diff options
| author | Wang Nan <wangnan0@huawei.com> | 2015-02-10 09:34:05 +0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-02-18 21:50:12 +0100 |
| commit | b7e37567d080301d38a302bb93ba79d1ca446dca (patch) | |
| tree | 88fa4b505c504dcd75a80c4ed24df03804329c2c /kernel | |
| parent | 5154d4f2adfdabe5aeb247e5b2b6b10fae5f6d50 (diff) | |
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>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions