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authorJeremy Fitzhardinge <jeremy@goop.org>2008-07-08 15:07:00 -0700
committerIngo Molnar <mingo@elte.hu>2008-07-16 11:02:31 +0200
commit997409d3d0bd6894f33e31ced251c0fdf523aa14 (patch)
treecc4a963310cc9ae00138607cdaa35c99e7d5f76c /arch/x86/xen/xen-asm_64.S
parente176d367d0cc8b8efd2e0960c9edf5d2fe7cd9f1 (diff)
downloadop-kernel-dev-997409d3d0bd6894f33e31ced251c0fdf523aa14.zip
op-kernel-dev-997409d3d0bd6894f33e31ced251c0fdf523aa14.tar.gz
xen64: deal with extra words Xen pushes onto exception frames
Xen pushes two extra words containing the values of rcx and r11. This pvop hook copies the words back into their appropriate registers, and cleans them off the stack. This leaves the stack in native form, so the normal handler can run unchanged. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: Stephen Tweedie <sct@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/xen/xen-asm_64.S')
-rw-r--r--arch/x86/xen/xen-asm_64.S5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/xen/xen-asm_64.S b/arch/x86/xen/xen-asm_64.S
index 4ec1082..b147b49 100644
--- a/arch/x86/xen/xen-asm_64.S
+++ b/arch/x86/xen/xen-asm_64.S
@@ -133,6 +133,11 @@ check_events:
ret
#endif
+ENTRY(xen_adjust_exception_frame)
+ mov 8+0(%rsp),%rcx
+ mov 8+8(%rsp),%r11
+ ret $16
+
ENTRY(xen_iret)
pushq $0
jmp hypercall_page + __HYPERVISOR_iret * 32
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