libc/include/llvm-libc-macros/linux/unistd-macros.h

   1 //===-- Definition of macros from unistd.h --------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #ifndef __LLVM_LIBC_MACROS_LINUX_UNISTD_MACROS_H
  10 #define __LLVM_LIBC_MACROS_LINUX_UNISTD_MACROS_H
  11
  12 // Values for mode argument to the access(...) function.
  13 #define F_OK 0
  14 #define X_OK 1
  15 #define W_OK 2
  16 #define R_OK 4
  17
  18 #define _SC_PAGESIZE 1
  19 #define _SC_PAGE_SIZE _SC_PAGESIZE
  20
  21 // Macro to set up the call to the __llvm_libc_syscall function
  22 // This is to prevent the call from having fewer than 6 arguments, since six
  23 // arguments are always passed to the syscall. Unnecessary arguments are
  24 // ignored.
  25 #define __syscall_helper(sysno, arg1, arg2, arg3, arg4, arg5, arg6, ...)       \
  26   __llvm_libc_syscall((long)(sysno), (long)(arg1), (long)(arg2), (long)(arg3), \
  27                       (long)(arg4), (long)(arg5), (long)(arg6))
  28 #define syscall(...) __syscall_helper(__VA_ARGS__, 0, 1, 2, 3, 4, 5, 6)
  29
  30 #endif // __LLVM_LIBC_MACROS_LINUX_UNISTD_MACROS_H