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1 | #ifndef __LINUX_COMPILER_H |
1 | #ifndef __LINUX_COMPILER_H |
2 | #error "Please don't include |
2 | #error "Please don't include |
3 | #endif |
3 | #endif |
4 | 4 | ||
5 | /* |
5 | /* |
6 | * Common definitions for all gcc versions go here. |
6 | * Common definitions for all gcc versions go here. |
7 | */ |
7 | */ |
8 | #define GCC_VERSION (__GNUC__ * 10000 \ |
8 | #define GCC_VERSION (__GNUC__ * 10000 \ |
9 | + __GNUC_MINOR__ * 100 \ |
9 | + __GNUC_MINOR__ * 100 \ |
10 | + __GNUC_PATCHLEVEL__) |
10 | + __GNUC_PATCHLEVEL__) |
11 | 11 | ||
12 | /* Optimization barrier */ |
12 | /* Optimization barrier */ |
13 | 13 | ||
14 | /* The "volatile" is due to gcc bugs */ |
14 | /* The "volatile" is due to gcc bugs */ |
15 | #define barrier() __asm__ __volatile__("": : :"memory") |
15 | #define barrier() __asm__ __volatile__("": : :"memory") |
16 | /* |
16 | /* |
17 | * This version is i.e. to prevent dead stores elimination on @ptr |
17 | * This version is i.e. to prevent dead stores elimination on @ptr |
18 | * where gcc and llvm may behave differently when otherwise using |
18 | * where gcc and llvm may behave differently when otherwise using |
19 | * normal barrier(): while gcc behavior gets along with a normal |
19 | * normal barrier(): while gcc behavior gets along with a normal |
20 | * barrier(), llvm needs an explicit input variable to be assumed |
20 | * barrier(), llvm needs an explicit input variable to be assumed |
21 | * clobbered. The issue is as follows: while the inline asm might |
21 | * clobbered. The issue is as follows: while the inline asm might |
22 | * access any memory it wants, the compiler could have fit all of |
22 | * access any memory it wants, the compiler could have fit all of |
23 | * @ptr into memory registers instead, and since @ptr never escaped |
23 | * @ptr into memory registers instead, and since @ptr never escaped |
24 | * from that, it proofed that the inline asm wasn't touching any of |
24 | * from that, it proofed that the inline asm wasn't touching any of |
25 | * it. This version works well with both compilers, i.e. we're telling |
25 | * it. This version works well with both compilers, i.e. we're telling |
26 | * the compiler that the inline asm absolutely may see the contents |
26 | * the compiler that the inline asm absolutely may see the contents |
27 | * of @ptr. See also: https://llvm.org/bugs/show_bug.cgi?id=15495 |
27 | * of @ptr. See also: https://llvm.org/bugs/show_bug.cgi?id=15495 |
28 | */ |
28 | */ |
29 | #define barrier_data(ptr) __asm__ __volatile__("": :"r"(ptr) :"memory") |
29 | #define barrier_data(ptr) __asm__ __volatile__("": :"r"(ptr) :"memory") |
30 | 30 | ||
31 | /* |
31 | /* |
32 | * This macro obfuscates arithmetic on a variable address so that gcc |
32 | * This macro obfuscates arithmetic on a variable address so that gcc |
33 | * shouldn't recognize the original var, and make assumptions about it. |
33 | * shouldn't recognize the original var, and make assumptions about it. |
34 | * |
34 | * |
35 | * This is needed because the C standard makes it undefined to do |
35 | * This is needed because the C standard makes it undefined to do |
36 | * pointer arithmetic on "objects" outside their boundaries and the |
36 | * pointer arithmetic on "objects" outside their boundaries and the |
37 | * gcc optimizers assume this is the case. In particular they |
37 | * gcc optimizers assume this is the case. In particular they |
38 | * assume such arithmetic does not wrap. |
38 | * assume such arithmetic does not wrap. |
39 | * |
39 | * |
40 | * A miscompilation has been observed because of this on PPC. |
40 | * A miscompilation has been observed because of this on PPC. |
41 | * To work around it we hide the relationship of the pointer and the object |
41 | * To work around it we hide the relationship of the pointer and the object |
