src/cpu/ppc/vm/sharedRuntime_ppc.cpp

Thu, 06 Mar 2014 10:55:28 -0800

author
goetz
date
Thu, 06 Mar 2014 10:55:28 -0800
changeset 6511
31e80afe3fed
parent 6495
67fa91961822
child 6512
fd1b9f02cc91
permissions
-rw-r--r--

8035647: PPC64: Support for elf v2 abi.
Summary: ELFv2 ABI used by the little endian PowerPC64 on Linux.
Reviewed-by: kvn
Contributed-by: asmundak@google.com

goetz@6458 1 /*
goetz@6458 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
goetz@6458 3 * Copyright 2012, 2013 SAP AG. All rights reserved.
goetz@6458 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
goetz@6458 5 *
goetz@6458 6 * This code is free software; you can redistribute it and/or modify it
goetz@6458 7 * under the terms of the GNU General Public License version 2 only, as
goetz@6458 8 * published by the Free Software Foundation.
goetz@6458 9 *
goetz@6458 10 * This code is distributed in the hope that it will be useful, but WITHOUT
goetz@6458 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
goetz@6458 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
goetz@6458 13 * version 2 for more details (a copy is included in the LICENSE file that
goetz@6458 14 * accompanied this code).
goetz@6458 15 *
goetz@6458 16 * You should have received a copy of the GNU General Public License version
goetz@6458 17 * 2 along with this work; if not, write to the Free Software Foundation,
goetz@6458 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
goetz@6458 19 *
goetz@6458 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
goetz@6458 21 * or visit www.oracle.com if you need additional information or have any
goetz@6458 22 * questions.
goetz@6458 23 *
goetz@6458 24 */
goetz@6458 25
goetz@6458 26 #include "precompiled.hpp"
goetz@6458 27 #include "asm/macroAssembler.inline.hpp"
goetz@6458 28 #include "code/debugInfoRec.hpp"
goetz@6458 29 #include "code/icBuffer.hpp"
goetz@6458 30 #include "code/vtableStubs.hpp"
goetz@6458 31 #include "interpreter/interpreter.hpp"
goetz@6458 32 #include "oops/compiledICHolder.hpp"
goetz@6458 33 #include "prims/jvmtiRedefineClassesTrace.hpp"
goetz@6458 34 #include "runtime/sharedRuntime.hpp"
goetz@6458 35 #include "runtime/vframeArray.hpp"
goetz@6458 36 #include "vmreg_ppc.inline.hpp"
goetz@6458 37 #ifdef COMPILER1
goetz@6458 38 #include "c1/c1_Runtime1.hpp"
goetz@6458 39 #endif
goetz@6458 40 #ifdef COMPILER2
goetz@6458 41 #include "opto/runtime.hpp"
goetz@6458 42 #endif
goetz@6458 43
goetz@6458 44 #define __ masm->
goetz@6458 45
goetz@6458 46 #ifdef PRODUCT
goetz@6458 47 #define BLOCK_COMMENT(str) // nothing
goetz@6458 48 #else
goetz@6458 49 #define BLOCK_COMMENT(str) __ block_comment(str)
goetz@6458 50 #endif
goetz@6458 51
goetz@6458 52 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":")
goetz@6458 53
goetz@6458 54
goetz@6458 55 // Used by generate_deopt_blob. Defined in .ad file.
goetz@6458 56 extern uint size_deopt_handler();
goetz@6458 57
goetz@6458 58
goetz@6458 59 class RegisterSaver {
goetz@6458 60 // Used for saving volatile registers.
goetz@6458 61 public:
goetz@6458 62
goetz@6458 63 // Support different return pc locations.
goetz@6458 64 enum ReturnPCLocation {
goetz@6458 65 return_pc_is_lr,
goetz@6458 66 return_pc_is_r4,
goetz@6458 67 return_pc_is_thread_saved_exception_pc
goetz@6458 68 };
goetz@6458 69
goetz@6511 70 static OopMap* push_frame_reg_args_and_save_live_registers(MacroAssembler* masm,
goetz@6458 71 int* out_frame_size_in_bytes,
goetz@6458 72 bool generate_oop_map,
goetz@6458 73 int return_pc_adjustment,
goetz@6458 74 ReturnPCLocation return_pc_location);
goetz@6458 75 static void restore_live_registers_and_pop_frame(MacroAssembler* masm,
goetz@6458 76 int frame_size_in_bytes,
goetz@6458 77 bool restore_ctr);
goetz@6458 78
goetz@6458 79 static void push_frame_and_save_argument_registers(MacroAssembler* masm,
goetz@6458 80 Register r_temp,
goetz@6458 81 int frame_size,
goetz@6458 82 int total_args,
goetz@6458 83 const VMRegPair *regs, const VMRegPair *regs2 = NULL);
goetz@6458 84 static void restore_argument_registers_and_pop_frame(MacroAssembler*masm,
goetz@6458 85 int frame_size,
goetz@6458 86 int total_args,
goetz@6458 87 const VMRegPair *regs, const VMRegPair *regs2 = NULL);
goetz@6458 88
goetz@6458 89 // During deoptimization only the result registers need to be restored
goetz@6458 90 // all the other values have already been extracted.
goetz@6458 91 static void restore_result_registers(MacroAssembler* masm, int frame_size_in_bytes);
goetz@6458 92
goetz@6458 93 // Constants and data structures:
goetz@6458 94
goetz@6458 95 typedef enum {
goetz@6458 96 int_reg = 0,
goetz@6458 97 float_reg = 1,
goetz@6458 98 special_reg = 2
goetz@6458 99 } RegisterType;
goetz@6458 100
goetz@6458 101 typedef enum {
goetz@6458 102 reg_size = 8,
goetz@6458 103 half_reg_size = reg_size / 2,
goetz@6458 104 } RegisterConstants;
goetz@6458 105
goetz@6458 106 typedef struct {
goetz@6458 107 RegisterType reg_type;
goetz@6458 108 int reg_num;
goetz@6458 109 VMReg vmreg;
goetz@6458 110 } LiveRegType;
goetz@6458 111 };
goetz@6458 112
goetz@6458 113
goetz@6458 114 #define RegisterSaver_LiveSpecialReg(regname) \
goetz@6458 115 { RegisterSaver::special_reg, regname->encoding(), regname->as_VMReg() }
goetz@6458 116
goetz@6458 117 #define RegisterSaver_LiveIntReg(regname) \
goetz@6458 118 { RegisterSaver::int_reg, regname->encoding(), regname->as_VMReg() }
goetz@6458 119
goetz@6458 120 #define RegisterSaver_LiveFloatReg(regname) \
goetz@6458 121 { RegisterSaver::float_reg, regname->encoding(), regname->as_VMReg() }
goetz@6458 122
goetz@6458 123 static const RegisterSaver::LiveRegType RegisterSaver_LiveRegs[] = {
goetz@6458 124 // Live registers which get spilled to the stack. Register
goetz@6458 125 // positions in this array correspond directly to the stack layout.
goetz@6458 126
goetz@6458 127 //
goetz@6458 128 // live special registers:
goetz@6458 129 //
goetz@6458 130 RegisterSaver_LiveSpecialReg(SR_CTR),
goetz@6458 131 //
goetz@6458 132 // live float registers:
goetz@6458 133 //
goetz@6458 134 RegisterSaver_LiveFloatReg( F0 ),
goetz@6458 135 RegisterSaver_LiveFloatReg( F1 ),
goetz@6458 136 RegisterSaver_LiveFloatReg( F2 ),
goetz@6458 137 RegisterSaver_LiveFloatReg( F3 ),
goetz@6458 138 RegisterSaver_LiveFloatReg( F4 ),
goetz@6458 139 RegisterSaver_LiveFloatReg( F5 ),
goetz@6458 140 RegisterSaver_LiveFloatReg( F6 ),
goetz@6458 141 RegisterSaver_LiveFloatReg( F7 ),
goetz@6458 142 RegisterSaver_LiveFloatReg( F8 ),
goetz@6458 143 RegisterSaver_LiveFloatReg( F9 ),
goetz@6458 144 RegisterSaver_LiveFloatReg( F10 ),
goetz@6458 145 RegisterSaver_LiveFloatReg( F11 ),
goetz@6458 146 RegisterSaver_LiveFloatReg( F12 ),
goetz@6458 147 RegisterSaver_LiveFloatReg( F13 ),
goetz@6458 148 RegisterSaver_LiveFloatReg( F14 ),
goetz@6458 149 RegisterSaver_LiveFloatReg( F15 ),
goetz@6458 150 RegisterSaver_LiveFloatReg( F16 ),
goetz@6458 151 RegisterSaver_LiveFloatReg( F17 ),
goetz@6458 152 RegisterSaver_LiveFloatReg( F18 ),
goetz@6458 153 RegisterSaver_LiveFloatReg( F19 ),
goetz@6458 154 RegisterSaver_LiveFloatReg( F20 ),
goetz@6458 155 RegisterSaver_LiveFloatReg( F21 ),
goetz@6458 156 RegisterSaver_LiveFloatReg( F22 ),
goetz@6458 157 RegisterSaver_LiveFloatReg( F23 ),
goetz@6458 158 RegisterSaver_LiveFloatReg( F24 ),
goetz@6458 159 RegisterSaver_LiveFloatReg( F25 ),
goetz@6458 160 RegisterSaver_LiveFloatReg( F26 ),
goetz@6458 161 RegisterSaver_LiveFloatReg( F27 ),
goetz@6458 162 RegisterSaver_LiveFloatReg( F28 ),
goetz@6458 163 RegisterSaver_LiveFloatReg( F29 ),
goetz@6458 164 RegisterSaver_LiveFloatReg( F30 ),
goetz@6458 165 RegisterSaver_LiveFloatReg( F31 ),
goetz@6458 166 //
goetz@6458 167 // live integer registers:
goetz@6458 168 //
goetz@6458 169 RegisterSaver_LiveIntReg( R0 ),
goetz@6458 170 //RegisterSaver_LiveIntReg( R1 ), // stack pointer
goetz@6458 171 RegisterSaver_LiveIntReg( R2 ),
goetz@6458 172 RegisterSaver_LiveIntReg( R3 ),
goetz@6458 173 RegisterSaver_LiveIntReg( R4 ),
goetz@6458 174 RegisterSaver_LiveIntReg( R5 ),
goetz@6458 175 RegisterSaver_LiveIntReg( R6 ),
goetz@6458 176 RegisterSaver_LiveIntReg( R7 ),
goetz@6458 177 RegisterSaver_LiveIntReg( R8 ),
goetz@6458 178 RegisterSaver_LiveIntReg( R9 ),
goetz@6458 179 RegisterSaver_LiveIntReg( R10 ),
goetz@6458 180 RegisterSaver_LiveIntReg( R11 ),
goetz@6458 181 RegisterSaver_LiveIntReg( R12 ),
goetz@6458 182 //RegisterSaver_LiveIntReg( R13 ), // system thread id
goetz@6458 183 RegisterSaver_LiveIntReg( R14 ),
goetz@6458 184 RegisterSaver_LiveIntReg( R15 ),
goetz@6458 185 RegisterSaver_LiveIntReg( R16 ),
goetz@6458 186 RegisterSaver_LiveIntReg( R17 ),
goetz@6458 187 RegisterSaver_LiveIntReg( R18 ),
goetz@6458 188 RegisterSaver_LiveIntReg( R19 ),
goetz@6458 189 RegisterSaver_LiveIntReg( R20 ),
goetz@6458 190 RegisterSaver_LiveIntReg( R21 ),
goetz@6458 191 RegisterSaver_LiveIntReg( R22 ),
goetz@6458 192 RegisterSaver_LiveIntReg( R23 ),
goetz@6458 193 RegisterSaver_LiveIntReg( R24 ),
goetz@6458 194 RegisterSaver_LiveIntReg( R25 ),
goetz@6458 195 RegisterSaver_LiveIntReg( R26 ),
goetz@6458 196 RegisterSaver_LiveIntReg( R27 ),
goetz@6458 197 RegisterSaver_LiveIntReg( R28 ),
goetz@6458 198 RegisterSaver_LiveIntReg( R29 ),
goetz@6458 199 RegisterSaver_LiveIntReg( R31 ),
goetz@6458 200 RegisterSaver_LiveIntReg( R30 ), // r30 must be the last register
goetz@6458 201 };
goetz@6458 202
goetz@6511 203 OopMap* RegisterSaver::push_frame_reg_args_and_save_live_registers(MacroAssembler* masm,
goetz@6458 204 int* out_frame_size_in_bytes,
goetz@6458 205 bool generate_oop_map,
goetz@6458 206 int return_pc_adjustment,
goetz@6458 207 ReturnPCLocation return_pc_location) {
goetz@6511 208 // Push an abi_reg_args-frame and store all registers which may be live.
goetz@6458 209 // If requested, create an OopMap: Record volatile registers as
goetz@6458 210 // callee-save values in an OopMap so their save locations will be
goetz@6458 211 // propagated to the RegisterMap of the caller frame during
goetz@6458 212 // StackFrameStream construction (needed for deoptimization; see
goetz@6458 213 // compiledVFrame::create_stack_value).
goetz@6458 214 // If return_pc_adjustment != 0 adjust the return pc by return_pc_adjustment.
goetz@6458 215
goetz@6458 216 int i;
goetz@6458 217 int offset;
goetz@6458 218
goetz@6458 219 // calcualte frame size
goetz@6458 220 const int regstosave_num = sizeof(RegisterSaver_LiveRegs) /
goetz@6458 221 sizeof(RegisterSaver::LiveRegType);
goetz@6458 222 const int register_save_size = regstosave_num * reg_size;
goetz@6458 223 const int frame_size_in_bytes = round_to(register_save_size, frame::alignment_in_bytes)
goetz@6511 224 + frame::abi_reg_args_size;
goetz@6458 225 *out_frame_size_in_bytes = frame_size_in_bytes;
goetz@6458 226 const int frame_size_in_slots = frame_size_in_bytes / sizeof(jint);
goetz@6458 227 const int register_save_offset = frame_size_in_bytes - register_save_size;
goetz@6458 228
goetz@6458 229 // OopMap frame size is in c2 stack slots (sizeof(jint)) not bytes or words.
goetz@6458 230 OopMap* map = generate_oop_map ? new OopMap(frame_size_in_slots, 0) : NULL;
goetz@6458 231
goetz@6511 232 BLOCK_COMMENT("push_frame_reg_args_and_save_live_registers {");
goetz@6458 233
goetz@6458 234 // Save r30 in the last slot of the not yet pushed frame so that we
goetz@6458 235 // can use it as scratch reg.
goetz@6458 236 __ std(R30, -reg_size, R1_SP);
goetz@6458 237 assert(-reg_size == register_save_offset - frame_size_in_bytes + ((regstosave_num-1)*reg_size),
goetz@6458 238 "consistency check");
goetz@6458 239
goetz@6458 240 // save the flags
goetz@6458 241 // Do the save_LR_CR by hand and adjust the return pc if requested.
goetz@6458 242 __ mfcr(R30);
goetz@6458 243 __ std(R30, _abi(cr), R1_SP);
goetz@6458 244 switch (return_pc_location) {
goetz@6458 245 case return_pc_is_lr: __ mflr(R30); break;
goetz@6458 246 case return_pc_is_r4: __ mr(R30, R4); break;
goetz@6458 247 case return_pc_is_thread_saved_exception_pc:
goetz@6458 248 __ ld(R30, thread_(saved_exception_pc)); break;
goetz@6458 249 default: ShouldNotReachHere();
goetz@6458 250 }
goetz@6458 251 if (return_pc_adjustment != 0)
goetz@6458 252 __ addi(R30, R30, return_pc_adjustment);
goetz@6458 253 __ std(R30, _abi(lr), R1_SP);
goetz@6458 254
goetz@6458 255 // push a new frame
goetz@6458 256 __ push_frame(frame_size_in_bytes, R30);
goetz@6458 257
goetz@6458 258 // save all registers (ints and floats)
goetz@6458 259 offset = register_save_offset;
goetz@6458 260 for (int i = 0; i < regstosave_num; i++) {
goetz@6458 261 int reg_num = RegisterSaver_LiveRegs[i].reg_num;
goetz@6458 262 int reg_type = RegisterSaver_LiveRegs[i].reg_type;
goetz@6458 263
goetz@6458 264 switch (reg_type) {
goetz@6458 265 case RegisterSaver::int_reg: {
goetz@6458 266 if (reg_num != 30) { // We spilled R30 right at the beginning.
goetz@6458 267 __ std(as_Register(reg_num), offset, R1_SP);
goetz@6458 268 }
goetz@6458 269 break;
goetz@6458 270 }
goetz@6458 271 case RegisterSaver::float_reg: {
goetz@6458 272 __ stfd(as_FloatRegister(reg_num), offset, R1_SP);
goetz@6458 273 break;
goetz@6458 274 }
goetz@6458 275 case RegisterSaver::special_reg: {
goetz@6458 276 if (reg_num == SR_CTR_SpecialRegisterEnumValue) {
goetz@6458 277 __ mfctr(R30);
goetz@6458 278 __ std(R30, offset, R1_SP);
goetz@6458 279 } else {
goetz@6458 280 Unimplemented();
goetz@6458 281 }
goetz@6458 282 break;
goetz@6458 283 }
goetz@6458 284 default:
goetz@6458 285 ShouldNotReachHere();
goetz@6458 286 }
goetz@6458 287
goetz@6458 288 if (generate_oop_map) {
goetz@6458 289 map->set_callee_saved(VMRegImpl::stack2reg(offset>>2),
goetz@6458 290 RegisterSaver_LiveRegs[i].vmreg);
goetz@6458 291 map->set_callee_saved(VMRegImpl::stack2reg((offset + half_reg_size)>>2),
goetz@6458 292 RegisterSaver_LiveRegs[i].vmreg->next());
goetz@6458 293 }
goetz@6458 294 offset += reg_size;
goetz@6458 295 }
goetz@6458 296
goetz@6511 297 BLOCK_COMMENT("} push_frame_reg_args_and_save_live_registers");
goetz@6458 298
goetz@6458 299 // And we're done.
goetz@6458 300 return map;
goetz@6458 301 }
goetz@6458 302
goetz@6458 303
goetz@6458 304 // Pop the current frame and restore all the registers that we
goetz@6458 305 // saved.
goetz@6458 306 void RegisterSaver::restore_live_registers_and_pop_frame(MacroAssembler* masm,
goetz@6458 307 int frame_size_in_bytes,
goetz@6458 308 bool restore_ctr) {
goetz@6458 309 int i;
goetz@6458 310 int offset;
goetz@6458 311 const int regstosave_num = sizeof(RegisterSaver_LiveRegs) /
goetz@6458 312 sizeof(RegisterSaver::LiveRegType);
goetz@6458 313 const int register_save_size = regstosave_num * reg_size;
goetz@6458 314 const int register_save_offset = frame_size_in_bytes - register_save_size;
goetz@6458 315
goetz@6458 316 BLOCK_COMMENT("restore_live_registers_and_pop_frame {");
goetz@6458 317
goetz@6458 318 // restore all registers (ints and floats)
goetz@6458 319 offset = register_save_offset;
goetz@6458 320 for (int i = 0; i < regstosave_num; i++) {
goetz@6458 321 int reg_num = RegisterSaver_LiveRegs[i].reg_num;
goetz@6458 322 int reg_type = RegisterSaver_LiveRegs[i].reg_type;
goetz@6458 323
goetz@6458 324 switch (reg_type) {
goetz@6458 325 case RegisterSaver::int_reg: {
goetz@6458 326 if (reg_num != 30) // R30 restored at the end, it's the tmp reg!
goetz@6458 327 __ ld(as_Register(reg_num), offset, R1_SP);
goetz@6458 328 break;
goetz@6458 329 }
goetz@6458 330 case RegisterSaver::float_reg: {
goetz@6458 331 __ lfd(as_FloatRegister(reg_num), offset, R1_SP);
goetz@6458 332 break;
goetz@6458 333 }
goetz@6458 334 case RegisterSaver::special_reg: {
goetz@6458 335 if (reg_num == SR_CTR_SpecialRegisterEnumValue) {
goetz@6458 336 if (restore_ctr) { // Nothing to do here if ctr already contains the next address.
goetz@6458 337 __ ld(R30, offset, R1_SP);
goetz@6458 338 __ mtctr(R30);
goetz@6458 339 }
goetz@6458 340 } else {
goetz@6458 341 Unimplemented();
goetz@6458 342 }
goetz@6458 343 break;
goetz@6458 344 }
goetz@6458 345 default:
goetz@6458 346 ShouldNotReachHere();
goetz@6458 347 }
goetz@6458 348 offset += reg_size;
goetz@6458 349 }
goetz@6458 350
goetz@6458 351 // pop the frame
goetz@6458 352 __ pop_frame();
goetz@6458 353
goetz@6458 354 // restore the flags
goetz@6458 355 __ restore_LR_CR(R30);
goetz@6458 356
goetz@6458 357 // restore scratch register's value
goetz@6458 358 __ ld(R30, -reg_size, R1_SP);
goetz@6458 359
goetz@6458 360 BLOCK_COMMENT("} restore_live_registers_and_pop_frame");
goetz@6458 361 }
goetz@6458 362
goetz@6458 363 void RegisterSaver::push_frame_and_save_argument_registers(MacroAssembler* masm, Register r_temp,
goetz@6458 364 int frame_size,int total_args, const VMRegPair *regs,
goetz@6458 365 const VMRegPair *regs2) {
goetz@6458 366 __ push_frame(frame_size, r_temp);
goetz@6458 367 int st_off = frame_size - wordSize;
goetz@6458 368 for (int i = 0; i < total_args; i++) {
goetz@6458 369 VMReg r_1 = regs[i].first();
goetz@6458 370 VMReg r_2 = regs[i].second();
goetz@6458 371 if (!r_1->is_valid()) {
goetz@6458 372 assert(!r_2->is_valid(), "");
goetz@6458 373 continue;
goetz@6458 374 }
goetz@6458 375 if (r_1->is_Register()) {
goetz@6458 376 Register r = r_1->as_Register();
goetz@6458 377 __ std(r, st_off, R1_SP);
goetz@6458 378 st_off -= wordSize;
goetz@6458 379 } else if (r_1->is_FloatRegister()) {
goetz@6458 380 FloatRegister f = r_1->as_FloatRegister();
goetz@6458 381 __ stfd(f, st_off, R1_SP);
goetz@6458 382 st_off -= wordSize;
goetz@6458 383 }
goetz@6458 384 }
goetz@6458 385 if (regs2 != NULL) {
goetz@6458 386 for (int i = 0; i < total_args; i++) {
goetz@6458 387 VMReg r_1 = regs2[i].first();
goetz@6458 388 VMReg r_2 = regs2[i].second();
goetz@6458 389 if (!r_1->is_valid()) {
goetz@6458 390 assert(!r_2->is_valid(), "");
goetz@6458 391 continue;
goetz@6458 392 }
goetz@6458 393 if (r_1->is_Register()) {
goetz@6458 394 Register r = r_1->as_Register();
goetz@6458 395 __ std(r, st_off, R1_SP);
goetz@6458 396 st_off -= wordSize;
goetz@6458 397 } else if (r_1->is_FloatRegister()) {
goetz@6458 398 FloatRegister f = r_1->as_FloatRegister();
goetz@6458 399 __ stfd(f, st_off, R1_SP);
goetz@6458 400 st_off -= wordSize;
goetz@6458 401 }
goetz@6458 402 }
goetz@6458 403 }
goetz@6458 404 }
goetz@6458 405
goetz@6458 406 void RegisterSaver::restore_argument_registers_and_pop_frame(MacroAssembler*masm, int frame_size,
goetz@6458 407 int total_args, const VMRegPair *regs,
goetz@6458 408 const VMRegPair *regs2) {
goetz@6458 409 int st_off = frame_size - wordSize;
goetz@6458 410 for (int i = 0; i < total_args; i++) {
goetz@6458 411 VMReg r_1 = regs[i].first();
goetz@6458 412 VMReg r_2 = regs[i].second();
goetz@6458 413 if (r_1->is_Register()) {
goetz@6458 414 Register r = r_1->as_Register();
goetz@6458 415 __ ld(r, st_off, R1_SP);
goetz@6458 416 st_off -= wordSize;
goetz@6458 417 } else if (r_1->is_FloatRegister()) {
goetz@6458 418 FloatRegister f = r_1->as_FloatRegister();
goetz@6458 419 __ lfd(f, st_off, R1_SP);
goetz@6458 420 st_off -= wordSize;
goetz@6458 421 }
goetz@6458 422 }
goetz@6458 423 if (regs2 != NULL)
goetz@6458 424 for (int i = 0; i < total_args; i++) {
goetz@6458 425 VMReg r_1 = regs2[i].first();
goetz@6458 426 VMReg r_2 = regs2[i].second();
goetz@6458 427 if (r_1->is_Register()) {
goetz@6458 428 Register r = r_1->as_Register();
goetz@6458 429 __ ld(r, st_off, R1_SP);
goetz@6458 430 st_off -= wordSize;
goetz@6458 431 } else if (r_1->is_FloatRegister()) {
goetz@6458 432 FloatRegister f = r_1->as_FloatRegister();
goetz@6458 433 __ lfd(f, st_off, R1_SP);
goetz@6458 434 st_off -= wordSize;
goetz@6458 435 }
goetz@6458 436 }
goetz@6458 437 __ pop_frame();
goetz@6458 438 }
goetz@6458 439
goetz@6458 440 // Restore the registers that might be holding a result.
