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Diffstat (limited to 'src/3rdparty/javascriptcore/JavaScriptCore/assembler/LinkBuffer.h')
| -rw-r--r-- | src/3rdparty/javascriptcore/JavaScriptCore/assembler/LinkBuffer.h | 195 |
1 files changed, 0 insertions, 195 deletions
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/assembler/LinkBuffer.h b/src/3rdparty/javascriptcore/JavaScriptCore/assembler/LinkBuffer.h deleted file mode 100644 index 6d08117..0000000 --- a/src/3rdparty/javascriptcore/JavaScriptCore/assembler/LinkBuffer.h +++ /dev/null @@ -1,195 +0,0 @@ -/* - * Copyright (C) 2009 Apple Inc. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. 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 APPLE INC. ``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 APPLE INC. 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. - */ - -#ifndef LinkBuffer_h -#define LinkBuffer_h - -#include <wtf/Platform.h> - -#if ENABLE(ASSEMBLER) - -#include <MacroAssembler.h> -#include <wtf/Noncopyable.h> - -namespace JSC { - -// LinkBuffer: -// -// This class assists in linking code generated by the macro assembler, once code generation -// has been completed, and the code has been copied to is final location in memory. At this -// time pointers to labels within the code may be resolved, and relative offsets to external -// addresses may be fixed. -// -// Specifically: -// * Jump objects may be linked to external targets, -// * The address of Jump objects may taken, such that it can later be relinked. -// * The return address of a Call may be acquired. -// * The address of a Label pointing into the code may be resolved. -// * The value referenced by a DataLabel may be set. -// -class LinkBuffer : public Noncopyable { - typedef MacroAssemblerCodeRef CodeRef; - typedef MacroAssembler::Label Label; - typedef MacroAssembler::Jump Jump; - typedef MacroAssembler::JumpList JumpList; - typedef MacroAssembler::Call Call; - typedef MacroAssembler::DataLabel32 DataLabel32; - typedef MacroAssembler::DataLabelPtr DataLabelPtr; - -public: - // Note: Initialization sequence is significant, since executablePool is a PassRefPtr. - // First, executablePool is copied into m_executablePool, then the initialization of - // m_code uses m_executablePool, *not* executablePool, since this is no longer valid. - LinkBuffer(MacroAssembler* masm, PassRefPtr<ExecutablePool> executablePool) - : m_executablePool(executablePool) - , m_code(masm->m_assembler.executableCopy(m_executablePool.get())) - , m_size(masm->m_assembler.size()) -#ifndef NDEBUG - , m_completed(false) -#endif - { - } - - ~LinkBuffer() - { - ASSERT(m_completed); - } - - // These methods are used to link or set values at code generation time. - - void link(Call call, FunctionPtr function) - { - ASSERT(call.isFlagSet(Call::Linkable)); - MacroAssembler::linkCall(code(), call, function); - } - - void link(Jump jump, CodeLocationLabel label) - { - MacroAssembler::linkJump(code(), jump, label); - } - - void link(JumpList list, CodeLocationLabel label) - { - for (unsigned i = 0; i < list.m_jumps.size(); ++i) - MacroAssembler::linkJump(code(), list.m_jumps[i], label); - } - - void patch(DataLabelPtr label, void* value) - { - MacroAssembler::linkPointer(code(), label.m_label, value); - } - - void patch(DataLabelPtr label, CodeLocationLabel value) - { - MacroAssembler::linkPointer(code(), label.m_label, value.executableAddress()); - } - - // These methods are used to obtain handles to allow the code to be relinked / repatched later. - - CodeLocationCall locationOf(Call call) - { - ASSERT(call.isFlagSet(Call::Linkable)); - ASSERT(!call.isFlagSet(Call::Near)); - return CodeLocationCall(MacroAssembler::getLinkerAddress(code(), call.m_jmp)); - } - - CodeLocationNearCall locationOfNearCall(Call call) - { - ASSERT(call.isFlagSet(Call::Linkable)); - ASSERT(call.isFlagSet(Call::Near)); - return CodeLocationNearCall(MacroAssembler::getLinkerAddress(code(), call.m_jmp)); - } - - CodeLocationLabel locationOf(Label label) - { - return CodeLocationLabel(MacroAssembler::getLinkerAddress(code(), label.m_label)); - } - - CodeLocationDataLabelPtr locationOf(DataLabelPtr label) - { - return CodeLocationDataLabelPtr(MacroAssembler::getLinkerAddress(code(), label.m_label)); - } - - CodeLocationDataLabel32 locationOf(DataLabel32 label) - { - return CodeLocationDataLabel32(MacroAssembler::getLinkerAddress(code(), label.m_label)); - } - - // This method obtains the return address of the call, given as an offset from - // the start of the code. - unsigned returnAddressOffset(Call call) - { - return MacroAssembler::getLinkerCallReturnOffset(call); - } - - // Upon completion of all patching either 'finalizeCode()' or 'finalizeCodeAddendum()' should be called - // once to complete generation of the code. 'finalizeCode()' is suited to situations - // where the executable pool must also be retained, the lighter-weight 'finalizeCodeAddendum()' is - // suited to adding to an existing allocation. - CodeRef finalizeCode() - { - performFinalization(); - - return CodeRef(m_code, m_executablePool, m_size); - } - CodeLocationLabel finalizeCodeAddendum() - { - performFinalization(); - - return CodeLocationLabel(code()); - } - -private: - // Keep this private! - the underlying code should only be obtained externally via - // finalizeCode() or finalizeCodeAddendum(). - void* code() - { - return m_code; - } - - void performFinalization() - { -#ifndef NDEBUG - ASSERT(!m_completed); - m_completed = true; -#endif - - ExecutableAllocator::makeExecutable(code(), m_size); - ExecutableAllocator::cacheFlush(code(), m_size); - } - - RefPtr<ExecutablePool> m_executablePool; - void* m_code; - size_t m_size; -#ifndef NDEBUG - bool m_completed; -#endif -}; - -} // namespace JSC - -#endif // ENABLE(ASSEMBLER) - -#endif // LinkBuffer_h |