| 0,0 → 1,78 |
|---|
| /* |
| * Copyright (c) 2007 Pavel Jancik |
| * 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 libcarm32 |
| * @{ |
| */ |
| /** @file |
| * @brief Syscall routine. |
| */ |
| |
| #include <libc.h> |
| |
| |
| /** Syscall routine. |
| * |
| * Stores p1-p4, id to r0-r4 registers and calls <code>swi</code> |
| * instruction. Returned value is read from r0 register. |
| * |
| * @param p1 Parameter 1. |
| * @param p2 Parameter 2. |
| * @param p3 Parameter 3. |
| * @param p4 Parameter 4. |
| * @param id Number of syscall. |
| * |
| * @return Syscall return value. |
| */ |
| 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 __arm_reg_r0 asm("r0") = p1; |
| register sysarg_t __arm_reg_r1 asm("r1") = p2; |
| register sysarg_t __arm_reg_r2 asm("r2") = p3; |
| register sysarg_t __arm_reg_r3 asm("r3") = p4; |
| register sysarg_t __arm_reg_r4 asm("r4") = p5; |
| register sysarg_t __arm_reg_r5 asm("r5") = p6; |
| register sysarg_t __arm_reg_r6 asm("r6") = id; |
| |
| asm volatile ( "swi" |
| : "=r" (__arm_reg_r0) |
| : "r" (__arm_reg_r0), |
| "r" (__arm_reg_r1), |
| "r" (__arm_reg_r2), |
| "r" (__arm_reg_r3), |
| "r" (__arm_reg_r4), |
| "r" (__arm_reg_r5), |
| "r" (__arm_reg_r6) |
| ); |
| |
| return __arm_reg_r0; |
| } |
| |
| /** @} |
| */ |