Linux kernel mirror (for testing)
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_S390_BUG_H
3#define _ASM_S390_BUG_H
4
5#include <linux/compiler.h>
6#include <linux/const.h>
7
8#define MONCODE_BUG _AC(0, U)
9#define MONCODE_BUG_ARG _AC(1, U)
10
11#ifndef __ASSEMBLER__
12#if defined(CONFIG_BUG) && defined(CONFIG_CC_HAS_ASM_IMMEDIATE_STRINGS)
13
14#ifdef CONFIG_DEBUG_BUGVERBOSE
15#define __BUG_ENTRY_VERBOSE(format, file, line) \
16 " .long " format " - . # bug_entry::format\n" \
17 " .long " file " - . # bug_entry::file\n" \
18 " .short " line " # bug_entry::line\n"
19#else
20#define __BUG_ENTRY_VERBOSE(format, file, line)
21#endif
22
23#ifdef CONFIG_DEBUG_BUGVERBOSE_DETAILED
24#define WARN_CONDITION_STR(cond_str) cond_str
25#else
26#define WARN_CONDITION_STR(cond_str) ""
27#endif
28
29#define __BUG_ENTRY(format, file, line, flags, size) \
30 " .section __bug_table,\"aw\"\n" \
31 "1: .long 0b - . # bug_entry::bug_addr\n" \
32 __BUG_ENTRY_VERBOSE(format, file, line) \
33 " .short "flags" # bug_entry::flags\n" \
34 " .org 1b+"size"\n" \
35 " .previous"
36
37#define __BUG_ASM(cond_str, flags) \
38do { \
39 asm_inline volatile("\n" \
40 "0: mc %[monc](%%r0),0\n" \
41 __BUG_ENTRY("%[frmt]", "%[file]", "%[line]", \
42 "%[flgs]", "%[size]") \
43 : \
44 : [monc] "i" (MONCODE_BUG), \
45 [frmt] "i" (WARN_CONDITION_STR(cond_str)), \
46 [file] "i" (__FILE__), \
47 [line] "i" (__LINE__), \
48 [flgs] "i" (flags), \
49 [size] "i" (sizeof(struct bug_entry))); \
50} while (0)
51
52#define BUG() \
53do { \
54 __BUG_ASM("", 0); \
55 unreachable(); \
56} while (0)
57
58#define __WARN_FLAGS(cond_str, flags) \
59do { \
60 __BUG_ASM(cond_str, BUGFLAG_WARNING | (flags)); \
61} while (0)
62
63#define __WARN_bug_entry(flags, format) \
64({ \
65 struct bug_entry *bug; \
66 \
67 asm_inline volatile("\n" \
68 "0: larl %[bug],1f\n" \
69 __BUG_ENTRY("%[frmt]", "%[file]", "%[line]", \
70 "%[flgs]", "%[size]") \
71 : [bug] "=d" (bug) \
72 : [frmt] "i" (format), \
73 [file] "i" (__FILE__), \
74 [line] "i" (__LINE__), \
75 [flgs] "i" (flags), \
76 [size] "i" (sizeof(struct bug_entry))); \
77 bug; \
78})
79
80/*
81 * Variable Argument List (va_list) as defined in ELF Application
82 * Binary Interface s390x Supplement documentation.
83 */
84struct arch_va_list {
85 long __gpr;
86 long __fpr;
87 void *__overflow_arg_area;
88 void *__reg_save_area;
89};
90
91struct bug_entry;
92struct pt_regs;
93
94void *__warn_args(struct arch_va_list *args, struct pt_regs *regs);
95void __WARN_trap(struct bug_entry *bug, ...);
96
97#define __WARN_print_arg(flags, format, arg...) \
98do { \
99 int __flags = (flags) | BUGFLAG_WARNING | BUGFLAG_ARGS; \
100 \
101 __WARN_trap(__WARN_bug_entry(__flags, format), ## arg); \
102 /* prevent tail-call optimization */ \
103 asm(""); \
104} while (0)
105
106#define __WARN_printf(taint, fmt, arg...) \
107 __WARN_print_arg(BUGFLAG_TAINT(taint), fmt, ## arg)
108
109#define WARN_ONCE(cond, format, arg...) \
110({ \
111 int __ret_warn_on = !!(cond); \
112 \
113 if (unlikely(__ret_warn_on)) { \
114 __WARN_print_arg(BUGFLAG_ONCE|BUGFLAG_TAINT(TAINT_WARN),\
115 format, ## arg); \
116 } \
117 __ret_warn_on; \
118})
119
120#define HAVE_ARCH_BUG
121#define HAVE_ARCH_BUG_FORMAT
122#define HAVE_ARCH_BUG_FORMAT_ARGS
123
124#endif /* CONFIG_BUG && CONFIG_CC_HAS_ASM_IMMEDIATE_STRINGS */
125#endif /* __ASSEMBLER__ */
126
127#include <asm-generic/bug.h>
128
129#endif /* _ASM_S390_BUG_H */