1  /*
       2   * Copyright (c) 2015-2021 The strace developers.
       3   * All rights reserved.
       4   *
       5   * SPDX-License-Identifier: LGPL-2.1-or-later
       6   */
       7  
       8  /* Return codes: 1 - ok, 0 - ignore, other - error. */
       9  static int
      10  arch_get_scno(struct tcb *tcp)
      11  {
      12  	/* Retrieve the syscall trap instruction. */
      13  	unsigned long trap;
      14  	errno = 0;
      15  	trap = ptrace(PTRACE_PEEKTEXT, tcp->pid, (void *) sparc_regs.tpc, 0);
      16  	if (errno == 0) {
      17  		trap >>= 32;
      18  		switch (trap) {
      19  		case 0x91d02010:
      20  			/* Linux/SPARC syscall trap. */
      21  			update_personality(tcp, 1);
      22  			break;
      23  		case 0x91d0206d:
      24  			/* Linux/SPARC64 syscall trap. */
      25  			update_personality(tcp, 0);
      26  			break;
      27  		}
      28  	}
      29  
      30  	tcp->scno = sparc_regs.u_regs[U_REG_G1];
      31  	return 1;
      32  }