Elliott Hughes | 2faa5f1 | 2012-01-30 14:42:07 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
Carl Shapiro | 9b9ba28 | 2011-08-14 15:30:39 -0700 | [diff] [blame] | 16 | |
Elliott Hughes | 7740579 | 2012-03-15 15:22:12 -0700 | [diff] [blame] | 17 | #include <stdint.h> |
Carl Shapiro | 9b9ba28 | 2011-08-14 15:30:39 -0700 | [diff] [blame] | 18 | |
| 19 | #include <algorithm> |
| 20 | |
Ian Rogers | 4a510d8 | 2011-10-09 14:30:24 -0700 | [diff] [blame] | 21 | #include "asm_support.h" |
Brian Carlstrom | 3320cf4 | 2011-10-04 14:58:28 -0700 | [diff] [blame] | 22 | #include "compiled_method.h" |
Ian Rogers | 1212a02 | 2013-03-04 10:48:41 -0800 | [diff] [blame^] | 23 | #include "compiler/driver/compiler_driver.h" |
Ian Rogers | 2fa6b2e | 2012-10-17 00:10:17 -0700 | [diff] [blame] | 24 | #include "invoke_arg_array_builder.h" |
Ian Rogers | 81d425b | 2012-09-27 16:03:43 -0700 | [diff] [blame] | 25 | #include "jni_internal.h" |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 26 | #include "mirror/abstract_method.h" |
Ian Rogers | 57b86d4 | 2012-03-27 16:05:41 -0700 | [diff] [blame] | 27 | #include "oat/utils/arm/assembler_arm.h" |
| 28 | #include "oat/utils/assembler.h" |
Carl Shapiro | 9b9ba28 | 2011-08-14 15:30:39 -0700 | [diff] [blame] | 29 | |
Carl Shapiro | 9b9ba28 | 2011-08-14 15:30:39 -0700 | [diff] [blame] | 30 | namespace art { |
Ian Rogers | 2c8f653 | 2011-09-02 17:16:34 -0700 | [diff] [blame] | 31 | namespace arm { |
Carl Shapiro | 9b9ba28 | 2011-08-14 15:30:39 -0700 | [diff] [blame] | 32 | |
| 33 | // Creates a function which invokes a managed method with an array of |
| 34 | // arguments. |
| 35 | // |
| 36 | // At the time of call, the environment looks something like this: |
| 37 | // |
| 38 | // R0 = method pointer |
| 39 | // R1 = receiver pointer or NULL for static methods |
| 40 | // R2 = (managed) thread pointer |
Ian Rogers | cdd1d2d | 2011-08-18 09:58:17 -0700 | [diff] [blame] | 41 | // R3 = argument array or NULL for no argument methods |
| 42 | // [SP] = JValue* result or NULL for void returns |
Carl Shapiro | 9b9ba28 | 2011-08-14 15:30:39 -0700 | [diff] [blame] | 43 | // |
| 44 | // As the JNI call has already transitioned the thread into the |
| 45 | // "running" state the remaining responsibilities of this routine are |
| 46 | // to save the native register value and restore the managed thread |
| 47 | // register and transfer arguments from the array into register and on |
| 48 | // the stack, if needed. On return, the thread register must be |
| 49 | // shuffled and the return value must be store into the result JValue. |
Elliott Hughes | 46f060a | 2012-03-09 17:36:50 -0800 | [diff] [blame] | 50 | CompiledInvokeStub* CreateInvokeStub(bool is_static, const char* shorty, uint32_t shorty_len) { |
| 51 | UniquePtr<ArmAssembler> assembler(down_cast<ArmAssembler*>(Assembler::Create(kArm))); |
