| // Copyright 2006-2008 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * 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. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "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 THE COPYRIGHT |
| // OWNER 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 V8_FRAMES_IA32_H_ |
| #define V8_FRAMES_IA32_H_ |
| |
| namespace v8 { namespace internal { |
| |
| |
| // Register lists |
| // Note that the bit values must match those used in actual instruction encoding |
| static const int kNumRegs = 8; |
| |
| |
| // Caller-saved registers |
| static const RegList kJSCallerSaved = |
| 1 << 0 | // eax |
| 1 << 1 | // ecx |
| 1 << 2 | // edx |
| 1 << 3 | // ebx - used as a caller-saved register in JavaScript code |
| 1 << 7; // edi - callee function |
| |
| static const int kNumJSCallerSaved = 5; |
| |
| typedef Object* JSCallerSavedBuffer[kNumJSCallerSaved]; |
| |
| // ---------------------------------------------------- |
| |
| |
| class StackHandlerConstants : public AllStatic { |
| public: |
| static const int kNextOffset = 0 * kPointerSize; |
| static const int kPPOffset = 1 * kPointerSize; |
| static const int kFPOffset = 2 * kPointerSize; |
| |
| // TODO(1233780): Get rid of the code slot in stack handlers. |
| static const int kCodeOffset = 3 * kPointerSize; |
| |
| static const int kStateOffset = 4 * kPointerSize; |
| static const int kPCOffset = 5 * kPointerSize; |
| |
| static const int kAddressDisplacement = -1 * kPointerSize; |
| static const int kSize = kPCOffset + kPointerSize; |
| }; |
| |
| |
| class EntryFrameConstants : public AllStatic { |
| public: |
| static const int kCallerFPOffset = -6 * kPointerSize; |
| |
| static const int kFunctionArgOffset = +3 * kPointerSize; |
| static const int kReceiverArgOffset = +4 * kPointerSize; |
| static const int kArgcOffset = +5 * kPointerSize; |
| static const int kArgvOffset = +6 * kPointerSize; |
| }; |
| |
| |
| class ExitFrameConstants : public AllStatic { |
| public: |
| static const int kDebugMarkOffset = -2 * kPointerSize; |
| static const int kSPOffset = -1 * kPointerSize; |
| |
| // Let the parameters pointer for exit frames point just below the |
| // frame structure on the stack (frame pointer and return address). |
| static const int kPPDisplacement = +2 * kPointerSize; |
| |
| static const int kCallerFPOffset = 0 * kPointerSize; |
| static const int kCallerPCOffset = +1 * kPointerSize; |
| }; |
| |
| |
| class StandardFrameConstants : public AllStatic { |
| public: |
| static const int kExpressionsOffset = -3 * kPointerSize; |
| static const int kMarkerOffset = -2 * kPointerSize; |
| static const int kContextOffset = -1 * kPointerSize; |
| static const int kCallerFPOffset = 0 * kPointerSize; |
| static const int kCallerPCOffset = +1 * kPointerSize; |
| static const int kCallerSPOffset = +2 * kPointerSize; |
| }; |
| |
| |
| class JavaScriptFrameConstants : public AllStatic { |
| public: |
| // FP-relative. |
| static const int kLocal0Offset = StandardFrameConstants::kExpressionsOffset; |
| static const int kSavedRegistersOffset = +2 * kPointerSize; |
| static const int kFunctionOffset = StandardFrameConstants::kMarkerOffset; |
| |
| // CallerSP-relative (aka PP-relative) |
| static const int kParam0Offset = -2 * kPointerSize; |
| static const int kReceiverOffset = -1 * kPointerSize; |
| }; |
| |
| |
| class ArgumentsAdaptorFrameConstants : public AllStatic { |
| public: |
| static const int kLengthOffset = StandardFrameConstants::kExpressionsOffset; |
| }; |
| |
| |
| class InternalFrameConstants : public AllStatic { |
| public: |
| static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset; |
| }; |
| |
| |
| inline Object* JavaScriptFrame::function_slot_object() const { |
| const int offset = JavaScriptFrameConstants::kFunctionOffset; |
| return Memory::Object_at(fp() + offset); |
| } |
| |
| |
