ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 1 | // Copyright 2006-2008 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 | |
| 28 | #include "v8.h" |
| 29 | |
| 30 | #include "codegen-inl.h" |
| 31 | #include "debug.h" |
| 32 | #include "runtime.h" |
| 33 | |
| 34 | namespace v8 { namespace internal { |
| 35 | |
| 36 | |
| 37 | #define __ masm-> |
| 38 | |
| 39 | |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 40 | void Builtins::Generate_Adaptor(MacroAssembler* masm, CFunctionId id) { |
| 41 | // TODO(1238487): Don't pass the function in a static variable. |
| 42 | ExternalReference passed = ExternalReference::builtin_passed_function(); |
| 43 | __ mov(Operand::StaticVariable(passed), edi); |
| 44 | |
| 45 | // The actual argument count has already been loaded into register |
| 46 | // eax, but JumpToBuiltin expects eax to contain the number of |
| 47 | // arguments including the receiver. |
| 48 | __ inc(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 49 | __ JumpToBuiltin(ExternalReference(id)); |
| 50 | } |
| 51 | |
| 52 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 53 | void Builtins::Generate_JSConstructCall(MacroAssembler* masm) { |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 54 | // ----------- S t a t e ------------- |
| 55 | // -- eax: number of arguments |
| 56 | // -- edi: constructor function |
| 57 | // ----------------------------------- |
| 58 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 59 | // Enter a construct frame. |
| 60 | __ EnterConstructFrame(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 61 | |
| 62 | // Store a smi-tagged arguments count on the stack. |
| 63 | __ shl(eax, kSmiTagSize); |
| 64 | __ push(eax); |
| 65 | |
| 66 | // Push the function to invoke on the stack. |
| 67 | __ push(edi); |
| 68 | |
| 69 | // Try to allocate the object without transitioning into C code. If any of the |
| 70 | // preconditions is not met, the code bails out to the runtime call. |
| 71 | Label rt_call, allocated; |
| 72 | if (FLAG_inline_new) { |
| 73 | Label undo_allocation; |
| 74 | ExternalReference debug_step_in_fp = |
| 75 | ExternalReference::debug_step_in_fp_address(); |
| 76 | __ cmp(Operand::StaticVariable(debug_step_in_fp), Immediate(0)); |
| 77 | __ j(not_equal, &rt_call); |
| 78 | // Check that function is not a Smi. |
| 79 | __ test(edi, Immediate(kSmiTagMask)); |
| 80 | __ j(zero, &rt_call); |
| 81 | // Check that function is a JSFunction |
| 82 | __ mov(eax, FieldOperand(edi, JSFunction::kMapOffset)); |
| 83 | __ movzx_b(eax, FieldOperand(eax, Map::kInstanceTypeOffset)); |
| 84 | __ cmp(eax, JS_FUNCTION_TYPE); |
| 85 | __ j(not_equal, &rt_call); |
| 86 | |
| 87 | // Verified that the constructor is a JSFunction. |
| 88 | // Load the initial map and verify that it is in fact a map. |
| 89 | // edi: constructor |
| 90 | __ mov(eax, FieldOperand(edi, JSFunction::kPrototypeOrInitialMapOffset)); |
| 91 | // Will both indicate a NULL and a Smi |
| 92 | __ test(eax, Immediate(kSmiTagMask)); |
| 93 | __ j(zero, &rt_call); |
| 94 | // edi: constructor |
| 95 | // eax: initial map (if proven valid below) |
| 96 | __ mov(ebx, FieldOperand(eax, JSFunction::kMapOffset)); |
| 97 | __ movzx_b(ebx, FieldOperand(ebx, Map::kInstanceTypeOffset)); |
| 98 | __ cmp(ebx, MAP_TYPE); |
| 99 | __ j(not_equal, &rt_call); |
| 100 | |
| 101 | // Check that the constructor is not constructing a JSFunction (see comments |
| 102 | // in Runtime_NewObject in runtime.cc). In which case the initial map's |
| 103 | // instance type would be JS_FUNCTION_TYPE. |
| 104 | // edi: constructor |
| 105 | // eax: initial map |
| 106 | __ movzx_b(ebx, FieldOperand(eax, Map::kInstanceTypeOffset)); |
| 107 | __ cmp(ebx, JS_FUNCTION_TYPE); |
| 108 | __ j(equal, &rt_call); |
| 109 | |
| 110 | // Now allocate the JSObject on the heap. |
| 111 | // edi: constructor |
| 112 | // eax: initial map |
| 113 | __ movzx_b(edi, FieldOperand(eax, Map::kInstanceSizeOffset)); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 114 | __ shl(edi, kPointerSizeLog2); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 115 | // Make sure that the maximum heap object size will never cause us |
| 116 | // problem here, because it is always greater than the maximum |
| 117 | // instance size that can be represented in a byte. |
| 118 | ASSERT(Heap::MaxHeapObjectSize() >= (1 << kBitsPerByte)); |
| 119 | ExternalReference new_space_allocation_top = |
| 120 | ExternalReference::new_space_allocation_top_address(); |
| 121 | __ mov(ebx, Operand::StaticVariable(new_space_allocation_top)); |
| 122 | __ add(edi, Operand(ebx)); // Calculate new top |
| 123 | ExternalReference new_space_allocation_limit = |
| 124 | ExternalReference::new_space_allocation_limit_address(); |
| 125 | __ cmp(edi, Operand::StaticVariable(new_space_allocation_limit)); |
| 126 | __ j(greater_equal, &rt_call); |
| 127 | // Allocated the JSObject, now initialize the fields. |
| 128 | // eax: initial map |
| 129 | // ebx: JSObject |
| 130 | // edi: start of next object |
