| // |
| // Licensed to the Apache Software Foundation (ASF) under one or more |
| // contributor license agreements. See the NOTICE file distributed with |
| // this work for additional information regarding copyright ownership. |
| // The ASF licenses this file to You under the Apache License, Version 2.0 |
| // (the "License"); you may not use this file except in compliance with |
| // the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| // |
| .text |
| .align 16 |
| |
| // port_memcpy_asm(void* dst, const void* src, size_t size, |
| // void** prestart_addr, void* memcpyaddr); |
| // 1st arg (RDI) - dest |
| // 2nd arg (RSI) - src |
| // 3rd arg (RDX) - len |
| // 4th arg (RCX) - address of restart_address storage |
| // 5th arg (R8) - address of memcpy - to avoid PIC problems in GNU asm |
| |
| .globl port_memcpy_asm |
| .type port_memcpy_asm, @function |
| port_memcpy_asm: |
| pushq %rbx |
| callq precall |
| precall: |
| popq %rax |
| addq $(preret - precall), %rax |
| movq %rax, (%rcx) |
| |
| callq *%r8 |
| |
| preret: |
| popq %rbx |
| ret |
