process.cc revision 5231:240f304b5195
1/* 2 * Copyright (c) 2003-2004 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Gabe Black 29 * Ali Saidi 30 */ 31 32#include "arch/sparc/asi.hh" 33#include "arch/sparc/handlers.hh" 34#include "arch/sparc/isa_traits.hh" 35#include "arch/sparc/process.hh" 36#include "arch/sparc/types.hh" 37#include "base/loader/object_file.hh" 38#include "base/loader/elf_object.hh" 39#include "base/misc.hh" 40#include "cpu/thread_context.hh" 41#include "mem/page_table.hh" 42#include "sim/process_impl.hh" 43#include "mem/translating_port.hh" 44#include "sim/system.hh" 45 46using namespace std; 47using namespace SparcISA; 48 49 50SparcLiveProcess::SparcLiveProcess(LiveProcessParams * params, 51 ObjectFile *objFile) 52 : LiveProcess(params, objFile) 53{ 54 55 // XXX all the below need to be updated for SPARC - Ali 56 brk_point = objFile->dataBase() + objFile->dataSize() + objFile->bssSize(); 57 brk_point = roundUp(brk_point, VMPageSize); 58 59 // Set pointer for next thread stack. Reserve 8M for main stack. 60 next_thread_stack_base = stack_base - (8 * 1024 * 1024); 61 62 //Initialize these to 0s 63 fillStart = 0; 64 spillStart = 0; 65} 66 67void SparcLiveProcess::handleTrap(int trapNum, ThreadContext *tc) 68{ 69 switch(trapNum) 70 { 71 case 0x01: //Software breakpoint 72 warn("Software breakpoint encountered at pc %#x.\n", tc->readPC()); 73 break; 74 case 0x02: //Division by zero 75 warn("Software signaled a division by zero at pc %#x.\n", 76 tc->readPC()); 77 break; 78 case 0x03: //Flush window trap 79 flushWindows(tc); 80 break; 81 case 0x04: //Clean windows 82 warn("Ignoring process request for clean register " 83 "windows at pc %#x.\n", tc->readPC()); 84 break; 85 case 0x05: //Range check 86 warn("Software signaled a range check at pc %#x.\n", 87 tc->readPC()); 88 break; 89 case 0x06: //Fix alignment 90 warn("Ignoring process request for os assisted unaligned accesses " 91 "at pc %#x.\n", tc->readPC()); 92 break; 93 case 0x07: //Integer overflow 94 warn("Software signaled an integer overflow at pc %#x.\n", 95 tc->readPC()); 96 break; 97 case 0x32: //Get integer condition codes 98 warn("Ignoring process request to get the integer condition codes " 99 "at pc %#x.\n", tc->readPC()); 100 break; 101 case 0x33: //Set integer condition codes 102 warn("Ignoring process request to set the integer condition codes " 103 "at pc %#x.\n", tc->readPC()); 104 break; 105 default: 106 panic("Unimplemented trap to operating system: trap number %#x.\n", trapNum); 107 } 108} 109 110void 111Sparc32LiveProcess::startup() 112{ 113 if (checkpointRestored) 114 return; 115 116 argsInit(32 / 8, VMPageSize); 117 118 //From the SPARC ABI 119 120 //The process runs in user mode with 32 bit addresses 121 threadContexts[0]->setMiscReg(MISCREG_PSTATE, 0x0a); 122 123 //Setup default FP state 124 threadContexts[0]->setMiscRegNoEffect(MISCREG_FSR, 0); 125 126 threadContexts[0]->setMiscRegNoEffect(MISCREG_TICK, 0); 127 // 128 /* 129 * Register window management registers 130 */ 131 132 //No windows contain info from other programs 133 //threadContexts[0]->setMiscRegNoEffect(MISCREG_OTHERWIN, 0); 134 threadContexts[0]->setIntReg(NumIntArchRegs + 6, 0); 135 //There are no windows to pop 136 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANRESTORE, 0); 137 threadContexts[0]->setIntReg(NumIntArchRegs + 4, 0); 138 //All windows are available to save into 139 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANSAVE, NWindows - 2); 140 