goetz@6458 441 void RegisterSaver::restore_result_registers(MacroAssembler* masm, int frame_size_in_bytes) {
goetz@6458 442 int i;
goetz@6458 443 int offset;
goetz@6458 444 const int regstosave_num = sizeof(RegisterSaver_LiveRegs) /
goetz@6458 445 sizeof(RegisterSaver::LiveRegType);
goetz@6458 446 const int register_save_size = regstosave_num * reg_size;
goetz@6458 447 const int register_save_offset = frame_size_in_bytes - register_save_size;
goetz@6458 448
goetz@6458 449 // restore all result registers (ints and floats)
goetz@6458 450 offset = register_save_offset;
goetz@6458 451 for (int i = 0; i < regstosave_num; i++) {
goetz@6458 452 int reg_num = RegisterSaver_LiveRegs[i].reg_num;
goetz@6458 453 int reg_type = RegisterSaver_LiveRegs[i].reg_type;
goetz@6458 454 switch (reg_type) {
goetz@6458 455 case RegisterSaver::int_reg: {
goetz@6458 456 if (as_Register(reg_num)==R3_RET) // int result_reg
goetz@6458 457 __ ld(as_Register(reg_num), offset, R1_SP);
goetz@6458 458 break;
goetz@6458 459 }
goetz@6458 460 case RegisterSaver::float_reg: {
goetz@6458 461 if (as_FloatRegister(reg_num)==F1_RET) // float result_reg
goetz@6458 462 __ lfd(as_FloatRegister(reg_num), offset, R1_SP);
goetz@6458 463 break;
goetz@6458 464 }
goetz@6458 465 case RegisterSaver::special_reg: {
goetz@6458 466 // Special registers don't hold a result.
goetz@6458 467 break;
goetz@6458 468 }
goetz@6458 469 default:
goetz@6458 470 ShouldNotReachHere();
goetz@6458 471 }
goetz@6458 472 offset += reg_size;
goetz@6458 473 }
goetz@6458 474 }
goetz@6458 475
goetz@6458 476 // Is vector's size (in bytes) bigger than a size saved by default?
goetz@6458 477 bool SharedRuntime::is_wide_vector(int size) {
goetz@6458 478 ResourceMark rm;
goetz@6458 479 // Note, MaxVectorSize == 8 on PPC64.
goetz@6458 480 assert(size <= 8, err_msg_res("%d bytes vectors are not supported", size));
goetz@6458 481 return size > 8;
goetz@6458 482 }
goetz@6458 483 #ifdef COMPILER2
goetz@6458 484 static int reg2slot(VMReg r) {
goetz@6458 485 return r->reg2stack() + SharedRuntime::out_preserve_stack_slots();
goetz@6458 486 }
goetz@6458 487
goetz@6458 488 static int reg2offset(VMReg r) {
goetz@6458 489 return (r->reg2stack() + SharedRuntime::out_preserve_stack_slots()) * VMRegImpl::stack_slot_size;
goetz@6458 490 }
goetz@6458 491 #endif
goetz@6458 492
goetz@6458 493 // ---------------------------------------------------------------------------
goetz@6458 494 // Read the array of BasicTypes from a signature, and compute where the
goetz@6458 495 // arguments should go. Values in the VMRegPair regs array refer to 4-byte
goetz@6458 496 // quantities. Values less than VMRegImpl::stack0 are registers, those above
goetz@6458 497 // refer to 4-byte stack slots. All stack slots are based off of the stack pointer
goetz@6458 498 // as framesizes are fixed.
goetz@6458 499 // VMRegImpl::stack0 refers to the first slot 0(sp).
goetz@6458 500 // and VMRegImpl::stack0+1 refers to the memory word 4-bytes higher. Register
goetz@6458 501 // up to RegisterImpl::number_of_registers) are the 64-bit
goetz@6458 502 // integer registers.
goetz@6458 503
goetz@6458 504 // Note: the INPUTS in sig_bt are in units of Java argument words, which are
goetz@6458 505 // either 32-bit or 64-bit depending on the build. The OUTPUTS are in 32-bit
goetz@6458 506 // units regardless of build. Of course for i486 there is no 64 bit build
goetz@6458 507
goetz@6458 508 // The Java calling convention is a "shifted" version of the C ABI.
goetz@6458 509 // By skipping the first C ABI register we can call non-static jni methods
goetz@6458 510 // with small numbers of arguments without having to shuffle the arguments
goetz@6458 511 // at all. Since we control the java ABI we ought to at least get some
goetz@6458 512 // advantage out of it.
goetz@6458 513
goetz@6458 514 const VMReg java_iarg_reg[8] = {
goetz@6458 515 R3->as_VMReg(),
goetz@6458 516 R4->as_VMReg(),
goetz@6458 517 R5->as_VMReg(),
goetz@6458 518 R6->as_VMReg(),
goetz@6458 519 R7->as_VMReg(),
goetz@6458 520 R8->as_VMReg(),
goetz@6458 521 R9->as_VMReg(),
goetz@6458 522 R10->as_VMReg()
goetz@6458 523 };
goetz@6458 524
goetz@6458 525 const VMReg java_farg_reg[13] = {
goetz@6458 526 F1->as_VMReg(),
goetz@6458 527 F2->as_VMReg(),
goetz@6458 528 F3->as_VMReg(),
goetz@6458 529 F4->as_VMReg(),
goetz@6458 530 F5->as_VMReg(),
goetz@6458 531 F6->as_VMReg(),
goetz@6458 532 F7->as_VMReg(),
goetz@6458 533 F8->as_VMReg(),
goetz@6458 534 F9->as_VMReg(),
goetz@6458 535 F10->as_VMReg(),
goetz@6458 536 F11->as_VMReg(),
goetz@6458 537 F12->as_VMReg(),
goetz@6458 538 F13->as_VMReg()
goetz@6458 539 };
goetz@6458 540
goetz@6458 541 const int num_java_iarg_registers = sizeof(java_iarg_reg) / sizeof(java_iarg_reg[0]);
goetz@6458 542 const int num_java_farg_registers = sizeof(java_farg_reg) / sizeof(java_farg_reg[0]);
goetz@6458 543
goetz@6458 544 int SharedRuntime::java_calling_convention(const BasicType *sig_bt,
goetz@6458 545 VMRegPair *regs,
goetz@6458 546 int total_args_passed,
goetz@6458 547 int is_outgoing) {
goetz@6458 548 // C2c calling conventions for compiled-compiled calls.
goetz@6458 549 // Put 8 ints/longs into registers _AND_ 13 float/doubles into
goetz@6458 550 // registers _AND_ put the rest on the stack.
goetz@6458 551
goetz@6458 552 const int inc_stk_for_intfloat = 1; // 1 slots for ints and floats
goetz@6458 553 const int inc_stk_for_longdouble = 2; // 2 slots for longs and doubles
goetz@6458 554
goetz@6458 555 int i;
goetz@6458 556 VMReg reg;
goetz@6458 557 int stk = 0;
goetz@6458 558 int ireg = 0;
goetz@6458 559 int freg = 0;
goetz@6458 560
goetz@6458 561 // We put the first 8 arguments into registers and the rest on the
goetz@6458 562 // stack, float arguments are already in their argument registers
goetz@6458 563 // due to c2c calling conventions (see calling_convention).
goetz@6458 564 for (int i = 0; i < total_args_passed; ++i) {
goetz@6458 565 switch(sig_bt[i]) {
goetz@6458 566 case T_BOOLEAN:
goetz@6458 567 case T_CHAR:
goetz@6458 568 case T_BYTE:
goetz@6458 569 case T_SHORT:
goetz@6458 570 case T_INT:
goetz@6458 571 if (ireg < num_java_iarg_registers) {
goetz@6458 572 // Put int/ptr in register
goetz@6458 573 reg = java_iarg_reg[ireg];
goetz@6458 574 ++ireg;
goetz@6458 575 } else {
goetz@6458 576 // Put int/ptr on stack.
goetz@6458 577 reg = VMRegImpl::stack2reg(stk);
goetz@6458 578 stk += inc_stk_for_intfloat;
goetz@6458 579 }
goetz@6458 580 regs[i].set1(reg);
goetz@6458 581 break;
goetz@6458 582 case T_LONG:
goetz@6458 583 assert(sig_bt[i+1] == T_VOID, "expecting half");
goetz@6458 584 if (ireg < num_java_iarg_registers) {
goetz@6458 585 // Put long in register.
goetz@6458 586 reg = java_iarg_reg[ireg];
goetz@6458 587 ++ireg;
goetz@6458 588 } else {
goetz@6458 589 // Put long on stack. They must be aligned to 2 slots.
goetz@6458 590 if (stk & 0x1) ++stk;
goetz@6458 591 reg = VMRegImpl::stack2reg(stk);
goetz@6458 592 stk += inc_stk_for_longdouble;
goetz@6458 593 }
goetz@6458 594 regs[i].set2(reg);
goetz@6458 595 break;
goetz@6458 596 case T_OBJECT:
goetz@6458 597 case T_ARRAY:
goetz@6458 598 case T_ADDRESS:
goetz@6458 599 if (ireg < num_java_iarg_registers) {
goetz@6458 600 // Put ptr in register.
goetz@6458 601 reg = java_iarg_reg[ireg];
goetz@6458 602 ++ireg;
goetz@6458 603 } else {
goetz@6458 604 // Put ptr on stack. Objects must be aligned to 2 slots too,
goetz@6458 605 // because "64-bit pointers record oop-ishness on 2 aligned
goetz@6458 606 // adjacent registers." (see OopFlow::build_oop_map).
goetz@6458 607 if (stk & 0x1) ++stk;
goetz@6458 608 reg = VMRegImpl::stack2reg(stk);
goetz@6458 609 stk += inc_stk_for_longdouble;
goetz@6458 610 }
goetz@6458 611 regs[i].set2(reg);
goetz@6458 612 break;
goetz@6458 613 case T_FLOAT:
goetz@6458 614 if (freg < num_java_farg_registers) {
goetz@6458 615 // Put float in register.
goetz@6458 616 reg = java_farg_reg[freg];
goetz@6458 617 ++freg;
goetz@6458 618 } else {
goetz@6458 619 // Put float on stack.
goetz@6458 620 reg = VMRegImpl::stack2reg(stk);
goetz@6458 621 stk += inc_stk_for_intfloat;
goetz@6458 622 }
goetz@6458 623 regs[i].set1(reg);
goetz@6458 624 break;
goetz@6458 625 case T_DOUBLE:
goetz@6458 626 assert(sig_bt[i+1] == T_VOID, "expecting half");
goetz@6458 627 if (freg < num_java_farg_registers) {
goetz@6458 628 // Put double in register.
goetz@6458 629 reg = java_farg_reg[freg];
goetz@6458 630 ++freg;
goetz@6458 631 } else {
goetz@6458 632 // Put double on stack. They must be aligned to 2 slots.
goetz@6458 633 if (stk & 0x1) ++stk;
goetz@6458 634 reg = VMRegImpl::stack2reg(stk);
goetz@6458 635 stk += inc_stk_for_longdouble;
goetz@6458 636 }
goetz@6458 637 regs[i].set2(reg);
goetz@6458 638 break;
goetz@6458 639 case T_VOID:
goetz@6458 640 // Do not count halves.
goetz@6458 641 regs[i].set_bad();
goetz@6458 642 break;
goetz@6458 643 default:
goetz@6458 644 ShouldNotReachHere();
goetz@6458 645 }
goetz@6458 646 }
goetz@6458 647 return round_to(stk, 2);
goetz@6458 648 }
goetz@6458 649
goetz@6458 650 #ifdef COMPILER2
goetz@6458 651 // Calling convention for calling C code.
goetz@6458 652 int SharedRuntime::c_calling_convention(const BasicType *sig_bt,
goetz@6458 653 VMRegPair *regs,
goetz@6458 654 VMRegPair *regs2,
goetz@6458 655 int total_args_passed) {
goetz@6458 656 // Calling conventions for C runtime calls and calls to JNI native methods.
goetz@6458 657 //
goetz@6458 658 // PPC64 convention: Hoist the first 8 int/ptr/long's in the first 8
goetz@6458 659 // int regs, leaving int regs undefined if the arg is flt/dbl. Hoist
goetz@6458 660 // the first 13 flt/dbl's in the first 13 fp regs but additionally
goetz@6458 661 // copy flt/dbl to the stack if they are beyond the 8th argument.
goetz@6458 662
goetz@6458 663 const VMReg iarg_reg[8] = {
goetz@6458 664 R3->as_VMReg(),
goetz@6458 665 R4->as_VMReg(),
goetz@6458 666 R5->as_VMReg(),
goetz@6458 667 R6->as_VMReg(),
goetz@6458 668 R7->as_VMReg(),
goetz@6458 669 R8->as_VMReg(),
goetz@6458 670 R9->as_VMReg(),
goetz@6458 671 R10->as_VMReg()
goetz@6458 672 };
goetz@6458 673
goetz@6458 674 const VMReg farg_reg[13] = {
goetz@6458 675 F1->as_VMReg(),
goetz@6458 676 F2->as_VMReg(),
goetz@6458 677 F3->as_VMReg(),
goetz@6458 678 F4->as_VMReg(),
goetz@6458 679 F5->as_VMReg(),
goetz@6458 680 F6->as_VMReg(),
goetz@6458 681 F7->as_VMReg(),
goetz@6458 682 F8->as_VMReg(),
goetz@6458 683 F9->as_VMReg(),
goetz@6458 684 F10->as_VMReg(),
goetz@6458 685 F11->as_VMReg(),
goetz@6458 686 F12->as_VMReg(),
goetz@6458 687 F13->as_VMReg()
goetz@6458 688 };
goetz@6458 689
goetz@6458 690 // Check calling conventions consistency.
goetz@6495 691 assert(sizeof(iarg_reg) / sizeof(iarg_reg[0]) == Argument::n_int_register_parameters_c &&
goetz@6495 692 sizeof(farg_reg) / sizeof(farg_reg[0]) == Argument::n_float_register_parameters_c,
goetz@6458 693 "consistency");
goetz@6458 694
goetz@6458 695 // `Stk' counts stack slots. Due to alignment, 32 bit values occupy
goetz@6458 696 // 2 such slots, like 64 bit values do.
goetz@6458 697 const int inc_stk_for_intfloat = 2; // 2 slots for ints and floats
goetz@6458 698 const int inc_stk_for_longdouble = 2; // 2 slots for longs and doubles
goetz@6458 699
goetz@6458 700 int i;
goetz@6458 701 VMReg reg;
goetz@6511 702 // Leave room for C-compatible ABI_REG_ARGS.
goetz@6511 703 int stk = (frame::abi_reg_args_size - frame::jit_out_preserve_size) / VMRegImpl::stack_slot_size;
goetz@6458 704 int arg = 0;
goetz@6458 705 int freg = 0;
goetz@6458 706
goetz@6458 707 // Avoid passing C arguments in the wrong stack slots.
goetz@6511 708 #if defined(ABI_ELFv2)
goetz@6511 709 assert((SharedRuntime::out_preserve_stack_slots() + stk) * VMRegImpl::stack_slot_size == 96,
goetz@6511 710 "passing C arguments in wrong stack slots");
goetz@6511 711 #else
goetz@6458 712 assert((SharedRuntime::out_preserve_stack_slots() + stk) * VMRegImpl::stack_slot_size == 112,
goetz@6458 713 "passing C arguments in wrong stack slots");
goetz@6511 714 #endif
goetz@6458 715 // We fill-out regs AND regs2 if an argument must be passed in a
goetz@6458 716 // register AND in a stack slot. If regs2 is NULL in such a
goetz@6458 717 // situation, we bail-out with a fatal error.
goetz@6458 718 for (int i = 0; i < total_args_passed; ++i, ++arg) {
goetz@6458 719 // Initialize regs2 to BAD.
goetz@6458 720 if (regs2 != NULL) regs2[i].set_bad();
goetz@6458 721
goetz@6458 722 switch(sig_bt[i]) {
goetz@6495 723
goetz@6495 724 //
goetz@6495 725 // If arguments 0-7 are integers, they are passed in integer registers.
goetz@6495 726 // Argument i is placed in iarg_reg[i].
goetz@6495 727 //
goetz@6458 728 case T_BOOLEAN:
goetz@6458 729 case T_CHAR:
goetz@6458 730 case T_BYTE:
goetz@6458 731 case T_SHORT:
goetz@6458 732 case T_INT:
goetz@6458 733 // We must cast ints to longs and use full 64 bit stack slots
goetz@6458 734 // here. We do the cast in GraphKit::gen_stub() and just guard
goetz@6458 735 // here against loosing that change.
goetz@6468 736 assert(CCallingConventionRequiresIntsAsLongs,
goetz@6458 737 "argument of type int should be promoted to type long");
goetz@6458 738 guarantee(i > 0 && sig_bt[i-1] == T_LONG,
goetz@6458 739 "argument of type (bt) should have been promoted to type (T_LONG,bt) for bt in "
goetz@6458 740 "{T_BOOLEAN, T_CHAR, T_BYTE, T_SHORT, T_INT}");
goetz@6458 741 // Do not count halves.
goetz@6458 742 regs[i].set_bad();
goetz@6458 743 --arg;
goetz@6458 744 break;
goetz@6458 745 case T_LONG:
goetz@6458 746 guarantee(sig_bt[i+1] == T_VOID ||
goetz@6458 747 sig_bt[i+1] == T_BOOLEAN || sig_bt[i+1] == T_CHAR ||
goetz@6458 748 sig_bt[i+1] == T_BYTE || sig_bt[i+1] == T_SHORT ||
goetz@6458 749 sig_bt[i+1] == T_INT,
goetz@6458 750 "expecting type (T_LONG,half) or type (T_LONG,bt) with bt in {T_BOOLEAN, T_CHAR, T_BYTE, T_SHORT, T_INT}");
goetz@6458 751 case T_OBJECT:
goetz@6458 752 case T_ARRAY:
goetz@6458 753 case T_ADDRESS:
goetz@6458 754 case T_METADATA:
goetz@6458 755 // Oops are already boxed if required (JNI).
goetz@6495 756 if (arg < Argument::n_int_register_parameters_c) {
goetz@6458 757 reg = iarg_reg[arg];
goetz@6458 758 } else {
goetz@6458 759 reg = VMRegImpl::stack2reg(stk);
goetz@6458 760 stk += inc_stk_for_longdouble;
goetz@6458 761 }
goetz@6458 762 regs[i].set2(reg);
goetz@6458 763 break;
goetz@6495 764
goetz@6495 765 //
goetz@6495 766 // Floats are treated differently from int regs: The first 13 float arguments
goetz@6495 767 // are passed in registers (not the float args among the first 13 args).
goetz@6495 768 // Thus argument i is NOT passed in farg_reg[i] if it is float. It is passed
goetz@6495 769 // in farg_reg[j] if argument i is the j-th float argument of this call.
goetz@6495 770 //
goetz@6458 771 case T_FLOAT:
goetz@6495 772 if (freg < Argument::n_float_register_parameters_c) {
goetz@6495 773 // Put float in register ...
goetz@6458 774 reg = farg_reg[freg];
goetz@6495 775 ++freg;
goetz@6495 776
goetz@6495 777 // Argument i for i > 8 is placed on the stack even if it's
goetz@6495 778 // placed in a register (if it's a float arg). Aix disassembly
goetz@6495 779 // shows that xlC places these float args on the stack AND in
goetz@6495 780 // a register. This is not documented, but we follow this
goetz@6495 781 // convention, too.
goetz@6495 782 if (arg >= Argument::n_regs_not_on_stack_c) {
goetz@6495 783 // ... and on the stack.
goetz@6495 784 guarantee(regs2 != NULL, "must pass float in register and stack slot");
goetz@6495 785 VMReg reg2 = VMRegImpl::stack2reg(stk LINUX_ONLY(+1));
goetz@6495 786 regs2[i].set1(reg2);
goetz@6495 787 stk += inc_stk_for_intfloat;
goetz@6495 788 }
goetz@6495 789
goetz@6458 790 } else {
goetz@6495 791 // Put float on stack.
goetz@6495 792 reg = VMRegImpl::stack2reg(stk LINUX_ONLY(+1));
goetz@6458 793 stk += inc_stk_for_intfloat;
goetz@6458 794 }
goetz@6458 795 regs[i].set1(reg);
goetz@6458 796 break;
goetz@6458 797 case T_DOUBLE:
goetz@6458 798 assert(sig_bt[i+1] == T_VOID, "expecting half");
goetz@6495 799 if (freg < Argument::n_float_register_parameters_c) {
goetz@6495 800 // Put double in register ...
goetz@6458 801 reg = farg_reg[freg];
goetz@6495 802 ++freg;
goetz@6495 803
goetz@6495 804 // Argument i for i > 8 is placed on the stack even if it's
goetz@6495 805 // placed in a register (if it's a double arg). Aix disassembly
goetz@6495 806 // shows that xlC places these float args on the stack AND in
goetz@6495 807 // a register. This is not documented, but we follow this
goetz@6495 808 // convention, too.
goetz@6495 809 if (arg >= Argument::n_regs_not_on_stack_c) {
goetz@6495 810 // ... and on the stack.
goetz@6495 811 guarantee(regs2 != NULL, "must pass float in register and stack slot");
goetz@6495 812 VMReg reg2 = VMRegImpl::stack2reg(stk);
goetz@6495 813 regs2[i].set2(reg2);
goetz@6495 814 stk += inc_stk_for_longdouble;
goetz@6495 815 }
goetz@6458 816 } else {
goetz@6458 817 // Put double on stack.
goetz@6458 818 reg = VMRegImpl::stack2reg(stk);
goetz@6458 819 stk += inc_stk_for_longdouble;
goetz@6458 820 }
goetz@6458 821 regs[i].set2(reg);
goetz@6458 822 break;
goetz@6495 823
goetz@6458 824 case T_VOID:
goetz@6458 825 // Do not count halves.