| 131 | __ mov(Operand(ebx, JSObject::kMapOffset), eax); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 132 | __ mov(ecx, Factory::empty_fixed_array()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 133 | __ mov(Operand(ebx, JSObject::kPropertiesOffset), ecx); |
| 134 | __ mov(Operand(ebx, JSObject::kElementsOffset), ecx); |
| 135 | // Set extra fields in the newly allocated object. |
| 136 | // eax: initial map |
| 137 | // ebx: JSObject |
| 138 | // edi: start of next object |
| 139 | { Label loop, entry; |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 140 | __ mov(edx, Factory::undefined_value()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 141 | __ lea(ecx, Operand(ebx, JSObject::kHeaderSize)); |
| 142 | __ jmp(&entry); |
| 143 | __ bind(&loop); |
| 144 | __ mov(Operand(ecx, 0), edx); |
| 145 | __ add(Operand(ecx), Immediate(kPointerSize)); |
| 146 | __ bind(&entry); |
| 147 | __ cmp(ecx, Operand(edi)); |
| 148 | __ j(less, &loop); |
| 149 | } |
| 150 | |
| 151 | // Mostly done with the JSObject. Add the heap tag and store the new top, so |
| 152 | // that we can continue and jump into the continuation code at any time from |
| 153 | // now on. Any failures need to undo the setting of the new top, so that the |
| 154 | // heap is in a consistent state and verifiable. |
| 155 | // eax: initial map |
| 156 | // ebx: JSObject |
| 157 | // edi: start of next object |
| 158 | __ or_(Operand(ebx), Immediate(kHeapObjectTag)); |
| 159 | __ mov(Operand::StaticVariable(new_space_allocation_top), edi); |
| 160 | |
| 161 | // Check if a properties array should be setup and allocate one if needed. |
| 162 | // Otherwise initialize the properties to the empty_fixed_array as well. |
| 163 | // eax: initial map |
| 164 | // ebx: JSObject |
| 165 | // edi: start of next object |
| 166 | __ movzx_b(edx, FieldOperand(eax, Map::kUnusedPropertyFieldsOffset)); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 167 | __ movzx_b(ecx, FieldOperand(eax, Map::kInObjectPropertiesOffset)); |
| 168 | // Calculate unused properties past the end of the in-object properties. |
| 169 | __ sub(edx, Operand(ecx)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 170 | __ test(edx, Operand(edx)); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 171 | // Done if no extra properties are to be allocated. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 172 | __ j(zero, &allocated); |
| 173 | |
| 174 | // Scale the number of elements by pointer size and add the header for |
| 175 | // FixedArrays to the start of the next object calculation from above. |
| 176 | // eax: initial map |
| 177 | // ebx: JSObject |
| 178 | // edi: start of next object (will be start of FixedArray) |
| 179 | // edx: number of elements in properties array |
| 180 | ASSERT(Heap::MaxHeapObjectSize() > |
| 181 | (FixedArray::kHeaderSize + 255*kPointerSize)); |
| 182 | __ lea(ecx, Operand(edi, edx, times_4, FixedArray::kHeaderSize)); |
| 183 | __ cmp(ecx, Operand::StaticVariable(new_space_allocation_limit)); |
| 184 | __ j(greater_equal, &undo_allocation); |
| 185 | __ mov(Operand::StaticVariable(new_space_allocation_top), ecx); |
| 186 | |
| 187 | // Initialize the FixedArray. |
| 188 | // ebx: JSObject |
| 189 | // edi: FixedArray |
| 190 | // edx: number of elements |
| 191 | // ecx: start of next object |
| 192 | __ mov(eax, Factory::fixed_array_map()); |
| 193 | __ mov(Operand(edi, JSObject::kMapOffset), eax); // setup the map |
| 194 | __ mov(Operand(edi, Array::kLengthOffset), edx); // and length |
| 195 | |
| 196 | // Initialize the fields to undefined. |
| 197 | // ebx: JSObject |
| 198 | // edi: FixedArray |
| 199 | // ecx: start of next object |
| 200 | { Label loop, entry; |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 201 | __ mov(edx, Factory::undefined_value()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 202 | __ lea(eax, Operand(edi, FixedArray::kHeaderSize)); |
| 203 | __ jmp(&entry); |
| 204 | __ bind(&loop); |
| 205 | __ mov(Operand(eax, 0), edx); |
| 206 | __ add(Operand(eax), Immediate(kPointerSize)); |
| 207 | __ bind(&entry); |
| 208 | __ cmp(eax, Operand(ecx)); |
| 209 | __ j(less, &loop); |
| 210 | } |
| 211 | |
| 212 | // Store the initialized FixedArray into the properties field of |
| 213 | // the JSObject |
| 214 | // ebx: JSObject |
| 215 | // edi: FixedArray |
| 216 | __ or_(Operand(edi), Immediate(kHeapObjectTag)); // add the heap tag |
| 217 | __ mov(FieldOperand(ebx, JSObject::kPropertiesOffset), edi); |
| 218 | |
| 219 | |
| 220 | // Continue with JSObject being successfully allocated |
| 221 | // ebx: JSObject |
| 222 | __ jmp(&allocated); |
| 223 | |
| 224 | // Undo the setting of the new top so that the heap is verifiable. For |
| 225 | // example, the map's unused properties potentially do not match the |
| 226 | // allocated objects unused properties. |
| 227 | // ebx: JSObject (previous new top) |
| 228 | __ bind(&undo_allocation); |
| 229 | __ xor_(Operand(ebx), Immediate(kHeapObjectTag)); // clear the heap tag |
| 230 | __ mov(Operand::StaticVariable(new_space_allocation_top), ebx); |
| 231 | } |
| 232 | |