42 | * using this macro. |
42 | * using this macro. |
43 | * |
43 | * |
44 | * Versions of the ppc64 compiler before 4.1 had a bug where use of |
44 | * Versions of the ppc64 compiler before 4.1 had a bug where use of |
45 | * RELOC_HIDE could trash r30. The bug can be worked around by changing |
45 | * RELOC_HIDE could trash r30. The bug can be worked around by changing |
46 | * the inline assembly constraint from =g to =r, in this particular |
46 | * the inline assembly constraint from =g to =r, in this particular |
47 | * case either is valid. |
47 | * case either is valid. |
48 | */ |
48 | */ |
49 | #define RELOC_HIDE(ptr, off) \ |
49 | #define RELOC_HIDE(ptr, off) \ |
50 | ({ \ |
50 | ({ \ |
51 | unsigned long __ptr; \ |
51 | unsigned long __ptr; \ |
52 | __asm__ ("" : "=r"(__ptr) : "0"(ptr)); \ |
52 | __asm__ ("" : "=r"(__ptr) : "0"(ptr)); \ |
53 | (typeof(ptr)) (__ptr + (off)); \ |
53 | (typeof(ptr)) (__ptr + (off)); \ |
54 | }) |
54 | }) |
55 | 55 | ||
56 | /* Make the optimizer believe the variable can be manipulated arbitrarily. */ |
56 | /* Make the optimizer believe the variable can be manipulated arbitrarily. */ |
57 | #define OPTIMIZER_HIDE_VAR(var) \ |
57 | #define OPTIMIZER_HIDE_VAR(var) \ |
58 | __asm__ ("" : "=r" (var) : "0" (var)) |
58 | __asm__ ("" : "=r" (var) : "0" (var)) |
59 | 59 | ||
60 | #ifdef __CHECKER__ |
60 | #ifdef __CHECKER__ |
61 | #define __must_be_array(a) 0 |
61 | #define __must_be_array(a) 0 |
62 | #else |
62 | #else |
63 | /* &a[0] degrades to a pointer: a different type from an array */ |
63 | /* &a[0] degrades to a pointer: a different type from an array */ |
64 | #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) |
64 | #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) |
65 | #endif |
65 | #endif |
66 | 66 | ||
67 | /* |
67 | /* |
68 | * Force always-inline if the user requests it so via the .config, |
68 | * Force always-inline if the user requests it so via the .config, |
69 | * or if gcc is too old: |
69 | * or if gcc is too old: |
70 | */ |
70 | */ |
71 | #if !defined(CONFIG_ARCH_SUPPORTS_OPTIMIZED_INLINING) || \ |
71 | #if !defined(CONFIG_ARCH_SUPPORTS_OPTIMIZED_INLINING) || \ |
72 | !defined(CONFIG_OPTIMIZE_INLINING) || (__GNUC__ < 4) |
72 | !defined(CONFIG_OPTIMIZE_INLINING) || (__GNUC__ < 4) |
73 | #define inline inline __attribute__((always_inline)) notrace |
73 | #define inline inline __attribute__((always_inline)) notrace |
74 | #define __inline__ __inline__ __attribute__((always_inline)) notrace |
74 | #define __inline__ __inline__ __attribute__((always_inline)) notrace |
75 | #define __inline __inline __attribute__((always_inline)) notrace |
75 | #define __inline __inline __attribute__((always_inline)) notrace |
76 | #else |
76 | #else |
77 | /* A lot of inline functions can cause havoc with function tracing */ |
77 | /* A lot of inline functions can cause havoc with function tracing */ |
78 | #define inline inline notrace |
78 | #define inline inline notrace |
79 | #define __inline__ __inline__ notrace |
79 | #define __inline__ __inline__ notrace |
80 | #define __inline __inline notrace |
80 | #define __inline __inline notrace |
81 | #endif |
81 | #endif |
82 | 82 | ||
83 | #define __always_inline inline __attribute__((always_inline)) |
83 | #define __always_inline inline __attribute__((always_inline)) |
84 | #define noinline __attribute__((noinline)) |
84 | #define noinline __attribute__((noinline)) |
85 | 85 | ||
86 | #define __deprecated __attribute__((deprecated)) |
86 | #define __deprecated __attribute__((deprecated)) |
87 | #define __packed __attribute__((packed)) |
87 | #define __packed __attribute__((packed)) |
88 | #define __weak __attribute__((weak)) |
88 | #define __weak __attribute__((weak)) |
89 | #define __alias(symbol) __attribute__((alias(#symbol))) |
89 | #define __alias(symbol) __attribute__((alias(#symbol))) |
