1 /*
2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. 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 *
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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.
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
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23 */
24
25 #ifndef CPU_SPARC_VM_NATIVEINST_SPARC_HPP
26 #define CPU_SPARC_VM_NATIVEINST_SPARC_HPP
27
28 #include "asm/macroAssembler.hpp"
29 #include "memory/allocation.hpp"
30 #include "runtime/icache.hpp"
31 #include "runtime/os.hpp"
32 #include "utilities/top.hpp"
33
34 // We have interface for the following instructions:
35 // - NativeInstruction
36 // - - NativeCall
37 // - - NativeFarCall
38 // - - NativeMovConstReg
39 // - - NativeMovConstRegPatching
40 // - - NativeMovRegMem
41 // - - NativeJump
42 // - - NativeGeneralJump
43 // - - NativeIllegalInstruction
44 // The base class for different kinds of native instruction abstractions.
45 // Provides the primitive operations to manipulate code relative to this.
46 class NativeInstruction VALUE_OBJ_CLASS_SPEC {
47 friend class Relocation;
48
49 public:
50 enum Sparc_specific_constants {
51 nop_instruction_size = 4
52 };
53
54 bool is_nop() { return long_at(0) == nop_instruction(); }
55 bool is_call() { return is_op(long_at(0), Assembler::call_op); }
56 bool is_sethi() { return (is_op2(long_at(0), Assembler::sethi_op2)
57 && inv_rd(long_at(0)) != G0); }
58
59 bool sets_cc() {
60 // conservative (returns true for some instructions that do not set the
61 // the condition code, such as, "save".
62 // Does not return true for the deprecated tagged instructions, such as, TADDcc
63 int x = long_at(0);
64 return (is_op(x, Assembler::arith_op) &&
65 (inv_op3(x) & Assembler::cc_bit_op3) == Assembler::cc_bit_op3);
66 }
67 bool is_illegal();
68 bool is_zombie() {
69 int x = long_at(0);
70 return is_op3(x,
71 Assembler::ldsw_op3,
72 Assembler::ldst_op)
73 && Assembler::inv_rs1(x) == G0
74 && Assembler::inv_rd(x) == O7;
75 }
76 bool is_ic_miss_trap(); // Inline-cache uses a trap to detect a miss
77 bool is_return() {
78 // is it the output of MacroAssembler::ret or MacroAssembler::retl?
79 int x = long_at(0);
80 const int pc_return_offset = 8; // see frame_sparc.hpp
81 return is_op3(x, Assembler::jmpl_op3, Assembler::arith_op)
82 && (inv_rs1(x) == I7 || inv_rs1(x) == O7)
83 && inv_immed(x) && inv_simm(x, 13) == pc_return_offset
84 && inv_rd(x) == G0;
85 }
86 bool is_int_jump() {
87 // is it the output of MacroAssembler::b?
88 int x = long_at(0);
89 return is_op2(x, Assembler::bp_op2) || is_op2(x, Assembler::br_op2);
90 }
91 bool is_float_jump() {
92 // is it the output of MacroAssembler::fb?