| 233 | // Allocate the new receiver object using the runtime call. |
| 234 | // edi: function (constructor) |
| 235 | __ bind(&rt_call); |
| 236 | // Must restore edi (constructor) before calling runtime. |
| 237 | __ mov(edi, Operand(esp, 0)); |
| 238 | __ push(edi); |
| 239 | __ CallRuntime(Runtime::kNewObject, 1); |
| 240 | __ mov(ebx, Operand(eax)); // store result in ebx |
| 241 | |
| 242 | // New object allocated. |
| 243 | // ebx: newly allocated object |
| 244 | __ bind(&allocated); |
| 245 | // Retrieve the function from the stack. |
| 246 | __ pop(edi); |
| 247 | |
| 248 | // Retrieve smi-tagged arguments count from the stack. |
| 249 | __ mov(eax, Operand(esp, 0)); |
| 250 | __ shr(eax, kSmiTagSize); |
| 251 | |
| 252 | // Push the allocated receiver to the stack. We need two copies |
| 253 | // because we may have to return the original one and the calling |
| 254 | // conventions dictate that the called function pops the receiver. |
| 255 | __ push(ebx); |
| 256 | __ push(ebx); |
| 257 | |
| 258 | // Setup pointer to last argument. |
| 259 | __ lea(ebx, Operand(ebp, StandardFrameConstants::kCallerSPOffset)); |
| 260 | |
| 261 | // Copy arguments and receiver to the expression stack. |
| 262 | Label loop, entry; |
| 263 | __ mov(ecx, Operand(eax)); |
| 264 | __ jmp(&entry); |
| 265 | __ bind(&loop); |
| 266 | __ push(Operand(ebx, ecx, times_4, 0)); |
| 267 | __ bind(&entry); |
| 268 | __ dec(ecx); |
| 269 | __ j(greater_equal, &loop); |
| 270 | |
| 271 | // Call the function. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 272 | ParameterCount actual(eax); |
| 273 | __ InvokeFunction(edi, actual, CALL_FUNCTION); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 274 | |
| 275 | // Restore context from the frame. |
| 276 | __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| 277 | |
| 278 | // If the result is an object (in the ECMA sense), we should get rid |
| 279 | // of the receiver and use the result; see ECMA-262 section 13.2.2-7 |
| 280 | // on page 74. |
| 281 | Label use_receiver, exit; |
| 282 | |
| 283 | // If the result is a smi, it is *not* an object in the ECMA sense. |
| 284 | __ test(eax, Immediate(kSmiTagMask)); |
| 285 | __ j(zero, &use_receiver, not_taken); |
| 286 | |
| 287 | // If the type of the result (stored in its map) is less than |
ager@chromium.org | c27e4e7 | 2008-09-04 13:52:27 +0000 | [diff] [blame] | 288 | // FIRST_JS_OBJECT_TYPE, it is not an object in the ECMA sense. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 289 | __ mov(ecx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 290 | __ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset)); |
ager@chromium.org | c27e4e7 | 2008-09-04 13:52:27 +0000 | [diff] [blame] | 291 | __ cmp(ecx, FIRST_JS_OBJECT_TYPE); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 292 | __ j(greater_equal, &exit, not_taken); |
| 293 | |
| 294 | // Throw away the result of the constructor invocation and use the |
| 295 | // on-stack receiver as the result. |
| 296 | __ bind(&use_receiver); |
| 297 | __ mov(eax, Operand(esp, 0)); |
| 298 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 299 | // Restore the arguments count and leave the construct frame. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 300 | __ bind(&exit); |
| 301 | __ mov(ebx, Operand(esp, kPointerSize)); // get arguments count |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 302 | __ LeaveConstructFrame(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 303 | |
| 304 | // Remove caller arguments from the stack and return. |
| 305 | ASSERT(kSmiTagSize == 1 && kSmiTag == 0); |
| 306 | __ pop(ecx); |
| 307 | __ lea(esp, Operand(esp, ebx, times_2, 1 * kPointerSize)); // 1 ~ receiver |
| 308 | __ push(ecx); |
| 309 | __ ret(0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 310 | } |
| 311 | |
| 312 | |
| 313 | static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm, |
| 314 | bool is_construct) { |
| 315 | // Clear the context before we push it when entering the JS frame. |
| 316 | __ xor_(esi, Operand(esi)); // clear esi |
| 317 | |
| 318 | // Enter an internal frame. |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 319 | __ EnterInternalFrame(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 320 | |
| 321 | // Load the previous frame pointer (ebx) to access C arguments |
| 322 | __ mov(ebx, Operand(ebp, 0)); |
| 323 | |
| 324 | // Get the function from the frame and setup the context. |
| 325 | __ mov(ecx, Operand(ebx, EntryFrameConstants::kFunctionArgOffset)); |
| 326 | __ mov(esi, FieldOperand(ecx, JSFunction::kContextOffset)); |
| 327 | |
| 328 | // Push the function and the receiver onto the stack. |
| 329 | __ push(ecx); |
| 330 | __ push(Operand(ebx, EntryFrameConstants::kReceiverArgOffset)); |
| 331 | |
| 332 | // Load the number of arguments and setup pointer to the arguments. |
| 333 | __ mov(eax, Operand(ebx, EntryFrameConstants::kArgcOffset)); |
| 334 | __ mov(ebx, Operand(ebx, EntryFrameConstants::kArgvOffset)); |
| 335 | |
| 336 | // Copy arguments to the stack in a loop. |
| 337 | Label loop, entry; |
