m68knommu: m68knommu: add old stack trace method
The old method is used when frame pointers are not available.
Also fix formating with CONFIG_KALLSYMS=n which eliminates \n.
Signed-off-by: Sebastian Siewior <bigeasy@linutronix.de>
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
diff --git a/arch/m68knommu/kernel/traps.c b/arch/m68knommu/kernel/traps.c
index ec9aea6..46f8f9d 100644
--- a/arch/m68knommu/kernel/traps.c
+++ b/arch/m68knommu/kernel/traps.c
@@ -103,12 +103,28 @@
force_sig(SIGSEGV, current);
}
+static void print_this_address(unsigned long addr, int i)
+{
+#ifdef CONFIG_KALLSYMS
+ printk(KERN_EMERG " [%08lx] ", addr);
+ print_symbol(KERN_CONT "%s\n", addr);
+#else
+ if (i % 5)
+ printk(KERN_CONT " [%08lx] ", addr);
+ else
+ printk(KERN_CONT "\n" KERN_EMERG " [%08lx] ", addr);
+ i++;
+#endif
+}
+
int kstack_depth_to_print = 48;
static void __show_stack(struct task_struct *task, unsigned long *stack)
{
unsigned long *endstack, addr;
+#ifdef CONFIG_FRAME_POINTER
unsigned long *last_stack;
+#endif
int i;
if (!stack)
@@ -126,6 +142,7 @@
printk(" %08lx", *(stack + i));
}
printk("\n");
+ i = 0;
#ifdef CONFIG_FRAME_POINTER
printk(KERN_EMERG "Call Trace:\n");
@@ -134,15 +151,30 @@
while (stack <= endstack && stack > last_stack) {
addr = *(stack + 1);
- printk(KERN_EMERG " [%08lx] ", addr);
- print_symbol(KERN_CONT "%s\n", addr);
+ print_this_address(addr, i);
+ i++;
last_stack = stack;
stack = (unsigned long *)*stack;
}
printk("\n");
#else
- printk(KERN_EMERG "CONFIG_FRAME_POINTER disabled, no symbolic call trace\n");
+ printk(KERN_EMERG "Call Trace with CONFIG_FRAME_POINTER disabled:\n");
+ while (stack <= endstack) {
+ addr = *stack++;
+ /*
+ * If the address is either in the text segment of the kernel,
+ * or in a region which is occupied by a module then it *may*
+ * be the address of a calling routine; if so, print it so that
+ * someone tracing down the cause of the crash will be able to
+ * figure out the call path that was taken.
+ */
+ if (__kernel_text_address(addr)) {
+ print_this_address(addr, i);
+ i++;
+ }
+ }
+ printk(KERN_CONT "\n");
#endif
}