90 | 90 | ||
91 | /* |
91 | /* |
92 | * it doesn't make sense on ARM (currently the only user of __naked) |
92 | * it doesn't make sense on ARM (currently the only user of __naked) |
93 | * to trace naked functions because then mcount is called without |
93 | * to trace naked functions because then mcount is called without |
94 | * stack and frame pointer being set up and there is no chance to |
94 | * stack and frame pointer being set up and there is no chance to |
95 | * restore the lr register to the value before mcount was called. |
95 | * restore the lr register to the value before mcount was called. |
96 | * |
96 | * |
97 | * The asm() bodies of naked functions often depend on standard calling |
97 | * The asm() bodies of naked functions often depend on standard calling |
98 | * conventions, therefore they must be noinline and noclone. |
98 | * conventions, therefore they must be noinline and noclone. |
99 | * |
99 | * |
100 | * GCC 4.[56] currently fail to enforce this, so we must do so ourselves. |
100 | * GCC 4.[56] currently fail to enforce this, so we must do so ourselves. |
101 | * See GCC PR44290. |
101 | * See GCC PR44290. |
102 | */ |
102 | */ |
103 | #define __naked __attribute__((naked)) noinline __noclone notrace |
103 | #define __naked __attribute__((naked)) noinline __noclone notrace |
104 | 104 | ||
105 | #define __noreturn __attribute__((noreturn)) |
105 | #define __noreturn __attribute__((noreturn)) |
106 | 106 | ||
107 | /* |
107 | /* |
108 | * From the GCC manual: |
108 | * From the GCC manual: |
109 | * |
109 | * |
110 | * Many functions have no effects except the return value and their |
110 | * Many functions have no effects except the return value and their |
111 | * return value depends only on the parameters and/or global |
111 | * return value depends only on the parameters and/or global |
112 | * variables. Such a function can be subject to common subexpression |
112 | * variables. Such a function can be subject to common subexpression |
113 | * elimination and loop optimization just as an arithmetic operator |
113 | * elimination and loop optimization just as an arithmetic operator |
114 | * would be. |
114 | * would be. |
115 | * [...] |
115 | * [...] |
116 | */ |
116 | */ |
117 | #define __pure __attribute__((pure)) |
117 | #define __pure __attribute__((pure)) |
118 | #define __aligned(x) __attribute__((aligned(x))) |
118 | #define __aligned(x) __attribute__((aligned(x))) |
119 | #define __printf(a, b) __attribute__((format(printf, a, b))) |
119 | #define __printf(a, b) __attribute__((format(printf, a, b))) |
120 | #define __scanf(a, b) __attribute__((format(scanf, a, b))) |
120 | #define __scanf(a, b) __attribute__((format(scanf, a, b))) |
121 | #define __attribute_const__ __attribute__((__const__)) |
121 | #define __attribute_const__ __attribute__((__const__)) |
122 | #define __maybe_unused __attribute__((unused)) |
122 | #define __maybe_unused __attribute__((unused)) |
123 | #define __always_unused __attribute__((unused)) |
123 | #define __always_unused __attribute__((unused)) |
124 | 124 | ||
125 | /* gcc version specific checks */ |
125 | /* gcc version specific checks */ |
126 | 126 | ||
127 | #if GCC_VERSION < 30200 |
127 | #if GCC_VERSION < 30200 |
128 | # error Sorry, your compiler is too old - please upgrade it. |
128 | # error Sorry, your compiler is too old - please upgrade it. |
129 | #endif |
129 | #endif |
130 | 130 | ||
131 | #if GCC_VERSION < 30300 |
131 | #if GCC_VERSION < 30300 |
132 | # define __used __attribute__((__unused__)) |
132 | # define __used __attribute__((__unused__)) |
133 | #else |
133 | #else |
134 | # define __used __attribute__((__used__)) |
134 | # define __used __attribute__((__used__)) |
135 | #endif |
135 | #endif |
136 | 136 | ||
137 | #ifdef CONFIG_GCOV_KERNEL |
137 | #ifdef CONFIG_GCOV_KERNEL |
138 | # if GCC_VERSION < 30400 |
