[PATCH] xen: x86_64: Add macro for debugreg
Add 2 macros to set and get debugreg on x86_64. This is useful for Xen
because it will need only to redefine each macro to a hypervisor call.
Signed-off-by: Vincent Hanquez <vincent.hanquez@cl.cam.ac.uk>
Cc: Ian Pratt <m+Ian.Pratt@cl.cam.ac.uk>
Cc: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/arch/x86_64/kernel/signal.c b/arch/x86_64/kernel/signal.c
index 3c5f308..0446e8b 100644
--- a/arch/x86_64/kernel/signal.c
+++ b/arch/x86_64/kernel/signal.c
@@ -439,7 +439,7 @@
* inside the kernel.
*/
if (current->thread.debugreg7)
- asm volatile("movq %0,%%db7" : : "r" (current->thread.debugreg7));
+ set_debugreg(current->thread.debugreg7, 7);
/* Whee! Actually deliver the signal. */
return handle_signal(signr, &info, &ka, oldset, regs);