/*
* 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.
*/
/** @addtogroup libc
* @{
*/
/** @file
*/
#include <stdint.h>
#include <stdbool.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;
}
errno_t stacktrace_fp_prev(stacktrace_t *st, uintptr_t fp, uintptr_t *prev)
{
uintptr_t bprev;
errno_t rc;
rc = (*st->ops->read_uintptr)(st->op_arg, fp + FRAME_OFFSET_FP_PREV, &bprev);
if (rc == EOK)
*prev = bprev + STACK_BIAS;
return rc;
}
errno_t stacktrace_ra_get(stacktrace_t *st, uintptr_t fp, uintptr_t *ra)
{
return (*st->ops->read_uintptr)(st->op_arg, fp + FRAME_OFFSET_RA, ra);
}
/** @}
*/