forked from Minki/linux
m68knommu: add pretty back strace
With this patch and CONFIG_FRAME_POINTER=y CONFIG_KALLSYMS=y The backtrace shows resolved function names and their numeric address. Signed-off-by: Sebastian Siewior <bigeasy@linutronix.de> Signed-off-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
parent
008150f537
commit
f6054e2131
@ -28,6 +28,7 @@
|
||||
#include <linux/linkage.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/ptrace.h>
|
||||
#include <linux/kallsyms.h>
|
||||
|
||||
#include <asm/setup.h>
|
||||
#include <asm/fpu.h>
|
||||
@ -102,56 +103,47 @@ asmlinkage void buserr_c(struct frame *fp)
|
||||
force_sig(SIGSEGV, current);
|
||||
}
|
||||
|
||||
|
||||
int kstack_depth_to_print = 48;
|
||||
|
||||
void show_stack(struct task_struct *task, unsigned long *stack)
|
||||
static void __show_stack(struct task_struct *task, unsigned long *stack)
|
||||
{
|
||||
unsigned long *endstack, addr;
|
||||
extern char _start, _etext;
|
||||
unsigned long *last_stack;
|
||||
int i;
|
||||
|
||||
if (!stack) {
|
||||
if (task)
|
||||
stack = (unsigned long *)task->thread.ksp;
|
||||
else
|
||||
stack = (unsigned long *)&stack;
|
||||
}
|
||||
if (!stack)
|
||||
stack = (unsigned long *)task->thread.ksp;
|
||||
|
||||
addr = (unsigned long) stack;
|
||||
endstack = (unsigned long *) PAGE_ALIGN(addr);
|
||||
|
||||
printk(KERN_EMERG "Stack from %08lx:", (unsigned long)stack);
|
||||
for (i = 0; i < kstack_depth_to_print; i++) {
|
||||
if (stack + 1 > endstack)
|
||||
if (stack + 1 + i > endstack)
|
||||
break;
|
||||
if (i % 8 == 0)
|
||||
printk("\n" KERN_EMERG " ");
|
||||
printk(" %08lx", *stack++);
|
||||
printk(" %08lx", *(stack + i));
|
||||
}
|
||||
printk("\n");
|
||||
|
||||
printk(KERN_EMERG "Call Trace:");
|
||||
i = 0;
|
||||
while (stack + 1 <= endstack) {
|
||||
addr = *stack++;
|
||||
/*
|
||||
* If the address is either in the text segment of the
|
||||
* kernel, or in the region which contains vmalloc'ed
|
||||
* memory, 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 (((addr >= (unsigned long) &_start) &&
|
||||
(addr <= (unsigned long) &_etext))) {
|
||||
if (i % 4 == 0)
|
||||
printk("\n" KERN_EMERG " ");
|
||||
printk(" [<%08lx>]", addr);
|
||||
i++;
|
||||
}
|
||||
#ifdef CONFIG_FRAME_POINTER
|
||||
printk(KERN_EMERG "Call Trace:\n");
|
||||
|
||||
last_stack = stack - 1;
|
||||
while (stack <= endstack && stack > last_stack) {
|
||||
|
||||
addr = *(stack + 1);
|
||||
printk(KERN_EMERG " [%08lx] ", addr);
|
||||
print_symbol(KERN_CONT "%s\n", addr);
|
||||
|
||||
last_stack = stack;
|
||||
stack = (unsigned long *)*stack;
|
||||
}
|
||||
printk("\n");
|
||||
#else
|
||||
printk(KERN_EMERG "CONFIG_FRAME_POINTER disabled, no symbolic call trace\n");
|
||||
#endif
|
||||
}
|
||||
|
||||
void bad_super_trap(struct frame *fp)
|
||||
@ -298,19 +290,47 @@ asmlinkage void set_esp0(unsigned long ssp)
|
||||
current->thread.esp0 = ssp;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* The architecture-independent backtrace generator
|
||||
*/
|
||||
void dump_stack(void)
|
||||
{
|
||||
unsigned long stack;
|
||||
/*
|
||||
* We need frame pointers for this little trick, which works as follows:
|
||||
*
|
||||
* +------------+ 0x00
|
||||
* | Next SP | -> 0x0c
|
||||
* +------------+ 0x04
|
||||
* | Caller |
|
||||
* +------------+ 0x08
|
||||
* | Local vars | -> our stack var
|
||||
* +------------+ 0x0c
|
||||
* | Next SP | -> 0x18, that is what we pass to show_stack()
|
||||
* +------------+ 0x10
|
||||
* | Caller |
|
||||
* +------------+ 0x14
|
||||
* | Local vars |
|
||||
* +------------+ 0x18
|
||||
* | ... |
|
||||
* +------------+
|
||||
*/
|
||||
|
||||
show_stack(current, &stack);
|
||||
unsigned long *stack;
|
||||
|
||||
stack = (unsigned long *)&stack;
|
||||
stack++;
|
||||
__show_stack(current, stack);
|
||||
}
|
||||
|
||||
EXPORT_SYMBOL(dump_stack);
|
||||
|
||||
void show_stack(struct task_struct *task, unsigned long *stack)
|
||||
{
|
||||
if (!stack && !task)
|
||||
dump_stack();
|
||||
else
|
||||
__show_stack(task, stack);
|
||||
}
|
||||
|
||||
#ifdef CONFIG_M68KFPU_EMU
|
||||
asmlinkage void fpemu_signal(int signal, int code, void *addr)
|
||||
{
|
||||
|
Loading…
Reference in New Issue
Block a user