threadContexts[0]->setIntReg(NumIntArchRegs + 3, NWindows - 2); 141 //All windows are "clean" 142 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CLEANWIN, NWindows); 143 threadContexts[0]->setIntReg(NumIntArchRegs + 5, NWindows); 144 //Start with register window 0 145 threadContexts[0]->setMiscRegNoEffect(MISCREG_CWP, 0); 146 //Always use spill and fill traps 0 147 //threadContexts[0]->setMiscRegNoEffect(MISCREG_WSTATE, 0); 148 threadContexts[0]->setIntReg(NumIntArchRegs + 7, 0); 149 //Set the trap level to 0 150 threadContexts[0]->setMiscRegNoEffect(MISCREG_TL, 0); 151 //Set the ASI register to something fixed 152 threadContexts[0]->setMiscRegNoEffect(MISCREG_ASI, ASI_PRIMARY); 153 154 /* 155 * T1 specific registers 156 */ 157 //Turn on the icache, dcache, dtb translation, and itb translation. 158 threadContexts[0]->setMiscRegNoEffect(MISCREG_MMU_LSU_CTRL, 15); 159} 160 161void 162Sparc64LiveProcess::startup() 163{ 164 if (checkpointRestored) 165 return; 166 167 argsInit(sizeof(IntReg), VMPageSize); 168 169 //From the SPARC ABI 170 171 //The process runs in user mode 172 threadContexts[0]->setMiscReg(MISCREG_PSTATE, 0x02); 173 174 //Setup default FP state 175 threadContexts[0]->setMiscRegNoEffect(MISCREG_FSR, 0); 176 177 threadContexts[0]->setMiscRegNoEffect(MISCREG_TICK, 0); 178 179 /* 180 * Register window management registers 181 */ 182 183 //No windows contain info from other programs 184 //threadContexts[0]->setMiscRegNoEffect(MISCREG_OTHERWIN, 0); 185 threadContexts[0]->setIntReg(NumIntArchRegs + 6, 0); 186 //There are no windows to pop 187 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANRESTORE, 0); 188 threadContexts[0]->setIntReg(NumIntArchRegs + 4, 0); 189 //All windows are available to save into 190 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANSAVE, NWindows - 2); 191 threadContexts[0]->setIntReg(NumIntArchRegs + 3, NWindows - 2); 192 //All windows are "clean" 193 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CLEANWIN, NWindows); 194 threadContexts[0]->setIntReg(NumIntArchRegs + 5, NWindows); 195 //Start with register window 0 196 threadContexts[0]->setMiscRegNoEffect(MISCREG_CWP, 0); 197 //Always use spill and fill traps 0 198 //threadContexts[0]->setMiscRegNoEffect(MISCREG_WSTATE, 0); 199 threadContexts[0]->setIntReg(NumIntArchRegs + 7, 0); 200 //Set the trap level to 0 201 threadContexts[0]->setMiscRegNoEffect(MISCREG_TL, 0); 202 //Set the ASI register to something fixed 203 threadContexts[0]->setMiscRegNoEffect(MISCREG_ASI, ASI_PRIMARY); 204 205 /* 206 * T1 specific registers 207 */ 208 //Turn on the icache, dcache, dtb translation, and itb translation. 209 threadContexts[0]->setMiscRegNoEffect(MISCREG_MMU_LSU_CTRL, 15); 210} 211 212M5_32_auxv_t::M5_32_auxv_t(int32_t type, int32_t val) 213{ 214 a_type = TheISA::htog(type); 215 a_val = TheISA::htog(val); 216} 217 218M5_64_auxv_t::M5_64_auxv_t(int64_t type, int64_t val) 219{ 220 a_type = TheISA::htog(type); 221 a_val = TheISA::htog(val); 222} 223 224void 225Sparc64LiveProcess::argsInit(int intSize, int pageSize) 226{ 227 typedef M5_64_auxv_t auxv_t; 228 Process::startup(); 229 230 string filename; 231 if(argv.size() < 1) 232 filename = ""; 233 else 234 filename = argv[0]; 235 236 Addr alignmentMask = ~(intSize - 1); 237 238 // load object file into target memory 239 objFile->loadSections(initVirtMem); 240 241 enum hardwareCaps 242 { 243 M5_HWCAP_SPARC_FLUSH = 1, 244 M5_HWCAP_SPARC_STBAR = 2, 245 M5_HWCAP_SPARC_SWAP = 4, 246 M5_HWCAP_SPARC_MULDIV = 8, 247 M5_HWCAP_SPARC_V9 = 16, 248 //This one should technically only be set 249 //if there is a cheetah or cheetah_plus tlb, 250 //but we'll use it all the time 251 M5_HWCAP_SPARC_ULTRA3 = 32 252 }; 253 254 const int64_t hwcap = 255 M5_HWCAP_SPARC_FLUSH | 256 M5_HWCAP_SPARC_STBAR | 257 M5_HWCAP_SPARC_SWAP | 258 M5_HWCAP_SPARC_MULDIV | 259 M5_HWCAP_SPARC_V9 | 260 M5_HWCAP_SPARC_ULTRA3; 261 262 263 //Setup the auxilliary vectors. These will already have endian conversion. 