stacktrace.c

Go to the documentation of this file.

/*
 * Copyright (c) 2010 Jakub Jermar
 * Copyright (c) 2010 Jiri Svoboda
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/types.h>
#include <bool.h>
#include <libarch/stack.h>
#include <errno.h>

#include <stacktrace.h>

#define FRAME_OFFSET_FP_PREV    (14 * 8)
#define FRAME_OFFSET_RA         (15 * 8)

bool stacktrace_fp_valid(stacktrace_t *st, uintptr_t fp)
{
        (void) st;
        return fp != 0;
}

int stacktrace_fp_prev(stacktrace_t *st, uintptr_t fp, uintptr_t *prev)
{
        uintptr_t bprev;
        int rc;

        rc = (*st->read_uintptr)(st->op_arg, fp + FRAME_OFFSET_FP_PREV, &bprev);
        if (rc == EOK)
                *prev = bprev + STACK_BIAS;
        return rc;
}

int stacktrace_ra_get(stacktrace_t *st, uintptr_t fp, uintptr_t *ra)
{
        return (*st->read_uintptr)(st->op_arg, fp + FRAME_OFFSET_RA, ra);
}

---