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| 1 // Copyright 2006-2008 the V8 project authors. All rights reserved. | |
| 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 #ifndef V8_FRAMES_ARM_H_ | |
| 29 #define V8_FRAMES_ARM_H_ | |
| 30 | |
| 31 namespace v8 { namespace internal { | |
| 32 | |
| 33 | |
| 34 // The ARM ABI does not specify the usage of register r9, which may be reserved | |
| 35 // as the static base or thread register on some platforms, in which case we | |
| 36 // leave it alone. Adjust the value of kR9Available accordingly: | |
| 37 static const int kR9Available = 1; // 1 if available to us, 0 if reserved | |
| 38 | |
| 39 | |
| 40 // Register list in load/store instructions | |
| 41 // Note that the bit values must match those used in actual instruction encoding | |
| 42 static const int kNumRegs = 16; | |
| 43 | |
| 44 | |
| 45 // Caller-saved/arguments registers | |
| 46 static const RegList kJSCallerSaved = | |
| 47 1 << 0 | // r0 a1 | |
| 48 1 << 1 | // r1 a2 | |
| 49 1 << 2 | // r2 a3 | |
| 50 1 << 3; // r3 a4 | |
| 51 | |
| 52 static const int kNumJSCallerSaved = 4; | |
| 53 | |
| 54 typedef Object* JSCallerSavedBuffer[kNumJSCallerSaved]; | |
| 55 | |
| 56 // Return the code of the n-th caller-saved register available to JavaScript | |
| 57 // e.g. JSCallerSavedReg(0) returns r0.code() == 0 | |
| 58 int JSCallerSavedCode(int n); | |
| 59 | |
| 60 | |
| 61 // Callee-saved registers preserved when switching from C to JavaScript | |
| 62 static const RegList kCalleeSaved = | |
| 63 1 << 4 | // r4 v1 | |
| 64 1 << 5 | // r5 v2 | |
| 65 1 << 6 | // r6 v3 | |
| 66 1 << 7 | // r7 v4 | |
| 67 1 << 8 | // r8 v5 (cp in JavaScript code) | |
| 68 kR9Available | |
| 69 << 9 | // r9 v6 | |
| 70 1 << 10 | // r10 v7 (pp in JavaScript code) | |
| 71 1 << 11; // r11 v8 (fp in JavaScript code) | |
| 72 | |
| 73 static const int kNumCalleeSaved = 7 + kR9Available; | |
| 74 | |
| 75 | |
| 76 // ---------------------------------------------------- | |
| 77 | |
| 78 | |
| 79 class StackHandlerConstants : public AllStatic { | |
| 80 public: | |
| 81 // TODO(1233780): Get rid of the code slot in stack handlers. | |
| 82 static const int kCodeOffset = 0 * kPointerSize; | |
| 83 static const int kNextOffset = 1 * kPointerSize; | |
| 84 static const int kStateOffset = 2 * kPointerSize; | |
| 85 static const int kPPOffset = 3 * kPointerSize; | |
| 86 static const int kFPOffset = 4 * kPointerSize; | |
| 87 static const int kPCOffset = 5 * kPointerSize; | |
| 88 | |
| 89 static const int kAddressDisplacement = -1 * kPointerSize; | |
| 90 static const int kSize = kPCOffset + kPointerSize; | |
| 91 }; | |
| 92 | |
| 93 | |
| 94 class EntryFrameConstants : public AllStatic { | |
| 95 public: | |
| 96 static const int kCallerFPOffset = -3 * kPointerSize; | |
| 97 }; | |
| 98 | |
| 99 | |
| 100 class ExitFrameConstants : public AllStatic { | |
| 101 public: | |
| 102 // Exit frames have a debug marker on the stack. | |
| 103 static const int kSPDisplacement = -1 * kPointerSize; | |
| 104 | |
| 105 // The debug marker is just above the frame pointer. | |
| 106 static const int kDebugMarkOffset = -1 * kPointerSize; | |
| 107 | |
| 108 static const int kSavedRegistersOffset = 0 * kPointerSize; | |
| 109 | |
| 110 // Let the parameters pointer for exit frames point just below the | |
| 111 // frame structure on the stack. | |
| 112 static const int kPPDisplacement = 3 * kPointerSize; | |
| 113 | |
| 114 // The caller fields are below the frame pointer on the stack. | |
| 115 static const int kCallerFPOffset = +0 * kPointerSize; | |
| 116 static const int kCallerPPOffset = +1 * kPointerSize; | |
| 117 static const int kCallerPCOffset = +2 * kPointerSize; | |
| 118 }; | |
| 119 | |
| 120 | |
| 121 class StandardFrameConstants : public AllStatic { | |
| 122 public: | |
| 123 static const int kExpressionsOffset = -3 * kPointerSize; | |
| 124 static const int kMarkerOffset = -2 * kPointerSize; | |
| 125 static const int kContextOffset = -1 * kPointerSize; | |
| 126 static const int kCallerFPOffset = 0 * kPointerSize; | |
