yangguo@chromium.org | 659ceec | 2012-01-26 07:37:54 +0000 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
ager@chromium.org | 5ec4892 | 2009-05-05 07:25:34 +0000 | [diff] [blame] | 28 | #ifndef V8_ARM_FRAMES_ARM_H_ |
| 29 | #define V8_ARM_FRAMES_ARM_H_ |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 30 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 31 | namespace v8 { |
| 32 | namespace internal { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 33 | |
| 34 | |
| 35 | // The ARM ABI does not specify the usage of register r9, which may be reserved |
| 36 | // as the static base or thread register on some platforms, in which case we |
| 37 | // leave it alone. Adjust the value of kR9Available accordingly: |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 38 | const int kR9Available = 1; // 1 if available to us, 0 if reserved |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 39 | |
| 40 | |
| 41 | // Register list in load/store instructions |
| 42 | // Note that the bit values must match those used in actual instruction encoding |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 43 | const int kNumRegs = 16; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 44 | |
| 45 | |
| 46 | // Caller-saved/arguments registers |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 47 | const RegList kJSCallerSaved = |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 48 | 1 << 0 | // r0 a1 |
| 49 | 1 << 1 | // r1 a2 |
| 50 | 1 << 2 | // r2 a3 |
| 51 | 1 << 3; // r3 a4 |
| 52 | |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 53 | const int kNumJSCallerSaved = 4; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 54 | |
| 55 | typedef Object* JSCallerSavedBuffer[kNumJSCallerSaved]; |
| 56 | |
| 57 | // Return the code of the n-th caller-saved register available to JavaScript |
| 58 | // e.g. JSCallerSavedReg(0) returns r0.code() == 0 |
| 59 | int JSCallerSavedCode(int n); |
| 60 | |
| 61 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 62 | // Callee-saved registers preserved when switching from C to JavaScript |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 63 | const RegList kCalleeSaved = |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 64 | 1 << 4 | // r4 v1 |
| 65 | 1 << 5 | // r5 v2 |
| 66 | 1 << 6 | // r6 v3 |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 67 | 1 << 7 | // r7 v4 (pp in JavaScript code) |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 68 | 1 << 8 | // r8 v5 (cp in JavaScript code) |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 69 | kR9Available << 9 | // r9 v6 |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 70 | 1 << 10 | // r10 v7 |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 71 | 1 << 11; // r11 v8 (fp in JavaScript code) |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 72 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 73 | // When calling into C++ (only for C++ calls that can't cause a GC). |
| 74 | // The call code will take care of lr, fp, etc. |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 75 | const RegList kCallerSaved = |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 76 | 1 << 0 | // r0 |
| 77 | 1 << 1 | // r1 |
| 78 | 1 << 2 | // r2 |
| 79 | 1 << 3 | // r3 |
| 80 | 1 << 9; // r9 |
| 81 | |
| 82 | |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 83 | const int kNumCalleeSaved = 7 + kR9Available; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 84 | |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 85 | // Double registers d8 to d15 are callee-saved. |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 86 | const int kNumDoubleCalleeSaved = 8; |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 87 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 88 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 89 | // Number of registers for which space is reserved in safepoints. Must be a |
| 90 | // multiple of 8. |
| 91 | // TODO(regis): Only 8 registers may actually be sufficient. Revisit. |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 92 | const int kNumSafepointRegisters = 16; |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 93 | |
| 94 | // Define the list of registers actually saved at safepoints. |
| 95 | // Note that the number of saved registers may be smaller than the reserved |
| 96 | // space, i.e. kNumSafepointSavedRegisters <= kNumSafepointRegisters. |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 97 | const RegList kSafepointSavedRegisters = kJSCallerSaved | kCalleeSaved; |
| 98 | const int kNumSafepointSavedRegisters = kNumJSCallerSaved + kNumCalleeSaved; |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 99 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 100 | // ---------------------------------------------------- |
| 101 | |
| 102 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 103 | class EntryFrameConstants : public AllStatic { |
| 104 | public: |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 105 | static const int kCallerFPOffset = -3 * kPointerSize; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 106 | }; |
| 107 | |
| 108 | |
| 109 | class ExitFrameConstants : public AllStatic { |
| 110 | public: |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 111 | static const int kCodeOffset = -2 * kPointerSize; |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 112 | static const int kSPOffset = -1 * kPointerSize; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 113 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 114 | // The caller fields are below the frame pointer on the stack. |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 115 | static const int kCallerFPOffset = 0 * kPointerSize; |
| 116 | // The calling JS function is below FP. |
| 117 | static const int kCallerPCOffset = 1 * kPointerSize; |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 118 | |
| 119 | // FP-relative displacement of the caller's SP. It points just |
| 120 | // below the saved PC. |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 121 | static const int kCallerSPDisplacement = 2 * kPointerSize; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 122 | }; |
| 123 | |
| 124 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 125 | class JavaScriptFrameConstants : public AllStatic { |
| 126 | public: |
| 127 | // FP-relative. |
| 128 | static const int kLocal0Offset = StandardFrameConstants::kExpressionsOffset; |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 129 | static const int kLastParameterOffset = +2 * kPointerSize; |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 130 | static const int kFunctionOffset = StandardFrameConstants::kMarkerOffset; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 131 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 132 | // Caller SP-relative. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 133 | static const int kParam0Offset = -2 * kPointerSize; |
| 134 | static const int kReceiverOffset = -1 * kPointerSize; |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 135 | }; |
| 136 | |
| 137 | |
| 138 | class ArgumentsAdaptorFrameConstants : public AllStatic { |
| 139 | public: |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 140 | // FP-relative. |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 141 | static const int kLengthOffset = StandardFrameConstants::kExpressionsOffset; |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 142 | |
yangguo@chromium.org | 659ceec | 2012-01-26 07:37:54 +0000 | [diff] [blame] | 143 | static const int kFrameSize = |
| 144 | StandardFrameConstants::kFixedFrameSize + kPointerSize; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 145 | }; |
| 146 | |
| 147 | |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 148 | class ConstructFrameConstants : public AllStatic { |
| 149 | public: |
| 150 | // FP-relative. |
| 151 | static const int kImplicitReceiverOffset = -6 * kPointerSize; |
| 152 | static const int kConstructorOffset = -5 * kPointerSize; |
| 153 | static const int kLengthOffset = -4 * kPointerSize; |
| 154 | static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset; |
| 155 | |
| 156 | static const int kFrameSize = |
| 157 | StandardFrameConstants::kFixedFrameSize + 4 * kPointerSize; |
| 158 | }; |
| 159 | |
| 160 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 161 | class InternalFrameConstants : public AllStatic { |
| 162 | public: |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 163 | // FP-relative. |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 164 | static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 165 | }; |
| 166 | |
| 167 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 168 | inline Object* JavaScriptFrame::function_slot_object() const { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 169 | const int offset = JavaScriptFrameConstants::kFunctionOffset; |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 170 | return Memory::Object_at(fp() + offset); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 171 | } |
| 172 | |
| 173 | |
danno@chromium.org | d3c4210 | 2013-08-01 16:58:23 +0000 | [diff] [blame] | 174 | inline void StackHandler::SetFp(Address slot, Address fp) { |
| 175 | Memory::Address_at(slot) = fp; |
| 176 | } |
| 177 | |
| 178 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 179 | } } // namespace v8::internal |
| 180 | |
ager@chromium.org | 5ec4892 | 2009-05-05 07:25:34 +0000 | [diff] [blame] | 181 | #endif // V8_ARM_FRAMES_ARM_H_ |