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main_repo / deps / v8 / src / frames-ia32.h @ 40c0f755
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// Copyright 2006-2008 the V8 project authors. All rights reserved.
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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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#ifndef V8_FRAMES_IA32_H_
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#define V8_FRAMES_IA32_H_
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namespace v8 { namespace internal { |
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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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// ----------------------------------------------------
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class StackHandlerConstants : public AllStatic { |
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public:
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static const int kNextOffset = 0 * kPointerSize; |
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static const int kPPOffset = 1 * kPointerSize; |
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static const int kFPOffset = 2 * kPointerSize; |
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// TODO(1233780): Get rid of the code slot in stack handlers.
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static const int kCodeOffset = 3 * kPointerSize; |
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static const int kStateOffset = 4 * kPointerSize; |
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static const int kPCOffset = 5 * kPointerSize; |
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static const int kAddressDisplacement = -1 * kPointerSize; |
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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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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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static const int kDebugMarkOffset = -2 * kPointerSize; |
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static const int kSPOffset = -1 * kPointerSize; |
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// Let the parameters pointer for exit frames point just below the
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// frame structure on the stack (frame pointer and return address).
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static const int kPPDisplacement = +2 * 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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}; |
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class StandardFrameConstants : public AllStatic { |
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public:
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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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static const int kSavedRegistersOffset = +2 * kPointerSize; |
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static const int kFunctionOffset = StandardFrameConstants::kMarkerOffset; |
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// CallerSP-relative (aka PP-relative)
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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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inline Object* JavaScriptFrame::function_slot_object() const { |
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const int offset = JavaScriptFrameConstants::kFunctionOffset; |
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return Memory::Object_at(fp() + offset);
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} |
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// ----------------------------------------------------
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// C Entry frames:
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// lower | Stack |
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// addresses | ^ |
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// | | |
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// | |
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// +-------------+
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// | entry_pc |
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// +-------------+ <--+ entry_sp
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// . |
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// . |
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// . |
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// +-------------+ |
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// -3 | entry_sp --+----+
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// e +-------------+
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// n -2 | C function |
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// t +-------------+
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// r -1 | caller_pp |
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// y +-------------+ <--- fp (frame pointer, ebp)
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// 0 | caller_fp |
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// f +-------------+
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// r 1 | caller_pc |
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// a +-------------+ <--- caller_sp (stack pointer, esp)
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// m 2 | |
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// e | arguments |
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// | |
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// +- - - - - - -+
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// | argument0 |
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// +=============+
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// | |
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// | caller |
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// higher | expressions |
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// addresses | |
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// Proper JS frames:
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// lower | Stack |
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// addresses | ^ |
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// | | |
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// | |
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// ----------- +=============+ <--- sp (stack pointer, esp)
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// | function |
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// +-------------+
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// | |
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// | expressions |
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// | |
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// +-------------+
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// a | |
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// c | locals |
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// t | |
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// i +- - - - - - -+ <---
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// v -4 | local0 | ^
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// a +-------------+ |
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// t -3 | code | |
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// i +-------------+ |
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// o -2 | context | | kLocal0Offset
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// n +-------------+ |
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// -1 | caller_pp | v
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// f +-------------+ <--- fp (frame pointer, ebp)
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// r 0 | caller_fp |
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// a +-------------+
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// m 1 | caller_pc |
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// e +-------------+ <--- caller_sp (incl. parameters)
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// 2 | |
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// | parameters |
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// | |
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// +- - - - - - -+ <---
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// -2 | parameter0 | ^
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// +-------------+ | kParam0Offset
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// -1 | receiver | v
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// ----------- +=============+ <--- pp (parameter pointer, edi)
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// 0 | function |
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// +-------------+
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// | |
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// | caller |
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// higher | expressions |
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// addresses | |
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// JS entry frames: When calling from C to JS, we construct two extra
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// frames: An entry frame (C) and a trampoline frame (JS). The
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// following pictures shows the two frames:
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// lower | Stack |
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// addresses | ^ |
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// | | |
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// | |
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// ----------- +=============+ <--- sp (stack pointer, esp)
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// | |
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// | parameters |
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// t | |
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// r +- - - - - - -+
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// a | parameter0 |
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// m +-------------+
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// p | receiver |
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// o +-------------+ <---
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// l | function | ^
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// i +-------------+ |
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// n -3 | code | | kLocal0Offset
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// e +-------------+
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// -2 | NULL | context is always NULL
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// +-------------+
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// f -1 | NULL | caller pp is always NULL for entry frames
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// r +-------------+ <--- fp (frame pointer, ebp)
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// a 0 | caller fp |
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// m +-------------+
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// e 1 | caller pc |
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// +-------------+ <--- caller_sp (incl. parameters)
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// | 0 |
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// ----------- +=============+ <--- pp (parameter pointer, edi)
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// | 0 |
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// +-------------+ <---
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// . ^
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// . | try-handler (HandlerOffsets::kSize)
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// . v
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// +-------------+ <---
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// -5 | next top pp |
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// +-------------+
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// e -4 | next top fp |
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// n +-------------+ <---
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// t -3 | ebx | ^
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// r +-------------+ |
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// y -2 | esi | | callee-saved registers
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// +-------------+ |
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// -1 | edi | v
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// f +-------------+ <--- fp
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// r 0 | caller fp |
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// a +-------------+ pp == NULL (parameter pointer)
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// m 1 | caller pc |
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// e +-------------+ <--- caller sp
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// 2 | code entry | ^
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// +-------------+ |
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// 3 | function | |
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// +-------------+ | arguments passed from C code
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// 4 | receiver | |
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// +-------------+ |
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// 5 | argc | |
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// +-------------+ |
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// 6 | argv | v
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// +-------------+ <---
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// | |
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// higher | |
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// addresses | |
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} } // namespace v8::internal
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#endif // V8_FRAMES_IA32_H_ |