| /* |
| * Copyright (C) 2008 The Android Open Source Project |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| #include <machine/asm.h> |
| #include "libc_events.h" |
| |
| /* |
| * This code assumes it is running on a processor that supports all arm v7 |
| * instructions, that supports neon instructions, and that has a 32 byte |
| * cache line. |
| */ |
| |
| .syntax unified |
| .fpu neon |
| .thumb |
| .thumb_func |
| |
| ENTRY(__memcpy_chk) |
| .cfi_startproc |
| cmp r2, r3 |
| bgt __memcpy_chk_fail |
| |
| // Fall through to memcpy... |
| .cfi_endproc |
| END(__memcpy_chk) |
| |
| ENTRY(memcpy) |
| .cfi_startproc |
| |
| pld [r1, #0] |
| stmfd sp!, {r0, lr} |
| .save {r0, lr} |
| .cfi_def_cfa_offset 8 |
| .cfi_rel_offset r0, 0 |
| .cfi_rel_offset lr, 4 |
| pld [r1, #64] |
| |
| .cfi_endproc |
| END(memcpy) |
| |
| #define MEMCPY_BASE __memcpy_base |
| #define MEMCPY_BASE_ALIGNED __memcpy_base_aligned |
| #include "memcpy_base.S" |
| |
| ENTRY(__memcpy_chk_fail) |
| .cfi_startproc |
| // Preserve lr for backtrace. |
| push {lr} |
| .save {lr} |
| .cfi_def_cfa_offset 4 |
| .cfi_rel_offset lr, 0 |
| |
| ldr r0, error_message |
| ldr r1, error_code |
| 1: |
| add r0, pc |
| bl __fortify_chk_fail |
| error_code: |
| .word BIONIC_EVENT_MEMCPY_BUFFER_OVERFLOW |
| error_message: |
| .word error_string-(1b+4) |
| .cfi_endproc |
| END(__memcpy_chk_fail) |
| |
| .data |
| error_string: |
| .string "memcpy buffer overflow" |
