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comparison src/cpu/sparc/vm/nativeInst_sparc.hpp @ 0:a61af66fc99e jdk7-b24

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1 /*
2 * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 // We have interface for the following instructions:
26 // - NativeInstruction
27 // - - NativeCall
28 // - - NativeFarCall
29 // - - NativeMovConstReg
30 // - - NativeMovConstRegPatching
31 // - - NativeMovRegMem
32 // - - NativeMovRegMemPatching
33 // - - NativeJump
34 // - - NativeGeneralJump
35 // - - NativeIllegalInstruction
36 // The base class for different kinds of native instruction abstractions.
37 // Provides the primitive operations to manipulate code relative to this.
38 class NativeInstruction VALUE_OBJ_CLASS_SPEC {
39 friend class Relocation;
40
41 public:
42 enum Sparc_specific_constants {
43 nop_instruction_size = 4
44 };
45
46 bool is_nop() { return long_at(0) == nop_instruction(); }
47 bool is_call() { return is_op(long_at(0), Assembler::call_op); }
48 bool is_sethi() { return (is_op2(long_at(0), Assembler::sethi_op2)
49 && inv_rd(long_at(0)) != G0); }
50
51 bool sets_cc() {
52 // conservative (returns true for some instructions that do not set the
53 // the condition code, such as, "save".
54 // Does not return true for the deprecated tagged instructions, such as, TADDcc
55 int x = long_at(0);
56 return (is_op(x, Assembler::arith_op) &&
57 (inv_op3(x) & Assembler::cc_bit_op3) == Assembler::cc_bit_op3);
58 }
59 bool is_illegal();
60 bool is_zombie() {
61 int x = long_at(0);
62 return is_op3(x,
63 VM_Version::v9_instructions_work() ?
64 Assembler::ldsw_op3 : Assembler::lduw_op3,
65 Assembler::ldst_op)
66 && Assembler::inv_rs1(x) == G0
67 && Assembler::inv_rd(x) == O7;
68 }
69 bool is_ic_miss_trap(); // Inline-cache uses a trap to detect a miss
70 bool is_return() {
71 // is it the output of MacroAssembler::ret or MacroAssembler::retl?
72 int x = long_at(0);
73 const int pc_return_offset = 8; // see frame_sparc.hpp
74 return is_op3(x, Assembler::jmpl_op3, Assembler::arith_op)
75 && (inv_rs1(x) == I7 || inv_rs1(x) == O7)
76 && inv_immed(x) && inv_simm(x, 13) == pc_return_offset
77 && inv_rd(x) == G0;
78 }
79 bool is_int_jump() {
80 // is it the output of MacroAssembler::b?
81 int x = long_at(0);
82 return is_op2(x, Assembler::bp_op2) || is_op2(x, Assembler::br_op2);
83 }
84 bool is_float_jump() {
85 // is it the output of MacroAssembler::fb?
86 int x = long_at(0);
87 return is_op2(x, Assembler::fbp_op2) || is_op2(x, Assembler::fb_op2);
88 }
89 bool is_jump() {
90 return is_int_jump() || is_float_jump();
91 }
92 bool is_cond_jump() {
93 int x = long_at(0);
94 return (is_int_jump() && Assembler::inv_cond(x) != Assembler::always) ||
95 (is_float_jump() && Assembler::inv_cond(x) != Assembler::f_always);
96 }
97
98 bool is_stack_bang() {
99 int x = long_at(0);
100 return is_op3(x, Assembler::stw_op3, Assembler::ldst_op) &&
101 (inv_rd(x) == G0) && (inv_rs1(x) == SP) && (inv_rs2(x) == G3_scratch);
102 }
103
104 bool is_prefetch() {
105 int x = long_at(0);
106 return is_op3(x, Assembler::prefetch_op3, Assembler::ldst_op);
107 }
108
109 bool is_membar() {
110 int x = long_at(0);
111 return is_op3(x, Assembler::membar_op3, Assembler::arith_op) &&
112 (inv_rd(x) == G0) && (inv_rs1(x) == O7);
113 }
114
115 bool is_safepoint_poll() {
116 int x = long_at(0);
117 #ifdef _LP64
118 return is_op3(x, Assembler::ldx_op3, Assembler::ldst_op) &&
119 #else
120 return is_op3(x, Assembler::lduw_op3, Assembler::ldst_op) &&
121 #endif
122 (inv_rd(x) == G0) && (inv_immed(x) ? Assembler::inv_simm13(x) == 0 : inv_rs2(x) == G0);
123 }
124
125 bool is_zero_test(Register &reg);
126 bool is_load_store_with_small_offset(Register reg);
127
128 public:
129 #ifdef ASSERT
130 static int rdpc_instruction() { return Assembler::op(Assembler::arith_op ) | Assembler::op3(Assembler::rdreg_op3) | Assembler::u_field(5, 18, 14) | Assembler::rd(O7); }
131 #else
132 // Temporary fix: in optimized mode, u_field is a macro for efficiency reasons (see Assembler::u_field) - needs to be fixed
133 static int rdpc_instruction() { return Assembler::op(Assembler::arith_op ) | Assembler::op3(Assembler::rdreg_op3) | u_field(5, 18, 14) | Assembler::rd(O7); }
