1 files changed, 53 insertions, 0 deletions

diff --git a/arch/mips/kernel/module.c b/arch/mips/kernel/module.c
new file mode 100644
index 000000000000..458af3c7a639
--- /dev/null
+++ b/arch/mips/kernel/module.c
@@ -0,0 +1,53 @@
+#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);
+}