#include <asm/smp.h>
#include <asm/pdc.h>
#include <asm/pdc_chassis.h>
+#include <asm/unwind.h>
#include "../math-emu/math-emu.h" /* for handle_fpe() */
#define PRINT_USER_FAULTS /* (turn this on if you want user faults to be */
/* dumped to the console via printk) */
+#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
+spinlock_t pa_dbit_lock = SPIN_LOCK_UNLOCKED;
+#endif
+
int printbinary(char *buf, unsigned long x, int nbits)
{
unsigned long mask = 1UL << (nbits - 1);
void dump_stack(void)
{
- unsigned long stack;
- show_trace(current, &stack);
+ show_stack(NULL, NULL);
}
EXPORT_SYMBOL(dump_stack);
-#ifndef __LP64__
-static int kstack_depth_to_print = 64 * 4;
-#else
-static int kstack_depth_to_print = 128 * 4;
-#endif
-
-void show_stack(struct task_struct *task, unsigned long *sp)
+void show_stack(struct task_struct *task, unsigned long *s)
{
- unsigned long *stack;
- int i;
-
- /*
- * debugging aid: "show_stack(NULL);" prints the
- * back trace for this cpu.
- */
- if (task==NULL)
- sp = (unsigned long*)&sp;
- else if(sp == NULL)
- sp = (unsigned long*)task->thread.regs.ksp;
-
- stack = sp;
- printk("\n" KERN_CRIT "Stack Dump:\n");
- printk(KERN_CRIT " " RFMT ": ", (unsigned long) stack);
- for (i=0; i < kstack_depth_to_print; i++) {
- if (((long) stack & (THREAD_SIZE-1)) == 0)
- break;
- if (i && ((i & 0x03) == 0))
- printk("\n" KERN_CRIT " " RFMT ": ",
- (unsigned long) stack);
- printk(RFMT " ", *stack--);
+ int i = 1;
+ struct unwind_frame_info info;
+
+ if (!task) {
+ unsigned long sp, ip, rp;
+
+HERE:
+ asm volatile ("copy %%r30, %0" : "=r"(sp));
+ ip = (unsigned long)&&HERE;
+ rp = (unsigned long)__builtin_return_address(0);
+ unwind_frame_init(&info, current, sp, ip, rp);
+ } else {
+ unwind_frame_init_from_blocked_task(&info, task);
}
- printk("\n" KERN_CRIT "\n");
- show_trace(task, sp);
-}
+ printk("Backtrace:\n");
+ while (i <= 16) {
+ if (unwind_once(&info) < 0 || info.ip == 0)
+ break;
-void show_trace(struct task_struct *task, unsigned long *stack)
-{
- unsigned long *startstack;
- unsigned long addr;
- int i;
-
- startstack = (unsigned long *)((unsigned long)stack & ~(THREAD_SIZE - 1));
- i = 1;
- stack = (long *)((long)(stack + 32) &~ (FRAME_SIZE-1)); /* Align */
- printk("Kernel addresses on the stack:\n");
- while (stack > startstack) {
- stack -= 16; /* Stack frames are a multiple of 16 words */
- addr = stack[16 - RP_OFFSET / sizeof(long)];
- /*
- * 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 (kernel_text_address(addr)) {
- printk(" [<" RFMT ">] ", addr);
+ if (__kernel_text_address(info.ip)) {
+ printk(" [<" RFMT ">] ", info.ip);
#ifdef CONFIG_KALLSYMS
- print_symbol("%s\n", addr);
+ print_symbol("%s\n", info.ip);
#else
if ((i & 0x03) == 0)
printk("\n");