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  1. /*
  2.  * Copyright (c) 2007 Pavel Jancik
  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. /** @addtogroup libcarm32
  30.  * @{
  31.  */
  32. /** @file
  33.   * @ingroup libcarm32 
  34.  */
  35.  
  36. #include <libc.h>
  37.  
  38. sysarg_t __syscall(const sysarg_t p1, const sysarg_t p2, const sysarg_t p3,
  39.     const sysarg_t p4, const syscall_t id)
  40. {
  41.     register sysarg_t __arm_reg_r0 asm("r0") = p1;
  42.     register sysarg_t __arm_reg_r1 asm("r1") = p2;
  43.     register sysarg_t __arm_reg_r2 asm("r2") = p3;
  44.     register sysarg_t __arm_reg_r3 asm("r3") = p4;
  45.     register sysarg_t __arm_reg_r4 asm("r4") = id;
  46.  
  47.     asm volatile ( "swi"
  48.         : "=r" (__arm_reg_r0)
  49.         : "r"  (__arm_reg_r0),
  50.           "r"  (__arm_reg_r1),
  51.           "r"  (__arm_reg_r2),
  52.           "r"  (__arm_reg_r3),
  53.           "r"  (__arm_reg_r4)
  54.     );
  55.  
  56.     return __arm_reg_r0; }
  57.  
  58. /** @}
  59.  */
  60.