| // | |
| // Copyright (c) 2016 - 2017, ARM Limited. All rights reserved. | |
| // | |
| // This program and the accompanying materials | |
| // are licensed and made available under the terms and conditions of the BSD License | |
| // which accompanies this distribution. The full text of the license may be found at | |
| // http://opensource.org/licenses/bsd-license.php | |
| // | |
| // THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
| // WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
| // | |
| // | |
| INCLUDE AsmMacroExport.inc | |
| RVCT_ASM_EXPORT ArmCallSvc | |
| // r0 will be popped just after the SVC call | |
| push {r0, r4-r8} | |
| // Load the SVC arguments values into the appropriate registers | |
| ldm r0, {r0-r7} | |
| svc #0 | |
| // Load the ARM_SVC_ARGS structure address from the stack into r8 | |
| ldr r8, [sp] | |
| // Load the SVC returned values into the appropriate registers | |
| // A SVC call can return up to 4 values - we do not need to store back r4-r7. | |
| stm r8, {r0-r3} | |
| mov r0, r8 | |
| // Restore the registers r4-r8 | |
| pop {r1, r4-r8} | |
| bx lr | |
| END |