93 int x = long_at(0);
94 return is_op2(x, Assembler::fbp_op2) || is_op2(x, Assembler::fb_op2);
95 }
96 bool is_jump() {
97 return is_int_jump() || is_float_jump();
98 }
99 bool is_cond_jump() {
100 int x = long_at(0);
101 return (is_int_jump() && Assembler::inv_cond(x) != Assembler::always) ||
102 (is_float_jump() && Assembler::inv_cond(x) != Assembler::f_always);
103 }
104
105 bool is_stack_bang() {
106 int x = long_at(0);
107 return is_op3(x, Assembler::stw_op3, Assembler::ldst_op) &&
108 (inv_rd(x) == G0) && (inv_rs1(x) == SP) && (inv_rs2(x) == G3_scratch);
109 }
110
111 bool is_prefetch() {
112 int x = long_at(0);
113 return is_op3(x, Assembler::prefetch_op3, Assembler::ldst_op);
114 }
115
116 bool is_membar() {
117 int x = long_at(0);
118 return is_op3(x, Assembler::membar_op3, Assembler::arith_op) &&
119 (inv_rd(x) == G0) && (inv_rs1(x) == O7);
120 }
121
122 bool is_safepoint_poll() {
123 int x = long_at(0);
124 #ifdef _LP64
125 return is_op3(x, Assembler::ldx_op3, Assembler::ldst_op) &&
126 #else
127 return is_op3(x, Assembler::lduw_op3, Assembler::ldst_op) &&
128 #endif
129 (inv_rd(x) == G0) && (inv_immed(x) ? Assembler::inv_simm13(x) == 0 : inv_rs2(x) == G0);
130 }
131
132 bool is_zero_test(Register ®);
133 bool is_load_store_with_small_offset(Register reg);
134
135 public:
136 #ifdef ASSERT
137 static int rdpc_instruction() { return Assembler::op(Assembler::arith_op ) | Assembler::op3(Assembler::rdreg_op3) | Assembler::u_field(5, 18, 14) | Assembler::rd(O7); }
138 #else
139 // Temporary fix: in optimized mode, u_field is a macro for efficiency reasons (see Assembler::u_field) - needs to be fixed
140 static int rdpc_instruction() { return Assembler::op(Assembler::arith_op ) | Assembler::op3(Assembler::rdreg_op3) | u_field(5, 18, 14) | Assembler::rd(O7); }
141 #endif
142 static int nop_instruction() { return Assembler::op(Assembler::branch_op) | Assembler::op2(Assembler::sethi_op2); }
143 static int illegal_instruction(); // the output of __ breakpoint_trap()
144 static int call_instruction(address destination, address pc) { return Assembler::op(Assembler::call_op) | Assembler::wdisp((intptr_t)destination, (intptr_t)pc, 30); }
145
146 static int branch_instruction(Assembler::op2s op2val, Assembler::Condition c, bool a) {
147 return Assembler::op(Assembler::branch_op) | Assembler::op2(op2val) | Assembler::annul(a) | Assembler::cond(c);
148 }
149
150 static int op3_instruction(Assembler::ops opval, Register rd, Assembler::op3s op3val, Register rs1, int simm13a) {
151 return Assembler::op(opval) | Assembler::rd(rd) | Assembler::op3(op3val) | Assembler::rs1(rs1) | Assembler::immed(true) | Assembler::simm(simm13a, 13);
152 }
153
154 static int sethi_instruction(Register rd, int imm22a) {
155 return Assembler::op(Assembler::branch_op) | Assembler::rd(rd) | Assembler::op2(Assembler::sethi_op2) | Assembler::hi22(imm22a);
156 }
157
158 protected:
159 address addr_at(int offset) const { return address(this) + offset; }
160 int long_at(int offset) const { return *(int*)addr_at(offset); }
161 void set_long_at(int offset, int i); /* deals with I-cache */
162 void set_jlong_at(int offset, jlong i); /* deals with I-cache */
163 void set_addr_at(int offset, address x); /* deals with I-cache */
164
165 address instruction_address() const { return addr_at(0); }
166 address next_instruction_address() const { return addr_at(BytesPerInstWord); }
167
168 static bool is_op( int x, Assembler::ops opval) {
169 return Assembler::inv_op(x) == opval;
170 }
171 static bool is_op2(int x, Assembler::op2s op2val) {
172 return Assembler::inv_op(x) == Assembler::branch_op && Assembler::inv_op2(x) == op2val;
