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/*
* 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.
*/
// Prototype: void *memcpy (void *dst, const void *src, size_t count).
#include <private/bionic_asm.h>
#include <private/libc_events.h>
ENTRY(__memcpy_chk)
cmp x2, x3
b.hi __memcpy_chk_fail
// Fall through to memcpy...
b memcpy
END(__memcpy_chk)
.align 6
ENTRY(memcpy)
#include "memcpy_base.S"
END(memcpy)
ENTRY_PRIVATE(__memcpy_chk_fail)
// Preserve for accurate backtrace.
stp x29, x30, [sp, -16]!
.cfi_def_cfa_offset 16
.cfi_rel_offset x29, 0
.cfi_rel_offset x30, 8
adrp x0, error_string
add x0, x0, :lo12:error_string
ldr x1, error_code
bl __fortify_chk_fail
error_code:
.word BIONIC_EVENT_MEMCPY_BUFFER_OVERFLOW
END(__memcpy_chk_fail)
.data
.align 2
error_string:
.string "memcpy: prevented write past end of buffer"
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