asm-bug.h

 1/* SPDX-License-Identifier: GPL-2.0-only */
 2#ifndef __ASM_ASM_BUG_H
 3/*
 4 * Copyright (C) 2017  ARM Limited
 5 */
 6#define __ASM_ASM_BUG_H
 7
 8#include <asm/brk-imm.h>
 9
10#ifdef CONFIG_DEBUG_BUGVERBOSE
11#define _BUGVERBOSE_LOCATION(file, line) __BUGVERBOSE_LOCATION(file, line)
12#define __BUGVERBOSE_LOCATION(file, line)			\
13		.pushsection .rodata.str,"aMS",@progbits,1;	\
14	14472:	.string file;					\
15		.popsection;					\
16								\
17		.long 14472b - .;				\
18		.short line;
19#else
20#define _BUGVERBOSE_LOCATION(file, line)
21#endif
22
23#ifdef CONFIG_GENERIC_BUG
24#define __BUG_ENTRY_START				\
25		.pushsection __bug_table,"aw";		\
26		.align 2;				\
27	14470:	.long 14471f - .;			\
28
29#define __BUG_ENTRY_END					\
30		.align 2;				\
31		.popsection;				\
32	14471:
33
34#define __BUG_ENTRY(flags)				\
35		__BUG_ENTRY_START			\
36_BUGVERBOSE_LOCATION(__FILE__, __LINE__)		\
37		.short flags;				\
38		__BUG_ENTRY_END
39#else
40#define __BUG_ENTRY(flags)
41#endif
42
43#define ASM_BUG_FLAGS(flags)				\
44	__BUG_ENTRY(flags)				\
45	brk	BUG_BRK_IMM
46
47#define ASM_BUG()	ASM_BUG_FLAGS(0)
48
49#ifdef CONFIG_DEBUG_BUGVERBOSE
50#define __BUG_LOCATION_STRING(file, line)		\
51		".long " file "- .;"			\
52		".short " line ";"
53#else
54#define __BUG_LOCATION_STRING(file, line)
55#endif
56
57#define __BUG_ENTRY_STRING(file, line, flags)		\
58		__stringify(__BUG_ENTRY_START)		\
59		__BUG_LOCATION_STRING(file, line)	\
60		".short " flags ";"			\
61		__stringify(__BUG_ENTRY_END)
62
63#define ARCH_WARN_ASM(file, line, flags, size)		\
64	__BUG_ENTRY_STRING(file, line, flags)		\
65	__stringify(brk BUG_BRK_IMM)
66
67#define ARCH_WARN_REACHABLE
68
69#endif /* __ASM_ASM_BUG_H */