134 #endif
135 static int nop_instruction() { return Assembler::op(Assembler::branch_op) | Assembler::op2(Assembler::sethi_op2); }
136 static int illegal_instruction(); // the output of __ breakpoint_trap()
137 static int call_instruction(address destination, address pc) { return Assembler::op(Assembler::call_op) | Assembler::wdisp((intptr_t)destination, (intptr_t)pc, 30); }
138
139 static int branch_instruction(Assembler::op2s op2val, Assembler::Condition c, bool a) {
140 return Assembler::op(Assembler::branch_op) | Assembler::op2(op2val) | Assembler::annul(a) | Assembler::cond(c);
141 }
142
143 static int op3_instruction(Assembler::ops opval, Register rd, Assembler::op3s op3val, Register rs1, int simm13a) {
144 return Assembler::op(opval) | Assembler::rd(rd) | Assembler::op3(op3val) | Assembler::rs1(rs1) | Assembler::immed(true) | Assembler::simm(simm13a, 13);
145 }
146
147 static int sethi_instruction(Register rd, int imm22a) {
148 return Assembler::op(Assembler::branch_op) | Assembler::rd(rd) | Assembler::op2(Assembler::sethi_op2) | Assembler::hi22(imm22a);
149 }
150
151 protected:
152 address addr_at(int offset) const { return address(this) + offset; }
153 int long_at(int offset) const { return *(int*)addr_at(offset); }
154 void set_long_at(int offset, int i); /* deals with I-cache */
155 void set_jlong_at(int offset, jlong i); /* deals with I-cache */
156 void set_addr_at(int offset, address x); /* deals with I-cache */
157
158 address instruction_address() const { return addr_at(0); }
159 address next_instruction_address() const { return addr_at(BytesPerInstWord); }
160
161 static bool is_op( int x, Assembler::ops opval) {
162 return Assembler::inv_op(x) == opval;
163 }
164 static bool is_op2(int x, Assembler::op2s op2val) {
165 return Assembler::inv_op(x) == Assembler::branch_op && Assembler::inv_op2(x) == op2val;
166 }
167 static bool is_op3(int x, Assembler::op3s op3val, Assembler::ops opval) {
168 return Assembler::inv_op(x) == opval && Assembler::inv_op3(x) == op3val;
169 }
170
171 // utilities to help subclasses decode:
172 static Register inv_rd( int x ) { return Assembler::inv_rd( x); }
173 static Register inv_rs1( int x ) { return Assembler::inv_rs1(x); }
174 static Register inv_rs2( int x ) { return Assembler::inv_rs2(x); }
175
176 static bool inv_immed( int x ) { return Assembler::inv_immed(x); }
177 static bool inv_annul( int x ) { return (Assembler::annul(true) & x) != 0; }
178 static int inv_cond( int x ) { return Assembler::inv_cond(x); }
179
180 static int inv_op( int x ) { return Assembler::inv_op( x); }
181 static int inv_op2( int x ) { return Assembler::inv_op2(x); }
182 static int inv_op3( int x ) { return Assembler::inv_op3(x); }
183
184 static int inv_simm( int x, int nbits ) { return Assembler::inv_simm(x, nbits); }
185 static intptr_t inv_wdisp( int x, int nbits ) { return Assembler::inv_wdisp( x, 0, nbits); }
186 static intptr_t inv_wdisp16( int x ) { return Assembler::inv_wdisp16(x, 0); }
187 static int branch_destination_offset(int x) { return Assembler::branch_destination(x, 0); }
188 static int patch_branch_destination_offset(int dest_offset, int x) {
189 return Assembler::patched_branch(dest_offset, x, 0);
190 }
191 void set_annul_bit() { set_long_at(0, long_at(0) | Assembler::annul(true)); }
192
193 // utility for checking if x is either of 2 small constants
194 static bool is_either(int x, int k1, int k2) {
195 // return x == k1 || x == k2;
196 return (1 << x) & (1 << k1 | 1 << k2);
197 }
198
199 // utility for checking overflow of signed instruction fields
200 static bool fits_in_simm(int x, int nbits) {
201 // cf. Assembler::assert_signed_range()
202 // return -(1 << nbits-1) <= x && x < ( 1 << nbits-1),
203 return (unsigned)(x + (1 << nbits-1)) < (unsigned)(1 << nbits);
204 }
205
206 // set a signed immediate field
207 static int set_simm(int insn, int imm, int nbits) {
208 return (insn &~ Assembler::simm(-1, nbits)) | Assembler::simm(imm, nbits);
209 }
210
211 // set a wdisp field (disp should be the difference of two addresses)
212 static int set_wdisp(int insn, intptr_t disp, int nbits) {
213 return (insn &~ Assembler::wdisp((intptr_t)-4, (intptr_t)0, nbits)) | Assembler::wdisp(disp, 0, nbits);
