Seth/kernel_amazon_mt8127-common
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Merge tag 'v3.10.101' into update

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This is the 3.10.101 stable release
This commit is contained in:
Stricted
2018-03-21 22:52:41 +01:00
parent 93481ad93e 326a1b2d50
commit 9aae3dad3d
26 changed files with 552 additions and 214 deletions
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kernel/module.c
+68 -41
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@@ -179,6 +179,9 @@ struct load_info {
struct _ddebug *debug;
unsigned int num_debug;
bool sig_ok;
#ifdef CONFIG_KALLSYMS
unsigned long mod_kallsyms_init_off;
#endif
struct {
unsigned int sym, str, mod, vers, info, pcpu;
} index;
@@ -2346,8 +2349,20 @@ static void layout_symtab(struct module *mod, struct load_info *info)
strsect->sh_entsize = get_offset(mod, &mod->init_size, strsect,
info->index.str) | INIT_OFFSET_MASK;
pr_debug("\t%s\n", info->secstrings + strsect->sh_name);
/* We'll tack temporary mod_kallsyms on the end. */
mod->init_size = ALIGN(mod->init_size,
__alignof__(struct mod_kallsyms));
info->mod_kallsyms_init_off = mod->init_size;
mod->init_size += sizeof(struct mod_kallsyms);
mod->init_size = debug_align(mod->init_size);
}
/*
* We use the full symtab and strtab which layout_symtab arranged to
* be appended to the init section. Later we switch to the cut-down
* core-only ones.
*/
static void add_kallsyms(struct module *mod, const struct load_info *info)
{
unsigned int i, ndst;
@@ -2356,28 +2371,33 @@ static void add_kallsyms(struct module *mod, const struct load_info *info)
char *s;
Elf_Shdr *symsec = &info->sechdrs[info->index.sym];
mod->symtab = (void *)symsec->sh_addr;
mod->num_symtab = symsec->sh_size / sizeof(Elf_Sym);
/* Set up to point into init section. */
mod->kallsyms = mod->module_init + info->mod_kallsyms_init_off;
mod->kallsyms->symtab = (void *)symsec->sh_addr;
mod->kallsyms->num_symtab = symsec->sh_size / sizeof(Elf_Sym);
/* Make sure we get permanent strtab: don't use info->strtab. */
mod->strtab = (void *)info->sechdrs[info->index.str].sh_addr;
mod->kallsyms->strtab = (void *)info->sechdrs[info->index.str].sh_addr;
/* Set types up while we still have access to sections. */
for (i = 0; i < mod->num_symtab; i++)
mod->symtab[i].st_info = elf_type(&mod->symtab[i], info);
for (i = 0; i < mod->kallsyms->num_symtab; i++)
mod->kallsyms->symtab[i].st_info
= elf_type(&mod->kallsyms->symtab[i], info);
mod->core_symtab = dst = mod->module_core + info->symoffs;
mod->core_strtab = s = mod->module_core + info->stroffs;
src = mod->symtab;
for (ndst = i = 0; i < mod->num_symtab; i++) {
/* Now populate the cut down core kallsyms for after init. */
mod->core_kallsyms.symtab = dst = mod->module_core + info->symoffs;
mod->core_kallsyms.strtab = s = mod->module_core + info->stroffs;
src = mod->kallsyms->symtab;
for (ndst = i = 0; i < mod->kallsyms->num_symtab; i++) {
if (i == 0 ||
is_core_symbol(src+i, info->sechdrs, info->hdr->e_shnum)) {
dst[ndst] = src[i];
dst[ndst++].st_name = s - mod->core_strtab;
s += strlcpy(s, &mod->strtab[src[i].st_name],
dst[ndst++].st_name = s - mod->core_kallsyms.strtab;
s += strlcpy(s, &mod->kallsyms->strtab[src[i].st_name],
KSYM_NAME_LEN) + 1;
}
}
mod->core_num_syms = ndst;
mod->core_kallsyms.num_symtab = ndst;
}
#else
static inline void layout_symtab(struct module *mod, struct load_info *info)
@@ -3117,9 +3137,8 @@ static int do_init_module(struct module *mod)
module_put(mod);
trim_init_extable(mod);
#ifdef CONFIG_KALLSYMS
mod->num_symtab = mod->core_num_syms;
mod->symtab = mod->core_symtab;
mod->strtab = mod->core_strtab;
/* Switch to core kallsyms now init is done: kallsyms may be walking! */
rcu_assign_pointer(mod->kallsyms, &mod->core_kallsyms);
#endif
unset_module_init_ro_nx(mod);
module_free(mod, mod->module_init);
@@ -3398,9 +3417,9 @@ static inline int is_arm_mapping_symbol(const char *str)
&& (str[2] == '\0' || str[2] == '.');
