/* vi: set sw=4 ts=4: */
/*
- Copyright 2006, Bernhard Fischer
+ Copyright 2006, Bernhard Reutner-Fischer
Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
*/
-#ifndef __PLATFORM_H
-#define __PLATFORM_H 1
+#ifndef BB_PLATFORM_H
+#define BB_PLATFORM_H 1
/* Convenience macros to test the version of gcc. */
#undef __GNUC_PREREQ
#if defined __GNUC__ && defined __GNUC_MINOR__
# define __GNUC_PREREQ(maj, min) \
- ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
+ ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
#else
# define __GNUC_PREREQ(maj, min) 0
#endif
/* __restrict is known in EGCS 1.2 and above. */
-#if !__GNUC_PREREQ (2,92)
+#if !__GNUC_PREREQ(2,92)
# ifndef __restrict
-# define __restrict /* Ignore */
+# define __restrict
# endif
#endif
macros freely, and know that they will come into play for the
version of gcc in which they are supported. */
-#if !__GNUC_PREREQ (2,7)
+#if !__GNUC_PREREQ(2,7)
# ifndef __attribute__
# define __attribute__(x)
# endif
#endif
#undef inline
-#if __STDC_VERSION__ > 199901L
+#if defined(__STDC_VERSION__) && __STDC_VERSION__ > 199901L
/* it's a keyword */
+#elif __GNUC_PREREQ(2,7)
+# define inline __inline__
#else
-# if __GNUC_PREREQ (2,7)
-# define inline __inline__
-# else
-# define inline
-# endif
+# define inline
#endif
#ifndef __const
# define __const const
#endif
-# define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
-# define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__))
-# define ATTRIBUTE_PACKED __attribute__ ((__packed__))
-# define ATTRIBUTE_ALIGNED(m) __attribute__ ((__aligned__(m)))
-# if __GNUC_PREREQ (3,0)
-# define ATTRIBUTE_ALWAYS_INLINE __attribute__ ((always_inline)) inline
+#define UNUSED_PARAM __attribute__ ((__unused__))
+#define NORETURN __attribute__ ((__noreturn__))
+#define PACKED __attribute__ ((__packed__))
+#define ALIGNED(m) __attribute__ ((__aligned__(m)))
+
+/* __NO_INLINE__: some gcc's do not honor inlining! :( */
+#if __GNUC_PREREQ(3,0) && !defined(__NO_INLINE__)
+# define ALWAYS_INLINE __attribute__ ((always_inline)) inline
+/* I've seen a toolchain where I needed __noinline__ instead of noinline */
+# define NOINLINE __attribute__((__noinline__))
+# if !ENABLE_WERROR
+# define DEPRECATED __attribute__ ((__deprecated__))
+# define UNUSED_PARAM_RESULT __attribute__ ((warn_unused_result))
# else
-# define ATTRIBUTE_ALWAYS_INLINE inline
+# define DEPRECATED
+# define UNUSED_PARAM_RESULT
# endif
+#else
+# define ALWAYS_INLINE inline
+# define NOINLINE
+# define DEPRECATED
+# define UNUSED_PARAM_RESULT
+#endif
/* -fwhole-program makes all symbols local. The attribute externally_visible
forces a symbol global. */
-# if __GNUC_PREREQ (4,1)
-# define ATTRIBUTE_EXTERNALLY_VISIBLE __attribute__ ((__externally_visible__))
-# else
-# define ATTRIBUTE_EXTERNALLY_VISIBLE
-# endif /* GNUC >= 4.1 */
+#if __GNUC_PREREQ(4,1)
+# define EXTERNALLY_VISIBLE __attribute__(( visibility("default") ))
+//__attribute__ ((__externally_visible__))
+#else
+# define EXTERNALLY_VISIBLE
+#endif
/* We use __extension__ in some places to suppress -pedantic warnings
about GCC extensions. This feature didn't work properly before
gcc 2.8. */
-#if !__GNUC_PREREQ (2,8)
+#if !__GNUC_PREREQ(2,8)
# ifndef __extension__
# define __extension__
# endif
#endif
+/* gcc-2.95 had no va_copy but only __va_copy. */
+#if !__GNUC_PREREQ(3,0)
+# include <stdarg.h>
+# if !defined va_copy && defined __va_copy
+# define va_copy(d,s) __va_copy((d),(s))
+# endif
+#endif
+
+/* FAST_FUNC is a qualifier which (possibly) makes function call faster
+ * and/or smaller by using modified ABI. It is usually only needed
+ * on non-static, busybox internal functions. Recent versions of gcc
+ * optimize statics automatically. FAST_FUNC on static is required
+ * only if you need to match a function pointer's type */
