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66dbeef9 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
d1515582 WD |
2 | #ifndef __LINUX_COMPILER_TYPES_H |
3 | #define __LINUX_COMPILER_TYPES_H | |
4 | ||
5 | #ifndef __ASSEMBLY__ | |
6 | ||
7 | #ifdef __CHECKER__ | |
8 | # define __user __attribute__((noderef, address_space(1))) | |
9 | # define __kernel __attribute__((address_space(0))) | |
10 | # define __safe __attribute__((safe)) | |
11 | # define __force __attribute__((force)) | |
12 | # define __nocast __attribute__((nocast)) | |
13 | # define __iomem __attribute__((noderef, address_space(2))) | |
14 | # define __must_hold(x) __attribute__((context(x,1,1))) | |
15 | # define __acquires(x) __attribute__((context(x,0,1))) | |
16 | # define __releases(x) __attribute__((context(x,1,0))) | |
17 | # define __acquire(x) __context__(x,1) | |
18 | # define __release(x) __context__(x,-1) | |
19 | # define __cond_lock(x,c) ((c) ? ({ __acquire(x); 1; }) : 0) | |
20 | # define __percpu __attribute__((noderef, address_space(3))) | |
21 | # define __rcu __attribute__((noderef, address_space(4))) | |
22 | # define __private __attribute__((noderef)) | |
23 | extern void __chk_user_ptr(const volatile void __user *); | |
24 | extern void __chk_io_ptr(const volatile void __iomem *); | |
25 | # define ACCESS_PRIVATE(p, member) (*((typeof((p)->member) __force *) &(p)->member)) | |
26 | #else /* __CHECKER__ */ | |
27 | # ifdef STRUCTLEAK_PLUGIN | |
28 | # define __user __attribute__((user)) | |
29 | # else | |
30 | # define __user | |
31 | # endif | |
32 | # define __kernel | |
33 | # define __safe | |
34 | # define __force | |
35 | # define __nocast | |
36 | # define __iomem | |
37 | # define __chk_user_ptr(x) (void)0 | |
38 | # define __chk_io_ptr(x) (void)0 | |
39 | # define __builtin_warning(x, y...) (1) | |
40 | # define __must_hold(x) | |
41 | # define __acquires(x) | |
42 | # define __releases(x) | |
43 | # define __acquire(x) (void)0 | |
44 | # define __release(x) (void)0 | |
45 | # define __cond_lock(x,c) (c) | |
46 | # define __percpu | |
47 | # define __rcu | |
48 | # define __private | |
49 | # define ACCESS_PRIVATE(p, member) ((p)->member) | |
50 | #endif /* __CHECKER__ */ | |
51 | ||
52 | /* Indirect macros required for expanded argument pasting, eg. __LINE__. */ | |
53 | #define ___PASTE(a,b) a##b | |
54 | #define __PASTE(a,b) ___PASTE(a,b) | |
55 | ||
56 | #ifdef __KERNEL__ | |
57 | ||
a3f8a30f MO |
58 | /* Attributes */ |
59 | #include <linux/compiler_attributes.h> | |
60 | ||
815f0ddb | 61 | /* Compiler specific macros. */ |
d1515582 WD |
62 | #ifdef __clang__ |
63 | #include <linux/compiler-clang.h> | |
815f0ddb ND |
64 | #elif defined(__INTEL_COMPILER) |
65 | #include <linux/compiler-intel.h> | |
66 | #elif defined(__GNUC__) | |
67 | /* The above compilers also define __GNUC__, so order is important here. */ | |
68 | #include <linux/compiler-gcc.h> | |
69 | #else | |
70 | #error "Unknown compiler" | |
d1515582 WD |
71 | #endif |
72 | ||
04f264d3 PB |
73 | /* |
74 | * Some architectures need to provide custom definitions of macros provided | |
75 | * by linux/compiler-*.h, and can do so using asm/compiler.h. We include that | |
76 | * conditionally rather than using an asm-generic wrapper in order to avoid | |
77 | * build failures if any C compilation, which will include this file via an | |
78 | * -include argument in c_flags, occurs prior to the asm-generic wrappers being | |
79 | * generated. | |
80 | */ | |
81 | #ifdef CONFIG_HAVE_ARCH_COMPILER_H | |
82 | #include <asm/compiler.h> | |
83 | #endif | |
84 | ||
d1515582 WD |
85 | struct ftrace_branch_data { |
86 | const char *func; | |
87 | const char *file; | |
88 | unsigned line; | |
89 | union { | |
90 | struct { | |
91 | unsigned long correct; | |
92 | unsigned long incorrect; | |
93 | }; | |
94 | struct { | |
95 | unsigned long miss; | |
96 | unsigned long hit; | |
97 | }; | |
98 | unsigned long miss_hit[2]; | |
99 | }; | |
100 | }; | |
101 | ||
102 | struct ftrace_likely_data { | |
103 | struct ftrace_branch_data data; | |
104 | unsigned long constant; | |
105 | }; | |
106 | ||
d1515582 WD |
107 | #endif /* __KERNEL__ */ |
108 | ||
815f0ddb ND |
109 | #endif /* __ASSEMBLY__ */ |
110 | ||
d1515582 | 111 | /* |
815f0ddb ND |
112 | * The below symbols may be defined for one or more, but not ALL, of the above |
113 | * compilers. We don't consider that to be an error, so set them to nothing. | |
114 | * For example, some of them are for compiler specific plugins. | |
d1515582 | 115 | */ |
d1515582 WD |
