Commit 0f0836b7 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching 



Pull livepatching updates from Jiri Kosina:

 - RO/NX attribute fixes for patch module relocations from Josh
   Poimboeuf.  As part of this effort, module.c has been cleaned up as
   well and livepatching is piggy-backing on this cleanup.  Rusty is OK
   with this whole lot going through livepatching tree.

 - symbol disambiguation support from Chris J Arges.  That series is
   also

        Reviewed-by: default avatarMiroslav Benes <mbenes@suse.cz>

   but this came in only after I've alredy pushed out.  Didn't want to
   rebase because of that, hence I am mentioning it here.

 - symbol lookup fix from Miroslav Benes

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching:
  livepatch: Cleanup module page permission changes
  module: keep percpu symbols in module's symtab
  module: clean up RO/NX handling.
  module: use a structure to encapsulate layout.
  gcov: use within_module() helper.
  module: Use the same logic for setting and unsetting RO/NX
  livepatch: function,sympos scheme in livepatch sysfs directory
  livepatch: add sympos as disambiguator field to klp_reloc
  livepatch: add old_sympos as disambiguator field to klp_func
parents c2848f2e b56b36ee

Documentation/ABI/testing/sysfs-kernel-livepatch

+5 −1
Original line number Diff line number Diff line
@@ -33,7 +33,7 @@ Description: 
		The object directory contains subdirectories for each function

		that is patched within the object.



What:		/sys/kernel/livepatch/<patch>/<object>/<function>

What:		/sys/kernel/livepatch/<patch>/<object>/<function,sympos>

Date:		Nov 2014

KernelVersion:	3.19.0

Contact:	live-patching@vger.kernel.org
@@ -41,4 +41,8 @@ Description: 
		The function directory contains attributes regarding the

		properties and state of the patched function.



		The directory name contains the patched function name and a

		sympos number corresponding to the nth occurrence of the symbol

		name in kallsyms for the patched object.



		There are currently no such attributes.

arch/alpha/kernel/module.c

+1 −1
Original line number Diff line number Diff line
@@ -160,7 +160,7 @@ apply_relocate_add(Elf64_Shdr *sechdrs, const char *strtab, 


	/* The small sections were sorted to the end of the segment.

	   The following should definitely cover them.  */

	gp = (u64)me->module_core + me->core_size - 0x8000;

	gp = (u64)me->core_layout.base + me->core_layout.size - 0x8000;

	got = sechdrs[me->arch.gotsecindex].sh_addr;



	for (i = 0; i < n; i++) {

arch/arc/kernel/unwind.c

+2 −2
Original line number Diff line number Diff line
@@ -385,8 +385,8 @@ void *unwind_add_table(struct module *module, const void *table_start, 
		return NULL;



	init_unwind_table(table, module->name,

			  module->module_core, module->core_size,

			  module->module_init, module->init_size,

			  module->core_layout.base, module->core_layout.size,

			  module->init_layout.base, module->init_layout.size,

			  table_start, table_size,

			  NULL, 0);

arch/arm/kernel/module-plts.c

+1 −1
Original line number Diff line number Diff line
@@ -32,7 +32,7 @@ struct plt_entries { 


static bool in_init(const struct module *mod, u32 addr)

{

	return addr - (u32)mod->module_init < mod->init_size;

	return addr - (u32)mod->init_layout.base < mod->init_layout.size;

}



u32 get_module_plt(struct module *mod, unsigned long loc, Elf32_Addr val)

arch/avr32/kernel/module.c

+6 −6
Original line number Diff line number Diff line
@@ -118,9 +118,9 @@ int module_frob_arch_sections(Elf_Ehdr *hdr, Elf_Shdr *sechdrs, 
	 * Increase core size to make room for GOT and set start

	 * offset for GOT.

	 */

	module->core_size = ALIGN(module->core_size, 4);

	module->arch.got_offset = module->core_size;

	module->core_size += module->arch.got_size;

	module->core_layout.size = ALIGN(module->core_layout.size, 4);

	module->arch.got_offset = module->core_layout.size;

	module->core_layout.size += module->arch.got_size;



	return 0;
@@ -177,7 +177,7 @@ int apply_relocate_add(Elf32_Shdr *sechdrs, const char *strtab, 
			if (!info->got_initialized) {

				Elf32_Addr *gotent;



				gotent = (module->module_core

				gotent = (module->core_layout.base

					  + module->arch.got_offset

					  + info->got_offset);

				*gotent = relocation;
@@ -255,8 +255,8 @@ int apply_relocate_add(Elf32_Shdr *sechdrs, const char *strtab, 
			 */

			pr_debug("GOTPC: PC=0x%x, got_offset=0x%lx, core=0x%p\n",

				 relocation, module->arch.got_offset,

				 module->module_core);

			relocation -= ((unsigned long)module->module_core

				 module->core_layout.base);

			relocation -= ((unsigned long)module->core_layout.base

				       + module->arch.got_offset);

			*location = relocation;

			break;

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