173 }
174 static bool is_op3(int x, Assembler::op3s op3val, Assembler::ops opval) {
175 return Assembler::inv_op(x) == opval && Assembler::inv_op3(x) == op3val;
176 }
177
178 // utilities to help subclasses decode:
179 static Register inv_rd( int x ) { return Assembler::inv_rd( x); }
180 static Register inv_rs1( int x ) { return Assembler::inv_rs1(x); }
181 static Register inv_rs2( int x ) { return Assembler::inv_rs2(x); }
182
183 static bool inv_immed( int x ) { return Assembler::inv_immed(x); }
184 static bool inv_annul( int x ) { return (Assembler::annul(true) & x) != 0; }
185 static int inv_cond( int x ) { return Assembler::inv_cond(x); }
186
187 static int inv_op( int x ) { return Assembler::inv_op( x); }
188 static int inv_op2( int x ) { return Assembler::inv_op2(x); }
189 static int inv_op3( int x ) { return Assembler::inv_op3(x); }
190
191 static int inv_simm( int x, int nbits ) { return Assembler::inv_simm(x, nbits); }
192 static intptr_t inv_wdisp( int x, int nbits ) { return Assembler::inv_wdisp( x, 0, nbits); }
193 static intptr_t inv_wdisp16( int x ) { return Assembler::inv_wdisp16(x, 0); }
194 static int branch_destination_offset(int x) { return MacroAssembler::branch_destination(x, 0); }
195 static int patch_branch_destination_offset(int dest_offset, int x) {
196 return MacroAssembler::patched_branch(dest_offset, x, 0);
197 }
198
199 // utility for checking if x is either of 2 small constants
200 static bool is_either(int x, int k1, int k2) {
201 // return x == k1 || x == k2;
202 return (1 << x) & (1 << k1 | 1 << k2);
203 }
204
205 // utility for checking overflow of signed instruction fields
206 static bool fits_in_simm(int x, int nbits) {
207 // cf. Assembler::assert_signed_range()
208 // return -(1 << nbits-1) <= x && x < ( 1 << nbits-1),
209 return (unsigned)(x + (1 << nbits-1)) < (unsigned)(1 << nbits);
210 }
211
212 // set a signed immediate field
213 static int set_simm(int insn, int imm, int nbits) {
214 return (insn &~ Assembler::simm(-1, nbits)) | Assembler::simm(imm, nbits);
215 }
216
217 // set a wdisp field (disp should be the difference of two addresses)
218 static int set_wdisp(int insn, intptr_t disp, int nbits) {
219 return (insn &~ Assembler::wdisp((intptr_t)-4, (intptr_t)0, nbits)) | Assembler::wdisp(disp, 0, nbits);
220 }
221
222 static int set_wdisp16(int insn, intptr_t disp) {
223 return (insn &~ Assembler::wdisp16((intptr_t)-4, 0)) | Assembler::wdisp16(disp, 0);
224 }
225
226 // get a simm13 field from an arithmetic or memory instruction
227 static int get_simm13(int insn) {
228 assert(is_either(Assembler::inv_op(insn),
229 Assembler::arith_op, Assembler::ldst_op) &&
230 (insn & Assembler::immed(true)), "must have a simm13 field");
231 return Assembler::inv_simm(insn, 13);
232 }
233
234 // set the simm13 field of an arithmetic or memory instruction
235 static bool set_simm13(int insn, int imm) {
236 get_simm13(insn); // tickle the assertion check
237 return set_simm(insn, imm, 13);
238 }
239
240 // combine the fields of a sethi stream (7 instructions ) and an add, jmp or ld/st
241 static intptr_t data64( address pc, int arith_insn ) {
242 assert(is_op2(*(unsigned int *)pc, Assembler::sethi_op2), "must be sethi");
243 intptr_t hi = (intptr_t)gethi( (unsigned int *)pc );
244 intptr_t lo = (intptr_t)get_simm13(arith_insn);
245 assert((unsigned)lo < (1 << 10), "offset field of set_metadata must be 10 bits");
246 return hi | lo;
247 }
248
249 // Regenerate the instruction sequence that performs the 64 bit
250 // sethi. This only does the sethi. The disp field (bottom 10 bits)
251 // must be handled separately.
