Wed, 22 Jan 2014 17:42:23 -0800
Merge
duke@435 | 1 | /* |
mikael@6198 | 2 | * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
trims@1907 | 21 | * questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
stefank@2314 | 25 | #ifndef SHARE_VM_ASM_ASSEMBLER_HPP |
stefank@2314 | 26 | #define SHARE_VM_ASM_ASSEMBLER_HPP |
stefank@2314 | 27 | |
twisti@4318 | 28 | #include "asm/codeBuffer.hpp" |
stefank@2314 | 29 | #include "code/oopRecorder.hpp" |
stefank@2314 | 30 | #include "code/relocInfo.hpp" |
stefank@2314 | 31 | #include "memory/allocation.hpp" |
stefank@2314 | 32 | #include "utilities/debug.hpp" |
stefank@2314 | 33 | #include "utilities/growableArray.hpp" |
stefank@2314 | 34 | #include "utilities/top.hpp" |
twisti@4318 | 35 | |
stefank@2314 | 36 | #ifdef TARGET_ARCH_x86 |
stefank@2314 | 37 | # include "register_x86.hpp" |
stefank@2314 | 38 | # include "vm_version_x86.hpp" |
stefank@2314 | 39 | #endif |
stefank@2314 | 40 | #ifdef TARGET_ARCH_sparc |
stefank@2314 | 41 | # include "register_sparc.hpp" |
stefank@2314 | 42 | # include "vm_version_sparc.hpp" |
stefank@2314 | 43 | #endif |
stefank@2314 | 44 | #ifdef TARGET_ARCH_zero |
stefank@2314 | 45 | # include "register_zero.hpp" |
stefank@2314 | 46 | # include "vm_version_zero.hpp" |
stefank@2314 | 47 | #endif |
bobv@2508 | 48 | #ifdef TARGET_ARCH_arm |
bobv@2508 | 49 | # include "register_arm.hpp" |
bobv@2508 | 50 | # include "vm_version_arm.hpp" |
bobv@2508 | 51 | #endif |
bobv@2508 | 52 | #ifdef TARGET_ARCH_ppc |
bobv@2508 | 53 | # include "register_ppc.hpp" |
bobv@2508 | 54 | # include "vm_version_ppc.hpp" |
bobv@2508 | 55 | #endif |
stefank@2314 | 56 | |
twisti@1040 | 57 | // This file contains platform-independent assembler declarations. |
duke@435 | 58 | |
duke@435 | 59 | class MacroAssembler; |
duke@435 | 60 | class AbstractAssembler; |
duke@435 | 61 | class Label; |
duke@435 | 62 | |
duke@435 | 63 | /** |
duke@435 | 64 | * Labels represent destinations for control transfer instructions. Such |
duke@435 | 65 | * instructions can accept a Label as their target argument. A Label is |
duke@435 | 66 | * bound to the current location in the code stream by calling the |
duke@435 | 67 | * MacroAssembler's 'bind' method, which in turn calls the Label's 'bind' |
duke@435 | 68 | * method. A Label may be referenced by an instruction before it's bound |
duke@435 | 69 | * (i.e., 'forward referenced'). 'bind' stores the current code offset |
duke@435 | 70 | * in the Label object. |
duke@435 | 71 | * |
duke@435 | 72 | * If an instruction references a bound Label, the offset field(s) within |
duke@435 | 73 | * the instruction are immediately filled in based on the Label's code |
duke@435 | 74 | * offset. If an instruction references an unbound label, that |
duke@435 | 75 | * instruction is put on a list of instructions that must be patched |
duke@435 | 76 | * (i.e., 'resolved') when the Label is bound. |
duke@435 | 77 | * |
duke@435 | 78 | * 'bind' will call the platform-specific 'patch_instruction' method to |
duke@435 | 79 | * fill in the offset field(s) for each unresolved instruction (if there |
duke@435 | 80 | * are any). 'patch_instruction' lives in one of the |
duke@435 | 81 | * cpu/<arch>/vm/assembler_<arch>* files. |
duke@435 | 82 | * |
duke@435 | 83 | * Instead of using a linked list of unresolved instructions, a Label has |
