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