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-rw-r--r--arch/powerpc/kernel/entry_64.S3
-rw-r--r--arch/powerpc/kernel/head_32.S5
-rw-r--r--arch/powerpc/kernel/process.c28
-rw-r--r--arch/powerpc/xmon/xmon.c13
-rw-r--r--include/asm-powerpc/ptrace.h9
5 files changed, 26 insertions, 32 deletions
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index 148a3547c9aa..13019845536b 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -29,6 +29,7 @@
#include <asm/cputable.h>
#include <asm/firmware.h>
#include <asm/bug.h>
+#include <asm/ptrace.h>
/*
* System calls.
@@ -39,7 +40,7 @@
/* This value is used to mark exception frames on the stack. */
exception_marker:
- .tc ID_72656773_68657265[TC],0x7265677368657265
+ .tc ID_EXC_MARKER[TC],STACK_FRAME_REGS_MARKER
.section ".text"
.align 7
diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S
index c16d1354b19d..785af9b56591 100644
--- a/arch/powerpc/kernel/head_32.S
+++ b/arch/powerpc/kernel/head_32.S
@@ -30,6 +30,7 @@
#include <asm/thread_info.h>
#include <asm/ppc_asm.h>
#include <asm/asm-offsets.h>
+#include <asm/ptrace.h>
/* 601 only have IBAT; cr0.eq is set on 601 when using this macro */
#define LOAD_BAT(n, reg, RA, RB) \
@@ -268,8 +269,8 @@ __secondary_hold_acknowledge:
li r10,MSR_KERNEL & ~(MSR_IR|MSR_DR); /* can take exceptions */ \
MTMSRD(r10); /* (except for mach check in rtas) */ \
stw r0,GPR0(r11); \
- lis r10,0x7265; /* put exception frame marker */ \
- addi r10,r10,0x6773; \
+ lis r10,STACK_FRAME_REGS_MARKER@ha; /* exception frame marker */ \
+ addi r10,r10,STACK_FRAME_REGS_MARKER@l; \
stw r10,8(r11); \
SAVE_4GPRS(3, r11); \
SAVE_2GPRS(7, r11)
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index a27910207c7e..703100d5e458 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -914,20 +914,6 @@ int validate_sp(unsigned long sp, struct task_struct *p,
return valid_irq_stack(sp, p, nbytes);
}
-#ifdef CONFIG_PPC64
-#define MIN_STACK_FRAME 112 /* same as STACK_FRAME_OVERHEAD, in fact */
-#define FRAME_LR_SAVE 2
-#define INT_FRAME_SIZE (sizeof(struct pt_regs) + STACK_FRAME_OVERHEAD + 288)
-#define REGS_MARKER 0x7265677368657265ul
-#define FRAME_MARKER 12
-#else
-#define MIN_STACK_FRAME 16
-#define FRAME_LR_SAVE 1
-#define INT_FRAME_SIZE (sizeof(struct pt_regs) + STACK_FRAME_OVERHEAD)
-#define REGS_MARKER 0x72656773ul
-#define FRAME_MARKER 2
-#endif
-
EXPORT_SYMBOL(validate_sp);
unsigned long get_wchan(struct task_struct *p)
@@ -939,15 +925,15 @@ unsigned long get_wchan(struct task_struct *p)
return 0;
sp = p->thread.ksp;
- if (!validate_sp(sp, p, MIN_STACK_FRAME))
+ if (!validate_sp(sp, p, STACK_FRAME_OVERHEAD))
return 0;
do {
sp = *(unsigned long *)sp;
- if (!validate_sp(sp, p, MIN_STACK_FRAME))
+ if (!validate_sp(sp, p, STACK_FRAME_OVERHEAD))
return 0;
if (count > 0) {
- ip = ((unsigned long *)sp)[FRAME_LR_SAVE];
+ ip = ((unsigned long *)sp)[STACK_FRAME_LR_SAVE];
if (!in_sched_functions(ip))
return ip;
}
@@ -976,12 +962,12 @@ void show_stack(struct task_struct *tsk, unsigned long *stack)
lr = 0;
printk("Call Trace:\n");
do {
- if (!validate_sp(sp, tsk, MIN_STACK_FRAME))
+ if (!validate_sp(sp, tsk, STACK_FRAME_OVERHEAD))
return;
stack = (unsigned long *) sp;
newsp = stack[0];
- ip = stack[FRAME_LR_SAVE];
+ ip = stack[STACK_FRAME_LR_SAVE];
if (!firstframe || ip != lr) {
printk("["REG"] ["REG"] ", sp, ip);
print_symbol("%s", ip);
@@ -995,8 +981,8 @@ void show_stack(struct task_struct *tsk, unsigned long *stack)
* See if this is an exception frame.