duke@435 | 84 | * an array of unresolved instruction code offsets. _patch_index |
duke@435 | 85 | * contains the total number of forward references. If the Label's array |
duke@435 | 86 | * overflows (i.e., _patch_index grows larger than the array size), a |
duke@435 | 87 | * GrowableArray is allocated to hold the remaining offsets. (The cache |
duke@435 | 88 | * size is 4 for now, which handles over 99.5% of the cases) |
duke@435 | 89 | * |
duke@435 | 90 | * Labels may only be used within a single CodeSection. If you need |
duke@435 | 91 | * to create references between code sections, use explicit relocations. |
duke@435 | 92 | */ |
duke@435 | 93 | class Label VALUE_OBJ_CLASS_SPEC { |
duke@435 | 94 | private: |
duke@435 | 95 | enum { PatchCacheSize = 4 }; |
duke@435 | 96 | |
duke@435 | 97 | // _loc encodes both the binding state (via its sign) |
duke@435 | 98 | // and the binding locator (via its value) of a label. |
duke@435 | 99 | // |
duke@435 | 100 | // _loc >= 0 bound label, loc() encodes the target (jump) position |
duke@435 | 101 | // _loc == -1 unbound label |
duke@435 | 102 | int _loc; |
duke@435 | 103 | |
duke@435 | 104 | // References to instructions that jump to this unresolved label. |
duke@435 | 105 | // These instructions need to be patched when the label is bound |
duke@435 | 106 | // using the platform-specific patchInstruction() method. |
duke@435 | 107 | // |
duke@435 | 108 | // To avoid having to allocate from the C-heap each time, we provide |
duke@435 | 109 | // a local cache and use the overflow only if we exceed the local cache |
duke@435 | 110 | int _patches[PatchCacheSize]; |
duke@435 | 111 | int _patch_index; |
duke@435 | 112 | GrowableArray<int>* _patch_overflow; |
duke@435 | 113 | |
duke@435 | 114 | Label(const Label&) { ShouldNotReachHere(); } |
duke@435 | 115 | |
duke@435 | 116 | public: |
duke@435 | 117 | |
duke@435 | 118 | /** |
duke@435 | 119 | * After binding, be sure 'patch_instructions' is called later to link |
duke@435 | 120 | */ |
duke@435 | 121 | void bind_loc(int loc) { |
duke@435 | 122 | assert(loc >= 0, "illegal locator"); |
duke@435 | 123 | assert(_loc == -1, "already bound"); |
duke@435 | 124 | _loc = loc; |
duke@435 | 125 | } |
twisti@4318 | 126 | void bind_loc(int pos, int sect) { bind_loc(CodeBuffer::locator(pos, sect)); } |
duke@435 | 127 | |
duke@435 | 128 | #ifndef PRODUCT |
duke@435 | 129 | // Iterates over all unresolved instructions for printing |
duke@435 | 130 | void print_instructions(MacroAssembler* masm) const; |
duke@435 | 131 | #endif // PRODUCT |
duke@435 | 132 | |
duke@435 | 133 | /** |
duke@435 | 134 | * Returns the position of the the Label in the code buffer |
duke@435 | 135 | * The position is a 'locator', which encodes both offset and section. |
duke@435 | 136 | */ |
duke@435 | 137 | int loc() const { |
duke@435 | 138 | assert(_loc >= 0, "unbound label"); |
duke@435 | 139 | return _loc; |
duke@435 | 140 | } |
twisti@4318 | 141 | int loc_pos() const { return CodeBuffer::locator_pos(loc()); } |
twisti@4318 | 142 | int loc_sect() const { return CodeBuffer::locator_sect(loc()); } |
duke@435 | 143 | |
duke@435 | 144 | bool is_bound() const { return _loc >= 0; } |
duke@435 | 145 | bool is_unbound() const { return _loc == -1 && _patch_index > 0; } |
