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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>
This commit is contained in:
Sebastian Siewior 2008-05-09 16:13:36 +02:00 committed by Greg Ungerer
parent 5732b38ddb
commit 1fda83d83c
1 changed files with 35 additions and 3 deletions
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38
arch/m68knommu/kernel/traps.c
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@ -103,12 +103,28 @@ asmlinkage void buserr_c(struct frame *fp)
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 @@ static void __show_stack(struct task_struct *task, unsigned long *stack)
printk(" %08lx", *(stack + i));
}
printk("\n");
i = 0;
#ifdef CONFIG_FRAME_POINTER
printk(KERN_EMERG "Call Trace:\n");
@ -134,15 +151,30 @@ static void __show_stack(struct task_struct *task, unsigned long *stack)
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
}