2011-08-12 10:52:49 +00:00
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// Copyright 2011 the V8 project authors. All rights reserved.
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2008-07-03 15:10:15 +00:00
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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
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (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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2009-05-04 13:36:43 +00:00
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#ifndef V8_IA32_FRAMES_IA32_H_
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#define V8_IA32_FRAMES_IA32_H_
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2008-07-03 15:10:15 +00:00
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2009-05-25 10:05:56 +00:00
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namespace v8 {
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namespace internal {
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2008-07-03 15:10:15 +00:00
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// Register lists
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// Note that the bit values must match those used in actual instruction encoding
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static const int kNumRegs = 8;
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// Caller-saved registers
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static const RegList kJSCallerSaved =
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1 << 0 | // eax
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1 << 1 | // ecx
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1 << 2 | // edx
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1 << 3 | // ebx - used as a caller-saved register in JavaScript code
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1 << 7; // edi - callee function
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static const int kNumJSCallerSaved = 5;
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typedef Object* JSCallerSavedBuffer[kNumJSCallerSaved];
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2010-12-07 11:31:57 +00:00
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// Number of registers for which space is reserved in safepoints.
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static const int kNumSafepointRegisters = 8;
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2008-07-03 15:10:15 +00:00
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// ----------------------------------------------------
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class StackHandlerConstants : public AllStatic {
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public:
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2011-11-11 13:48:14 +00:00
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static const int kNextOffset = 0 * kPointerSize;
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static const int kCodeOffset = 1 * kPointerSize;
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static const int kStateOffset = 2 * kPointerSize;
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static const int kContextOffset = 3 * kPointerSize;
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static const int kFPOffset = 4 * kPointerSize;
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2008-07-03 15:10:15 +00:00
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2011-11-11 13:48:14 +00:00
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static const int kSize = kFPOffset + kPointerSize;
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2008-07-03 15:10:15 +00:00
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};
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class EntryFrameConstants : public AllStatic {
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public:
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static const int kCallerFPOffset = -6 * kPointerSize;
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static const int kFunctionArgOffset = +3 * kPointerSize;
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static const int kReceiverArgOffset = +4 * kPointerSize;
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static const int kArgcOffset = +5 * kPointerSize;
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static const int kArgvOffset = +6 * kPointerSize;
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};
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class ExitFrameConstants : public AllStatic {
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public:
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2011-05-13 10:58:25 +00:00
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static const int kCodeOffset = -2 * kPointerSize;
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static const int kSPOffset = -1 * kPointerSize;
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2008-07-03 15:10:15 +00:00
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static const int kCallerFPOffset = 0 * kPointerSize;
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static const int kCallerPCOffset = +1 * kPointerSize;
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2009-06-10 15:08:25 +00:00
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// FP-relative displacement of the caller's SP. It points just
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// below the saved PC.
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static const int kCallerSPDisplacement = +2 * kPointerSize;
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2008-07-03 15:10:15 +00:00
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};
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class StandardFrameConstants : public AllStatic {
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public:
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2011-05-13 10:58:25 +00:00
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// StandardFrame::IterateExpressions assumes that kContextOffset is the last
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// object pointer.
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static const int kFixedFrameSize = 4; // Currently unused.
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2008-07-03 15:10:15 +00:00
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static const int kExpressionsOffset = -3 * kPointerSize;
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static const int kMarkerOffset = -2 * kPointerSize;
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static const int kContextOffset = -1 * kPointerSize;
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static const int kCallerFPOffset = 0 * kPointerSize;
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static const int kCallerPCOffset = +1 * kPointerSize;
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static const int kCallerSPOffset = +2 * kPointerSize;
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};
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class JavaScriptFrameConstants : public AllStatic {
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public:
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// FP-relative.
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static const int kLocal0Offset = StandardFrameConstants::kExpressionsOffset;
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2011-04-01 11:41:36 +00:00
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static const int kLastParameterOffset = +2 * kPointerSize;
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2008-07-03 15:10:15 +00:00
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static const int kFunctionOffset = StandardFrameConstants::kMarkerOffset;
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2009-06-10 15:08:25 +00:00
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// Caller SP-relative.
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2008-07-03 15:10:15 +00:00
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static const int kParam0Offset = -2 * kPointerSize;
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static const int kReceiverOffset = -1 * kPointerSize;
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};
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class ArgumentsAdaptorFrameConstants : public AllStatic {
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public:
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static const int kLengthOffset = StandardFrameConstants::kExpressionsOffset;
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};
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class InternalFrameConstants : public AllStatic {
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public:
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static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset;
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};
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2009-03-20 14:49:12 +00:00
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inline Object* JavaScriptFrame::function_slot_object() const {
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const int offset = JavaScriptFrameConstants::kFunctionOffset;
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2009-03-20 14:49:12 +00:00
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return Memory::Object_at(fp() + offset);
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2008-07-03 15:10:15 +00:00
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}
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} } // namespace v8::internal
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2009-05-04 13:36:43 +00:00
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#endif // V8_IA32_FRAMES_IA32_H_
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