duke@435 | 146 | bool is_unused() const { return _loc == -1 && _patch_index == 0; } |
duke@435 | 147 | |
duke@435 | 148 | /** |
duke@435 | 149 | * Adds a reference to an unresolved displacement instruction to |
duke@435 | 150 | * this unbound label |
duke@435 | 151 | * |
duke@435 | 152 | * @param cb the code buffer being patched |
duke@435 | 153 | * @param branch_loc the locator of the branch instruction in the code buffer |
duke@435 | 154 | */ |
duke@435 | 155 | void add_patch_at(CodeBuffer* cb, int branch_loc); |
duke@435 | 156 | |
duke@435 | 157 | /** |
duke@435 | 158 | * Iterate over the list of patches, resolving the instructions |
duke@435 | 159 | * Call patch_instruction on each 'branch_loc' value |
duke@435 | 160 | */ |
duke@435 | 161 | void patch_instructions(MacroAssembler* masm); |
duke@435 | 162 | |
duke@435 | 163 | void init() { |
duke@435 | 164 | _loc = -1; |
duke@435 | 165 | _patch_index = 0; |
duke@435 | 166 | _patch_overflow = NULL; |
duke@435 | 167 | } |
duke@435 | 168 | |
duke@435 | 169 | Label() { |
duke@435 | 170 | init(); |
duke@435 | 171 | } |
duke@435 | 172 | }; |
duke@435 | 173 | |
jrose@1057 | 174 | // A union type for code which has to assemble both constant and |
jrose@1057 | 175 | // non-constant operands, when the distinction cannot be made |
jrose@1057 | 176 | // statically. |
jrose@1100 | 177 | class RegisterOrConstant VALUE_OBJ_CLASS_SPEC { |
jrose@1057 | 178 | private: |
jrose@1057 | 179 | Register _r; |
jrose@1057 | 180 | intptr_t _c; |
jrose@1057 | 181 | |
jrose@1057 | 182 | public: |
jrose@1100 | 183 | RegisterOrConstant(): _r(noreg), _c(0) {} |
jrose@1100 | 184 | RegisterOrConstant(Register r): _r(r), _c(0) {} |
jrose@1100 | 185 | RegisterOrConstant(intptr_t c): _r(noreg), _c(c) {} |
jrose@1057 | 186 | |
jrose@1057 | 187 | Register as_register() const { assert(is_register(),""); return _r; } |
jrose@1057 | 188 | intptr_t as_constant() const { assert(is_constant(),""); return _c; } |
jrose@1057 | 189 | |
jrose@1057 | 190 | Register register_or_noreg() const { return _r; } |
jrose@1057 | 191 | intptr_t constant_or_zero() const { return _c; } |
jrose@1057 | 192 | |
jrose@1057 | 193 | bool is_register() const { return _r != noreg; } |
jrose@1057 | 194 | bool is_constant() const { return _r == noreg; } |
jrose@1057 | 195 | }; |
duke@435 | 196 | |
duke@435 | 197 | // The Abstract Assembler: Pure assembler doing NO optimizations on the |
duke@435 | 198 | // instruction level; i.e., what you write is what you get. |
duke@435 | 199 | // The Assembler is generating code into a CodeBuffer. |
duke@435 | 200 | class AbstractAssembler : public ResourceObj { |
duke@435 | 201 | friend class Label; |
duke@435 | 202 | |
duke@435 | 203 | protected: |
duke@435 | 204 | CodeSection* _code_section; // section within the code buffer |
duke@435 | 205 | OopRecorder* _oop_recorder; // support for relocInfo::oop_type |
duke@435 | 206 | |
goetz@6487 | 207 | public: |
duke@435 | 208 | // Code emission & accessing |
twisti@4318 | 209 | address addr_at(int pos) const { return code_section()->start() + pos; } |
twisti@4318 | 210 | |
goetz@6487 | 211 | protected: |
duke@435 | 212 | // This routine is called with a label is used for an address. |
duke@435 | 213 | // Labels and displacements truck in offsets, but target must return a PC. |
