mirror of https://gitee.com/openkylin/linux.git
54 lines
1.4 KiB
C
54 lines
1.4 KiB
C
#include <linux/module.h>
|
|
#include <linux/spinlock.h>
|
|
|
|
static LIST_HEAD(dbe_list);
|
|
static DEFINE_SPINLOCK(dbe_lock);
|
|
|
|
/* Given an address, look for it in the module exception tables. */
|
|
const struct exception_table_entry *search_module_dbetables(unsigned long addr)
|
|
{
|
|
unsigned long flags;
|
|
const struct exception_table_entry *e = NULL;
|
|
struct mod_arch_specific *dbe;
|
|
|
|
spin_lock_irqsave(&dbe_lock, flags);
|
|
list_for_each_entry(dbe, &dbe_list, dbe_list) {
|
|
e = search_extable(dbe->dbe_start, dbe->dbe_end - 1, addr);
|
|
if (e)
|
|
break;
|
|
}
|
|
spin_unlock_irqrestore(&dbe_lock, flags);
|
|
|
|
/* Now, if we found one, we are running inside it now, hence
|
|
we cannot unload the module, hence no refcnt needed. */
|
|
return e;
|
|
}
|
|
|
|
/* Put in dbe list if neccessary. */
|
|
int module_finalize(const Elf_Ehdr *hdr,
|
|
const Elf_Shdr *sechdrs,
|
|
struct module *me)
|
|
{
|
|
const Elf_Shdr *s;
|
|
char *secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
|
|
|
|
INIT_LIST_HEAD(&me->arch.dbe_list);
|
|
for (s = sechdrs; s < sechdrs + hdr->e_shnum; s++) {
|
|
if (strcmp("__dbe_table", secstrings + s->sh_name) != 0)
|
|
continue;
|
|
me->arch.dbe_start = (void *)s->sh_addr;
|
|
me->arch.dbe_end = (void *)s->sh_addr + s->sh_size;
|
|
spin_lock_irq(&dbe_lock);
|
|
list_add(&me->arch.dbe_list, &dbe_list);
|
|
spin_unlock_irq(&dbe_lock);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void module_arch_cleanup(struct module *mod)
|
|
{
|
|
spin_lock_irq(&dbe_lock);
|
|
list_del(&mod->arch.dbe_list);
|
|
spin_unlock_irq(&dbe_lock);
|
|
}
|