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#include <linux/sched.h>
#include <linux/stacktrace.h>
#include <linux/thread_info.h>
#include <linux/module.h>
#include <asm/ptrace.h>
#include <asm/stacktrace.h>
void save_stack_trace(struct stack_trace *trace)
{
unsigned long ksp, fp, thread_base;
struct thread_info *tp = task_thread_info(current);
stack_trace_flush();
__asm__ __volatile__(
"mov %%fp, %0"
: "=r" (ksp)
);
fp = ksp + STACK_BIAS;
thread_base = (unsigned long) tp;
do {
struct sparc_stackf *sf;
struct pt_regs *regs;
unsigned long pc;
/* Bogus frame pointer? */
if (fp < (thread_base + sizeof(struct thread_info)) ||
fp > (thread_base + THREAD_SIZE - sizeof(struct sparc_stackf)))
break;
sf = (struct sparc_stackf *) fp;
regs = (struct pt_regs *) (sf + 1);
if (((unsigned long)regs <=
(thread_base + THREAD_SIZE - sizeof(*regs))) &&
(regs->magic & ~0x1ff) == PT_REGS_MAGIC) {
if (!(regs->tstate & TSTATE_PRIV))
break;
pc = regs->tpc;
fp = regs->u_regs[UREG_I6] + STACK_BIAS;
} else {
pc = sf->callers_pc;
fp = (unsigned long)sf->fp + STACK_BIAS;
}
if (trace->skip > 0)
trace->skip--;
else
trace->entries[trace->nr_entries++] = pc;
} while (trace->nr_entries < trace->max_entries);
}
EXPORT_SYMBOL_GPL(save_stack_trace);
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