| // Copyright 2017 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "asm.h" |
| |
| // %rax = memcpy(%rdi, %rsi, %rdx) |
| ENTRY(memcpy) |
| // Save return value. |
| mov %rdi, %rax |
| |
| mov %rdx, %rcx |
| rep movsb // while (rcx-- > 0) *rdi++ = *rsi++; |
| |
| ret |
| END(memcpy) |
| |
| #ifdef HIDDEN |
| .hidden memcpy |
| #else |
| ALIAS(memcpy, __unsanitized_memcpy) |
| ASAN_WEAK_ALIAS(memcpy) |
| #endif |
| ALIAS(memcpy, __memcpy_fwd) |
| .hidden __memcpy_fwd |
| |
| // This name is called from inside libc to avoid going through the PLT. |
| .hidden __libc_memcpy |
| ALIAS(memcpy, __libc_memcpy) |