goetz@6458 826 regs[i].set_bad();
goetz@6458 827 --arg;
goetz@6458 828 break;
goetz@6458 829 default:
goetz@6458 830 ShouldNotReachHere();
goetz@6458 831 }
goetz@6458 832 }
goetz@6458 833
goetz@6458 834 return round_to(stk, 2);
goetz@6458 835 }
goetz@6458 836 #endif // COMPILER2
goetz@6458 837
goetz@6458 838 static address gen_c2i_adapter(MacroAssembler *masm,
goetz@6458 839 int total_args_passed,
goetz@6458 840 int comp_args_on_stack,
goetz@6458 841 const BasicType *sig_bt,
goetz@6458 842 const VMRegPair *regs,
goetz@6458 843 Label& call_interpreter,
goetz@6458 844 const Register& ientry) {
goetz@6458 845
goetz@6458 846 address c2i_entrypoint;
goetz@6458 847
goetz@6458 848 const Register sender_SP = R21_sender_SP; // == R21_tmp1
goetz@6458 849 const Register code = R22_tmp2;
goetz@6458 850 //const Register ientry = R23_tmp3;
goetz@6458 851 const Register value_regs[] = { R24_tmp4, R25_tmp5, R26_tmp6 };
goetz@6458 852 const int num_value_regs = sizeof(value_regs) / sizeof(Register);
goetz@6458 853 int value_regs_index = 0;
goetz@6458 854
goetz@6458 855 const Register return_pc = R27_tmp7;
goetz@6458 856 const Register tmp = R28_tmp8;
goetz@6458 857
goetz@6458 858 assert_different_registers(sender_SP, code, ientry, return_pc, tmp);
goetz@6458 859
goetz@6458 860 // Adapter needs TOP_IJAVA_FRAME_ABI.
goetz@6458 861 const int adapter_size = frame::top_ijava_frame_abi_size +
goetz@6458 862 round_to(total_args_passed * wordSize, frame::alignment_in_bytes);
goetz@6458 863
goetz@6458 864 // regular (verified) c2i entry point
goetz@6458 865 c2i_entrypoint = __ pc();
goetz@6458 866
goetz@6458 867 // Does compiled code exists? If yes, patch the caller's callsite.
goetz@6458 868 __ ld(code, method_(code));
goetz@6458 869 __ cmpdi(CCR0, code, 0);
goetz@6458 870 __ ld(ientry, method_(interpreter_entry)); // preloaded
goetz@6458 871 __ beq(CCR0, call_interpreter);
goetz@6458 872
goetz@6458 873
goetz@6458 874 // Patch caller's callsite, method_(code) was not NULL which means that
goetz@6458 875 // compiled code exists.
goetz@6458 876 __ mflr(return_pc);
goetz@6458 877 __ std(return_pc, _abi(lr), R1_SP);
goetz@6458 878 RegisterSaver::push_frame_and_save_argument_registers(masm, tmp, adapter_size, total_args_passed, regs);
goetz@6458 879
goetz@6458 880 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::fixup_callers_callsite), R19_method, return_pc);
goetz@6458 881
goetz@6458 882 RegisterSaver::restore_argument_registers_and_pop_frame(masm, adapter_size, total_args_passed, regs);
goetz@6458 883 __ ld(return_pc, _abi(lr), R1_SP);
goetz@6458 884 __ ld(ientry, method_(interpreter_entry)); // preloaded
goetz@6458 885 __ mtlr(return_pc);
goetz@6458 886
goetz@6458 887
goetz@6495 888 // Call the interpreter.
goetz@6458 889 __ BIND(call_interpreter);
goetz@6458 890 __ mtctr(ientry);
goetz@6458 891
goetz@6458 892 // Get a copy of the current SP for loading caller's arguments.
goetz@6458 893 __ mr(sender_SP, R1_SP);
goetz@6458 894
goetz@6458 895 // Add space for the adapter.
goetz@6458 896 __ resize_frame(-adapter_size, R12_scratch2);
goetz@6458 897
goetz@6458 898 int st_off = adapter_size - wordSize;
goetz@6458 899
goetz@6458 900 // Write the args into the outgoing interpreter space.
goetz@6458 901 for (int i = 0; i < total_args_passed; i++) {
goetz@6458 902 VMReg r_1 = regs[i].first();
goetz@6458 903 VMReg r_2 = regs[i].second();
goetz@6458 904 if (!r_1->is_valid()) {
goetz@6458 905 assert(!r_2->is_valid(), "");
goetz@6458 906 continue;
goetz@6458 907 }
goetz@6458 908 if (r_1->is_stack()) {
goetz@6458 909 Register tmp_reg = value_regs[value_regs_index];
goetz@6458 910 value_regs_index = (value_regs_index + 1) % num_value_regs;
goetz@6458 911 // The calling convention produces OptoRegs that ignore the out
goetz@6458 912 // preserve area (JIT's ABI). We must account for it here.
goetz@6458 913 int ld_off = (r_1->reg2stack() + SharedRuntime::out_preserve_stack_slots()) * VMRegImpl::stack_slot_size;
goetz@6458 914 if (!r_2->is_valid()) {
goetz@6458 915 __ lwz(tmp_reg, ld_off, sender_SP);
goetz@6458 916 } else {
goetz@6458 917 __ ld(tmp_reg, ld_off, sender_SP);
goetz@6458 918 }
goetz@6458 919 // Pretend stack targets were loaded into tmp_reg.
goetz@6458 920 r_1 = tmp_reg->as_VMReg();
goetz@6458 921 }
goetz@6458 922
goetz@6458 923 if (r_1->is_Register()) {
goetz@6458 924 Register r = r_1->as_Register();
goetz@6458 925 if (!r_2->is_valid()) {
goetz@6458 926 __ stw(r, st_off, R1_SP);
goetz@6458 927 st_off-=wordSize;
goetz@6458 928 } else {
goetz@6458 929 // Longs are given 2 64-bit slots in the interpreter, but the
goetz@6458 930 // data is passed in only 1 slot.
goetz@6458 931 if (sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) {
goetz@6458 932 DEBUG_ONLY( __ li(tmp, 0); __ std(tmp, st_off, R1_SP); )
goetz@6458 933 st_off-=wordSize;
goetz@6458 934 }
goetz@6458 935 __ std(r, st_off, R1_SP);
goetz@6458 936 st_off-=wordSize;
goetz@6458 937 }
goetz@6458 938 } else {
goetz@6458 939 assert(r_1->is_FloatRegister(), "");
goetz@6458 940 FloatRegister f = r_1->as_FloatRegister();
goetz@6458 941 if (!r_2->is_valid()) {
goetz@6458 942 __ stfs(f, st_off, R1_SP);
goetz@6458 943 st_off-=wordSize;
goetz@6458 944 } else {
goetz@6458 945 // In 64bit, doubles are given 2 64-bit slots in the interpreter, but the
goetz@6458 946 // data is passed in only 1 slot.
goetz@6458 947 // One of these should get known junk...
goetz@6458 948 DEBUG_ONLY( __ li(tmp, 0); __ std(tmp, st_off, R1_SP); )
goetz@6458 949 st_off-=wordSize;
goetz@6458 950 __ stfd(f, st_off, R1_SP);
goetz@6458 951 st_off-=wordSize;
goetz@6458 952 }
goetz@6458 953 }
goetz@6458 954 }
goetz@6458 955
goetz@6458 956 // Jump to the interpreter just as if interpreter was doing it.
goetz@6458 957
goetz@6495 958 #ifdef CC_INTERP
goetz@6495 959 const Register tos = R17_tos;
goetz@6495 960 #endif
goetz@6495 961
goetz@6458 962 // load TOS
goetz@6495 963 __ addi(tos, R1_SP, st_off);
goetz@6458 964
goetz@6458 965 // Frame_manager expects initial_caller_sp (= SP without resize by c2i) in R21_tmp1.
goetz@6458 966 assert(sender_SP == R21_sender_SP, "passing initial caller's SP in wrong register");
goetz@6458 967 __ bctr();
goetz@6458 968
goetz@6458 969 return c2i_entrypoint;
goetz@6458 970 }
goetz@6458 971
goetz@6458 972 static void gen_i2c_adapter(MacroAssembler *masm,
goetz@6458 973 int total_args_passed,
goetz@6458 974 int comp_args_on_stack,
goetz@6458 975 const BasicType *sig_bt,
goetz@6458 976 const VMRegPair *regs) {
goetz@6458 977
goetz@6458 978 // Load method's entry-point from methodOop.
goetz@6458 979 __ ld(R12_scratch2, in_bytes(Method::from_compiled_offset()), R19_method);
goetz@6458 980 __ mtctr(R12_scratch2);
goetz@6458 981
goetz@6458 982 // We will only enter here from an interpreted frame and never from after
goetz@6458 983 // passing thru a c2i. Azul allowed this but we do not. If we lose the
goetz@6458 984 // race and use a c2i we will remain interpreted for the race loser(s).
goetz@6458 985 // This removes all sorts of headaches on the x86 side and also eliminates
goetz@6458 986 // the possibility of having c2i -> i2c -> c2i -> ... endless transitions.
goetz@6458 987
goetz@6458 988 // Note: r13 contains the senderSP on entry. We must preserve it since
goetz@6458 989 // we may do a i2c -> c2i transition if we lose a race where compiled
goetz@6458 990 // code goes non-entrant while we get args ready.
goetz@6458 991 // In addition we use r13 to locate all the interpreter args as
goetz@6458 992 // we must align the stack to 16 bytes on an i2c entry else we
goetz@6458 993 // lose alignment we expect in all compiled code and register
goetz@6458 994 // save code can segv when fxsave instructions find improperly
goetz@6458 995 // aligned stack pointer.
goetz@6458 996
goetz@6495 997 #ifdef CC_INTERP
goetz@6458 998 const Register ld_ptr = R17_tos;
goetz@6495 999 #endif
goetz@6458 1000 const Register value_regs[] = { R22_tmp2, R23_tmp3, R24_tmp4, R25_tmp5, R26_tmp6 };
goetz@6458 1001 const int num_value_regs = sizeof(value_regs) / sizeof(Register);
goetz@6458 1002 int value_regs_index = 0;
goetz@6458 1003
goetz@6458 1004 int ld_offset = total_args_passed*wordSize;
goetz@6458 1005
goetz@6458 1006 // Cut-out for having no stack args. Since up to 2 int/oop args are passed
goetz@6458 1007 // in registers, we will occasionally have no stack args.
goetz@6458 1008 int comp_words_on_stack = 0;
goetz@6458 1009 if (comp_args_on_stack) {
goetz@6458 1010 // Sig words on the stack are greater-than VMRegImpl::stack0. Those in
goetz@6458 1011 // registers are below. By subtracting stack0, we either get a negative
goetz@6458 1012 // number (all values in registers) or the maximum stack slot accessed.
goetz@6458 1013
goetz@6458 1014 // Convert 4-byte c2 stack slots to words.
goetz@6458 1015 comp_words_on_stack = round_to(comp_args_on_stack*VMRegImpl::stack_slot_size, wordSize)>>LogBytesPerWord;
goetz@6458 1016 // Round up to miminum stack alignment, in wordSize.
goetz@6458 1017 comp_words_on_stack = round_to(comp_words_on_stack, 2);
goetz@6458 1018 __ resize_frame(-comp_words_on_stack * wordSize, R11_scratch1);
goetz@6458 1019 }
goetz@6458 1020
goetz@6458 1021 // Now generate the shuffle code. Pick up all register args and move the
goetz@6458 1022 // rest through register value=Z_R12.
goetz@6458 1023 BLOCK_COMMENT("Shuffle arguments");
goetz@6458 1024 for (int i = 0; i < total_args_passed; i++) {
goetz@6458 1025 if (sig_bt[i] == T_VOID) {
goetz@6458 1026 assert(i > 0 && (sig_bt[i-1] == T_LONG || sig_bt[i-1] == T_DOUBLE), "missing half");
goetz@6458 1027 continue;
goetz@6458 1028 }
goetz@6458 1029
goetz@6458 1030 // Pick up 0, 1 or 2 words from ld_ptr.
goetz@6458 1031 assert(!regs[i].second()->is_valid() || regs[i].first()->next() == regs[i].second(),
goetz@6458 1032 "scrambled load targets?");
goetz@6458 1033 VMReg r_1 = regs[i].first();
goetz@6458 1034 VMReg r_2 = regs[i].second();
goetz@6458 1035 if (!r_1->is_valid()) {
goetz@6458 1036 assert(!r_2->is_valid(), "");
goetz@6458 1037 continue;
goetz@6458 1038 }
goetz@6458 1039 if (r_1->is_FloatRegister()) {
goetz@6458 1040 if (!r_2->is_valid()) {
goetz@6458 1041 __ lfs(r_1->as_FloatRegister(), ld_offset, ld_ptr);
goetz@6458 1042 ld_offset-=wordSize;
goetz@6458 1043 } else {
goetz@6458 1044 // Skip the unused interpreter slot.
goetz@6458 1045 __ lfd(r_1->as_FloatRegister(), ld_offset-wordSize, ld_ptr);
goetz@6458 1046 ld_offset-=2*wordSize;
goetz@6458 1047 }
goetz@6458 1048 } else {
goetz@6458 1049 Register r;
goetz@6458 1050 if (r_1->is_stack()) {
goetz@6458 1051 // Must do a memory to memory move thru "value".
goetz@6458 1052 r = value_regs[value_regs_index];
goetz@6458 1053 value_regs_index = (value_regs_index + 1) % num_value_regs;
goetz@6458 1054 } else {
goetz@6458 1055 r = r_1->as_Register();
goetz@6458 1056 }
goetz@6458 1057 if (!r_2->is_valid()) {
goetz@6458 1058 // Not sure we need to do this but it shouldn't hurt.
goetz@6458 1059 if (sig_bt[i] == T_OBJECT || sig_bt[i] == T_ADDRESS || sig_bt[i] == T_ARRAY) {
goetz@6458 1060 __ ld(r, ld_offset, ld_ptr);
goetz@6458 1061 ld_offset-=wordSize;
goetz@6458 1062 } else {
goetz@6458 1063 __ lwz(r, ld_offset, ld_ptr);
goetz@6458 1064 ld_offset-=wordSize;
goetz@6458 1065 }
goetz@6458 1066 } else {
goetz@6458 1067 // In 64bit, longs are given 2 64-bit slots in the interpreter, but the
goetz@6458 1068 // data is passed in only 1 slot.
goetz@6458 1069 if (sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) {
goetz@6458 1070 ld_offset-=wordSize;
goetz@6458 1071 }
goetz@6458 1072 __ ld(r, ld_offset, ld_ptr);
goetz@6458 1073 ld_offset-=wordSize;
goetz@6458 1074 }
goetz@6458 1075
goetz@6458 1076 if (r_1->is_stack()) {
goetz@6458 1077 // Now store value where the compiler expects it
goetz@6458 1078 int st_off = (r_1->reg2stack() + SharedRuntime::out_preserve_stack_slots())*VMRegImpl::stack_slot_size;
goetz@6458 1079
goetz@6458 1080 if (sig_bt[i] == T_INT || sig_bt[i] == T_FLOAT ||sig_bt[i] == T_BOOLEAN ||
goetz@6458 1081 sig_bt[i] == T_SHORT || sig_bt[i] == T_CHAR || sig_bt[i] == T_BYTE) {
goetz@6458 1082 __ stw(r, st_off, R1_SP);
goetz@6458 1083 } else {
goetz@6458 1084 __ std(r, st_off, R1_SP);
goetz@6458 1085 }
goetz@6458 1086 }
goetz@6458 1087 }
goetz@6458 1088 }
goetz@6458 1089
goetz@6458 1090 BLOCK_COMMENT("Store method oop");
goetz@6458 1091 // Store method oop into thread->callee_target.
goetz@6458 1092 // We might end up in handle_wrong_method if the callee is
goetz@6458 1093 // deoptimized as we race thru here. If that happens we don't want
goetz@6458 1094 // to take a safepoint because the caller frame will look
goetz@6458 1095 // interpreted and arguments are now "compiled" so it is much better
goetz@6458 1096 // to make this transition invisible to the stack walking
goetz@6458 1097 // code. Unfortunately if we try and find the callee by normal means
goetz@6458 1098 // a safepoint is possible. So we stash the desired callee in the
goetz@6458 1099 // thread and the vm will find there should this case occur.
goetz@6458 1100 __ std(R19_method, thread_(callee_target));
goetz@6458 1101
goetz@6458 1102 // Jump to the compiled code just as if compiled code was doing it.
goetz@6458 1103 __ bctr();
goetz@6458 1104 }
goetz@6458 1105
goetz@6458 1106 AdapterHandlerEntry* SharedRuntime::generate_i2c2i_adapters(MacroAssembler *masm,
goetz@6458 1107 int total_args_passed,
goetz@6458 1108 int comp_args_on_stack,
goetz@6458 1109 const BasicType *sig_bt,
goetz@6458 1110 const VMRegPair *regs,
goetz@6458 1111 AdapterFingerPrint* fingerprint) {
goetz@6458 1112 address i2c_entry;
goetz@6458 1113 address c2i_unverified_entry;
goetz@6458 1114 address c2i_entry;
goetz@6458 1115
goetz@6458 1116
goetz@6458 1117 // entry: i2c
goetz@6458 1118
goetz@6458 1119 __ align(CodeEntryAlignment);
goetz@6458 1120 i2c_entry = __ pc();
goetz@6458 1121 gen_i2c_adapter(masm, total_args_passed, comp_args_on_stack, sig_bt, regs);
goetz@6458 1122
goetz@6458 1123
goetz@6458 1124 // entry: c2i unverified
goetz@6458 1125
goetz@6458 1126 __ align(CodeEntryAlignment);
goetz@6458 1127 BLOCK_COMMENT("c2i unverified entry");
goetz@6458 1128 c2i_unverified_entry = __ pc();
goetz@6458 1129
goetz@6458 1130 // inline_cache contains a compiledICHolder
goetz@6458 1131 const Register ic = R19_method;
goetz@6458 1132 const Register ic_klass = R11_scratch1;
goetz@6458 1133 const Register receiver_klass = R12_scratch2;
goetz@6458 1134 const Register code = R21_tmp1;
goetz@6458 1135 const Register ientry = R23_tmp3;
goetz@6458 1136
goetz@6458 1137 assert_different_registers(ic, ic_klass, receiver_klass, R3_ARG1, code, ientry);
goetz@6458 1138 assert(R11_scratch1 == R11, "need prologue scratch register");
goetz@6458 1139
goetz@6458 1140 Label call_interpreter;
goetz@6458 1141
goetz@6458 1142 assert(!MacroAssembler::needs_explicit_null_check(oopDesc::klass_offset_in_bytes()),
goetz@6458 1143 "klass offset should reach into any page");
goetz@6458 1144 // Check for NULL argument if we don't have implicit null checks.
goetz@6486 1145 if (!ImplicitNullChecks || !os::zero_page_read_protected()) {
goetz@6458 1146 if (TrapBasedNullChecks) {
goetz@6458 1147 __ trap_null_check(R3_ARG1);
goetz@6458 1148 } else {
goetz@6458 1149 Label valid;
goetz@6458 1150 __ cmpdi(CCR0, R3_ARG1, 0);
goetz@6458 1151 __ bne_predict_taken(CCR0, valid);
goetz@6458 1152 // We have a null argument, branch to ic_miss_stub.
goetz@6458 1153 __ b64_patchable((address)SharedRuntime::get_ic_miss_stub(),
goetz@6495 1154 relocInfo::runtime_call_type);
goetz@6458 1155 __ BIND(valid);
goetz@6458 1156 }
goetz@6458 1157 }
goetz@6458 1158 // Assume argument is not NULL, load klass from receiver.
goetz@6458 1159 __ load_klass(receiver_klass, R3_ARG1);
goetz@6458 1160
goetz@6458 1161 __ ld(ic_klass, CompiledICHolder::holder_klass_offset(), ic);
goetz@6458 1162
goetz@6458 1163 if (TrapBasedICMissChecks) {
goetz@6458 1164 __ trap_ic_miss_check(receiver_klass, ic_klass);
goetz@6458 1165 } else {
goetz@6458 1166 Label valid;
goetz@6458 1167 __ cmpd(CCR0, receiver_klass, ic_klass);
goetz@6458 1168 __ beq_predict_taken(CCR0, valid);
goetz@6458 1169 // We have an unexpected klass, branch to ic_miss_stub.
goetz@6458 1170 __ b64_patchable((address)SharedRuntime::get_ic_miss_stub(),
goetz@6495 1171 relocInfo::runtime_call_type);
goetz@6458 1172 __ BIND(valid);
goetz@6458 1173 }
goetz@6458 1174
goetz@6458 1175 // Argument is valid and klass is as expected, continue.
goetz@6458 1176
goetz@6458 1177 // Extract method from inline cache, verified entry point needs it.
goetz@6458 1178 __ ld(R19_method, CompiledICHolder::holder_method_offset(), ic);
goetz@6458 1179 assert(R19_method == ic, "the inline cache register is dead here");
goetz@6458 1180
goetz@6458 1181 __ ld(code, method_(code));
goetz@6458 1182 __ cmpdi(CCR0, code, 0);
goetz@6458 1183 __ ld(ientry, method_(interpreter_entry)); // preloaded
goetz@6458 1184 __ beq_predict_taken(CCR0, call_interpreter);
goetz@6458 1185
goetz@6458 1186 // Branch to ic_miss_stub.
goetz@6495 1187 __ b64_patchable((address)SharedRuntime::get_ic_miss_stub(), relocInfo::runtime_call_type);
goetz@6458 1188
goetz@6458 1189 // entry: c2i
goetz@6458 1190
goetz@6458 1191 c2i_entry = gen_c2i_adapter(masm, total_args_passed, comp_args_on_stack, sig_bt, regs, call_interpreter, ientry);
goetz@6458 1192
goetz@6458 1193 return AdapterHandlerLibrary::new_entry(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry);
goetz@6458 1194 }
goetz@6458 1195
goetz@6458 1196 #ifdef COMPILER2
goetz@6458 1197 // An oop arg. Must pass a handle not the oop itself.
goetz@6458 1198 static void object_move(MacroAssembler* masm,
goetz@6458 1199 int frame_size_in_slots,
goetz@6458 1200 OopMap* oop_map, int oop_handle_offset,
goetz@6458 1201 bool is_receiver, int* receiver_offset,
goetz@6458 1202 VMRegPair src, VMRegPair dst,
goetz@6458 1203 Register r_caller_sp, Register r_temp_1, Register r_temp_2) {
goetz@6458 1204 assert(!is_receiver || (is_receiver && (*receiver_offset == -1)),
goetz@6458 1205 "receiver has already been moved");
goetz@6458 1206
goetz@6458 1207 // We must pass a handle. First figure out the location we use as a handle.
goetz@6458 1208
goetz@6458 1209 if (src.first()->is_stack()) {
goetz@6458 1210 // stack to stack or reg
goetz@6458 1211
goetz@6458 1212 const Register r_handle = dst.first()->is_stack() ? r_temp_1 : dst.first()->as_Register();
goetz@6458 1213 Label skip;
goetz@6458 1214 const int oop_slot_in_callers_frame = reg2slot(src.first());
goetz@6458 1215
goetz@6458 1216 guarantee(!is_receiver, "expecting receiver in register");
goetz@6458 1217 oop_map->set_oop(VMRegImpl::stack2reg(oop_slot_in_callers_frame + frame_size_in_slots));
goetz@6458 1218
goetz@6458 1219 __ addi(r_handle, r_caller_sp, reg2offset(src.first()));
goetz@6458 1220 __ ld( r_temp_2, reg2offset(src.first()), r_caller_sp);
goetz@6458 1221 __ cmpdi(CCR0, r_temp_2, 0);
goetz@6458 1222 __ bne(CCR0, skip);
goetz@6458 1223 // Use a NULL handle if oop is NULL.
goetz@6458 1224 __ li(r_handle, 0);
goetz@6458 1225 __ bind(skip);
goetz@6458 1226
goetz@6458 1227 if (dst.first()->is_stack()) {
goetz@6458 1228 // stack to stack
goetz@6458 1229 __ std(r_handle, reg2offset(dst.first()), R1_SP);
goetz@6458 1230 } else {
goetz@6458 1231 // stack to reg
goetz@6458 1232 // Nothing to do, r_handle is already the dst register.