* We look for the "regshere" marker in the current frame.
*/
- if (validate_sp(sp, tsk, INT_FRAME_SIZE)
- && stack[FRAME_MARKER] == REGS_MARKER) {
+ if (validate_sp(sp, tsk, STACK_INT_FRAME_SIZE)
+ && stack[STACK_FRAME_MARKER] == STACK_FRAME_REGS_MARKER) {
struct pt_regs *regs = (struct pt_regs *)
(sp + STACK_FRAME_OVERHEAD);
printk("--- Exception: %lx", regs->trap);
diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c
index 00fd7647f807..52c74780f403 100644
--- a/arch/powerpc/xmon/xmon.c
+++ b/arch/powerpc/xmon/xmon.c
@@ -1243,15 +1243,12 @@ static void get_function_bounds(unsigned long pc, unsigned long *startp,
static int xmon_depth_to_print = 64;
-#ifdef CONFIG_PPC64
-#define LRSAVE_OFFSET 0x10
-#define REG_FRAME_MARKER 0x7265677368657265ul /* "regshere" */
-#define MARKER_OFFSET 0x60
+#define LRSAVE_OFFSET (STACK_FRAME_LR_SAVE * sizeof(unsigned long))
+#define MARKER_OFFSET (STACK_FRAME_MARKER * sizeof(unsigned long))
+
+#ifdef __powerpc64__
#define REGS_OFFSET 0x70
#else
-#define LRSAVE_OFFSET 4
-#define REG_FRAME_MARKER 0x72656773
-#define MARKER_OFFSET 8
#define REGS_OFFSET 16
#endif
@@ -1317,7 +1314,7 @@ static void xmon_show_stack(unsigned long sp, unsigned long lr,
/* Look for "regshere" marker to see if this is
an exception frame. */
if (mread(sp + MARKER_OFFSET, &marker, sizeof(unsigned long))
- && marker == REG_FRAME_MARKER) {
+ && marker == STACK_FRAME_REGS_MARKER) {
if (mread(sp + REGS_OFFSET, &regs, sizeof(regs))
!= sizeof(regs)) {
printf("Couldn't read registers at %lx\n",
diff --git a/include/asm-powerpc/ptrace.h b/include/asm-powerpc/ptrace.h
index 891d68932f39..39023dde1cc4 100644
--- a/include/asm-powerpc/ptrace.h
+++ b/include/asm-powerpc/ptrace.h
@@ -58,6 +58,11 @@ struct pt_regs {
#define __ARCH_WANT_COMPAT_SYS_PTRACE
#define STACK_FRAME_OVERHEAD 112 /* size of minimum stack frame */
+#define STACK_FRAME_LR_SAVE 2 /* Location of LR in stack frame */
+#define STACK_FRAME_REGS_MARKER ASM_CONST(0x7265677368657265)
+#define STACK_INT_FRAME_SIZE (sizeof(struct pt_regs) + \
+ STACK_FRAME_OVERHEAD + 288)
+#define STACK_FRAME_MARKER 12
/* Size of dummy stack frame allocated when calling signal handler. */
#define __SIGNAL_FRAMESIZE 128
@@ -66,6 +71,10 @@ struct pt_regs {
#else /* __powerpc64__ */
#define STACK_FRAME_OVERHEAD 16 /* size of minimum stack frame */
+#define STACK_FRAME_LR_SAVE 1 /* Location of LR in stack frame */
+#define STACK_FRAME_REGS_MARKER ASM_CONST(0x72656773)
+#define STACK_INT_FRAME_SIZE (sizeof(struct pt_regs) + STACK_FRAME_OVERHEAD)
+#define STACK_FRAME_MARKER 2
/* Size of stack frame allocated when calling signal handler. */
#define __SIGNAL_FRAMESIZE 64
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