Ard Biesheuvel b34006c425 x86/jump_table: Use relative references ...

Similar to the arm64 case, 64-bit x86 can benefit from using relative
references rather than absolute ones when emitting struct jump_entry
instances. Not only does this reduce the memory footprint of the entries
themselves by 33%, it also removes the need for carrying relocation
metadata on relocatable builds (i.e., for KASLR) which saves a fair
chunk of .init space as well (although the savings are not as dramatic
as on arm64)

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-s390@vger.kernel.org
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Jessica Yu <jeyu@kernel.org>
Link: https://lkml.kernel.org/r/20180919065144.25010-7-ard.biesheuvel@linaro.org

2018-09-27 17:56:48 +02:00

..

arch/x86

x86/unwind/orc: Detect the end of the stack

2018-06-21 16:34:56 +02:00

Documentation

x86/asm: Fix inline asm call constraints for Clang

2017-09-23 15:06:20 +02:00

.gitignore

objtool: Move synced files to their original relative locations

2017-11-07 10:48:23 +01:00

arch.h

objtool: Assume unannotated UD2 instructions are dead ends

2017-07-28 08:33:32 +02:00

Build

objtool: Add ORC unwind table generation

2017-07-18 10:57:43 +02:00

builtin-check.c

objtool: Add module specific retpoline rules

2018-02-21 09:05:05 +01:00

builtin-orc.c

objtool: Use existing global variables for options

2018-02-21 09:05:04 +01:00

builtin.h

objtool: Add module specific retpoline rules

2018-02-21 09:05:05 +01:00

cfi.h

objtool: Handle GCC stack pointer adjustment bug

2017-08-30 10:48:41 +02:00

check.c

Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2018-08-13 13:35:26 -07:00

check.h

x86/unwind/orc: Detect the end of the stack

2018-06-21 16:34:56 +02:00

elf.c

objtool: Use '.strtab' if '.shstrtab' doesn't exist, to support ORC tables on Clang

2018-07-14 14:59:42 +02:00

elf.h

objtool: Support GCC 8's cold subfunctions

2018-05-14 10:20:53 +02:00

Makefile

kbuild: Rename HOSTLDFLAGS to KBUILD_HOSTLDFLAGS

2018-07-18 01:18:05 +09:00

objtool.c

objtool: Print top level commands on incorrect usage

2017-10-18 15:22:26 +02:00

orc_dump.c

x86/unwind/orc: Detect the end of the stack

2018-06-21 16:34:56 +02:00

orc_gen.c

x86/unwind/orc: Detect the end of the stack

2018-06-21 16:34:56 +02:00

orc.h

objtool: Move synced files to their original relative locations

2017-11-07 10:48:23 +01:00

special.c

x86/jump_table: Use relative references

2018-09-27 17:56:48 +02:00

special.h

…

sync-check.sh

objtool: Move kernel headers/code sync check to a script

2017-11-07 10:48:34 +01:00

warn.h

objtool: Implement stack validation 2.0

2017-06-30 10:19:19 +02:00