138 | # if GCC_VERSION < 30400 |
139 | # error "GCOV profiling support for gcc versions below 3.4 not included" |
139 | # error "GCOV profiling support for gcc versions below 3.4 not included" |
140 | # endif /* __GNUC_MINOR__ */ |
140 | # endif /* __GNUC_MINOR__ */ |
141 | #endif /* CONFIG_GCOV_KERNEL */ |
141 | #endif /* CONFIG_GCOV_KERNEL */ |
142 | 142 | ||
143 | #if GCC_VERSION >= 30400 |
143 | #if GCC_VERSION >= 30400 |
144 | #define __must_check __attribute__((warn_unused_result)) |
144 | #define __must_check __attribute__((warn_unused_result)) |
145 | #endif |
145 | #endif |
146 | 146 | ||
147 | #if GCC_VERSION >= 40000 |
147 | #if GCC_VERSION >= 40000 |
148 | 148 | ||
149 | /* GCC 4.1.[01] miscompiles __weak */ |
149 | /* GCC 4.1.[01] miscompiles __weak */ |
150 | #ifdef __KERNEL__ |
150 | #ifdef __KERNEL__ |
151 | # if GCC_VERSION >= 40100 && GCC_VERSION <= 40101 |
151 | # if GCC_VERSION >= 40100 && GCC_VERSION <= 40101 |
152 | # error Your version of gcc miscompiles the __weak directive |
152 | # error Your version of gcc miscompiles the __weak directive |
153 | # endif |
153 | # endif |
154 | #endif |
154 | #endif |
155 | 155 | ||
156 | #define __used __attribute__((__used__)) |
156 | #define __used __attribute__((__used__)) |
157 | #define __compiler_offsetof(a, b) \ |
157 | #define __compiler_offsetof(a, b) \ |
158 | __builtin_offsetof(a, b) |
158 | __builtin_offsetof(a, b) |
159 | 159 | ||
160 | #if GCC_VERSION >= 40100 && GCC_VERSION < 40600 |
160 | #if GCC_VERSION >= 40100 && GCC_VERSION < 40600 |
161 | # define __compiletime_object_size(obj) __builtin_object_size(obj, 0) |
161 | # define __compiletime_object_size(obj) __builtin_object_size(obj, 0) |
162 | #endif |
162 | #endif |
163 | 163 | ||
164 | #if GCC_VERSION >= 40300 |
164 | #if GCC_VERSION >= 40300 |
165 | /* Mark functions as cold. gcc will assume any path leading to a call |
165 | /* Mark functions as cold. gcc will assume any path leading to a call |
166 | * to them will be unlikely. This means a lot of manual unlikely()s |
166 | * to them will be unlikely. This means a lot of manual unlikely()s |
167 | * are unnecessary now for any paths leading to the usual suspects |
167 | * are unnecessary now for any paths leading to the usual suspects |
168 | * like BUG(), printk(), panic() etc. [but let's keep them for now for |
168 | * like BUG(), printk(), panic() etc. [but let's keep them for now for |
169 | * older compilers] |
169 | * older compilers] |
170 | * |
170 | * |
171 | * Early snapshots of gcc 4.3 don't support this and we can't detect this |
171 | * Early snapshots of gcc 4.3 don't support this and we can't detect this |
172 | * in the preprocessor, but we can live with this because they're unreleased. |
172 | * in the preprocessor, but we can live with this because they're unreleased. |
173 | * Maketime probing would be overkill here. |
173 | * Maketime probing would be overkill here. |
174 | * |
174 | * |
175 | * gcc also has a __attribute__((__hot__)) to move hot functions into |
175 | * gcc also has a __attribute__((__hot__)) to move hot functions into |
176 | * a special section, but I don't see any sense in this right now in |
176 | * a special section, but I don't see any sense in this right now in |
177 | * the kernel context |
177 | * the kernel context |
178 | */ |
178 | */ |
179 | #define __cold __attribute__((__cold__)) |
179 | #define __cold __attribute__((__cold__)) |
180 | 180 | ||
181 | #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__) |
181 | #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__) |
182 | 182 | ||
183 | #ifndef __CHECKER__ |
183 | #ifndef __CHECKER__ |
184 | # define __compiletime_warning(message) __attribute__((warning(message))) |
184 | # define __compiletime_warning(message) __attribute__((warning(message))) |
185 | # define __compiletime_error(message) __attribute__((error(message))) |