| 127 static const int kCallerPCOffset = +1 * kPointerSize; | |
| 128 static const int kCallerSPOffset = +2 * kPointerSize; | |
| 129 }; | |
| 130 | |
| 131 | |
| 132 class JavaScriptFrameConstants : public AllStatic { | |
| 133 public: | |
| 134 // FP-relative. | |
| 135 static const int kLocal0Offset = StandardFrameConstants::kExpressionsOffset; | |
| 136 static const int kSavedRegistersOffset = +2 * kPointerSize; | |
| 137 static const int kFunctionOffset = StandardFrameConstants::kMarkerOffset; | |
| 138 | |
| 139 // PP-relative. | |
| 140 static const int kParam0Offset = -2 * kPointerSize; | |
| 141 static const int kReceiverOffset = -1 * kPointerSize; | |
| 142 }; | |
| 143 | |
| 144 | |
| 145 class ArgumentsAdaptorFrameConstants : public AllStatic { | |
| 146 public: | |
| 147 static const int kLengthOffset = StandardFrameConstants::kExpressionsOffset; | |
| 148 }; | |
| 149 | |
| 150 | |
| 151 class InternalFrameConstants : public AllStatic { | |
| 152 public: | |
| 153 static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset; | |
| 154 }; | |
| 155 | |
| 156 | |
| 157 inline Object* JavaScriptFrame::function_slot_object() const { | |
| 158 const int offset = JavaScriptFrameConstants::kFunctionOffset; | |
| 159 return Memory::Object_at(fp() + offset); | |
| 160 } | |
| 161 | |
| 162 | |
| 163 // ---------------------------------------------------- | |
| 164 | |
| 165 | |
| 166 | |
| 167 | |
| 168 // lower | Stack | | |
| 169 // addresses | ^ | | |
| 170 // | | | | |
| 171 // | | | |
| 172 // | JS frame | | |
| 173 // | | | |
| 174 // | | | |
| 175 // ----------- +=============+ <--- sp (stack pointer) | |
| 176 // | function | | |
| 177 // +-------------+ | |
| 178 // +-------------+ | |
| 179 // | | | |
| 180 // | expressions | | |
| 181 // | | | |
| 182 // +-------------+ | |
| 183 // | | | |
| 184 // a | locals | | |
| 185 // c | | | |
| 186 // t +- - - - - - -+ <--- | |
| 187 // i -4 | local0 | ^ | |
| 188 // v +-------------+ | | |
| 189 // a -3 | code | | | |
| 190 // t +-------------+ | kLocal0Offset | |
| 191 // i -2 | context | | | |
| 192 // o +-------------+ | | |
| 193 // n -1 | args_length | v | |
| 194 // +-------------+ <--- fp (frame pointer) | |
| 195 // 0 | caller_pp | | |
| 196 // f +-------------+ | |
| 197 // r 1 | caller_fp | | |
| 198 // a +-------------+ | |
| 199 // m 2 | sp_on_exit | (pp if return, caller_sp if no return) | |
| 200 // e +-------------+ | |
| 201 // 3 | caller_pc | | |
| 202 // +-------------+ <--- caller_sp (incl. parameters) | |
| 203 // | | | |
| 204 // | parameters | | |
| 205 // | | | |
| 206 // +- - - - - - -+ <--- | |
| 207 // -2 | parameter0 | ^ | |
| 208 // +-------------+ | kParam0Offset | |
| 209 // -1 | receiver | v | |
| 210 // ----------- +=============+ <--- pp (parameter pointer, r10) | |
| 211 // 0 | function | | |
| 212 // +-------------+ | |
| 213 // | | | |
| 214 // |caller-saved | (must be valid JS values, traversed during GC) | |
| 215 // | regs | | |
| 216 // | | | |
| 217 // +-------------+ | |
| 218 // | | | |
| 219 // | caller | | |
| 220 // higher | expressions | | |
| 221 // addresses | | | |
| 222 // | | | |
| 223 // | JS frame | | |
| 224 | |
| 225 | |
| 226 | |
| 227 // Handler frames (part of expressions of JS frames): | |
| 228 | |
| 229 // lower | Stack | | |
| 230 // addresses | ^ | | |
| 231 // | | | | |
| 232 // | | | |
| 233 // h | expressions | | |
| 234 // a | | | |
| 235 // n +-------------+ | |
| 236 // d -1 | code | | |
| 237 // l +-------------+ <--- handler sp | |
| 238 // e 0 | next_sp | link to next handler (next handler's sp) | |
| 239 // r +-------------+ | |
| 240 // 1 | state | | |
| 241 // f +-------------+ | |
| 242 // r 2 | pp | | |
| 243 // a +-------------+ | |
| 244 // m 3 | fp | | |
| 245 // e +-------------+ | |
| 246 // 4 | pc | | |
| 247 // +-------------+ | |
| 248 // | | | |
| 249 // higher | expressions | | |
| 250 // addresses | | | |
| 251 | |
| 252 | |
| 253 | |
| 254 // JS entry frames: When calling from C to JS, we construct two extra | |
