339 lines
9.1 KiB
C
339 lines
9.1 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
Copyright 2006, Bernhard Fischer
|
|
|
|
Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
|
|
*/
|
|
#ifndef __PLATFORM_H
|
|
#define __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))
|
|
#else
|
|
# define __GNUC_PREREQ(maj, min) 0
|
|
#endif
|
|
|
|
/* __restrict is known in EGCS 1.2 and above. */
|
|
#if !__GNUC_PREREQ (2,92)
|
|
# ifndef __restrict
|
|
# define __restrict /* Ignore */
|
|
# endif
|
|
#endif
|
|
|
|
/* Define macros for some gcc attributes. This permits us to use the
|
|
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)
|
|
# ifndef __attribute__
|
|
# define __attribute__(x)
|
|
# endif
|
|
#endif
|
|
|
|
#undef inline
|
|
#if defined(__STDC_VERSION__) && __STDC_VERSION__ > 199901L
|
|
/* it's a keyword */
|
|
#else
|
|
# if __GNUC_PREREQ (2,7)
|
|
# define inline __inline__
|
|
# else
|
|
# define inline
|
|
# endif
|
|
#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)))
|
|
/* __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 ATTRIBUTE_DEPRECATED __attribute__ ((__deprecated__))
|
|
# define ATTRIBUTE_UNUSED_RESULT __attribute__ ((warn_unused_result))
|
|
# else
|
|
# define ATTRIBUTE_DEPRECATED /* n/a */
|
|
# define ATTRIBUTE_UNUSED_RESULT /* n/a */
|
|
# endif
|
|
# else
|
|
# define ALWAYS_INLINE inline /* n/a */
|
|
# define NOINLINE /* n/a */
|
|
# define ATTRIBUTE_DEPRECATED /* n/a */
|
|
# define ATTRIBUTE_UNUSED_RESULT /* n/a */
|
|
# endif
|
|
|
|
/* -fwhole-program makes all symbols local. The attribute externally_visible
|
|
forces a symbol global. */
|
|
# if __GNUC_PREREQ (4,1)
|
|
# define EXTERNALLY_VISIBLE __attribute__(( visibility("default") ))
|
|
//__attribute__ ((__externally_visible__))
|
|
# else
|
|
# define EXTERNALLY_VISIBLE
|
|
# endif /* GNUC >= 4.1 */
|
|
|
|
/* 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)
|
|
# 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
|
|
|
|
/* ---- Endian Detection ------------------------------------ */
|
|
|
|
#if (defined __digital__ && defined __unix__)
|
|
# include <sex.h>
|
|
# define __BIG_ENDIAN__ (BYTE_ORDER == BIG_ENDIAN)
|
|
# define __BYTE_ORDER BYTE_ORDER
|
|
#elif !defined __APPLE__
|
|
# include <byteswap.h>
|
|
# include <endian.h>
|
|
#endif
|
|
|
|
#ifdef __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
|
|
# define BB_BIG_ENDIAN 0
|
|
# define BB_LITTLE_ENDIAN 1
|
|
#endif
|
|
|
|
#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)
|
|
#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
|
|
|
|
/* ---- Networking ------------------------------------------ */
|
|
#ifndef __APPLE__
|
|
# include <arpa/inet.h>
|
|
# ifndef __socklen_t_defined
|
|
typedef int socklen_t;
|
|
# endif
|
|
#else
|
|
# include <netinet/in.h>
|
|
#endif
|
|
|
|
/* ---- Compiler dependent settings ------------------------- */
|
|
#if (defined __digital__ && defined __unix__) || defined __APPLE__
|
|
# undef HAVE_MNTENT_H
|
|
# undef HAVE_SYS_STATFS_H
|
|
#else
|
|
# define HAVE_MNTENT_H 1
|
|
# define HAVE_SYS_STATFS_H 1
|
|
#endif /* ___digital__ && __unix__ */
|
|
|
|
/* linux/loop.h relies on __u64. Make sure we have that as a proper type
|
|
* until userspace is widely fixed. */
|
|
#if (defined __INTEL_COMPILER && !defined __GNUC__) || \
|
|
(defined __GNUC__ && defined __STRICT_ANSI__)
|
|
__extension__ typedef __signed__ long long __s64;
|
|
__extension__ typedef unsigned long long __u64;
|
|
#endif
|
|
|
|
/*----- Kernel versioning ------------------------------------*/
|
|
#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
|
|
|
|
/* ---- 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 __BIG_ENDIAN__
|
|
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 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.
|
|
*/
|
|
#if ENABLE_NOMMU || \
|
|
(defined __UCLIBC__ && __UCLIBC_MAJOR__ >= 0 && __UCLIBC_MINOR__ >= 9 && \
|
|
__UCLIBC_SUBLEVEL__ > 28 && !defined __ARCH_USE_MMU__)
|
|
#define BB_MMU 0
|
|
#define BB_NOMMU 1
|
|
#define USE_FOR_NOMMU(...) __VA_ARGS__
|
|
#define USE_FOR_MMU(...)
|
|
#else
|
|
#define BB_MMU 1
|
|
/* BB_NOMMU is not defined in this case! */
|
|
#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. */
|
|
#if !defined(__dietlibc__)
|
|
/* Needed for: glibc */
|
|
/* Not needed for: dietlibc */
|
|
/* Others: ?? (add as needed) */
|
|
#define fdprintf dprintf
|
|
#endif
|
|
|
|
#if defined(__dietlibc__)
|
|
static ALWAYS_INLINE char* strchrnul(const char *s, char c)
|
|
{
|
|
while (*s && *s != c) ++s;
|
|
return (char*)s;
|
|
}
|
|
#endif
|
|
|
|
/* Don't use lchown with glibc older than 2.1.x ... uClibc lacks it */
|
|
#if (defined __GLIBC__ && __GLIBC__ <= 2 && __GLIBC_MINOR__ < 1) || \
|
|
defined __UC_LIBC__
|
|
# define lchown chown
|
|
#endif
|
|
|
|
#if (defined __digital__ && defined __unix__)
|
|
#include <standards.h>
|
|
#define HAVE_STANDARDS_H
|
|
#include <inttypes.h>
|
|
#define HAVE_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
|
|
|
|
/* 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 */
|