| 338 | __ xor_(ecx, Operand(ecx)); // clear ecx |
| 339 | __ jmp(&entry); |
| 340 | __ bind(&loop); |
| 341 | __ mov(edx, Operand(ebx, ecx, times_4, 0)); // push parameter from argv |
| 342 | __ push(Operand(edx, 0)); // dereference handle |
| 343 | __ inc(Operand(ecx)); |
| 344 | __ bind(&entry); |
| 345 | __ cmp(ecx, Operand(eax)); |
| 346 | __ j(not_equal, &loop); |
| 347 | |
| 348 | // Get the function from the stack and call it. |
| 349 | __ mov(edi, Operand(esp, eax, times_4, +1 * kPointerSize)); // +1 ~ receiver |
| 350 | |
| 351 | // Invoke the code. |
| 352 | if (is_construct) { |
| 353 | __ call(Handle<Code>(Builtins::builtin(Builtins::JSConstructCall)), |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 354 | RelocInfo::CODE_TARGET); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 355 | } else { |
| 356 | ParameterCount actual(eax); |
| 357 | __ InvokeFunction(edi, actual, CALL_FUNCTION); |
| 358 | } |
| 359 | |
| 360 | // Exit the JS frame. Notice that this also removes the empty |
| 361 | // context and the function left on the stack by the code |
| 362 | // invocation. |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 363 | __ LeaveInternalFrame(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 364 | __ ret(1 * kPointerSize); // remove receiver |
| 365 | } |
| 366 | |
| 367 | |
| 368 | void Builtins::Generate_JSEntryTrampoline(MacroAssembler* masm) { |
| 369 | Generate_JSEntryTrampolineHelper(masm, false); |
| 370 | } |
| 371 | |
| 372 | |
| 373 | void Builtins::Generate_JSConstructEntryTrampoline(MacroAssembler* masm) { |
| 374 | Generate_JSEntryTrampolineHelper(masm, true); |
| 375 | } |
| 376 | |
| 377 | |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 378 | void Builtins::Generate_FunctionCall(MacroAssembler* masm) { |
| 379 | // 1. Make sure we have at least one argument. |
| 380 | { Label done; |
| 381 | __ test(eax, Operand(eax)); |
| 382 | __ j(not_zero, &done, taken); |
| 383 | __ pop(ebx); |
| 384 | __ push(Immediate(Factory::undefined_value())); |
| 385 | __ push(ebx); |
| 386 | __ inc(eax); |
| 387 | __ bind(&done); |
| 388 | } |
| 389 | |
| 390 | // 2. Get the function to call from the stack. |
| 391 | { Label done, non_function, function; |
| 392 | // +1 ~ return address. |
| 393 | __ mov(edi, Operand(esp, eax, times_4, +1 * kPointerSize)); |
| 394 | __ test(edi, Immediate(kSmiTagMask)); |
| 395 | __ j(zero, &non_function, not_taken); |
| 396 | __ mov(ecx, FieldOperand(edi, HeapObject::kMapOffset)); // get the map |
| 397 | __ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset)); |
| 398 | __ cmp(ecx, JS_FUNCTION_TYPE); |
| 399 | __ j(equal, &function, taken); |
| 400 | |
| 401 | // Non-function called: Clear the function to force exception. |
| 402 | __ bind(&non_function); |
| 403 | __ xor_(edi, Operand(edi)); |
| 404 | __ jmp(&done); |
| 405 | |
| 406 | // Function called: Change context eagerly to get the right global object. |
| 407 | __ bind(&function); |
| 408 | __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset)); |
| 409 | |
| 410 | __ bind(&done); |
| 411 | } |
| 412 | |
| 413 | // 3. Make sure first argument is an object; convert if necessary. |
| 414 | { Label call_to_object, use_global_receiver, patch_receiver, done; |
| 415 | __ mov(ebx, Operand(esp, eax, times_4, 0)); |
| 416 | |
| 417 | __ test(ebx, Immediate(kSmiTagMask)); |
| 418 | __ j(zero, &call_to_object); |
| 419 | |
| 420 | __ cmp(ebx, Factory::null_value()); |
| 421 | __ j(equal, &use_global_receiver); |
| 422 | __ cmp(ebx, Factory::undefined_value()); |
| 423 | __ j(equal, &use_global_receiver); |
| 424 | |
| 425 | __ mov(ecx, FieldOperand(ebx, HeapObject::kMapOffset)); |
| 426 | __ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset)); |
| 427 | __ cmp(ecx, FIRST_JS_OBJECT_TYPE); |
| 428 | __ j(less, &call_to_object); |
| 429 | __ cmp(ecx, LAST_JS_OBJECT_TYPE); |
| 430 | __ j(less_equal, &done); |
| 431 | |
| 432 | __ bind(&call_to_object); |
| 433 | __ EnterInternalFrame(); // preserves eax, ebx, edi |
| 434 | |
| 435 | // Store the arguments count on the stack (smi tagged). |
| 436 | ASSERT(kSmiTag == 0); |
| 437 | __ shl(eax, kSmiTagSize); |
| 438 | __ push(eax); |
| 439 | |
| 440 | __ push(edi); // save edi across the call |
| 441 | __ push(ebx); |
| 442 | __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 443 | __ mov(ebx, eax); |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 444 | __ pop(edi); // restore edi after the call |
| 445 | |
| 446 | // Get the arguments count and untag it. |
| 447 | __ pop(eax); |
| 448 | __ shr(eax, kSmiTagSize); |
| 449 | |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 450 | __ LeaveInternalFrame(); |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 451 | __ jmp(&patch_receiver); |
| 452 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 453 | // Use the global receiver object from the called function as the receiver. |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 454 | __ bind(&use_global_receiver); |
| 455 | const int kGlobalIndex = |
| 456 | Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize; |
