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  1. /*
  2.  * Copyright (C) 2006 Martin Decky
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. #include <libc.h>
  30.  
  31. sysarg_t __syscall(const sysarg_t p1, const sysarg_t p2, const sysarg_t p3, const sysarg_t p4, const syscall_t id)
  32. {
  33.     register sysarg_t __ppc32_reg_r3 asm("3") = p1;
  34.     register sysarg_t __ppc32_reg_r4 asm("4") = p2;
  35.     register sysarg_t __ppc32_reg_r5 asm("5") = p3;
  36.     register sysarg_t __ppc32_reg_r6 asm("6") = p4;
  37.     register sysarg_t __ppc32_reg_r7 asm("7") = id;
  38.    
  39.     asm volatile (
  40.         "sc\n"
  41.         : "=r" (__ppc32_reg_r3)
  42.         : "r" (__ppc32_reg_r3),
  43.           "r" (__ppc32_reg_r4),
  44.           "r" (__ppc32_reg_r5),
  45.           "r" (__ppc32_reg_r6),
  46.           "r" (__ppc32_reg_r7)
  47.     );
  48.    
  49.     return __ppc32_reg_r3;
  50. }
  51.