christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1 | // Copyright (c) 1994-2006 Sun Microsystems Inc. |
| 2 | // All Rights Reserved. |
| 3 | // |
| 4 | // Redistribution and use in source and binary forms, with or without |
| 5 | // modification, are permitted provided that the following conditions are |
| 6 | // met: |
| 7 | // |
| 8 | // - Redistributions of source code must retain the above copyright notice, |
| 9 | // this list of conditions and the following disclaimer. |
| 10 | // |
| 11 | // - Redistribution in binary form must reproduce the above copyright |
| 12 | // notice, this list of conditions and the following disclaimer in the |
| 13 | // documentation and/or other materials provided with the distribution. |
| 14 | // |
| 15 | // - Neither the name of Sun Microsystems or the names of contributors may |
| 16 | // be used to endorse or promote products derived from this software without |
| 17 | // specific prior written permission. |
| 18 | // |
| 19 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| 20 | // IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| 21 | // THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 22 | // PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| 23 | // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 24 | // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 25 | // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 26 | // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 27 | // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 28 | // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 29 | // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 30 | |
| 31 | // The original source code covered by the above license above has been |
| 32 | // modified significantly by Google Inc. |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 33 | // Copyright 2006-2008 the V8 project authors. All rights reserved. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 34 | |
| 35 | #ifndef V8_ASSEMBLER_H_ |
| 36 | #define V8_ASSEMBLER_H_ |
| 37 | |
| 38 | #include "runtime.h" |
| 39 | #include "top.h" |
| 40 | #include "zone-inl.h" |
| 41 | |
| 42 | namespace v8 { namespace internal { |
| 43 | |
| 44 | |
| 45 | // ----------------------------------------------------------------------------- |
| 46 | // Labels represent pc locations; they are typically jump or call targets. |
| 47 | // After declaration, a label can be freely used to denote known or (yet) |
| 48 | // unknown pc location. Assembler::bind() is used to bind a label to the |
| 49 | // current pc. A label can be bound only once. |
| 50 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 51 | class Label : public ZoneObject { // LabelShadows are dynamically allocated. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 52 | public: |
| 53 | INLINE(Label()) { Unuse(); } |
| 54 | INLINE(~Label()) { ASSERT(!is_linked()); } |
| 55 | |
| 56 | INLINE(void Unuse()) { pos_ = 0; } |
| 57 | |
| 58 | INLINE(bool is_bound() const) { return pos_ < 0; } |
| 59 | INLINE(bool is_unused() const) { return pos_ == 0; } |
| 60 | INLINE(bool is_linked() const) { return pos_ > 0; } |
| 61 | |
| 62 | // Returns the position of bound or linked labels. Cannot be used |
| 63 | // for unused labels. |
| 64 | int pos() const; |
| 65 | |
| 66 | private: |
| 67 | // pos_ encodes both the binding state (via its sign) |
| 68 | // and the binding position (via its value) of a label. |
| 69 | // |
| 70 | // pos_ < 0 bound label, pos() returns the jump target position |
| 71 | // pos_ == 0 unused label |
| 72 | // pos_ > 0 linked label, pos() returns the last reference position |
| 73 | int pos_; |
| 74 | |
| 75 | void bind_to(int pos) { |
| 76 | pos_ = -pos - 1; |
| 77 | ASSERT(is_bound()); |
| 78 | } |
| 79 | void link_to(int pos) { |
| 80 | pos_ = pos + 1; |
| 81 | ASSERT(is_linked()); |
| 82 | } |
| 83 | |
| 84 | friend class Assembler; |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame^] | 85 | friend class RegexpAssembler; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 86 | friend class Displacement; |
| 87 | friend class LabelShadow; |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame^] | 88 | friend class RegExpMacroAssemblerIrregexp; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 89 | }; |
| 90 | |
| 91 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 92 | // A LabelShadow represents a label that is temporarily shadowed by another |
