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105 lines
2.6 KiB
C
105 lines
2.6 KiB
C
/* $NetBSD: csan.h,v 1.2 2019/11/06 06:57:22 maxv Exp $ */
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/*
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* Copyright (c) 2019 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Maxime Villard.
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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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <machine/cpufunc.h>
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#include <machine/stack.h>
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#include <machine/vmparam.h>
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static inline bool
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kcsan_md_unsupported(vm_offset_t addr)
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{
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return false;
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}
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static inline bool
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kcsan_md_is_avail(void)
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{
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return true;
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}
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static inline void
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kcsan_md_disable_intrs(uint64_t *state)
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{
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*state = intr_disable();
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}
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static inline void
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kcsan_md_enable_intrs(uint64_t *state)
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{
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intr_restore(*state);
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}
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static inline void
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kcsan_md_delay(uint64_t us)
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{
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DELAY(us);
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}
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static void
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kcsan_md_unwind(void)
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{
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#ifdef DDB
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c_db_sym_t sym;
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db_expr_t offset;
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const char *symname;
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#endif
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struct unwind_state frame;
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int nsym;
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frame.fp = (uintptr_t)__builtin_frame_address(0);
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frame.pc = (uintptr_t)kcsan_md_unwind;
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nsym = 0;
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while (1) {
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if (!unwind_frame(curthread, &frame))
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break;
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if (!INKERNEL((vm_offset_t)frame.pc))
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break;
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#ifdef DDB
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sym = db_search_symbol((vm_offset_t)frame.pc, DB_STGY_PROC,
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&offset);
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db_symbol_values(sym, &symname, NULL);
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printf("#%d %p in %s+%#lx\n", nsym, (void *)frame.pc,
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symname, offset);
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#else
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printf("#%d %p\n", nsym, (void *)frame.pc);
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#endif
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nsym++;
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if (nsym >= 15) {
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break;
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}
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}
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}
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