116 | #ifndef __latent_entropy |
117 | # define __latent_entropy | |
118 | #endif | |
119 | ||
120 | #ifndef __randomize_layout | |
121 | # define __randomize_layout __designated_init | |
122 | #endif | |
123 | ||
124 | #ifndef __no_randomize_layout | |
125 | # define __no_randomize_layout | |
126 | #endif | |
127 | ||
128 | #ifndef randomized_struct_fields_start | |
129 | # define randomized_struct_fields_start | |
130 | # define randomized_struct_fields_end | |
131 | #endif | |
132 | ||
8bd66d14 | 133 | #ifndef asm_volatile_goto |
134 | #define asm_volatile_goto(x...) asm goto(x) | |
135 | #endif | |
136 | ||
d1515582 | 137 | /* Are two types/vars the same type (ignoring qualifiers)? */ |
815f0ddb | 138 | #define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b)) |
d1515582 WD |
139 | |
140 | /* Is this type a native word size -- useful for atomic operations */ | |
815f0ddb ND |
141 | #define __native_word(t) \ |
142 | (sizeof(t) == sizeof(char) || sizeof(t) == sizeof(short) || \ | |
143 | sizeof(t) == sizeof(int) || sizeof(t) == sizeof(long)) | |
144 | ||
815f0ddb | 145 | /* Helpers for emitting diagnostics in pragmas. */ |
8793bb7f AB |
146 | #ifndef __diag |
147 | #define __diag(string) | |
148 | #endif | |
149 | ||
150 | #ifndef __diag_GCC | |
151 | #define __diag_GCC(version, severity, string) | |
152 | #endif | |
153 | ||
154 | #define __diag_push() __diag(push) | |
155 | #define __diag_pop() __diag(pop) | |
156 | ||
157 | #define __diag_ignore(compiler, version, option, comment) \ | |
158 | __diag_ ## compiler(version, ignore, option) | |
159 | #define __diag_warn(compiler, version, option, comment) \ | |
160 | __diag_ ## compiler(version, warn, option) | |
161 | #define __diag_error(compiler, version, option, comment) \ | |
162 | __diag_ ## compiler(version, error, option) | |
163 | ||
815f0ddb | 164 | #ifdef CONFIG_ENABLE_MUST_CHECK |
5c67a52f | 165 | #define __must_check __attribute__((__warn_unused_result__)) |
815f0ddb ND |
166 | #else |
167 | #define __must_check | |
168 | #endif | |
169 | ||
989bd500 | 170 | #if defined(CC_USING_HOTPATCH) |
815f0ddb ND |
171 | #define notrace __attribute__((hotpatch(0, 0))) |
172 | #else | |
5c67a52f | 173 | #define notrace __attribute__((__no_instrument_function__)) |
815f0ddb ND |
174 | #endif |
175 | ||
ae596de1 MO |
176 | /* |
177 | * it doesn't make sense on ARM (currently the only user of __naked) | |
178 | * to trace naked functions because then mcount is called without | |
179 | * stack and frame pointer being set up and there is no chance to | |
180 | * restore the lr register to the value before mcount was called. | |
181 | */ | |
5c67a52f | 182 | #define __naked __attribute__((__naked__)) notrace |
ae596de1 | 183 | |
815f0ddb ND |
184 | #define __compiler_offsetof(a, b) __builtin_offsetof(a, b) |
185 | ||
815f0ddb ND |
186 | /* |
187 | * Force always-inline if the user requests it so via the .config. | |
188 | * GCC does not warn about unused static inline functions for | |
189 | * -Wunused-function. This turns out to avoid the need for complex #ifdef | |
190 | * directives. Suppress the warning in clang as well by using "unused" | |
191 | * function attribute, which is redundant but not harmful for gcc. | |
192 | * Prefer gnu_inline, so that extern inline functions do not emit an | |
193 | * externally visible function. This makes extern inline behave as per gnu89 | |
194 | * semantics rather than c99. This prevents multiple symbol definition errors | |
195 | * of extern inline functions at link time. | |
196 | * A lot of inline functions can cause havoc with function tracing. | |
a3f8a30f MO |
197 | * Do not use __always_inline here, since currently it expands to inline again |
198 | * (which would break users of __always_inline). | |
815f0ddb ND |
199 | */ |
200 | #if !defined(CONFIG_ARCH_SUPPORTS_OPTIMIZED_INLINING) || \ | |
201 | !defined(CONFIG_OPTIMIZE_INLINING) | |
a3f8a30f MO |
202 | #define inline inline __attribute__((__always_inline__)) __gnu_inline \ |
203 | __maybe_unused notrace | |
815f0ddb | 204 | #else |
a3f8a30f MO |
205 | #define inline inline __gnu_inline \ |
206 | __maybe_unused notrace | |
815f0ddb ND |
207 | #endif |
208 | ||
209 | #define __inline__ inline | |
a3f8a30f | 210 | #define __inline inline |
815f0ddb | 211 | |
815f0ddb ND |
212 | /* |
213 | * Rather then using noinline to prevent stack consumption, use | |
214 | * noinline_for_stack instead. For documentation reasons. | |
215 | */ | |
216 | #define noinline_for_stack noinline | |
217 | ||
d1515582 | 218 | #endif /* __LINUX_COMPILER_TYPES_H */ |