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Commit 84f4fc52 authored by H. Peter Anvin's avatar H. Peter Anvin Committed by H. Peter Anvin
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x86: Add symbolic constant for exceptions with error code 



Add a symbolic constant for the bitmask which states which exceptions
carry an error code.

Signed-off-by: default avatarH. Peter Anvin <hpa@zytor.com>
Link: http://lkml.kernel.org/r/1334794610-5546-3-git-send-email-hpa@zytor.com
parent 46326013

arch/x86/include/asm/segment.h

+2 −0
Original line number Diff line number Diff line
@@ -205,6 +205,8 @@ 


#define IDT_ENTRIES 256

#define NUM_EXCEPTION_VECTORS 32

/* Bitmask of exception vectors which push an error code on the stack */

#define EXCEPTION_ERRCODE_MASK  0x00027d00

#define GDT_SIZE (GDT_ENTRIES * 8)

#define GDT_ENTRY_TLS_ENTRIES 3

#define TLS_SIZE (GDT_ENTRY_TLS_ENTRIES * 8)

arch/x86/kernel/head_64.S

+1 −1
Original line number Diff line number Diff line
@@ -295,7 +295,7 @@ ENTRY(early_idt_handler) 
	ja 0f

	movl $1,%eax

	salq %cl,%rax

	testl $0x27d00,%eax

	testl $EXCEPTION_ERRCODE_MASK,%eax

	je 0f

	popq %r8		# get error code

0:	movq 0(%rsp),%rcx	# get ip