diff --git a/include/stdlib.h b/include/stdlib.h index c1c8ab5eebb3..db339688cb78 100644 --- a/include/stdlib.h +++ b/include/stdlib.h @@ -1,393 +1,396 @@ /*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1990, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef _STDLIB_H_ #define _STDLIB_H_ #include #include #include __NULLABILITY_PRAGMA_PUSH #ifndef _SIZE_T_DECLARED typedef __size_t size_t; #define _SIZE_T_DECLARED #endif #ifndef __cplusplus #ifndef _WCHAR_T_DECLARED typedef ___wchar_t wchar_t; #define _WCHAR_T_DECLARED #endif #endif typedef struct { int quot; /* quotient */ int rem; /* remainder */ } div_t; typedef struct { long quot; long rem; } ldiv_t; #define EXIT_FAILURE 1 #define EXIT_SUCCESS 0 /* * I.e., INT_MAX; rand(3) returns a signed integer but must produce output in * the range [0, RAND_MAX], so half of the possible output range is unused. */ #define RAND_MAX 0x7fffffff __BEGIN_DECLS #ifdef _XLOCALE_H_ #include #endif extern int __mb_cur_max; extern int ___mb_cur_max(void); #define MB_CUR_MAX ((size_t)___mb_cur_max()) _Noreturn void abort(void) __noexcept; int abs(int) __pure2; int atexit(void (* _Nonnull)(void)) __noexcept; double atof(const char *); int atoi(const char *); long atol(const char *); void *bsearch(const void *, const void *, size_t, size_t, int (*)(const void * _Nonnull, const void *)); void *calloc(size_t, size_t) __malloc_like __result_use_check __alloc_size2(1, 2); div_t div(int, int) __pure2; _Noreturn void exit(int); void free(void *); char *getenv(const char *); long labs(long) __pure2; ldiv_t ldiv(long, long) __pure2; void *malloc(size_t) __malloc_like __result_use_check __alloc_size(1); int mblen(const char *, size_t); size_t mbstowcs(wchar_t * __restrict , const char * __restrict, size_t); int mbtowc(wchar_t * __restrict, const char * __restrict, size_t); void qsort(void *, size_t, size_t, int (* _Nonnull)(const void *, const void *)); int rand(void); void *realloc(void *, size_t) __result_use_check __alloc_size(2); void srand(unsigned); double strtod(const char * __restrict, char ** __restrict); float strtof(const char * __restrict, char ** __restrict); long strtol(const char * __restrict, char ** __restrict, int); long double strtold(const char * __restrict, char ** __restrict); unsigned long strtoul(const char * __restrict, char ** __restrict, int); int system(const char *); int wctomb(char *, wchar_t); size_t wcstombs(char * __restrict, const wchar_t * __restrict, size_t); /* * Functions added in C99 which we make conditionally available in the * BSD^C89 namespace if the compiler supports `long long'. * The #if test is more complicated than it ought to be because * __BSD_VISIBLE implies __ISO_C_VISIBLE == 1999 *even if* `long long' * is not supported in the compilation environment (which therefore means * that it can't really be ISO C99). * * (The only other extension made by C99 in this header is _Exit().) */ #if __ISO_C_VISIBLE >= 1999 || defined(__cplusplus) #ifdef __LONG_LONG_SUPPORTED /* LONGLONG */ typedef struct { long long quot; long long rem; } lldiv_t; /* LONGLONG */ long long atoll(const char *); /* LONGLONG */ long long llabs(long long) __pure2; /* LONGLONG */ lldiv_t lldiv(long long, long long) __pure2; /* LONGLONG */ long long strtoll(const char * __restrict, char ** __restrict, int); /* LONGLONG */ unsigned long long strtoull(const char * __restrict, char ** __restrict, int); #endif /* __LONG_LONG_SUPPORTED */ _Noreturn void _Exit(int) __noexcept; #endif /* __ISO_C_VISIBLE >= 1999 */ /* * If we're in a mode greater than C99, expose C11 functions. */ #if __ISO_C_VISIBLE >= 2011 || __cplusplus >= 201103L void * aligned_alloc(size_t, size_t) __malloc_like __alloc_align(1) __alloc_size(2); int at_quick_exit(void (*)(void)) __noexcept; _Noreturn void quick_exit(int) /* __noexcept -- not ready ABI issues? */; #endif /* __ISO_C_VISIBLE >= 2011 */ /* * Extensions made by POSIX relative to C. */ #if __POSIX_VISIBLE >= 199506 || __XSI_VISIBLE char *realpath(const char * __restrict, char * __restrict); #endif #if __POSIX_VISIBLE >= 199506 int rand_r(unsigned *); /* (TSF) */ #endif #if __POSIX_VISIBLE >= 200112 int posix_memalign(void **, size_t, size_t); /* (ADV) */ int setenv(const char *, const char *, int); int unsetenv(const char *); #endif #if __POSIX_VISIBLE >= 200809 || __XSI_VISIBLE int getsubopt(char **, char *const *, char **); #ifndef _MKDTEMP_DECLARED char *mkdtemp(char *); #define _MKDTEMP_DECLARED #endif #ifndef _MKSTEMP_DECLARED int mkstemp(char *); #define _MKSTEMP_DECLARED #endif #endif /* __POSIX_VISIBLE >= 200809 || __XSI_VISIBLE */ /* * The only changes to the XSI namespace in revision 6 were the deletion * of the ttyslot() and valloc() functions, which FreeBSD never declared * in this header. For revision 7, ecvt(), fcvt(), and gcvt(), which * FreeBSD also does not have, and mktemp(), are to be deleted. */ #if __XSI_VISIBLE /* XXX XSI requires pollution from here. We'd rather not. */ long a64l(const char *); double drand48(void); /* char *ecvt(double, int, int * __restrict, int * __restrict); */ double erand48(unsigned short[3]); /* char *fcvt(double, int, int * __restrict, int * __restrict); */ /* char *gcvt(double, int, int * __restrict, int * __restrict); */ char *initstate(unsigned int, char *, size_t); long jrand48(unsigned short[3]); char *l64a(long); void lcong48(unsigned short[7]); long lrand48(void); #if !defined(_MKTEMP_DECLARED) && (__BSD_VISIBLE || __XSI_VISIBLE <= 600) char *mktemp(char *); #define _MKTEMP_DECLARED #endif long mrand48(void); long nrand48(unsigned short[3]); int putenv(char *); long random(void); unsigned short *seed48(unsigned short[3]); char *setstate(/* const */ char *); void srand48(long); void srandom(unsigned int); #endif /* __XSI_VISIBLE */ #if __XSI_VISIBLE int grantpt(int); int posix_openpt(int); char *ptsname(int); int unlockpt(int); #endif /* __XSI_VISIBLE */ #if __BSD_VISIBLE /* ptsname_r will be included in POSIX issue 8 */ int ptsname_r(int, char *, size_t); #endif #if __BSD_VISIBLE extern const char *malloc_conf; extern void (*malloc_message)(void *, const char *); /* * The alloca() function can't be implemented in C, and on some * platforms it can't be implemented at all as a callable function. * The GNU C compiler provides a built-in alloca() which we can use. * On platforms where alloca() is not in libc, programs which use it * will fail to link when compiled with non-GNU compilers. */ #if __GNUC__ >= 2 #undef alloca /* some GNU bits try to get cute and define this on their own */ #define alloca(sz) __builtin_alloca(sz) #endif void abort2(const char *, int, void **) __dead2; __uint32_t arc4random(void); void arc4random_buf(void *, size_t); __uint32_t arc4random_uniform(__uint32_t); #ifdef __BLOCKS__ int atexit_b(void (^ _Nonnull)(void)); void *bsearch_b(const void *, const void *, size_t, size_t, int (^ _Nonnull)(const void *, const void *)); #endif char *getbsize(int *, long *); /* getcap(3) functions */ char *cgetcap(char *, const char *, int); int cgetclose(void); int cgetent(char **, char **, const char *); int cgetfirst(char **, char **); int cgetmatch(const char *, const char *); int cgetnext(char **, char **); int cgetnum(char *, const char *, long *); int cgetset(const char *); int cgetstr(char *, const char *, char **); int cgetustr(char *, const char *, char **); int clearenv(void); int daemon(int, int); int daemonfd(int, int); char *devname(__dev_t, __mode_t); char *devname_r(__dev_t, __mode_t, char *, int); char *fdevname(int); char *fdevname_r(int, char *, int); int getloadavg(double [], int); const char * getprogname(void); int heapsort(void *, size_t, size_t, int (* _Nonnull)(const void *, const void *)); #ifdef __BLOCKS__ int heapsort_b(void *, size_t, size_t, int (^ _Nonnull)(const void *, const void *)); void qsort_b(void *, size_t, size_t, int (^ _Nonnull)(const void *, const void *)); #endif int l64a_r(long, char *, int); int mergesort(void *, size_t, size_t, int (*)(const void *, const void *)); #ifdef __BLOCKS__ int mergesort_b(void *, size_t, size_t, int (^)(const void *, const void *)); #endif int mkostemp(char *, int); int mkostemps(char *, int, int); int mkostempsat(int, char *, int, int); void qsort_r(void *, size_t, size_t, int (*)(const void *, const void *, void *), void *); int radixsort(const unsigned char **, int, const unsigned char *, unsigned); void *reallocarray(void *, size_t, size_t) __result_use_check __alloc_size2(2, 3); void *reallocf(void *, size_t) __result_use_check __alloc_size(2); int rpmatch(const char *); char *secure_getenv(const char *); void setprogname(const char *); int sradixsort(const unsigned char **, int, const unsigned char *, unsigned); void srandomdev(void); long long strtonum(const char *, long long, long long, const char **); /* Deprecated interfaces, to be removed. */ __int64_t strtoq(const char *, char **, int); __uint64_t