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/*-
* Copyright (c) 2016 Ruslan Bukin <br@bsdpad.com>
* All rights reserved.
*
* Portions of this software were developed by SRI International and the
* University of Cambridge Computer Laboratory under DARPA/AFRL contract
* FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme.
*
* Portions of this software were developed by the University of Cambridge
* Computer Laboratory as part of the CTSRD Project, with support from the
* UK Higher Education Innovation Fund (HEIF).
*
* 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/systm.h>
#include <sys/proc.h>
#include <sys/stack.h>
#include <machine/vmparam.h>
#include <machine/pcb.h>
#include <machine/stack.h>
static void
stack_capture(struct stack *st, struct unwind_state *frame)
{
stack_zero(st);
while (1) {
unwind_frame(frame);
if (!INKERNEL((vm_offset_t)frame->fp) ||
!INKERNEL((vm_offset_t)frame->pc))
break;
if (stack_put(st, frame->pc) == -1)
break;
}
}
void
stack_save_td(struct stack *st, struct thread *td)
{
struct unwind_state frame;
if (TD_IS_SWAPPED(td))
panic("stack_save_td: swapped");
if (TD_IS_RUNNING(td))
panic("stack_save_td: running");
frame.sp = td->td_pcb->pcb_sp;
frame.fp = td->td_pcb->pcb_s[0];
frame.pc = td->td_pcb->pcb_ra;
stack_capture(st, &frame);
}
int
stack_save_td_running(struct stack *st, struct thread *td)
{
return (EOPNOTSUPP);
}
void
stack_save(struct stack *st)
{
struct unwind_state frame;
uint64_t sp;
__asm __volatile("mv %0, sp" : "=&r" (sp));
frame.sp = sp;
frame.fp = (uint64_t)__builtin_frame_address(0);
frame.pc = (uint64_t)stack_save;
stack_capture(st, &frame);
}
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