diff options
Diffstat (limited to 'V8Binding/v8/src/ia32/frames-ia32.h')
| -rw-r--r-- | V8Binding/v8/src/ia32/frames-ia32.h | 173 |
1 files changed, 8 insertions, 165 deletions
diff --git a/V8Binding/v8/src/ia32/frames-ia32.h b/V8Binding/v8/src/ia32/frames-ia32.h index aec1f48..3a7c86b 100644 --- a/V8Binding/v8/src/ia32/frames-ia32.h +++ b/V8Binding/v8/src/ia32/frames-ia32.h @@ -55,16 +55,10 @@ 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; + static const int kFPOffset = 1 * kPointerSize; + static const int kStateOffset = 2 * kPointerSize; + static const int kPCOffset = 3 * 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; }; @@ -85,12 +79,12 @@ class ExitFrameConstants : public AllStatic { 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; + + // FP-relative displacement of the caller's SP. It points just + // below the saved PC. + static const int kCallerSPDisplacement = +2 * kPointerSize; }; @@ -112,7 +106,7 @@ class JavaScriptFrameConstants : public AllStatic { static const int kSavedRegistersOffset = +2 * kPointerSize; static const int kFunctionOffset = StandardFrameConstants::kMarkerOffset; - // CallerSP-relative (aka PP-relative) + // Caller SP-relative. static const int kParam0Offset = -2 * kPointerSize; static const int kReceiverOffset = -1 * kPointerSize; }; @@ -136,157 +130,6 @@ inline Object* JavaScriptFrame::function_slot_object() const { } -// ---------------------------------------------------- - - - - - // 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_IA32_FRAMES_IA32_H_ |