jeffhao | 7fbee07 | 2012-08-24 17:56:54 -0700 | [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 | */ |
| 16 | |
| 17 | #include <stdint.h> |
| 18 | |
| 19 | #include <algorithm> |
| 20 | |
| 21 | #include "asm_support.h" |
| 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" |
jeffhao | 7fbee07 | 2012-08-24 17:56:54 -0700 | [diff] [blame] | 27 | #include "oat/utils/mips/assembler_mips.h" |
| 28 | #include "oat/utils/assembler.h" |
jeffhao | 7fbee07 | 2012-08-24 17:56:54 -0700 | [diff] [blame] | 29 | |
| 30 | namespace art { |
| 31 | namespace mips { |
| 32 | // Creates a function which invokes a managed method with an array of |
| 33 | // arguments. |
| 34 | // |
| 35 | // At the time of call, the environment looks something like this: |
| 36 | // |
| 37 | // A0 = method pointer |
| 38 | // A1 = receiver pointer or NULL for static methods |
| 39 | // A2 = (managed) thread pointer |
| 40 | // A3 = argument array or NULL for no argument methods |
| 41 | // [SP] = JValue* result or NULL for void returns |
| 42 | // |
| 43 | // As the JNI call has already transitioned the thread into the |
| 44 | // "running" state the remaining responsibilities of this routine are |
| 45 | // to save the native register value and restore the managed thread |
| 46 | // register and transfer arguments from the array into register and on |
| 47 | // the stack, if needed. On return, the thread register must be |
| 48 | // shuffled and the return value must be store into the result JValue. |
| 49 | CompiledInvokeStub* CreateInvokeStub(bool is_static, const char* shorty, uint32_t shorty_len) { |
| 50 | UniquePtr<MipsAssembler> assembler(down_cast<MipsAssembler*>(Assembler::Create(kMips))); |
| 51 | #define __ assembler-> |
| 52 | size_t num_arg_array_bytes = NumArgArrayBytes(shorty, shorty_len); |
| 53 | // Size of frame = spill of R4,R9/LR + Method* + possible receiver + arg array size |
| 54 | // Note, space is left in the frame to flush arguments in registers back to out locations. |
| 55 | size_t unpadded_frame_size = (4 * kPointerSize) + |
| 56 | (is_static ? 0 : kPointerSize) + |
| 57 | num_arg_array_bytes; |
| 58 | size_t frame_size = RoundUp(unpadded_frame_size, kStackAlignment); |
| 59 | |
| 60 | // Setup frame and spill S0 (rSUSPEND), S1 (rSELF), and RA |
| 61 | __ AddConstant(SP, SP, -frame_size); |
| 62 | __ StoreToOffset(kStoreWord, RA, SP, frame_size - 4); |
| 63 | __ StoreToOffset(kStoreWord, S1, SP, frame_size - 8); |
| 64 | __ StoreToOffset(kStoreWord, S0, SP, frame_size - 12); |
| 65 | |
| 66 | // Move the managed thread pointer into S1. |
| 67 | __ Move(S1, A2); |
| 68 | |
| 69 | // Reset S0 to suspend check interval |
| 70 | __ LoadImmediate(S0, SUSPEND_CHECK_INTERVAL); |
| 71 | |
| 72 | // Can either get 3 or 2 arguments into registers |
| 73 | size_t reg_bytes = (is_static ? 3 : 2) * kPointerSize; |
| 74 | if (num_arg_array_bytes <= reg_bytes) { |
| 75 | reg_bytes = num_arg_array_bytes; |
| 76 | } |
| 77 | |
jeffhao | 0703060 | 2012-09-26 14:33:14 -0700 | [diff] [blame] | 78 | // Method* at bottom of frame is null thereby terminating managed stack crawls |
| 79 | __ StoreToOffset(kStoreWord, ZERO, SP, 0); |
| 80 | |
jeffhao | 7fbee07 | 2012-08-24 17:56:54 -0700 | [diff] [blame] | 81 | // Copy values onto the stack. |
| 82 | size_t src_offset = 0; |
| 83 | size_t dst_offset = (is_static ? 1 : 2) * kPointerSize; |
| 84 | for (size_t i = 1; i < shorty_len; ++i) { |
| 85 | switch (shorty[i]) { |
| 86 | case 'D': |
| 87 | case 'J': |
| 88 | // Move both pointers 64 bits. |
| 89 | __ LoadFromOffset(kLoadWord, T9, A3, src_offset); |
| 90 | src_offset += kPointerSize; |
| 91 | __ StoreToOffset(kStoreWord, T9, SP, dst_offset); |
