Linux/include/linux/linkage.h

Version: ~ [ linux-6.12-rc7 ] ~ [ linux-6.11.7 ] ~ [ linux-6.10.14 ] ~ [ linux-6.9.12 ] ~ [ linux-6.8.12 ] ~ [ linux-6.7.12 ] ~ [ linux-6.6.60 ] ~ [ linux-6.5.13 ] ~ [ linux-6.4.16 ] ~ [ linux-6.3.13 ] ~ [ linux-6.2.16 ] ~ [ linux-6.1.116 ] ~ [ linux-6.0.19 ] ~ [ linux-5.19.17 ] ~ [ linux-5.18.19 ] ~ [ linux-5.17.15 ] ~ [ linux-5.16.20 ] ~ [ linux-5.15.171 ] ~ [ linux-5.14.21 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.229 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.285 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.323 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.336 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.337 ] ~ [ linux-4.4.302 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.12 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

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1 /* SPDX-License-Identifier: GPL-2.0 */ 1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _LINUX_LINKAGE_H 2 #ifndef _LINUX_LINKAGE_H 3 #define _LINUX_LINKAGE_H 3 #define _LINUX_LINKAGE_H 4 4 5 #include <linux/compiler_types.h> 5 #include <linux/compiler_types.h> 6 #include <linux/stringify.h> 6 #include <linux/stringify.h> 7 #include <linux/export.h> 7 #include <linux/export.h> 8 #include <asm/linkage.h> 8 #include <asm/linkage.h> 9 9 10 /* Some toolchains use other characters (e.g. 10 /* Some toolchains use other characters (e.g. '`') to mark new line in macro */ 11 #ifndef ASM_NL 11 #ifndef ASM_NL 12 #define ASM_NL ; 12 #define ASM_NL ; 13 #endif 13 #endif 14 14 15 #ifdef __cplusplus 15 #ifdef __cplusplus 16 #define CPP_ASMLINKAGE extern "C" 16 #define CPP_ASMLINKAGE extern "C" 17 #else 17 #else 18 #define CPP_ASMLINKAGE 18 #define CPP_ASMLINKAGE 19 #endif 19 #endif 20 20 21 #ifndef asmlinkage 21 #ifndef asmlinkage 22 #define asmlinkage CPP_ASMLINKAGE 22 #define asmlinkage CPP_ASMLINKAGE 23 #endif 23 #endif 24 24 25 #ifndef cond_syscall 25 #ifndef cond_syscall 26 #define cond_syscall(x) asm( 26 #define cond_syscall(x) asm( \ 27 ".weak " __stringify(x) "\n\t" !! 27 ".weak " VMLINUX_SYMBOL_STR(x) "\n\t" \ 28 ".set " __stringify(x) "," !! 28 ".set " VMLINUX_SYMBOL_STR(x) "," \ 29 __stringify(sys_ni_syscall)) !! 29 VMLINUX_SYMBOL_STR(sys_ni_syscall)) 30 #endif 30 #endif 31 31 32 #ifndef SYSCALL_ALIAS 32 #ifndef SYSCALL_ALIAS 33 #define SYSCALL_ALIAS(alias, name) asm( 33 #define SYSCALL_ALIAS(alias, name) asm( \ 34 ".globl " __stringify(alias) "\n\t" !! 34 ".globl " VMLINUX_SYMBOL_STR(alias) "\n\t" \ 35 ".set " __stringify(alias) "," !! 35 ".set " VMLINUX_SYMBOL_STR(alias) "," \ 36 __stringify(name)) !! 36 VMLINUX_SYMBOL_STR(name)) 37 #endif 37 #endif 38 38 39 #define __page_aligned_data __section(".da !! 39 #define __page_aligned_data __section(.data..page_aligned) __aligned(PAGE_SIZE) 40 #define __page_aligned_bss __section(".bs !! 40 #define __page_aligned_bss __section(.bss..page_aligned) __aligned(PAGE_SIZE) 41 41 42 /* 42 /* 43 * For assembly routines. 