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>
diff --git a/arch/x86/boot/compressed/head_32.S b/arch/x86/boot/compressed/head_32.S
index d7245cf..d02a4f0 100644
--- a/arch/x86/boot/compressed/head_32.S
+++ b/arch/x86/boot/compressed/head_32.S
@@ -91,6 +91,10 @@
/* 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.