264 //Auxilliary vectors are loaded only for elf formatted executables. 265 ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile); 266 if(elfObject) 267 { 268 //Bits which describe the system hardware capabilities 269 auxv.push_back(auxv_t(M5_AT_HWCAP, hwcap)); 270 //The system page size 271 auxv.push_back(auxv_t(M5_AT_PAGESZ, SparcISA::VMPageSize)); 272 //Defined to be 100 in the kernel source. 273 //Frequency at which times() increments 274 auxv.push_back(auxv_t(M5_AT_CLKTCK, 100)); 275 // For statically linked executables, this is the virtual address of the 276 // program header tables if they appear in the executable image 277 auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable())); 278 // This is the size of a program header entry from the elf file. 279 auxv.push_back(auxv_t(M5_AT_PHENT, elfObject->programHeaderSize())); 280 // This is the number of program headers from the original elf file. 281 auxv.push_back(auxv_t(M5_AT_PHNUM, elfObject->programHeaderCount())); 282 //This is the address of the elf "interpreter", It should be set 283 //to 0 for regular executables. It should be something else 284 //(not sure what) for dynamic libraries. 285 auxv.push_back(auxv_t(M5_AT_BASE, 0)); 286 //This is hardwired to 0 in the elf loading code in the kernel 287 auxv.push_back(auxv_t(M5_AT_FLAGS, 0)); 288 //The entry point to the program 289 auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint())); 290 //Different user and group IDs 291 auxv.push_back(auxv_t(M5_AT_UID, uid())); 292 auxv.push_back(auxv_t(M5_AT_EUID, euid())); 293 auxv.push_back(auxv_t(M5_AT_GID, gid())); 294 auxv.push_back(auxv_t(M5_AT_EGID, egid())); 295 //Whether to enable "secure mode" in the executable 296 auxv.push_back(auxv_t(M5_AT_SECURE, 0)); 297 } 298 299 //Figure out how big the initial stack needs to be 300 301 // The unaccounted for 0 at the top of the stack 302 int mysterious_size = intSize; 303 304 //This is the name of the file which is present on the initial stack 305 //It's purpose is to let the user space linker examine the original file. 306 int file_name_size = filename.size() + 1; 307 308 int env_data_size = 0; 309 for (int i = 0; i < envp.size(); ++i) { 310 env_data_size += envp[i].size() + 1; 311 } 312 int arg_data_size = 0; 313 for (int i = 0; i < argv.size(); ++i) { 314 arg_data_size += argv[i].size() + 1; 315 } 316 317 //The info_block needs to be padded so it's size is a multiple of the 318 //alignment mask. Also, it appears that there needs to be at least some 319 //padding, so if the size is already a multiple, we need to increase it 320 //anyway. 