Christopher Ferris | 7c83a1e | 2013-02-26 01:30:00 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2008 The Android Open Source Project |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * * Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * * Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in |
| 12 | * the documentation and/or other materials provided with the |
| 13 | * distribution. |
| 14 | * |
| 15 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 16 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 17 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 18 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| 19 | * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 20 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| 21 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| 22 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| 23 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 24 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| 25 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 26 | * SUCH DAMAGE. |
| 27 | */ |
| 28 | |
Elliott Hughes | 851e68a | 2014-02-19 16:53:20 -0800 | [diff] [blame^] | 29 | #include <private/bionic_asm.h> |
| 30 | #include <private/libc_events.h> |
Christopher Ferris | 7c83a1e | 2013-02-26 01:30:00 -0800 | [diff] [blame] | 31 | |
| 32 | /* |
| 33 | * This code assumes it is running on a processor that supports all arm v7 |
| 34 | * instructions, that supports neon instructions, and that has a 32 byte |
| 35 | * cache line. |
| 36 | */ |
| 37 | |
Christopher Ferris | 5f45d58 | 2013-08-07 13:09:51 -0700 | [diff] [blame] | 38 | .syntax unified |
Christopher Ferris | 7c83a1e | 2013-02-26 01:30:00 -0800 | [diff] [blame] | 39 | .fpu neon |
Christopher Ferris | 5f45d58 | 2013-08-07 13:09:51 -0700 | [diff] [blame] | 40 | .thumb |
| 41 | .thumb_func |
Christopher Ferris | 7c83a1e | 2013-02-26 01:30:00 -0800 | [diff] [blame] | 42 | |
Christopher Ferris | 59a13c1 | 2013-08-01 13:13:33 -0700 | [diff] [blame] | 43 | ENTRY(__memcpy_chk) |
| 44 | cmp r2, r3 |
Christopher Ferris | 16e185c | 2013-09-10 16:56:34 -0700 | [diff] [blame] | 45 | bhi __memcpy_chk_fail |
Christopher Ferris | 59a13c1 | 2013-08-01 13:13:33 -0700 | [diff] [blame] | 46 | |
| 47 | // Fall through to memcpy... |
| 48 | END(__memcpy_chk) |
| 49 | |
Christopher Ferris | 7c83a1e | 2013-02-26 01:30:00 -0800 | [diff] [blame] | 50 | ENTRY(memcpy) |
Christopher Ferris | 5f45d58 | 2013-08-07 13:09:51 -0700 | [diff] [blame] | 51 | pld [r1, #0] |
| 52 | stmfd sp!, {r0, lr} |
Christopher Ferris | a57c9c0 | 2013-08-21 09:41:12 -0700 | [diff] [blame] | 53 | .save {r0, lr} |
Christopher Ferris | 5f45d58 | 2013-08-07 13:09:51 -0700 | [diff] [blame] | 54 | .cfi_def_cfa_offset 8 |
| 55 | .cfi_rel_offset r0, 0 |
| 56 | .cfi_rel_offset lr, 4 |
| 57 | pld [r1, #64] |
Christopher Ferris | 5f45d58 | 2013-08-07 13:09:51 -0700 | [diff] [blame] | 58 | END(memcpy) |
Christopher Ferris | 7c83a1e | 2013-02-26 01:30:00 -0800 | [diff] [blame] | 59 | |
Christopher Ferris | a57c9c0 | 2013-08-21 09:41:12 -0700 | [diff] [blame] | 60 | #define MEMCPY_BASE __memcpy_base |
| 61 | #define MEMCPY_BASE_ALIGNED __memcpy_base_aligned |
| 62 | #include "memcpy_base.S" |
| 63 | |
Nick Kralevich | 32bbf8a | 2013-10-02 16:54:58 -0700 | [diff] [blame] | 64 | ENTRY_PRIVATE(__memcpy_chk_fail) |
Christopher Ferris | 5f45d58 | 2013-08-07 13:09:51 -0700 | [diff] [blame] | 65 | // Preserve lr for backtrace. |
| 66 | push {lr} |
Christopher Ferris | a57c9c0 | 2013-08-21 09:41:12 -0700 | [diff] [blame] | 67 | .save {lr} |
Christopher Ferris | 5f45d58 | 2013-08-07 13:09:51 -0700 | [diff] [blame] | 68 | .cfi_def_cfa_offset 4 |
| 69 | .cfi_rel_offset lr, 0 |
Christopher Ferris | 7c83a1e | 2013-02-26 01:30:00 -0800 | [diff] [blame] | 70 | |
Christopher Ferris | 59a13c1 | 2013-08-01 13:13:33 -0700 | [diff] [blame] | 71 | ldr r0, error_message |
| 72 | ldr r1, error_code |
| 73 | 1: |
| 74 | add r0, pc |
| 75 | bl __fortify_chk_fail |
| 76 | error_code: |
| 77 | .word BIONIC_EVENT_MEMCPY_BUFFER_OVERFLOW |
| 78 | error_message: |
Christopher Ferris | 5f45d58 | 2013-08-07 13:09:51 -0700 | [diff] [blame] | 79 | .word error_string-(1b+4) |
Christopher Ferris | a57c9c0 | 2013-08-21 09:41:12 -0700 | [diff] [blame] | 80 | END(__memcpy_chk_fail) |
Christopher Ferris | 59a13c1 | 2013-08-01 13:13:33 -0700 | [diff] [blame] | 81 | |
| 82 | .data |
| 83 | error_string: |
Elliott Hughes | 68b6711 | 2013-10-15 17:17:05 -0700 | [diff] [blame] | 84 | .string "memcpy: prevented write past end of buffer" |