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| author | H. Peter Anvin <hpa@zytor.com> | 2009-05-06 17:56:51 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2009-05-08 17:19:01 -0700 |
| commit | 97541912785369925723b6255438ad9fce2ddf04 (patch) | |
| tree | 5c9e5cce0f174877046997fad05253d55b1d8532 /arch/x86/boot | |
| parent | 0a137736704ef9af719409933b3c33e138461786 (diff) | |
| download | lwn-97541912785369925723b6255438ad9fce2ddf04.tar.gz lwn-97541912785369925723b6255438ad9fce2ddf04.zip | |
x86, boot: zero EFLAGS on 32 bits
The 64-bit code already clears EFLAGS as soon as it has a stack. This
seems like a reasonable precaution, so do it on 32 bits as well.
[ Impact: extra paranoia ]
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/boot')
| -rw-r--r-- | arch/x86/boot/compressed/head_32.S | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/boot/compressed/head_32.S b/arch/x86/boot/compressed/head_32.S index d7245cf80261..d02a4f02be13 100644 --- a/arch/x86/boot/compressed/head_32.S +++ b/arch/x86/boot/compressed/head_32.S @@ -91,6 +91,10 @@ ENTRY(startup_32) /* Set up the stack */ leal boot_stack_end(%ebx), %esp + /* Zero EFLAGS */ + pushl $0 + popfl + /* * Copy the compressed kernel to the end of our buffer * where decompression in place becomes safe. |