strtouq(const char *, char **, int); /* * In FreeBSD 14, the prototype of qsort_r() was modified to comply with * POSIX. The standardized qsort_r()'s order of last two parameters was * changed, and the comparator function is now taking thunk as its last * parameter, and both are different from the ones expected by the historical * FreeBSD qsort_r() interface. * - * Apply a workaround where we explicitly link against the historical - * interface, qsort_r@FBSD_1.0, in case when qsort_r() is called with - * the last parameter with a function pointer that exactly matches the - * historical FreeBSD qsort_r() comparator signature, so applications - * written for the historical interface can continue to work without - * modification. + * Apply a workaround where we explicitly link against the historical interface, + * qsort_r@FBSD_1.0, in case when qsort_r() is called with the last parameter + * with a function pointer that exactly matches the historical FreeBSD qsort_r() + * comparator signature, so applications written for the historical interface + * can continue to work without modification. Toolchains that don't support + * symbol versioning don't define __sym_compat, so only provide this symbol in + * supported environments. */ +#ifdef __sym_compat #if defined(__generic) || defined(__cplusplus) void __qsort_r_compat(void *, size_t, size_t, void *, int (*)(void *, const void *, const void *)); __sym_compat(qsort_r, __qsort_r_compat, FBSD_1.0); #endif +#endif #if defined(__generic) && !defined(__cplusplus) #define qsort_r(base, nel, width, arg4, arg5) \ __generic(arg5, int (*)(void *, const void *, const void *), \ __qsort_r_compat, qsort_r)(base, nel, width, arg4, arg5) -#elif defined(__cplusplus) +#elif defined(__cplusplus) && defined(__sym_compat) __END_DECLS extern "C++" { static inline void qsort_r(void *base, size_t nmemb, size_t size, void *thunk, int (*compar)(void *, const void *, const void *)) { __qsort_r_compat(base, nmemb, size, thunk, compar); } } __BEGIN_DECLS #endif extern char *suboptarg; /* getsubopt(3) external variable */ #endif /* __BSD_VISIBLE */ #if __EXT1_VISIBLE #ifndef _RSIZE_T_DEFINED #define _RSIZE_T_DEFINED typedef size_t rsize_t; #endif #ifndef _ERRNO_T_DEFINED #define _ERRNO_T_DEFINED typedef int errno_t; #endif /* K.3.6 */ typedef void (*constraint_handler_t)(const char * __restrict, void * __restrict, errno_t); /* K.3.6.1.1 */ constraint_handler_t set_constraint_handler_s(constraint_handler_t handler); /* K.3.6.1.2 */ _Noreturn void abort_handler_s(const char * __restrict, void * __restrict, errno_t); /* K3.6.1.3 */ void ignore_handler_s(const char * __restrict, void * __restrict, errno_t); /* K.3.6.3.2 */ errno_t qsort_s(void *, rsize_t, rsize_t, int (*)(const void *, const void *, void *), void *); #endif /* __EXT1_VISIBLE */ __END_DECLS __NULLABILITY_PRAGMA_POP #endif /* !_STDLIB_H_ */ diff --git a/sys/sys/cdefs.h b/sys/sys/cdefs.h index 43d179b82020..419fc260f200 100644 --- a/sys/sys/cdefs.h +++ b/sys/sys/cdefs.h @@ -1,759 +1,772 @@ /*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1991, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Berkeley Software Design, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef _SYS_CDEFS_H_ #define _SYS_CDEFS_H_ #if defined(_KERNEL) && defined(_STANDALONE) #error "_KERNEL and _STANDALONE are mutually exclusive" #endif /* * Testing against Clang-specific extensions. */ #ifndef __has_attribute #define __has_attribute(x) 0 #endif #ifndef __has_extension #define __has_extension __has_feature #endif #ifndef __has_feature #define __has_feature(x) 0 #endif #ifndef __has_include #define __has_include(x) 0 #endif #ifndef __has_builtin #define __has_builtin(x) 0 #endif #if defined(__cplusplus) #define __BEGIN_DECLS extern "C" { #define __END_DECLS } #else #define __BEGIN_DECLS #define __END_DECLS #endif /* * This code has been put in place to help reduce the addition of * compiler specific defines in FreeBSD code. It helps to aid in * having a compiler-agnostic source tree. */ /* * Macro to test if we're using a specific version of gcc or later. */ #if defined(__GNUC__) #define __GNUC_PREREQ__(ma, mi) \ (__GNUC__ > (ma) || __GNUC__ == (ma) && __GNUC_MINOR__ >= (mi)) #else #define __GNUC_PREREQ__(ma, mi) 0 #endif #if defined(__GNUC__) /* * Compiler memory barriers, specific to gcc and clang. */ #define __compiler_membar() __asm __volatile(" " : : : "memory") #define __CC_SUPPORTS___INLINE 1 +#define __CC_SUPPORTS_SYMVER 1 #endif /* __GNUC__ */ +/* + * TinyC pretends to be gcc 9.3. This is generally good enough to support + * everything FreeBSD... except for the .symver assembler directive. + */ +#ifdef __TINYC__ +#undef __CC_SUPPORTS_SYMVER +#endif + /* * The __CONCAT macro is used to concatenate parts of symbol names, e.g. * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo. * The __CONCAT macro is a bit tricky to use if it must work in non-ANSI * mode -- there must be no spaces between its arguments, and for nested * __CONCAT's, all the __CONCAT's must be at the left. __CONCAT can also * concatenate double-quoted strings produced by the __STRING macro, but * this only works with ANSI C. * * __XSTRING is like __STRING, but it expands any macros in its argument * first. It is only available with ANSI C. */ #if defined(__STDC__) || defined(__cplusplus) #define __P(protos) protos /* full-blown ANSI C */ #define __CONCAT1(x,y) x ## y #define __CONCAT(x,y) __CONCAT1(x,y) #define __STRING(x) #x /* stringify without expanding x */ #define __XSTRING(x) __STRING(x) /* expand x, then stringify */ #define __const const /* define reserved names to standard */ #define __signed signed #define __volatile volatile #if defined(__cplusplus) #define __inline inline /* convert to C++ keyword */ #else #if !(defined(__CC_SUPPORTS___INLINE)) #define __inline /* delete GCC keyword */ #endif /* ! __CC_SUPPORTS___INLINE */ #endif /* !__cplusplus */ #else /* !(__STDC__ || __cplusplus) */ #define __P(protos) () /* traditional C preprocessor */ #define __CONCAT(x,y) x/**/y #define __STRING(x) "x" #if !defined(__CC_SUPPORTS___INLINE) #define __const /* delete pseudo-ANSI C keywords */ #define __inline #define __signed #define __volatile /* * In non-ANSI C environments, new programs will want ANSI-only C keywords * deleted from the program and old programs will want them left alone. * When using a compiler other than gcc, programs using the ANSI C keywords * const, inline etc. as normal identifiers should define -DNO_ANSI_KEYWORDS. * When using "gcc -traditional", we assume that this is the intent; if * __GNUC__ is defined but __STDC__ is not, we leave the new keywords alone. */ #ifndef NO_ANSI_KEYWORDS #define const /* delete ANSI C keywords */ #define inline #define signed #define volatile #endif /* !NO_ANSI_KEYWORDS */ #endif /* !__CC_SUPPORTS___INLINE */ #endif /* !(__STDC__ || __cplusplus) */ /* * Compiler-dependent macros to help declare dead (non-returning) and pure (no * side effects) functions, and unused variables. These attributes are supported * by all current compilers, even pcc. */ #define __weak_symbol __attribute__((__weak__)) #define __dead2 __attribute__((__noreturn__)) #define __pure2 __attribute__((__const__)) #define __unused __attribute__((__unused__)) #define __used __attribute__((__used__)) #define __packed __attribute__((__packed__)) #define __aligned(x) __attribute__((__aligned__(x))) #define __section(x) __attribute__((__section__(x))) #define __writeonly __unused #define __alloc_size(x) __attribute__((__alloc_size__(x))) #define __alloc_size2(n, x) __attribute__((__alloc_size__(n, x))) #define __alloc_align(x) __attribute__((__alloc_align__(x))) /* * Keywords added in C11. */ #if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 201112L #if !__has_extension(c_alignas) #if (defined(__cplusplus) && __cplusplus >= 201103L) || \ __has_extension(cxx_alignas) #define _Alignas(x) alignas(x) #else /* XXX: Only emulates _Alignas(constant-expression); not _Alignas(type-name). */ #define _Alignas(x) __aligned(x) #endif #endif #if defined(__cplusplus) && __cplusplus >= 201103L #define _Alignof(x) alignof(x) #else #define _Alignof(x) __alignof(x) #endif #if defined(__cplusplus) && __cplusplus >= 201103L #define _Noreturn [[noreturn]] #else #define _Noreturn __dead2 #endif #if !__has_extension(c_static_assert) #if (defined(__cplusplus) && __cplusplus >= 201103L) || \ __has_extension(cxx_static_assert) #define _Static_assert(x, y) static_assert(x, y) #endif #endif #if !