Rev 2128 | Rev 2479 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2128 | jermar | 1 | /* |
| 2465 | jermar | 2 | * Copyright (c) 2007 Pavel Jancik |
| 2128 | jermar | 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 |
||
| 2465 | jermar | 33 | * @brief Syscall routine. |
| 2128 | jermar | 34 | */ |
| 35 | |||
| 36 | #include <libc.h> |
||
| 37 | |||
| 2465 | jermar | 38 | |
| 39 | /** Syscall routine. |
||
| 40 | * |
||
| 41 | * Stores p1-p4, id to r0-r4 registers and calls <code>swi</code> |
||
| 42 | * instruction. Returned value is read from r0 register. |
||
| 43 | * |
||
| 44 | * @param p1 Parameter 1. |
||
| 45 | * @param p2 Parameter 2. |
||
| 46 | * @param p3 Parameter 3. |
||
| 47 | * @param p4 Parameter 4. |
||
| 48 | * @param id Number of syscall. |
||
| 49 | * |
||
| 50 | * @return Syscall return value. |
||
| 51 | */ |
||
| 2128 | jermar | 52 | sysarg_t __syscall(const sysarg_t p1, const sysarg_t p2, const sysarg_t p3, |
| 53 | const sysarg_t p4, const syscall_t id) |
||
| 54 | { |
||
| 2465 | jermar | 55 | register sysarg_t __arm_reg_r0 asm("r0") = p1; |
| 56 | register sysarg_t __arm_reg_r1 asm("r1") = p2; |
||
| 57 | register sysarg_t __arm_reg_r2 asm("r2") = p3; |
||
| 58 | register sysarg_t __arm_reg_r3 asm("r3") = p4; |
||
| 59 | register sysarg_t __arm_reg_r4 asm("r4") = id; |
||
| 60 | |||
| 61 | asm volatile ( "swi" |
||
| 62 | : "=r" (__arm_reg_r0) |
||
| 63 | : "r" (__arm_reg_r0), |
||
| 64 | "r" (__arm_reg_r1), |
||
| 65 | "r" (__arm_reg_r2), |
||
| 66 | "r" (__arm_reg_r3), |
||
| 67 | "r" (__arm_reg_r4) |
||
| 68 | ); |
||
| 69 | |||
| 70 | return __arm_reg_r0; |
||
| 2128 | jermar | 71 | } |
| 72 | |||
| 73 | /** @} |
||
| 74 | */ |