214 }
215
216 static int set_wdisp16(int insn, intptr_t disp) {
217 return (insn &~ Assembler::wdisp16((intptr_t)-4, 0)) | Assembler::wdisp16(disp, 0);
218 }
219
220 // get a simm13 field from an arithmetic or memory instruction
221 static int get_simm13(int insn) {
222 assert(is_either(Assembler::inv_op(insn),
223 Assembler::arith_op, Assembler::ldst_op) &&
224 (insn & Assembler::immed(true)), "must have a simm13 field");
225 return Assembler::inv_simm(insn, 13);
226 }
227
228 // set the simm13 field of an arithmetic or memory instruction
229 static bool set_simm13(int insn, int imm) {
230 get_simm13(insn); // tickle the assertion check
231 return set_simm(insn, imm, 13);
232 }
233
234 // combine the fields of a sethi stream (7 instructions ) and an add, jmp or ld/st
235 static intptr_t data64( address pc, int arith_insn ) {
236 assert(is_op2(*(unsigned int *)pc, Assembler::sethi_op2), "must be sethi");
237 intptr_t hi = (intptr_t)gethi( (unsigned int *)pc );
238 intptr_t lo = (intptr_t)get_simm13(arith_insn);
239 assert((unsigned)lo < (1 << 10), "offset field of set_oop must be 10 bits");
240 return hi | lo;
241 }
242
243 // Regenerate the instruction sequence that performs the 64 bit
244 // sethi. This only does the sethi. The disp field (bottom 10 bits)
245 // must be handled seperately.
246 static void set_data64_sethi(address instaddr, intptr_t x);
247
248 // combine the fields of a sethi/simm13 pair (simm13 = or, add, jmpl, ld/st)
249 static int data32(int sethi_insn, int arith_insn) {
250 assert(is_op2(sethi_insn, Assembler::sethi_op2), "must be sethi");
251 int hi = Assembler::inv_hi22(sethi_insn);
252 int lo = get_simm13(arith_insn);
253 assert((unsigned)lo < (1 << 10), "offset field of set_oop must be 10 bits");
254 return hi | lo;
255 }
256
257 static int set_data32_sethi(int sethi_insn, int imm) {
258 // note that Assembler::hi22 clips the low 10 bits for us
259 assert(is_op2(sethi_insn, Assembler::sethi_op2), "must be sethi");
260 return (sethi_insn &~ Assembler::hi22(-1)) | Assembler::hi22(imm);
261 }
262
263 static int set_data32_simm13(int arith_insn, int imm) {
264 get_simm13(arith_insn); // tickle the assertion check
265 int imm10 = Assembler::low10(imm);
266 return (arith_insn &~ Assembler::simm(-1, 13)) | Assembler::simm(imm10, 13);
267 }
268
269 static int low10(int imm) {
270 return Assembler::low10(imm);
271 }
272
273 // Perform the inverse of the LP64 Macroassembler::sethi
274 // routine. Extracts the 54 bits of address from the instruction
275 // stream. This routine must agree with the sethi routine in
276 // assembler_inline_sparc.hpp
277 static address gethi( unsigned int *pc ) {
278 int i = 0;
279 uintptr_t adr;
280 // We first start out with the real sethi instruction
281 assert(is_op2(*pc, Assembler::sethi_op2), "in gethi - must be sethi");
282 adr = (unsigned int)Assembler::inv_hi22( *(pc++) );
283 i++;
284 while ( i < 7 ) {
285 // We're done if we hit a nop
286 if ( (int)*pc == nop_instruction() ) break;
287 assert ( Assembler::inv_op(*pc) == Assembler::arith_op, "in gethi - must be arith_op" );
288 switch ( Assembler::inv_op3(*pc) ) {
289 case Assembler::xor_op3:
290 adr ^= (intptr_t)get_simm13( *pc );
291 return ( (address)adr );
292 break;
293 case Assembler::sll_op3:
294 adr <<= ( *pc & 0x3f );
295 break;
296 case Assembler::or_op3:
297 adr |= (intptr_t)get_simm13( *pc );
298 break;
299 default:
300 assert ( 0, "in gethi - Should not reach here" );
301 break;
302 }
303 pc++;
304 i++;
305 }
306 return ( (address)adr );
307 }
308
309 public:
310 void verify();
311 void print();
312
313 // unit test stuff
314 static void test() {} // override for testing
315
316 inline friend NativeInstruction* nativeInstruction_at(address address);
317 };
318
319 inline NativeInstruction* nativeInstruction_at(address address) {
320 NativeInstruction* inst = (NativeInstruction*)address;
321 #ifdef ASSERT
322 inst->verify();
323 #endif
324 return inst;
325 }
326
327
328
329 //-----------------------------------------------------------------------------
330
331 // The NativeCall is an abstraction for accessing/manipulating native call imm32 instructions.
