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b7e37567d0
linux/arch
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Wang Nan b7e37567d0 kprobes/x86: Mark 2 bytes NOP as boostable 
Currently, x86 kprobes is unable to boost 2 bytes nop like:

  nopl 0x0(%rax,%rax,1)

which is 0x0f 0x1f 0x44 0x00 0x00.

Such nops have exactly 5 bytes to hold a relative jmp
instruction. Boosting them should be obviously safe.

This patch enable boosting such nops by simply updating
twobyte_is_boostable[] array.

Signed-off-by: Wang Nan <wangnan0@huawei.com>
Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: <lizefan@huawei.com>
Link: http://lkml.kernel.org/r/1423532045-41049-1-git-send-email-wangnan0@huawei.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-02-18 21:50:12 +01:00
..
alpha vm: add VM_FAULT_SIGSEGV handling support 2015-01-29 10:51:32 -08:00
arc arc: mm: Fix build failure 2015-01-30 10:31:14 -08:00
arm Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-02-09 14:28:42 -08:00
arm64 Merge branch 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-02-09 17:53:53 -08:00
avr32 vm: add VM_FAULT_SIGSEGV handling support 2015-01-29 10:51:32 -08:00
blackfin
c6x
cris vm: add VM_FAULT_SIGSEGV handling support 2015-01-29 10:51:32 -08:00
frv vm: add VM_FAULT_SIGSEGV handling support 2015-01-29 10:51:32 -08:00
hexagon
ia64 vm: add VM_FAULT_SIGSEGV handling support 2015-01-29 10:51:32 -08:00
m32r vm: add VM_FAULT_SIGSEGV handling support 2015-01-29 10:51:32 -08:00
m68k vm: add VM_FAULT_SIGSEGV handling support 2015-01-29 10:51:32 -08:00
metag vm: add VM_FAULT_SIGSEGV handling support 2015-01-29 10:51:32 -08:00
microblaze vm: add VM_FAULT_SIGSEGV handling support 2015-01-29 10:51:32 -08:00
mips Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-02-09 14:28:42 -08:00
mn10300 mm/debug_pagealloc: fix build failure on ppc and some other archs 2015-02-05 13:35:30 -08:00
nios2 nios2: fix unhandled signals 2015-02-09 09:47:05 +08:00
openrisc vm: add VM_FAULT_SIGSEGV handling support 2015-01-29 10:51:32 -08:00
parisc vm: add VM_FAULT_SIGSEGV handling support 2015-01-29 10:51:32 -08:00
powerpc Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-02-09 14:28:42 -08:00
s390 Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-02-09 14:28:42 -08:00
score vm: add VM_FAULT_SIGSEGV handling support 2015-01-29 10:51:32 -08:00
sh vm: add VM_FAULT_SIGSEGV handling support 2015-01-29 10:51:32 -08:00
sparc mm/debug_pagealloc: fix build failure on ppc and some other archs 2015-02-05 13:35:30 -08:00
tile Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-02-09 14:28:42 -08:00
um vm: add VM_FAULT_SIGSEGV handling support 2015-01-29 10:51:32 -08:00
unicore32
x86 kprobes/x86: Mark 2 bytes NOP as boostable 2015-02-18 21:50:12 +01:00
xtensa vm: add VM_FAULT_SIGSEGV handling support 2015-01-29 10:51:32 -08:00
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