1849aef49SAndrew Turner /* $NetBSD: csan.h,v 1.2 2019/11/06 06:57:22 maxv Exp $ */
2849aef49SAndrew Turner
3849aef49SAndrew Turner /*
4849aef49SAndrew Turner * Copyright (c) 2019 The NetBSD Foundation, Inc.
5849aef49SAndrew Turner * All rights reserved.
6849aef49SAndrew Turner *
7849aef49SAndrew Turner * This code is derived from software contributed to The NetBSD Foundation
8849aef49SAndrew Turner * by Maxime Villard.
9849aef49SAndrew Turner *
10849aef49SAndrew Turner * Redistribution and use in source and binary forms, with or without
11849aef49SAndrew Turner * modification, are permitted provided that the following conditions
12849aef49SAndrew Turner * are met:
13849aef49SAndrew Turner * 1. Redistributions of source code must retain the above copyright
14849aef49SAndrew Turner * notice, this list of conditions and the following disclaimer.
15849aef49SAndrew Turner * 2. Redistributions in binary form must reproduce the above copyright
16849aef49SAndrew Turner * notice, this list of conditions and the following disclaimer in the
17849aef49SAndrew Turner * documentation and/or other materials provided with the distribution.
18849aef49SAndrew Turner *
19849aef49SAndrew Turner * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20849aef49SAndrew Turner * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21849aef49SAndrew Turner * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22849aef49SAndrew Turner * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23849aef49SAndrew Turner * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24849aef49SAndrew Turner * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25849aef49SAndrew Turner * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26849aef49SAndrew Turner * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27849aef49SAndrew Turner * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28849aef49SAndrew Turner * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29849aef49SAndrew Turner * POSSIBILITY OF SUCH DAMAGE.
30849aef49SAndrew Turner */
31849aef49SAndrew Turner
32849aef49SAndrew Turner #include <machine/cpufunc.h>
33849aef49SAndrew Turner #include <machine/stack.h>
34849aef49SAndrew Turner #include <machine/vmparam.h>
35849aef49SAndrew Turner
36849aef49SAndrew Turner static inline bool
kcsan_md_unsupported(vm_offset_t addr)3768cad681SAndrew Turner kcsan_md_unsupported(vm_offset_t addr)
3868cad681SAndrew Turner {
3968cad681SAndrew Turner return false;
4068cad681SAndrew Turner }
4168cad681SAndrew Turner
4268cad681SAndrew Turner static inline bool
kcsan_md_is_avail(void)43849aef49SAndrew Turner kcsan_md_is_avail(void)
44849aef49SAndrew Turner {
45849aef49SAndrew Turner return true;
46849aef49SAndrew Turner }
47849aef49SAndrew Turner
48849aef49SAndrew Turner static inline void
kcsan_md_disable_intrs(uint64_t * state)49849aef49SAndrew Turner kcsan_md_disable_intrs(uint64_t *state)
50849aef49SAndrew Turner {
51849aef49SAndrew Turner
52849aef49SAndrew Turner *state = intr_disable();
53849aef49SAndrew Turner }
54849aef49SAndrew Turner
55849aef49SAndrew Turner static inline void
kcsan_md_enable_intrs(uint64_t * state)56849aef49SAndrew Turner kcsan_md_enable_intrs(uint64_t *state)
57849aef49SAndrew Turner {
58849aef49SAndrew Turner
59849aef49SAndrew Turner intr_restore(*state);
60849aef49SAndrew Turner }
61849aef49SAndrew Turner
62849aef49SAndrew Turner static inline void
kcsan_md_delay(uint64_t us)63849aef49SAndrew Turner kcsan_md_delay(uint64_t us)
64849aef49SAndrew Turner {
65849aef49SAndrew Turner DELAY(us);
66849aef49SAndrew Turner }
67849aef49SAndrew Turner
68849aef49SAndrew Turner static void
kcsan_md_unwind(void)69849aef49SAndrew Turner kcsan_md_unwind(void)
70849aef49SAndrew Turner {
71849aef49SAndrew Turner #ifdef DDB
72849aef49SAndrew Turner c_db_sym_t sym;
73849aef49SAndrew Turner db_expr_t offset;
74849aef49SAndrew Turner const char *symname;
75849aef49SAndrew Turner #endif
76849aef49SAndrew Turner struct unwind_state frame;
77849aef49SAndrew Turner int nsym;
78849aef49SAndrew Turner
794d16f941SJohn Baldwin frame.fp = (uintptr_t)__builtin_frame_address(0);
804d16f941SJohn Baldwin frame.pc = (uintptr_t)kcsan_md_unwind;
81849aef49SAndrew Turner nsym = 0;
82849aef49SAndrew Turner
83849aef49SAndrew Turner while (1) {
84*ae953968SJohn Baldwin if (!unwind_frame(curthread, &frame))
85*ae953968SJohn Baldwin break;
86*ae953968SJohn Baldwin if (!INKERNEL((vm_offset_t)frame.pc))
87849aef49SAndrew Turner break;
88849aef49SAndrew Turner
89849aef49SAndrew Turner #ifdef DDB
90849aef49SAndrew Turner sym = db_search_symbol((vm_offset_t)frame.pc, DB_STGY_PROC,
91849aef49SAndrew Turner &offset);
92849aef49SAndrew Turner db_symbol_values(sym, &symname, NULL);
93849aef49SAndrew Turner printf("#%d %p in %s+%#lx\n", nsym, (void *)frame.pc,
94849aef49SAndrew Turner symname, offset);
95849aef49SAndrew Turner #else
96849aef49SAndrew Turner printf("#%d %p\n", nsym, (void *)frame.pc);
97849aef49SAndrew Turner #endif
98849aef49SAndrew Turner nsym++;
99849aef49SAndrew Turner
100849aef49SAndrew Turner if (nsym >= 15) {
101849aef49SAndrew Turner break;
102849aef49SAndrew Turner }
103849aef49SAndrew Turner }
104849aef49SAndrew Turner }
105