332 // (used to manipulate inline caches, primitive & dll calls, etc.)
333 inline NativeCall* nativeCall_at(address instr);
334 inline NativeCall* nativeCall_overwriting_at(address instr,
335 address destination);
336 inline NativeCall* nativeCall_before(address return_address);
337 class NativeCall: public NativeInstruction {
338 public:
339 enum Sparc_specific_constants {
340 instruction_size = 8,
341 return_address_offset = 8,
342 call_displacement_width = 30,
343 displacement_offset = 0,
344 instruction_offset = 0
345 };
346 address instruction_address() const { return addr_at(0); }
347 address next_instruction_address() const { return addr_at(instruction_size); }
348 address return_address() const { return addr_at(return_address_offset); }
349
350 address destination() const { return inv_wdisp(long_at(0), call_displacement_width) + instruction_address(); }
351 address displacement_address() const { return addr_at(displacement_offset); }
352 void set_destination(address dest) { set_long_at(0, set_wdisp(long_at(0), dest - instruction_address(), call_displacement_width)); }
353 void set_destination_mt_safe(address dest);
354
355 void verify_alignment() {} // do nothing on sparc
356 void verify();
357 void print();
358
359 // unit test stuff
360 static void test();
361
362 // Creation
363 friend inline NativeCall* nativeCall_at(address instr);
364 friend NativeCall* nativeCall_overwriting_at(address instr, address destination = NULL) {
365 // insert a "blank" call:
366 NativeCall* call = (NativeCall*)instr;
367 call->set_long_at(0 * BytesPerInstWord, call_instruction(destination, instr));
368 call->set_long_at(1 * BytesPerInstWord, nop_instruction());
369 assert(call->addr_at(2 * BytesPerInstWord) - instr == instruction_size, "instruction size");
370 // check its structure now:
371 assert(nativeCall_at(instr)->destination() == destination, "correct call destination");
372 return call;
373 }
374
375 friend inline NativeCall* nativeCall_before(address return_address) {
376 NativeCall* call = (NativeCall*)(return_address - return_address_offset);
377 #ifdef ASSERT
378 call->verify();
379 #endif
380 return call;
381 }
382
383 static bool is_call_at(address instr) {
384 return nativeInstruction_at(instr)->is_call();
385 }
386
387 static bool is_call_before(address instr) {
388 return nativeInstruction_at(instr - return_address_offset)->is_call();
389 }
390
391 static bool is_call_to(address instr, address target) {
392 return nativeInstruction_at(instr)->is_call() &&
393 nativeCall_at(instr)->destination() == target;
394 }
395
396 // MT-safe patching of a call instruction.
397 static void insert(address code_pos, address entry) {
398 (void)nativeCall_overwriting_at(code_pos, entry);
399 }
400
401 static void replace_mt_safe(address instr_addr, address code_buffer);
402 };
403 inline NativeCall* nativeCall_at(address instr) {
404 NativeCall* call = (NativeCall*)instr;
405 #ifdef ASSERT
406 call->verify();
407 #endif
408 return call;
409 }
410
411 // The NativeFarCall is an abstraction for accessing/manipulating native call-anywhere
412 // instructions in the sparcv9 vm. Used to call native methods which may be loaded
413 // anywhere in the address space, possibly out of reach of a call instruction.
414
415 #ifndef _LP64
416
417 // On 32-bit systems, a far call is the same as a near one.
