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 $ */
|
|
|
|
/*
|
|
* Copyright (c) 2019 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Maxime Villard.
|
|
*
|
|
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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 <machine/cpufunc.h>
|
|
#include <machine/stack.h>
|
|
#include <machine/vmparam.h>
|
|
|
|
static inline bool
|
|
kcsan_md_unsupported(vm_offset_t addr)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline bool
|
|
kcsan_md_is_avail(void)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
static inline void
|
|
kcsan_md_disable_intrs(uint64_t *state)
|
|
{
|
|
|
|
*state = intr_disable();
|
|
}
|
|
|
|
static inline void
|
|
kcsan_md_enable_intrs(uint64_t *state)
|
|
{
|
|
|
|
intr_restore(*state);
|
|
}
|
|
|
|
static inline void
|
|
kcsan_md_delay(uint64_t us)
|
|
{
|
|
DELAY(us);
|
|
}
|
|
|
|
static void
|
|
kcsan_md_unwind(void)
|
|
{
|
|
#ifdef DDB
|
|
c_db_sym_t sym;
|
|
db_expr_t offset;
|
|
const char *symname;
|
|
#endif
|
|
struct unwind_state frame;
|
|
int nsym;
|
|
|
|
frame.fp = (uintptr_t)__builtin_frame_address(0);
|
|
frame.pc = (uintptr_t)kcsan_md_unwind;
|
|
nsym = 0;
|
|
|
|
while (1) {
|
|
if (!unwind_frame(curthread, &frame))
|
|
break;
|
|
if (!INKERNEL((vm_offset_t)frame.pc))
|
|
break;
|
|
|
|
#ifdef DDB
|
|
sym = db_search_symbol((vm_offset_t)frame.pc, DB_STGY_PROC,
|
|
&offset);
|
|
db_symbol_values(sym, &symname, NULL);
|
|
printf("#%d %p in %s+%#lx\n", nsym, (void *)frame.pc,
|
|
symname, offset);
|
|
#else
|
|
printf("#%d %p\n", nsym, (void *)frame.pc);
|
|
#endif
|
|
nsym++;
|
|
|
|
if (nsym >= 15) {
|
|
break;
|
|
}
|
|
}
|
|
}
|