diff options
| author | Masahiro Yamada <masahiroy@kernel.org> | 2019-12-03 14:20:49 +0900 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2019-12-08 19:10:12 +0800 |
| commit | 0d915a9aa4e1f9060dac2c32616a69b391292b84 (patch) | |
| tree | 9c9ef74e1d3c6219b85dab212825d80b9bffa464 /arch | |
| parent | d79ae6aa3087a6434b5ecdb51d20dca20c8e1596 (diff) | |
x86: use data32 directive instead of macro for operand-size prefix
This file defines 'a32' and 'o32' macros to avoid magic numbers
of operand/address-size prefixing.
GAS supports 'data32' and 'addr32' for that purpose.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/cpu/start16.S | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/arch/x86/cpu/start16.S b/arch/x86/cpu/start16.S index 474efe4df5..bcabd76741 100644 --- a/arch/x86/cpu/start16.S +++ b/arch/x86/cpu/start16.S @@ -13,8 +13,6 @@ #include <asm/processor-flags.h> #define BOOT_SEG 0xffff0000 /* linear segment of boot code */ -#define a32 .byte 0x67; -#define o32 .byte 0x66; .section .start16, "ax" .code16 @@ -33,8 +31,8 @@ start16: wbinvd /* load the temporary Global Descriptor Table */ -o32 cs lidt idt_ptr -o32 cs lgdt gdt_ptr +data32 cs lidt idt_ptr +data32 cs lgdt gdt_ptr /* Now, we enter protected mode */ movl %cr0, %eax @@ -49,7 +47,7 @@ ff: movw $code32start, %ax movw %ax, %bp movl %ecx, %eax -o32 cs ljmp *(%bp) +data32 cs ljmp *(%bp) /* 48-bit far pointer */ code32start: |