185 | # define __compiletime_error(message) __attribute__((error(message))) |
186 | #endif /* __CHECKER__ */ |
186 | #endif /* __CHECKER__ */ |
187 | #endif /* GCC_VERSION >= 40300 */ |
187 | #endif /* GCC_VERSION >= 40300 */ |
188 | 188 | ||
189 | #if GCC_VERSION >= 40500 |
189 | #if GCC_VERSION >= 40500 |
190 | /* |
190 | /* |
191 | * Mark a position in code as unreachable. This can be used to |
191 | * Mark a position in code as unreachable. This can be used to |
192 | * suppress control flow warnings after asm blocks that transfer |
192 | * suppress control flow warnings after asm blocks that transfer |
193 | * control elsewhere. |
193 | * control elsewhere. |
194 | * |
194 | * |
195 | * Early snapshots of gcc 4.5 don't support this and we can't detect |
195 | * Early snapshots of gcc 4.5 don't support this and we can't detect |
196 | * this in the preprocessor, but we can live with this because they're |
196 | * this in the preprocessor, but we can live with this because they're |
197 | * unreleased. Really, we need to have autoconf for the kernel. |
197 | * unreleased. Really, we need to have autoconf for the kernel. |
198 | */ |
198 | */ |
199 | #define unreachable() __builtin_unreachable() |
199 | #define unreachable() __builtin_unreachable() |
200 | 200 | ||
201 | /* Mark a function definition as prohibited from being cloned. */ |
201 | /* Mark a function definition as prohibited from being cloned. */ |
202 | #define __noclone __attribute__((__noclone__, __optimize__("no-tracer"))) |
202 | #define __noclone __attribute__((__noclone__, __optimize__("no-tracer"))) |
203 | 203 | ||
204 | #endif /* GCC_VERSION >= 40500 */ |
204 | #endif /* GCC_VERSION >= 40500 */ |
205 | 205 | ||
206 | #if GCC_VERSION >= 40600 |
206 | #if GCC_VERSION >= 40600 |
207 | /* |
207 | /* |
208 | * When used with Link Time Optimization, gcc can optimize away C functions or |
208 | * When used with Link Time Optimization, gcc can optimize away C functions or |
209 | * variables which are referenced only from assembly code. __visible tells the |
209 | * variables which are referenced only from assembly code. __visible tells the |
210 | * optimizer that something else uses this function or variable, thus preventing |
210 | * optimizer that something else uses this function or variable, thus preventing |
211 | * this. |
211 | * this. |
212 | */ |
212 | */ |
213 | #define __visible __attribute__((externally_visible)) |
213 | #define __visible __attribute__((externally_visible)) |
214 | #endif |
214 | #endif |
215 | 215 | ||
216 | 216 | ||
217 | #if GCC_VERSION >= 40900 && !defined(__CHECKER__) |
217 | #if GCC_VERSION >= 40900 && !defined(__CHECKER__) |
218 | /* |
218 | /* |
219 | * __assume_aligned(n, k): Tell the optimizer that the returned |
219 | * __assume_aligned(n, k): Tell the optimizer that the returned |
220 | * pointer can be assumed to be k modulo n. The second argument is |
220 | * pointer can be assumed to be k modulo n. The second argument is |
221 | * optional (default 0), so we use a variadic macro to make the |
221 | * optional (default 0), so we use a variadic macro to make the |
222 | * shorthand. |
222 | * shorthand. |
223 | * |
223 | * |
224 | * Beware: Do not apply this to functions which may return |
224 | * Beware: Do not apply this to functions which may return |
225 | * ERR_PTRs. Also, it is probably unwise to apply it to functions |
225 | * ERR_PTRs. Also, it is probably unwise to apply it to functions |
226 | * returning extra information in the low bits (but in that case the |
226 | * returning extra information in the low bits (but in that case the |
227 | * compiler should see some alignment anyway, when the return value is |
227 | * compiler should see some alignment anyway, when the return value is |
228 | * massaged by 'flags = ptr & 3; ptr &= ~3;'). |
228 | * massaged by 'flags = ptr & 3; ptr &= ~3;'). |
229 | */ |