252 static void set_data64_sethi(address instaddr, intptr_t x);
253 static void verify_data64_sethi(address instaddr, intptr_t x);
254
255 // combine the fields of a sethi/simm13 pair (simm13 = or, add, jmpl, ld/st)
256 static int data32(int sethi_insn, int arith_insn) {
257 assert(is_op2(sethi_insn, Assembler::sethi_op2), "must be sethi");
258 int hi = Assembler::inv_hi22(sethi_insn);
259 int lo = get_simm13(arith_insn);
260 assert((unsigned)lo < (1 << 10), "offset field of set_metadata must be 10 bits");
261 return hi | lo;
262 }
263
264 static int set_data32_sethi(int sethi_insn, int imm) {
265 // note that Assembler::hi22 clips the low 10 bits for us
266 assert(is_op2(sethi_insn, Assembler::sethi_op2), "must be sethi");
267 return (sethi_insn &~ Assembler::hi22(-1)) | Assembler::hi22(imm);
268 }
269
270 static int set_data32_simm13(int arith_insn, int imm) {
271 get_simm13(arith_insn); // tickle the assertion check
272 int imm10 = Assembler::low10(imm);
273 return (arith_insn &~ Assembler::simm(-1, 13)) | Assembler::simm(imm10, 13);
274 }
275
276 static int low10(int imm) {
277 return Assembler::low10(imm);
278 }
279
280 // Perform the inverse of the LP64 Macroassembler::sethi
281 // routine. Extracts the 54 bits of address from the instruction
282 // stream. This routine must agree with the sethi routine in
283 // assembler_inline_sparc.hpp
284 static address gethi( unsigned int *pc ) {
285 int i = 0;
286 uintptr_t adr;
287 // We first start out with the real sethi instruction
288 assert(is_op2(*pc, Assembler::sethi_op2), "in gethi - must be sethi");
289 adr = (unsigned int)Assembler::inv_hi22( *(pc++) );
290 i++;
291 while ( i < 7 ) {
292 // We're done if we hit a nop
293 if ( (int)*pc == nop_instruction() ) break;
294 assert ( Assembler::inv_op(*pc) == Assembler::arith_op, "in gethi - must be arith_op" );
295 switch ( Assembler::inv_op3(*pc) ) {
296 case Assembler::xor_op3:
297 adr ^= (intptr_t)get_simm13( *pc );
298 return ( (address)adr );
299 break;
300 case Assembler::sll_op3:
301 adr <<= ( *pc & 0x3f );
302 break;
303 case Assembler::or_op3:
304 adr |= (intptr_t)get_simm13( *pc );
305 break;
306 default:
307 assert ( 0, "in gethi - Should not reach here" );
308 break;
309 }
310 pc++;
311 i++;
312 }
313 return ( (address)adr );
314 }
315
316 public:
317 void verify();
318 void print();
319
320 // unit test stuff
321 static void test() {} // override for testing
322
323 inline friend NativeInstruction* nativeInstruction_at(address address);
324 };
325
326 inline NativeInstruction* nativeInstruction_at(address address) {
327 NativeInstruction* inst = (NativeInstruction*)address;
328 #ifdef ASSERT
329 inst->verify();
330 #endif
331 return inst;
332 }
333
334
335
336 //-----------------------------------------------------------------------------
337
338 // The NativeCall is an abstraction for accessing/manipulating native call imm32 instructions.
339 // (used to manipulate inline caches, primitive & dll calls, etc.)
340 inline NativeCall* nativeCall_at(address instr);
341 inline NativeCall* nativeCall_overwriting_at(address instr,
342 address destination);
343 inline NativeCall* nativeCall_before(address return_address);
344 class NativeCall: public NativeInstruction {
345 public:
346 enum Sparc_specific_constants {
347 instruction_size = 8,
348 return_address_offset = 8,
349 call_displacement_width = 30,
350 displacement_offset = 0,
351 instruction_offset = 0
352 };
353 address instruction_address() const { return addr_at(0); }
354 address next_instruction_address() const { return addr_at(instruction_size); }
355 address return_address() const { return addr_at(return_address_offset); }
356
357 address destination() const { return inv_wdisp(long_at(0), call_displacement_width) + instruction_address(); }
358 address displacement_address() const { return addr_at(displacement_offset); }
359 void set_destination(address dest) { set_long_at(0, set_wdisp(long_at(0), dest - instruction_address(), call_displacement_width)); }
360 void set_destination_mt_safe(address dest);
361
362 void verify_alignment() {} // do nothing on sparc
363 void verify();
364 void print();
365
366 // unit test stuff
367 static void test();
368
369 // Creation
370 friend inline NativeCall* nativeCall_at(address instr);
371 friend NativeCall* nativeCall_overwriting_at(address instr, address destination = NULL) {
372 // insert a "blank" call:
373 NativeCall* call = (NativeCall*)instr;
374 call->set_long_at(0 * BytesPerInstWord, call_instruction(destination, instr));
375 call->set_long_at(1 * BytesPerInstWord, nop_instruction());
376 assert(call->addr_at(2 * BytesPerInstWord) - instr == instruction_size, "instruction size");
377 // check its structure now:
378 assert(nativeCall_at(instr)->destination() == destination, "correct call destination");
379 return call;
380 }
381
382 friend inline NativeCall* nativeCall_before(address return_address) {
383 NativeCall* call = (NativeCall*)(return_address - return_address_offset);
384 #ifdef ASSERT
385 call->verify();
386 #endif
387 return call;
388 }
389
390 static bool is_call_at(address instr) {
391 return nativeInstruction_at(instr)->is_call();
392 }
393
394 static bool is_call_before(address instr) {
395 return nativeInstruction_at(instr - return_address_offset)->is_call();
396 }
397
398 static bool is_call_to(address instr, address target) {
399 return nativeInstruction_at(instr)->is_call() &&
400 nativeCall_at(instr)->destination() == target;
401 }
402
403 // MT-safe patching of a call instruction.
