ab1b6f03a1
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>
36 lines
777 B
C
36 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);
|
|
}
|