goetz@6458 1233 }
goetz@6458 1234 } else {
goetz@6458 1235 // reg to stack or reg
goetz@6458 1236 const Register r_oop = src.first()->as_Register();
goetz@6458 1237 const Register r_handle = dst.first()->is_stack() ? r_temp_1 : dst.first()->as_Register();
goetz@6458 1238 const int oop_slot = (r_oop->encoding()-R3_ARG1->encoding()) * VMRegImpl::slots_per_word
goetz@6458 1239 + oop_handle_offset; // in slots
goetz@6458 1240 const int oop_offset = oop_slot * VMRegImpl::stack_slot_size;
goetz@6458 1241 Label skip;
goetz@6458 1242
goetz@6458 1243 if (is_receiver) {
goetz@6458 1244 *receiver_offset = oop_offset;
goetz@6458 1245 }
goetz@6458 1246 oop_map->set_oop(VMRegImpl::stack2reg(oop_slot));
goetz@6458 1247
goetz@6458 1248 __ std( r_oop, oop_offset, R1_SP);
goetz@6458 1249 __ addi(r_handle, R1_SP, oop_offset);
goetz@6458 1250
goetz@6458 1251 __ cmpdi(CCR0, r_oop, 0);
goetz@6458 1252 __ bne(CCR0, skip);
goetz@6458 1253 // Use a NULL handle if oop is NULL.
goetz@6458 1254 __ li(r_handle, 0);
goetz@6458 1255 __ bind(skip);
goetz@6458 1256
goetz@6458 1257 if (dst.first()->is_stack()) {
goetz@6458 1258 // reg to stack
goetz@6458 1259 __ std(r_handle, reg2offset(dst.first()), R1_SP);
goetz@6458 1260 } else {
goetz@6458 1261 // reg to reg
goetz@6458 1262 // Nothing to do, r_handle is already the dst register.
goetz@6458 1263 }
goetz@6458 1264 }
goetz@6458 1265 }
goetz@6458 1266
goetz@6458 1267 static void int_move(MacroAssembler*masm,
goetz@6458 1268 VMRegPair src, VMRegPair dst,
goetz@6458 1269 Register r_caller_sp, Register r_temp) {
goetz@6458 1270 assert(src.first()->is_valid() && src.second() == src.first()->next(), "incoming must be long-int");
goetz@6458 1271 assert(dst.first()->is_valid() && dst.second() == dst.first()->next(), "outgoing must be long");
goetz@6458 1272
goetz@6458 1273 if (src.first()->is_stack()) {
goetz@6458 1274 if (dst.first()->is_stack()) {
goetz@6458 1275 // stack to stack
goetz@6458 1276 __ lwa(r_temp, reg2offset(src.first()), r_caller_sp);
goetz@6458 1277 __ std(r_temp, reg2offset(dst.first()), R1_SP);
goetz@6458 1278 } else {
goetz@6458 1279 // stack to reg
goetz@6458 1280 __ lwa(dst.first()->as_Register(), reg2offset(src.first()), r_caller_sp);
goetz@6458 1281 }
goetz@6458 1282 } else if (dst.first()->is_stack()) {
goetz@6458 1283 // reg to stack
goetz@6458 1284 __ extsw(r_temp, src.first()->as_Register());
goetz@6458 1285 __ std(r_temp, reg2offset(dst.first()), R1_SP);
goetz@6458 1286 } else {
goetz@6458 1287 // reg to reg
goetz@6458 1288 __ extsw(dst.first()->as_Register(), src.first()->as_Register());
goetz@6458 1289 }
goetz@6458 1290 }
goetz@6458 1291
goetz@6458 1292 static void long_move(MacroAssembler*masm,
goetz@6458 1293 VMRegPair src, VMRegPair dst,
goetz@6458 1294 Register r_caller_sp, Register r_temp) {
goetz@6458 1295 assert(src.first()->is_valid() && src.second() == src.first()->next(), "incoming must be long");
goetz@6458 1296 assert(dst.first()->is_valid() && dst.second() == dst.first()->next(), "outgoing must be long");
goetz@6458 1297
goetz@6458 1298 if (src.first()->is_stack()) {
goetz@6458 1299 if (dst.first()->is_stack()) {
goetz@6458 1300 // stack to stack
goetz@6458 1301 __ ld( r_temp, reg2offset(src.first()), r_caller_sp);
goetz@6458 1302 __ std(r_temp, reg2offset(dst.first()), R1_SP);
goetz@6458 1303 } else {
goetz@6458 1304 // stack to reg
goetz@6458 1305 __ ld(dst.first()->as_Register(), reg2offset(src.first()), r_caller_sp);
goetz@6458 1306 }
goetz@6458 1307 } else if (dst.first()->is_stack()) {
goetz@6458 1308 // reg to stack
goetz@6458 1309 __ std(src.first()->as_Register(), reg2offset(dst.first()), R1_SP);
goetz@6458 1310 } else {
goetz@6458 1311 // reg to reg
goetz@6458 1312 if (dst.first()->as_Register() != src.first()->as_Register())
goetz@6458 1313 __ mr(dst.first()->as_Register(), src.first()->as_Register());
goetz@6458 1314 }
goetz@6458 1315 }
goetz@6458 1316
goetz@6458 1317 static void float_move(MacroAssembler*masm,
goetz@6458 1318 VMRegPair src, VMRegPair dst,
goetz@6458 1319 Register r_caller_sp, Register r_temp) {
goetz@6458 1320 assert(src.first()->is_valid() && !src.second()->is_valid(), "incoming must be float");
goetz@6458 1321 assert(dst.first()->is_valid() && !dst.second()->is_valid(), "outgoing must be float");
goetz@6458 1322
goetz@6458 1323 if (src.first()->is_stack()) {
goetz@6458 1324 if (dst.first()->is_stack()) {
goetz@6458 1325 // stack to stack
goetz@6458 1326 __ lwz(r_temp, reg2offset(src.first()), r_caller_sp);
goetz@6458 1327 __ stw(r_temp, reg2offset(dst.first()), R1_SP);
goetz@6458 1328 } else {
goetz@6458 1329 // stack to reg
goetz@6458 1330 __ lfs(dst.first()->as_FloatRegister(), reg2offset(src.first()), r_caller_sp);
goetz@6458 1331 }
goetz@6458 1332 } else if (dst.first()->is_stack()) {
goetz@6458 1333 // reg to stack
goetz@6458 1334 __ stfs(src.first()->as_FloatRegister(), reg2offset(dst.first()), R1_SP);
goetz@6458 1335 } else {
goetz@6458 1336 // reg to reg
goetz@6458 1337 if (dst.first()->as_FloatRegister() != src.first()->as_FloatRegister())
goetz@6458 1338 __ fmr(dst.first()->as_FloatRegister(), src.first()->as_FloatRegister());
goetz@6458 1339 }
goetz@6458 1340 }
goetz@6458 1341
goetz@6458 1342 static void double_move(MacroAssembler*masm,
goetz@6458 1343 VMRegPair src, VMRegPair dst,
goetz@6458 1344 Register r_caller_sp, Register r_temp) {
goetz@6458 1345 assert(src.first()->is_valid() && src.second() == src.first()->next(), "incoming must be double");
goetz@6458 1346 assert(dst.first()->is_valid() && dst.second() == dst.first()->next(), "outgoing must be double");
goetz@6458 1347
goetz@6458 1348 if (src.first()->is_stack()) {
goetz@6458 1349 if (dst.first()->is_stack()) {
goetz@6458 1350 // stack to stack
goetz@6458 1351 __ ld( r_temp, reg2offset(src.first()), r_caller_sp);
goetz@6458 1352 __ std(r_temp, reg2offset(dst.first()), R1_SP);
goetz@6458 1353 } else {
goetz@6458 1354 // stack to reg
goetz@6458 1355 __ lfd(dst.first()->as_FloatRegister(), reg2offset(src.first()), r_caller_sp);
goetz@6458 1356 }
goetz@6458 1357 } else if (dst.first()->is_stack()) {
goetz@6458 1358 // reg to stack
goetz@6458 1359 __ stfd(src.first()->as_FloatRegister(), reg2offset(dst.first()), R1_SP);
goetz@6458 1360 } else {
goetz@6458 1361 // reg to reg
goetz@6458 1362 if (dst.first()->as_FloatRegister() != src.first()->as_FloatRegister())
goetz@6458 1363 __ fmr(dst.first()->as_FloatRegister(), src.first()->as_FloatRegister());
goetz@6458 1364 }
goetz@6458 1365 }
goetz@6458 1366
goetz@6458 1367 void SharedRuntime::save_native_result(MacroAssembler *masm, BasicType ret_type, int frame_slots) {
goetz@6458 1368 switch (ret_type) {
goetz@6458 1369 case T_BOOLEAN:
goetz@6458 1370 case T_CHAR:
goetz@6458 1371 case T_BYTE:
goetz@6458 1372 case T_SHORT:
goetz@6458 1373 case T_INT:
goetz@6458 1374 __ stw (R3_RET, frame_slots*VMRegImpl::stack_slot_size, R1_SP);
goetz@6458 1375 break;
goetz@6458 1376 case T_ARRAY:
goetz@6458 1377 case T_OBJECT:
goetz@6458 1378 case T_LONG:
goetz@6458 1379 __ std (R3_RET, frame_slots*VMRegImpl::stack_slot_size, R1_SP);
goetz@6458 1380 break;
goetz@6458 1381 case T_FLOAT:
goetz@6458 1382 __ stfs(F1_RET, frame_slots*VMRegImpl::stack_slot_size, R1_SP);
goetz@6458 1383 break;
goetz@6458 1384 case T_DOUBLE:
goetz@6458 1385 __ stfd(F1_RET, frame_slots*VMRegImpl::stack_slot_size, R1_SP);
goetz@6458 1386 break;
goetz@6458 1387 case T_VOID:
goetz@6458 1388 break;
goetz@6458 1389 default:
goetz@6458 1390 ShouldNotReachHere();
goetz@6458 1391 break;
goetz@6458 1392 }
goetz@6458 1393 }
goetz@6458 1394
goetz@6458 1395 void SharedRuntime::restore_native_result(MacroAssembler *masm, BasicType ret_type, int frame_slots) {
goetz@6458 1396 switch (ret_type) {
goetz@6458 1397 case T_BOOLEAN:
goetz@6458 1398 case T_CHAR:
goetz@6458 1399 case T_BYTE:
goetz@6458 1400 case T_SHORT:
goetz@6458 1401 case T_INT:
goetz@6458 1402 __ lwz(R3_RET, frame_slots*VMRegImpl::stack_slot_size, R1_SP);
goetz@6458 1403 break;
goetz@6458 1404 case T_ARRAY:
goetz@6458 1405 case T_OBJECT:
goetz@6458 1406 case T_LONG:
goetz@6458 1407 __ ld (R3_RET, frame_slots*VMRegImpl::stack_slot_size, R1_SP);
goetz@6458 1408 break;
goetz@6458 1409 case T_FLOAT:
goetz@6458 1410 __ lfs(F1_RET, frame_slots*VMRegImpl::stack_slot_size, R1_SP);
goetz@6458 1411 break;
goetz@6458 1412 case T_DOUBLE:
goetz@6458 1413 __ lfd(F1_RET, frame_slots*VMRegImpl::stack_slot_size, R1_SP);
goetz@6458 1414 break;
goetz@6458 1415 case T_VOID:
goetz@6458 1416 break;
goetz@6458 1417 default:
goetz@6458 1418 ShouldNotReachHere();
goetz@6458 1419 break;
goetz@6458 1420 }
goetz@6458 1421 }
goetz@6458 1422
goetz@6458 1423 static void save_or_restore_arguments(MacroAssembler* masm,
goetz@6458 1424 const int stack_slots,
goetz@6458 1425 const int total_in_args,
goetz@6458 1426 const int arg_save_area,
goetz@6458 1427 OopMap* map,
goetz@6458 1428 VMRegPair* in_regs,
goetz@6458 1429 BasicType* in_sig_bt) {
goetz@6458 1430 // If map is non-NULL then the code should store the values,
goetz@6458 1431 // otherwise it should load them.
goetz@6458 1432 int slot = arg_save_area;
goetz@6458 1433 // Save down double word first.
goetz@6458 1434 for (int i = 0; i < total_in_args; i++) {
goetz@6458 1435 if (in_regs[i].first()->is_FloatRegister() && in_sig_bt[i] == T_DOUBLE) {
goetz@6458 1436 int offset = slot * VMRegImpl::stack_slot_size;
goetz@6458 1437 slot += VMRegImpl::slots_per_word;
goetz@6458 1438 assert(slot <= stack_slots, "overflow (after DOUBLE stack slot)");
goetz@6458 1439 if (map != NULL) {
goetz@6458 1440 __ stfd(in_regs[i].first()->as_FloatRegister(), offset, R1_SP);
goetz@6458 1441 } else {
goetz@6458 1442 __ lfd(in_regs[i].first()->as_FloatRegister(), offset, R1_SP);
goetz@6458 1443 }
goetz@6458 1444 } else if (in_regs[i].first()->is_Register() &&
goetz@6458 1445 (in_sig_bt[i] == T_LONG || in_sig_bt[i] == T_ARRAY)) {
goetz@6458 1446 int offset = slot * VMRegImpl::stack_slot_size;
goetz@6458 1447 if (map != NULL) {
goetz@6458 1448 __ std(in_regs[i].first()->as_Register(), offset, R1_SP);
goetz@6458 1449 if (in_sig_bt[i] == T_ARRAY) {
goetz@6458 1450 map->set_oop(VMRegImpl::stack2reg(slot));
goetz@6458 1451 }
goetz@6458 1452 } else {
goetz@6458 1453 __ ld(in_regs[i].first()->as_Register(), offset, R1_SP);
goetz@6458 1454 }
goetz@6458 1455 slot += VMRegImpl::slots_per_word;
goetz@6458 1456 assert(slot <= stack_slots, "overflow (after LONG/ARRAY stack slot)");
goetz@6458 1457 }
goetz@6458 1458 }
goetz@6458 1459 // Save or restore single word registers.
goetz@6458 1460 for (int i = 0; i < total_in_args; i++) {
goetz@6458 1461 // PPC64: pass ints as longs: must only deal with floats here.
goetz@6458 1462 if (in_regs[i].first()->is_FloatRegister()) {
goetz@6458 1463 if (in_sig_bt[i] == T_FLOAT) {
goetz@6458 1464 int offset = slot * VMRegImpl::stack_slot_size;
goetz@6458 1465 slot++;
goetz@6458 1466 assert(slot <= stack_slots, "overflow (after FLOAT stack slot)");
goetz@6458 1467 if (map != NULL) {
goetz@6458 1468 __ stfs(in_regs[i].first()->as_FloatRegister(), offset, R1_SP);
goetz@6458 1469 } else {
goetz@6458 1470 __ lfs(in_regs[i].first()->as_FloatRegister(), offset, R1_SP);
goetz@6458 1471 }
goetz@6458 1472 }
goetz@6458 1473 } else if (in_regs[i].first()->is_stack()) {
goetz@6458 1474 if (in_sig_bt[i] == T_ARRAY && map != NULL) {
goetz@6458 1475 int offset_in_older_frame = in_regs[i].first()->reg2stack() + SharedRuntime::out_preserve_stack_slots();
goetz@6458 1476 map->set_oop(VMRegImpl::stack2reg(offset_in_older_frame + stack_slots));
goetz@6458 1477 }
goetz@6458 1478 }
goetz@6458 1479 }
goetz@6458 1480 }
goetz@6458 1481
goetz@6458 1482 // Check GC_locker::needs_gc and enter the runtime if it's true. This
goetz@6458 1483 // keeps a new JNI critical region from starting until a GC has been
goetz@6458 1484 // forced. Save down any oops in registers and describe them in an
goetz@6458 1485 // OopMap.
goetz@6458 1486 static void check_needs_gc_for_critical_native(MacroAssembler* masm,
goetz@6458 1487 const int stack_slots,
goetz@6458 1488 const int total_in_args,
goetz@6458 1489 const int arg_save_area,
goetz@6458 1490 OopMapSet* oop_maps,
goetz@6458 1491 VMRegPair* in_regs,
goetz@6458 1492 BasicType* in_sig_bt,
goetz@6458 1493 Register tmp_reg ) {
goetz@6458 1494 __ block_comment("check GC_locker::needs_gc");
goetz@6458 1495 Label cont;
goetz@6458 1496 __ lbz(tmp_reg, (RegisterOrConstant)(intptr_t)GC_locker::needs_gc_address());
goetz@6458 1497 __ cmplwi(CCR0, tmp_reg, 0);
goetz@6458 1498 __ beq(CCR0, cont);
goetz@6458 1499
goetz@6458 1500 // Save down any values that are live in registers and call into the
goetz@6458 1501 // runtime to halt for a GC.
goetz@6458 1502 OopMap* map = new OopMap(stack_slots * 2, 0 /* arg_slots*/);
goetz@6458 1503 save_or_restore_arguments(masm, stack_slots, total_in_args,
goetz@6458 1504 arg_save_area, map, in_regs, in_sig_bt);
goetz@6458 1505
goetz@6458 1506 __ mr(R3_ARG1, R16_thread);
goetz@6458 1507 __ set_last_Java_frame(R1_SP, noreg);
goetz@6458 1508
goetz@6458 1509 __ block_comment("block_for_jni_critical");
goetz@6458 1510 address entry_point = CAST_FROM_FN_PTR(address, SharedRuntime::block_for_jni_critical);
goetz@6511 1511 #if defined(ABI_ELFv2)
goetz@6511 1512 __ call_c(entry_point, relocInfo::runtime_call_type);
goetz@6511 1513 #else
goetz@6458 1514 __ call_c(CAST_FROM_FN_PTR(FunctionDescriptor*, entry_point), relocInfo::runtime_call_type);
goetz@6511 1515 #endif
goetz@6458 1516 address start = __ pc() - __ offset(),
goetz@6458 1517 calls_return_pc = __ last_calls_return_pc();
goetz@6458 1518 oop_maps->add_gc_map(calls_return_pc - start, map);
goetz@6458 1519
goetz@6458 1520 __ reset_last_Java_frame();
goetz@6458 1521
goetz@6458 1522 // Reload all the register arguments.
goetz@6458 1523 save_or_restore_arguments(masm, stack_slots, total_in_args,
goetz@6458 1524 arg_save_area, NULL, in_regs, in_sig_bt);
goetz@6458 1525
goetz@6458 1526 __ BIND(cont);
goetz@6458 1527
goetz@6458 1528 #ifdef ASSERT
goetz@6458 1529 if (StressCriticalJNINatives) {
goetz@6458 1530 // Stress register saving.
goetz@6458 1531 OopMap* map = new OopMap(stack_slots * 2, 0 /* arg_slots*/);
goetz@6458 1532 save_or_restore_arguments(masm, stack_slots, total_in_args,
goetz@6458 1533 arg_save_area, map, in_regs, in_sig_bt);
goetz@6458 1534 // Destroy argument registers.
goetz@6458 1535 for (int i = 0; i < total_in_args; i++) {
goetz@6458 1536 if (in_regs[i].first()->is_Register()) {
goetz@6458 1537 const Register reg = in_regs[i].first()->as_Register();
goetz@6458 1538 __ neg(reg, reg);
goetz@6458 1539 } else if (in_regs[i].first()->is_FloatRegister()) {
goetz@6458 1540 __ fneg(in_regs[i].first()->as_FloatRegister(), in_regs[i].first()->as_FloatRegister());
goetz@6458 1541 }
goetz@6458 1542 }
goetz@6458 1543
goetz@6458 1544 save_or_restore_arguments(masm, stack_slots, total_in_args,
goetz@6458 1545 arg_save_area, NULL, in_regs, in_sig_bt);
goetz@6458 1546 }
goetz@6458 1547 #endif
goetz@6458 1548 }
goetz@6458 1549
goetz@6458 1550 static void move_ptr(MacroAssembler* masm, VMRegPair src, VMRegPair dst, Register r_caller_sp, Register r_temp) {
goetz@6458 1551 if (src.first()->is_stack()) {
goetz@6458 1552 if (dst.first()->is_stack()) {
goetz@6458 1553 // stack to stack
goetz@6458 1554 __ ld(r_temp, reg2offset(src.first()), r_caller_sp);
goetz@6458 1555 __ std(r_temp, reg2offset(dst.first()), R1_SP);
goetz@6458 1556 } else {
goetz@6458 1557 // stack to reg
goetz@6458 1558 __ ld(dst.first()->as_Register(), reg2offset(src.first()), r_caller_sp);
goetz@6458 1559 }
goetz@6458 1560 } else if (dst.first()->is_stack()) {
goetz@6458 1561 // reg to stack
goetz@6458 1562 __ std(src.first()->as_Register(), reg2offset(dst.first()), R1_SP);
goetz@6458 1563 } else {
goetz@6458 1564 if (dst.first() != src.first()) {
goetz@6458 1565 __ mr(dst.first()->as_Register(), src.first()->as_Register());
goetz@6458 1566 }
goetz@6458 1567 }
goetz@6458 1568 }
goetz@6458 1569
goetz@6458 1570 // Unpack an array argument into a pointer to the body and the length
goetz@6458 1571 // if the array is non-null, otherwise pass 0 for both.
goetz@6458 1572 static void unpack_array_argument(MacroAssembler* masm, VMRegPair reg, BasicType in_elem_type,
goetz@6458 1573 VMRegPair body_arg, VMRegPair length_arg, Register r_caller_sp,
goetz@6458 1574 Register tmp_reg, Register tmp2_reg) {
goetz@6458 1575 assert(!body_arg.first()->is_Register() || body_arg.first()->as_Register() != tmp_reg,
goetz@6458 1576 "possible collision");
goetz@6458 1577 assert(!length_arg.first()->is_Register() || length_arg.first()->as_Register() != tmp_reg,
goetz@6458 1578 "possible collision");
goetz@6458 1579
goetz@6458 1580 // Pass the length, ptr pair.
goetz@6458 1581 Label set_out_args;
goetz@6458 1582 VMRegPair tmp, tmp2;
goetz@6458 1583 tmp.set_ptr(tmp_reg->as_VMReg());
goetz@6458 1584 tmp2.set_ptr(tmp2_reg->as_VMReg());
goetz@6458 1585 if (reg.first()->is_stack()) {
goetz@6458 1586 // Load the arg up from the stack.
goetz@6458 1587 move_ptr(masm, reg, tmp, r_caller_sp, /*unused*/ R0);
goetz@6458 1588 reg = tmp;
goetz@6458 1589 }
goetz@6458 1590 __ li(tmp2_reg, 0); // Pass zeros if Array=null.
goetz@6458 1591 if (tmp_reg != reg.first()->as_Register()) __ li(tmp_reg, 0);
goetz@6458 1592 __ cmpdi(CCR0, reg.first()->as_Register(), 0);
goetz@6458 1593 __ beq(CCR0, set_out_args);
goetz@6458 1594 __ lwa(tmp2_reg, arrayOopDesc::length_offset_in_bytes(), reg.first()->as_Register());
goetz@6458 1595 __ addi(tmp_reg, reg.first()->as_Register(), arrayOopDesc::base_offset_in_bytes(in_elem_type));
goetz@6458 1596 __ bind(set_out_args);
goetz@6458 1597 move_ptr(masm, tmp, body_arg, r_caller_sp, /*unused*/ R0);
goetz@6458 1598 move_ptr(masm, tmp2, length_arg, r_caller_sp, /*unused*/ R0); // Same as move32_64 on PPC64.