+#if __GNUC_PREREQ(3,0) && defined(i386) /* || defined(__x86_64__)? */
+/* stdcall makes callee to pop arguments from stack, not caller */
+# define FAST_FUNC __attribute__((regparm(3),stdcall))
+/* #elif ... - add your favorite arch today! */
+#else
+# define FAST_FUNC
+#endif
+
+/* Make all declarations hidden (-fvisibility flag only affects definitions) */
+/* (don't include system headers after this until corresponding pop!) */
+#if __GNUC_PREREQ(4,1)
+# define PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN _Pragma("GCC visibility push(hidden)")
+# define POP_SAVED_FUNCTION_VISIBILITY _Pragma("GCC visibility pop")
+#else
+# define PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
+# define POP_SAVED_FUNCTION_VISIBILITY
+#endif
+
/* ---- Endian Detection ------------------------------------ */
-#if (defined __digital__ && defined __unix__)
+#if defined(__digital__) && defined(__unix__)
# include <sex.h>
# define __BIG_ENDIAN__ (BYTE_ORDER == BIG_ENDIAN)
# define __BYTE_ORDER BYTE_ORDER
+#elif defined __FreeBSD__
+char *strchrnul(const char *s, int c);
+# 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__
# include <byteswap.h>
# include <endian.h>
#endif
-#ifdef __BIG_ENDIAN__
+#if defined(__BIG_ENDIAN__) && __BIG_ENDIAN__
# define BB_BIG_ENDIAN 1
# define BB_LITTLE_ENDIAN 0
#elif __BYTE_ORDER == __BIG_ENDIAN
# define BB_BIG_ENDIAN 1
# define BB_LITTLE_ENDIAN 0
-#else
+#elif __BYTE_ORDER == __LITTLE_ENDIAN
# define BB_BIG_ENDIAN 0
# define BB_LITTLE_ENDIAN 1
+#else
+# error "Can't determine endiannes"
#endif
+/* SWAP_LEnn means "convert CPU<->little_endian by swapping bytes" */
#if BB_BIG_ENDIAN
-#define SWAP_BE16(x) (x)
-#define SWAP_BE32(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_BE16(x) (x)
+# define SWAP_BE32(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)
+#else
+# define SWAP_BE16(x) bswap_16(x)
+# define SWAP_BE32(x) bswap_32(x)
+# define SWAP_BE64(x) bswap_64(x)
+# define SWAP_LE16(x) (x)
+# define SWAP_LE32(x) (x)
+# define SWAP_LE64(x) (x)
+#endif
+
+/* ---- Unaligned access ------------------------------------ */
+
+/* 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))
+/* #elif ... - add your favorite arch today! */
#else
-#define SWAP_BE16(x) bswap_16(x)
-#define SWAP_BE32(x) bswap_32(x)
-#define SWAP_BE64(x) bswap_64(x)
-#define SWAP_LE16(x) (x)
-#define SWAP_LE32(x) (x)
-#define SWAP_LE64(x) (x)
+/* performs reasonably well (gcc usually inlines memcpy here) */
+# define move_from_unaligned16(v, u16p) (memcpy(&(v), (u16p), 2))
+# define move_from_unaligned32(v, u32p) (memcpy(&(v), (u32p), 4))
+# 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
-#ifndef __socklen_t_defined
-typedef int socklen_t;
-#endif
-
/* ---- Compiler dependent settings ------------------------- */
-#ifndef __GNUC__
-#if defined __INTEL_COMPILER
-__extension__ typedef __signed__ long long __s64;
-__extension__ typedef unsigned long long __u64;
-#endif /* __INTEL_COMPILER */
-#endif /* ifndef __GNUC__ */
-#if (defined __digital__ && defined __unix__)
+#if (defined __digital__ && defined __unix__) \
+ || defined __APPLE__ || defined __FreeBSD__
# undef HAVE_MNTENT_H
+# undef HAVE_SYS_STATFS_H
#else
# define HAVE_MNTENT_H 1
-#endif /* ___digital__ && __unix__ */
+# define HAVE_SYS_STATFS_H 1
+#endif
/*----- Kernel versioning ------------------------------------*/
+
#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
-/* ---- miscellaneous --------------------------------------- */
+/* ---- Miscellaneous --------------------------------------- */
#if defined(__GNU_LIBRARY__) && __GNU_LIBRARY__ < 5 && \
!defined(__dietlibc__) && \
# error "Sorry, this libc version is not supported :("
#endif
-// Don't perpetuate e2fsck crap into the headers. Clean up e2fsck instead.
