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 r28 __asm__("r28");
      20  	__asm__ __volatile__("copy %%r19, %%r4\n\t"
      21  			     "ble 0x100(%%sr2, %%r0)\n\t"
      22  			     "copy %1, %%r20\n\t"
      23  			     "copy %%r4, %%r19\n\t"
      24  			     : "=r"(r28)
      25  			     : "r"(nr)
      26  			     : "memory", "%r1", "%r2", "%r4",
      27  			       "%r21", "%r22", "%r23", "%r24", "%r25", "%r26" );
      28  	return r28;
      29  }
      30  # define raw_syscall_0 raw_syscall_0
      31  
      32  #endif /* !STRACE_RAW_SYSCALL_H */