__has_extension(c_thread_local) /* * XXX: Some compilers (Clang 3.3, GCC 4.7) falsely announce C++11 mode * without actually supporting the thread_local keyword. Don't check for * the presence of C++11 when defining _Thread_local. */ #if /* (defined(__cplusplus) && __cplusplus >= 201103L) || */ \ __has_extension(cxx_thread_local) #define _Thread_local thread_local #else #define _Thread_local __thread #endif #endif #endif /* __STDC_VERSION__ || __STDC_VERSION__ < 201112L */ /* * Emulation of C11 _Generic(). Unlike the previously defined C11 * keywords, it is not possible to implement this using exactly the same * syntax. Therefore implement something similar under the name * __generic(). Unlike _Generic(), this macro can only distinguish * between a single type, so it requires nested invocations to * distinguish multiple cases. * * Note that the comma operator is used to force expr to decay in * order to match _Generic(). */ #if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) || \ __has_extension(c_generic_selections) #define __generic(expr, t, yes, no) \ _Generic(expr, t: yes, default: no) #elif !defined(__cplusplus) #define __generic(expr, t, yes, no) \ __builtin_choose_expr( \ __builtin_types_compatible_p(__typeof((0, (expr))), t), yes, no) #endif /* * C99 Static array indices in function parameter declarations. Syntax such as: * void bar(int myArray[static 10]); * is allowed in C99 but not in C++. Define __min_size appropriately so * headers using it can be compiled in either language. Use like this: * void bar(int myArray[__min_size(10)]); */ #if !defined(__cplusplus) && \ (!defined(__STDC_VERSION__) || (__STDC_VERSION__ >= 199901)) #define __min_size(x) static (x) #else #define __min_size(x) (x) #endif #define __malloc_like __attribute__((__malloc__)) #define __pure __attribute__((__pure__)) #define __always_inline __attribute__((__always_inline__)) #define __noinline __attribute__ ((__noinline__)) #define __fastcall __attribute__((__fastcall__)) #define __result_use_check __attribute__((__warn_unused_result__)) #ifdef __clang__ /* * clang and gcc have different semantics for __warn_unused_result__: the latter * does not permit the use of a void cast to suppress the warning. Use * __result_use_or_ignore_check in places where a void cast is acceptable. * This can be implemented by [[nodiscard]] from C23. */ #define __result_use_or_ignore_check __result_use_check #else #define __result_use_or_ignore_check #endif /* !__clang__ */ #define __returns_twice __attribute__((__returns_twice__)) #define __unreachable() __builtin_unreachable() #if !defined(__STRICT_ANSI__) || __STDC_VERSION__ >= 199901 #define __LONG_LONG_SUPPORTED #endif /* C++11 exposes a load of C99 stuff */ #if defined(__cplusplus) && __cplusplus >= 201103L #define __LONG_LONG_SUPPORTED #ifndef __STDC_LIMIT_MACROS #define __STDC_LIMIT_MACROS #endif #ifndef __STDC_CONSTANT_MACROS #define __STDC_CONSTANT_MACROS #endif #endif /* * noexcept keyword added in C++11. */ #if defined(__cplusplus) && __cplusplus >= 201103L #define __noexcept noexcept #define __noexcept_if(__c) noexcept(__c) #else #define __noexcept #define __noexcept_if(__c) #endif /* * We use `__restrict' as a way to define the `restrict' type qualifier * without disturbing older software that is unaware of C99 keywords. * GCC also provides `__restrict' as an extension to support C99-style * restricted pointers in other language modes. */ #if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901 #define __restrict restrict #endif #define __predict_true(exp) __builtin_expect((exp), 1) #define __predict_false(exp) __builtin_expect((exp), 0) #define __null_sentinel __attribute__((__sentinel__)) #define __exported __attribute__((__visibility__("default"))) #define __hidden __attribute__((__visibility__("hidden"))) /* * We define this here since , , and * require it. */ #define __offsetof(type, field) __builtin_offsetof(type, field) #define __rangeof(type, start, end) \ (__offsetof(type, end) - __offsetof(type, start)) /* * Given the pointer x to the member m of the struct s, return * a pointer to the containing structure. When using GCC, we first * assign pointer x to a local variable, to check that its type is * compatible with member m. */ #define __containerof(x, s, m) ({ \ const volatile __typeof(((s *)0)->m) *__x = (x); \ __DEQUALIFY(s *, (const volatile char *)__x - __offsetof(s, m));\ }) /* * Compiler-dependent macros to declare that functions take printf-like * or scanf-like arguments. They are null except for versions of gcc * that are known to support the features properly (old versions of gcc-2 * didn't permit keeping the keywords out of the application namespace). */ #define __printflike(fmtarg, firstvararg) \ __attribute__((__format__ (__printf__, fmtarg, firstvararg))) #define __scanflike(fmtarg, firstvararg) \ __attribute__((__format__ (__scanf__, fmtarg, firstvararg))) #define __format_arg(fmtarg) __attribute__((__format_arg__ (fmtarg))) #define __strfmonlike(fmtarg, firstvararg) \ __attribute__((__format__ (__strfmon__, fmtarg, firstvararg))) #define __strftimelike(fmtarg, firstvararg) \ __attribute__((__format__ (__strftime__, fmtarg, firstvararg))) #define __printf0like(fmtarg, firstvararg) \ __attribute__((__format__ (__printf0__, fmtarg, firstvararg))) #define __strong_reference(sym,aliassym) \ extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym))) #ifdef __STDC__ #define __weak_reference(sym,alias) \ __asm__(".weak " #alias); \ __asm__(".equ " #alias ", " #sym) #define __warn_references(sym,msg) \ __asm__(".section .gnu.warning." #sym); \ __asm__(".asciz \"" msg "\""); \ __asm__(".previous") +#ifdef __CC_SUPPORTS_SYMVER #define __sym_compat(sym,impl,verid) \ __asm__(".symver " #impl ", " #sym "@" #verid) #define __sym_default(sym,impl,verid) \ __asm__(".symver " #impl ", " #sym "@@@" #verid) +#endif #else #define __weak_reference(sym,alias) \ __asm__(".weak alias"); \ __asm__(".equ alias, sym") #define __warn_references(sym,msg) \ __asm__(".section .gnu.warning.sym"); \ __asm__(".asciz \"msg\""); \ __asm__(".previous") +#ifdef __CC_SUPPORTS_SYMVER #define __sym_compat(sym,impl,verid) \ __asm__(".symver impl, sym@verid") #define __sym_default(impl,sym,verid) \ __asm__(".symver impl, sym@@@verid") +#endif #endif /* __STDC__ */ #define __GLOBL(sym) __asm__(".globl " __XSTRING(sym)) #define __WEAK(sym) __asm__(".weak " __XSTRING(sym)) #define __IDSTRING(name,string) __asm__(".ident\t\"" string "\"") /* * Embed the rcs id of a source file in the resulting library. Note that in * more recent ELF binutils, we use .ident allowing the ID to be stripped. * Usage: */ #ifndef __FBSDID #if !defined(STRIP_FBSDID) #define __FBSDID(s) __IDSTRING(__CONCAT(__rcsid_,__LINE__),s) #else #define __FBSDID(s) struct __hack #endif #endif #ifndef __RCSID #ifndef NO__RCSID #define __RCSID(s) __IDSTRING(__CONCAT(__rcsid_,__LINE__),s) #else #define __RCSID(s) struct __hack #endif #endif #ifndef __RCSID_SOURCE #ifndef NO__RCSID_SOURCE #define __RCSID_SOURCE(s) __IDSTRING(__CONCAT(__rcsid_source_,__LINE__),s) #else #define __RCSID_SOURCE(s) struct __hack #endif #endif #ifndef __SCCSID #ifndef NO__SCCSID #define __SCCSID(s) __IDSTRING(__CONCAT(__sccsid_,__LINE__),s) #else #define __SCCSID(s) struct __hack #endif #endif #ifndef __COPYRIGHT #ifndef NO__COPYRIGHT #define __COPYRIGHT(s) __IDSTRING(__CONCAT(__copyright_,__LINE__),s) #else #define __COPYRIGHT(s) struct __hack #endif #endif #ifndef __DECONST #define __DECONST(type, var) ((type)(__uintptr_t)(const void *)(var)) #endif #ifndef __DEVOLATILE #define __DEVOLATILE(type, var) ((type)(__uintptr_t)(volatile void *)(var)) #endif #ifndef __DEQUALIFY #define __DEQUALIFY(type, var) ((type)(__uintptr_t)(const volatile void *)(var)) #endif #if !defined(_STANDALONE) && !defined(_KERNEL) #define __RENAME(x) __asm(__STRING(x)) #else /* _STANDALONE || _KERNEL */ #define __RENAME(x) no renaming in kernel/standalone environment #endif /*- * The following definitions are an extension of the behavior originally * implemented in , but with a different level of granularity. * POSIX.1 requires that the macros we test be defined before any standard * header file is included. * * Here's a quick run-down of the versions (and some informal names) * defined(_POSIX_SOURCE) 1003.1-1988 * encoded as 198808 below * _POSIX_C_SOURCE == 1 1003.1-1990 * encoded as 199009 below * _POSIX_C_SOURCE == 2 1003.2-1992 C Language Binding Option * encoded as 199209 below * _POSIX_C_SOURCE == 199309 1003.1b-1993 * (1003.1 Issue 4, Single Unix Spec v1, Unix 93) * _POSIX_C_SOURCE == 199506 1003.1c-1995, 1003.1i-1995, * and the omnibus ISO/IEC 9945-1: 1996 * (1003.1 Issue 5, Single Unix Spec v2, Unix 95) * _POSIX_C_SOURCE == 200112 1003.1-2001 (1003.1 Issue 6, Unix 03) * with _XOPEN_SOURCE=600 * _POSIX_C_SOURCE == 200809 1003.1-2008 (1003.1 Issue 7) * IEEE Std 1003.1-2017 (Rev of 1003.1-2008) is * 1003.1-2008 with two TCs applied and * _XOPEN_SOURCE=700 * _POSIX_C_SOURCE == 202405 1003.1-2004 (1003.1 Issue 8), IEEE Std 1003.1-2024 * with _XOPEN_SOURCE=800 * * In addition, the X/Open Portability Guide, which is now the Single UNIX * Specification, defines a feature-test macro which indicates the version of * that specification, and which subsumes _POSIX_C_SOURCE. * * Our