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[PATCH] xen: x86: Use new macro for debugreg

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Make use of the 2 new macro set_debugreg and get_debugreg.

Signed-off-by: Vincent Hanquez <vincent.hanquez@cl.cam.ac.uk>
Cc: Ian Pratt <m+Ian.Pratt@cl.cam.ac.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Vincent Hanquez 2005-06-23 00:08:43 -07:00 committed by Linus Torvalds
parent f5012310e3
commit 1cc6f12e03
5 changed files with 17 additions and 19 deletions
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2
arch/i386/kernel/cpu/common.c
View File

@ -635,7 +635,7 @@ void __init cpu_init (void)
/* Clear all 6 debug registers: */
#define CD(register) __asm__("movl %0,%%db" #register ::"r"(0) );
#define CD(register) set_debugreg(0, register)
CD(0); CD(1); CD(2); CD(3); /* no db4 and db5 */; CD(6); CD(7);

12
arch/i386/kernel/process.c
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@ -633,13 +633,13 @@ struct task_struct fastcall * __switch_to(struct task_struct *prev_p, struct tas
* Now maybe reload the debug registers
*/
if (unlikely(next->debugreg[7])) {
loaddebug(next, 0);
loaddebug(next, 1);
loaddebug(next, 2);
loaddebug(next, 3);
set_debugreg(current->thread.debugreg[0], 0);
set_debugreg(current->thread.debugreg[1], 1);
set_debugreg(current->thread.debugreg[2], 2);
set_debugreg(current->thread.debugreg[3], 3);
/* no 4 and 5 */
loaddebug(next, 6);
loaddebug(next, 7);
set_debugreg(current->thread.debugreg[6], 6);
set_debugreg(current->thread.debugreg[7], 7);
}
if (unlikely(prev->io_bitmap_ptr || next->io_bitmap_ptr))

2
arch/i386/kernel/signal.c
View File

@ -624,7 +624,7 @@ int fastcall do_signal(struct pt_regs *regs, sigset_t *oldset)
* inside the kernel.
*/
if (unlikely(current->thread.debugreg[7])) {
loaddebug(&current->thread, 7);
set_debugreg(current->thread.debugreg[7], 7);
}
/* Whee! Actually deliver the signal. */

6
arch/i386/kernel/traps.c
View File

@ -685,7 +685,7 @@ fastcall void do_debug(struct pt_regs * regs, long error_code)
unsigned int condition;
struct task_struct *tsk = current;
__asm__ __volatile__("movl %%db6,%0" : "=r" (condition));
get_debugreg(condition, 6);
if (notify_die(DIE_DEBUG, "debug", regs, condition, error_code,
SIGTRAP) == NOTIFY_STOP)
@ -727,9 +727,7 @@ fastcall void do_debug(struct pt_regs * regs, long error_code)
* the signal is delivered.
*/
clear_dr7:
__asm__("movl %0,%%db7"
: /* no output */
: "r" (0));
set_debugreg(0, 7);
return;
debug_vm86:

14
arch/i386/power/cpu.c
View File

@ -94,13 +94,13 @@ static void fix_processor_context(void)
* Now maybe reload the debug registers
*/
if (current->thread.debugreg[7]){
loaddebug(&current->thread, 0);
loaddebug(&current->thread, 1);
loaddebug(&current->thread, 2);
loaddebug(&current->thread, 3);
/* no 4 and 5 */
loaddebug(&current->thread, 6);
loaddebug(&current->thread, 7);
set_debugreg(current->thread.debugreg[0], 0);
set_debugreg(current->thread.debugreg[1], 1);
set_debugreg(current->thread.debugreg[2], 2);
set_debugreg(current->thread.debugreg[3], 3);
/* no 4 and 5 */
set_debugreg(current->thread.debugreg[6], 6);
set_debugreg(current->thread.debugreg[7], 7);
}
}