

#include <bits/wordsize.h>
#include <kernel-features.h>

/* Set error number and return -1.  A target may choose to return the
   internal function, __syscall_error, which sets errno and returns -1.
   We use -1l, instead of -1, so that it can be casted to (void *).  */
#define INLINE_SYSCALL_ERROR_RETURN_VALUE(err)  \
  ({						\
    __set_errno (err);				\
    -1l;					\
  })

/* Provide a dummy argument that can be used to force register
   alignment for register pairs if required by the syscall ABI.  */
#ifdef __ASSUME_ALIGNED_REGISTER_PAIRS
#define __ALIGNMENT_ARG 0,
#define __ALIGNMENT_COUNT(a,b) b
#else
#define __ALIGNMENT_ARG
#define __ALIGNMENT_COUNT(a,b) a
#endif

/* Provide a common macro to pass 64-bit value on syscalls.  */
#if __WORDSIZE == 64 || defined __ASSUME_WORDSIZE64_ILP32
# define SYSCALL_LL(val)   (val)
# define SYSCALL_LL64(val) (val)
#else
#define SYSCALL_LL(val)   \
  __LONG_LONG_PAIR ((val) >> 31, (val))
#define SYSCALL_LL64(val) \
  __LONG_LONG_PAIR ((long) ((val) >> 32), (long) ((val) & 0xffffffff))
#endif

/* Provide a common macro to pass 64-bit value on pread and pwrite
   syscalls.  */
#ifdef __ASSUME_PRW_DUMMY_ARG
# define SYSCALL_LL_PRW(val)   0, SYSCALL_LL (val)
# define SYSCALL_LL64_PRW(val) 0, SYSCALL_LL64 (val)
#else
# define SYSCALL_LL_PRW(val)   __ALIGNMENT_ARG SYSCALL_LL (val)
# define SYSCALL_LL64_PRW(val) __ALIGNMENT_ARG SYSCALL_LL64 (val)
#endif

/* Provide a macro to pass the off{64}_t argument on p{readv,writev}{64}.  */
#define LO_HI_LONG(val) \
 (long) (val), \
 (long) (((uint64_t) (val)) >> 32)

/* Exports the __send symbol on send.c linux implementation (some ABI have
   it missing due the usage of a old generic version without it).  */
#define HAVE_INTERNAL_SEND_SYMBOL	1