+/* Don't perpetuate e2fsck crap into the headers. Clean up e2fsck instead. */
#if defined __GLIBC__ || defined __UCLIBC__ \
- || defined __dietlibc__ || defined _NEWLIB_VERSION
-#define _XOPEN_SOURCE
-#include <features.h>
-#define HAVE_FEATURES_H
-#include <stdint.h>
-#define HAVE_STDINT_H
-#else
-/* Largest integral types. */
-#if __BIG_ENDIAN__
-typedef long int intmax_t;
-typedef unsigned long int uintmax_t;
-#else
+ || 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 int intmax_t;
+typedef long long intmax_t;
__extension__
-typedef unsigned long long int uintmax_t;
+typedef unsigned long long uintmax_t;
+# endif
+#endif
+
+/* Size-saving "small" ints (arch-dependent) */
+#if defined(i386) || defined(__x86_64__) || defined(__mips__) || defined(__cris__)
+/* add other arches which benefit from this... */
+typedef signed char smallint;
+typedef unsigned char smalluint;
+#else
+/* for arches where byte accesses generate larger code: */
+typedef int smallint;
+typedef unsigned smalluint;
+#endif
+
+/* ISO C Standard: 7.16 Boolean type and values <stdbool.h> */
+#if (defined __digital__ && defined __unix__)
+/* old system without (proper) C99 support */
+# define bool smalluint
+#else
+/* modern system, so use it */
+# include <stdbool.h>
#endif
+
+/* Try to defeat gcc's alignment of "char message[]"-like data */
+#if 1 /* if needed: !defined(arch1) && !defined(arch2) */
+# define ALIGN1 __attribute__((aligned(1)))
+# define ALIGN2 __attribute__((aligned(2)))
+#else
+/* Arches which MUST have 2 or 4 byte alignment for everything are here */
+# define ALIGN1
+# define ALIGN2
#endif
+
/* uclibc does not implement daemon() for no-mmu systems.
* For 0.9.29 and svn, __ARCH_USE_MMU__ indicates no-mmu reliably.
* For earlier versions there is no reliable way to check if we are building
- * for a mmu-less system; the user should pass EXTRA_CFLAGS="-DBB_NOMMU"
- * on his own.
+ * for a mmu-less system.
*/
-#if defined __UCLIBC__ && __UCLIBC_MAJOR__ >= 0 && __UCLIBC_MINOR__ >= 9 && \
- __UCLIBC_SUBLEVEL__ > 28 && !defined __ARCH_USE_MMU__
-#define BB_NOMMU
+#if ENABLE_NOMMU || \
+ (defined __UCLIBC__ && __UCLIBC_MAJOR__ >= 0 && __UCLIBC_MINOR__ >= 9 && \
+ __UCLIBC_SUBLEVEL__ > 28 && !defined __ARCH_USE_MMU__)
+# define BB_MMU 0
+# define USE_FOR_NOMMU(...) __VA_ARGS__
+# define USE_FOR_MMU(...)
+#else
+# define BB_MMU 1
+# define USE_FOR_NOMMU(...)