twisti@4318 | 214 | address target(Label& L) { return code_section()->target(L, pc()); } |
duke@435 | 215 | |
duke@435 | 216 | bool is8bit(int x) const { return -0x80 <= x && x < 0x80; } |
duke@435 | 217 | bool isByte(int x) const { return 0 <= x && x < 0x100; } |
duke@435 | 218 | bool isShiftCount(int x) const { return 0 <= x && x < 32; } |
duke@435 | 219 | |
duke@435 | 220 | // Instruction boundaries (required when emitting relocatable values). |
duke@435 | 221 | class InstructionMark: public StackObj { |
duke@435 | 222 | private: |
duke@435 | 223 | AbstractAssembler* _assm; |
duke@435 | 224 | |
duke@435 | 225 | public: |
duke@435 | 226 | InstructionMark(AbstractAssembler* assm) : _assm(assm) { |
duke@435 | 227 | assert(assm->inst_mark() == NULL, "overlapping instructions"); |
duke@435 | 228 | _assm->set_inst_mark(); |
duke@435 | 229 | } |
duke@435 | 230 | ~InstructionMark() { |
duke@435 | 231 | _assm->clear_inst_mark(); |
duke@435 | 232 | } |
duke@435 | 233 | }; |
duke@435 | 234 | friend class InstructionMark; |
twisti@4318 | 235 | #ifdef ASSERT |
duke@435 | 236 | // Make it return true on platforms which need to verify |
duke@435 | 237 | // instruction boundaries for some operations. |
twisti@4323 | 238 | static bool pd_check_instruction_mark(); |
kvn@3395 | 239 | |
kvn@3395 | 240 | // Add delta to short branch distance to verify that it still fit into imm8. |
kvn@3395 | 241 | int _short_branch_delta; |
kvn@3395 | 242 | |
kvn@3395 | 243 | int short_branch_delta() const { return _short_branch_delta; } |
kvn@3395 | 244 | void set_short_branch_delta() { _short_branch_delta = 32; } |
kvn@3395 | 245 | void clear_short_branch_delta() { _short_branch_delta = 0; } |
kvn@3395 | 246 | |
kvn@3395 | 247 | class ShortBranchVerifier: public StackObj { |
kvn@3395 | 248 | private: |
kvn@3395 | 249 | AbstractAssembler* _assm; |
kvn@3395 | 250 | |
kvn@3395 | 251 | public: |
kvn@3395 | 252 | ShortBranchVerifier(AbstractAssembler* assm) : _assm(assm) { |
kvn@3395 | 253 | assert(assm->short_branch_delta() == 0, "overlapping instructions"); |
kvn@3395 | 254 | _assm->set_short_branch_delta(); |
kvn@3395 | 255 | } |
kvn@3395 | 256 | ~ShortBranchVerifier() { |
kvn@3395 | 257 | _assm->clear_short_branch_delta(); |
kvn@3395 | 258 | } |
kvn@3395 | 259 | }; |
twisti@4318 | 260 | #else |
kvn@3395 | 261 | // Dummy in product. |
kvn@3395 | 262 | class ShortBranchVerifier: public StackObj { |
kvn@3395 | 263 | public: |
kvn@3395 | 264 | ShortBranchVerifier(AbstractAssembler* assm) {} |
kvn@3395 | 265 | }; |
twisti@4318 | 266 | #endif |
duke@435 | 267 | |
duke@435 | 268 | public: |
duke@435 | 269 | |
duke@435 | 270 | // Creation |
duke@435 | 271 | AbstractAssembler(CodeBuffer* code); |
duke@435 | 272 | |
duke@435 | 273 | // ensure buf contains all code (call this before using/copying the code) |
duke@435 | 274 | void flush(); |
duke@435 | 275 | |
twisti@4366 | 276 | void emit_int8( int8_t x) { code_section()->emit_int8( x); } |
twisti@4366 | 277 | void emit_int16( int16_t x) { code_section()->emit_int16( x); } |
twisti@4366 | 278 | void emit_int32( int32_t x) { code_section()->emit_int32( x); } |
twisti@4366 | 279 | void emit_int64( int64_t x) { code_section()->emit_int64( x); } |
twisti@4366 | 280 | |
twisti@4366 | 281 | void emit_float( jfloat x) { code_section()->emit_float( x); } |
