1/*
2 * Copyright (C) 2015  ARM Limited
3 * Author: Dave Martin <Dave.Martin@arm.com>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
16 */
17
18#ifndef _ARCH_ARM64_ASM_BUG_H
19#define _ARCH_ARM64_ASM_BUG_H
20
21#include <asm/debug-monitors.h>
22
23#ifdef CONFIG_GENERIC_BUG
24#define HAVE_ARCH_BUG
25
26#ifdef CONFIG_DEBUG_BUGVERBOSE
27#define _BUGVERBOSE_LOCATION(file, line) __BUGVERBOSE_LOCATION(file, line)
28#define __BUGVERBOSE_LOCATION(file, line)				\
29		".pushsection .rodata.str,\"aMS\",@progbits,1\n"	\
30	"2:	.string \"" file "\"\n\t"				\
31		".popsection\n\t"					\
32									\
33		".long 2b - 0b\n\t"					\
34		".short " #line "\n\t"
35#else
36#define _BUGVERBOSE_LOCATION(file, line)
37#endif
38
39#define _BUG_FLAGS(flags) __BUG_FLAGS(flags)
40
41#define __BUG_FLAGS(flags) asm volatile (		\
42		".pushsection __bug_table,\"a\"\n\t"	\
43		".align 2\n\t"				\
44	"0:	.long 1f - 0b\n\t"			\
45_BUGVERBOSE_LOCATION(__FILE__, __LINE__)		\
46		".short " #flags "\n\t"			\
47		".popsection\n"				\
48							\
49	"1:	brk %[imm]"				\
50		:: [imm] "i" (BUG_BRK_IMM)		\
51)
52
53#define BUG() do {				\
54	_BUG_FLAGS(0);				\
55	unreachable();				\
56} while (0)
57
58#define __WARN_TAINT(taint) _BUG_FLAGS(BUGFLAG_TAINT(taint))
59
60#endif /* ! CONFIG_GENERIC_BUG */
61
62#include <asm-generic/bug.h>
63
64#endif /* ! _ARCH_ARM64_ASM_BUG_H */
65