goetz@6458 1599 }
goetz@6458 1600
goetz@6458 1601 static void verify_oop_args(MacroAssembler* masm,
goetz@6458 1602 methodHandle method,
goetz@6458 1603 const BasicType* sig_bt,
goetz@6458 1604 const VMRegPair* regs) {
goetz@6458 1605 Register temp_reg = R19_method; // not part of any compiled calling seq
goetz@6458 1606 if (VerifyOops) {
goetz@6458 1607 for (int i = 0; i < method->size_of_parameters(); i++) {
goetz@6458 1608 if (sig_bt[i] == T_OBJECT ||
goetz@6458 1609 sig_bt[i] == T_ARRAY) {
goetz@6458 1610 VMReg r = regs[i].first();
goetz@6458 1611 assert(r->is_valid(), "bad oop arg");
goetz@6458 1612 if (r->is_stack()) {
goetz@6458 1613 __ ld(temp_reg, reg2offset(r), R1_SP);
goetz@6458 1614 __ verify_oop(temp_reg);
goetz@6458 1615 } else {
goetz@6458 1616 __ verify_oop(r->as_Register());
goetz@6458 1617 }
goetz@6458 1618 }
goetz@6458 1619 }
goetz@6458 1620 }
goetz@6458 1621 }
goetz@6458 1622
goetz@6458 1623 static void gen_special_dispatch(MacroAssembler* masm,
goetz@6458 1624 methodHandle method,
goetz@6458 1625 const BasicType* sig_bt,
goetz@6458 1626 const VMRegPair* regs) {
goetz@6458 1627 verify_oop_args(masm, method, sig_bt, regs);
goetz@6458 1628 vmIntrinsics::ID iid = method->intrinsic_id();
goetz@6458 1629
goetz@6458 1630 // Now write the args into the outgoing interpreter space
goetz@6458 1631 bool has_receiver = false;
goetz@6458 1632 Register receiver_reg = noreg;
goetz@6458 1633 int member_arg_pos = -1;
goetz@6458 1634 Register member_reg = noreg;
goetz@6458 1635 int ref_kind = MethodHandles::signature_polymorphic_intrinsic_ref_kind(iid);
goetz@6458 1636 if (ref_kind != 0) {
goetz@6458 1637 member_arg_pos = method->size_of_parameters() - 1; // trailing MemberName argument
goetz@6458 1638 member_reg = R19_method; // known to be free at this point
goetz@6458 1639 has_receiver = MethodHandles::ref_kind_has_receiver(ref_kind);
goetz@6458 1640 } else if (iid == vmIntrinsics::_invokeBasic) {
goetz@6458 1641 has_receiver = true;
goetz@6458 1642 } else {
goetz@6458 1643 fatal(err_msg_res("unexpected intrinsic id %d", iid));
goetz@6458 1644 }
goetz@6458 1645
goetz@6458 1646 if (member_reg != noreg) {
goetz@6458 1647 // Load the member_arg into register, if necessary.
goetz@6458 1648 SharedRuntime::check_member_name_argument_is_last_argument(method, sig_bt, regs);
goetz@6458 1649 VMReg r = regs[member_arg_pos].first();
goetz@6458 1650 if (r->is_stack()) {
goetz@6458 1651 __ ld(member_reg, reg2offset(r), R1_SP);
goetz@6458 1652 } else {
goetz@6458 1653 // no data motion is needed
goetz@6458 1654 member_reg = r->as_Register();
goetz@6458 1655 }
goetz@6458 1656 }
goetz@6458 1657
goetz@6458 1658 if (has_receiver) {
goetz@6458 1659 // Make sure the receiver is loaded into a register.
goetz@6458 1660 assert(method->size_of_parameters() > 0, "oob");
goetz@6458 1661 assert(sig_bt[0] == T_OBJECT, "receiver argument must be an object");
goetz@6458 1662 VMReg r = regs[0].first();
goetz@6458 1663 assert(r->is_valid(), "bad receiver arg");
goetz@6458 1664 if (r->is_stack()) {
goetz@6458 1665 // Porting note: This assumes that compiled calling conventions always
goetz@6458 1666 // pass the receiver oop in a register. If this is not true on some
goetz@6458 1667 // platform, pick a temp and load the receiver from stack.
goetz@6458 1668 fatal("receiver always in a register");
goetz@6458 1669 receiver_reg = R11_scratch1; // TODO (hs24): is R11_scratch1 really free at this point?
goetz@6458 1670 __ ld(receiver_reg, reg2offset(r), R1_SP);
goetz@6458 1671 } else {
goetz@6458 1672 // no data motion is needed
goetz@6458 1673 receiver_reg = r->as_Register();
goetz@6458 1674 }
goetz@6458 1675 }
goetz@6458 1676
goetz@6458 1677 // Figure out which address we are really jumping to:
goetz@6458 1678 MethodHandles::generate_method_handle_dispatch(masm, iid,
goetz@6458 1679 receiver_reg, member_reg, /*for_compiler_entry:*/ true);
goetz@6458 1680 }
goetz@6458 1681
goetz@6458 1682 #endif // COMPILER2
goetz@6458 1683
goetz@6458 1684 // ---------------------------------------------------------------------------
goetz@6458 1685 // Generate a native wrapper for a given method. The method takes arguments
goetz@6458 1686 // in the Java compiled code convention, marshals them to the native
goetz@6458 1687 // convention (handlizes oops, etc), transitions to native, makes the call,
goetz@6458 1688 // returns to java state (possibly blocking), unhandlizes any result and
goetz@6458 1689 // returns.
goetz@6458 1690 //
goetz@6458 1691 // Critical native functions are a shorthand for the use of
goetz@6458 1692 // GetPrimtiveArrayCritical and disallow the use of any other JNI
goetz@6458 1693 // functions. The wrapper is expected to unpack the arguments before
goetz@6458 1694 // passing them to the callee and perform checks before and after the
goetz@6458 1695 // native call to ensure that they GC_locker
goetz@6458 1696 // lock_critical/unlock_critical semantics are followed. Some other
goetz@6458 1697 // parts of JNI setup are skipped like the tear down of the JNI handle
goetz@6458 1698 // block and the check for pending exceptions it's impossible for them
goetz@6458 1699 // to be thrown.
goetz@6458 1700 //
goetz@6458 1701 // They are roughly structured like this:
goetz@6458 1702 // if (GC_locker::needs_gc())
goetz@6458 1703 // SharedRuntime::block_for_jni_critical();
goetz@6458 1704 // tranistion to thread_in_native
goetz@6458 1705 // unpack arrray arguments and call native entry point
goetz@6458 1706 // check for safepoint in progress
goetz@6458 1707 // check if any thread suspend flags are set
goetz@6458 1708 // call into JVM and possible unlock the JNI critical
goetz@6458 1709 // if a GC was suppressed while in the critical native.
goetz@6458 1710 // transition back to thread_in_Java
goetz@6458 1711 // return to caller
goetz@6458 1712 //
goetz@6458 1713 nmethod *SharedRuntime::generate_native_wrapper(MacroAssembler *masm,
goetz@6458 1714 methodHandle method,
goetz@6458 1715 int compile_id,
goetz@6458 1716 BasicType *in_sig_bt,
goetz@6458 1717 VMRegPair *in_regs,
goetz@6458 1718 BasicType ret_type) {
goetz@6458 1719 #ifdef COMPILER2
goetz@6458 1720 if (method->is_method_handle_intrinsic()) {
goetz@6458 1721 vmIntrinsics::ID iid = method->intrinsic_id();
goetz@6458 1722 intptr_t start = (intptr_t)__ pc();
goetz@6458 1723 int vep_offset = ((intptr_t)__ pc()) - start;
goetz@6458 1724 gen_special_dispatch(masm,
goetz@6458 1725 method,
goetz@6458 1726 in_sig_bt,
goetz@6458 1727 in_regs);
goetz@6458 1728 int frame_complete = ((intptr_t)__ pc()) - start; // not complete, period
goetz@6458 1729 __ flush();
goetz@6458 1730 int stack_slots = SharedRuntime::out_preserve_stack_slots(); // no out slots at all, actually
goetz@6458 1731 return nmethod::new_native_nmethod(method,
goetz@6458 1732 compile_id,
goetz@6458 1733 masm->code(),
goetz@6458 1734 vep_offset,
goetz@6458 1735 frame_complete,
goetz@6458 1736 stack_slots / VMRegImpl::slots_per_word,
goetz@6458 1737 in_ByteSize(-1),
goetz@6458 1738 in_ByteSize(-1),
goetz@6458 1739 (OopMapSet*)NULL);
goetz@6458 1740 }
goetz@6458 1741
goetz@6458 1742 bool is_critical_native = true;
goetz@6458 1743 address native_func = method->critical_native_function();
goetz@6458 1744 if (native_func == NULL) {
goetz@6458 1745 native_func = method->native_function();
goetz@6458 1746 is_critical_native = false;
goetz@6458 1747 }
goetz@6458 1748 assert(native_func != NULL, "must have function");
goetz@6458 1749
goetz@6458 1750 // First, create signature for outgoing C call
goetz@6458 1751 // --------------------------------------------------------------------------
goetz@6458 1752
goetz@6458 1753 int total_in_args = method->size_of_parameters();
goetz@6458 1754 // We have received a description of where all the java args are located
goetz@6458 1755 // on entry to the wrapper. We need to convert these args to where
goetz@6458 1756 // the jni function will expect them. To figure out where they go
goetz@6458 1757 // we convert the java signature to a C signature by inserting
goetz@6458 1758 // the hidden arguments as arg[0] and possibly arg[1] (static method)
goetz@6458 1759 //
goetz@6458 1760 // Additionally, on ppc64 we must convert integers to longs in the C
goetz@6458 1761 // signature. We do this in advance in order to have no trouble with
goetz@6458 1762 // indexes into the bt-arrays.
goetz@6458 1763 // So convert the signature and registers now, and adjust the total number
goetz@6458 1764 // of in-arguments accordingly.
goetz@6458 1765 int i2l_argcnt = convert_ints_to_longints_argcnt(total_in_args, in_sig_bt); // PPC64: pass ints as longs.
goetz@6458 1766
goetz@6458 1767 // Calculate the total number of C arguments and create arrays for the
goetz@6458 1768 // signature and the outgoing registers.
goetz@6458 1769 // On ppc64, we have two arrays for the outgoing registers, because
goetz@6458 1770 // some floating-point arguments must be passed in registers _and_
goetz@6458 1771 // in stack locations.
goetz@6458 1772 bool method_is_static = method->is_static();
goetz@6458 1773 int total_c_args = i2l_argcnt;
goetz@6458 1774
goetz@6458 1775 if (!is_critical_native) {
goetz@6458 1776 int n_hidden_args = method_is_static ? 2 : 1;
goetz@6458 1777 total_c_args += n_hidden_args;
goetz@6458 1778 } else {
goetz@6458 1779 // No JNIEnv*, no this*, but unpacked arrays (base+length).
goetz@6458 1780 for (int i = 0; i < total_in_args; i++) {
goetz@6458 1781 if (in_sig_bt[i] == T_ARRAY) {
goetz@6458 1782 total_c_args += 2; // PPC64: T_LONG, T_INT, T_ADDRESS (see convert_ints_to_longints and c_calling_convention)
goetz@6458 1783 }
goetz@6458 1784 }
goetz@6458 1785 }
goetz@6458 1786
goetz@6458 1787 BasicType *out_sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_c_args);
goetz@6458 1788 VMRegPair *out_regs = NEW_RESOURCE_ARRAY(VMRegPair, total_c_args);
goetz@6458 1789 VMRegPair *out_regs2 = NEW_RESOURCE_ARRAY(VMRegPair, total_c_args);
goetz@6458 1790 BasicType* in_elem_bt = NULL;
goetz@6458 1791
goetz@6458 1792 // Create the signature for the C call:
goetz@6458 1793 // 1) add the JNIEnv*
goetz@6458 1794 // 2) add the class if the method is static
goetz@6458 1795 // 3) copy the rest of the incoming signature (shifted by the number of
goetz@6458 1796 // hidden arguments).
goetz@6458 1797
goetz@6458 1798 int argc = 0;
goetz@6458 1799 if (!is_critical_native) {
goetz@6458 1800 convert_ints_to_longints(i2l_argcnt, total_in_args, in_sig_bt, in_regs); // PPC64: pass ints as longs.
goetz@6458 1801
goetz@6458 1802 out_sig_bt[argc++] = T_ADDRESS;
goetz@6458 1803 if (method->is_static()) {
goetz@6458 1804 out_sig_bt[argc++] = T_OBJECT;
goetz@6458 1805 }
goetz@6458 1806
goetz@6458 1807 for (int i = 0; i < total_in_args ; i++ ) {
goetz@6458 1808 out_sig_bt[argc++] = in_sig_bt[i];
goetz@6458 1809 }
goetz@6458 1810 } else {
goetz@6458 1811 Thread* THREAD = Thread::current();
goetz@6458 1812 in_elem_bt = NEW_RESOURCE_ARRAY(BasicType, i2l_argcnt);
goetz@6458 1813 SignatureStream ss(method->signature());
goetz@6458 1814 int o = 0;
goetz@6458 1815 for (int i = 0; i < total_in_args ; i++, o++) {
goetz@6458 1816 if (in_sig_bt[i] == T_ARRAY) {
goetz@6458 1817 // Arrays are passed as int, elem* pair
goetz@6458 1818 Symbol* atype = ss.as_symbol(CHECK_NULL);
goetz@6458 1819 const char* at = atype->as_C_string();
goetz@6458 1820 if (strlen(at) == 2) {
goetz@6458 1821 assert(at[0] == '[', "must be");
goetz@6458 1822 switch (at[1]) {
goetz@6458 1823 case 'B': in_elem_bt[o] = T_BYTE; break;
goetz@6458 1824 case 'C': in_elem_bt[o] = T_CHAR; break;
goetz@6458 1825 case 'D': in_elem_bt[o] = T_DOUBLE; break;
goetz@6458 1826 case 'F': in_elem_bt[o] = T_FLOAT; break;
goetz@6458 1827 case 'I': in_elem_bt[o] = T_INT; break;
goetz@6458 1828 case 'J': in_elem_bt[o] = T_LONG; break;
goetz@6458 1829 case 'S': in_elem_bt[o] = T_SHORT; break;
goetz@6458 1830 case 'Z': in_elem_bt[o] = T_BOOLEAN; break;
goetz@6458 1831 default: ShouldNotReachHere();
goetz@6458 1832 }
goetz@6458 1833 }
goetz@6458 1834 } else {
goetz@6458 1835 in_elem_bt[o] = T_VOID;
goetz@6458 1836 switch(in_sig_bt[i]) { // PPC64: pass ints as longs.
goetz@6458 1837 case T_BOOLEAN:
goetz@6458 1838 case T_CHAR:
goetz@6458 1839 case T_BYTE:
goetz@6458 1840 case T_SHORT:
goetz@6458 1841 case T_INT: in_elem_bt[++o] = T_VOID; break;
goetz@6458 1842 default: break;
goetz@6458 1843 }
goetz@6458 1844 }
goetz@6458 1845 if (in_sig_bt[i] != T_VOID) {
goetz@6458 1846 assert(in_sig_bt[i] == ss.type(), "must match");
goetz@6458 1847 ss.next();
goetz@6458 1848 }
goetz@6458 1849 }
goetz@6458 1850 assert(i2l_argcnt==o, "must match");
goetz@6458 1851
goetz@6458 1852 convert_ints_to_longints(i2l_argcnt, total_in_args, in_sig_bt, in_regs); // PPC64: pass ints as longs.
goetz@6458 1853
goetz@6458 1854 for (int i = 0; i < total_in_args ; i++ ) {
goetz@6458 1855 if (in_sig_bt[i] == T_ARRAY) {
goetz@6458 1856 // Arrays are passed as int, elem* pair.
goetz@6458 1857 out_sig_bt[argc++] = T_LONG; // PPC64: pass ints as longs.
goetz@6458 1858 out_sig_bt[argc++] = T_INT;
goetz@6458 1859 out_sig_bt[argc++] = T_ADDRESS;
goetz@6458 1860 } else {
goetz@6458 1861 out_sig_bt[argc++] = in_sig_bt[i];
goetz@6458 1862 }
goetz@6458 1863 }
goetz@6458 1864 }
goetz@6458 1865
goetz@6458 1866
goetz@6458 1867 // Compute the wrapper's frame size.
goetz@6458 1868 // --------------------------------------------------------------------------
goetz@6458 1869
goetz@6458 1870 // Now figure out where the args must be stored and how much stack space
goetz@6458 1871 // they require.
goetz@6458 1872 //
goetz@6458 1873 // Compute framesize for the wrapper. We need to handlize all oops in
goetz@6458 1874 // incoming registers.
goetz@6458 1875 //
goetz@6458 1876 // Calculate the total number of stack slots we will need:
goetz@6458 1877 // 1) abi requirements
goetz@6458 1878 // 2) outgoing arguments
goetz@6458 1879 // 3) space for inbound oop handle area
goetz@6458 1880 // 4) space for handlizing a klass if static method
goetz@6458 1881 // 5) space for a lock if synchronized method
goetz@6458 1882 // 6) workspace for saving return values, int <-> float reg moves, etc.
goetz@6458 1883 // 7) alignment
goetz@6458 1884 //
goetz@6458 1885 // Layout of the native wrapper frame:
goetz@6458 1886 // (stack grows upwards, memory grows downwards)
goetz@6458 1887 //
goetz@6511 1888 // NW [ABI_REG_ARGS] <-- 1) R1_SP
goetz@6458 1889 // [outgoing arguments] <-- 2) R1_SP + out_arg_slot_offset
goetz@6458 1890 // [oopHandle area] <-- 3) R1_SP + oop_handle_offset (save area for critical natives)
goetz@6458 1891 // klass <-- 4) R1_SP + klass_offset
goetz@6458 1892 // lock <-- 5) R1_SP + lock_offset
goetz@6458 1893 // [workspace] <-- 6) R1_SP + workspace_offset
goetz@6458 1894 // [alignment] (optional) <-- 7)
goetz@6458 1895 // caller [JIT_TOP_ABI_48] <-- r_callers_sp
goetz@6458 1896 //
goetz@6458 1897 // - *_slot_offset Indicates offset from SP in number of stack slots.
goetz@6458 1898 // - *_offset Indicates offset from SP in bytes.
goetz@6458 1899
goetz@6458 1900 int stack_slots = c_calling_convention(out_sig_bt, out_regs, out_regs2, total_c_args) // 1+2)
goetz@6458 1901 + SharedRuntime::out_preserve_stack_slots(); // See c_calling_convention.
goetz@6458 1902
goetz@6458 1903 // Now the space for the inbound oop handle area.
goetz@6458 1904 int total_save_slots = num_java_iarg_registers * VMRegImpl::slots_per_word;
goetz@6458 1905 if (is_critical_native) {
goetz@6458 1906 // Critical natives may have to call out so they need a save area
goetz@6458 1907 // for register arguments.
goetz@6458 1908 int double_slots = 0;
goetz@6458 1909 int single_slots = 0;
goetz@6458 1910 for (int i = 0; i < total_in_args; i++) {
goetz@6458 1911 if (in_regs[i].first()->is_Register()) {
goetz@6458 1912 const Register reg = in_regs[i].first()->as_Register();
goetz@6458 1913 switch (in_sig_bt[i]) {
goetz@6458 1914 case T_BOOLEAN:
goetz@6458 1915 case T_BYTE:
goetz@6458 1916 case T_SHORT:
goetz@6458 1917 case T_CHAR:
goetz@6458 1918 case T_INT: /*single_slots++;*/ break; // PPC64: pass ints as longs.
goetz@6458 1919 case T_ARRAY:
goetz@6458 1920 case T_LONG: double_slots++; break;
goetz@6458 1921 default: ShouldNotReachHere();
goetz@6458 1922 }
goetz@6458 1923 } else if (in_regs[i].first()->is_FloatRegister()) {
goetz@6458 1924 switch (in_sig_bt[i]) {
goetz@6458 1925 case T_FLOAT: single_slots++; break;
goetz@6458 1926 case T_DOUBLE: double_slots++; break;
goetz@6458 1927 default: ShouldNotReachHere();
goetz@6458 1928 }
goetz@6458 1929 }
goetz@6458 1930 }
goetz@6458 1931 total_save_slots = double_slots * 2 + round_to(single_slots, 2); // round to even
goetz@6458 1932 }
goetz@6458 1933
goetz@6458 1934 int oop_handle_slot_offset = stack_slots;
goetz@6458 1935 stack_slots += total_save_slots; // 3)
goetz@6458 1936
goetz@6458 1937 int klass_slot_offset = 0;
goetz@6458 1938 int klass_offset = -1;
goetz@6458 1939 if (method_is_static && !is_critical_native) { // 4)
goetz@6458 1940 klass_slot_offset = stack_slots;
goetz@6458 1941 klass_offset = klass_slot_offset * VMRegImpl::stack_slot_size;
goetz@6458 1942 stack_slots += VMRegImpl::slots_per_word;
goetz@6458 1943 }
goetz@6458 1944
goetz@6458 1945 int lock_slot_offset = 0;
goetz@6458 1946 int lock_offset = -1;
goetz@6458 1947 if (method->is_synchronized()) { // 5)
goetz@6458 1948 lock_slot_offset = stack_slots;
goetz@6458 1949 lock_offset = lock_slot_offset * VMRegImpl::stack_slot_size;
goetz@6458 1950 stack_slots += VMRegImpl::slots_per_word;
goetz@6458 1951 }
goetz@6458 1952
goetz@6458 1953 int workspace_slot_offset = stack_slots; // 6)
goetz@6458 1954 stack_slots += 2;
goetz@6458 1955
goetz@6458 1956 // Now compute actual number of stack words we need.
goetz@6458 1957 // Rounding to make stack properly aligned.
goetz@6458 1958 stack_slots = round_to(stack_slots, // 7)
goetz@6458 1959 frame::alignment_in_bytes / VMRegImpl::stack_slot_size);
goetz@6458 1960 int frame_size_in_bytes = stack_slots * VMRegImpl::stack_slot_size;
goetz@6458 1961
goetz@6458 1962
goetz@6458 1963 // Now we can start generating code.
goetz@6458 1964 // --------------------------------------------------------------------------
goetz@6458 1965
goetz@6458 1966 intptr_t start_pc = (intptr_t)__ pc();
goetz@6458 1967 intptr_t vep_start_pc;
goetz@6458 1968 intptr_t frame_done_pc;
goetz@6458 1969 intptr_t oopmap_pc;
goetz@6458 1970
goetz@6458 1971 Label ic_miss;
goetz@6458 1972 Label handle_pending_exception;
goetz@6458 1973
goetz@6458 1974 Register r_callers_sp = R21;
goetz@6458 1975 Register r_temp_1 = R22;
goetz@6458 1976 Register r_temp_2 = R23;
goetz@6458 1977 Register r_temp_3 = R24;
goetz@6458 1978 Register r_temp_4 = R25;
goetz@6458 1979 Register r_temp_5 = R26;
goetz@6458 1980 Register r_temp_6 = R27;
goetz@6458 1981 Register r_return_pc = R28;
goetz@6458 1982
goetz@6458 1983 Register r_carg1_jnienv = noreg;
goetz@6458 1984 Register r_carg2_classorobject = noreg;
goetz@6458 1985 if (!is_critical_native) {
goetz@6458 1986 r_carg1_jnienv = out_regs[0].first()->as_Register();
goetz@6458 1987 r_carg2_classorobject = out_regs[1].first()->as_Register();
goetz@6458 1988 }
goetz@6458 1989
goetz@6458 1990
goetz@6458 1991 // Generate the Unverified Entry Point (UEP).
goetz@6458 1992 // --------------------------------------------------------------------------
goetz@6458 1993 assert(start_pc == (intptr_t)__ pc(), "uep must be at start");
goetz@6458 1994
goetz@6458 1995 // Check ic: object class == cached class?
goetz@6458 1996 if (!method_is_static) {
goetz@6458 1997 Register ic = as_Register(Matcher::inline_cache_reg_encode());
goetz@6458 1998 Register receiver_klass = r_temp_1;
goetz@6458 1999
goetz@6458 2000 __ cmpdi(CCR0, R3_ARG1, 0);
goetz@6458 2001 __ beq(CCR0, ic_miss);
goetz@6458 2002 __ verify_oop(R3_ARG1);
goetz@6458 2003 __ load_klass(receiver_klass, R3_ARG1);
goetz@6458 2004
goetz@6458 2005 __ cmpd(CCR0, receiver_klass, ic);
goetz@6458 2006 __ bne(CCR0, ic_miss);
goetz@6458 2007 }
goetz@6458 2008
goetz@6458 2009
goetz@6458 2010 // Generate the Verified Entry Point (VEP).
goetz@6458 2011 // --------------------------------------------------------------------------
goetz@6458 2012 vep_start_pc = (intptr_t)__ pc();
goetz@6458 2013
goetz@6458 2014 __ save_LR_CR(r_temp_1);
goetz@6458 2015 __ generate_stack_overflow_check(frame_size_in_bytes); // Check before creating frame.
goetz@6458 2016 __ mr(r_callers_sp, R1_SP); // Remember frame pointer.
goetz@6458 2017 __ push_frame(frame_size_in_bytes, r_temp_1); // Push the c2n adapter's frame.
