Commit ee158fcd authored by Isaku Yamahata's avatar Isaku Yamahata Committed by Tony Luck
Browse files

ia64/pv_ops/bp/module: support binary patching for kernel module. 



support binary patching for kernel module.

Signed-off-by: default avatarIsaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: default avatarTony Luck <tony.luck@intel.com>
parent 03f511dd

arch/ia64/include/asm/module.h

+6 −0
Original line number Diff line number Diff line
@@ -16,6 +16,12 @@ struct mod_arch_specific { 
	struct elf64_shdr *got;		/* global offset table */

	struct elf64_shdr *opd;		/* official procedure descriptors */

	struct elf64_shdr *unwind;	/* unwind-table section */

#ifdef CONFIG_PARAVIRT

	struct elf64_shdr *paravirt_bundles;

					/* paravirt_alt_bundle_patch table */

	struct elf64_shdr *paravirt_insts;

					/* paravirt_alt_inst_patch table */

#endif

	unsigned long gp;		/* global-pointer for module */



	void *core_unw_table;		/* core unwind-table cookie returned by unwinder */

arch/ia64/kernel/module.c

+32 −0
Original line number Diff line number Diff line
@@ -446,6 +446,14 @@ module_frob_arch_sections (Elf_Ehdr *ehdr, Elf_Shdr *sechdrs, char *secstrings, 
			mod->arch.opd = s;

		else if (strcmp(".IA_64.unwind", secstrings + s->sh_name) == 0)

			mod->arch.unwind = s;

#ifdef CONFIG_PARAVIRT

		else if (strcmp(".paravirt_bundles",

				secstrings + s->sh_name) == 0)

			mod->arch.paravirt_bundles = s;

		else if (strcmp(".paravirt_insts",

				secstrings + s->sh_name) == 0)

			mod->arch.paravirt_insts = s;

#endif



	if (!mod->arch.core_plt || !mod->arch.init_plt || !mod->arch.got || !mod->arch.opd) {

		printk(KERN_ERR "%s: sections missing\n", mod->name);
@@ -921,6 +929,30 @@ module_finalize (const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs, struct module *mo 
	DEBUGP("%s: init: entry=%p\n", __func__, mod->init);

	if (mod->arch.unwind)

		register_unwind_table(mod);

#ifdef CONFIG_PARAVIRT

        if (mod->arch.paravirt_bundles) {

                struct paravirt_patch_site_bundle *start =

                        (struct paravirt_patch_site_bundle *)

                        mod->arch.paravirt_bundles->sh_addr;

                struct paravirt_patch_site_bundle *end =

                        (struct paravirt_patch_site_bundle *)

                        (mod->arch.paravirt_bundles->sh_addr +

                         mod->arch.paravirt_bundles->sh_size);



                paravirt_patch_apply_bundle(start, end);

        }

        if (mod->arch.paravirt_insts) {

                struct paravirt_patch_site_inst *start =

                        (struct paravirt_patch_site_inst *)

                        mod->arch.paravirt_insts->sh_addr;

                struct paravirt_patch_site_inst *end =

                        (struct paravirt_patch_site_inst *)

                        (mod->arch.paravirt_insts->sh_addr +

                         mod->arch.paravirt_insts->sh_size);



                paravirt_patch_apply_inst(start, end);

        }

#endif

	return 0;

}