418 class NativeFarCall;
419 inline NativeFarCall* nativeFarCall_at(address instr);
420 class NativeFarCall : public NativeCall {
421 public:
422 friend inline NativeFarCall* nativeFarCall_at(address instr) { return (NativeFarCall*)nativeCall_at(instr); }
423 friend NativeFarCall* nativeFarCall_overwriting_at(address instr, address destination = NULL)
424 { return (NativeFarCall*)nativeCall_overwriting_at(instr, destination); }
425 friend NativeFarCall* nativeFarCall_before(address return_address)
426 { return (NativeFarCall*)nativeCall_before(return_address); }
427 };
428
429 #else
430
431 // The format of this extended-range call is:
432 // jumpl_to addr, lreg
433 // == sethi %hi54(addr), O7 ; jumpl O7, %lo10(addr), O7 ; <delay>
434 // That is, it is essentially the same as a NativeJump.
435 class NativeFarCall;
436 inline NativeFarCall* nativeFarCall_overwriting_at(address instr, address destination);
437 inline NativeFarCall* nativeFarCall_at(address instr);
438 class NativeFarCall: public NativeInstruction {
439 public:
440 enum Sparc_specific_constants {
441 // instruction_size includes the delay slot instruction.
442 instruction_size = 9 * BytesPerInstWord,
443 return_address_offset = 9 * BytesPerInstWord,
444 jmpl_offset = 7 * BytesPerInstWord,
445 displacement_offset = 0,
446 instruction_offset = 0
447 };
448 address instruction_address() const { return addr_at(0); }
449 address next_instruction_address() const { return addr_at(instruction_size); }
450 address return_address() const { return addr_at(return_address_offset); }
451
452 address destination() const {
453 return (address) data64(addr_at(0), long_at(jmpl_offset));
454 }
455 address displacement_address() const { return addr_at(displacement_offset); }
456 void set_destination(address dest);
457
458 bool destination_is_compiled_verified_entry_point();
459
460 void verify();
461 void print();
462
463 // unit test stuff
464 static void test();
465
466 // Creation
467 friend inline NativeFarCall* nativeFarCall_at(address instr) {
468 NativeFarCall* call = (NativeFarCall*)instr;
469 #ifdef ASSERT
470 call->verify();
471 #endif
472 return call;
473 }
474
475 friend inline NativeFarCall* nativeFarCall_overwriting_at(address instr, address destination = NULL) {
476 Unimplemented();
477 NativeFarCall* call = (NativeFarCall*)instr;
478 return call;
479 }
480
481 friend NativeFarCall* nativeFarCall_before(address return_address) {
482 NativeFarCall* call = (NativeFarCall*)(return_address - return_address_offset);
483 #ifdef ASSERT
484 call->verify();
485 #endif
486 return call;
487 }
488
489 static bool is_call_at(address instr);
490
491 // MT-safe patching of a call instruction.
492 static void insert(address code_pos, address entry) {
493 (void)nativeFarCall_overwriting_at(code_pos, entry);
494 }
495 static void replace_mt_safe(address instr_addr, address code_buffer);
496 };
497
498 #endif // _LP64
499
500 // An interface for accessing/manipulating native set_oop imm, reg instructions.
501 // (used to manipulate inlined data references, etc.)
502 // set_oop imm, reg
503 // == sethi %hi22(imm), reg ; add reg, %lo10(imm), reg
504 class NativeMovConstReg;
505 inline NativeMovConstReg* nativeMovConstReg_at(address address);
506 class NativeMovConstReg: public NativeInstruction {
507 public:
508 enum Sparc_specific_constants {
509 sethi_offset = 0,
510 #ifdef _LP64
511 add_offset = 7 * BytesPerInstWord,
512 instruction_size = 8 * BytesPerInstWord
513 #else
514 add_offset = 4,
515 instruction_size = 8
516 #endif
517 };
518
519 address instruction_address() const { return addr_at(0); }
520 address next_instruction_address() const { return addr_at(instruction_size); }
521
522 // (The [set_]data accessor respects oop_type relocs also.)
523 intptr_t data() const;
524 void set_data(intptr_t x);
525
526 // report the destination register
527 Register destination() { return inv_rd(long_at(sethi_offset)); }
528
529 void verify();
530 void print();
531
532 // unit test stuff
533 static void test();
534
535 // Creation
536 friend inline NativeMovConstReg* nativeMovConstReg_at(address address) {
537 NativeMovConstReg* test = (NativeMovConstReg*)address;
538 #ifdef ASSERT
539 test->verify();
540 #endif
541 return test;
542 }
543
544
545 friend NativeMovConstReg* nativeMovConstReg_before(address address) {
546 NativeMovConstReg* test = (NativeMovConstReg*)(address - instruction_size);
547 #ifdef ASSERT
548 test->verify();
549 #endif
550 return test;
551 }
552
553 };
554
555
556 // An interface for accessing/manipulating native set_oop imm, reg instructions.
557 // (used to manipulate inlined data references, etc.)
