stacktrace.c

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/*
 * arch/ia64/kernel/stacktrace.c
 *
 * Stack trace management functions
 *
 */
#include <linux/sched.h>
#include <linux/stacktrace.h>
#include <linux/module.h>

static void
ia64_do_save_stack(struct unw_frame_info *info, void *arg)
{
    struct stack_trace *trace = arg;
    unsigned long ip;
    int skip = trace->skip;

    trace->nr_entries = 0;
    do {
        unw_get_ip(info, &ip);
        if (ip == 0)
            break;
        if (skip == 0) {
            trace->entries[trace->nr_entries++] = ip;
            if (trace->nr_entries == trace->max_entries)
                break;
        } else
            skip--;
    } while (unw_unwind(info) >= 0);
}

/*
 * Save stack-backtrace addresses into a stack_trace buffer.
 */
void save_stack_trace(struct stack_trace *trace)
{
    unw_init_running(ia64_do_save_stack, trace);
}
EXPORT_SYMBOL(save_stack_trace);