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authorJeremy Fitzhardinge <jeremy@goop.org>2008-03-17 16:37:12 -0700
committerIngo Molnar <mingo@elte.hu>2008-04-24 23:57:31 +0200
commit90e9f53662826db3cdd6d99bd394d727b05160c1 (patch)
tree5310e489d7fd62185706424a98df354e83e9a1a3
parent9666e9d44b83755c53615fb89c0787b6846786a1 (diff)
downloadlinux-linaro-android-90e9f53662826db3cdd6d99bd394d727b05160c1.tar.gz
xen: make sure iret faults are trapped
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
-rw-r--r--arch/x86/kernel/entry_32.S2
-rw-r--r--arch/x86/xen/xen-asm.S6
2 files changed, 6 insertions, 2 deletions
diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index f0f8934fc30..568c6ccd7ae 100644
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -409,7 +409,7 @@ restore_nocheck_notrace:
irq_return:
INTERRUPT_RETURN
.section .fixup,"ax"
-iret_exc:
+ENTRY(iret_exc)
pushl $0 # no error code
pushl $do_iret_error
jmp error_code
diff --git a/arch/x86/xen/xen-asm.S b/arch/x86/xen/xen-asm.S
index fe161ed4b01..99223cc323b 100644
--- a/arch/x86/xen/xen-asm.S
+++ b/arch/x86/xen/xen-asm.S
@@ -184,8 +184,12 @@ iret_restore_end:
region is OK. */
je xen_hypervisor_callback
- iret
+1: iret
xen_iret_end_crit:
+.section __ex_table,"a"
+ .align 4
+ .long 1b,iret_exc
+.previous
hyper_iret:
/* put this out of line since its very rarely used */