558 // set_oop imm, reg
559 // == sethi %hi22(imm), reg; nop; add reg, %lo10(imm), reg
560 //
561 // Note that it is identical to NativeMovConstReg with the exception of a nop between the
562 // sethi and the add. The nop is required to be in the delay slot of the call instruction
563 // which overwrites the sethi during patching.
564 class NativeMovConstRegPatching;
565 inline NativeMovConstRegPatching* nativeMovConstRegPatching_at(address address);class NativeMovConstRegPatching: public NativeInstruction {
566 public:
567 enum Sparc_specific_constants {
568 sethi_offset = 0,
569 #ifdef _LP64
570 nop_offset = 7 * BytesPerInstWord,
571 #else
572 nop_offset = sethi_offset + BytesPerInstWord,
573 #endif
574 add_offset = nop_offset + BytesPerInstWord,
575 instruction_size = add_offset + BytesPerInstWord
576 };
577
578 address instruction_address() const { return addr_at(0); }
579 address next_instruction_address() const { return addr_at(instruction_size); }
580
581 // (The [set_]data accessor respects oop_type relocs also.)
582 int data() const;
583 void set_data(int x);
584
585 // report the destination register
586 Register destination() { return inv_rd(long_at(sethi_offset)); }
587
588 void verify();
589 void print();
590
591 // unit test stuff
592 static void test();
593
594 // Creation
595 friend inline NativeMovConstRegPatching* nativeMovConstRegPatching_at(address address) {
596 NativeMovConstRegPatching* test = (NativeMovConstRegPatching*)address;
597 #ifdef ASSERT
598 test->verify();
599 #endif
600 return test;
601 }
602
603
604 friend NativeMovConstRegPatching* nativeMovConstRegPatching_before(address address) {
605 NativeMovConstRegPatching* test = (NativeMovConstRegPatching*)(address - instruction_size);
606 #ifdef ASSERT
607 test->verify();
608 #endif
609 return test;
610 }
611
612 };
613
614
615 // An interface for accessing/manipulating native memory ops
616 // ld* [reg + offset], reg
617 // st* reg, [reg + offset]
618 // sethi %hi(imm), reg; add reg, %lo(imm), reg; ld* [reg1 + reg], reg2
619 // sethi %hi(imm), reg; add reg, %lo(imm), reg; st* reg2, [reg1 + reg]
620 // Ops covered: {lds,ldu,st}{w,b,h}, {ld,st}{d,x}
621 //
622 class NativeMovRegMem;
623 inline NativeMovRegMem* nativeMovRegMem_at (address address);
624 class NativeMovRegMem: public NativeInstruction {
625 public:
626 enum Sparc_specific_constants {
627 op3_mask_ld = 1 << Assembler::lduw_op3 |
628 1 << Assembler::ldub_op3 |
629 1 << Assembler::lduh_op3 |
630 1 << Assembler::ldd_op3 |
631 1 << Assembler::ldsw_op3 |
632 1 << Assembler::ldsb_op3 |
633 1 << Assembler::ldsh_op3 |
634 1 << Assembler::ldx_op3,
635 op3_mask_st = 1 << Assembler::stw_op3 |
636 1 << Assembler::stb_op3 |
637 1 << Assembler::sth_op3 |
638 1 << Assembler::std_op3 |
639 1 << Assembler::stx_op3,
640 op3_ldst_int_limit = Assembler::ldf_op3,
641 op3_mask_ldf = 1 << (Assembler::ldf_op3 - op3_ldst_int_limit) |
642 1 << (Assembler::lddf_op3 - op3_ldst_int_limit),
643 op3_mask_stf = 1 << (Assembler::stf_op3 - op3_ldst_int_limit) |
644 1 << (Assembler::stdf_op3 - op3_ldst_int_limit),
645
646 offset_width = 13,
647 sethi_offset = 0,
648 #ifdef _LP64
649 add_offset = 7 * BytesPerInstWord,
650 #else
651 add_offset = 4,
652 #endif
653 ldst_offset = add_offset + BytesPerInstWord
654 };
655 bool is_immediate() const {
656 // check if instruction is ld* [reg + offset], reg or st* reg, [reg + offset]
657 int i0 = long_at(0);
658 return (is_op(i0, Assembler::ldst_op));
659 }
660
661 address instruction_address() const { return addr_at(0); }
662 address next_instruction_address() const {
663 #ifdef _LP64
664 return addr_at(is_immediate() ? 4 : (7 * BytesPerInstWord));
665 #else
666 return addr_at(is_immediate() ? 4 : 12);
667 #endif
668 }
669 intptr_t offset() const {
670 return is_immediate()? inv_simm(long_at(0), offset_width) :
671 nativeMovConstReg_at(addr_at(0))->data();
672 }
673 void set_offset(intptr_t x) {
674 if (is_immediate()) {