Ian Rogers | 2c8f653 | 2011-09-02 17:16:34 -0700 | [diff] [blame] | 52 | #define __ assembler-> |
Ian Rogers | 45619fc | 2012-02-29 11:15:25 -0800 | [diff] [blame] | 53 | size_t num_arg_array_bytes = NumArgArrayBytes(shorty, shorty_len); |
Ian Rogers | b5d09b2 | 2012-03-06 22:14:17 -0800 | [diff] [blame] | 54 | // Size of frame = spill of R4,R9/LR + Method* + possible receiver + arg array size |
| 55 | // Note, space is left in the frame to flush arguments in registers back to out locations. |
buzbee | c1f4504 | 2011-09-21 16:03:19 -0700 | [diff] [blame] | 56 | size_t unpadded_frame_size = (4 * kPointerSize) + |
Ian Rogers | 0571d35 | 2011-11-03 19:51:38 -0700 | [diff] [blame] | 57 | (is_static ? 0 : kPointerSize) + |
| 58 | num_arg_array_bytes; |
Ian Rogers | cdd1d2d | 2011-08-18 09:58:17 -0700 | [diff] [blame] | 59 | size_t frame_size = RoundUp(unpadded_frame_size, kStackAlignment); |
Carl Shapiro | 9b9ba28 | 2011-08-14 15:30:39 -0700 | [diff] [blame] | 60 | |
buzbee | c1f4504 | 2011-09-21 16:03:19 -0700 | [diff] [blame] | 61 | // Spill R4,R9 and LR |
| 62 | RegList save = (1 << R9) | (1 << R4); |
Carl Shapiro | 9b9ba28 | 2011-08-14 15:30:39 -0700 | [diff] [blame] | 63 | __ PushList(save | (1 << LR)); |
| 64 | |
Carl Shapiro | 9b9ba28 | 2011-08-14 15:30:39 -0700 | [diff] [blame] | 65 | // Move the managed thread pointer into R9. |
| 66 | __ mov(R9, ShifterOperand(R2)); |
| 67 | |
Ian Rogers | ae67599 | 2011-10-09 17:10:22 -0700 | [diff] [blame] | 68 | // Reset R4 to suspend check interval |
Ian Rogers | 4a510d8 | 2011-10-09 14:30:24 -0700 | [diff] [blame] | 69 | __ LoadImmediate(R4, SUSPEND_CHECK_INTERVAL); |
| 70 | |
buzbee | c1f4504 | 2011-09-21 16:03:19 -0700 | [diff] [blame] | 71 | // Move frame down for arguments less 3 pushed values above |
| 72 | __ AddConstant(SP, -frame_size + (3 * kPointerSize)); |
Ian Rogers | cdd1d2d | 2011-08-18 09:58:17 -0700 | [diff] [blame] | 73 | |
| 74 | // Can either get 3 or 2 arguments into registers |
Ian Rogers | 0571d35 | 2011-11-03 19:51:38 -0700 | [diff] [blame] | 75 | size_t reg_bytes = (is_static ? 3 : 2) * kPointerSize; |
Brian Carlstrom | fd2ec54 | 2012-05-02 15:08:57 -0700 | [diff] [blame] | 76 | if (num_arg_array_bytes <= reg_bytes) { |
Ian Rogers | 0571d35 | 2011-11-03 19:51:38 -0700 | [diff] [blame] | 77 | reg_bytes = num_arg_array_bytes; |
Ian Rogers | cdd1d2d | 2011-08-18 09:58:17 -0700 | [diff] [blame] | 78 | } |
| 79 | |
Ian Rogers | ed8952f | 2011-08-19 17:11:22 -0700 | [diff] [blame] | 80 | // Method* at bottom of frame is null thereby terminating managed stack crawls |
| 81 | __ LoadImmediate(IP, 0, AL); |
| 82 | __ StoreToOffset(kStoreWord, IP, SP, 0); |
| 83 | |
Elliott Hughes | 7740579 | 2012-03-15 15:22:12 -0700 | [diff] [blame] | 84 | // Copy values onto the stack. |
| 85 | size_t src_offset = 0; |