| 457 | __ mov(ebx, FieldOperand(esi, kGlobalIndex)); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 458 | __ mov(ebx, FieldOperand(ebx, GlobalObject::kGlobalReceiverOffset)); |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 459 | |
| 460 | __ bind(&patch_receiver); |
| 461 | __ mov(Operand(esp, eax, times_4, 0), ebx); |
| 462 | |
| 463 | __ bind(&done); |
| 464 | } |
| 465 | |
| 466 | // 4. Shift stuff one slot down the stack. |
| 467 | { Label loop; |
| 468 | __ lea(ecx, Operand(eax, +1)); // +1 ~ copy receiver too |
| 469 | __ bind(&loop); |
| 470 | __ mov(ebx, Operand(esp, ecx, times_4, 0)); |
| 471 | __ mov(Operand(esp, ecx, times_4, kPointerSize), ebx); |
| 472 | __ dec(ecx); |
| 473 | __ j(not_zero, &loop); |
| 474 | } |
| 475 | |
| 476 | // 5. Remove TOS (copy of last arguments), but keep return address. |
| 477 | __ pop(ebx); |
| 478 | __ pop(ecx); |
| 479 | __ push(ebx); |
| 480 | __ dec(eax); |
| 481 | |
| 482 | // 6. Check that function really was a function and get the code to |
| 483 | // call from the function and check that the number of expected |
| 484 | // arguments matches what we're providing. |
| 485 | { Label invoke; |
| 486 | __ test(edi, Operand(edi)); |
| 487 | __ j(not_zero, &invoke, taken); |
| 488 | __ xor_(ebx, Operand(ebx)); |
| 489 | __ GetBuiltinEntry(edx, Builtins::CALL_NON_FUNCTION); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 490 | __ jmp(Handle<Code>(builtin(ArgumentsAdaptorTrampoline)), |
| 491 | RelocInfo::CODE_TARGET); |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 492 | |
| 493 | __ bind(&invoke); |
| 494 | __ mov(edx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset)); |
| 495 | __ mov(ebx, |
| 496 | FieldOperand(edx, SharedFunctionInfo::kFormalParameterCountOffset)); |
| 497 | __ mov(edx, FieldOperand(edx, SharedFunctionInfo::kCodeOffset)); |
| 498 | __ lea(edx, FieldOperand(edx, Code::kHeaderSize)); |
| 499 | __ cmp(eax, Operand(ebx)); |
| 500 | __ j(not_equal, Handle<Code>(builtin(ArgumentsAdaptorTrampoline))); |
| 501 | } |
| 502 | |
| 503 | // 7. Jump (tail-call) to the code in register edx without checking arguments. |
| 504 | ParameterCount expected(0); |
| 505 | __ InvokeCode(Operand(edx), expected, expected, JUMP_FUNCTION); |
| 506 | } |
| 507 | |
| 508 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 509 | void Builtins::Generate_FunctionApply(MacroAssembler* masm) { |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 510 | __ EnterInternalFrame(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 511 | |
| 512 | __ push(Operand(ebp, 4 * kPointerSize)); // push this |
| 513 | __ push(Operand(ebp, 2 * kPointerSize)); // push arguments |
| 514 | __ InvokeBuiltin(Builtins::APPLY_PREPARE, CALL_FUNCTION); |
| 515 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 516 | if (FLAG_check_stack) { |
| 517 | // We need to catch preemptions right here, otherwise an unlucky preemption |
| 518 | // could show up as a failed apply. |
| 519 | ExternalReference stack_guard_limit = |
| 520 | ExternalReference::address_of_stack_guard_limit(); |
| 521 | Label retry_preemption; |
| 522 | Label no_preemption; |
| 523 | __ bind(&retry_preemption); |
| 524 | __ mov(edi, Operand::StaticVariable(stack_guard_limit)); |
| 525 | __ cmp(esp, Operand(edi)); |
| 526 | __ j(above, &no_preemption, taken); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 527 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 528 | // Preemption! |
| 529 | // Because builtins always remove the receiver from the stack, we |
| 530 | // have to fake one to avoid underflowing the stack. |
| 531 | __ push(eax); |
| 532 | __ push(Immediate(Smi::FromInt(0))); |
| 533 | |
| 534 | // Do call to runtime routine. |
| 535 | __ CallRuntime(Runtime::kStackGuard, 1); |
| 536 | __ pop(eax); |
| 537 | __ jmp(&retry_preemption); |
| 538 | |
| 539 | __ bind(&no_preemption); |
| 540 | |
| 541 | Label okay; |
| 542 | // Make ecx the space we have left. |
| 543 | __ mov(ecx, Operand(esp)); |
| 544 | __ sub(ecx, Operand(edi)); |
| 545 | // Make edx the space we need for the array when it is unrolled onto the |
| 546 | // stack. |
| 547 | __ mov(edx, Operand(eax)); |
| 548 | __ shl(edx, kPointerSizeLog2 - kSmiTagSize); |
| 549 | __ cmp(ecx, Operand(edx)); |
| 550 | __ j(greater, &okay, taken); |
| 551 | |
| 552 | // Too bad: Out of stack space. |
| 553 | __ push(Operand(ebp, 4 * kPointerSize)); // push this |
| 554 | __ push(eax); |
| 555 | __ InvokeBuiltin(Builtins::APPLY_OVERFLOW, CALL_FUNCTION); |
| 556 | __ bind(&okay); |
| 557 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 558 | |
| 559 | // Push current index and limit. |
| 560 | const int kLimitOffset = |
| 561 | StandardFrameConstants::kExpressionsOffset - 1 * kPointerSize; |
| 562 | const int kIndexOffset = kLimitOffset - 1 * kPointerSize; |
| 563 | __ push(eax); // limit |
| 564 | __ push(Immediate(0)); // index |
| 565 | |
| 566 | // Change context eagerly to get the right global object if |
| 567 | // necessary. |
| 568 | __ mov(edi, Operand(ebp, 4 * kPointerSize)); |
| 569 | __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset)); |