675 guarantee(fits_in_simm(x, offset_width), "data block offset overflow");
676 set_long_at(0, set_simm(long_at(0), x, offset_width));
677 } else
678 nativeMovConstReg_at(addr_at(0))->set_data(x);
679 }
680
681 void add_offset_in_bytes(intptr_t radd_offset) {
682 set_offset (offset() + radd_offset);
683 }
684
685 void copy_instruction_to(address new_instruction_address);
686
687 void verify();
688 void print ();
689
690 // unit test stuff
691 static void test();
692
693 private:
694 friend inline NativeMovRegMem* nativeMovRegMem_at (address address) {
695 NativeMovRegMem* test = (NativeMovRegMem*)address;
696 #ifdef ASSERT
697 test->verify();
698 #endif
699 return test;
700 }
701 };
702
703
704 // An interface for accessing/manipulating native memory ops
705 // ld* [reg + offset], reg
706 // st* reg, [reg + offset]
707 // sethi %hi(imm), reg; nop; add reg, %lo(imm), reg; ld* [reg1 + reg], reg2
708 // sethi %hi(imm), reg; nop; add reg, %lo(imm), reg; st* reg2, [reg1 + reg]
709 // Ops covered: {lds,ldu,st}{w,b,h}, {ld,st}{d,x}
710 //
711 // Note that it is identical to NativeMovRegMem with the exception of a nop between the
712 // sethi and the add. The nop is required to be in the delay slot of the call instruction
713 // which overwrites the sethi during patching.
714 class NativeMovRegMemPatching;
715 inline NativeMovRegMemPatching* nativeMovRegMemPatching_at (address address);
716 class NativeMovRegMemPatching: public NativeInstruction {
717 public:
718 enum Sparc_specific_constants {
719 op3_mask_ld = 1 << Assembler::lduw_op3 |
720 1 << Assembler::ldub_op3 |
721 1 << Assembler::lduh_op3 |
722 1 << Assembler::ldd_op3 |
723 1 << Assembler::ldsw_op3 |
724 1 << Assembler::ldsb_op3 |
725 1 << Assembler::ldsh_op3 |
726 1 << Assembler::ldx_op3,
727 op3_mask_st = 1 << Assembler::stw_op3 |
728 1 << Assembler::stb_op3 |
729 1 << Assembler::sth_op3 |
730 1 << Assembler::std_op3 |
731 1 << Assembler::stx_op3,
732 op3_ldst_int_limit = Assembler::ldf_op3,
733 op3_mask_ldf = 1 << (Assembler::ldf_op3 - op3_ldst_int_limit) |
734 1 << (Assembler::lddf_op3 - op3_ldst_int_limit),
735 op3_mask_stf = 1 << (Assembler::stf_op3 - op3_ldst_int_limit) |
736 1 << (Assembler::stdf_op3 - op3_ldst_int_limit),
737
738 offset_width = 13,
739 sethi_offset = 0,
740 #ifdef _LP64
741 nop_offset = 7 * BytesPerInstWord,
742 #else
743 nop_offset = 4,
744 #endif
745 add_offset = nop_offset + BytesPerInstWord,
746 ldst_offset = add_offset + BytesPerInstWord
747 };
748 bool is_immediate() const {
749 // check if instruction is ld* [reg + offset], reg or st* reg, [reg + offset]
750 int i0 = long_at(0);
751 return (is_op(i0, Assembler::ldst_op));
752 }
753
754 address instruction_address() const { return addr_at(0); }
755 address next_instruction_address() const {
756 return addr_at(is_immediate()? 4 : 16);
757 }
758 int offset() const {
759 return is_immediate()? inv_simm(long_at(0), offset_width) :
760 nativeMovConstRegPatching_at(addr_at(0))->data();
761 }
762 void set_offset(int x) {
763 if (is_immediate()) {
764 guarantee(fits_in_simm(x, offset_width), "data block offset overflow");
765 set_long_at(0, set_simm(long_at(0), x, offset_width));
766 }
767 else
768 nativeMovConstRegPatching_at(addr_at(0))->set_data(x);
769 }
770
771 void add_offset_in_bytes(intptr_t radd_offset) {
772 set_offset (offset() + radd_offset);
773 }
774
775 void copy_instruction_to(address new_instruction_address);
776
777 void verify();
778 void print ();
779
780 // unit test stuff
781 static void test();
782
783 private:
784 friend inline NativeMovRegMemPatching* nativeMovRegMemPatching_at (address address) {
785 NativeMovRegMemPatching* test = (NativeMovRegMemPatching*)address;
786 #ifdef ASSERT
787 test->verify();
788 #endif
789 return test;
790 }
791 };
792
793
794 // An interface for accessing/manipulating native jumps
795 // jump_to addr
796 // == sethi %hi22(addr), temp ; jumpl reg, %lo10(addr), G0 ; <delay>