| 92 | dst_offset += kPointerSize; |
| 93 | |
| 94 | __ LoadFromOffset(kLoadWord, T9, A3, src_offset); |
| 95 | src_offset += kPointerSize; |
| 96 | __ StoreToOffset(kStoreWord, T9, SP, dst_offset); |
| 97 | dst_offset += kPointerSize; |
| 98 | break; |
| 99 | default: |
| 100 | // Move the source pointer sizeof(JValue) and the destination pointer 32 bits. |
| 101 | __ LoadFromOffset(kLoadWord, T9, A3, src_offset); |
| 102 | src_offset += sizeof(JValue); |
| 103 | __ StoreToOffset(kStoreWord, T9, SP, dst_offset); |
| 104 | dst_offset += kPointerSize; |
| 105 | break; |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | // Move all the register arguments into place. |
| 110 | dst_offset = (is_static ? 1 : 2) * kPointerSize; |
| 111 | if (is_static) { |
| 112 | if (reg_bytes > 0 && num_arg_array_bytes > 0) { |
| 113 | __ LoadFromOffset(kLoadWord, A1, SP, dst_offset + 0); |
| 114 | if (reg_bytes > 4 && num_arg_array_bytes > 4) { |
| 115 | __ LoadFromOffset(kLoadWord, A2, SP, dst_offset + 4); |
| 116 | if (reg_bytes > 8 && num_arg_array_bytes > 8) { |
| 117 | __ LoadFromOffset(kLoadWord, A3, SP, dst_offset + 8); |
| 118 | } |
| 119 | } |
| 120 | } |
| 121 | } else { |
| 122 | if (reg_bytes > 0 && num_arg_array_bytes > 0) { |
| 123 | __ LoadFromOffset(kLoadWord, A2, SP, dst_offset + 0); |
| 124 | if (reg_bytes > 4 && num_arg_array_bytes > 4) { |
| 125 | __ LoadFromOffset(kLoadWord, A3, SP, dst_offset + 4); |
| 126 | } |
| 127 | } |
| 128 | } |
| 129 | |
| 130 | // Load the code pointer we are about to call. |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 131 | __ LoadFromOffset(kLoadWord, T9, A0, mirror::AbstractMethod::GetCodeOffset().Int32Value()); |
jeffhao | 7fbee07 | 2012-08-24 17:56:54 -0700 | [diff] [blame] | 132 | |
| 133 | // Do the call. |
| 134 | __ Jalr(T9); |
| 135 | |
| 136 | // If the method returns a value, store it to the result pointer. |
| 137 | if (shorty[0] != 'V') { |
| 138 | // Load the result JValue pointer of the stub caller's out args. |
jeffhao | 0703060 | 2012-09-26 14:33:14 -0700 | [diff] [blame] | 139 | __ LoadFromOffset(kLoadWord, T9, SP, frame_size + 16); |
jeffhao | 7fbee07 | 2012-08-24 17:56:54 -0700 | [diff] [blame] | 140 | switch (shorty[0]) { |
| 141 | case 'D': |
| 142 | __ StoreDToOffset(D0, T9, 0); |
| 143 | break; |
| 144 | case 'F': |
| 145 | __ StoreFToOffset(F0, T9, 0); |
| 146 | break; |
| 147 | case 'J': |
| 148 | __ StoreToOffset(kStoreWord, V0, T9, 0); |
| 149 | __ StoreToOffset(kStoreWord, V1, T9, 4); |
| 150 | break; |
| 151 | default: |
| 152 | __ StoreToOffset(kStoreWord, V0, T9, 0); |
| 153 | } |
| 154 | } |
| 155 | |
| 156 | // Restore frame and spill regs |
| 157 | __ LoadFromOffset(kLoadWord, S0, SP, frame_size - 12); |
| 158 | __ LoadFromOffset(kLoadWord, S1, SP, frame_size - 8); |
| 159 | __ LoadFromOffset(kLoadWord, RA, SP, frame_size - 4); |
| 160 | __ AddConstant(SP, SP, frame_size); |
| 161 | |
| 162 | __ Jr(RA); |
| 163 | |
| 164 | // TODO: store native_entry in the stub table |
| 165 | std::vector<uint8_t> code(assembler->CodeSize()); |
| 166 | MemoryRegion region(&code[0], code.size()); |
| 167 | assembler->FinalizeInstructions(region); |
| 168 | return new CompiledInvokeStub(kMips, code); |
| 169 | #undef __ |
| 170 | } |
| 171 | } // namespace mips |
| 172 | } // namespace art |
| 173 | |
Ian Rogers | 1212a02 | 2013-03-04 10:48:41 -0800 | [diff] [blame^] | 174 | extern "C" art::CompiledInvokeStub* ArtCreateMipsInvokeStub(art::CompilerDriver& /*compiler*/, bool is_static, |
jeffhao | 7fbee07 | 2012-08-24 17:56:54 -0700 | [diff] [blame] | 175 | const char* shorty, uint32_t shorty_len) { |
| 176 | return art::mips::CreateInvokeStub(is_static, shorty, shorty_len); |
| 177 | } |