macros begin with two underscores to avoid namespace screwage. */ /* Deal with IEEE Std. 1003.1-1990, in which _POSIX_C_SOURCE == 1. */ #if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE == 1 #undef _POSIX_C_SOURCE /* Probably illegal, but beyond caring now. */ #define _POSIX_C_SOURCE 199009 #endif /* Deal with IEEE Std. 1003.2-1992, in which _POSIX_C_SOURCE == 2. */ #if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE == 2 #undef _POSIX_C_SOURCE #define _POSIX_C_SOURCE 199209 #endif /* Deal with various X/Open Portability Guides and Single UNIX Spec. */ #ifdef _XOPEN_SOURCE #if _XOPEN_SOURCE - 0 >= 700 #define __XSI_VISIBLE 700 #undef _POSIX_C_SOURCE #define _POSIX_C_SOURCE 200809 #elif _XOPEN_SOURCE - 0 >= 600 #define __XSI_VISIBLE 600 #undef _POSIX_C_SOURCE #define _POSIX_C_SOURCE 200112 #elif _XOPEN_SOURCE - 0 >= 500 #define __XSI_VISIBLE 500 #undef _POSIX_C_SOURCE #define _POSIX_C_SOURCE 199506 #endif #endif /* * Deal with all versions of POSIX. The ordering relative to the tests above is * important. */ #if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE) #define _POSIX_C_SOURCE 198808 #endif #ifdef _POSIX_C_SOURCE #if _POSIX_C_SOURCE >= 200809 #define __POSIX_VISIBLE 200809 #define __ISO_C_VISIBLE 1999 #elif _POSIX_C_SOURCE >= 200112 #define __POSIX_VISIBLE 200112 #define __ISO_C_VISIBLE 1999 #elif _POSIX_C_SOURCE >= 199506 #define __POSIX_VISIBLE 199506 #define __ISO_C_VISIBLE 1990 #elif _POSIX_C_SOURCE >= 199309 #define __POSIX_VISIBLE 199309 #define __ISO_C_VISIBLE 1990 #elif _POSIX_C_SOURCE >= 199209 #define __POSIX_VISIBLE 199209 #define __ISO_C_VISIBLE 1990 #elif _POSIX_C_SOURCE >= 199009 #define __POSIX_VISIBLE 199009 #define __ISO_C_VISIBLE 1990 #else #define __POSIX_VISIBLE 198808 #define __ISO_C_VISIBLE 0 #endif /* _POSIX_C_SOURCE */ /* * Both glibc and OpenBSD enable c11 features when _ISOC11_SOURCE is defined, or * when compiling with -stdc=c11. A strict reading of the standard would suggest * doing it only for the former. However, a strict reading also requires C99 * mode only, so building with C11 is already undefined. Follow glibc's and * OpenBSD's lead for this non-standard configuration for maximum compatibility. */ #if _ISOC11_SOURCE || (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) #undef __ISO_C_VISIBLE #define __ISO_C_VISIBLE 2011 #endif #else /*- * Deal with _ANSI_SOURCE: * If it is defined, and no other compilation environment is explicitly * requested, then define our internal feature-test macros to zero. This * makes no difference to the preprocessor (undefined symbols in preprocessing * expressions are defined to have value zero), but makes it more convenient for * a test program to print out the values. * * If a program mistakenly defines _ANSI_SOURCE and some other macro such as * _POSIX_C_SOURCE, we will assume that it wants the broader compilation * environment (and in fact we will never get here). */ #if defined(_ANSI_SOURCE) /* Hide almost everything. */ #define __POSIX_VISIBLE 0 #define __XSI_VISIBLE 0 #define __BSD_VISIBLE 0 #define __ISO_C_VISIBLE 1990 #define __EXT1_VISIBLE 0 #elif defined(_C99_SOURCE) /* Localism to specify strict C99 env. */ #define __POSIX_VISIBLE 0 #define __XSI_VISIBLE 0 #define __BSD_VISIBLE 0 #define __ISO_C_VISIBLE 1999 #define __EXT1_VISIBLE 0 #elif defined(_C11_SOURCE) /* Localism to specify strict C11 env. */ #define __POSIX_VISIBLE 0 #define __XSI_VISIBLE 0 #define __BSD_VISIBLE 0 #define __ISO_C_VISIBLE 2011 #define __EXT1_VISIBLE 0 #else /* Default environment: show everything. */ #define __POSIX_VISIBLE 200809 #define __XSI_VISIBLE 700 #define __BSD_VISIBLE 1 #define __ISO_C_VISIBLE 2011 #define __EXT1_VISIBLE 1 #endif #endif /* User override __EXT1_VISIBLE */ #if defined(__STDC_WANT_LIB_EXT1__) #undef __EXT1_VISIBLE #if __STDC_WANT_LIB_EXT1__ #define __EXT1_VISIBLE 1 #else #define __EXT1_VISIBLE 0 #endif #endif /* __STDC_WANT_LIB_EXT1__ */ /* * Old versions of GCC use non-standard ARM arch symbols; acle-compat.h * translates them to __ARM_ARCH and the modern feature symbols defined by ARM. */ #if defined(__arm__) && !defined(__ARM_ARCH) #include #endif /* * Nullability qualifiers: currently only supported by Clang. */ #if !