797 // jumpl_to addr, lreg
798 // == sethi %hi22(addr), temp ; jumpl reg, %lo10(addr), lreg ; <delay>
799 class NativeJump;
800 inline NativeJump* nativeJump_at(address address);
801 class NativeJump: public NativeInstruction {
802 private:
803 void guarantee_displacement(int disp, int width) {
804 guarantee(fits_in_simm(disp, width + 2), "branch displacement overflow");
805 }
806
807 public:
808 enum Sparc_specific_constants {
809 sethi_offset = 0,
810 #ifdef _LP64
811 jmpl_offset = 7 * BytesPerInstWord,
812 instruction_size = 9 * BytesPerInstWord // includes delay slot
813 #else
814 jmpl_offset = 1 * BytesPerInstWord,
815 instruction_size = 3 * BytesPerInstWord // includes delay slot
816 #endif
817 };
818
819 address instruction_address() const { return addr_at(0); }
820 address next_instruction_address() const { return addr_at(instruction_size); }
821
822 #ifdef _LP64
823 address jump_destination() const {
824 return (address) data64(instruction_address(), long_at(jmpl_offset));
825 }
826 void set_jump_destination(address dest) {
827 set_data64_sethi( instruction_address(), (intptr_t)dest);
828 set_long_at(jmpl_offset, set_data32_simm13( long_at(jmpl_offset), (intptr_t)dest));
829 }
830 #else
831 address jump_destination() const {
832 return (address) data32(long_at(sethi_offset), long_at(jmpl_offset));
833 }
834 void set_jump_destination(address dest) {
835 set_long_at(sethi_offset, set_data32_sethi( long_at(sethi_offset), (intptr_t)dest));
836 set_long_at(jmpl_offset, set_data32_simm13( long_at(jmpl_offset), (intptr_t)dest));
837 }
838 #endif
839
840 // Creation
841 friend inline NativeJump* nativeJump_at(address address) {
842 NativeJump* jump = (NativeJump*)address;
843 #ifdef ASSERT
844 jump->verify();
845 #endif
846 return jump;
847 }
848
849 void verify();
850 void print();
851
852 // Unit testing stuff
853 static void test();
854
855 // Insertion of native jump instruction
856 static void insert(address code_pos, address entry);
857 // MT-safe insertion of native jump at verified method entry
858 static void check_verified_entry_alignment(address entry, address verified_entry) {
859 // nothing to do for sparc.
860 }
861 static void patch_verified_entry(address entry, address verified_entry, address dest);
862 };
863
864
865
866 // Despite the name, handles only simple branches.
867 class NativeGeneralJump;
868 inline NativeGeneralJump* nativeGeneralJump_at(address address);
869 class NativeGeneralJump: public NativeInstruction {
870 public:
871 enum Sparc_specific_constants {
872 instruction_size = 8
873 };
874
875 address instruction_address() const { return addr_at(0); }
876 address jump_destination() const { return addr_at(0) + branch_destination_offset(long_at(0)); }
877 void set_jump_destination(address dest) {
878 int patched_instr = patch_branch_destination_offset(dest - addr_at(0), long_at(0));
879 set_long_at(0, patched_instr);
880 }
881 void set_annul() { set_annul_bit(); }
882 NativeInstruction *delay_slot_instr() { return nativeInstruction_at(addr_at(4));}
883 void fill_delay_slot(int instr) { set_long_at(4, instr);}
884 Assembler::Condition condition() {
885 int x = long_at(0);
886 return (Assembler::Condition) Assembler::inv_cond(x);
887 }
888
889 // Creation
890 friend inline NativeGeneralJump* nativeGeneralJump_at(address address) {
891 NativeGeneralJump* jump = (NativeGeneralJump*)(address);
892 #ifdef ASSERT
893 jump->verify();
894 #endif
895 return jump;
896 }
897
898 // Insertion of native general jump instruction
899 static void insert_unconditional(address code_pos, address entry);
900 static void replace_mt_safe(address instr_addr, address code_buffer);
901
902 void verify();
903 };
904
905
906 class NativeIllegalInstruction: public NativeInstruction {
907 public:
908 enum Sparc_specific_constants {
909 instruction_size = 4
910 };
911
912 // Insert illegal opcode as specific address
913 static void insert(address code_pos);
914 };