43 * For assembly routines. 44 * 44 * 45 * Note when using these that you must specify 45 * Note when using these that you must specify the appropriate 46 * alignment directives yourself 46 * alignment directives yourself 47 */ 47 */ 48 #define __PAGE_ALIGNED_DATA .section ".dat 48 #define __PAGE_ALIGNED_DATA .section ".data..page_aligned", "aw" 49 #define __PAGE_ALIGNED_BSS .section ".bss 49 #define __PAGE_ALIGNED_BSS .section ".bss..page_aligned", "aw" 50 50 51 /* 51 /* 52 * This is used by architectures to keep argum 52 * This is used by architectures to keep arguments on the stack 53 * untouched by the compiler by keeping them l 53 * untouched by the compiler by keeping them live until the end. 54 * The argument stack may be owned by the asse 54 * The argument stack may be owned by the assembly-language 55 * caller, not the callee, and gcc doesn't alw 55 * caller, not the callee, and gcc doesn't always understand 56 * that. 56 * that. 57 * 57 * 58 * We have the return value, and a maximum of 58 * We have the return value, and a maximum of six arguments. 59 * 59 * 60 * This should always be followed by a "return 60 * This should always be followed by a "return ret" for the 61 * protection to work (ie no more work that th 61 * protection to work (ie no more work that the compiler might 62 * end up needing stack temporaries for). 62 * end up needing stack temporaries for). 63 */ 63 */ 64 /* Assembly files may be compiled with -tradit 64 /* Assembly files may be compiled with -traditional .. */ 65 #ifndef __ASSEMBLY__ 65 #ifndef __ASSEMBLY__ 66 #ifndef asmlinkage_protect 66 #ifndef asmlinkage_protect 67 # define asmlinkage_protect(n, ret, args...) 67 # define asmlinkage_protect(n, ret, args...) do { } while (0) 68 #endif 68 #endif 69 #endif 69 #endif 70 70 71 #ifndef __ALIGN 71 #ifndef __ALIGN 72 #define __ALIGN .balign CONFIG !! 72 #define __ALIGN .align 4,0x90 73 #define __ALIGN_STR __stringify(__ !! 73 #define __ALIGN_STR ".align 4,0x90" 74 #endif 74 #endif 75 75 76 #ifdef __ASSEMBLY__ 76 #ifdef __ASSEMBLY__ 77 77 78 /* SYM_T_FUNC -- type used by assembler to mar << 79 #ifndef SYM_T_FUNC << 80 #define SYM_T_FUNC << 81 #endif << 82 << 83 /* SYM_T_OBJECT -- type used by assembler to m << 84 #ifndef SYM_T_OBJECT << 85 #define SYM_T_OBJECT << 86 #endif << 87 << 88 /* SYM_T_NONE -- type used by assembler to mar << 89 #ifndef SYM_T_NONE << 90 #define SYM_T_NONE << 91 #endif << 92 << 93 /* SYM_A_* -- align the symbol? */ << 94 #define SYM_A_ALIGN << 95 #define SYM_A_NONE << 96 << 97 /* SYM_L_* -- linkage of symbols */ << 98 #define SYM_L_GLOBAL(name) << 99 #define SYM_L_WEAK(name) << 100 #define SYM_L_LOCAL(name) << 101 << 102 #ifndef LINKER_SCRIPT 78 #ifndef LINKER_SCRIPT 103 #define ALIGN __ALIGN 79 #define ALIGN __ALIGN 104 #define ALIGN_STR __ALIGN_STR 80 #define ALIGN_STR __ALIGN_STR 105 81 106 /* === DEPRECATED annotations === */ << 107 << 108 #ifndef CONFIG_ARCH_USE_SYM_ANNOTATIONS << 109 #ifndef GLOBAL << 110 /* deprecated, use SYM_DATA*, SYM_ENTRY, or si << 111 #define GLOBAL(name) \ << 112 .globl name ASM_NL \ << 113 name: << 114 #endif << 115 << 116 #ifndef ENTRY 82 #ifndef ENTRY 117 /* deprecated, use SYM_FUNC_START */ << 118 #define ENTRY(name) \ 83 #define ENTRY(name) \ 119 SYM_FUNC_START(name) !! 