| // ---------------------------------------------------- |
| |
| |
| |
| |
| // C Entry frames: |
| |
| // lower | Stack | |
| // addresses | ^ | |
| // | | | |
| // | | |
| // +-------------+ |
| // | entry_pc | |
| // +-------------+ <--+ entry_sp |
| // . | |
| // . | |
| // . | |
| // +-------------+ | |
| // -3 | entry_sp --+----+ |
| // e +-------------+ |
| // n -2 | C function | |
| // t +-------------+ |
| // r -1 | caller_pp | |
| // y +-------------+ <--- fp (frame pointer, ebp) |
| // 0 | caller_fp | |
| // f +-------------+ |
| // r 1 | caller_pc | |
| // a +-------------+ <--- caller_sp (stack pointer, esp) |
| // m 2 | | |
| // e | arguments | |
| // | | |
| // +- - - - - - -+ |
| // | argument0 | |
| // +=============+ |
| // | | |
| // | caller | |
| // higher | expressions | |
| // addresses | | |
| |
| |
| // Proper JS frames: |
| |
| // lower | Stack | |
| // addresses | ^ | |
| // | | | |
| // | | |
| // ----------- +=============+ <--- sp (stack pointer, esp) |
| // | function | |
| // +-------------+ |
| // | | |
| // | expressions | |
| // | | |
| // +-------------+ |
| // a | | |
| // c | locals | |
| // t | | |
| // i +- - - - - - -+ <--- |
| // v -4 | local0 | ^ |
| // a +-------------+ | |
| // t -3 | code | | |
| // i +-------------+ | |
| // o -2 | context | | kLocal0Offset |
| // n +-------------+ | |
| // -1 | caller_pp | v |
| // f +-------------+ <--- fp (frame pointer, ebp) |
| // r 0 | caller_fp | |
| // a +-------------+ |
| // m 1 | caller_pc | |
| // e +-------------+ <--- caller_sp (incl. parameters) |
| // 2 | | |
| // | parameters | |
| // | | |
| // +- - - - - - -+ <--- |
| // -2 | parameter0 | ^ |
| // +-------------+ | kParam0Offset |
| // -1 | receiver | v |
| // ----------- +=============+ <--- pp (parameter pointer, edi) |
| // 0 | function | |
| // +-------------+ |
| // | | |
| // | caller | |
| // higher | expressions | |
| // addresses | | |
| |
| |
| // JS entry frames: When calling from C to JS, we construct two extra |
| // frames: An entry frame (C) and a trampoline frame (JS). The |
| // following pictures shows the two frames: |
| |
| // lower | Stack | |
| // addresses | ^ | |
| // | | | |
| // | | |
| // ----------- +=============+ <--- sp (stack pointer, esp) |
| // | | |
| // | parameters | |
| // t | | |
| // r +- - - - - - -+ |
| // a | parameter0 | |
| // m +-------------+ |
| // p | receiver | |
| // o +-------------+ <--- |
| // l | function | ^ |
| // i +-------------+ | |
| // n -3 | code | | kLocal0Offset |
| // e +-------------+ |
| // -2 | NULL | context is always NULL |
| // +-------------+ |
| // f -1 | NULL | caller pp is always NULL for entry frames |
| // r +-------------+ <--- fp (frame pointer, ebp) |
| // a 0 | caller fp | |
| // m +-------------+ |
| // e 1 | caller pc | |
| // +-------------+ <--- caller_sp (incl. parameters) |
| // | 0 | |
| // ----------- +=============+ <--- pp (parameter pointer, edi) |
| // | 0 | |
| // +-------------+ <--- |
| // . ^ |
| // . | try-handler (HandlerOffsets::kSize) |
| // . v |
| // +-------------+ <--- |
| // -5 | next top pp | |
| // +-------------+ |
| // e -4 | next top fp | |
| // n +-------------+ <--- |
| // t -3 | ebx | ^ |
| // r +-------------+ | |
| // y -2 | esi | | callee-saved registers |
| // +-------------+ | |
| // -1 | edi | v |
| // f +-------------+ <--- fp |
| // r 0 | caller fp | |
| // a +-------------+ pp == NULL (parameter pointer) |
| // m 1 | caller pc | |
| // e +-------------+ <--- caller sp |
| // 2 | code entry | ^ |
| // +-------------+ | |
| // 3 | function | | |
| // +-------------+ | arguments passed from C code |
| // 4 | receiver | | |
| // +-------------+ | |
| // 5 | argc | | |
| // +-------------+ | |
| // 6 | argv | v |
| // +-------------+ <--- |
| // | | |
| // higher | | |
| // addresses | | |
| |
| |
| } } // namespace v8::internal |
| |
| #endif // V8_FRAMES_IA32_H_ |