diff options
| author | Masahiro Yamada | 2019-12-03 14:28:58 +0900 |
|---|---|---|
| committer | Bin Meng | 2019-12-08 19:10:21 +0800 |
| commit | 90ab311a7c1ee91201c23726871d20b2287a51a5 (patch) | |
| tree | f35ad6e8999c51ff9369843db699287a3f383a78 | |
| parent | 0d915a9aa4e1f9060dac2c32616a69b391292b84 (diff) | |
x86: simplify ljmp to 32-bit code
You can directly specify the label as the operand for ljmp.
This commit saves 4-byte code.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
[bmeng: fixed the gas warning]
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
| -rw-r--r-- | arch/x86/cpu/start16.S | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/arch/x86/cpu/start16.S b/arch/x86/cpu/start16.S index bcabd76741e..54f4ff6662a 100644 --- a/arch/x86/cpu/start16.S +++ b/arch/x86/cpu/start16.S @@ -44,10 +44,8 @@ data32 cs lgdt gdt_ptr ff: /* Finally restore BIST and jump to the 32-bit initialization code */ - movw $code32start, %ax - movw %ax, %bp movl %ecx, %eax -data32 cs ljmp *(%bp) +data32 cs ljmp *code32start /* 48-bit far pointer */ code32start: |