| 570 | |
| 571 | // Compute the receiver. |
| 572 | Label call_to_object, use_global_receiver, push_receiver; |
| 573 | __ mov(ebx, Operand(ebp, 3 * kPointerSize)); |
| 574 | __ test(ebx, Immediate(kSmiTagMask)); |
| 575 | __ j(zero, &call_to_object); |
| 576 | __ cmp(ebx, Factory::null_value()); |
| 577 | __ j(equal, &use_global_receiver); |
| 578 | __ cmp(ebx, Factory::undefined_value()); |
| 579 | __ j(equal, &use_global_receiver); |
| 580 | |
| 581 | // If given receiver is already a JavaScript object then there's no |
| 582 | // reason for converting it. |
| 583 | __ mov(ecx, FieldOperand(ebx, HeapObject::kMapOffset)); |
| 584 | __ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset)); |
| 585 | __ cmp(ecx, FIRST_JS_OBJECT_TYPE); |
| 586 | __ j(less, &call_to_object); |
| 587 | __ cmp(ecx, LAST_JS_OBJECT_TYPE); |
| 588 | __ j(less_equal, &push_receiver); |
| 589 | |
| 590 | // Convert the receiver to an object. |
| 591 | __ bind(&call_to_object); |
| 592 | __ push(ebx); |
| 593 | __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION); |
| 594 | __ mov(ebx, Operand(eax)); |
| 595 | __ jmp(&push_receiver); |
| 596 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 597 | // Use the current global receiver object as the receiver. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 598 | __ bind(&use_global_receiver); |
| 599 | const int kGlobalOffset = |
| 600 | Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize; |
| 601 | __ mov(ebx, FieldOperand(esi, kGlobalOffset)); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 602 | __ mov(ebx, FieldOperand(ebx, GlobalObject::kGlobalReceiverOffset)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 603 | |
| 604 | // Push the receiver. |
| 605 | __ bind(&push_receiver); |
| 606 | __ push(ebx); |
| 607 | |
| 608 | // Copy all arguments from the array to the stack. |
| 609 | Label entry, loop; |
| 610 | __ mov(eax, Operand(ebp, kIndexOffset)); |
| 611 | __ jmp(&entry); |
| 612 | __ bind(&loop); |
| 613 | __ mov(ecx, Operand(ebp, 2 * kPointerSize)); // load arguments |
| 614 | __ push(ecx); |
| 615 | __ push(eax); |
| 616 | |
| 617 | // Use inline caching to speed up access to arguments. |
| 618 | Handle<Code> ic(Builtins::builtin(Builtins::KeyedLoadIC_Initialize)); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 619 | __ call(ic, RelocInfo::CODE_TARGET); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 620 | |
| 621 | // Remove IC arguments from the stack and push the nth argument. |
| 622 | __ add(Operand(esp), Immediate(2 * kPointerSize)); |
| 623 | __ push(eax); |
| 624 | |
| 625 | // Update the index on the stack and in register eax. |
| 626 | __ mov(eax, Operand(ebp, kIndexOffset)); |
| 627 | __ add(Operand(eax), Immediate(1 << kSmiTagSize)); |
| 628 | __ mov(Operand(ebp, kIndexOffset), eax); |
| 629 | |
| 630 | __ bind(&entry); |
| 631 | __ cmp(eax, Operand(ebp, kLimitOffset)); |
| 632 | __ j(not_equal, &loop); |
| 633 | |
| 634 | // Invoke the function. |
| 635 | ParameterCount actual(eax); |
| 636 | __ shr(eax, kSmiTagSize); |
| 637 | __ mov(edi, Operand(ebp, 4 * kPointerSize)); |
| 638 | __ InvokeFunction(edi, actual, CALL_FUNCTION); |
| 639 | |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 640 | __ LeaveInternalFrame(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 641 | __ ret(3 * kPointerSize); // remove this, receiver, and arguments |
| 642 | } |
| 643 | |
| 644 | |
| 645 | static void EnterArgumentsAdaptorFrame(MacroAssembler* masm) { |
| 646 | __ push(ebp); |
| 647 | __ mov(ebp, Operand(esp)); |
| 648 | |
| 649 | // Store the arguments adaptor context sentinel. |
| 650 | __ push(Immediate(ArgumentsAdaptorFrame::SENTINEL)); |
| 651 | |
| 652 | // Push the function on the stack. |
| 653 | __ push(edi); |
| 654 | |
| 655 | // Preserve the number of arguments on the stack. Must preserve both |
| 656 | // eax and ebx because these registers are used when copying the |
| 657 | // arguments and the receiver. |
| 658 | ASSERT(kSmiTagSize == 1); |
| 659 | __ lea(ecx, Operand(eax, eax, times_1, kSmiTag)); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 660 | __ push(ecx); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 661 | } |
| 662 | |
| 663 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 664 | static void LeaveArgumentsAdaptorFrame(MacroAssembler* masm) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 665 | // Retrieve the number of arguments from the stack. |
| 666 | __ mov(ebx, Operand(ebp, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 667 | |
| 668 | // Leave the frame. |
| 669 | __ leave(); |
| 670 | |
| 671 | // Remove caller arguments from the stack. |
| 672 | ASSERT(kSmiTagSize == 1 && kSmiTag == 0); |
| 673 | __ pop(ecx); |
| 674 | __ lea(esp, Operand(esp, ebx, times_2, 1 * kPointerSize)); // 1 ~ receiver |
| 675 | __ push(ecx); |
| 676 | } |
| 677 | |
| 678 | |
| 679 | void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) { |
| 680 | // ----------- S t a t e ------------- |
| 681 | // -- eax : actual number of arguments |
| 682 | // -- ebx : expected number of arguments |
