x86: single_step segment macros
This cleans up the single-step code to use the asm/segment.h macros
for segment selector magic bits, rather than its own constant.
Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/arch/x86/kernel/step.c b/arch/x86/kernel/step.c
index cb3c8bc..3b70f20 100644
--- a/arch/x86/kernel/step.c
+++ b/arch/x86/kernel/step.c
@@ -5,8 +5,6 @@
#include <linux/mm.h>
#include <linux/ptrace.h>
-#define LDT_SEGMENT 4
-
unsigned long convert_rip_to_linear(struct task_struct *child, struct pt_regs *regs)
{
unsigned long addr, seg;
@@ -20,7 +18,7 @@
* TLS segments are used for data, and the PNPBIOS
* and APM bios ones we just ignore here.
*/
- if (seg & LDT_SEGMENT) {
+ if ((seg & SEGMENT_TI_MASK) == SEGMENT_LDT) {
u32 *desc;
unsigned long base;