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  	register kernel_ulong_t r0 __asm__("r0") = nr;
      19  	register kernel_ulong_t r3 __asm__("r3");
      20  	__asm__ __volatile__("sc\n\t"
      21  			     "mfcr %0"
      22  			     : "+r"(r0), "=r"(r3)
      23  			     :
      24  			     : "memory", "cr0", "ctr", "lr",
      25  			       "r4", "r5", "r6", "r7", "r8",
      26  			       "r9", "r10", "r11", "r12");
      27  	*err = !!(r0 & 0x10000000);
      28  	return r3;
      29  }
      30  # define raw_syscall_0 raw_syscall_0
      31  
      32  #endif /* !STRACE_RAW_SYSCALL_H */