321 int info_block_size = 322 (file_name_size + 323 env_data_size + 324 arg_data_size + 325 intSize) & alignmentMask; 326 327 int info_block_padding = 328 info_block_size - 329 file_name_size - 330 env_data_size - 331 arg_data_size; 332 333 //Each auxilliary vector is two 8 byte words 334 int aux_array_size = intSize * 2 * (auxv.size() + 1); 335 336 int envp_array_size = intSize * (envp.size() + 1); 337 int argv_array_size = intSize * (argv.size() + 1); 338 339 int argc_size = intSize; 340 int window_save_size = intSize * 16; 341 342 int space_needed = 343 mysterious_size + 344 info_block_size + 345 aux_array_size + 346 envp_array_size + 347 argv_array_size + 348 argc_size + 349 window_save_size; 350 351 stack_min = stack_base - space_needed; 352 stack_min &= alignmentMask; 353 stack_size = stack_base - stack_min; 354 355 // map memory 356 pTable->allocate(roundDown(stack_min, pageSize), 357 roundUp(stack_size, pageSize)); 358 359 // map out initial stack contents 360 Addr mysterious_base = stack_base - mysterious_size; 361 Addr file_name_base = mysterious_base - file_name_size; 362 Addr env_data_base = file_name_base - env_data_size; 363 Addr arg_data_base = env_data_base - arg_data_size; 364 Addr auxv_array_base = arg_data_base - aux_array_size - info_block_padding; 365 Addr envp_array_base = auxv_array_base - envp_array_size; 366 Addr argv_array_base = envp_array_base - argv_array_size; 367 Addr argc_base = argv_array_base - argc_size; 368#ifndef NDEBUG 369 // only used in DPRINTF 370 Addr window_save_base = argc_base - window_save_size; 371#endif 372 373 DPRINTF(Sparc, "The addresses of items on the initial stack:\n"); 374 DPRINTF(Sparc, "0x%x - file name\n", file_name_base); 375 DPRINTF(Sparc, "0x%x - env data\n", env_data_base); 376 DPRINTF(Sparc, "0x%x - arg data\n", arg_data_base); 377 DPRINTF(Sparc, "0x%x - auxv array\n", auxv_array_base); 378 DPRINTF(Sparc, "0x%x - envp array\n", envp_array_base); 379 DPRINTF(Sparc, "0x%x - argv array\n", argv_array_base); 380 DPRINTF(Sparc, "0x%x - argc \n", argc_base); 381 DPRINTF(Sparc, "0x%x - window save\n", window_save_base); 382 DPRINTF(Sparc, "0x%x - stack min\n", stack_min); 383 384 // write contents to stack 385 386 // figure out argc 387 uint64_t argc = argv.size(); 388 uint64_t guestArgc = TheISA::htog(argc); 389 390 //Write out the mysterious 0 391 uint64_t mysterious_zero = 0; 392 initVirtMem->writeBlob(mysterious_base, 393 (uint8_t*)&mysterious_zero, mysterious_size); 394 395 //Write the file name 396 initVirtMem->writeString(file_name_base, filename.c_str()); 397 398 //Copy the aux stuff 399 for(int x = 0; x < auxv.size(); x++) 400 { 401 initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize, 402 (uint8_t*)&(auxv[x].a_type), intSize); 403 initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize, 404 (uint8_t*)&(auxv[x].a_val), intSize); 405 } 406 //Write out the terminating zeroed auxilliary vector 407 const uint64_t zero = 0; 408 initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(), 409 (uint8_t*)&zero, 2 * intSize); 410 411 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem); 412 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem); 413 414 initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize); 415 416 //Stuff the trap handlers into the processes address space. 417 //Since the stack grows down and is the highest area in the processes 418 //address space, we can put stuff above it and stay out of the way. 419 int fillSize = sizeof(MachInst) * numFillInsts; 420 int spillSize = sizeof(MachInst) * numSpillInsts; 421 fillStart = stack_base; 422 spillStart = fillStart + fillSize; 423 initVirtMem->writeBlob(fillStart, (uint8_t*)fillHandler64, fillSize); 424 initVirtMem->writeBlob(spillStart, (uint8_t*)spillHandler64, spillSize); 425 426 //Set up the thread context to start running the process 427 assert(NumArgumentRegs >= 2); 428 threadContexts[0]->setIntReg(ArgumentReg[0], argc); 429 threadContexts[0]->setIntReg(ArgumentReg[1], argv_array_base); 430 threadContexts[0]->setIntReg(StackPointerReg, stack_min - StackBias); 431 432 // %g1 is a pointer to a function that should be run at exit. Since we 433 // don't have anything like that, it should be set to 0. 