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| author | Lans Zhang <lans.zhang2008@gmail.com> | 2013-03-01 09:20:39 +0800 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2013-03-01 10:18:33 -0800 |
| commit | 2dead15fb8f6522b96c913603b5ad0b5c7d01f49 (patch) | |
| tree | eaefab90bf50b16bf8c6a62d7168d48c7a9a3130 | |
| parent | de1a2262b006220dae2561a299a6ea128c46f4fe (diff) | |
| download | linux-3.10-2dead15fb8f6522b96c913603b5ad0b5c7d01f49.tar.gz linux-3.10-2dead15fb8f6522b96c913603b5ad0b5c7d01f49.tar.bz2 linux-3.10-2dead15fb8f6522b96c913603b5ad0b5c7d01f49.zip | |
x86_64: Use __BOOT_DS instead_of __KERNEL_DS for safety
In startup_32, the running code still uses the initial GDT
located in setup. Thus, __BOOT_DS is preferred. Currently
__KERNEL_DS is lucky to equal to __BOOT_DS, but this is
not always a safe way.
Signed-off-by: Lans Zhang <lans.zhang2008@gmail.com>
Link: http://lkml.kernel.org/r/51300267.6000008@gmail.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| -rw-r--r-- | arch/x86/boot/compressed/head_64.S | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/boot/compressed/head_64.S b/arch/x86/boot/compressed/head_64.S index c1d383d1fb7..16f24e6dad7 100644 --- a/arch/x86/boot/compressed/head_64.S +++ b/arch/x86/boot/compressed/head_64.S @@ -52,7 +52,7 @@ ENTRY(startup_32) jnz 1f cli - movl $(__KERNEL_DS), %eax + movl $(__BOOT_DS), %eax movl %eax, %ds movl %eax, %es movl %eax, %ss |