linux/arch/sparc64/kernel/stacktrace.c
Stephen Rothwell a05fe0389b stacktrace: fix build failure on sparc64
Today's linux-next build (spac64 allmodconfig) failed like this:

arch/sparc64/kernel/stacktrace.c:50: warning: type defaults to `int' in declaration of `EXPORT_SYMBOL_GPL'
arch/sparc64/kernel/stacktrace.c:50: warning: parameter names (without types) in function declaration
arch/sparc64/kernel/stacktrace.c:50: warning: data definition has no type or storage class

Signed-off-by: Stephen Rothwell <sf@canb.auug.org.au>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 14:24:58 +02:00

52 lines
1.1 KiB
C

#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))
break;
sf = (struct sparc_stackf *) fp;
regs = (struct pt_regs *) (sf + 1);
if ((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);