| 683 | // -- edx : code entry to call |
| 684 | // ----------------------------------- |
| 685 | |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 686 | Label invoke, dont_adapt_arguments; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 687 | __ IncrementCounter(&Counters::arguments_adaptors, 1); |
| 688 | |
| 689 | Label enough, too_few; |
| 690 | __ cmp(eax, Operand(ebx)); |
| 691 | __ j(less, &too_few); |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 692 | __ cmp(ebx, SharedFunctionInfo::kDontAdaptArgumentsSentinel); |
| 693 | __ j(equal, &dont_adapt_arguments); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 694 | |
| 695 | { // Enough parameters: Actual >= expected. |
| 696 | __ bind(&enough); |
| 697 | EnterArgumentsAdaptorFrame(masm); |
| 698 | |
| 699 | // Copy receiver and all expected arguments. |
| 700 | const int offset = StandardFrameConstants::kCallerSPOffset; |
| 701 | __ lea(eax, Operand(ebp, eax, times_4, offset)); |
| 702 | __ mov(ecx, -1); // account for receiver |
| 703 | |
| 704 | Label copy; |
| 705 | __ bind(©); |
| 706 | __ inc(ecx); |
| 707 | __ push(Operand(eax, 0)); |
| 708 | __ sub(Operand(eax), Immediate(kPointerSize)); |
| 709 | __ cmp(ecx, Operand(ebx)); |
| 710 | __ j(less, ©); |
| 711 | __ jmp(&invoke); |
| 712 | } |
| 713 | |
| 714 | { // Too few parameters: Actual < expected. |
| 715 | __ bind(&too_few); |
| 716 | EnterArgumentsAdaptorFrame(masm); |
| 717 | |
| 718 | // Copy receiver and all actual arguments. |
| 719 | const int offset = StandardFrameConstants::kCallerSPOffset; |
| 720 | __ lea(edi, Operand(ebp, eax, times_4, offset)); |
| 721 | __ mov(ecx, -1); // account for receiver |
| 722 | |
| 723 | Label copy; |
| 724 | __ bind(©); |
| 725 | __ inc(ecx); |
| 726 | __ push(Operand(edi, 0)); |
| 727 | __ sub(Operand(edi), Immediate(kPointerSize)); |
| 728 | __ cmp(ecx, Operand(eax)); |
| 729 | __ j(less, ©); |
| 730 | |
| 731 | // Fill remaining expected arguments with undefined values. |
| 732 | Label fill; |
| 733 | __ bind(&fill); |
| 734 | __ inc(ecx); |
| 735 | __ push(Immediate(Factory::undefined_value())); |
| 736 | __ cmp(ecx, Operand(ebx)); |
| 737 | __ j(less, &fill); |
| 738 | |
| 739 | // Restore function pointer. |
| 740 | __ mov(edi, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset)); |
| 741 | } |
| 742 | |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 743 | // Call the entry point. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 744 | __ bind(&invoke); |
| 745 | __ call(Operand(edx)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 746 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 747 | // Leave frame and return. |
| 748 | LeaveArgumentsAdaptorFrame(masm); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 749 | __ ret(0); |
| 750 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 751 | // ------------------------------------------- |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 752 | // Dont adapt arguments. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 753 | // ------------------------------------------- |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 754 | __ bind(&dont_adapt_arguments); |
| 755 | __ jmp(Operand(edx)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 756 | } |
| 757 | |
| 758 | |
| 759 | static void Generate_DebugBreakCallHelper(MacroAssembler* masm, |
| 760 | RegList pointer_regs, |
| 761 | bool convert_call_to_jmp) { |
| 762 | // Save the content of all general purpose registers in memory. This copy in |
| 763 | // memory is later pushed onto the JS expression stack for the fake JS frame |
| 764 | // generated and also to the C frame generated on top of that. In the JS |
| 765 | // frame ONLY the registers containing pointers will be pushed on the |
| 766 | // expression stack. This causes the GC to update these pointers so that |
| 767 | // they will have the correct value when returning from the debugger. |
| 768 | __ SaveRegistersToMemory(kJSCallerSaved); |
| 769 | |
| 770 | // Enter an internal frame. |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 771 | __ EnterInternalFrame(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 772 | |
| 773 | // Store the registers containing object pointers on the expression stack to |
| 774 | // make sure that these are correctly updated during GC. |
| 775 | __ PushRegistersFromMemory(pointer_regs); |
| 776 | |
| 777 | #ifdef DEBUG |
| 778 | __ RecordComment("// Calling from debug break to runtime - come in - over"); |
| 779 | #endif |
| 780 | __ Set(eax, Immediate(0)); // no arguments |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 781 | __ mov(ebx, Immediate(ExternalReference::debug_break())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 782 | |
| 783 | CEntryDebugBreakStub ceb; |
| 784 | __ CallStub(&ceb); |
| 785 | |
| 786 | // Restore the register values containing object pointers from the expression |
| 787 | // stack in the reverse order as they where pushed. |
| 788 | __ PopRegistersToMemory(pointer_regs); |
| 789 | |
