2 files changed, 75 insertions, 61 deletions

diff --git a/arch/sh/kernel/process.c b/arch/sh/kernel/process.c
index 91516dca4a85..a52b13ac6b7f 100644
--- a/arch/sh/kernel/process.c
+++ b/arch/sh/kernel/process.c
@@ -105,7 +105,7 @@ void show_regs(struct pt_regs * regs)
 {
 	printk("\n");
 	printk("Pid : %d, Comm: %20s\n", current->pid, current->comm);
-	print_symbol("PC is at %s\n", regs->pc);
+	print_symbol("PC is at %s\n", instruction_pointer(regs));
 	printk("PC  : %08lx SP  : %08lx SR  : %08lx ",
 	       regs->pc, regs->regs[15], regs->sr);
 #ifdef CONFIG_MMU
@@ -130,15 +130,7 @@ void show_regs(struct pt_regs * regs)
 	printk("MACH: %08lx MACL: %08lx GBR : %08lx PR  : %08lx\n",
 	       regs->mach, regs->macl, regs->gbr, regs->pr);
 
-	/*
-	 * If we're in kernel mode, dump the stack too..
-	 */
-	if (!user_mode(regs)) {
-		extern void show_task(unsigned long *sp);
-		unsigned long sp = regs->regs[15];
-
-		show_task((unsigned long *)sp);
-	}
+	show_trace(NULL, (unsigned long *)regs->regs[15], regs);
 }
 
 /*
diff --git a/arch/sh/kernel/traps.c b/arch/sh/kernel/traps.c
index c2c597e09482..ffe127f09f3e 100644
--- a/arch/sh/kernel/traps.c
+++ b/arch/sh/kernel/traps.c
@@ -1,16 +1,15 @@
-/* $Id: traps.c,v 1.17 2004/05/02 01:46:30 sugioka Exp $
- *
- *  linux/arch/sh/traps.c
+/*
+ * 'traps.c' handles hardware traps and faults after we have saved some
+ * state in 'entry.S'.
  *
  *  SuperH version: Copyright (C) 1999 Niibe Yutaka
  *                  Copyright (C) 2000 Philipp Rumpf
  *                  Copyright (C) 2000 David Howells
- *                  Copyright (C) 2002, 2003 Paul Mundt
- */
-
-/*
- * 'Traps.c' handles hardware traps and faults after we have saved some
- * state in 'entry.S'.
+ *                  Copyright (C) 2002 - 2006 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
  */
 #include <linux/sched.h>
 #include <linux/kernel.h>
@@ -53,13 +52,32 @@
 #define TRAP_ILLEGAL_SLOT_INST	13
 #endif
 
-/*
- * These constants are for searching for possible module text
- * segments.  VMALLOC_OFFSET comes from mm/vmalloc.c; MODULE_RANGE is
- * a guess of how much space is likely to be vmalloced.
- */
-#define VMALLOC_OFFSET (8*1024*1024)
-#define MODULE_RANGE (8*1024*1024)
+static void dump_mem(const char *str, unsigned long bottom, unsigned long top)
+{
+	unsigned long p;
+	int i;
+
+	printk("%s(0x%08lx to 0x%08lx)\n", str, bottom, top);
+
+	for (p = bottom & ~31; p < top; ) {
+		printk("%04lx: ", p & 0xffff);
+
+		for (i = 0; i < 8; i++, p += 4) {
+			unsigned int val;
+
+			if (p < bottom || p >= top)
+				printk("         ");
+			else {
+				if (__get_user(val, (unsigned int __user *)p)) {
+					printk("\n");
+					return;
+				}
+				printk("%08x ", val);
+			}
+		}
+		printk("\n");
+	}
+}
 
 DEFINE_SPINLOCK(die_lock);
 
@@ -69,14 +87,28 @@ void die(const char * str, struct pt_regs * regs, long err)
 
 	console_verbose();
 	spin_lock_irq(&die_lock);
+	bust_spinlocks(1);
+
 	printk("%s: %04lx [#%d]\n", str, err & 0xffff, ++die_counter);
+
 	CHK_REMOTE_DEBUG(regs);
+	print_modules();
 	show_regs(regs);
+
+	printk("Process: %s (pid: %d, stack limit = %p)\n",
+	       current->comm, current->pid, task_stack_page(current) + 1);
+
+	if (!user_mode(regs) || in_interrupt())
+		dump_mem("Stack: ", regs->regs[15], THREAD_SIZE +
+		 	 (unsigned long)task_stack_page(current));
+
+	bust_spinlocks(0);
 	spin_unlock_irq(&die_lock);
 	do_exit(SIGSEGV);
 }
 
-static inline void die_if_kernel(const char * str, struct pt_regs * regs, long err)
+static inline void die_if_kernel(const char *str, struct pt_regs *regs,
+				 long err)
 {
 	if (!user_mode(regs))
 		die(str, regs, err);
@@ -93,8 +125,7 @@ static int handle_unaligned_notify_count = 10;
  */
 static int die_if_no_fixup(const char * str, struct pt_regs * regs, long err)
 {
-	if (!user_mode(regs))
-	{
+	if (!user_mode(regs)) {
 		const struct exception_table_entry *fixup;
 		fixup = search_exception_tables(regs->pc);
 		if (fixup) {
@@ -734,52 +765,43 @@ void __init trap_init(void)
 	per_cpu_trap_init();
 }
 
-void show_stack(struct task_struct *tsk, unsigned long *sp)
+void show_trace(struct task_struct *tsk, unsigned long *sp,
+		struct pt_regs *regs)
 {
-	unsigned long *stack, addr;
-	unsigned long module_start = VMALLOC_START;
-	unsigned long module_end = VMALLOC_END;
-	int i = 1;
+	unsigned long addr;
 
-	if (!tsk)
-		tsk = current;
-	if (tsk == current)
-		sp = (unsigned long *)current_stack_pointer;
-	else
-		sp = (unsigned long *)tsk->thread.sp;
-
-	stack = sp;
+	if (regs && user_mode(regs))
+		return;
 
 	printk("\nCall trace: ");
 #ifdef CONFIG_KALLSYMS
 	printk("\n");
 #endif
 
-	while (!kstack_end(stack)) {
-		addr = *stack++;
-		if (((addr >= (unsigned long)_text) &&
-		     (addr <= (unsigned long)_etext)) ||
-		    ((addr >= module_start) && (addr <= module_end))) {
-			/*
-			 * For 80-columns display, 6 entry is maximum.
-			 * NOTE: '[<8c00abcd>] ' consumes 13 columns .
-			 */
-#ifndef CONFIG_KALLSYMS
-			if (i && ((i % 6) == 0))
-				printk("\n       ");
-#endif
-			printk("[<%08lx>] ", addr);
-			print_symbol("%s\n", addr);
-			i++;
-		}
+	while (!kstack_end(sp)) {
+		addr = *sp++;
+		if (kernel_text_address(addr))
+			print_ip_sym(addr);
 	}
 
 	printk("\n");
 }
 
-void show_task(unsigned long *sp)
+void show_stack(struct task_struct *tsk, unsigned long *sp)
 {
-	show_stack(NULL, sp);
+	unsigned long stack;
+
+	if (!tsk)
+		tsk = current;
+	if (tsk == current)
+		sp = (unsigned long *)current_stack_pointer;
+	else
+		sp = (unsigned long *)tsk->thread.sp;
+
+	stack = (unsigned long)sp;
+	dump_mem("Stack: ", stack, THREAD_SIZE +
+		 (unsigned long)task_stack_page(tsk));
+	show_trace(tsk, sp, NULL);
 }
 
 void dump_stack(void)