| 86 | size_t dst_offset = (is_static ? 1 : 2) * kPointerSize; |
| 87 | for (size_t i = 1; i < shorty_len; ++i) { |
| 88 | switch (shorty[i]) { |
| 89 | case 'D': |
| 90 | case 'J': |
| 91 | // Move both pointers 64 bits. |
| 92 | __ LoadFromOffset(kLoadWord, IP, R3, src_offset); |
| 93 | src_offset += kPointerSize; |
| 94 | __ StoreToOffset(kStoreWord, IP, SP, dst_offset); |
| 95 | dst_offset += kPointerSize; |
Ian Rogers | cdd1d2d | 2011-08-18 09:58:17 -0700 | [diff] [blame] | 96 | |
Elliott Hughes | 7740579 | 2012-03-15 15:22:12 -0700 | [diff] [blame] | 97 | __ LoadFromOffset(kLoadWord, IP, R3, src_offset); |
| 98 | src_offset += kPointerSize; |
| 99 | __ StoreToOffset(kStoreWord, IP, SP, dst_offset); |
| 100 | dst_offset += kPointerSize; |
| 101 | break; |
| 102 | default: |
| 103 | // Move the source pointer sizeof(JValue) and the destination pointer 32 bits. |
| 104 | __ LoadFromOffset(kLoadWord, IP, R3, src_offset); |
| 105 | src_offset += sizeof(JValue); |
| 106 | __ StoreToOffset(kStoreWord, IP, SP, dst_offset); |
| 107 | dst_offset += kPointerSize; |
| 108 | break; |
| 109 | } |
Carl Shapiro | 9b9ba28 | 2011-08-14 15:30:39 -0700 | [diff] [blame] | 110 | } |
| 111 | |
| 112 | // Move all the register arguments into place. |
Elliott Hughes | 7740579 | 2012-03-15 15:22:12 -0700 | [diff] [blame] | 113 | dst_offset = (is_static ? 1 : 2) * kPointerSize; |
Ian Rogers | 0571d35 | 2011-11-03 19:51:38 -0700 | [diff] [blame] | 114 | if (is_static) { |
Elliott Hughes | 7740579 | 2012-03-15 15:22:12 -0700 | [diff] [blame] | 115 | if (reg_bytes > 0 && num_arg_array_bytes > 0) { |
| 116 | __ LoadFromOffset(kLoadWord, R1, SP, dst_offset + 0); |
| 117 | if (reg_bytes > 4 && num_arg_array_bytes > 4) { |
| 118 | __ LoadFromOffset(kLoadWord, R2, SP, dst_offset + 4); |
| 119 | if (reg_bytes > 8 && num_arg_array_bytes > 8) { |
| 120 | __ LoadFromOffset(kLoadWord, R3, SP, dst_offset + 8); |
Ian Rogers | cdd1d2d | 2011-08-18 09:58:17 -0700 | [diff] [blame] | 121 | } |
| 122 | } |
Carl Shapiro | 9b9ba28 | 2011-08-14 15:30:39 -0700 | [diff] [blame] | 123 | } |
| 124 | } else { |
Elliott Hughes | 7740579 | 2012-03-15 15:22:12 -0700 | [diff] [blame] | 125 | if (reg_bytes > 0 && num_arg_array_bytes > 0) { |
| 126 | __ LoadFromOffset(kLoadWord, R2, SP, dst_offset + 0); |
| 127 | if (reg_bytes > 4 && num_arg_array_bytes > 4) { |
| 128 | __ LoadFromOffset(kLoadWord, R3, SP, dst_offset + 4); |
Ian Rogers | cdd1d2d | 2011-08-18 09:58:17 -0700 | [diff] [blame] | 129 | } |
Carl Shapiro | 9b9ba28 | 2011-08-14 15:30:39 -0700 | [diff] [blame] | 130 | } |
| 131 | } |
| 132 | |
Carl Shapiro | 9b9ba28 | 2011-08-14 15:30:39 -0700 | [diff] [blame] | 133 | // Load the code pointer we are about to call. |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 134 | __ LoadFromOffset(kLoadWord, IP, R0, mirror::AbstractMethod::GetCodeOffset().Int32Value()); |