404 static void insert(address code_pos, address entry) {
405 (void)nativeCall_overwriting_at(code_pos, entry);
406 }
407
408 static void replace_mt_safe(address instr_addr, address code_buffer);
409 };
410 inline NativeCall* nativeCall_at(address instr) {
411 NativeCall* call = (NativeCall*)instr;
412 #ifdef ASSERT
413 call->verify();
414 #endif
415 return call;
416 }
417
418 // The NativeFarCall is an abstraction for accessing/manipulating native call-anywhere
419 // instructions in the sparcv9 vm. Used to call native methods which may be loaded
420 // anywhere in the address space, possibly out of reach of a call instruction.
421
422 #ifndef _LP64
423
424 // On 32-bit systems, a far call is the same as a near one.
425 class NativeFarCall;
426 inline NativeFarCall* nativeFarCall_at(address instr);
427 class NativeFarCall : public NativeCall {
428 public:
429 friend inline NativeFarCall* nativeFarCall_at(address instr) { return (NativeFarCall*)nativeCall_at(instr); }
430 friend NativeFarCall* nativeFarCall_overwriting_at(address instr, address destination = NULL)
431 { return (NativeFarCall*)nativeCall_overwriting_at(instr, destination); }
432 friend NativeFarCall* nativeFarCall_before(address return_address)
433 { return (NativeFarCall*)nativeCall_before(return_address); }
434 };
435
436 #else
437
438 // The format of this extended-range call is:
439 // jumpl_to addr, lreg
440 // == sethi %hi54(addr), O7 ; jumpl O7, %lo10(addr), O7 ; <delay>
441 // That is, it is essentially the same as a NativeJump.
442 class NativeFarCall;
443 inline NativeFarCall* nativeFarCall_overwriting_at(address instr, address destination);
444 inline NativeFarCall* nativeFarCall_at(address instr);
445 class NativeFarCall: public NativeInstruction {
446 public:
447 enum Sparc_specific_constants {
448 // instruction_size includes the delay slot instruction.
449 instruction_size = 9 * BytesPerInstWord,
450 return_address_offset = 9 * BytesPerInstWord,
451 jmpl_offset = 7 * BytesPerInstWord,
452 displacement_offset = 0,
453 instruction_offset = 0
454 };
455 address instruction_address() const { return addr_at(0); }
456 address next_instruction_address() const { return addr_at(instruction_size); }
457 address return_address() const { return addr_at(return_address_offset); }
458
459 address destination() const {
460 return (address) data64(addr_at(0), long_at(jmpl_offset));
461 }
462 address displacement_address() const { return addr_at(displacement_offset); }
463 void set_destination(address dest);
464
465 bool destination_is_compiled_verified_entry_point();
466
467 void verify();
468 void print();
469
470 // unit test stuff
471 static void test();
472
473 // Creation
474 friend inline NativeFarCall* nativeFarCall_at(address instr) {
475 NativeFarCall* call = (NativeFarCall*)instr;
476 #ifdef ASSERT
477 call->verify();
478 #endif
479 return call;
480 }
481
482 friend inline NativeFarCall* nativeFarCall_overwriting_at(address instr, address destination = NULL) {
483 Unimplemented();
484 NativeFarCall* call = (NativeFarCall*)instr;
485 return call;
486 }
487
488 friend NativeFarCall* nativeFarCall_before(address return_address) {
489 NativeFarCall* call = (NativeFarCall*)(return_address - return_address_offset);
490 #ifdef ASSERT
491 call->verify();
492 #endif
493 return call;
494 }
495
496 static bool is_call_at(address instr);
497
498 // MT-safe patching of a call instruction.