229 | */ |
230 | #define __assume_aligned(a, ...) __attribute__((__assume_aligned__(a, ## __VA_ARGS__))) |
230 | #define __assume_aligned(a, ...) __attribute__((__assume_aligned__(a, ## __VA_ARGS__))) |
231 | #endif |
231 | #endif |
232 | 232 | ||
233 | /* |
233 | /* |
234 | * GCC 'asm goto' miscompiles certain code sequences: |
234 | * GCC 'asm goto' miscompiles certain code sequences: |
235 | * |
235 | * |
236 | * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670 |
236 | * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670 |
237 | * |
237 | * |
238 | * Work it around via a compiler barrier quirk suggested by Jakub Jelinek. |
238 | * Work it around via a compiler barrier quirk suggested by Jakub Jelinek. |
239 | * |
239 | * |
240 | * (asm goto is automatically volatile - the naming reflects this.) |
240 | * (asm goto is automatically volatile - the naming reflects this.) |
241 | */ |
241 | */ |
242 | #define asm_volatile_goto(x...) do { asm goto(x); asm (""); } while (0) |
242 | #define asm_volatile_goto(x...) do { asm goto(x); asm (""); } while (0) |
243 | 243 | ||
244 | #ifdef CONFIG_ARCH_USE_BUILTIN_BSWAP |
244 | #ifdef CONFIG_ARCH_USE_BUILTIN_BSWAP |
245 | #if GCC_VERSION >= 40400 |
245 | #if GCC_VERSION >= 40400 |
246 | #define __HAVE_BUILTIN_BSWAP32__ |
246 | #define __HAVE_BUILTIN_BSWAP32__ |
247 | #define __HAVE_BUILTIN_BSWAP64__ |
247 | #define __HAVE_BUILTIN_BSWAP64__ |
248 | #endif |
248 | #endif |
249 | #if GCC_VERSION >= 40800 || (defined(__powerpc__) && GCC_VERSION >= 40600) |
249 | #if GCC_VERSION >= 40800 || (defined(__powerpc__) && GCC_VERSION >= 40600) |
250 | #define __HAVE_BUILTIN_BSWAP16__ |
250 | #define __HAVE_BUILTIN_BSWAP16__ |
251 | #endif |
251 | #endif |
252 | #endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */ |
252 | #endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */ |
253 | 253 | ||
- | 254 | #if GCC_VERSION >= 70000 |
|
- | 255 | #define KASAN_ABI_VERSION 5 |
|
254 | #if GCC_VERSION >= 50000 |
256 | #elif GCC_VERSION >= 50000 |
255 | #define KASAN_ABI_VERSION 4 |
257 | #define KASAN_ABI_VERSION 4 |
256 | #elif GCC_VERSION >= 40902 |
258 | #elif GCC_VERSION >= 40902 |
257 | #define KASAN_ABI_VERSION 3 |
259 | #define KASAN_ABI_VERSION 3 |
258 | #endif |
260 | #endif |
259 | 261 | ||
260 | #if GCC_VERSION >= 40902 |
262 | #if GCC_VERSION >= 40902 |
261 | /* |
263 | /* |
262 | * Tell the compiler that address safety instrumentation (KASAN) |
264 | * Tell the compiler that address safety instrumentation (KASAN) |
263 | * should not be applied to that function. |
265 | * should not be applied to that function. |
264 | * Conflicts with inlining: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67368 |
266 | * Conflicts with inlining: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67368 |
265 | */ |
267 | */ |
266 | #define __no_sanitize_address __attribute__((no_sanitize_address)) |
268 | #define __no_sanitize_address __attribute__((no_sanitize_address)) |
267 | #endif |
269 | #endif |
268 | 270 | ||
269 | #endif /* gcc version >= 40000 specific checks */ |
271 | #endif /* gcc version >= 40000 specific checks */ |
270 | 272 | ||
271 | #if !defined(__noclone) |
273 | #if !defined(__noclone) |
272 | #define __noclone /* not needed */ |
274 | #define __noclone /* not needed */ |
273 | #endif |
275 | #endif |
274 | 276 | ||
275 | #if !defined(__no_sanitize_address) |
277 | #if !defined(__no_sanitize_address) |
276 | #define __no_sanitize_address |
278 | #define __no_sanitize_address |
277 | #endif |
279 | #endif |
278 | 280 | ||
279 | /* |
281 | /* |
280 | * A trick to suppress uninitialized variable warning without generating any |
282 | * A trick to suppress uninitialized variable warning without generating any |
281 | * code |
283 | * code |
282 | */ |
284 | */ |
283 | #define uninitialized_var(x) x = x>=>>>>> |
285 | #define uninitialized_var(x) x = x>=>>>>> |