twisti@4366 | 282 | void emit_double( jdouble x) { code_section()->emit_double( x); } |
twisti@4366 | 283 | void emit_address(address x) { code_section()->emit_address(x); } |
twisti@4366 | 284 | |
twisti@3310 | 285 | // min and max values for signed immediate ranges |
twisti@3310 | 286 | static int min_simm(int nbits) { return -(intptr_t(1) << (nbits - 1)) ; } |
twisti@3310 | 287 | static int max_simm(int nbits) { return (intptr_t(1) << (nbits - 1)) - 1; } |
twisti@3310 | 288 | |
twisti@3310 | 289 | // Define some: |
twisti@3310 | 290 | static int min_simm10() { return min_simm(10); } |
twisti@3310 | 291 | static int min_simm13() { return min_simm(13); } |
twisti@3310 | 292 | static int min_simm16() { return min_simm(16); } |
twisti@3310 | 293 | |
twisti@3310 | 294 | // Test if x is within signed immediate range for nbits |
twisti@3310 | 295 | static bool is_simm(intptr_t x, int nbits) { return min_simm(nbits) <= x && x <= max_simm(nbits); } |
twisti@3310 | 296 | |
twisti@3310 | 297 | // Define some: |
twisti@3310 | 298 | static bool is_simm5( intptr_t x) { return is_simm(x, 5 ); } |
twisti@3310 | 299 | static bool is_simm8( intptr_t x) { return is_simm(x, 8 ); } |
twisti@3310 | 300 | static bool is_simm10(intptr_t x) { return is_simm(x, 10); } |
twisti@3310 | 301 | static bool is_simm11(intptr_t x) { return is_simm(x, 11); } |
twisti@3310 | 302 | static bool is_simm12(intptr_t x) { return is_simm(x, 12); } |
twisti@3310 | 303 | static bool is_simm13(intptr_t x) { return is_simm(x, 13); } |
twisti@3310 | 304 | static bool is_simm16(intptr_t x) { return is_simm(x, 16); } |
twisti@3310 | 305 | static bool is_simm26(intptr_t x) { return is_simm(x, 26); } |
twisti@3310 | 306 | static bool is_simm32(intptr_t x) { return is_simm(x, 32); } |
twisti@3310 | 307 | |
duke@435 | 308 | // Accessors |
duke@435 | 309 | CodeSection* code_section() const { return _code_section; } |
twisti@4318 | 310 | CodeBuffer* code() const { return code_section()->outer(); } |
twisti@4318 | 311 | int sect() const { return code_section()->index(); } |
twisti@4318 | 312 | address pc() const { return code_section()->end(); } |
twisti@4318 | 313 | int offset() const { return code_section()->size(); } |
twisti@4318 | 314 | int locator() const { return CodeBuffer::locator(offset(), sect()); } |
twisti@4317 | 315 | |
duke@435 | 316 | OopRecorder* oop_recorder() const { return _oop_recorder; } |
duke@435 | 317 | void set_oop_recorder(OopRecorder* r) { _oop_recorder = r; } |
duke@435 | 318 | |
twisti@4318 | 319 | address inst_mark() const { return code_section()->mark(); } |
twisti@4318 | 320 | void set_inst_mark() { code_section()->set_mark(); } |
twisti@4318 | 321 | void clear_inst_mark() { code_section()->clear_mark(); } |
duke@435 | 322 | |
duke@435 | 323 | // Constants in code |
twisti@4318 | 324 | void relocate(RelocationHolder const& rspec, int format = 0) { |
twisti@4318 | 325 | assert(!pd_check_instruction_mark() |
twisti@4318 | 326 | || inst_mark() == NULL || inst_mark() == code_section()->end(), |
twisti@4318 | 327 | "call relocate() between instructions"); |
twisti@4318 | 328 | code_section()->relocate(code_section()->end(), rspec, format); |
twisti@4318 | 329 | } |
duke@435 | 330 | void relocate( relocInfo::relocType rtype, int format = 0) { |
