linux/arch/sparc64/kernel/stacktrace.c
Christoph Hellwig ab1b6f03a1 simplify the stacktrace code
Simplify the stacktrace code:

 - remove the unused task argument to save_stack_trace, it's always
   current
 - remove the all_contexts flag, it's alwasy 0

Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Andi Kleen <ak@suse.de>
Cc: Akinobu Mita <akinobu.mita@gmail.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08 11:14:58 -07:00

35 lines
777 B
C

#include <linux/sched.h>
#include <linux/stacktrace.h>
#include <linux/thread_info.h>
#include <asm/ptrace.h>
void save_stack_trace(struct stack_trace *trace)
{
unsigned long ksp, fp, thread_base;
struct thread_info *tp = task_thread_info(current);
flushw_all();
__asm__ __volatile__(
"mov %%fp, %0"
: "=r" (ksp)
);
fp = ksp + STACK_BIAS;
thread_base = (unsigned long) tp;
do {
struct reg_window *rw;
/* Bogus frame pointer? */
if (fp < (thread_base + sizeof(struct thread_info)) ||
fp >= (thread_base + THREAD_SIZE))
break;
rw = (struct reg_window *) fp;
if (trace->skip > 0)
trace->skip--;
else
trace->entries[trace->nr_entries++] = rw->ins[7];
fp = rw->ins[6] + STACK_BIAS;
} while (trace->nr_entries < trace->max_entries);
}