499 static void insert(address code_pos, address entry) {
500 (void)nativeFarCall_overwriting_at(code_pos, entry);
501 }
502 static void replace_mt_safe(address instr_addr, address code_buffer);
503 };
504
505 #endif // _LP64
506
507 // An interface for accessing/manipulating native set_metadata imm, reg instructions.
508 // (used to manipulate inlined data references, etc.)
509 // set_metadata imm, reg
510 // == sethi %hi22(imm), reg ; add reg, %lo10(imm), reg
511 class NativeMovConstReg;
512 inline NativeMovConstReg* nativeMovConstReg_at(address address);
513 class NativeMovConstReg: public NativeInstruction {
514 public:
515 enum Sparc_specific_constants {
516 sethi_offset = 0,
517 #ifdef _LP64
518 add_offset = 7 * BytesPerInstWord,
519 instruction_size = 8 * BytesPerInstWord
520 #else
521 add_offset = 4,
522 instruction_size = 8
523 #endif
524 };
525
526 address instruction_address() const { return addr_at(0); }
527 address next_instruction_address() const { return addr_at(instruction_size); }
528
529 // (The [set_]data accessor respects oop_type relocs also.)
530 intptr_t data() const;
531 void set_data(intptr_t x);
532
533 // report the destination register
534 Register destination() { return inv_rd(long_at(sethi_offset)); }
535
536 void verify();
537 void print();
538
539 // unit test stuff
540 static void test();
541
542 // Creation
543 friend inline NativeMovConstReg* nativeMovConstReg_at(address address) {
544 NativeMovConstReg* test = (NativeMovConstReg*)address;
545 #ifdef ASSERT
546 test->verify();
547 #endif
548 return test;
549 }
550
551
552 friend NativeMovConstReg* nativeMovConstReg_before(address address) {
553 NativeMovConstReg* test = (NativeMovConstReg*)(address - instruction_size);
554 #ifdef ASSERT
555 test->verify();
556 #endif
557 return test;
558 }
559
560 };
561
562
563 // An interface for accessing/manipulating native set_metadata imm, reg instructions.
564 // (used to manipulate inlined data references, etc.)
565 // set_metadata imm, reg
566 // == sethi %hi22(imm), reg; nop; add reg, %lo10(imm), reg
567 //
568 // Note that it is identical to NativeMovConstReg with the exception of a nop between the
569 // sethi and the add. The nop is required to be in the delay slot of the call instruction
570 // which overwrites the sethi during patching.
571 class NativeMovConstRegPatching;
572 inline NativeMovConstRegPatching* nativeMovConstRegPatching_at(address address);class NativeMovConstRegPatching: public NativeInstruction {
573 public:
574 enum Sparc_specific_constants {
575 sethi_offset = 0,
576 #ifdef _LP64
577 nop_offset = 7 * BytesPerInstWord,
578 #else
579 nop_offset = sethi_offset + BytesPerInstWord,
580 #endif
581 add_offset = nop_offset + BytesPerInstWord,
582 instruction_size = add_offset + BytesPerInstWord
583 };
584
585 address instruction_address() const { return addr_at(0); }
586 address next_instruction_address() const { return addr_at(instruction_size); }
587
588 // (The [set_]data accessor respects oop_type relocs also.)
