings, mod);
mod->core_symtab = dst = mod->module_core + symoffs; mod->core_symtab = dst = mod->module_core + symoffs;
src = mod->symtab; src = mod->symtab;
*dst = *src; *dst = *src;
for (ndst = i = 1; i < mod->num_symtab; ++i, ++src) { for (ndst = i = 1; i < mod->num_symtab; ++i, ++src) {
if (!is_core_symbol(src, sechdrs, shnum)) if (!is_core_symbol(src, info->sechdrs, info->hdr->e_shnum))
continue; continue;
dst[ndst] = *src; dst[ndst] = *src;
dst[ndst].st_name = bitmap_weight(strmap, dst[ndst].st_name); dst[ndst].st_name = bitmap_weight(strmap, dst[ndst].st_name);
@ -2058,7 +2064,7 @@ static void add_kallsyms(struct module *mod,
mod->core_num_syms = ndst; mod->core_num_syms = ndst;
mod->core_strtab = s = mod->module_core + stroffs; mod->core_strtab = s = mod->module_core + stroffs;
for (*s = 0, i = 1; i < sechdrs[strindex].sh_size; ++i) for (*s = 0, i = 1; i < info->sechdrs[info->index.str].sh_size; ++i)
if (test_bit(i, strmap)) if (test_bit(i, strmap))
*++s = mod->strtab[i]; *++s = mod->strtab[i];
} }
@ -2075,15 +2081,10 @@ static inline unsigned long layout_symtab(struct module *mod,
return 0; return 0;
} }
static inline void add_kallsyms(struct module *mod, static void add_kallsyms(struct module *mod, struct load_info *info,
Elf_Shdr *sechdrs,
unsigned int shnum,
unsigned int symindex,
unsigned int strindex,
unsigned long symoffs, unsigned long symoffs,
unsigned long stroffs, unsigned long stroffs,
const char *secstrings, unsigned long *strmap)
const unsigned long *strmap)
{ {
} }
#endif /* CONFIG_KALLSYMS */ #endif /* CONFIG_KALLSYMS */
@ -2148,16 +2149,6 @@ static inline void kmemleak_load_module(struct module *mod, Elf_Ehdr *hdr,
} }
#endif #endif
struct load_info {
Elf_Ehdr *hdr;
unsigned long len;
Elf_Shdr *sechdrs;
char *secstrings, *args, *strtab;
struct {
unsigned int sym, str, mod, vers, info, pcpu;
} index;
};
/* Sets info->hdr and info->len. */ /* Sets info->hdr and info->len. */
static int copy_and_check(struct load_info *info, const void __user *umod, unsigned long len) static int copy_and_check(struct load_info *info, const void __user *umod, unsigned long len)
{ {
@ -2623,8 +2614,7 @@ static noinline struct module *load_module(void __user *umod,
percpu_modcopy(mod, (void *)info.sechdrs[info.index.pcpu].sh_addr, percpu_modcopy(mod, (void *)info.sechdrs[info.index.pcpu].sh_addr,
info.sechdrs[info.index.pcpu].sh_size); info.sechdrs[info.index.pcpu].sh_size);
add_kallsyms(mod, info.sechdrs, info.hdr->e_shnum, info.index.sym, info.index.str, add_kallsyms(mod, &info, symoffs, stroffs, strmap);
symoffs, stroffs, info.secstrings, strmap);
kfree(strmap); kfree(strmap);
strmap = NULL; strmap = NULL;