| 93 | // label (represented by the original label during shadowing). They are used |
| 94 | // to catch jumps to labels in certain contexts, e.g. try blocks. After |
| 95 | // shadowing ends, the formerly shadowed label is again represented by the |
| 96 | // original label and the LabelShadow can be used as a label in its own |
| 97 | // right, representing the formerly shadowing label. |
| 98 | class LabelShadow : public Label { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 99 | public: |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 100 | explicit LabelShadow(Label* original) { |
| 101 | ASSERT(original != NULL); |
| 102 | original_label_ = original; |
| 103 | original_pos_ = original->pos_; |
| 104 | original->Unuse(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 105 | #ifdef DEBUG |
| 106 | is_shadowing_ = true; |
| 107 | #endif |
| 108 | } |
| 109 | |
| 110 | ~LabelShadow() { |
| 111 | ASSERT(!is_shadowing_); |
| 112 | } |
| 113 | |
| 114 | void StopShadowing() { |
| 115 | ASSERT(is_shadowing_ && is_unused()); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 116 | pos_ = original_label_->pos_; |
| 117 | original_label_->pos_ = original_pos_; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 118 | #ifdef DEBUG |
| 119 | is_shadowing_ = false; |
| 120 | #endif |
| 121 | } |
| 122 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 123 | Label* original_label() const { return original_label_; } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 124 | |
| 125 | private: |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 126 | // During shadowing, the currently shadowing label. After shadowing, the |
| 127 | // label that was shadowed. |
| 128 | Label* original_label_; |
| 129 | |
| 130 | // During shadowing, the saved state of the original label. |
| 131 | int original_pos_; |
| 132 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 133 | #ifdef DEBUG |
| 134 | bool is_shadowing_; |
| 135 | #endif |
| 136 | }; |
| 137 | |
| 138 | |
| 139 | // ----------------------------------------------------------------------------- |
| 140 | // Relocation information |
| 141 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 142 | |
| 143 | // Relocation information consists of the address (pc) of the datum |
| 144 | // to which the relocation information applies, the relocation mode |
| 145 | // (rmode), and an optional data field. The relocation mode may be |
| 146 | // "descriptive" and not indicate a need for relocation, but simply |
| 147 | // describe a property of the datum. Such rmodes are useful for GC |
| 148 | // and nice disassembly output. |
| 149 | |
| 150 | class RelocInfo BASE_EMBEDDED { |
| 151 | public: |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 152 | // The constant kNoPosition is used with the collecting of source positions |
| 153 | // in the relocation information. Two types of source positions are collected |
| 154 | // "position" (RelocMode position) and "statement position" (RelocMode |
| 155 | // statement_position). The "position" is collected at places in the source |
| 156 | // code which are of interest when making stack traces to pin-point the source |
| 157 | // location of a stack frame as close as possible. The "statement position" is |
| 158 | // collected at the beginning at each statement, and is used to indicate |
| 159 | // possible break locations. kNoPosition is used to indicate an |
| 160 | // invalid/uninitialized position value. |
| 161 | static const int kNoPosition = -1; |
| 162 | |
| 163 | enum Mode { |
| 164 | // Please note the order is important (see IsCodeTarget, IsGCRelocMode). |
| 165 | CONSTRUCT_CALL, // code target that is a call to a JavaScript constructor. |
| 166 | CODE_TARGET_CONTEXT, // code target used for contextual loads. |
| 167 | CODE_TARGET, // code target which is not any of the above. |
| 168 | EMBEDDED_OBJECT, |
| 169 | EMBEDDED_STRING, |
| 170 | |
| 171 | // Everything after runtime_entry (inclusive) is not GC'ed. |
| 172 | RUNTIME_ENTRY, |
| 173 | JS_RETURN, // Marks start of the ExitJSFrame code. |
| 174 | COMMENT, |
| 175 | POSITION, // See comment for kNoPosition above. |
| 176 | STATEMENT_POSITION, // See comment for kNoPosition above. |
| 177 | EXTERNAL_REFERENCE, // The address of an external C++ function. |
| 178 | INTERNAL_REFERENCE, // An address inside the same function. |
| 179 | |
| 180 | // add more as needed |
| 181 | // Pseudo-types |
| 182 | NUMBER_OF_MODES, // must be no greater than 14 - see RelocInfoWriter |