Carl Shapiro | 9b9ba28 | 2011-08-14 15:30:39 -0700 | [diff] [blame] | 135 | |
| 136 | // Do the call. |
| 137 | __ blx(IP); |
| 138 | |
Carl Shapiro | 9b9ba28 | 2011-08-14 15:30:39 -0700 | [diff] [blame] | 139 | // If the method returns a value, store it to the result pointer. |
Ian Rogers | 0571d35 | 2011-11-03 19:51:38 -0700 | [diff] [blame] | 140 | if (shorty[0] != 'V') { |
Ian Rogers | cdd1d2d | 2011-08-18 09:58:17 -0700 | [diff] [blame] | 141 | // Load the result JValue pointer of the stub caller's out args. |
| 142 | __ LoadFromOffset(kLoadWord, IP, SP, frame_size); |
Ian Rogers | 0571d35 | 2011-11-03 19:51:38 -0700 | [diff] [blame] | 143 | StoreOperandType type = (shorty[0] == 'J' || shorty[0] == 'D') ? kStoreWordPair : kStoreWord; |
| 144 | __ StoreToOffset(type, R0, IP, 0); |
Carl Shapiro | 9b9ba28 | 2011-08-14 15:30:39 -0700 | [diff] [blame] | 145 | } |
| 146 | |
buzbee | c1f4504 | 2011-09-21 16:03:19 -0700 | [diff] [blame] | 147 | // Remove the frame less the spilled R4, R9 and LR |
| 148 | __ AddConstant(SP, frame_size - (3 * kPointerSize)); |
Ian Rogers | cdd1d2d | 2011-08-18 09:58:17 -0700 | [diff] [blame] | 149 | |
buzbee | c1f4504 | 2011-09-21 16:03:19 -0700 | [diff] [blame] | 150 | // Pop R4, R9 and the LR into PC |
Carl Shapiro | 9b9ba28 | 2011-08-14 15:30:39 -0700 | [diff] [blame] | 151 | __ PopList(save | (1 << PC)); |
Ian Rogers | 2c8f653 | 2011-09-02 17:16:34 -0700 | [diff] [blame] | 152 | // TODO: store native_entry in the stub table |
Brian Carlstrom | 3320cf4 | 2011-10-04 14:58:28 -0700 | [diff] [blame] | 153 | std::vector<uint8_t> code(assembler->CodeSize()); |
| 154 | MemoryRegion region(&code[0], code.size()); |
Ian Rogers | 2c8f653 | 2011-09-02 17:16:34 -0700 | [diff] [blame] | 155 | assembler->FinalizeInstructions(region); |
Logan Chien | 598c513 | 2012-04-28 22:00:44 +0800 | [diff] [blame] | 156 | return new CompiledInvokeStub(kArm, code); |
Ian Rogers | 2c8f653 | 2011-09-02 17:16:34 -0700 | [diff] [blame] | 157 | #undef __ |
Carl Shapiro | 9b9ba28 | 2011-08-14 15:30:39 -0700 | [diff] [blame] | 158 | } |
| 159 | |
Ian Rogers | 2c8f653 | 2011-09-02 17:16:34 -0700 | [diff] [blame] | 160 | } // namespace arm |
Carl Shapiro | 9b9ba28 | 2011-08-14 15:30:39 -0700 | [diff] [blame] | 161 | } // namespace art |
Elliott Hughes | 46f060a | 2012-03-09 17:36:50 -0800 | [diff] [blame] | 162 | |
Ian Rogers | 1212a02 | 2013-03-04 10:48:41 -0800 | [diff] [blame^] | 163 | extern "C" art::CompiledInvokeStub* ArtCreateArmInvokeStub(art::CompilerDriver& /*compiler*/, bool is_static, |
Ian Rogers | 57b86d4 | 2012-03-27 16:05:41 -0700 | [diff] [blame] | 164 | const char* shorty, uint32_t shorty_len) { |
Elliott Hughes | 46f060a | 2012-03-09 17:36:50 -0800 | [diff] [blame] | 165 | return art::arm::CreateInvokeStub(is_static, shorty, shorty_len); |
| 166 | } |