2008-09-09 20:08:45 +00:00
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// Copyright 2006-2008 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_ARM_FRAMES_ARM_H_
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#define V8_ARM_FRAMES_ARM_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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// The ARM ABI does not specify the usage of register r9, which may be reserved
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// as the static base or thread register on some platforms, in which case we
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// leave it alone. Adjust the value of kR9Available accordingly:
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static const int kR9Available = 1; // 1 if available to us, 0 if reserved
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// Register list in load/store instructions
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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 = 16;
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// Caller-saved/arguments registers
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static const RegList kJSCallerSaved =
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1 << 0 | // r0 a1
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1 << 1 | // r1 a2
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1 << 2 | // r2 a3
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1 << 3; // r3 a4
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static const int kNumJSCallerSaved = 4;
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typedef Object* JSCallerSavedBuffer[kNumJSCallerSaved];
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// Return the code of the n-th caller-saved register available to JavaScript
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// e.g. JSCallerSavedReg(0) returns r0.code() == 0
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int JSCallerSavedCode(int n);
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// Callee-saved registers preserved when switching from C to JavaScript
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2008-07-30 08:49:36 +00:00
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static const RegList kCalleeSaved =
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1 << 4 | // r4 v1
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1 << 5 | // r5 v2
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1 << 6 | // r6 v3
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1 << 7 | // r7 v4
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2008-07-03 15:10:15 +00:00
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1 << 8 | // r8 v5 (cp in JavaScript code)
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2008-07-30 08:49:36 +00:00
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kR9Available
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<< 9 | // r9 v6
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2009-06-10 15:08:25 +00:00
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1 << 10 | // r10 v7
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2008-08-13 09:32:07 +00:00
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1 << 11; // r11 v8 (fp in JavaScript code)
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2008-07-03 15:10:15 +00:00
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2008-07-30 08:49:36 +00:00
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static const int kNumCalleeSaved = 7 + kR9Available;
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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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2009-06-10 09:00:07 +00:00
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static const int kNextOffset = 0 * kPointerSize;
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static const int kStateOffset = 1 * kPointerSize;
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static const int kFPOffset = 2 * kPointerSize;
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static const int kPCOffset = 3 * kPointerSize;
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2008-07-03 15:10:15 +00:00
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static const int kSize = kPCOffset + kPointerSize;
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};
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class EntryFrameConstants : public AllStatic {
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public:
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2008-09-12 03:29:06 +00:00
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static const int kCallerFPOffset = -3 * kPointerSize;
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2008-07-03 15:10:15 +00:00
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};
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class ExitFrameConstants : public AllStatic {
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public:
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// Exit frames have a debug marker on the stack.
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static const int kSPDisplacement = -1 * kPointerSize;
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// The debug marker is just above the frame pointer.
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static const int kDebugMarkOffset = -1 * kPointerSize;
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static const int kSavedRegistersOffset = 0 * kPointerSize;
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2008-07-30 08:49:36 +00:00
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// The caller fields are below the frame pointer on the stack.
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2008-09-12 03:29:06 +00:00
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static const int kCallerFPOffset = +0 * kPointerSize;
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2009-06-10 15:08:25 +00:00
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// The calling JS function is between FP and PC.
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2008-09-12 03:29:06 +00:00
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static const int kCallerPCOffset = +2 * 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 = +3 * 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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2008-09-12 03:29:06 +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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2008-07-03 15:10:15 +00:00
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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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2008-09-12 03:29:06 +00:00
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static const int kSavedRegistersOffset = +2 * kPointerSize;
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static const int kFunctionOffset = StandardFrameConstants::kMarkerOffset;
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2008-07-03 15:10:15 +00:00
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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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2008-09-12 03:29:06 +00:00
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class ArgumentsAdaptorFrameConstants : public AllStatic {
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public:
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2008-09-12 03:29:06 +00:00
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static const int kLengthOffset = StandardFrameConstants::kExpressionsOffset;
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2008-07-03 15:10:15 +00:00
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};
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2008-09-12 03:29:06 +00:00
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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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2008-07-03 15:10:15 +00:00
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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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2008-07-03 15:10:15 +00:00
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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_ARM_FRAMES_ARM_H_
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