| 183 | NONE, // never recorded |
| 184 | LAST_CODE_ENUM = CODE_TARGET, |
| 185 | LAST_GCED_ENUM = EMBEDDED_STRING |
| 186 | }; |
| 187 | |
| 188 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 189 | RelocInfo() {} |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 190 | RelocInfo(byte* pc, Mode rmode, intptr_t data) |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 191 | : pc_(pc), rmode_(rmode), data_(data) { |
| 192 | } |
| 193 | |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 194 | static inline bool IsConstructCall(Mode mode) { |
| 195 | return mode == CONSTRUCT_CALL; |
| 196 | } |
| 197 | static inline bool IsCodeTarget(Mode mode) { |
| 198 | return mode <= LAST_CODE_ENUM; |
| 199 | } |
| 200 | // Is the relocation mode affected by GC? |
| 201 | static inline bool IsGCRelocMode(Mode mode) { |
| 202 | return mode <= LAST_GCED_ENUM; |
| 203 | } |
| 204 | static inline bool IsJSReturn(Mode mode) { |
| 205 | return mode == JS_RETURN; |
| 206 | } |
| 207 | static inline bool IsComment(Mode mode) { |
| 208 | return mode == COMMENT; |
| 209 | } |
| 210 | static inline bool IsPosition(Mode mode) { |
| 211 | return mode == POSITION || mode == STATEMENT_POSITION; |
| 212 | } |
| 213 | static inline bool IsStatementPosition(Mode mode) { |
| 214 | return mode == STATEMENT_POSITION; |
| 215 | } |
| 216 | static inline bool IsExternalReference(Mode mode) { |
| 217 | return mode == EXTERNAL_REFERENCE; |
| 218 | } |
| 219 | static inline bool IsInternalReference(Mode mode) { |
| 220 | return mode == INTERNAL_REFERENCE; |
| 221 | } |
| 222 | static inline int ModeMask(Mode mode) { return 1 << mode; } |
| 223 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 224 | // Accessors |
| 225 | byte* pc() const { return pc_; } |
| 226 | void set_pc(byte* pc) { pc_ = pc; } |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 227 | Mode rmode() const { return rmode_; } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 228 | intptr_t data() const { return data_; } |
| 229 | |
| 230 | // Apply a relocation by delta bytes |
| 231 | INLINE(void apply(int delta)); |
| 232 | |
| 233 | // Read/modify the code target in the branch/call instruction this relocation |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 234 | // applies to; can only be called if IsCodeTarget(rmode_) |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 235 | INLINE(Address target_address()); |
| 236 | INLINE(void set_target_address(Address target)); |
| 237 | INLINE(Object* target_object()); |
| 238 | INLINE(Object** target_object_address()); |
| 239 | INLINE(void set_target_object(Object* target)); |
| 240 | |
| 241 | // Read/modify the reference in the instruction this relocation |
| 242 | // applies to; can only be called if rmode_ is external_reference |
| 243 | INLINE(Address* target_reference_address()); |
| 244 | |
| 245 | // Read/modify the address of a call instruction. This is used to relocate |
| 246 | // the break points where straight-line code is patched with a call |
| 247 | // instruction. |
| 248 | INLINE(Address call_address()); |
| 249 | INLINE(void set_call_address(Address target)); |
| 250 | INLINE(Object* call_object()); |
| 251 | INLINE(Object** call_object_address()); |
| 252 | INLINE(void set_call_object(Object* target)); |
| 253 | |
| 254 | // Patch the code with some other code. |
| 255 | void patch_code(byte* instructions, int instruction_count); |
| 256 | |
| 257 | // Patch the code with a call. |
| 258 | void patch_code_with_call(Address target, int guard_bytes); |
| 259 | INLINE(bool is_call_instruction()); |
| 260 | |
mads.s.ager@gmail.com | 769cc96 | 2008-08-06 10:02:49 +0000 | [diff] [blame] | 261 | #ifdef ENABLE_DISASSEMBLER |
| 262 | // Printing |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 263 | static const char* RelocModeName(Mode rmode); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 264 | void Print(); |
mads.s.ager@gmail.com | 769cc96 | 2008-08-06 10:02:49 +0000 | [diff] [blame] | 265 | #endif // ENABLE_DISASSEMBLER |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 266 | #ifdef DEBUG |
| 267 | // Debugging |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 268 | void Verify(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 269 | #endif |
| 270 | |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 271 | static const int kCodeTargetMask = (1 << (LAST_CODE_ENUM + 1)) - 1; |