84 .globl name ASM_NL \ >> 85 ALIGN ASM_NL \ >> 86 name: 120 #endif 87 #endif 121 #endif /* CONFIG_ARCH_USE_SYM_ANNOTATIONS */ << 122 #endif /* LINKER_SCRIPT */ 88 #endif /* LINKER_SCRIPT */ 123 89 124 #ifndef CONFIG_ARCH_USE_SYM_ANNOTATIONS << 125 #ifndef WEAK 90 #ifndef WEAK 126 /* deprecated, use SYM_FUNC_START_WEAK* */ << 127 #define WEAK(name) \ 91 #define WEAK(name) \ 128 SYM_FUNC_START_WEAK(name) !! 92 .weak name ASM_NL \ >> 93 name: 129 #endif 94 #endif 130 95 131 #ifndef END 96 #ifndef END 132 /* deprecated, use SYM_FUNC_END, SYM_DATA_END, << 133 #define END(name) \ 97 #define END(name) \ 134 .size name, .-name 98 .size name, .-name 135 #endif 99 #endif 136 100 137 /* If symbol 'name' is treated as a subroutine 101 /* If symbol 'name' is treated as a subroutine (gets called, and returns) 138 * then please use ENDPROC to mark 'name' as S 102 * then please use ENDPROC to mark 'name' as STT_FUNC for the benefit of 139 * static analysis tools such as stack depth a 103 * static analysis tools such as stack depth analyzer. 140 */ 104 */ 141 #ifndef ENDPROC 105 #ifndef ENDPROC 142 /* deprecated, use SYM_FUNC_END */ << 143 #define ENDPROC(name) \ 106 #define ENDPROC(name) \ 144 SYM_FUNC_END(name) !! 107 .type name, @function ASM_NL \ 145 #endif !! 108 END(name) 146 #endif /* CONFIG_ARCH_USE_SYM_ANNOTATIONS */ << 147 << 148 /* === generic annotations === */ << 149 << 150 /* SYM_ENTRY -- use only if you have to for no << 151 #ifndef SYM_ENTRY << 152 #define SYM_ENTRY(name, linkage, align...) << 153 linkage(name) ASM_NL << 154 align ASM_NL << 155 name: << 156 #endif << 157 << 158 /* SYM_START -- use only if you have to */ << 159 #ifndef SYM_START << 160 #define SYM_START(name, linkage, align...) << 161 SYM_ENTRY(name, linkage, align) << 162 #endif << 163 << 164 /* SYM_END -- use only if you have to */ << 165 #ifndef SYM_END << 166 #define SYM_END(name, sym_type) << 167 .type name sym_type ASM_NL << 168 .set .L__sym_size_##name, .-name ASM_N << 169 .size name, .L__sym_size_##name << 170 #endif << 171 << 172 /* SYM_ALIAS -- use only if you have to */ << 173 #ifndef SYM_ALIAS << 174 #define SYM_ALIAS(alias, name, linkage) << 175 linkage(alias) ASM_NL << 176 .set alias, name ASM_NL << 177 #endif << 178 << 179 /* === code annotations === */ << 180 << 181 /* << 182 * FUNC -- C-like functions (proper stack fram << 183 * CODE -- non-C code (e.g. irq handlers with << 184 * << 185 * Objtool validates stack for FUNC, but not f << 186 * Objtool generates debug info for both FUNC << 187 * annotations for each CODE's start (to descr << 188 * << 189 * Objtool requires that all code must be cont << 190 * names that have a .L prefix do not emit sy << 191 * prefixed symbols can be used within a code << 192 * denoting a range of code via ``SYM_*_START/ << 193 * << 194 * ALIAS -- does not generate debug info -- th << 195 */ << 196 << 197 /* SYM_INNER_LABEL_ALIGN -- only for labels in << 198 #ifndef SYM_INNER_LABEL_ALIGN << 199 #define SYM_INNER_LABEL_ALIGN(name, linkage) << 200 .type name SYM_T_NONE ASM_NL << 201 SYM_ENTRY(name, linkage, SYM_A_ALIGN) << 202 #endif << 203 << 204 /* SYM_INNER_LABEL -- only for labels in the m << 205 #ifndef SYM_INNER_LABEL << 206 #define SYM_INNER_LABEL(name, linkage) << 207 .type name SYM_T_NONE ASM_NL << 208 SYM_ENTRY(name, linkage, SYM_A_NONE) << 209 #endif << 210 << 211 /* SYM_FUNC_START -- use for global functions << 212 #ifndef SYM_FUNC_START << 213 #define SYM_FUNC_START(name) << 214 SYM_START(name, SYM_L_GLOBAL, SYM_A_AL << 215 #endif << 216 << 217 /* SYM_FUNC_START_NOALIGN -- use for global fu << 218 #ifndef SYM_FUNC_START_NOALIGN << 219 #define SYM_FUNC_START_NOALIGN(name) << 220 SYM_START(name, SYM_L_GLOBAL, SYM_A_NO << 221 #endif << 222 << 223 /* SYM_FUNC_START_LOCAL -- use for local funct << 224 #ifndef SYM_FUNC_START_LOCAL << 225 #define SYM_FUNC_START_LOCAL(name) << 226 SYM_START(name, SYM_L_LOCAL, SYM_A_ALI << 227 #endif << 228 << 229 /* SYM_FUNC_START_LOCAL_NOALIGN -- use for loc << 230 #ifndef SYM_FUNC_START_LOCAL_NOALIGN << 231 #define SYM_FUNC_START_LOCAL_NOALIGN(name) << 232 SYM_START(name, SYM_L_LOCAL, SYM_A_NON << 233 #endif << 234 << 235 /* SYM_FUNC_START_WEAK -- use for weak functio << 236 #ifndef SYM_FUNC_START_WEAK << 237 #define SYM_FUNC_START_WEAK(name) << 238 SYM_START(name, SYM_L_WEAK, SYM_A_ALIG << 239 #endif << 240 << 241 /* SYM_FUNC_START_WEAK_NOALIGN -- use for weak << 242 #ifndef SYM_FUNC_START_WEAK_NOALIGN << 243 #define SYM_FUNC_START_WEAK_NOALIGN(name) << 244 SYM_START(name, SYM_L_WEAK, SYM_A_NONE << 245 #endif << 246 << 247 /* << 248 * SYM_FUNC_END -- the end of SYM_FUNC_START_L << 249 * SYM_FUNC_START_WEAK, ... << 250 */ << 251 #ifndef SYM_FUNC_END << 252 #define SYM_FUNC_END(name) << 253 SYM_END(name, SYM_T_FUNC) << 254 #endif << 255 << 256 /* << 257 * SYM_FUNC_ALIAS -- define a global alias for << 258 */ << 259 #ifndef SYM_FUNC_ALIAS << 260 #define SYM_FUNC_ALIAS(alias, name) << 261 SYM_ALIAS(alias, name, SYM_L_GLOBAL) << 262 #endif << 263 << 264 /* << 265 * SYM_FUNC_ALIAS_LOCAL -- define a local alia << 266 */ << 267 #ifndef SYM_FUNC_ALIAS_LOCAL << 268 #define SYM_FUNC_ALIAS_LOCAL(alias, name) << 269 SYM_ALIAS(alias, name, SYM_L_LOCAL) << 270 #endif << 271 << 272 /* << 273 * SYM_FUNC_ALIAS_WEAK -- define a weak global << 274 */ << 275 #ifndef SYM_FUNC_ALIAS_WEAK << 276 #define SYM_FUNC_ALIAS_WEAK(alias, name) << 277 SYM_ALIAS(alias, name, SYM_L_WEAK) << 278 #endif << 279 << 280 /* SYM_CODE_START -- use for non-C (special) f << 281 #ifndef SYM_CODE_START << 282 #define