goetz@6458 2018 frame_done_pc = (intptr_t)__ pc();
goetz@6458 2019
goetz@6458 2020 // Native nmethod wrappers never take possesion of the oop arguments.
goetz@6458 2021 // So the caller will gc the arguments.
goetz@6458 2022 // The only thing we need an oopMap for is if the call is static.
goetz@6458 2023 //
goetz@6458 2024 // An OopMap for lock (and class if static), and one for the VM call itself.
goetz@6458 2025 OopMapSet *oop_maps = new OopMapSet();
goetz@6458 2026 OopMap *oop_map = new OopMap(stack_slots * 2, 0 /* arg_slots*/);
goetz@6458 2027
goetz@6458 2028 if (is_critical_native) {
goetz@6458 2029 check_needs_gc_for_critical_native(masm, stack_slots, total_in_args, oop_handle_slot_offset, oop_maps, in_regs, in_sig_bt, r_temp_1);
goetz@6458 2030 }
goetz@6458 2031
goetz@6458 2032 // Move arguments from register/stack to register/stack.
goetz@6458 2033 // --------------------------------------------------------------------------
goetz@6458 2034 //
goetz@6458 2035 // We immediately shuffle the arguments so that for any vm call we have
goetz@6458 2036 // to make from here on out (sync slow path, jvmti, etc.) we will have
goetz@6458 2037 // captured the oops from our caller and have a valid oopMap for them.
goetz@6458 2038 //
goetz@6458 2039 // Natives require 1 or 2 extra arguments over the normal ones: the JNIEnv*
goetz@6458 2040 // (derived from JavaThread* which is in R16_thread) and, if static,
goetz@6458 2041 // the class mirror instead of a receiver. This pretty much guarantees that
goetz@6458 2042 // register layout will not match. We ignore these extra arguments during
goetz@6458 2043 // the shuffle. The shuffle is described by the two calling convention
goetz@6458 2044 // vectors we have in our possession. We simply walk the java vector to
goetz@6458 2045 // get the source locations and the c vector to get the destinations.
goetz@6458 2046
goetz@6458 2047 // Record sp-based slot for receiver on stack for non-static methods.
goetz@6458 2048 int receiver_offset = -1;
goetz@6458 2049
goetz@6458 2050 // We move the arguments backward because the floating point registers
goetz@6458 2051 // destination will always be to a register with a greater or equal
goetz@6458 2052 // register number or the stack.
goetz@6458 2053 // in is the index of the incoming Java arguments
goetz@6458 2054 // out is the index of the outgoing C arguments
goetz@6458 2055
goetz@6458 2056 #ifdef ASSERT
goetz@6458 2057 bool reg_destroyed[RegisterImpl::number_of_registers];
goetz@6458 2058 bool freg_destroyed[FloatRegisterImpl::number_of_registers];
goetz@6458 2059 for (int r = 0 ; r < RegisterImpl::number_of_registers ; r++) {
goetz@6458 2060 reg_destroyed[r] = false;
goetz@6458 2061 }
goetz@6458 2062 for (int f = 0 ; f < FloatRegisterImpl::number_of_registers ; f++) {
goetz@6458 2063 freg_destroyed[f] = false;
goetz@6458 2064 }
goetz@6458 2065 #endif // ASSERT
goetz@6458 2066
goetz@6458 2067 for (int in = total_in_args - 1, out = total_c_args - 1; in >= 0 ; in--, out--) {
goetz@6458 2068
goetz@6458 2069 #ifdef ASSERT
goetz@6458 2070 if (in_regs[in].first()->is_Register()) {
goetz@6458 2071 assert(!reg_destroyed[in_regs[in].first()->as_Register()->encoding()], "ack!");
goetz@6458 2072 } else if (in_regs[in].first()->is_FloatRegister()) {
goetz@6458 2073 assert(!freg_destroyed[in_regs[in].first()->as_FloatRegister()->encoding()], "ack!");
goetz@6458 2074 }
goetz@6458 2075 if (out_regs[out].first()->is_Register()) {
goetz@6458 2076 reg_destroyed[out_regs[out].first()->as_Register()->encoding()] = true;
goetz@6458 2077 } else if (out_regs[out].first()->is_FloatRegister()) {
goetz@6458 2078 freg_destroyed[out_regs[out].first()->as_FloatRegister()->encoding()] = true;
goetz@6458 2079 }
goetz@6458 2080 if (out_regs2[out].first()->is_Register()) {
goetz@6458 2081 reg_destroyed[out_regs2[out].first()->as_Register()->encoding()] = true;
goetz@6458 2082 } else if (out_regs2[out].first()->is_FloatRegister()) {
goetz@6458 2083 freg_destroyed[out_regs2[out].first()->as_FloatRegister()->encoding()] = true;
goetz@6458 2084 }
goetz@6458 2085 #endif // ASSERT
goetz@6458 2086
goetz@6458 2087 switch (in_sig_bt[in]) {
goetz@6458 2088 case T_BOOLEAN:
goetz@6458 2089 case T_CHAR:
goetz@6458 2090 case T_BYTE:
goetz@6458 2091 case T_SHORT:
goetz@6458 2092 case T_INT:
goetz@6458 2093 guarantee(in > 0 && in_sig_bt[in-1] == T_LONG,
goetz@6458 2094 "expecting type (T_LONG,bt) for bt in {T_BOOLEAN, T_CHAR, T_BYTE, T_SHORT, T_INT}");
goetz@6458 2095 break;
goetz@6458 2096 case T_LONG:
goetz@6458 2097 if (in_sig_bt[in+1] == T_VOID) {
goetz@6458 2098 long_move(masm, in_regs[in], out_regs[out], r_callers_sp, r_temp_1);
goetz@6458 2099 } else {
goetz@6458 2100 guarantee(in_sig_bt[in+1] == T_BOOLEAN || in_sig_bt[in+1] == T_CHAR ||
goetz@6458 2101 in_sig_bt[in+1] == T_BYTE || in_sig_bt[in+1] == T_SHORT ||
goetz@6458 2102 in_sig_bt[in+1] == T_INT,
goetz@6458 2103 "expecting type (T_LONG,bt) for bt in {T_BOOLEAN, T_CHAR, T_BYTE, T_SHORT, T_INT}");
goetz@6458 2104 int_move(masm, in_regs[in], out_regs[out], r_callers_sp, r_temp_1);
goetz@6458 2105 }
goetz@6458 2106 break;
goetz@6458 2107 case T_ARRAY:
goetz@6458 2108 if (is_critical_native) {
goetz@6458 2109 int body_arg = out;
goetz@6458 2110 out -= 2; // Point to length arg. PPC64: pass ints as longs.
goetz@6458 2111 unpack_array_argument(masm, in_regs[in], in_elem_bt[in], out_regs[body_arg], out_regs[out],
goetz@6458 2112 r_callers_sp, r_temp_1, r_temp_2);
goetz@6458 2113 break;
goetz@6458 2114 }
goetz@6458 2115 case T_OBJECT:
goetz@6458 2116 assert(!is_critical_native, "no oop arguments");
goetz@6458 2117 object_move(masm, stack_slots,
goetz@6458 2118 oop_map, oop_handle_slot_offset,
goetz@6458 2119 ((in == 0) && (!method_is_static)), &receiver_offset,
goetz@6458 2120 in_regs[in], out_regs[out],
goetz@6458 2121 r_callers_sp, r_temp_1, r_temp_2);
goetz@6458 2122 break;
goetz@6458 2123 case T_VOID:
goetz@6458 2124 break;
goetz@6458 2125 case T_FLOAT:
goetz@6458 2126 float_move(masm, in_regs[in], out_regs[out], r_callers_sp, r_temp_1);
goetz@6458 2127 if (out_regs2[out].first()->is_valid()) {
goetz@6458 2128 float_move(masm, in_regs[in], out_regs2[out], r_callers_sp, r_temp_1);
goetz@6458 2129 }
goetz@6458 2130 break;
goetz@6458 2131 case T_DOUBLE:
goetz@6458 2132 double_move(masm, in_regs[in], out_regs[out], r_callers_sp, r_temp_1);
goetz@6458 2133 if (out_regs2[out].first()->is_valid()) {
goetz@6458 2134 double_move(masm, in_regs[in], out_regs2[out], r_callers_sp, r_temp_1);
goetz@6458 2135 }
goetz@6458 2136 break;
goetz@6458 2137 case T_ADDRESS:
goetz@6458 2138 fatal("found type (T_ADDRESS) in java args");
goetz@6458 2139 break;
goetz@6458 2140 default:
goetz@6458 2141 ShouldNotReachHere();
goetz@6458 2142 break;
goetz@6458 2143 }
goetz@6458 2144 }
goetz@6458 2145
goetz@6458 2146 // Pre-load a static method's oop into ARG2.
goetz@6458 2147 // Used both by locking code and the normal JNI call code.
goetz@6458 2148 if (method_is_static && !is_critical_native) {
goetz@6458 2149 __ set_oop_constant(JNIHandles::make_local(method->method_holder()->java_mirror()),
goetz@6458 2150 r_carg2_classorobject);
goetz@6458 2151
goetz@6458 2152 // Now handlize the static class mirror in carg2. It's known not-null.
goetz@6458 2153 __ std(r_carg2_classorobject, klass_offset, R1_SP);
goetz@6458 2154 oop_map->set_oop(VMRegImpl::stack2reg(klass_slot_offset));
goetz@6458 2155 __ addi(r_carg2_classorobject, R1_SP, klass_offset);
goetz@6458 2156 }
goetz@6458 2157
goetz@6458 2158 // Get JNIEnv* which is first argument to native.
goetz@6458 2159 if (!is_critical_native) {
goetz@6458 2160 __ addi(r_carg1_jnienv, R16_thread, in_bytes(JavaThread::jni_environment_offset()));
goetz@6458 2161 }
goetz@6458 2162
goetz@6458 2163 // NOTE:
goetz@6458 2164 //
goetz@6458 2165 // We have all of the arguments setup at this point.
goetz@6458 2166 // We MUST NOT touch any outgoing regs from this point on.
goetz@6458 2167 // So if we must call out we must push a new frame.
goetz@6458 2168
goetz@6458 2169 // Get current pc for oopmap, and load it patchable relative to global toc.
goetz@6458 2170 oopmap_pc = (intptr_t) __ pc();
goetz@6458 2171 __ calculate_address_from_global_toc(r_return_pc, (address)oopmap_pc, true, true, true, true);
goetz@6458 2172
goetz@6458 2173 // We use the same pc/oopMap repeatedly when we call out.
goetz@6458 2174 oop_maps->add_gc_map(oopmap_pc - start_pc, oop_map);
goetz@6458 2175
goetz@6458 2176 // r_return_pc now has the pc loaded that we will use when we finally call
goetz@6458 2177 // to native.
goetz@6458 2178
goetz@6458 2179 // Make sure that thread is non-volatile; it crosses a bunch of VM calls below.
goetz@6458 2180 assert(R16_thread->is_nonvolatile(), "thread must be in non-volatile register");
goetz@6458 2181
goetz@6458 2182
goetz@6458 2183 # if 0
goetz@6458 2184 // DTrace method entry
goetz@6458 2185 # endif
goetz@6458 2186
goetz@6458 2187 // Lock a synchronized method.
goetz@6458 2188 // --------------------------------------------------------------------------
goetz@6458 2189
goetz@6458 2190 if (method->is_synchronized()) {
goetz@6458 2191 assert(!is_critical_native, "unhandled");
goetz@6458 2192 ConditionRegister r_flag = CCR1;
goetz@6458 2193 Register r_oop = r_temp_4;
goetz@6458 2194 const Register r_box = r_temp_5;
goetz@6458 2195 Label done, locked;
goetz@6458 2196
goetz@6458 2197 // Load the oop for the object or class. r_carg2_classorobject contains
goetz@6458 2198 // either the handlized oop from the incoming arguments or the handlized
goetz@6458 2199 // class mirror (if the method is static).
goetz@6458 2200 __ ld(r_oop, 0, r_carg2_classorobject);
goetz@6458 2201
goetz@6458 2202 // Get the lock box slot's address.
goetz@6458 2203 __ addi(r_box, R1_SP, lock_offset);
goetz@6458 2204
goetz@6458 2205 # ifdef ASSERT
goetz@6458 2206 if (UseBiasedLocking) {
goetz@6458 2207 // Making the box point to itself will make it clear it went unused
goetz@6458 2208 // but also be obviously invalid.
goetz@6458 2209 __ std(r_box, 0, r_box);
goetz@6458 2210 }
goetz@6458 2211 # endif // ASSERT
goetz@6458 2212
goetz@6458 2213 // Try fastpath for locking.
goetz@6458 2214 // fast_lock kills r_temp_1, r_temp_2, r_temp_3.
goetz@6458 2215 __ compiler_fast_lock_object(r_flag, r_oop, r_box, r_temp_1, r_temp_2, r_temp_3);
goetz@6458 2216 __ beq(r_flag, locked);
goetz@6458 2217
goetz@6458 2218 // None of the above fast optimizations worked so we have to get into the
goetz@6458 2219 // slow case of monitor enter. Inline a special case of call_VM that
goetz@6458 2220 // disallows any pending_exception.
goetz@6458 2221
goetz@6511 2222 // Save argument registers and leave room for C-compatible ABI_REG_ARGS.
goetz@6511 2223 int frame_size = frame::abi_reg_args_size +
goetz@6458 2224 round_to(total_c_args * wordSize, frame::alignment_in_bytes);
goetz@6458 2225 __ mr(R11_scratch1, R1_SP);
goetz@6458 2226 RegisterSaver::push_frame_and_save_argument_registers(masm, R12_scratch2, frame_size, total_c_args, out_regs, out_regs2);
goetz@6458 2227
goetz@6458 2228 // Do the call.
goetz@6458 2229 __ set_last_Java_frame(R11_scratch1, r_return_pc);
goetz@6458 2230 assert(r_return_pc->is_nonvolatile(), "expecting return pc to be in non-volatile register");
goetz@6458 2231 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::complete_monitor_locking_C), r_oop, r_box, R16_thread);
goetz@6458 2232 __ reset_last_Java_frame();
goetz@6458 2233
goetz@6458 2234 RegisterSaver::restore_argument_registers_and_pop_frame(masm, frame_size, total_c_args, out_regs, out_regs2);
goetz@6458 2235
goetz@6458 2236 __ asm_assert_mem8_is_zero(thread_(pending_exception),
goetz@6458 2237 "no pending exception allowed on exit from SharedRuntime::complete_monitor_locking_C", 0);
goetz@6458 2238
goetz@6458 2239 __ bind(locked);
goetz@6458 2240 }
goetz@6458 2241
goetz@6458 2242
goetz@6458 2243 // Publish thread state
goetz@6458 2244 // --------------------------------------------------------------------------
goetz@6458 2245
goetz@6458 2246 // Use that pc we placed in r_return_pc a while back as the current frame anchor.
goetz@6458 2247 __ set_last_Java_frame(R1_SP, r_return_pc);
goetz@6458 2248
goetz@6458 2249 // Transition from _thread_in_Java to _thread_in_native.
goetz@6458 2250 __ li(R0, _thread_in_native);
goetz@6458 2251 __ release();
goetz@6458 2252 // TODO: PPC port assert(4 == JavaThread::sz_thread_state(), "unexpected field size");
goetz@6458 2253 __ stw(R0, thread_(thread_state));
goetz@6458 2254 if (UseMembar) {
goetz@6458 2255 __ fence();
goetz@6458 2256 }
goetz@6458 2257
goetz@6458 2258
goetz@6458 2259 // The JNI call
goetz@6458 2260 // --------------------------------------------------------------------------
goetz@6511 2261 #if defined(ABI_ELFv2)
goetz@6511 2262 __ call_c(native_func, relocInfo::runtime_call_type);
goetz@6511 2263 #else
goetz@6458 2264 FunctionDescriptor* fd_native_method = (FunctionDescriptor*) native_func;
goetz@6458 2265 __ call_c(fd_native_method, relocInfo::runtime_call_type);
goetz@6511 2266 #endif
goetz@6458 2267
goetz@6458 2268
goetz@6458 2269 // Now, we are back from the native code.
goetz@6458 2270
goetz@6458 2271
goetz@6458 2272 // Unpack the native result.
goetz@6458 2273 // --------------------------------------------------------------------------
goetz@6458 2274
goetz@6458 2275 // For int-types, we do any needed sign-extension required.
goetz@6458 2276 // Care must be taken that the return values (R3_RET and F1_RET)
goetz@6458 2277 // will survive any VM calls for blocking or unlocking.
goetz@6458 2278 // An OOP result (handle) is done specially in the slow-path code.
goetz@6458 2279
goetz@6458 2280 switch (ret_type) {
goetz@6458 2281 case T_VOID: break; // Nothing to do!
goetz@6458 2282 case T_FLOAT: break; // Got it where we want it (unless slow-path).
goetz@6458 2283 case T_DOUBLE: break; // Got it where we want it (unless slow-path).
goetz@6458 2284 case T_LONG: break; // Got it where we want it (unless slow-path).
goetz@6458 2285 case T_OBJECT: break; // Really a handle.
goetz@6458 2286 // Cannot de-handlize until after reclaiming jvm_lock.
goetz@6458 2287 case T_ARRAY: break;
goetz@6458 2288
goetz@6458 2289 case T_BOOLEAN: { // 0 -> false(0); !0 -> true(1)
goetz@6458 2290 Label skip_modify;
goetz@6458 2291 __ cmpwi(CCR0, R3_RET, 0);
goetz@6458 2292 __ beq(CCR0, skip_modify);
goetz@6458 2293 __ li(R3_RET, 1);
goetz@6458 2294 __ bind(skip_modify);
goetz@6458 2295 break;
goetz@6458 2296 }
goetz@6458 2297 case T_BYTE: { // sign extension
goetz@6458 2298 __ extsb(R3_RET, R3_RET);
goetz@6458 2299 break;
goetz@6458 2300 }
goetz@6458 2301 case T_CHAR: { // unsigned result
goetz@6458 2302 __ andi(R3_RET, R3_RET, 0xffff);
goetz@6458 2303 break;
goetz@6458 2304 }
goetz@6458 2305 case T_SHORT: { // sign extension
goetz@6458 2306 __ extsh(R3_RET, R3_RET);
goetz@6458 2307 break;
goetz@6458 2308 }
goetz@6458 2309 case T_INT: // nothing to do
goetz@6458 2310 break;
goetz@6458 2311 default:
goetz@6458 2312 ShouldNotReachHere();
goetz@6458 2313 break;
goetz@6458 2314 }
goetz@6458 2315
goetz@6458 2316
goetz@6458 2317 // Publish thread state
goetz@6458 2318 // --------------------------------------------------------------------------
goetz@6458 2319
goetz@6458 2320 // Switch thread to "native transition" state before reading the
goetz@6458 2321 // synchronization state. This additional state is necessary because reading
goetz@6458 2322 // and testing the synchronization state is not atomic w.r.t. GC, as this
goetz@6458 2323 // scenario demonstrates:
goetz@6458 2324 // - Java thread A, in _thread_in_native state, loads _not_synchronized
goetz@6458 2325 // and is preempted.
goetz@6458 2326 // - VM thread changes sync state to synchronizing and suspends threads
goetz@6458 2327 // for GC.
goetz@6458 2328 // - Thread A is resumed to finish this native method, but doesn't block
goetz@6458 2329 // here since it didn't see any synchronization in progress, and escapes.
goetz@6458 2330
goetz@6458 2331 // Transition from _thread_in_native to _thread_in_native_trans.
goetz@6458 2332 __ li(R0, _thread_in_native_trans);
goetz@6458 2333 __ release();
goetz@6458 2334 // TODO: PPC port assert(4 == JavaThread::sz_thread_state(), "unexpected field size");
goetz@6458 2335 __ stw(R0, thread_(thread_state));
goetz@6458 2336
goetz@6458 2337
goetz@6458 2338 // Must we block?
goetz@6458 2339 // --------------------------------------------------------------------------
goetz@6458 2340
goetz@6458 2341 // Block, if necessary, before resuming in _thread_in_Java state.
goetz@6458 2342 // In order for GC to work, don't clear the last_Java_sp until after blocking.
goetz@6458 2343 Label after_transition;
goetz@6458 2344 {
goetz@6458 2345 Label no_block, sync;
goetz@6458 2346
goetz@6458 2347 if (os::is_MP()) {
goetz@6458 2348 if (UseMembar) {
goetz@6458 2349 // Force this write out before the read below.
goetz@6458 2350 __ fence();
goetz@6458 2351 } else {
goetz@6458 2352 // Write serialization page so VM thread can do a pseudo remote membar.
goetz@6458 2353 // We use the current thread pointer to calculate a thread specific
goetz@6458 2354 // offset to write to within the page. This minimizes bus traffic
goetz@6458 2355 // due to cache line collision.
goetz@6458 2356 __ serialize_memory(R16_thread, r_temp_4, r_temp_5);
goetz@6458 2357 }
goetz@6458 2358 }
goetz@6458 2359
goetz@6458 2360 Register sync_state_addr = r_temp_4;
goetz@6458 2361 Register sync_state = r_temp_5;
goetz@6458 2362 Register suspend_flags = r_temp_6;
goetz@6458 2363
goetz@6458 2364 __ load_const(sync_state_addr, SafepointSynchronize::address_of_state(), /*temp*/ sync_state);
goetz@6458 2365
goetz@6458 2366 // TODO: PPC port assert(4 == SafepointSynchronize::sz_state(), "unexpected field size");
goetz@6458 2367 __ lwz(sync_state, 0, sync_state_addr);
goetz@6458 2368
goetz@6458 2369 // TODO: PPC port assert(4 == Thread::sz_suspend_flags(), "unexpected field size");
goetz@6458 2370 __ lwz(suspend_flags, thread_(suspend_flags));
goetz@6458 2371
goetz@6458 2372 __ acquire();
goetz@6458 2373
goetz@6458 2374 Label do_safepoint;
goetz@6458 2375 // No synchronization in progress nor yet synchronized.
goetz@6458 2376 __ cmpwi(CCR0, sync_state, SafepointSynchronize::_not_synchronized);
goetz@6458 2377 // Not suspended.
goetz@6458 2378 __ cmpwi(CCR1, suspend_flags, 0);
goetz@6458 2379
goetz@6458 2380 __ bne(CCR0, sync);
goetz@6458 2381 __ beq(CCR1, no_block);
goetz@6458 2382
goetz@6458 2383 // Block. Save any potential method result value before the operation and
goetz@6458 2384 // use a leaf call to leave the last_Java_frame setup undisturbed. Doing this
goetz@6458 2385 // lets us share the oopMap we used when we went native rather than create
goetz@6458 2386 // a distinct one for this pc.
goetz@6458 2387 __ bind(sync);
goetz@6458 2388
goetz@6458 2389 address entry_point = is_critical_native
goetz@6458 2390 ? CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans_and_transition)
goetz@6458 2391 : CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans);
goetz@6458 2392 save_native_result(masm, ret_type, workspace_slot_offset);
goetz@6458 2393 __ call_VM_leaf(entry_point, R16_thread);
goetz@6458 2394 restore_native_result(masm, ret_type, workspace_slot_offset);
goetz@6458 2395
goetz@6458 2396 if (is_critical_native) {
goetz@6458 2397 __ b(after_transition); // No thread state transition here.
goetz@6458 2398 }
goetz@6458 2399 __ bind(no_block);
goetz@6458 2400 }
goetz@6458 2401
goetz@6458 2402 // Publish thread state.
goetz@6458 2403 // --------------------------------------------------------------------------
goetz@6458 2404
goetz@6458 2405 // Thread state is thread_in_native_trans. Any safepoint blocking has
goetz@6458 2406 // already happened so we can now change state to _thread_in_Java.
goetz@6458 2407
goetz@6458 2408 // Transition from _thread_in_native_trans to _thread_in_Java.
goetz@6458 2409 __ li(R0, _thread_in_Java);
goetz@6458 2410 __ release();
goetz@6458 2411 // TODO: PPC port assert(4 == JavaThread::sz_thread_state(), "unexpected field size");
goetz@6458 2412 __ stw(R0, thread_(thread_state));
goetz@6458 2413 if (UseMembar) {
goetz@6458 2414 __ fence();
goetz@6458 2415 }
goetz@6458 2416 __ bind(after_transition);
goetz@6458 2417
goetz@6458 2418 // Reguard any pages if necessary.
