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

support binary patching for kernel module.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Isaku Yamahata 2009-03-04 21:06:53 +09:00 committed by Tony Luck
parent 03f511dd02
commit ee158fcd09
2 changed files with 38 additions and 0 deletions
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6
arch/ia64/include/asm/module.h
View File

@ -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 */

32
arch/ia64/kernel/module.c
View File

@ -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;
}