SYM_CODE_START(name) << 283 SYM_START(name, SYM_L_GLOBAL, SYM_A_AL << 284 #endif << 285 << 286 /* SYM_CODE_START_NOALIGN -- use for non-C (sp << 287 #ifndef SYM_CODE_START_NOALIGN << 288 #define SYM_CODE_START_NOALIGN(name) << 289 SYM_START(name, SYM_L_GLOBAL, SYM_A_NO << 290 #endif << 291 << 292 /* SYM_CODE_START_LOCAL -- use for local non-C << 293 #ifndef SYM_CODE_START_LOCAL << 294 #define SYM_CODE_START_LOCAL(name) << 295 SYM_START(name, SYM_L_LOCAL, SYM_A_ALI << 296 #endif << 297 << 298 /* << 299 * SYM_CODE_START_LOCAL_NOALIGN -- use for loc << 300 * w/o alignment << 301 */ << 302 #ifndef SYM_CODE_START_LOCAL_NOALIGN << 303 #define SYM_CODE_START_LOCAL_NOALIGN(name) << 304 SYM_START(name, SYM_L_LOCAL, SYM_A_NON << 305 #endif << 306 << 307 /* SYM_CODE_END -- the end of SYM_CODE_START_L << 308 #ifndef SYM_CODE_END << 309 #define SYM_CODE_END(name) << 310 SYM_END(name, SYM_T_NONE) << 311 #endif 109 #endif 312 110 313 /* === data annotations === */ << 314 << 315 /* SYM_DATA_START -- global data symbol */ << 316 #ifndef SYM_DATA_START << 317 #define SYM_DATA_START(name) << 318 SYM_START(name, SYM_L_GLOBAL, SYM_A_NO << 319 #endif << 320 << 321 /* SYM_DATA_START -- local data symbol */ << 322 #ifndef SYM_DATA_START_LOCAL << 323 #define SYM_DATA_START_LOCAL(name) << 324 SYM_START(name, SYM_L_LOCAL, SYM_A_NON << 325 #endif 111 #endif 326 112 327 /* SYM_DATA_END -- the end of SYM_DATA_START s << 328 #ifndef SYM_DATA_END << 329 #define SYM_DATA_END(name) << 330 SYM_END(name, SYM_T_OBJECT) << 331 #endif 113 #endif 332 << 333 /* SYM_DATA_END_LABEL -- the labeled end of SY << 334 #ifndef SYM_DATA_END_LABEL << 335 #define SYM_DATA_END_LABEL(name, linkage, labe << 336 linkage(label) ASM_NL << 337 .type label SYM_T_OBJECT ASM_NL << 338 label: << 339 SYM_END(name, SYM_T_OBJECT) << 340 #endif << 341 << 342 /* SYM_DATA -- start+end wrapper around simple << 343 #ifndef SYM_DATA << 344 #define SYM_DATA(name, data...) << 345 SYM_DATA_START(name) ASM_NL << 346 data ASM_NL << 347 SYM_DATA_END(name) << 348 #endif << 349 << 350 /* SYM_DATA_LOCAL -- start+end wrapper around << 351 #ifndef SYM_DATA_LOCAL << 352 #define SYM_DATA_LOCAL(name, data...) << 353 SYM_DATA_START_LOCAL(name) ASM_NL << 354 data ASM_NL << 355 SYM_DATA_END(name) << 356 #endif << 357 << 358 #endif /* __ASSEMBLY__ */ << 359 << 360 #endif /* _LINUX_LINKAGE_H */ << 361 114

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TOMOYO Linux Cross Reference
Linux/include/linux/linkage.h

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Differences between /include/linux/linkage.h (Version linux-6.12-rc7) and /include/linux/linkage.h (Version linux-4.14.336)

TOMOYO Linux Cross Reference Linux/include/linux/linkage.h

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Differences between /include/linux/linkage.h (Version linux-6.12-rc7) and /include/linux/linkage.h (Version linux-4.14.336)

TOMOYO Linux Cross Reference
Linux/include/linux/linkage.h