Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #ifndef V8_X87_FRAMES_X87_H_ |
| 6 | #define V8_X87_FRAMES_X87_H_ |
| 7 | |
| 8 | namespace v8 { |
| 9 | namespace internal { |
| 10 | |
| 11 | |
| 12 | // Register lists |
| 13 | // Note that the bit values must match those used in actual instruction encoding |
| 14 | const int kNumRegs = 8; |
| 15 | |
| 16 | |
| 17 | // Caller-saved registers |
| 18 | const RegList kJSCallerSaved = |
| 19 | 1 << 0 | // eax |
| 20 | 1 << 1 | // ecx |
| 21 | 1 << 2 | // edx |
| 22 | 1 << 3 | // ebx - used as a caller-saved register in JavaScript code |
| 23 | 1 << 7; // edi - callee function |
| 24 | |
| 25 | const int kNumJSCallerSaved = 5; |
| 26 | |
| 27 | |
| 28 | // Number of registers for which space is reserved in safepoints. |
| 29 | const int kNumSafepointRegisters = 8; |
| 30 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 31 | // ---------------------------------------------------- |
| 32 | |
| 33 | |
| 34 | class EntryFrameConstants : public AllStatic { |
| 35 | public: |
| 36 | static const int kCallerFPOffset = -6 * kPointerSize; |
| 37 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 38 | static const int kNewTargetArgOffset = +2 * kPointerSize; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 39 | static const int kFunctionArgOffset = +3 * kPointerSize; |
| 40 | static const int kReceiverArgOffset = +4 * kPointerSize; |
| 41 | static const int kArgcOffset = +5 * kPointerSize; |
| 42 | static const int kArgvOffset = +6 * kPointerSize; |
| 43 | }; |
| 44 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 45 | class ExitFrameConstants : public TypedFrameConstants { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 46 | public: |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 47 | static const int kSPOffset = TYPED_FRAME_PUSHED_VALUE_OFFSET(0); |
| 48 | static const int kCodeOffset = TYPED_FRAME_PUSHED_VALUE_OFFSET(1); |
| 49 | DEFINE_TYPED_FRAME_SIZES(2); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 50 | |
| 51 | static const int kCallerFPOffset = 0 * kPointerSize; |
| 52 | static const int kCallerPCOffset = +1 * kPointerSize; |
| 53 | |
| 54 | // FP-relative displacement of the caller's SP. It points just |
| 55 | // below the saved PC. |
| 56 | static const int kCallerSPDisplacement = +2 * kPointerSize; |
| 57 | |
| 58 | static const int kConstantPoolOffset = 0; // Not used |
| 59 | }; |
| 60 | |
| 61 | |
| 62 | class JavaScriptFrameConstants : public AllStatic { |
| 63 | public: |
| 64 | // FP-relative. |
| 65 | static const int kLocal0Offset = StandardFrameConstants::kExpressionsOffset; |
| 66 | static const int kLastParameterOffset = +2 * kPointerSize; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 67 | static const int kFunctionOffset = StandardFrameConstants::kFunctionOffset; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 68 | |
| 69 | // Caller SP-relative. |
| 70 | static const int kParam0Offset = -2 * kPointerSize; |
| 71 | static const int kReceiverOffset = -1 * kPointerSize; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 72 | }; |
| 73 | |
| 74 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 75 | } // namespace internal |
| 76 | } // namespace v8 |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 77 | |
| 78 | #endif // V8_X87_FRAMES_X87_H_ |