goetz@6458 2419 // --------------------------------------------------------------------------
goetz@6458 2420
goetz@6458 2421 Label no_reguard;
goetz@6458 2422 __ lwz(r_temp_1, thread_(stack_guard_state));
goetz@6458 2423 __ cmpwi(CCR0, r_temp_1, JavaThread::stack_guard_yellow_disabled);
goetz@6458 2424 __ bne(CCR0, no_reguard);
goetz@6458 2425
goetz@6458 2426 save_native_result(masm, ret_type, workspace_slot_offset);
goetz@6458 2427 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages));
goetz@6458 2428 restore_native_result(masm, ret_type, workspace_slot_offset);
goetz@6458 2429
goetz@6458 2430 __ bind(no_reguard);
goetz@6458 2431
goetz@6458 2432
goetz@6458 2433 // Unlock
goetz@6458 2434 // --------------------------------------------------------------------------
goetz@6458 2435
goetz@6458 2436 if (method->is_synchronized()) {
goetz@6458 2437
goetz@6458 2438 ConditionRegister r_flag = CCR1;
goetz@6458 2439 const Register r_oop = r_temp_4;
goetz@6458 2440 const Register r_box = r_temp_5;
goetz@6458 2441 const Register r_exception = r_temp_6;
goetz@6458 2442 Label done;
goetz@6458 2443
goetz@6458 2444 // Get oop and address of lock object box.
goetz@6458 2445 if (method_is_static) {
goetz@6458 2446 assert(klass_offset != -1, "");
goetz@6458 2447 __ ld(r_oop, klass_offset, R1_SP);
goetz@6458 2448 } else {
goetz@6458 2449 assert(receiver_offset != -1, "");
goetz@6458 2450 __ ld(r_oop, receiver_offset, R1_SP);
goetz@6458 2451 }
goetz@6458 2452 __ addi(r_box, R1_SP, lock_offset);
goetz@6458 2453
goetz@6458 2454 // Try fastpath for unlocking.
goetz@6458 2455 __ compiler_fast_unlock_object(r_flag, r_oop, r_box, r_temp_1, r_temp_2, r_temp_3);
goetz@6458 2456 __ beq(r_flag, done);
goetz@6458 2457
goetz@6458 2458 // Save and restore any potential method result value around the unlocking operation.
goetz@6458 2459 save_native_result(masm, ret_type, workspace_slot_offset);
goetz@6458 2460
goetz@6458 2461 // Must save pending exception around the slow-path VM call. Since it's a
goetz@6458 2462 // leaf call, the pending exception (if any) can be kept in a register.
goetz@6458 2463 __ ld(r_exception, thread_(pending_exception));
goetz@6458 2464 assert(r_exception->is_nonvolatile(), "exception register must be non-volatile");
goetz@6458 2465 __ li(R0, 0);
goetz@6458 2466 __ std(R0, thread_(pending_exception));
goetz@6458 2467
goetz@6458 2468 // Slow case of monitor enter.
goetz@6458 2469 // Inline a special case of call_VM that disallows any pending_exception.
goetz@6458 2470 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::complete_monitor_unlocking_C), r_oop, r_box);
goetz@6458 2471
goetz@6458 2472 __ asm_assert_mem8_is_zero(thread_(pending_exception),
goetz@6458 2473 "no pending exception allowed on exit from SharedRuntime::complete_monitor_unlocking_C", 0);
goetz@6458 2474
goetz@6458 2475 restore_native_result(masm, ret_type, workspace_slot_offset);
goetz@6458 2476
goetz@6458 2477 // Check_forward_pending_exception jump to forward_exception if any pending
goetz@6458 2478 // exception is set. The forward_exception routine expects to see the
goetz@6458 2479 // exception in pending_exception and not in a register. Kind of clumsy,
goetz@6458 2480 // since all folks who branch to forward_exception must have tested
goetz@6458 2481 // pending_exception first and hence have it in a register already.
goetz@6458 2482 __ std(r_exception, thread_(pending_exception));
goetz@6458 2483
goetz@6458 2484 __ bind(done);
goetz@6458 2485 }
goetz@6458 2486
goetz@6458 2487 # if 0
goetz@6458 2488 // DTrace method exit
goetz@6458 2489 # endif
goetz@6458 2490
goetz@6458 2491 // Clear "last Java frame" SP and PC.
goetz@6458 2492 // --------------------------------------------------------------------------
goetz@6458 2493
goetz@6458 2494 __ reset_last_Java_frame();
goetz@6458 2495
goetz@6458 2496 // Unpack oop result.
goetz@6458 2497 // --------------------------------------------------------------------------
goetz@6458 2498
goetz@6458 2499 if (ret_type == T_OBJECT || ret_type == T_ARRAY) {
goetz@6458 2500 Label skip_unboxing;
goetz@6458 2501 __ cmpdi(CCR0, R3_RET, 0);
goetz@6458 2502 __ beq(CCR0, skip_unboxing);
goetz@6458 2503 __ ld(R3_RET, 0, R3_RET);
goetz@6458 2504 __ bind(skip_unboxing);
goetz@6458 2505 __ verify_oop(R3_RET);
goetz@6458 2506 }
goetz@6458 2507
goetz@6458 2508
goetz@6458 2509 // Reset handle block.
goetz@6458 2510 // --------------------------------------------------------------------------
goetz@6458 2511 if (!is_critical_native) {
goetz@6458 2512 __ ld(r_temp_1, thread_(active_handles));
goetz@6458 2513 // TODO: PPC port assert(4 == JNIHandleBlock::top_size_in_bytes(), "unexpected field size");
goetz@6458 2514 __ li(r_temp_2, 0);
goetz@6458 2515 __ stw(r_temp_2, JNIHandleBlock::top_offset_in_bytes(), r_temp_1);
goetz@6458 2516
goetz@6458 2517
goetz@6458 2518 // Check for pending exceptions.
goetz@6458 2519 // --------------------------------------------------------------------------
goetz@6458 2520 __ ld(r_temp_2, thread_(pending_exception));
goetz@6458 2521 __ cmpdi(CCR0, r_temp_2, 0);
goetz@6458 2522 __ bne(CCR0, handle_pending_exception);
goetz@6458 2523 }
goetz@6458 2524
goetz@6458 2525 // Return
goetz@6458 2526 // --------------------------------------------------------------------------
goetz@6458 2527
goetz@6458 2528 __ pop_frame();
goetz@6458 2529 __ restore_LR_CR(R11);
goetz@6458 2530 __ blr();
goetz@6458 2531
goetz@6458 2532
goetz@6458 2533 // Handler for pending exceptions (out-of-line).
goetz@6458 2534 // --------------------------------------------------------------------------
goetz@6458 2535
goetz@6458 2536 // Since this is a native call, we know the proper exception handler
goetz@6458 2537 // is the empty function. We just pop this frame and then jump to
goetz@6458 2538 // forward_exception_entry.
goetz@6458 2539 if (!is_critical_native) {
goetz@6458 2540 __ align(InteriorEntryAlignment);
goetz@6458 2541 __ bind(handle_pending_exception);
goetz@6458 2542
goetz@6458 2543 __ pop_frame();
goetz@6458 2544 __ restore_LR_CR(R11);
goetz@6458 2545 __ b64_patchable((address)StubRoutines::forward_exception_entry(),
goetz@6458 2546 relocInfo::runtime_call_type);
goetz@6458 2547 }
goetz@6458 2548
goetz@6458 2549 // Handler for a cache miss (out-of-line).
goetz@6458 2550 // --------------------------------------------------------------------------
goetz@6458 2551
goetz@6458 2552 if (!method_is_static) {
goetz@6458 2553 __ align(InteriorEntryAlignment);
goetz@6458 2554 __ bind(ic_miss);
goetz@6458 2555
goetz@6458 2556 __ b64_patchable((address)SharedRuntime::get_ic_miss_stub(),
goetz@6458 2557 relocInfo::runtime_call_type);
goetz@6458 2558 }
goetz@6458 2559
goetz@6458 2560 // Done.
goetz@6458 2561 // --------------------------------------------------------------------------
goetz@6458 2562
goetz@6458 2563 __ flush();
goetz@6458 2564
goetz@6458 2565 nmethod *nm = nmethod::new_native_nmethod(method,
goetz@6458 2566 compile_id,
goetz@6458 2567 masm->code(),
goetz@6458 2568 vep_start_pc-start_pc,
goetz@6458 2569 frame_done_pc-start_pc,
goetz@6458 2570 stack_slots / VMRegImpl::slots_per_word,
goetz@6458 2571 (method_is_static ? in_ByteSize(klass_offset) : in_ByteSize(receiver_offset)),
goetz@6458 2572 in_ByteSize(lock_offset),
goetz@6458 2573 oop_maps);
goetz@6458 2574
goetz@6458 2575 if (is_critical_native) {
goetz@6458 2576 nm->set_lazy_critical_native(true);
goetz@6458 2577 }
goetz@6458 2578
goetz@6458 2579 return nm;
goetz@6458 2580 #else
goetz@6458 2581 ShouldNotReachHere();
goetz@6458 2582 return NULL;
goetz@6458 2583 #endif // COMPILER2
goetz@6458 2584 }
goetz@6458 2585
goetz@6458 2586 // This function returns the adjust size (in number of words) to a c2i adapter
goetz@6458 2587 // activation for use during deoptimization.
goetz@6458 2588 int Deoptimization::last_frame_adjust(int callee_parameters, int callee_locals) {
goetz@6458 2589 return round_to((callee_locals - callee_parameters) * Interpreter::stackElementWords, frame::alignment_in_bytes);
goetz@6458 2590 }
goetz@6458 2591
goetz@6458 2592 uint SharedRuntime::out_preserve_stack_slots() {
goetz@6458 2593 #ifdef COMPILER2
goetz@6458 2594 return frame::jit_out_preserve_size / VMRegImpl::stack_slot_size;
goetz@6458 2595 #else
goetz@6458 2596 return 0;
goetz@6458 2597 #endif
goetz@6458 2598 }
goetz@6458 2599
goetz@6458 2600 #ifdef COMPILER2
goetz@6458 2601 // Frame generation for deopt and uncommon trap blobs.
goetz@6458 2602 static void push_skeleton_frame(MacroAssembler* masm, bool deopt,
goetz@6458 2603 /* Read */
goetz@6458 2604 Register unroll_block_reg,
goetz@6458 2605 /* Update */
goetz@6458 2606 Register frame_sizes_reg,
goetz@6458 2607 Register number_of_frames_reg,
goetz@6458 2608 Register pcs_reg,
goetz@6458 2609 /* Invalidate */
goetz@6458 2610 Register frame_size_reg,
goetz@6458 2611 Register pc_reg) {
goetz@6458 2612
goetz@6458 2613 __ ld(pc_reg, 0, pcs_reg);
goetz@6458 2614 __ ld(frame_size_reg, 0, frame_sizes_reg);
goetz@6458 2615 __ std(pc_reg, _abi(lr), R1_SP);
goetz@6458 2616 __ push_frame(frame_size_reg, R0/*tmp*/);
goetz@6495 2617 #ifdef CC_INTERP
goetz@6458 2618 __ std(R1_SP, _parent_ijava_frame_abi(initial_caller_sp), R1_SP);
goetz@6495 2619 #else
goetz@6495 2620 Unimplemented();
goetz@6495 2621 #endif
goetz@6458 2622 __ addi(number_of_frames_reg, number_of_frames_reg, -1);
goetz@6458 2623 __ addi(frame_sizes_reg, frame_sizes_reg, wordSize);
goetz@6458 2624 __ addi(pcs_reg, pcs_reg, wordSize);
goetz@6458 2625 }
goetz@6458 2626
goetz@6458 2627 // Loop through the UnrollBlock info and create new frames.
goetz@6458 2628 static void push_skeleton_frames(MacroAssembler* masm, bool deopt,
goetz@6458 2629 /* read */
goetz@6458 2630 Register unroll_block_reg,
goetz@6458 2631 /* invalidate */
goetz@6458 2632 Register frame_sizes_reg,
goetz@6458 2633 Register number_of_frames_reg,
goetz@6458 2634 Register pcs_reg,
goetz@6458 2635 Register frame_size_reg,
goetz@6458 2636 Register pc_reg) {
goetz@6458 2637 Label loop;
goetz@6458 2638
goetz@6458 2639 // _number_of_frames is of type int (deoptimization.hpp)
goetz@6458 2640 __ lwa(number_of_frames_reg,
goetz@6458 2641 Deoptimization::UnrollBlock::number_of_frames_offset_in_bytes(),
goetz@6458 2642 unroll_block_reg);
goetz@6458 2643 __ ld(pcs_reg,
goetz@6458 2644 Deoptimization::UnrollBlock::frame_pcs_offset_in_bytes(),
goetz@6458 2645 unroll_block_reg);
goetz@6458 2646 __ ld(frame_sizes_reg,
goetz@6458 2647 Deoptimization::UnrollBlock::frame_sizes_offset_in_bytes(),
goetz@6458 2648 unroll_block_reg);
goetz@6458 2649
goetz@6458 2650 // stack: (caller_of_deoptee, ...).
goetz@6458 2651
goetz@6458 2652 // At this point we either have an interpreter frame or a compiled
goetz@6458 2653 // frame on top of stack. If it is a compiled frame we push a new c2i
goetz@6458 2654 // adapter here
goetz@6458 2655
goetz@6458 2656 // Memorize top-frame stack-pointer.
goetz@6458 2657 __ mr(frame_size_reg/*old_sp*/, R1_SP);
goetz@6458 2658
goetz@6458 2659 // Resize interpreter top frame OR C2I adapter.
goetz@6458 2660
goetz@6458 2661 // At this moment, the top frame (which is the caller of the deoptee) is
goetz@6458 2662 // an interpreter frame or a newly pushed C2I adapter or an entry frame.
goetz@6458 2663 // The top frame has a TOP_IJAVA_FRAME_ABI and the frame contains the
goetz@6458 2664 // outgoing arguments.
goetz@6458 2665 //
goetz@6458 2666 // In order to push the interpreter frame for the deoptee, we need to
goetz@6458 2667 // resize the top frame such that we are able to place the deoptee's
goetz@6458 2668 // locals in the frame.
goetz@6458 2669 // Additionally, we have to turn the top frame's TOP_IJAVA_FRAME_ABI
goetz@6458 2670 // into a valid PARENT_IJAVA_FRAME_ABI.
goetz@6458 2671
goetz@6458 2672 __ lwa(R11_scratch1,
goetz@6458 2673 Deoptimization::UnrollBlock::caller_adjustment_offset_in_bytes(),
goetz@6458 2674 unroll_block_reg);
goetz@6458 2675 __ neg(R11_scratch1, R11_scratch1);
goetz@6458 2676
goetz@6458 2677 // R11_scratch1 contains size of locals for frame resizing.
goetz@6458 2678 // R12_scratch2 contains top frame's lr.
goetz@6458 2679
goetz@6458 2680 // Resize frame by complete frame size prevents TOC from being
goetz@6458 2681 // overwritten by locals. A more stack space saving way would be
goetz@6458 2682 // to copy the TOC to its location in the new abi.
goetz@6458 2683 __ addi(R11_scratch1, R11_scratch1, - frame::parent_ijava_frame_abi_size);
goetz@6458 2684
goetz@6458 2685 // now, resize the frame
goetz@6458 2686 __ resize_frame(R11_scratch1, pc_reg/*tmp*/);
goetz@6458 2687
goetz@6458 2688 // In the case where we have resized a c2i frame above, the optional
goetz@6458 2689 // alignment below the locals has size 32 (why?).
goetz@6458 2690 __ std(R12_scratch2, _abi(lr), R1_SP);
goetz@6458 2691
goetz@6458 2692 // Initialize initial_caller_sp.
goetz@6458 2693 __ std(frame_size_reg/*old_sp*/, _parent_ijava_frame_abi(initial_caller_sp), R1_SP);
goetz@6458 2694
goetz@6458 2695 #ifdef ASSERT
goetz@6458 2696 // Make sure that there is at least one entry in the array.
goetz@6458 2697 __ cmpdi(CCR0, number_of_frames_reg, 0);
goetz@6458 2698 __ asm_assert_ne("array_size must be > 0", 0x205);
goetz@6458 2699 #endif
goetz@6458 2700
goetz@6458 2701 // Now push the new interpreter frames.
goetz@6458 2702 //
goetz@6458 2703 __ bind(loop);
goetz@6458 2704 // Allocate a new frame, fill in the pc.
goetz@6458 2705 push_skeleton_frame(masm, deopt,
goetz@6458 2706 unroll_block_reg,
goetz@6458 2707 frame_sizes_reg,
goetz@6458 2708 number_of_frames_reg,
goetz@6458 2709 pcs_reg,
goetz@6458 2710 frame_size_reg,
goetz@6458 2711 pc_reg);
goetz@6458 2712 __ cmpdi(CCR0, number_of_frames_reg, 0);
goetz@6458 2713 __ bne(CCR0, loop);
goetz@6458 2714
goetz@6458 2715 // Get the return address pointing into the frame manager.
goetz@6458 2716 __ ld(R0, 0, pcs_reg);
goetz@6458 2717 // Store it in the top interpreter frame.
goetz@6458 2718 __ std(R0, _abi(lr), R1_SP);
goetz@6458 2719 // Initialize frame_manager_lr of interpreter top frame.
goetz@6495 2720 #ifdef CC_INTERP
goetz@6458 2721 __ std(R0, _top_ijava_frame_abi(frame_manager_lr), R1_SP);
goetz@6495 2722 #endif
goetz@6458 2723 }
goetz@6458 2724 #endif
goetz@6458 2725
goetz@6458 2726 void SharedRuntime::generate_deopt_blob() {
goetz@6458 2727 // Allocate space for the code
goetz@6458 2728 ResourceMark rm;
goetz@6458 2729 // Setup code generation tools
goetz@6458 2730 CodeBuffer buffer("deopt_blob", 2048, 1024);
goetz@6458 2731 InterpreterMacroAssembler* masm = new InterpreterMacroAssembler(&buffer);
goetz@6458 2732 Label exec_mode_initialized;
goetz@6458 2733 int frame_size_in_words;
goetz@6458 2734 OopMap* map = NULL;
goetz@6458 2735 OopMapSet *oop_maps = new OopMapSet();
goetz@6458 2736
goetz@6458 2737 // size of ABI112 plus spill slots for R3_RET and F1_RET.
goetz@6511 2738 const int frame_size_in_bytes = frame::abi_reg_args_spill_size;
goetz@6458 2739 const int frame_size_in_slots = frame_size_in_bytes / sizeof(jint);
goetz@6458 2740 int first_frame_size_in_bytes = 0; // frame size of "unpack frame" for call to fetch_unroll_info.
goetz@6458 2741
goetz@6458 2742 const Register exec_mode_reg = R21_tmp1;
goetz@6458 2743
goetz@6458 2744 const address start = __ pc();
goetz@6458 2745
goetz@6458 2746 #ifdef COMPILER2
goetz@6458 2747 // --------------------------------------------------------------------------
goetz@6458 2748 // Prolog for non exception case!
goetz@6458 2749
goetz@6458 2750 // We have been called from the deopt handler of the deoptee.
goetz@6458 2751 //
goetz@6458 2752 // deoptee:
goetz@6458 2753 // ...
goetz@6458 2754 // call X
goetz@6458 2755 // ...
goetz@6458 2756 // deopt_handler: call_deopt_stub
goetz@6458 2757 // cur. return pc --> ...
goetz@6458 2758 //
goetz@6458 2759 // So currently SR_LR points behind the call in the deopt handler.
goetz@6458 2760 // We adjust it such that it points to the start of the deopt handler.
goetz@6458 2761 // The return_pc has been stored in the frame of the deoptee and
goetz@6458 2762 // will replace the address of the deopt_handler in the call
goetz@6458 2763 // to Deoptimization::fetch_unroll_info below.
goetz@6458 2764 // We can't grab a free register here, because all registers may
goetz@6458 2765 // contain live values, so let the RegisterSaver do the adjustment
goetz@6458 2766 // of the return pc.
goetz@6458 2767 const int return_pc_adjustment_no_exception = -size_deopt_handler();
goetz@6458 2768
goetz@6458 2769 // Push the "unpack frame"
goetz@6458 2770 // Save everything in sight.
goetz@6511 2771 map = RegisterSaver::push_frame_reg_args_and_save_live_registers(masm,
goetz@6511 2772 &first_frame_size_in_bytes,
goetz@6511 2773 /*generate_oop_map=*/ true,
goetz@6511 2774 return_pc_adjustment_no_exception,
goetz@6511 2775 RegisterSaver::return_pc_is_lr);
goetz@6458 2776 assert(map != NULL, "OopMap must have been created");
goetz@6458 2777
goetz@6458 2778 __ li(exec_mode_reg, Deoptimization::Unpack_deopt);
goetz@6458 2779 // Save exec mode for unpack_frames.
goetz@6458 2780 __ b(exec_mode_initialized);
goetz@6458 2781
goetz@6458 2782 // --------------------------------------------------------------------------
goetz@6458 2783 // Prolog for exception case
goetz@6458 2784
goetz@6458 2785 // An exception is pending.
goetz@6458 2786 // We have been called with a return (interpreter) or a jump (exception blob).
goetz@6458 2787 //
goetz@6458 2788 // - R3_ARG1: exception oop
goetz@6458 2789 // - R4_ARG2: exception pc
goetz@6458 2790
goetz@6458 2791 int exception_offset = __ pc() - start;
goetz@6458 2792
goetz@6458 2793 BLOCK_COMMENT("Prolog for exception case");
goetz@6458 2794
goetz@6458 2795 // The RegisterSaves doesn't need to adjust the return pc for this situation.
goetz@6458 2796 const int return_pc_adjustment_exception = 0;
goetz@6458 2797
goetz@6458 2798 // Push the "unpack frame".
goetz@6458 2799 // Save everything in sight.
goetz@6458 2800 assert(R4 == R4_ARG2, "exception pc must be in r4");
goetz@6511 2801 RegisterSaver::push_frame_reg_args_and_save_live_registers(masm,
goetz@6511 2802 &first_frame_size_in_bytes,
goetz@6511 2803 /*generate_oop_map=*/ false,
goetz@6511 2804 return_pc_adjustment_exception,
goetz@6511 2805 RegisterSaver::return_pc_is_r4);
goetz@6458 2806
goetz@6458 2807 // Deopt during an exception. Save exec mode for unpack_frames.
goetz@6458 2808 __ li(exec_mode_reg, Deoptimization::Unpack_exception);
goetz@6458 2809
goetz@6458 2810 // Store exception oop and pc in thread (location known to GC).
goetz@6458 2811 // This is needed since the call to "fetch_unroll_info()" may safepoint.
goetz@6458 2812 __ std(R3_ARG1, in_bytes(JavaThread::exception_oop_offset()), R16_thread);
goetz@6458 2813 __ std(R4_ARG2, in_bytes(JavaThread::exception_pc_offset()), R16_thread);
goetz@6458 2814
goetz@6458 2815 // fall through
goetz@6458 2816
goetz@6458 2817 // --------------------------------------------------------------------------
goetz@6458 2818 __ BIND(exec_mode_initialized);
goetz@6458 2819
goetz@6458 2820 {
goetz@6458 2821 const Register unroll_block_reg = R22_tmp2;
goetz@6458 2822
goetz@6458 2823 // We need to set `last_Java_frame' because `fetch_unroll_info' will
goetz@6458 2824 // call `last_Java_frame()'. The value of the pc in the frame is not
goetz@6458 2825 // particularly important. It just needs to identify this blob.
goetz@6458 2826 __ set_last_Java_frame(R1_SP, noreg);
goetz@6458 2827
goetz@6458 2828 // With EscapeAnalysis turned on, this call may safepoint!
