HelenOS sources

root/uspace/lib/c/arch/ppc32/src/syscall.c

DEFINITIONS

1. __syscall

/*
 * Copyright (c) 2006 Martin Decky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup libcppc32 ppc32
 * @brief ppc32 architecture dependent parts of libc
 * @ingroup lc
 * @{
 */
/** @file
 */

#include <libc.h>

sysarg_t __syscall(const sysarg_t p1, const sysarg_t p2, const sysarg_t p3,
    const sysarg_t p4, const sysarg_t p5, const sysarg_t p6, const syscall_t id)
{
        register sysarg_t __ppc32_reg_r3 asm("3") = p1;
        register sysarg_t __ppc32_reg_r4 asm("4") = p2;
        register sysarg_t __ppc32_reg_r5 asm("5") = p3;
        register sysarg_t __ppc32_reg_r6 asm("6") = p4;
        register sysarg_t __ppc32_reg_r7 asm("7") = p5;
        register sysarg_t __ppc32_reg_r8 asm("8") = p6;
        register sysarg_t __ppc32_reg_r9 asm("9") = id;

        asm volatile (
            "sc\n"
            : "=r" (__ppc32_reg_r3)
            : "r" (__ppc32_reg_r3),
              "r" (__ppc32_reg_r4),
              "r" (__ppc32_reg_r5),
              "r" (__ppc32_reg_r6),
              "r" (__ppc32_reg_r7),
              "r" (__ppc32_reg_r8),
              "r" (__ppc32_reg_r9)
            :
              /*
               * Clobber memory too as some arguments might be
               * actually pointers.
               */
              "memory"
        );

        return __ppc32_reg_r3;
}

/** @}
 */