| 1,5 → 1,5 |
|---|
| /* |
| * Copyright (c) 2005 Martin Decky |
| * Copyright (c) 2007 Pavel Jancik |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| 30,16 → 30,44 |
|---|
| * @{ |
| */ |
| /** @file |
| * @ingroup libcarm32 |
| * @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 syscall_t id) |
| { |
| /* TODO */ |
| return 0; |
| 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") = 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) |
| ); |
| |
| return __arm_reg_r0; |
| } |
| |
| /** @} |