twisti@4318 | 331 | code_section()->relocate(code_section()->end(), rtype, format); |
duke@435 | 332 | } |
duke@435 | 333 | |
duke@435 | 334 | static int code_fill_byte(); // used to pad out odd-sized code buffers |
duke@435 | 335 | |
duke@435 | 336 | // Associate a comment with the current offset. It will be printed |
duke@435 | 337 | // along with the disassembly when printing nmethods. Currently |
duke@435 | 338 | // only supported in the instruction section of the code buffer. |
duke@435 | 339 | void block_comment(const char* comment); |
roland@4767 | 340 | // Copy str to a buffer that has the same lifetime as the CodeBuffer |
roland@4767 | 341 | const char* code_string(const char* str); |
duke@435 | 342 | |
duke@435 | 343 | // Label functions |
duke@435 | 344 | void bind(Label& L); // binds an unbound label L to the current code position |
duke@435 | 345 | |
duke@435 | 346 | // Move to a different section in the same code buffer. |
duke@435 | 347 | void set_code_section(CodeSection* cs); |
duke@435 | 348 | |
duke@435 | 349 | // Inform assembler when generating stub code and relocation info |
duke@435 | 350 | address start_a_stub(int required_space); |
duke@435 | 351 | void end_a_stub(); |
duke@435 | 352 | // Ditto for constants. |
duke@435 | 353 | address start_a_const(int required_space, int required_align = sizeof(double)); |
kvn@4316 | 354 | void end_a_const(CodeSection* cs); // Pass the codesection to continue in (insts or stubs?). |
duke@435 | 355 | |
twisti@2350 | 356 | // constants support |
kvn@4316 | 357 | // |
kvn@4316 | 358 | // We must remember the code section (insts or stubs) in c1 |
kvn@4316 | 359 | // so we can reset to the proper section in end_a_const(). |
twisti@2350 | 360 | address long_constant(jlong c) { |
kvn@4316 | 361 | CodeSection* c1 = _code_section; |
twisti@2350 | 362 | address ptr = start_a_const(sizeof(c), sizeof(c)); |
twisti@2350 | 363 | if (ptr != NULL) { |
twisti@4317 | 364 | emit_int64(c); |
kvn@4316 | 365 | end_a_const(c1); |
twisti@2350 | 366 | } |
twisti@2350 | 367 | return ptr; |
twisti@2350 | 368 | } |
duke@435 | 369 | address double_constant(jdouble c) { |
kvn@4316 | 370 | CodeSection* c1 = _code_section; |
duke@435 | 371 | address ptr = start_a_const(sizeof(c), sizeof(c)); |
duke@435 | 372 | if (ptr != NULL) { |
twisti@4317 | 373 | emit_double(c); |
kvn@4316 | 374 | end_a_const(c1); |
duke@435 | 375 | } |
duke@435 | 376 | return ptr; |
duke@435 | 377 | } |
duke@435 | 378 | address float_constant(jfloat c) { |
kvn@4316 | 379 | CodeSection* c1 = _code_section; |
duke@435 | 380 | address ptr = start_a_const(sizeof(c), sizeof(c)); |
duke@435 | 381 | if (ptr != NULL) { |
twisti@4317 | 382 | emit_float(c); |
kvn@4316 | 383 | end_a_const(c1); |
duke@435 | 384 | } |
duke@435 | 385 | return ptr; |
duke@435 | 386 | } |
twisti@2350 | 387 | address address_constant(address c) { |
kvn@4316 | 388 | CodeSection* c1 = _code_section; |
twisti@2350 | 389 | address ptr = start_a_const(sizeof(c), sizeof(c)); |
twisti@2350 | 390 | if (ptr != NULL) { |
twisti@4317 | 391 | emit_address(c); |
kvn@4316 | 392 | end_a_const(c1); |
twisti@2350 | 393 | } |
twisti@2350 | 394 | return ptr; |
twisti@2350 | 395 | } |
duke@435 | 396 | address address_constant(address c, RelocationHolder const& rspec) { |