| 790 | // Get rid of the internal frame. |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 791 | __ LeaveInternalFrame(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 792 | |
| 793 | // If this call did not replace a call but patched other code then there will |
| 794 | // be an unwanted return address left on the stack. Here we get rid of that. |
| 795 | if (convert_call_to_jmp) { |
| 796 | __ pop(eax); |
| 797 | } |
| 798 | |
| 799 | // Finally restore all registers. |
| 800 | __ RestoreRegistersFromMemory(kJSCallerSaved); |
| 801 | |
| 802 | // Now that the break point has been handled, resume normal execution by |
| 803 | // jumping to the target address intended by the caller and that was |
| 804 | // overwritten by the address of DebugBreakXXX. |
| 805 | ExternalReference after_break_target = |
| 806 | ExternalReference(Debug_Address::AfterBreakTarget()); |
| 807 | __ jmp(Operand::StaticVariable(after_break_target)); |
| 808 | } |
| 809 | |
| 810 | |
| 811 | void Builtins::Generate_LoadIC_DebugBreak(MacroAssembler* masm) { |
| 812 | // Register state for IC load call (from ic-ia32.cc). |
| 813 | // ----------- S t a t e ------------- |
| 814 | // -- ecx : name |
| 815 | // ----------------------------------- |
| 816 | Generate_DebugBreakCallHelper(masm, ecx.bit(), false); |
| 817 | } |
| 818 | |
| 819 | |
| 820 | void Builtins::Generate_StoreIC_DebugBreak(MacroAssembler* masm) { |
| 821 | // REgister state for IC store call (from ic-ia32.cc). |
| 822 | // ----------- S t a t e ------------- |
| 823 | // -- eax : value |
| 824 | // -- ecx : name |
| 825 | // ----------------------------------- |
| 826 | Generate_DebugBreakCallHelper(masm, eax.bit() | ecx.bit(), false); |
| 827 | } |
| 828 | |
| 829 | |
| 830 | void Builtins::Generate_KeyedLoadIC_DebugBreak(MacroAssembler* masm) { |
| 831 | // Register state for keyed IC load call (from ic-ia32.cc). |
| 832 | // ----------- S t a t e ------------- |
| 833 | // No registers used on entry. |
| 834 | // ----------------------------------- |
| 835 | Generate_DebugBreakCallHelper(masm, 0, false); |
| 836 | } |
| 837 | |
| 838 | |
| 839 | void Builtins::Generate_KeyedStoreIC_DebugBreak(MacroAssembler* masm) { |
| 840 | // Register state for keyed IC load call (from ic-ia32.cc). |
| 841 | // ----------- S t a t e ------------- |
| 842 | // -- eax : value |
| 843 | // ----------------------------------- |
| 844 | // Register eax contains an object that needs to be pushed on the |
| 845 | // expression stack of the fake JS frame. |
| 846 | Generate_DebugBreakCallHelper(masm, eax.bit(), false); |
| 847 | } |
| 848 | |
| 849 | |
| 850 | void Builtins::Generate_CallIC_DebugBreak(MacroAssembler* masm) { |
| 851 | // Register state for keyed IC call call (from ic-ia32.cc) |
| 852 | // ----------- S t a t e ------------- |
| 853 | // -- eax: number of arguments |
| 854 | // ----------------------------------- |
| 855 | // The number of arguments in eax is not smi encoded. |
| 856 | Generate_DebugBreakCallHelper(masm, 0, false); |
| 857 | } |
| 858 | |
| 859 | |
| 860 | void Builtins::Generate_ConstructCall_DebugBreak(MacroAssembler* masm) { |
v8.team.kasperl | 727e995 | 2008-09-02 14:56:44 +0000 | [diff] [blame] | 861 | // Register state just before return from JS function (from codegen-ia32.cc). |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 862 | // eax is the actual number of arguments not encoded as a smi see comment |
| 863 | // above IC call. |
| 864 | // ----------- S t a t e ------------- |
| 865 | // -- eax: number of arguments |
| 866 | // ----------------------------------- |
| 867 | // The number of arguments in eax is not smi encoded. |
| 868 | Generate_DebugBreakCallHelper(masm, 0, false); |
| 869 | } |
| 870 | |
| 871 | |
| 872 | void Builtins::Generate_Return_DebugBreak(MacroAssembler* masm) { |
| 873 | // Register state just before return from JS function (from codegen-ia32.cc). |
| 874 | // ----------- S t a t e ------------- |
| 875 | // -- eax: return value |
| 876 | // ----------------------------------- |
| 877 | Generate_DebugBreakCallHelper(masm, eax.bit(), true); |
| 878 | } |
| 879 | |
| 880 | |
| 881 | void Builtins::Generate_Return_DebugBreakEntry(MacroAssembler* masm) { |
| 882 | // OK to clobber ebx as we are returning from a JS function in the code |
| 883 | // generated by Ia32CodeGenerator::ExitJSFrame. |
| 884 | ExternalReference debug_break_return = |
| 885 | ExternalReference(Debug_Address::DebugBreakReturn()); |
| 886 | __ mov(ebx, Operand::StaticVariable(debug_break_return)); |
| 887 | __ add(Operand(ebx), Immediate(Code::kHeaderSize - kHeapObjectTag)); |
| 888 | __ jmp(Operand(ebx)); |
| 889 | } |
| 890 | |
| 891 | |
| 892 | void Builtins::Generate_StubNoRegisters_DebugBreak(MacroAssembler* masm) { |
| 893 | // Register state for stub CallFunction (from CallFunctionStub in ic-ia32.cc). |
| 894 | // ----------- S t a t e ------------- |
| 895 | // No registers used on entry. |
| 896 | // ----------------------------------- |
| 897 | Generate_DebugBreakCallHelper(masm, 0, false); |
| 898 | } |
| 899 | |
| 900 | #undef __ |
| 901 | |
| 902 | } } // namespace v8::internal |