From 84f4fc524eed040660bd4ebc8cba259d8afe8461 Mon Sep 17 00:00:00 2001 From: "H. Peter Anvin" Date: Wed, 18 Apr 2012 17:16:47 -0700 Subject: [PATCH] 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: H. Peter Anvin Link: http://lkml.kernel.org/r/1334794610-5546-3-git-send-email-hpa@zytor.com --- arch/x86/include/asm/segment.h | 2 ++ arch/x86/kernel/head_64.S | 2 +- 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/x86/include/asm/segment.h b/arch/x86/include/asm/segment.h index 165466233ab0..58c1e6cd91b6 100644 --- a/arch/x86/include/asm/segment.h +++ b/arch/x86/include/asm/segment.h @@ -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) diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S index 40f4eb3766d1..adf52e85d551 100644 --- a/arch/x86/kernel/head_64.S +++ b/arch/x86/kernel/head_64.S @@ -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 -- 2.39.5