| 272 | static const int kPositionMask = 1 << POSITION | 1 << STATEMENT_POSITION; |
| 273 | static const int kDebugMask = kPositionMask | 1 << COMMENT; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 274 | static const int kApplyMask; // Modes affected by apply. Depends on arch. |
| 275 | |
| 276 | private: |
| 277 | // On ARM, note that pc_ is the address of the constant pool entry |
| 278 | // to be relocated and not the address of the instruction |
| 279 | // referencing the constant pool entry (except when rmode_ == |
| 280 | // comment). |
| 281 | byte* pc_; |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 282 | Mode rmode_; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 283 | intptr_t data_; |
| 284 | friend class RelocIterator; |
| 285 | }; |
| 286 | |
| 287 | |
| 288 | // RelocInfoWriter serializes a stream of relocation info. It writes towards |
| 289 | // lower addresses. |
| 290 | class RelocInfoWriter BASE_EMBEDDED { |
| 291 | public: |
| 292 | RelocInfoWriter() : pos_(NULL), last_pc_(NULL), last_data_(0) {} |
| 293 | RelocInfoWriter(byte* pos, byte* pc) : pos_(pos), last_pc_(pc), |
| 294 | last_data_(0) {} |
| 295 | |
| 296 | byte* pos() const { return pos_; } |
| 297 | byte* last_pc() const { return last_pc_; } |
| 298 | |
| 299 | void Write(const RelocInfo* rinfo); |
| 300 | |
| 301 | // Update the state of the stream after reloc info buffer |
| 302 | // and/or code is moved while the stream is active. |
| 303 | void Reposition(byte* pos, byte* pc) { |
| 304 | pos_ = pos; |
| 305 | last_pc_ = pc; |
| 306 | } |
| 307 | |
| 308 | // Max size (bytes) of a written RelocInfo. |
| 309 | static const int kMaxSize = 12; |
| 310 | |
| 311 | private: |
| 312 | inline uint32_t WriteVariableLengthPCJump(uint32_t pc_delta); |
| 313 | inline void WriteTaggedPC(uint32_t pc_delta, int tag); |
| 314 | inline void WriteExtraTaggedPC(uint32_t pc_delta, int extra_tag); |
| 315 | inline void WriteExtraTaggedData(int32_t data_delta, int top_tag); |
| 316 | inline void WriteTaggedData(int32_t data_delta, int tag); |
| 317 | inline void WriteExtraTag(int extra_tag, int top_tag); |
| 318 | |
| 319 | byte* pos_; |
| 320 | byte* last_pc_; |
| 321 | intptr_t last_data_; |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 322 | DISALLOW_COPY_AND_ASSIGN(RelocInfoWriter); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 323 | }; |
| 324 | |
| 325 | |
| 326 | // A RelocIterator iterates over relocation information. |
| 327 | // Typical use: |
| 328 | // |
| 329 | // for (RelocIterator it(code); !it.done(); it.next()) { |
| 330 | // // do something with it.rinfo() here |
| 331 | // } |
| 332 | // |
| 333 | // A mask can be specified to skip unwanted modes. |
| 334 | class RelocIterator: public Malloced { |
| 335 | public: |
| 336 | // Create a new iterator positioned at |
| 337 | // the beginning of the reloc info. |
| 338 | // Relocation information with mode k is included in the |
| 339 | // iteration iff bit k of mode_mask is set. |
| 340 | explicit RelocIterator(Code* code, int mode_mask = -1); |
| 341 | explicit RelocIterator(const CodeDesc& desc, int mode_mask = -1); |
| 342 | |
| 343 | // Iteration |
| 344 | bool done() const { return done_; } |
| 345 | void next(); |
| 346 | |
| 347 | // Return pointer valid until next next(). |
| 348 | RelocInfo* rinfo() { |
| 349 | ASSERT(!done()); |
| 350 | return &rinfo_; |
| 351 | } |
| 352 | |
| 353 | private: |
| 354 | // Advance* moves the position before/after reading. |
| 355 | // *Read* reads from current byte(s) into rinfo_. |
| 356 | // *Get* just reads and returns info on current byte. |
| 357 | void Advance(int bytes = 1) { pos_ -= bytes; } |
| 358 | int AdvanceGetTag(); |
| 359 | int GetExtraTag(); |
| 360 | int GetTopTag(); |
| 361 | void ReadTaggedPC(); |
| 362 | void AdvanceReadPC(); |
| 363 | void AdvanceReadData(); |
| 364 | void AdvanceReadVariableLengthPCJump(); |
| 365 | int GetPositionTypeTag(); |
| 366 | void ReadTaggedData(); |
| 367 | |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 368 | static RelocInfo::Mode DebugInfoModeFromTag(int tag); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 369 | |
| 370 | // If the given mode is wanted, set it in rinfo_ and return true. |
| 371 | // Else return false. Used for efficiently skipping unwanted modes. |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 372 | bool SetMode(RelocInfo::Mode mode) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 373 | return (mode_mask_ & 1 << mode) ? (rinfo_.rmode_ = mode, true) : false; |
