101 lines
2.9 KiB
C
101 lines
2.9 KiB
C
/*-
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* Copyright (c) 2016 Ruslan Bukin <br@bsdpad.com>
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* All rights reserved.
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*
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* Portions of this software were developed by SRI International and the
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* University of Cambridge Computer Laboratory under DARPA/AFRL contract
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* FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme.
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*
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* Portions of this software were developed by the University of Cambridge
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* Computer Laboratory as part of the CTSRD Project, with support from the
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* UK Higher Education Innovation Fund (HEIF).
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/stack.h>
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#include <machine/vmparam.h>
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#include <machine/pcb.h>
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#include <machine/stack.h>
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static void
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stack_capture(struct stack *st, struct unwind_state *frame)
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{
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stack_zero(st);
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while (1) {
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unwind_frame(frame);
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if (!INKERNEL((vm_offset_t)frame->fp) ||
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!INKERNEL((vm_offset_t)frame->pc))
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break;
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if (stack_put(st, frame->pc) == -1)
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break;
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}
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}
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void
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stack_save_td(struct stack *st, struct thread *td)
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{
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struct unwind_state frame;
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if (TD_IS_SWAPPED(td))
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panic("stack_save_td: swapped");
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if (TD_IS_RUNNING(td))
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panic("stack_save_td: running");
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frame.sp = td->td_pcb->pcb_sp;
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frame.fp = td->td_pcb->pcb_s[0];
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frame.pc = td->td_pcb->pcb_ra;
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stack_capture(st, &frame);
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}
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int
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stack_save_td_running(struct stack *st, struct thread *td)
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{
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return (EOPNOTSUPP);
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}
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void
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stack_save(struct stack *st)
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{
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struct unwind_state frame;
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uint64_t sp;
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__asm __volatile("mv %0, sp" : "=&r" (sp));
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frame.sp = sp;
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frame.fp = (uint64_t)__builtin_frame_address(0);
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frame.pc = (uint64_t)stack_save;
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stack_capture(st, &frame);
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}
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