libc/src/__support/OSUtil/linux/syscall.h

   1 //===----------------------- Linux syscalls ---------------------*- C++ -*-===//
   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_SRC___SUPPORT_OSUTIL_LINUX_SYSCALL_H
  10 #define LLVM_LIBC_SRC___SUPPORT_OSUTIL_LINUX_SYSCALL_H
  11
  12 #include "src/__support/CPP/bit.h"
  13 #include "src/__support/common.h"
  14 #include "src/__support/macros/properties/architectures.h"
  15
  16 #ifdef LIBC_TARGET_ARCH_IS_X86_64
  17 #include "x86_64/syscall.h"
  18 #elif defined(LIBC_TARGET_ARCH_IS_AARCH64)
  19 #include "aarch64/syscall.h"
  20 #elif defined(LIBC_TARGET_ARCH_IS_ARM)
  21 #include "arm/syscall.h"
  22 #elif defined(LIBC_TARGET_ARCH_IS_ANY_RISCV)
  23 #include "riscv/syscall.h"
  24 #endif
  25
  26 namespace LIBC_NAMESPACE {
  27
  28 template <typename R, typename... Ts>
  29 LIBC_INLINE R syscall_impl(long __number, Ts... ts) {
  30   static_assert(sizeof...(Ts) <= 6, "Too many arguments for syscall");
  31   return cpp::bit_or_static_cast<R>(syscall_impl(__number, (long)ts...));
  32 }
  33
  34 } // namespace LIBC_NAMESPACE
  35
  36 #endif // LLVM_LIBC_SRC___SUPPORT_OSUTIL_LINUX_SYSCALL_H