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-rw-r--r--arch/s390/kernel/entry64.S2
-rw-r--r--arch/s390/kernel/process.c1
-rw-r--r--arch/s390/kernel/traps.c10
-rw-r--r--include/asm-s390/lowcore.h2
-rw-r--r--include/asm-s390/processor.h7
5 files changed, 21 insertions, 1 deletions
diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S
index efde6e1..cd959c0 100644
--- a/arch/s390/kernel/entry64.S
+++ b/arch/s390/kernel/entry64.S
@@ -475,6 +475,7 @@ pgm_check_handler:
pgm_no_vtime:
#endif
lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct
+ mvc SP_ARGS(8,%r15),__LC_LAST_BREAK
TRACE_IRQS_OFF
lgf %r3,__LC_PGM_ILC # load program interruption code
lghi %r8,0x7f
@@ -847,6 +848,7 @@ stack_overflow:
je 0f
la %r1,__LC_SAVE_AREA+32
0: mvc SP_R12(32,%r15),0(%r1) # move %r12-%r15 to stack
+ mvc SP_ARGS(8,%r15),__LC_LAST_BREAK
xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15) # clear back chain
la %r2,SP_PTREGS(%r15) # load pt_regs
jg kernel_stack_overflow
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index dbefd0d..c1aff19 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -195,6 +195,7 @@ void show_regs(struct pt_regs *regs)
/* Show stack backtrace if pt_regs is from kernel mode */
if (!(regs->psw.mask & PSW_MASK_PSTATE))
show_trace(NULL, (unsigned long *) regs->gprs[15]);
+ show_last_breaking_event(regs);
}
extern void kernel_thread_starter(void);
diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c
index b352413..57b607b 100644
--- a/arch/s390/kernel/traps.c
+++ b/arch/s390/kernel/traps.c
@@ -134,7 +134,6 @@ void show_trace(struct task_struct *task, unsigned long *stack)
else
__show_trace(sp, S390_lowcore.thread_info,
S390_lowcore.thread_info + THREAD_SIZE);
- printk("\n");
if (!task)
task = current;
debug_show_held_locks(task);
@@ -162,6 +161,15 @@ void show_stack(struct task_struct *task, unsigned long *sp)
show_trace(task, sp);
}
+#ifdef CONFIG_64BIT
+void show_last_breaking_event(struct pt_regs *regs)
+{
+ printk("Last Breaking-Event-Address:\n");
+ printk(" [<%016lx>] ", regs->args[0] & PSW_ADDR_INSN);
+ print_symbol("%s\n", regs->args[0] & PSW_ADDR_INSN);
+}
+#endif
+
/*
* The architecture-independent dump_stack generator
*/
diff --git a/include/asm-s390/lowcore.h b/include/asm-s390/lowcore.h
index 007c8a4..5de3efb 100644
--- a/include/asm-s390/lowcore.h
+++ b/include/asm-s390/lowcore.h
@@ -56,6 +56,8 @@
#define __LC_IO_INT_WORD 0x0C0
#define __LC_MCCK_CODE 0x0E8
+#define __LC_LAST_BREAK 0x110
+
#define __LC_RETURN_PSW 0x200
#define __LC_SAVE_AREA 0xC00
diff --git a/include/asm-s390/processor.h b/include/asm-s390/processor.h
index 51d8891..8eaf343 100644
--- a/include/asm-s390/processor.h
+++ b/include/asm-s390/processor.h
@@ -175,6 +175,13 @@ extern void task_show_regs(struct seq_file *m, struct task_struct *task);
extern void show_registers(struct pt_regs *regs);
extern void show_code(struct pt_regs *regs);
extern void show_trace(struct task_struct *task, unsigned long *sp);
+#ifdef CONFIG_64BIT
+extern void show_last_breaking_event(struct pt_regs *regs);
+#else
+static inline void show_last_breaking_event(struct pt_regs *regs)
+{
+}
+#endif
unsigned long get_wchan(struct task_struct *p);
#define task_pt_regs(tsk) ((struct pt_regs *) \
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