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/*-
* Copyright (c) 2005 Antoine Brodin
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/stack.h>
#include <sys/systm.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <vm/vm_extern.h>
#include <machine/db_machdep.h>
#include <machine/pcb.h>
#include <machine/spr.h>
#include <machine/stack.h>
#include <machine/trap.h>
static void
stack_capture(struct stack *st, register_t frame)
{
vm_offset_t callpc;
stack_zero(st);
if (frame < PAGE_SIZE)
return;
while (1) {
frame = *(register_t *)frame;
if (frame < PAGE_SIZE)
break;
callpc = *(vm_offset_t *)(frame + 4) - 4;
if ((callpc & 3) || (callpc < 0x100))
break;
/*
* Don't bother traversing trap-frames - there should
* be enough info down to the frame to work out where
* things are going wrong. Plus, prevents this shortened
* version of code from accessing user-space frames
*/
if (callpc + 4 == (register_t) &trapexit ||
callpc + 4 == (register_t) &asttrapexit)
break;
if (stack_put(st, callpc) == -1)
break;
}
}
void
stack_save_td(struct stack *st, struct thread *td)
{
register_t frame;
if (TD_IS_SWAPPED(td))
panic("stack_save_td: swapped");
if (TD_IS_RUNNING(td))
panic("stack_save_td: running");
frame = td->td_pcb->pcb_sp;
stack_capture(st, frame);
}
void
stack_save(struct stack *st)
{
register_t frame;
frame = (register_t)__builtin_frame_address(1);
stack_capture(st, frame);
}
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