kvn@4316 | 397 | CodeSection* c1 = _code_section; |
duke@435 | 398 | address ptr = start_a_const(sizeof(c), sizeof(c)); |
duke@435 | 399 | if (ptr != NULL) { |
duke@435 | 400 | relocate(rspec); |
twisti@4317 | 401 | emit_address(c); |
kvn@4316 | 402 | end_a_const(c1); |
duke@435 | 403 | } |
duke@435 | 404 | return ptr; |
duke@435 | 405 | } |
duke@435 | 406 | |
jrose@1057 | 407 | // Bootstrapping aid to cope with delayed determination of constants. |
jrose@1057 | 408 | // Returns a static address which will eventually contain the constant. |
jrose@1057 | 409 | // The value zero (NULL) stands instead of a constant which is still uncomputed. |
jrose@1057 | 410 | // Thus, the eventual value of the constant must not be zero. |
jrose@1057 | 411 | // This is fine, since this is designed for embedding object field |
jrose@1057 | 412 | // offsets in code which must be generated before the object class is loaded. |
jrose@1057 | 413 | // Field offsets are never zero, since an object's header (mark word) |
jrose@1057 | 414 | // is located at offset zero. |
twisti@3969 | 415 | RegisterOrConstant delayed_value(int(*value_fn)(), Register tmp, int offset = 0); |
twisti@3969 | 416 | RegisterOrConstant delayed_value(address(*value_fn)(), Register tmp, int offset = 0); |
jrose@1100 | 417 | virtual RegisterOrConstant delayed_value_impl(intptr_t* delayed_value_addr, Register tmp, int offset) = 0; |
jrose@1057 | 418 | // Last overloading is platform-dependent; look in assembler_<arch>.cpp. |
jrose@1057 | 419 | static intptr_t* delayed_value_addr(int(*constant_fn)()); |
jrose@1057 | 420 | static intptr_t* delayed_value_addr(address(*constant_fn)()); |
jrose@1057 | 421 | static void update_delayed_values(); |
jrose@1057 | 422 | |
duke@435 | 423 | // Bang stack to trigger StackOverflowError at a safe location |
duke@435 | 424 | // implementation delegates to machine-specific bang_stack_with_offset |
duke@435 | 425 | void generate_stack_overflow_check( int frame_size_in_bytes ); |
duke@435 | 426 | virtual void bang_stack_with_offset(int offset) = 0; |
duke@435 | 427 | |
duke@435 | 428 | |
duke@435 | 429 | /** |
duke@435 | 430 | * A platform-dependent method to patch a jump instruction that refers |
duke@435 | 431 | * to this label. |
duke@435 | 432 | * |
duke@435 | 433 | * @param branch the location of the instruction to patch |
duke@435 | 434 | * @param masm the assembler which generated the branch |
duke@435 | 435 | */ |
duke@435 | 436 | void pd_patch_instruction(address branch, address target); |
duke@435 | 437 | |
duke@435 | 438 | }; |
duke@435 | 439 | |
stefank@2314 | 440 | #ifdef TARGET_ARCH_x86 |
stefank@2314 | 441 | # include "assembler_x86.hpp" |
stefank@2314 | 442 | #endif |
stefank@2314 | 443 | #ifdef TARGET_ARCH_sparc |
stefank@2314 | 444 | # include "assembler_sparc.hpp" |
stefank@2314 | 445 | #endif |
stefank@2314 | 446 | #ifdef TARGET_ARCH_zero |
stefank@2314 | 447 | # include "assembler_zero.hpp" |
stefank@2314 | 448 | #endif |
bobv@2508 | 449 | #ifdef TARGET_ARCH_arm |
bobv@2508 | 450 | # include "assembler_arm.hpp" |
bobv@2508 | 451 | #endif |
bobv@2508 | 452 | #ifdef TARGET_ARCH_ppc |
bobv@2508 | 453 | # include "assembler_ppc.hpp" |
bobv@2508 | 454 | #endif |
stefank@2314 | 455 | |
stefank@2314 | 456 | |
stefank@2314 | 457 | #endif // SHARE_VM_ASM_ASSEMBLER_HPP |