#define UNUSED_PARAM __attribute__ ((__unused__))
#define NORETURN __attribute__ ((__noreturn__))
+
+#if __GNUC_PREREQ(4,5)
+# define bb_unreachable(altcode) __builtin_unreachable()
+#else
+# define bb_unreachable(altcode) altcode
+#endif
+
/* "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
# define UNUSED_PARAM_RESULT
#endif
-/* used by unit test machinery to run registration functions */
-#define INIT_LAST __attribute__ ((constructor(2000)))
+/* used by unit test machinery to run registration functions before calling main() */
+#define INIT_FUNC __attribute__ ((constructor))
/* -fwhole-program makes all symbols local. The attribute externally_visible
* forces a symbol global. */
* 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__)? */
+ * only if you need to match a function pointer's type.
+ * FAST_FUNC may not work well with -flto so allow user to disable this.
+ * (-DFAST_FUNC= )
+ */
+#ifndef FAST_FUNC
+# if __GNUC_PREREQ(3,0) && defined(i386)
/* stdcall makes callee to pop arguments from stack, not caller */
-# define FAST_FUNC __attribute__((regparm(3),stdcall))
+# define FAST_FUNC __attribute__((regparm(3),stdcall))
/* #elif ... - add your favorite arch today! */
-#else
-# define FAST_FUNC
+# else
+# define FAST_FUNC
+# endif
#endif
/* Make all declarations hidden (-fvisibility flag only affects definitions) */
* a lvalue. This makes it more likely to not swap them by mistake
*/
#if defined(i386) || defined(__x86_64__) || defined(__powerpc__)
+# define BB_UNALIGNED_MEMACCESS_OK 1
# define move_from_unaligned_int(v, intp) ((v) = *(bb__aliased_int*)(intp))
# define move_from_unaligned_long(v, longp) ((v) = *(bb__aliased_long*)(longp))
# define move_from_unaligned16(v, u16p) ((v) = *(bb__aliased_uint16_t*)(u16p))
# define move_to_unaligned32(u32p, v) (*(bb__aliased_uint32_t*)(u32p) = (v))
/* #elif ... - add your favorite arch today! */
#else
+# define BB_UNALIGNED_MEMACCESS_OK 0
/* performs reasonably well (gcc usually inlines memcpy here) */
# define move_from_unaligned_int(v, intp) (memcpy(&(v), (intp), sizeof(int)))
# define move_from_unaligned_long(v, longp) (memcpy(&(v), (longp), sizeof(long)))
} while (0)
#endif
+/* Unaligned, fixed-endian accessors */
+#define get_unaligned_le32(buf) ({ uint32_t v; move_from_unaligned32(v, buf); SWAP_LE32(v); })
+#define get_unaligned_be32(buf) ({ uint32_t v; move_from_unaligned32(v, buf); SWAP_BE32(v); })
+#define put_unaligned_le32(val, buf) move_to_unaligned32(buf, SWAP_LE32(val))
+#define put_unaligned_be32(val, buf) move_to_unaligned32(buf, SWAP_BE32(val))
+
+/* unxz needs an aligned fixed-endian accessor.
+ * (however, the compiler does not realize it's aligned, the cast is still necessary)
+ */
+#define get_le32(u32p) ({ uint32_t v = *(bb__aliased_uint32_t*)(u32p); SWAP_LE32(v); })
+
/* ---- Size-saving "small" ints (arch-dependent) ----------- */
#define HAVE_DPRINTF 1
#define HAVE_MEMRCHR 1
#define HAVE_MKDTEMP 1
+#define HAVE_TTYNAME_R 1
#define HAVE_PTSNAME_R 1
#define HAVE_SETBIT 1
#define HAVE_SIGHANDLER_T 1
#define HAVE_STPCPY 1
+#define HAVE_MEMPCPY 1
#define HAVE_STRCASESTR 1
#define HAVE_STRCHRNUL 1
#define HAVE_STRSEP 1
#define HAVE_MNTENT_H 1
#define HAVE_NET_ETHERNET_H 1
#define HAVE_SYS_STATFS_H 1
+#define HAVE_PRINTF_PERCENTM 1
#if defined(__UCLIBC__)
# if UCLIBC_VERSION < KERNEL_VERSION(0, 9, 32)
# undef HAVE_DPRINTF
# undef HAVE_UNLOCKED_STDIO
# undef HAVE_UNLOCKED_LINE_OPS
+# undef HAVE_PRINTF_PERCENTM
#endif
#if defined(__dietlibc__)
#endif
#if defined(__FreeBSD__)
+/* users say mempcpy is not present in FreeBSD 9.x */
+# undef HAVE_MEMPCPY
# undef HAVE_CLEARENV
# undef HAVE_FDATASYNC
# undef HAVE_MNTENT_H
# undef HAVE_STRVERSCMP
# undef HAVE_XTABS
# undef HAVE_UNLOCKED_LINE_OPS
+# undef HAVE_PRINTF_PERCENTM
# include <osreldate.h>
# if __FreeBSD_version < 1000029
# undef HAVE_STRCHRNUL /* FreeBSD added strchrnul() between 1000028 and 1000029 */
#endif
#if defined(ANDROID) || defined(__ANDROID__)
-# undef HAVE_DPRINTF
-# undef HAVE_GETLINE
-# undef HAVE_STPCPY
+# if __ANDROID_API__ < 8
+ /* ANDROID < 8 has no [f]dprintf at all */
+# undef HAVE_DPRINTF
+# elif __ANDROID_API__ < 21
+ /* ANDROID < 21 has fdprintf */
+# define dprintf fdprintf
+# else
+ /* ANDROID >= 21 has standard dprintf */
+# endif
+# if __ANDROID_API__ < 21
+# undef HAVE_TTYNAME_R
+# undef HAVE_GETLINE
+# undef HAVE_STPCPY
+# endif
+# undef HAVE_MEMPCPY
# undef HAVE_STRCHRNUL
# undef HAVE_STRVERSCMP
# undef HAVE_UNLOCKED_LINE_OPS
# undef HAVE_NET_ETHERNET_H
+# undef HAVE_PRINTF_PERCENTM
#endif
/*
extern char *mkdtemp(char *template) FAST_FUNC;
#endif
+#ifndef HAVE_TTYNAME_R
+#define ttyname_r bb_ttyname_r
+extern int ttyname_r(int fd, char *buf, size_t buflen);
+#endif
+
#ifndef HAVE_SETBIT
# define setbit(a, b) ((a)[(b) >> 3] |= 1 << ((b) & 7))
# define clrbit(a, b) ((a)[(b) >> 3] &= ~(1 << ((b) & 7)))
extern char *stpcpy(char *p, const char *to_add) FAST_FUNC;
#endif
+#ifndef HAVE_MEMPCPY
+#include <string.h>
+/* In case we are wrong about !HAVE_MEMPCPY, and toolchain _does_ have
+ * mempcpy(), avoid colliding with it:
+ */
+#define mempcpy bb__mempcpy
+static ALWAYS_INLINE void *mempcpy(void *dest, const void *src, size_t len)
+{
+ return memcpy(dest, src, len) + len;
+}
+#endif
+
#ifndef HAVE_STRCASESTR
extern char *strcasestr(const char *s, const char *pattern) FAST_FUNC;
#endif
projects / oweals / busybox.git / blobdiff