+# define USE_FOR_MMU(...) __VA_ARGS__
#endif
/* Platforms that haven't got dprintf need to implement fdprintf() in
* libbb. This would require a platform.c. It's not going to be cleaned
* out of the tree, so stop saying it should be. */
-#define fdprintf dprintf
-
-/* Don't use lchown with glibc older then 2.1.x ... uC-libc lacks it */
-#if (defined __GLIBC__ && __GLIBC__ <= 2 && __GLIBC_MINOR__ < 1) || \
- defined __UC_LIBC__
-# define lchown chown
+#if !defined(__dietlibc__)
+/* Needed for: glibc */
+/* Not needed for: dietlibc */
+/* Others: ?? (add as needed) */
+# define fdprintf dprintf
#endif
-/* THIS SHOULD BE CLEANED OUT OF THE TREE ENTIRELY */
-/* FIXME: fix tar.c! */
-#ifndef FNM_LEADING_DIR
-#define FNM_LEADING_DIR 0
+#if defined(__dietlibc__)
+static ALWAYS_INLINE char* strchrnul(const char *s, char c)
+{
+ while (*s && *s != c) ++s;
+ return (char*)s;
+}
#endif
-#if (defined __digital__ && defined __unix__)
-#include <standards.h>
-#define HAVE_STANDARDS_H
-#include <inttypes.h>
-#define HAVE_INTTYPES_H
-#define PRIu32 "u"
+/* Don't use lchown with glibc older than 2.1.x */
+#if defined(__GLIBC__) && __GLIBC__ <= 2 && __GLIBC_MINOR__ < 1
+# define lchown chown
+#endif
-/* use legacy setpgrp(pidt_,pid_t) for now. move to platform.c */
-#define bb_setpgrp do{pid_t __me = getpid();setpgrp(__me,__me);}while(0)
+#if defined(__digital__) && defined(__unix__)
-#if !defined ADJ_OFFSET_SINGLESHOT && defined MOD_CLKA && defined MOD_OFFSET
-#define ADJ_OFFSET_SINGLESHOT (MOD_CLKA | MOD_OFFSET)
-#endif
-#if !defined ADJ_FREQUENCY && defined MOD_FREQUENCY
-#define ADJ_FREQUENCY MOD_FREQUENCY
-#endif
-#if !defined ADJ_TIMECONST && defined MOD_TIMECONST
-#define ADJ_TIMECONST MOD_TIMECONST
-#endif
-#if !defined ADJ_TICK && defined MOD_CLKB
-#define ADJ_TICK MOD_CLKB
-#endif
+# 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)
+# if !defined ADJ_OFFSET_SINGLESHOT && defined MOD_CLKA && defined MOD_OFFSET
+# define ADJ_OFFSET_SINGLESHOT (MOD_CLKA | MOD_OFFSET)
+# endif
+# if !defined ADJ_FREQUENCY && defined MOD_FREQUENCY
+# define ADJ_FREQUENCY MOD_FREQUENCY
+# endif
+# if !defined ADJ_TIMECONST && defined MOD_TIMECONST
+# define ADJ_TIMECONST MOD_TIMECONST
+# endif
+# if !defined ADJ_TICK && defined MOD_CLKB
+# define ADJ_TICK MOD_CLKB
+# endif
#else
-#define bb_setpgrp setpgrp()
-#endif
-#if defined(__linux__)
-#include <sys/mount.h>
-// Make sure we have all the new mount flags we actually try to use.
-#ifndef MS_BIND
-#define MS_BIND (1<<12)
-#endif
-#ifndef MS_MOVE
-#define MS_MOVE (1<<13)
-#endif
-#ifndef MS_RECURSIVE
-#define MS_RECURSIVE (1<<14)
-#endif
-#ifndef MS_SILENT
-#define MS_SILENT (1<<15)
-#endif
+# define bb_setpgrp() setpgrp()
-// The shared subtree stuff, which went in around 2.6.15
-#ifndef MS_UNBINDABLE
-#define MS_UNBINDABLE (1<<17)
-#endif
-#ifndef MS_PRIVATE
-#define MS_PRIVATE (1<<18)
-#endif
-#ifndef MS_SLAVE
-#define MS_SLAVE (1<<19)
-#endif
-#ifndef MS_SHARED
-#define MS_SHARED (1<<20)
#endif
-
-#if !defined(BLKSSZGET)
-#define BLKSSZGET _IO(0x12, 104)
-#endif
-#if !defined(BLKGETSIZE64)
-#define BLKGETSIZE64 _IOR(0x12,114,size_t)
-#endif
-#endif
-#endif /* platform.h */
+#endif
projects / oweals / busybox.git / blobdiff