goetz@6458 2829 __ call_VM_leaf(CAST_FROM_FN_PTR(address, Deoptimization::fetch_unroll_info), R16_thread);
goetz@6458 2830 address calls_return_pc = __ last_calls_return_pc();
goetz@6458 2831 // Set an oopmap for the call site that describes all our saved registers.
goetz@6458 2832 oop_maps->add_gc_map(calls_return_pc - start, map);
goetz@6458 2833
goetz@6458 2834 __ reset_last_Java_frame();
goetz@6458 2835 // Save the return value.
goetz@6458 2836 __ mr(unroll_block_reg, R3_RET);
goetz@6458 2837
goetz@6458 2838 // Restore only the result registers that have been saved
goetz@6458 2839 // by save_volatile_registers(...).
goetz@6458 2840 RegisterSaver::restore_result_registers(masm, first_frame_size_in_bytes);
goetz@6458 2841
goetz@6458 2842 // In excp_deopt_mode, restore and clear exception oop which we
goetz@6458 2843 // stored in the thread during exception entry above. The exception
goetz@6458 2844 // oop will be the return value of this stub.
goetz@6458 2845 Label skip_restore_excp;
goetz@6458 2846 __ cmpdi(CCR0, exec_mode_reg, Deoptimization::Unpack_exception);
goetz@6458 2847 __ bne(CCR0, skip_restore_excp);
goetz@6458 2848 __ ld(R3_RET, in_bytes(JavaThread::exception_oop_offset()), R16_thread);
goetz@6458 2849 __ ld(R4_ARG2, in_bytes(JavaThread::exception_pc_offset()), R16_thread);
goetz@6458 2850 __ li(R0, 0);
goetz@6458 2851 __ std(R0, in_bytes(JavaThread::exception_pc_offset()), R16_thread);
goetz@6458 2852 __ std(R0, in_bytes(JavaThread::exception_oop_offset()), R16_thread);
goetz@6458 2853 __ BIND(skip_restore_excp);
goetz@6458 2854
goetz@6458 2855 // reload narrro_oop_base
goetz@6458 2856 if (UseCompressedOops && Universe::narrow_oop_base() != 0) {
goetz@6458 2857 __ load_const_optimized(R30, Universe::narrow_oop_base());
goetz@6458 2858 }
goetz@6458 2859
goetz@6458 2860 __ pop_frame();
goetz@6458 2861
goetz@6458 2862 // stack: (deoptee, optional i2c, caller of deoptee, ...).
goetz@6458 2863
goetz@6458 2864 // pop the deoptee's frame
goetz@6458 2865 __ pop_frame();
goetz@6458 2866
goetz@6458 2867 // stack: (caller_of_deoptee, ...).
goetz@6458 2868
goetz@6458 2869 // Loop through the `UnrollBlock' info and create interpreter frames.
goetz@6458 2870 push_skeleton_frames(masm, true/*deopt*/,
goetz@6458 2871 unroll_block_reg,
goetz@6458 2872 R23_tmp3,
goetz@6458 2873 R24_tmp4,
goetz@6458 2874 R25_tmp5,
goetz@6458 2875 R26_tmp6,
goetz@6458 2876 R27_tmp7);
goetz@6458 2877
goetz@6458 2878 // stack: (skeletal interpreter frame, ..., optional skeletal
goetz@6458 2879 // interpreter frame, optional c2i, caller of deoptee, ...).
goetz@6458 2880 }
goetz@6458 2881
goetz@6458 2882 // push an `unpack_frame' taking care of float / int return values.
goetz@6458 2883 __ push_frame(frame_size_in_bytes, R0/*tmp*/);
goetz@6458 2884
goetz@6458 2885 // stack: (unpack frame, skeletal interpreter frame, ..., optional
goetz@6458 2886 // skeletal interpreter frame, optional c2i, caller of deoptee,
goetz@6458 2887 // ...).
goetz@6458 2888
goetz@6458 2889 // Spill live volatile registers since we'll do a call.
goetz@6511 2890 __ std( R3_RET, _abi_reg_args_spill(spill_ret), R1_SP);
goetz@6511 2891 __ stfd(F1_RET, _abi_reg_args_spill(spill_fret), R1_SP);
goetz@6458 2892
goetz@6458 2893 // Let the unpacker layout information in the skeletal frames just
goetz@6458 2894 // allocated.
goetz@6458 2895 __ get_PC_trash_LR(R3_RET);
goetz@6458 2896 __ set_last_Java_frame(/*sp*/R1_SP, /*pc*/R3_RET);
goetz@6458 2897 // This is a call to a LEAF method, so no oop map is required.
goetz@6458 2898 __ call_VM_leaf(CAST_FROM_FN_PTR(address, Deoptimization::unpack_frames),
goetz@6458 2899 R16_thread/*thread*/, exec_mode_reg/*exec_mode*/);
goetz@6458 2900 __ reset_last_Java_frame();
goetz@6458 2901
goetz@6458 2902 // Restore the volatiles saved above.
goetz@6511 2903 __ ld( R3_RET, _abi_reg_args_spill(spill_ret), R1_SP);
goetz@6511 2904 __ lfd(F1_RET, _abi_reg_args_spill(spill_fret), R1_SP);
goetz@6458 2905
goetz@6458 2906 // Pop the unpack frame.
goetz@6458 2907 __ pop_frame();
goetz@6458 2908 __ restore_LR_CR(R0);
goetz@6458 2909
goetz@6458 2910 // stack: (top interpreter frame, ..., optional interpreter frame,
goetz@6458 2911 // optional c2i, caller of deoptee, ...).
goetz@6458 2912
goetz@6458 2913 // Initialize R14_state.
goetz@6458 2914 __ ld(R14_state, 0, R1_SP);
goetz@6495 2915 __ addi(R14_state, R14_state, -frame::interpreter_frame_cinterpreterstate_size_in_bytes());
goetz@6458 2916 // Also inititialize R15_prev_state.
goetz@6458 2917 __ restore_prev_state();
goetz@6458 2918
goetz@6458 2919 // Return to the interpreter entry point.
goetz@6458 2920 __ blr();
goetz@6458 2921 __ flush();
goetz@6458 2922 #else // COMPILER2
goetz@6458 2923 __ unimplemented("deopt blob needed only with compiler");
goetz@6458 2924 int exception_offset = __ pc() - start;
goetz@6458 2925 #endif // COMPILER2
goetz@6458 2926
goetz@6458 2927 _deopt_blob = DeoptimizationBlob::create(&buffer, oop_maps, 0, exception_offset, 0, first_frame_size_in_bytes / wordSize);
goetz@6458 2928 }
goetz@6458 2929
goetz@6458 2930 #ifdef COMPILER2
goetz@6458 2931 void SharedRuntime::generate_uncommon_trap_blob() {
goetz@6458 2932 // Allocate space for the code.
goetz@6458 2933 ResourceMark rm;
goetz@6458 2934 // Setup code generation tools.
goetz@6458 2935 CodeBuffer buffer("uncommon_trap_blob", 2048, 1024);
goetz@6458 2936 InterpreterMacroAssembler* masm = new InterpreterMacroAssembler(&buffer);
goetz@6458 2937 address start = __ pc();
goetz@6458 2938
goetz@6458 2939 Register unroll_block_reg = R21_tmp1;
goetz@6458 2940 Register klass_index_reg = R22_tmp2;
goetz@6458 2941 Register unc_trap_reg = R23_tmp3;
goetz@6458 2942
goetz@6458 2943 OopMapSet* oop_maps = new OopMapSet();
goetz@6511 2944 int frame_size_in_bytes = frame::abi_reg_args_size;
goetz@6458 2945 OopMap* map = new OopMap(frame_size_in_bytes / sizeof(jint), 0);
goetz@6458 2946
goetz@6458 2947 // stack: (deoptee, optional i2c, caller_of_deoptee, ...).
goetz@6458 2948
goetz@6458 2949 // Push a dummy `unpack_frame' and call
goetz@6458 2950 // `Deoptimization::uncommon_trap' to pack the compiled frame into a
goetz@6458 2951 // vframe array and return the `UnrollBlock' information.
goetz@6458 2952
goetz@6458 2953 // Save LR to compiled frame.
goetz@6458 2954 __ save_LR_CR(R11_scratch1);
goetz@6458 2955
goetz@6458 2956 // Push an "uncommon_trap" frame.
goetz@6511 2957 __ push_frame_reg_args(0, R11_scratch1);
goetz@6458 2958
goetz@6458 2959 // stack: (unpack frame, deoptee, optional i2c, caller_of_deoptee, ...).
goetz@6458 2960
goetz@6458 2961 // Set the `unpack_frame' as last_Java_frame.
goetz@6458 2962 // `Deoptimization::uncommon_trap' expects it and considers its
goetz@6458 2963 // sender frame as the deoptee frame.
goetz@6458 2964 // Remember the offset of the instruction whose address will be
goetz@6458 2965 // moved to R11_scratch1.
goetz@6458 2966 address gc_map_pc = __ get_PC_trash_LR(R11_scratch1);
goetz@6458 2967
goetz@6458 2968 __ set_last_Java_frame(/*sp*/R1_SP, /*pc*/R11_scratch1);
goetz@6458 2969
goetz@6458 2970 __ mr(klass_index_reg, R3);
goetz@6458 2971 __ call_VM_leaf(CAST_FROM_FN_PTR(address, Deoptimization::uncommon_trap),
goetz@6458 2972 R16_thread, klass_index_reg);
goetz@6458 2973
goetz@6458 2974 // Set an oopmap for the call site.
goetz@6458 2975 oop_maps->add_gc_map(gc_map_pc - start, map);
goetz@6458 2976
goetz@6458 2977 __ reset_last_Java_frame();
goetz@6458 2978
goetz@6458 2979 // Pop the `unpack frame'.
goetz@6458 2980 __ pop_frame();
goetz@6458 2981
goetz@6458 2982 // stack: (deoptee, optional i2c, caller_of_deoptee, ...).
goetz@6458 2983
goetz@6458 2984 // Save the return value.
goetz@6458 2985 __ mr(unroll_block_reg, R3_RET);
goetz@6458 2986
goetz@6458 2987 // Pop the uncommon_trap frame.
goetz@6458 2988 __ pop_frame();
goetz@6458 2989
goetz@6458 2990 // stack: (caller_of_deoptee, ...).
goetz@6458 2991
goetz@6458 2992 // Allocate new interpreter frame(s) and possibly a c2i adapter
goetz@6458 2993 // frame.
goetz@6458 2994 push_skeleton_frames(masm, false/*deopt*/,
goetz@6458 2995 unroll_block_reg,
goetz@6458 2996 R22_tmp2,
goetz@6458 2997 R23_tmp3,
goetz@6458 2998 R24_tmp4,
goetz@6458 2999 R25_tmp5,
goetz@6458 3000 R26_tmp6);
goetz@6458 3001
goetz@6458 3002 // stack: (skeletal interpreter frame, ..., optional skeletal
goetz@6458 3003 // interpreter frame, optional c2i, caller of deoptee, ...).
goetz@6458 3004
goetz@6458 3005 // Push a dummy `unpack_frame' taking care of float return values.
goetz@6458 3006 // Call `Deoptimization::unpack_frames' to layout information in the
goetz@6458 3007 // interpreter frames just created.
goetz@6458 3008
goetz@6458 3009 // Push a simple "unpack frame" here.
goetz@6511 3010 __ push_frame_reg_args(0, R11_scratch1);
goetz@6458 3011
goetz@6458 3012 // stack: (unpack frame, skeletal interpreter frame, ..., optional
goetz@6458 3013 // skeletal interpreter frame, optional c2i, caller of deoptee,
goetz@6458 3014 // ...).
goetz@6458 3015
goetz@6458 3016 // Set the "unpack_frame" as last_Java_frame.
goetz@6458 3017 __ get_PC_trash_LR(R11_scratch1);
goetz@6458 3018 __ set_last_Java_frame(/*sp*/R1_SP, /*pc*/R11_scratch1);
goetz@6458 3019
goetz@6458 3020 // Indicate it is the uncommon trap case.
goetz@6458 3021 __ li(unc_trap_reg, Deoptimization::Unpack_uncommon_trap);
goetz@6458 3022 // Let the unpacker layout information in the skeletal frames just
goetz@6458 3023 // allocated.
goetz@6458 3024 __ call_VM_leaf(CAST_FROM_FN_PTR(address, Deoptimization::unpack_frames),
goetz@6458 3025 R16_thread, unc_trap_reg);
goetz@6458 3026
goetz@6458 3027 __ reset_last_Java_frame();
goetz@6458 3028 // Pop the `unpack frame'.
goetz@6458 3029 __ pop_frame();
goetz@6458 3030 // Restore LR from top interpreter frame.
goetz@6458 3031 __ restore_LR_CR(R11_scratch1);
goetz@6458 3032
goetz@6458 3033 // stack: (top interpreter frame, ..., optional interpreter frame,
goetz@6458 3034 // optional c2i, caller of deoptee, ...).
goetz@6458 3035
goetz@6458 3036 // Initialize R14_state, ...
goetz@6458 3037 __ ld(R11_scratch1, 0, R1_SP);
goetz@6495 3038 __ addi(R14_state, R11_scratch1, -frame::interpreter_frame_cinterpreterstate_size_in_bytes());
goetz@6458 3039 // also initialize R15_prev_state.
goetz@6458 3040 __ restore_prev_state();
goetz@6458 3041 // Return to the interpreter entry point.
goetz@6458 3042 __ blr();
goetz@6458 3043
goetz@6458 3044 masm->flush();
goetz@6458 3045
goetz@6458 3046 _uncommon_trap_blob = UncommonTrapBlob::create(&buffer, oop_maps, frame_size_in_bytes/wordSize);
goetz@6458 3047 }
goetz@6458 3048 #endif // COMPILER2
goetz@6458 3049
goetz@6458 3050 // Generate a special Compile2Runtime blob that saves all registers, and setup oopmap.
goetz@6458 3051 SafepointBlob* SharedRuntime::generate_handler_blob(address call_ptr, int poll_type) {
goetz@6458 3052 assert(StubRoutines::forward_exception_entry() != NULL,
goetz@6458 3053 "must be generated before");
goetz@6458 3054
goetz@6458 3055 ResourceMark rm;
goetz@6458 3056 OopMapSet *oop_maps = new OopMapSet();
goetz@6458 3057 OopMap* map;
goetz@6458 3058
goetz@6458 3059 // Allocate space for the code. Setup code generation tools.
goetz@6458 3060 CodeBuffer buffer("handler_blob", 2048, 1024);
goetz@6458 3061 MacroAssembler* masm = new MacroAssembler(&buffer);
goetz@6458 3062
goetz@6458 3063 address start = __ pc();
goetz@6458 3064 int frame_size_in_bytes = 0;
goetz@6458 3065
goetz@6458 3066 RegisterSaver::ReturnPCLocation return_pc_location;
goetz@6458 3067 bool cause_return = (poll_type == POLL_AT_RETURN);
goetz@6458 3068 if (cause_return) {
goetz@6458 3069 // Nothing to do here. The frame has already been popped in MachEpilogNode.
goetz@6458 3070 // Register LR already contains the return pc.
goetz@6458 3071 return_pc_location = RegisterSaver::return_pc_is_lr;
goetz@6458 3072 } else {
goetz@6458 3073 // Use thread()->saved_exception_pc() as return pc.
goetz@6458 3074 return_pc_location = RegisterSaver::return_pc_is_thread_saved_exception_pc;
goetz@6458 3075 }
goetz@6458 3076
goetz@6458 3077 // Save registers, fpu state, and flags.
goetz@6511 3078 map = RegisterSaver::push_frame_reg_args_and_save_live_registers(masm,
goetz@6511 3079 &frame_size_in_bytes,
goetz@6511 3080 /*generate_oop_map=*/ true,
goetz@6511 3081 /*return_pc_adjustment=*/0,
goetz@6511 3082 return_pc_location);
goetz@6458 3083
goetz@6458 3084 // The following is basically a call_VM. However, we need the precise
goetz@6458 3085 // address of the call in order to generate an oopmap. Hence, we do all the
goetz@6458 3086 // work outselves.
goetz@6458 3087 __ set_last_Java_frame(/*sp=*/R1_SP, /*pc=*/noreg);
goetz@6458 3088
goetz@6458 3089 // The return address must always be correct so that the frame constructor
goetz@6458 3090 // never sees an invalid pc.
goetz@6458 3091
goetz@6458 3092 // Do the call
goetz@6458 3093 __ call_VM_leaf(call_ptr, R16_thread);
goetz@6458 3094 address calls_return_pc = __ last_calls_return_pc();
goetz@6458 3095
goetz@6458 3096 // Set an oopmap for the call site. This oopmap will map all
goetz@6458 3097 // oop-registers and debug-info registers as callee-saved. This
goetz@6458 3098 // will allow deoptimization at this safepoint to find all possible
goetz@6458 3099 // debug-info recordings, as well as let GC find all oops.
goetz@6458 3100 oop_maps->add_gc_map(calls_return_pc - start, map);
goetz@6458 3101
goetz@6458 3102 Label noException;
goetz@6458 3103
goetz@6458 3104 // Clear the last Java frame.
goetz@6458 3105 __ reset_last_Java_frame();
goetz@6458 3106
goetz@6458 3107 BLOCK_COMMENT(" Check pending exception.");
goetz@6458 3108 const Register pending_exception = R0;
goetz@6458 3109 __ ld(pending_exception, thread_(pending_exception));
goetz@6458 3110 __ cmpdi(CCR0, pending_exception, 0);
goetz@6458 3111 __ beq(CCR0, noException);
goetz@6458 3112
goetz@6458 3113 // Exception pending
goetz@6458 3114 RegisterSaver::restore_live_registers_and_pop_frame(masm,
goetz@6458 3115 frame_size_in_bytes,
goetz@6458 3116 /*restore_ctr=*/true);
goetz@6458 3117
goetz@6458 3118
goetz@6458 3119 BLOCK_COMMENT(" Jump to forward_exception_entry.");
goetz@6458 3120 // Jump to forward_exception_entry, with the issuing PC in LR
goetz@6458 3121 // so it looks like the original nmethod called forward_exception_entry.
goetz@6458 3122 __ b64_patchable(StubRoutines::forward_exception_entry(), relocInfo::runtime_call_type);
goetz@6458 3123
goetz@6458 3124 // No exception case.
goetz@6458 3125 __ BIND(noException);
goetz@6458 3126
goetz@6458 3127
goetz@6458 3128 // Normal exit, restore registers and exit.
goetz@6458 3129 RegisterSaver::restore_live_registers_and_pop_frame(masm,
goetz@6458 3130 frame_size_in_bytes,
goetz@6458 3131 /*restore_ctr=*/true);
goetz@6458 3132
goetz@6458 3133 __ blr();
goetz@6458 3134
goetz@6458 3135 // Make sure all code is generated
goetz@6458 3136 masm->flush();
goetz@6458 3137
goetz@6458 3138 // Fill-out other meta info
goetz@6458 3139 // CodeBlob frame size is in words.
goetz@6458 3140 return SafepointBlob::create(&buffer, oop_maps, frame_size_in_bytes / wordSize);
goetz@6458 3141 }
goetz@6458 3142
goetz@6458 3143 // generate_resolve_blob - call resolution (static/virtual/opt-virtual/ic-miss)
goetz@6458 3144 //
goetz@6458 3145 // Generate a stub that calls into the vm to find out the proper destination
goetz@6458 3146 // of a java call. All the argument registers are live at this point
goetz@6458 3147 // but since this is generic code we don't know what they are and the caller
goetz@6458 3148 // must do any gc of the args.
goetz@6458 3149 //
goetz@6458 3150 RuntimeStub* SharedRuntime::generate_resolve_blob(address destination, const char* name) {
goetz@6458 3151
goetz@6458 3152 // allocate space for the code
goetz@6458 3153 ResourceMark rm;
goetz@6458 3154
goetz@6458 3155 CodeBuffer buffer(name, 1000, 512);
goetz@6458 3156 MacroAssembler* masm = new MacroAssembler(&buffer);
goetz@6458 3157
goetz@6458 3158 int frame_size_in_bytes;
goetz@6458 3159
goetz@6458 3160 OopMapSet *oop_maps = new OopMapSet();
goetz@6458 3161 OopMap* map = NULL;
goetz@6458 3162
goetz@6458 3163 address start = __ pc();
goetz@6458 3164
goetz@6511 3165 map = RegisterSaver::push_frame_reg_args_and_save_live_registers(masm,
goetz@6511 3166 &frame_size_in_bytes,
goetz@6511 3167 /*generate_oop_map*/ true,
goetz@6511 3168 /*return_pc_adjustment*/ 0,
goetz@6511 3169 RegisterSaver::return_pc_is_lr);
goetz@6458 3170
goetz@6458 3171 // Use noreg as last_Java_pc, the return pc will be reconstructed
goetz@6458 3172 // from the physical frame.
goetz@6458 3173 __ set_last_Java_frame(/*sp*/R1_SP, noreg);
goetz@6458 3174
goetz@6458 3175 int frame_complete = __ offset();
goetz@6458 3176
goetz@6458 3177 // Pass R19_method as 2nd (optional) argument, used by
goetz@6458 3178 // counter_overflow_stub.
goetz@6458 3179 __ call_VM_leaf(destination, R16_thread, R19_method);
goetz@6458 3180 address calls_return_pc = __ last_calls_return_pc();
goetz@6458 3181 // Set an oopmap for the call site.
goetz@6458 3182 // We need this not only for callee-saved registers, but also for volatile
goetz@6458 3183 // registers that the compiler might be keeping live across a safepoint.
goetz@6458 3184 // Create the oopmap for the call's return pc.
goetz@6458 3185 oop_maps->add_gc_map(calls_return_pc - start, map);
goetz@6458 3186
goetz@6458 3187 // R3_RET contains the address we are going to jump to assuming no exception got installed.
goetz@6458 3188
goetz@6458 3189 // clear last_Java_sp
goetz@6458 3190 __ reset_last_Java_frame();
goetz@6458 3191
goetz@6458 3192 // Check for pending exceptions.
goetz@6458 3193 BLOCK_COMMENT("Check for pending exceptions.");
goetz@6458 3194 Label pending;
goetz@6458 3195 __ ld(R11_scratch1, thread_(pending_exception));
goetz@6458 3196 __ cmpdi(CCR0, R11_scratch1, 0);
goetz@6458 3197 __ bne(CCR0, pending);
goetz@6458 3198
goetz@6458 3199 __ mtctr(R3_RET); // Ctr will not be touched by restore_live_registers_and_pop_frame.
goetz@6458 3200
goetz@6458 3201 RegisterSaver::restore_live_registers_and_pop_frame(masm, frame_size_in_bytes, /*restore_ctr*/ false);
goetz@6458 3202
goetz@6458 3203 // Get the returned methodOop.
goetz@6458 3204 __ get_vm_result_2(R19_method);
goetz@6458 3205
goetz@6458 3206 __ bctr();
goetz@6458 3207
goetz@6458 3208
goetz@6458 3209 // Pending exception after the safepoint.
goetz@6458 3210 __ BIND(pending);
goetz@6458 3211
goetz@6458 3212 RegisterSaver::restore_live_registers_and_pop_frame(masm, frame_size_in_bytes, /*restore_ctr*/ true);
goetz@6458 3213
goetz@6458 3214 // exception pending => remove activation and forward to exception handler
goetz@6458 3215
goetz@6458 3216 __ li(R11_scratch1, 0);
goetz@6458 3217 __ ld(R3_ARG1, thread_(pending_exception));
goetz@6458 3218 __ std(R11_scratch1, in_bytes(JavaThread::vm_result_offset()), R16_thread);
goetz@6458 3219 __ b64_patchable(StubRoutines::forward_exception_entry(), relocInfo::runtime_call_type);
goetz@6458 3220
goetz@6458 3221 // -------------
goetz@6458 3222 // Make sure all code is generated.
goetz@6458 3223 masm->flush();
goetz@6458 3224
goetz@6458 3225 // return the blob
goetz@6458 3226 // frame_size_words or bytes??
goetz@6458 3227 return RuntimeStub::new_runtime_stub(name, &buffer, frame_complete, frame_size_in_bytes/wordSize,
goetz@6458 3228 oop_maps, true);
goetz@6458 3229 }

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