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73 lines
2.9 KiB
C++
73 lines
2.9 KiB
C++
// Copyright 2015, VIXL authors
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// * Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// * Neither the name of ARM Limited nor the names of its contributors may be
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// used to endorse or promote products derived from this software without
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// specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS CONTRIBUTORS "AS IS" AND
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// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
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// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "test-utils.h"
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#include <sys/mman.h>
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#include "globals-vixl.h"
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#include "a64/cpu-a64.h"
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namespace vixl {
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ExecutableMemory::ExecutableMemory(size_t size)
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: size_(size),
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buffer_(mmap(NULL, size, PROT_READ | PROT_WRITE | PROT_EXEC,
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MAP_SHARED | MAP_ANONYMOUS, -1, 0)) {
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VIXL_ASSERT(reinterpret_cast<intptr_t>(buffer_) != -1);
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}
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ExecutableMemory::~ExecutableMemory() {
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munmap(buffer_, size_);
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}
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void ExecutableMemory::Write(const byte* code_start, size_t code_size) const {
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VIXL_CHECK(code_size <= size_);
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memcpy(buffer_, code_start, size_);
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}
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void ExecutableMemory::Execute(int offset) const {
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void (*test_function)(void);
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VIXL_ASSERT((offset >= 0) && (static_cast<size_t>(offset) < size_));
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VIXL_STATIC_ASSERT(sizeof(buffer_) == sizeof(test_function));
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VIXL_STATIC_ASSERT(sizeof(uintptr_t) == sizeof(test_function));
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uintptr_t entry_point = reinterpret_cast<uintptr_t>(buffer_);
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entry_point += offset;
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memcpy(&test_function, &entry_point, sizeof(test_function));
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#if defined(__aarch64__)
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aarch64::CPU::EnsureIAndDCacheCoherency(buffer_, size_);
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#elif defined(__arm__)
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// TODO: Do not use __builtin___clear_cache and instead implement
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// `CPU::EnsureIAndDCacheCoherency` for aarch32.
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__builtin___clear_cache(buffer_, reinterpret_cast<char*>(buffer_) + size_);
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#endif
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test_function();
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}
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} // namespace vixl
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