589 int data() const;
590 void set_data(int x);
591
592 // report the destination register
593 Register destination() { return inv_rd(long_at(sethi_offset)); }
594
595 void verify();
596 void print();
597
598 // unit test stuff
599 static void test();
600
601 // Creation
602 friend inline NativeMovConstRegPatching* nativeMovConstRegPatching_at(address address) {
603 NativeMovConstRegPatching* test = (NativeMovConstRegPatching*)address;
604 #ifdef ASSERT
605 test->verify();
606 #endif
607 return test;
608 }
609
610
611 friend NativeMovConstRegPatching* nativeMovConstRegPatching_before(address address) {
612 NativeMovConstRegPatching* test = (NativeMovConstRegPatching*)(address - instruction_size);
613 #ifdef ASSERT
614 test->verify();
615 #endif
616 return test;
617 }
618
619 };
620
621
622 // An interface for accessing/manipulating native memory ops
623 // ld* [reg + offset], reg
624 // st* reg, [reg + offset]
625 // sethi %hi(imm), reg; add reg, %lo(imm), reg; ld* [reg1 + reg], reg2
626 // sethi %hi(imm), reg; add reg, %lo(imm), reg; st* reg2, [reg1 + reg]
627 // Ops covered: {lds,ldu,st}{w,b,h}, {ld,st}{d,x}
628 //
629 class NativeMovRegMem;
630 inline NativeMovRegMem* nativeMovRegMem_at (address address);
631 class NativeMovRegMem: public NativeInstruction {
632 public:
633 enum Sparc_specific_constants {
634 op3_mask_ld = 1 << Assembler::lduw_op3 |
635 1 << Assembler::ldub_op3 |
636 1 << Assembler::lduh_op3 |
637 1 << Assembler::ldd_op3 |
638 1 << Assembler::ldsw_op3 |
639 1 << Assembler::ldsb_op3 |
640 1 << Assembler::ldsh_op3 |
641 1 << Assembler::ldx_op3,
642 op3_mask_st = 1 << Assembler::stw_op3 |
643 1 << Assembler::stb_op3 |
644 1 << Assembler::sth_op3 |
645 1 << Assembler::std_op3 |
646 1 << Assembler::stx_op3,
647 op3_ldst_int_limit = Assembler::ldf_op3,
648 op3_mask_ldf = 1 << (Assembler::ldf_op3 - op3_ldst_int_limit) |
649 1 << (Assembler::lddf_op3 - op3_ldst_int_limit),
650 op3_mask_stf = 1 << (Assembler::stf_op3 - op3_ldst_int_limit) |
651 1 << (Assembler::stdf_op3 - op3_ldst_int_limit),
652
653 offset_width = 13,
654 sethi_offset = 0,
655 #ifdef _LP64
656 add_offset = 7 * BytesPerInstWord,
657 #else
658 add_offset = 4,
659 #endif
660 ldst_offset = add_offset + BytesPerInstWord
661 };
662 bool is_immediate() const {
663 // check if instruction is ld* [reg + offset], reg or st* reg, [reg + offset]
664 int i0 = long_at(0);
665 return (is_op(i0, Assembler::ldst_op));
666 }
667
668 address instruction_address() const { return addr_at(0); }
669 address next_instruction_address() const {
670 #ifdef _LP64
671 return addr_at(is_immediate() ? 4 : (7 * BytesPerInstWord));
672 #else
673 return addr_at(is_immediate() ? 4 : 12);
674 #endif
675 }
676 intptr_t offset() const {
677 return is_immediate()? inv_simm(long_at(0), offset_width) :
678 nativeMovConstReg_at(addr_at(0))->data();
679 }
680 void set_offset(intptr_t x) {
681 if (is_immediate()) {
682 guarantee(fits_in_simm(x, offset_width), "data block offset overflow");
683 set_long_at(0, set_simm(long_at(0), x, offset_width));
684 } else
685 nativeMovConstReg_at(addr_at(0))->set_data(x);
686 }
687
688 void add_offset_in_bytes(intptr_t radd_offset) {
689 set_offset (offset() + radd_offset);
690 }
691
692 void copy_instruction_to(address new_instruction_address);
693
694 void verify();
695 void print ();
696
697 // unit test stuff
698 static void test();
699
700 private:
701 friend inline NativeMovRegMem* nativeMovRegMem_at (address address) {
702 NativeMovRegMem* test = (NativeMovRegMem*)address;
703 #ifdef ASSERT
704 test->verify();
705 #endif
706 return test;
707 }
708 };
709
710
711 // An interface for accessing/manipulating native jumps
712 // jump_to addr
713 // == sethi %hi22(addr), temp ; jumpl reg, %lo10(addr), G0 ; <delay>
714 // jumpl_to addr, lreg
715 // == sethi %hi22(addr), temp ; jumpl reg, %lo10(addr), lreg ; <delay>
