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authorVincent Hanquez <vincent.hanquez@cl.cam.ac.uk>2005-06-23 00:08:46 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-23 09:45:14 -0700
commite9129e56e9ec50c0689eb4cf7a3ca132f1e776db (patch)
tree46ef37651b1d25afbe002e00d8c80c85df27d5fd /arch
parent717b594a415bfaf2dbd5e8266636488f2564c689 (diff)
downloadlinux-e9129e56e9ec50c0689eb4cf7a3ca132f1e776db.tar.bz2
[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>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86_64/kernel/signal.c2
-rw-r--r--arch/x86_64/kernel/traps.c4
2 files changed, 3 insertions, 3 deletions
diff --git a/arch/x86_64/kernel/signal.c b/arch/x86_64/kernel/signal.c
index 3c5f30893715..0446e8b96a20 100644
--- a/arch/x86_64/kernel/signal.c
+++ b/arch/x86_64/kernel/signal.c
@@ -439,7 +439,7 @@ int do_signal(struct pt_regs *regs, sigset_t *oldset)
* 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);
diff --git a/arch/x86_64/kernel/traps.c b/arch/x86_64/kernel/traps.c
index 3dfec8fdabcd..21706c1a0f95 100644
--- a/arch/x86_64/kernel/traps.c
+++ b/arch/x86_64/kernel/traps.c
@@ -669,7 +669,7 @@ asmlinkage void do_debug(struct pt_regs * regs, unsigned long error_code)
}
#endif
- asm("movq %%db6,%0" : "=r" (condition));
+ get_debugreg(condition, 6);
if (notify_die(DIE_DEBUG, "debug", regs, condition, error_code,
SIGTRAP) == NOTIFY_STOP)
@@ -721,7 +721,7 @@ asmlinkage void do_debug(struct pt_regs * regs, unsigned long error_code)
info.si_addr = (void __user *)regs->rip;
force_sig_info(SIGTRAP, &info, tsk);
clear_dr7:
- asm volatile("movq %0,%%db7"::"r"(0UL));
+ set_debugreg(0UL, 7);
return;
clear_TF_reenable: