/* vi: set sw=4 ts=4: */
/*
- Copyright 2006, Bernhard Reutner-Fischer
-
- Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
-*/
-#ifndef BB_PLATFORM_H
+ * Copyright 2006, Bernhard Reutner-Fischer
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
+#ifndef BB_PLATFORM_H
#define BB_PLATFORM_H 1
/* Assume all these functions exist by default. Platforms where it is not
* true will #undef them below.
*/
-#define HAVE_FDPRINTF 1
+#define HAVE_CLEARENV 1
+#define HAVE_FDATASYNC 1
+#define HAVE_DPRINTF 1
+#define HAVE_MEMRCHR 1
+#define HAVE_MKDTEMP 1
+#define HAVE_PTSNAME_R 1
+#define HAVE_SETBIT 1
+#define HAVE_SIGHANDLER_T 1
+#define HAVE_STPCPY 1
+#define HAVE_STRCASESTR 1
#define HAVE_STRCHRNUL 1
+#define HAVE_STRSEP 1
+#define HAVE_STRSIGNAL 1
#define HAVE_VASPRINTF 1
/* Convenience macros to test the version of gcc. */
#define UNUSED_PARAM __attribute__ ((__unused__))
#define NORETURN __attribute__ ((__noreturn__))
+/* "The malloc attribute is used to tell the compiler that a function
+ * may be treated as if any non-NULL pointer it returns cannot alias
+ * any other pointer valid when the function returns. This will often
+ * improve optimization. Standard functions with this property include
+ * malloc and calloc. realloc-like functions have this property as long
+ * as the old pointer is never referred to (including comparing it
+ * to the new pointer) after the function returns a non-NULL value."
+ */
+#define RETURNS_MALLOC __attribute__ ((malloc))
#define PACKED __attribute__ ((__packed__))
#define ALIGNED(m) __attribute__ ((__aligned__(m)))
# define EXTERNALLY_VISIBLE
#endif
+/* At 4.4 gcc become much more anal about this, need to use "aliased" types */
+#if __GNUC_PREREQ(4,4)
+# define FIX_ALIASING __attribute__((__may_alias__))
+#else
+# define FIX_ALIASING
+#endif
+
/* We use __extension__ in some places to suppress -pedantic warnings
about GCC extensions. This feature didn't work properly before
gcc 2.8. */
/* ---- Endian Detection ------------------------------------ */
+#include <limits.h>
#if defined(__digital__) && defined(__unix__)
# include <sex.h>
-# define __BIG_ENDIAN__ (BYTE_ORDER == BIG_ENDIAN)
-# define __BYTE_ORDER BYTE_ORDER
-#elif defined __FreeBSD__
-# include <sys/resource.h> /* rlimit */
+#elif defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) \
+ || defined(__APPLE__)
+# include <sys/resource.h> /* rlimit */
# include <machine/endian.h>
# define bswap_64 __bswap64
# define bswap_32 __bswap32
# define bswap_16 __bswap16
-# define __BIG_ENDIAN__ (_BYTE_ORDER == _BIG_ENDIAN)
-#elif !defined __APPLE__
+#else
# include <byteswap.h>
# include <endian.h>
#endif
-#if defined(__BIG_ENDIAN__) && __BIG_ENDIAN__
+#if defined(__BYTE_ORDER) && __BYTE_ORDER == __BIG_ENDIAN
# define BB_BIG_ENDIAN 1
# define BB_LITTLE_ENDIAN 0
-#elif __BYTE_ORDER == __BIG_ENDIAN
+#elif defined(__BYTE_ORDER) && __BYTE_ORDER == __LITTLE_ENDIAN
+# define BB_BIG_ENDIAN 0
+# define BB_LITTLE_ENDIAN 1
+#elif defined(_BYTE_ORDER) && _BYTE_ORDER == _BIG_ENDIAN
# define BB_BIG_ENDIAN 1
# define BB_LITTLE_ENDIAN 0
-#elif __BYTE_ORDER == __LITTLE_ENDIAN
+#elif defined(_BYTE_ORDER) && _BYTE_ORDER == _LITTLE_ENDIAN
+# define BB_BIG_ENDIAN 0
+# define BB_LITTLE_ENDIAN 1
+#elif defined(BYTE_ORDER) && BYTE_ORDER == BIG_ENDIAN
+# define BB_BIG_ENDIAN 1
+# define BB_LITTLE_ENDIAN 0
+#elif defined(BYTE_ORDER) && BYTE_ORDER == LITTLE_ENDIAN
+# define BB_BIG_ENDIAN 0
+# define BB_LITTLE_ENDIAN 1
+#elif defined(__386__)
# define BB_BIG_ENDIAN 0
# define BB_LITTLE_ENDIAN 1
#else
# error "Can't determine endianness"
#endif
+#if ULONG_MAX > 0xffffffff
+# define bb_bswap_64(x) bswap_64(x)
+#endif
+
/* SWAP_LEnn means "convert CPU<->little_endian by swapping bytes" */
#if BB_BIG_ENDIAN
# define SWAP_BE16(x) (x)
# define SWAP_BE64(x) (x)
# define SWAP_LE16(x) bswap_16(x)
# define SWAP_LE32(x) bswap_32(x)
-# define SWAP_LE64(x) bswap_64(x)
+# define SWAP_LE64(x) bb_bswap_64(x)
+# define IF_BIG_ENDIAN(...) __VA_ARGS__
+# define IF_LITTLE_ENDIAN(...)
#else
# define SWAP_BE16(x) bswap_16(x)
# define SWAP_BE32(x) bswap_32(x)
-# define SWAP_BE64(x) bswap_64(x)
+# define SWAP_BE64(x) bb_bswap_64(x)
# define SWAP_LE16(x) (x)
# define SWAP_LE32(x) (x)
# define SWAP_LE64(x) (x)
+# define IF_BIG_ENDIAN(...)
+# define IF_LITTLE_ENDIAN(...) __VA_ARGS__
#endif
/* ---- Unaligned access ------------------------------------ */
+#include <stdint.h>
+typedef int bb__aliased_int FIX_ALIASING;
+typedef uint16_t bb__aliased_uint16_t FIX_ALIASING;
+typedef uint32_t bb__aliased_uint32_t FIX_ALIASING;
+
/* NB: unaligned parameter should be a pointer, aligned one -
* a lvalue. This makes it more likely to not swap them by mistake
*/
-#if defined(i386) || defined(__x86_64__)
-# define move_from_unaligned16(v, u16p) ((v) = *(uint16_t*)(u16p))
-# define move_from_unaligned32(v, u32p) ((v) = *(uint32_t*)(u32p))
-# define move_to_unaligned32(u32p, v) (*(uint32_t*)(u32p) = (v))
+#if defined(i386) || defined(__x86_64__) || defined(__powerpc__)
+# define move_from_unaligned_int(v, intp) ((v) = *(bb__aliased_int*)(intp))
+# define move_from_unaligned16(v, u16p) ((v) = *(bb__aliased_uint16_t*)(u16p))
+# define move_from_unaligned32(v, u32p) ((v) = *(bb__aliased_uint32_t*)(u32p))
+# define move_to_unaligned16(u16p, v) (*(bb__aliased_uint16_t*)(u16p) = (v))
+# define move_to_unaligned32(u32p, v) (*(bb__aliased_uint32_t*)(u32p) = (v))
/* #elif ... - add your favorite arch today! */
#else
/* performs reasonably well (gcc usually inlines memcpy here) */
+# define move_from_unaligned_int(v, intp) (memcpy(&(v), (intp), sizeof(int)))
# define move_from_unaligned16(v, u16p) (memcpy(&(v), (u16p), 2))
# define move_from_unaligned32(v, u32p) (memcpy(&(v), (u32p), 4))
+# define move_to_unaligned16(u16p, v) do { \
+ uint16_t __t = (v); \
+ memcpy((u16p), &__t, 4); \
+} while (0)
# define move_to_unaligned32(u32p, v) do { \
uint32_t __t = (v); \
memcpy((u32p), &__t, 4); \
} while (0)
#endif
-/* ---- Networking ------------------------------------------ */
-
-#ifndef __APPLE__
-# include <arpa/inet.h>
-# if !defined(__socklen_t_defined) && !defined(_SOCKLEN_T_DECLARED)
-typedef int socklen_t;
-# endif
-#else
-# include <netinet/in.h>
-#endif
-
/* ---- Compiler dependent settings ------------------------- */
#if (defined __digital__ && defined __unix__) \
- || defined __APPLE__ || defined __FreeBSD__
+ || defined __APPLE__ \
+ || defined __FreeBSD__ || defined __OpenBSD__ || defined __NetBSD__
+# undef HAVE_CLEARENV
+# undef HAVE_FDATASYNC
# undef HAVE_MNTENT_H
+# undef HAVE_PTSNAME_R
# undef HAVE_SYS_STATFS_H
+# undef HAVE_SIGHANDLER_T
+# undef HAVE_XTABS
+# undef HAVE_DPRINTF
#else
# define HAVE_MNTENT_H 1
# define HAVE_SYS_STATFS_H 1
+# define HAVE_XTABS 1
#endif
/*----- Kernel versioning ------------------------------------*/
/* ---- Miscellaneous --------------------------------------- */
-#if defined(__GNU_LIBRARY__) && __GNU_LIBRARY__ < 5 && \
- !defined(__dietlibc__) && \
- !defined(_NEWLIB_VERSION) && \
- !(defined __digital__ && defined __unix__)
-# error "Sorry, this libc version is not supported :("
-#endif
-
-/* Don't perpetuate e2fsck crap into the headers. Clean up e2fsck instead. */
-
#if defined __GLIBC__ || defined __UCLIBC__ \
|| defined __dietlibc__ || defined _NEWLIB_VERSION
# include <features.h>
-# define HAVE_FEATURES_H
-# include <stdint.h>
-# define HAVE_STDINT_H
-#elif !defined __APPLE__
-/* Largest integral types. */