716 class NativeJump;
717 inline NativeJump* nativeJump_at(address address);
718 class NativeJump: public NativeInstruction {
719 private:
720 void guarantee_displacement(int disp, int width) {
721 guarantee(fits_in_simm(disp, width + 2), "branch displacement overflow");
722 }
723
724 public:
725 enum Sparc_specific_constants {
726 sethi_offset = 0,
727 #ifdef _LP64
728 jmpl_offset = 7 * BytesPerInstWord,
729 instruction_size = 9 * BytesPerInstWord // includes delay slot
730 #else
731 jmpl_offset = 1 * BytesPerInstWord,
732 instruction_size = 3 * BytesPerInstWord // includes delay slot
733 #endif
734 };
735
736 address instruction_address() const { return addr_at(0); }
737 address next_instruction_address() const { return addr_at(instruction_size); }
738
739 #ifdef _LP64
740 address jump_destination() const {
741 return (address) data64(instruction_address(), long_at(jmpl_offset));
742 }
743 void set_jump_destination(address dest) {
744 set_data64_sethi( instruction_address(), (intptr_t)dest);
745 set_long_at(jmpl_offset, set_data32_simm13( long_at(jmpl_offset), (intptr_t)dest));
746 }
747 #else
748 address jump_destination() const {
749 return (address) data32(long_at(sethi_offset), long_at(jmpl_offset));
750 }
751 void set_jump_destination(address dest) {
752 set_long_at(sethi_offset, set_data32_sethi( long_at(sethi_offset), (intptr_t)dest));
753 set_long_at(jmpl_offset, set_data32_simm13( long_at(jmpl_offset), (intptr_t)dest));
754 }
755 #endif
756
757 // Creation
758 friend inline NativeJump* nativeJump_at(address address) {
759 NativeJump* jump = (NativeJump*)address;
760 #ifdef ASSERT
761 jump->verify();
762 #endif
763 return jump;
764 }
765
766 void verify();
767 void print();
768
769 // Unit testing stuff
770 static void test();
771
772 // Insertion of native jump instruction
773 static void insert(address code_pos, address entry);
774 // MT-safe insertion of native jump at verified method entry
775 static void check_verified_entry_alignment(address entry, address verified_entry) {
776 // nothing to do for sparc.
777 }
778 static void patch_verified_entry(address entry, address verified_entry, address dest);
779 };
780
781
782
783 // Despite the name, handles only simple branches.
784 class NativeGeneralJump;
785 inline NativeGeneralJump* nativeGeneralJump_at(address address);
786 class NativeGeneralJump: public NativeInstruction {
787 public:
788 enum Sparc_specific_constants {
789 instruction_size = 8
790 };
791
792 address instruction_address() const { return addr_at(0); }
793 address jump_destination() const { return addr_at(0) + branch_destination_offset(long_at(0)); }
794 void set_jump_destination(address dest) {
795 int patched_instr = patch_branch_destination_offset(dest - addr_at(0), long_at(0));
796 set_long_at(0, patched_instr);
797 }
798 NativeInstruction *delay_slot_instr() { return nativeInstruction_at(addr_at(4));}
799 void fill_delay_slot(int instr) { set_long_at(4, instr);}
800 Assembler::Condition condition() {
801 int x = long_at(0);
802 return (Assembler::Condition) Assembler::inv_cond(x);
803 }
804
805 // Creation
806 friend inline NativeGeneralJump* nativeGeneralJump_at(address address) {
807 NativeGeneralJump* jump = (NativeGeneralJump*)(address);
808 #ifdef ASSERT
809 jump->verify();
810 #endif
811 return jump;
812 }
813
814 // Insertion of native general jump instruction
815 static void insert_unconditional(address code_pos, address entry);
816 static void replace_mt_safe(address instr_addr, address code_buffer);
817
818 void verify();
819 };
820
821
822 class NativeIllegalInstruction: public NativeInstruction {
823 public:
824 enum Sparc_specific_constants {
825 instruction_size = 4
826 };
827
828 // Insert illegal opcode as specific address
829 static void insert(address code_pos);
830 };
831
832 #endif // CPU_SPARC_VM_NATIVEINST_SPARC_HPP