1  /*
       2   * Raw syscalls.
       3   *
       4   * Copyright (c) 2018-2021 The strace developers.
       5   * All rights reserved.
       6   *
       7   * SPDX-License-Identifier: LGPL-2.1-or-later
       8   */
       9  
      10  #ifndef STRACE_RAW_SYSCALL_H
      11  # define STRACE_RAW_SYSCALL_H
      12  
      13  # include "kernel_types.h"
      14  
      15  static inline kernel_ulong_t
      16  raw_syscall_0(const kernel_ulong_t nr, kernel_ulong_t *err)
      17  {
      18  	*err = 0;
      19  	register kernel_ulong_t r8 __asm__("r8") = nr;
      20  	register kernel_ulong_t r0 __asm__("r0");
      21  
      22  # ifdef __A7__
      23  #  define ARC_TRAP_INSN "trap0"
      24  # else
      25  #  define ARC_TRAP_INSN "trap_s 0 "
      26  # endif
      27  
      28  	__asm__ __volatile__(ARC_TRAP_INSN
      29  			     : "=r"(r0)
      30  			     : "r"(r8)
      31  			     : "memory");
      32  
      33  # undef ARC_TRAP_INSN
      34  
      35  	return r0;
      36  }
      37  # define raw_syscall_0 raw_syscall_0
      38  
      39  #endif /* !STRACE_RAW_SYSCALL_H */