(defined(__clang__) && __has_feature(nullability)) #define _Nonnull #define _Nullable #define _Null_unspecified #define __NULLABILITY_PRAGMA_PUSH #define __NULLABILITY_PRAGMA_POP #else #define __NULLABILITY_PRAGMA_PUSH _Pragma("clang diagnostic push") \ _Pragma("clang diagnostic ignored \"-Wnullability-completeness\"") #define __NULLABILITY_PRAGMA_POP _Pragma("clang diagnostic pop") #endif /* * Type Safety Checking * * Clang provides additional attributes to enable checking type safety * properties that cannot be enforced by the C type system. */ #if __has_attribute(__argument_with_type_tag__) && \ __has_attribute(__type_tag_for_datatype__) #define __arg_type_tag(arg_kind, arg_idx, type_tag_idx) \ __attribute__((__argument_with_type_tag__(arg_kind, arg_idx, type_tag_idx))) #define __datatype_type_tag(kind, type) \ __attribute__((__type_tag_for_datatype__(kind, type))) #else #define __arg_type_tag(arg_kind, arg_idx, type_tag_idx) #define __datatype_type_tag(kind, type) #endif /* * Lock annotations. * * Clang provides support for doing basic thread-safety tests at * compile-time, by marking which locks will/should be held when * entering/leaving a functions. * * Furthermore, it is also possible to annotate variables and structure * members to enforce that they are only accessed when certain locks are * held. */ #if __has_extension(c_thread_safety_attributes) #define __lock_annotate(x) __attribute__((x)) #else #define __lock_annotate(x) #endif /* Structure implements a lock. */ #define __lockable __lock_annotate(lockable) /* Function acquires an exclusive or shared lock. */ #define __locks_exclusive(...) \ __lock_annotate(exclusive_lock_function(__VA_ARGS__)) #define __locks_shared(...) \ __lock_annotate(shared_lock_function(__VA_ARGS__)) /* Function attempts to acquire an exclusive or shared lock. */ #define __trylocks_exclusive(...) \ __lock_annotate(exclusive_trylock_function(__VA_ARGS__)) #define __trylocks_shared(...) \ __lock_annotate(shared_trylock_function(__VA_ARGS__)) /* Function releases a lock. */ #define __unlocks(...) __lock_annotate(unlock_function(__VA_ARGS__)) /* Function asserts that an exclusive or shared lock is held. */ #define __asserts_exclusive(...) \ __lock_annotate(assert_exclusive_lock(__VA_ARGS__)) #define __asserts_shared(...) \ __lock_annotate(assert_shared_lock(__VA_ARGS__)) /* Function requires that an exclusive or shared lock is or is not held. */ #define __requires_exclusive(...) \ __lock_annotate(exclusive_locks_required(__VA_ARGS__)) #define __requires_shared(...) \ __lock_annotate(shared_locks_required(__VA_ARGS__)) #define __requires_unlocked(...) \ __lock_annotate(locks_excluded(__VA_ARGS__)) /* Function should not be analyzed. */ #define __no_lock_analysis __lock_annotate(no_thread_safety_analysis) /* * Function or variable should not be sanitized, e.g., by AddressSanitizer. * GCC has the nosanitize attribute, but as a function attribute only, and * warns on use as a variable attribute. */ #if __has_attribute(no_sanitize) && defined(__clang__) #ifdef _KERNEL #define __nosanitizeaddress __attribute__((no_sanitize("kernel-address"))) #define __nosanitizememory __attribute__((no_sanitize("kernel-memory"))) #else #define __nosanitizeaddress __attribute__((no_sanitize("address"))) #define __nosanitizememory __attribute__((no_sanitize("memory"))) #endif #define __nosanitizethread __attribute__((no_sanitize("thread"))) #else #define __nosanitizeaddress #define __nosanitizememory #define __nosanitizethread #endif /* * Make it possible to opt out of stack smashing protection. */ #if __has_attribute(no_stack_protector) #define __nostackprotector __attribute__((no_stack_protector)) #else #define __nostackprotector \ __attribute__((__optimize__("-fno-stack-protector"))) #endif /* Guard variables and structure members by lock. */ #define __guarded_by(x) __lock_annotate(guarded_by(x)) #define __pt_guarded_by(x) __lock_annotate(pt_guarded_by(x)) /* Alignment builtins for better type checking and improved code generation. */ /* Provide fallback versions for other compilers (GCC/Clang < 10): */ #if !__has_builtin(__builtin_is_aligned) #define __builtin_is_aligned(x, align) \ (((__uintptr_t)(x) & ((align) - 1)) == 0) #endif #if !__has_builtin(__builtin_align_up) #define __builtin_align_up(x, align) \ ((__typeof__(x))(((__uintptr_t)(x)+((align)-1))&(~((align)-1)))) #endif #if !__has_builtin(__builtin_align_down) #define __builtin_align_down(x, align) \ ((__typeof__(x))((x)&(~((align)-1)))) #endif #define __align_up(x, y) __builtin_align_up(x, y) #define __align_down(x, y) __builtin_align_down(x, y) #define __is_aligned(x, y) __builtin_is_aligned(x, y) #endif /* !_SYS_CDEFS_H_ */