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#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);
}
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