0317861660
cpu_switch/throw() and savectx() do not save or restore any values in these fields which mostly held non-callee-save registers. makectx() copied these fields from kdb_frame, but they weren't used except for PC_REGS using pcb_sepc. Change PC_REGS to use kdb_frame->tf_sepc directly instead. Reviewed by: br MFC after: 2 weeks Sponsored by: DARPA Differential Revision: https://reviews.freebsd.org/D23395
66 lines
2.5 KiB
C
66 lines
2.5 KiB
C
/*-
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* Copyright (c) 2015-2016 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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* $FreeBSD$
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*/
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#ifndef _MACHINE_PCB_H_
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#define _MACHINE_PCB_H_
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#ifndef LOCORE
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struct trapframe;
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struct pcb {
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uint64_t pcb_ra; /* Return address */
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uint64_t pcb_sp; /* Stack pointer */
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uint64_t pcb_gp; /* Global pointer */
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uint64_t pcb_tp; /* Thread pointer */
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uint64_t pcb_s[12]; /* Saved registers */
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uint64_t pcb_x[32][2]; /* Floating point registers */
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uint64_t pcb_fcsr; /* Floating point control reg */
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uint64_t pcb_fpflags; /* Floating point flags */
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#define PCB_FP_STARTED 0x1
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#define PCB_FP_USERMASK 0x1
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vm_offset_t pcb_onfault; /* Copyinout fault handler */
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};
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#ifdef _KERNEL
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void makectx(struct trapframe *tf, struct pcb *pcb);
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int savectx(struct pcb *pcb) __returns_twice;
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#endif
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#endif /* !LOCORE */
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#endif /* !_MACHINE_PCB_H_ */
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