}
static const char *symname(struct module *mod, unsigned int symnum)
static const char *symname(struct mod_kallsyms *kallsyms, unsigned int symnum)
{
return mod->strtab + mod->symtab[symnum].st_name;
return kallsyms->strtab + kallsyms->symtab[symnum].st_name;
}
static const char *get_ksymbol(struct module *mod,
@@ -3410,6 +3429,7 @@ static const char *get_ksymbol(struct module *mod,
{
unsigned int i, best = 0;
unsigned long nextval;
struct mod_kallsyms *kallsyms = rcu_dereference_sched(mod->kallsyms);
/* At worse, next value is at end of module */
if (within_module_init(addr, mod))
@@ -3419,32 +3439,32 @@ static const char *get_ksymbol(struct module *mod,
/* Scan for closest preceding symbol, and next symbol. (ELF
starts real symbols at 1). */
for (i = 1; i < mod->num_symtab; i++) {
if (mod->symtab[i].st_shndx == SHN_UNDEF)
for (i = 1; i < kallsyms->num_symtab; i++) {
if (kallsyms->symtab[i].st_shndx == SHN_UNDEF)
continue;
/* We ignore unnamed symbols: they're uninformative
* and inserted at a whim. */
if (*symname(mod, i) == '\0'
|| is_arm_mapping_symbol(symname(mod, i)))
if (*symname(kallsyms, i) == '\0'
|| is_arm_mapping_symbol(symname(kallsyms, i)))
continue;
if (mod->symtab[i].st_value <= addr
&& mod->symtab[i].st_value > mod->symtab[best].st_value)
if (kallsyms->symtab[i].st_value <= addr
&& kallsyms->symtab[i].st_value > kallsyms->symtab[best].st_value)
best = i;
if (mod->symtab[i].st_value > addr
&& mod->symtab[i].st_value < nextval)
nextval = mod->symtab[i].st_value;
if (kallsyms->symtab[i].st_value > addr
&& kallsyms->symtab[i].st_value < nextval)
nextval = kallsyms->symtab[i].st_value;
}
if (!best)
return NULL;
if (size)
*size = nextval - mod->symtab[best].st_value;
*size = nextval - kallsyms->symtab[best].st_value;
if (offset)
*offset = addr - mod->symtab[best].st_value;
return symname(mod, best);
*offset = addr - kallsyms->symtab[best].st_value;
return symname(kallsyms, best);
}
/* For kallsyms to ask for address resolution. NULL means not found. Careful
@@ -3540,18 +3560,21 @@ int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
preempt_disable();
list_for_each_entry_rcu(mod, &modules, list) {
struct mod_kallsyms *kallsyms;
if (mod->state == MODULE_STATE_UNFORMED)
continue;
if (symnum < mod->num_symtab) {
*value = mod->symtab[symnum].st_value;
*type = mod->symtab[symnum].st_info;
strlcpy(name, symname(mod, symnum), KSYM_NAME_LEN);
kallsyms = rcu_dereference_sched(mod->kallsyms);
if (symnum < kallsyms->num_symtab) {
*value = kallsyms->symtab[symnum].st_value;
*type = kallsyms->symtab[symnum].st_info;
strlcpy(name, symname(kallsyms, symnum), KSYM_NAME_LEN);
strlcpy(module_name, mod->name, MODULE_NAME_LEN);
*exported = is_exported(name, *value, mod);
preempt_enable();
return 0;
}
symnum -= mod->num_symtab;
symnum -= kallsyms->num_symtab;
}
preempt_enable();
return -ERANGE;
@@ -3560,11 +3583,12 @@ int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
static unsigned long mod_find_symname(struct module *mod, const char *name)
{
unsigned int i;
struct mod_kallsyms *kallsyms = rcu_dereference_sched(mod->kallsyms);
for (i = 0; i < mod->num_symtab; i++)
if (strcmp(name, symname(mod, i)) == 0 &&
mod->symtab[i].st_info != 'U')
return mod->symtab[i].st_value;
for (i = 0; i < kallsyms->num_symtab; i++)
if (strcmp(name, symname(kallsyms, i)) == 0 &&
kallsyms->symtab[i].st_info != 'U')
return kallsyms->symtab[i].st_value;
return 0;
}
@@ -3603,11 +3627,14 @@ int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
int ret;
list_for_each_entry(mod, &modules, list) {
/* We hold module_mutex: no need for rcu_dereference_sched */
struct mod_kallsyms *kallsyms = mod->kallsyms;
if (mod->state == MODULE_STATE_UNFORMED)
continue;
for (i = 0; i < mod->num_symtab; i++) {
ret = fn(data, symname(mod, i),
mod, mod->symtab[i].st_value);
for (i = 0; i < kallsyms->num_symtab; i++) {
ret = fn(data, symname(kallsyms, i),
mod, kallsyms->symtab[i].st_value);
if (ret != 0)
return ret;
}