| 255 // frames: An entry frame (C) and a trampoline frame (JS). The | |
| 256 // following pictures shows the two frames: | |
| 257 | |
| 258 // lower | Stack | | |
| 259 // addresses | ^ | | |
| 260 // | | | | |
| 261 // | | | |
| 262 // | JS frame | | |
| 263 // | | | |
| 264 // | | | |
| 265 // ----------- +=============+ <--- sp (stack pointer) | |
| 266 // | | | |
| 267 // | parameters | | |
| 268 // t | | | |
| 269 // r +- - - - - - -+ | |
| 270 // a | parameter0 | | |
| 271 // m +-------------+ | |
| 272 // p | receiver | | |
| 273 // o +-------------+ | |
| 274 // l | function | | |
| 275 // i +-------------+ | |
| 276 // n -3 | code | | |
| 277 // e +-------------+ | |
| 278 // -2 | NULL | context is always NULL | |
| 279 // +-------------+ | |
| 280 // f -1 | 0 | args_length is always zero | |
| 281 // r +-------------+ <--- fp (frame pointer) | |
| 282 // a 0 | NULL | caller pp is always NULL for entries | |
| 283 // m +-------------+ | |
| 284 // e 1 | caller_fp | | |
| 285 // +-------------+ | |
| 286 // 2 | sp_on_exit | (caller_sp) | |
| 287 // +-------------+ | |
| 288 // 3 | caller_pc | | |
| 289 // ----------- +=============+ <--- caller_sp == pp | |
| 290 // . ^ | |
| 291 // . | try-handler, fake, not GC'ed | |
| 292 // . v | |
| 293 // +-------------+ <--- | |
| 294 // -2 | next top pp | | |
| 295 // +-------------+ | |
| 296 // -1 | next top fp | | |
| 297 // +-------------+ <--- fp | |
| 298 // | r4 | r4-r9 holding non-JS values must be preserved | |
| 299 // +-------------+ | |
| 300 // J | r5 | before being initialized not to confuse GC | |
| 301 // S +-------------+ | |
| 302 // | r6 | | |
| 303 // +-------------+ | |
| 304 // e | r7 | | |
| 305 // n +-------------+ | |
| 306 // t | r8 | | |
| 307 // r +-------------+ | |
| 308 // y [ | r9 | ] only if r9 available | |
| 309 // +-------------+ | |
| 310 // | r10 | | |
| 311 // f +-------------+ | |
| 312 // r | r11 | | |
| 313 // a +-------------+ | |
| 314 // m | caller_sp | | |
| 315 // e +-------------+ | |
| 316 // | caller_pc | | |
| 317 // +-------------+ <--- caller_sp | |
| 318 // | argv | passed on stack from C code | |
| 319 // +-------------+ | |
| 320 // | | | |
| 321 // higher | | | |
| 322 // addresses | C frame | | |
| 323 | |
| 324 | |
| 325 // The first 4 args are passed from C in r0-r3 and are not spilled on entry: | |
| 326 // r0: code entry | |
| 327 // r1: function | |
| 328 // r2: receiver | |
| 329 // r3: argc | |
| 330 // [sp+0]: argv | |
| 331 | |
| 332 | |
| 333 // C entry frames: When calling from JS to C, we construct one extra | |
| 334 // frame: | |
| 335 | |
| 336 // lower | Stack | | |
| 337 // addresses | ^ | | |
| 338 // | | | | |
| 339 // | | | |
| 340 // | C frame | | |
| 341 // | | | |
| 342 // | | | |
| 343 // ----------- +=============+ <--- sp (stack pointer) | |
| 344 // | | | |
| 345 // | parameters | (first 4 args are passed in r0-r3) | |
| 346 // | | | |
| 347 // +-------------+ <--- fp (frame pointer) | |
| 348 // f 4/5 | caller_fp | | |
| 349 // r +-------------+ | |
| 350 // a 5/6 | sp_on_exit | (pp) | |
| 351 // m +-------------+ | |
| 352 // e 6/7 | caller_pc | | |
| 353 // +-------------+ <--- caller_sp (incl. parameters) | |
| 354 // 7/8 | | | |
| 355 // | parameters | | |
| 356 // | | | |
| 357 // +- - - - - - -+ <--- | |
| 358 // -2 | parameter0 | ^ | |
| 359 // +-------------+ | kParam0Offset | |
| 360 // -1 | receiver | v | |
| 361 // ----------- +=============+ <--- pp (parameter pointer, r10) | |
| 362 // 0 | function | | |
| 363 // +-------------+ | |
| 364 // | | | |
| 365 // |caller-saved | | |
| 366 // | regs | | |
| 367 // | | | |
| 368 // +-------------+ | |
| 369 // | | | |
| 370 // | caller | | |
| 371 // | expressions | | |
| 372 // | | | |
| 373 // higher | | | |
| 374 // addresses | JS frame | | |
| 375 | |
| 376 | |
| 377 } } // namespace v8::internal | |
| 378 | |
| 379 #endif // V8_FRAMES_ARM_H_ | |
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Chromium Code Reviews
Issue 92068:
Move backend specific files to separate directories. (Closed)