-# if BB_BIG_ENDIAN
-/* Looks BROKEN! */
-typedef long intmax_t;
-typedef unsigned long uintmax_t;
-# else
-__extension__
-typedef long long intmax_t;
-__extension__
-typedef unsigned long long uintmax_t;
-# endif
#endif
/* Size-saving "small" ints (arch-dependent) */
#if 1 /* if needed: !defined(arch1) && !defined(arch2) */
# define ALIGN1 __attribute__((aligned(1)))
# define ALIGN2 __attribute__((aligned(2)))
+# define ALIGN4 __attribute__((aligned(4)))
#else
/* Arches which MUST have 2 or 4 byte alignment for everything are here */
# define ALIGN1
# define ALIGN2
+# define ALIGN4
#endif
# define USE_FOR_MMU(...) __VA_ARGS__
#endif
-/* Don't use lchown with glibc older than 2.1.x */
-#if defined(__GLIBC__) && __GLIBC__ <= 2 && __GLIBC_MINOR__ < 1
-# define lchown chown
-#endif
-
#if defined(__digital__) && defined(__unix__)
# include <standards.h>
# include <inttypes.h>
# define PRIu32 "u"
/* use legacy setpgrp(pid_t,pid_t) for now. move to platform.c */
-# define bb_setpgrp() do { pid_t __me = getpid(); setpgrp(__me,__me); } while (0)
+# define bb_setpgrp() do { pid_t __me = getpid(); setpgrp(__me, __me); } while (0)
# if !defined ADJ_OFFSET_SINGLESHOT && defined MOD_CLKA && defined MOD_OFFSET
# define ADJ_OFFSET_SINGLESHOT (MOD_CLKA | MOD_OFFSET)
# endif
# define ADJ_TICK MOD_CLKB
# endif
+# undef HAVE_STPCPY
+
#else
# define bb_setpgrp() setpgrp()
#endif
-#if defined(__GLIBC__)
-# define fdprintf dprintf
-#endif
+#include <unistd.h>
+#define fdprintf dprintf
#if defined(__dietlibc__)
-#undef HAVE_STRCHRNUL
+# undef HAVE_STRCHRNUL
#endif
#if defined(__WATCOMC__)
-#undef HAVE_FDPRINTF
-#undef HAVE_STRCHRNUL
-#undef HAVE_VASPRINTF
+# undef HAVE_DPRINTF
+# undef HAVE_MEMRCHR
+# undef HAVE_MKDTEMP
+# undef HAVE_SETBIT
+# undef HAVE_STPCPY
+# undef HAVE_STRCASESTR
+# undef HAVE_STRCHRNUL
+# undef HAVE_STRSEP
+# undef HAVE_STRSIGNAL
+# undef HAVE_VASPRINTF
#endif
#if defined(__FreeBSD__)
-#undef HAVE_STRCHRNUL
+# undef HAVE_STRCHRNUL
#endif
/*
* These must come after all the HAVE_* macros are defined (or not)
*/
+#ifndef HAVE_DPRINTF
+extern int dprintf(int fd, const char *format, ...);
+#endif
+
+#ifndef HAVE_MEMRCHR
+extern void *memrchr(const void *s, int c, size_t n) FAST_FUNC;
+#endif
+
+#ifndef HAVE_MKDTEMP
+extern char *mkdtemp(char *template) FAST_FUNC;
+#endif
+
+#ifndef HAVE_SETBIT
+# define setbit(a, b) ((a)[(b) >> 3] |= 1 << ((b) & 7))
+# define clrbit(a, b) ((a)[(b) >> 3] &= ~(1 << ((b) & 7)))
+#endif
+
+#ifndef HAVE_SIGHANDLER_T
+typedef void (*sighandler_t)(int);
+#endif
+
+#ifndef HAVE_STPCPY
+extern char *stpcpy(char *p, const char *to_add) FAST_FUNC;
+#endif
+
+#ifndef HAVE_STRCASESTR
+extern char *strcasestr(const char *s, const char *pattern) FAST_FUNC;
+#endif
+
#ifndef HAVE_STRCHRNUL
extern char *strchrnul(const char *s, int c) FAST_FUNC;
#endif
-#ifndef HAVE_VASPRINTF
-extern int vasprintf(char **string_ptr, const char *format, va_list p) FAST_FUNC;
+#ifndef HAVE_STRSEP
+extern char *strsep(char **stringp, const char *delim) FAST_FUNC;
+#endif
+
+#ifndef HAVE_STRSIGNAL
+/* Not exactly the same: instead of "Stopped" it shows "STOP" etc */
+# define strsignal(sig) get_signame(sig)
#endif
-#ifndef HAVE_FDPRINTF
-extern int fdprintf(int fd, const char *format, ...);
+#ifndef HAVE_VASPRINTF
+extern int vasprintf(char **string_ptr, const char *format, va_list p) FAST_FUNC;
#endif
#endif
projects / oweals / busybox.git / blobdiff