| 374 | } |
| 375 | |
| 376 | byte* pos_; |
| 377 | byte* end_; |
| 378 | RelocInfo rinfo_; |
| 379 | bool done_; |
| 380 | int mode_mask_; |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 381 | DISALLOW_COPY_AND_ASSIGN(RelocIterator); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 382 | }; |
| 383 | |
| 384 | |
| 385 | //------------------------------------------------------------------------------ |
| 386 | // External function |
| 387 | |
| 388 | //---------------------------------------------------------------------------- |
| 389 | class IC_Utility; |
| 390 | class Debug_Address; |
| 391 | class SCTableReference; |
| 392 | |
| 393 | // An ExternalReference represents a C++ address called from the generated |
| 394 | // code. All references to C++ functions and must be encapsulated in an |
| 395 | // ExternalReference instance. This is done in order to track the origin of |
| 396 | // all external references in the code. |
| 397 | class ExternalReference BASE_EMBEDDED { |
| 398 | public: |
| 399 | explicit ExternalReference(Builtins::CFunctionId id); |
| 400 | |
| 401 | explicit ExternalReference(Builtins::Name name); |
| 402 | |
| 403 | explicit ExternalReference(Runtime::FunctionId id); |
| 404 | |
| 405 | explicit ExternalReference(Runtime::Function* f); |
| 406 | |
| 407 | explicit ExternalReference(const IC_Utility& ic_utility); |
| 408 | |
| 409 | explicit ExternalReference(const Debug_Address& debug_address); |
| 410 | |
| 411 | explicit ExternalReference(StatsCounter* counter); |
| 412 | |
| 413 | explicit ExternalReference(Top::AddressId id); |
| 414 | |
| 415 | explicit ExternalReference(const SCTableReference& table_ref); |
| 416 | |
| 417 | // One-of-a-kind references. These references are not part of a general |
| 418 | // pattern. This means that they have to be added to the |
| 419 | // ExternalReferenceTable in serialize.cc manually. |
| 420 | |
| 421 | static ExternalReference builtin_passed_function(); |
| 422 | |
| 423 | // Static variable Factory::the_hole_value.location() |
| 424 | static ExternalReference the_hole_value_location(); |
| 425 | |
| 426 | // Static variable StackGuard::address_of_limit() |
| 427 | static ExternalReference address_of_stack_guard_limit(); |
| 428 | |
| 429 | // Function Debug::Break() |
| 430 | static ExternalReference debug_break(); |
| 431 | |
| 432 | // Static variable Heap::NewSpaceStart() |
| 433 | static ExternalReference new_space_start(); |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 434 | static ExternalReference heap_always_allocate_scope_depth(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 435 | |
| 436 | // Used for fast allocation in generated code. |
| 437 | static ExternalReference new_space_allocation_top_address(); |
| 438 | static ExternalReference new_space_allocation_limit_address(); |
| 439 | |
| 440 | // Used to check if single stepping is enabled in generated code. |
| 441 | static ExternalReference debug_step_in_fp_address(); |
| 442 | |
| 443 | Address address() const {return address_;} |
| 444 | |
| 445 | private: |
| 446 | explicit ExternalReference(void* address) |
| 447 | : address_(reinterpret_cast<Address>(address)) {} |
| 448 | |
| 449 | Address address_; |
| 450 | }; |
| 451 | |
| 452 | |
| 453 | // ----------------------------------------------------------------------------- |
| 454 | // Utility functions |
| 455 | |
| 456 | // Move these into inline file? |
| 457 | |
| 458 | static inline bool is_intn(int x, int n) { |
| 459 | return -(1 << (n-1)) <= x && x < (1 << (n-1)); |
| 460 | } |
| 461 | |
| 462 | static inline bool is_int24(int x) { return is_intn(x, 24); } |
| 463 | static inline bool is_int8(int x) { return is_intn(x, 8); } |
| 464 | |
| 465 | static inline bool is_uintn(int x, int n) { |
| 466 | return (x & -(1 << n)) == 0; |
| 467 | } |
| 468 | |
| 469 | static inline bool is_uint3(int x) { return is_uintn(x, 3); } |
| 470 | static inline bool is_uint4(int x) { return is_uintn(x, 4); } |
| 471 | static inline bool is_uint5(int x) { return is_uintn(x, 5); } |
| 472 | static inline bool is_uint8(int x) { return is_uintn(x, 8); } |
| 473 | static inline bool is_uint12(int x) { return is_uintn(x, 12); } |
| 474 | static inline bool is_uint16(int x) { return is_uintn(x, 16); } |
| 475 | static inline bool is_uint24(int x) { return is_uintn(x, 24); } |
| 476 | |
| 477 | } } // namespace v8::internal |
| 478 | |
| 479 | #endif // V8_ASSEMBLER_H_ |