434 threadContexts[0]->setIntReg(1, 0); 435 436 Addr prog_entry = objFile->entryPoint(); 437 threadContexts[0]->setPC(prog_entry); 438 threadContexts[0]->setNextPC(prog_entry + sizeof(MachInst)); 439 threadContexts[0]->setNextNPC(prog_entry + (2 * sizeof(MachInst))); 440 441 //Align the "stack_min" to a page boundary. 442 stack_min = roundDown(stack_min, pageSize); 443 444// num_processes++; 445} 446 447void 448Sparc32LiveProcess::argsInit(int intSize, int pageSize) 449{ 450 typedef M5_32_auxv_t auxv_t; 451 Process::startup(); 452 453 string filename; 454 if(argv.size() < 1) 455 filename = ""; 456 else 457 filename = argv[0]; 458 459 //Even though this is a 32 bit process, the ABI says we still need to 460 //maintain double word alignment of the stack pointer. 461 Addr alignmentMask = ~(8 - 1); 462 463 // load object file into target memory 464 objFile->loadSections(initVirtMem); 465 466 //These are the auxilliary vector types 467 enum auxTypes 468 { 469 SPARC_AT_HWCAP = 16, 470 SPARC_AT_PAGESZ = 6, 471 SPARC_AT_CLKTCK = 17, 472 SPARC_AT_PHDR = 3, 473 SPARC_AT_PHENT = 4, 474 SPARC_AT_PHNUM = 5, 475 SPARC_AT_BASE = 7, 476 SPARC_AT_FLAGS = 8, 477 SPARC_AT_ENTRY = 9, 478 SPARC_AT_UID = 11, 479 SPARC_AT_EUID = 12, 480 SPARC_AT_GID = 13, 481 SPARC_AT_EGID = 14, 482 SPARC_AT_SECURE = 23 483 }; 484 485 enum hardwareCaps 486 { 487 M5_HWCAP_SPARC_FLUSH = 1, 488 M5_HWCAP_SPARC_STBAR = 2, 489 M5_HWCAP_SPARC_SWAP = 4, 490 M5_HWCAP_SPARC_MULDIV = 8, 491 M5_HWCAP_SPARC_V9 = 16, 492 //This one should technically only be set 493 //if there is a cheetah or cheetah_plus tlb, 494 //but we'll use it all the time 495 M5_HWCAP_SPARC_ULTRA3 = 32 496 }; 497 498 const int64_t hwcap = 499 M5_HWCAP_SPARC_FLUSH | 500 M5_HWCAP_SPARC_STBAR | 501 M5_HWCAP_SPARC_SWAP | 502 M5_HWCAP_SPARC_MULDIV | 503 M5_HWCAP_SPARC_V9 | 504 M5_HWCAP_SPARC_ULTRA3; 505 506 507 //Setup the auxilliary vectors. These will already have endian conversion. 508 //Auxilliary vectors are loaded only for elf formatted executables. 509 ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile); 510 if(elfObject) 511 { 512 //Bits which describe the system hardware capabilities 513 auxv.push_back(auxv_t(SPARC_AT_HWCAP, hwcap)); 514 //The system page size 515 auxv.push_back(auxv_t(SPARC_AT_PAGESZ, SparcISA::VMPageSize)); 516 //Defined to be 100 in the kernel source. 517 //Frequency at which times() increments 518 auxv.push_back(auxv_t(SPARC_AT_CLKTCK, 100)); 519 // For statically linked executables, this is the virtual address of the 520 // program header tables if they appear in the executable image 521 auxv.push_back(auxv_t(SPARC_AT_PHDR, elfObject->programHeaderTable())); 522 // This is the size of a program header entry from the elf file. 523 auxv.push_back(auxv_t(SPARC_AT_PHENT, elfObject->programHeaderSize())); 524 // This is the number of program headers from the original elf file. 525 auxv.push_back(auxv_t(SPARC_AT_PHNUM, elfObject->programHeaderCount())); 526 //This is the address of the elf "interpreter", It should be set 527 //to 0 for regular executables. It should be something else 528 //(not sure what) for dynamic libraries. 529 auxv.push_back(auxv_t(SPARC_AT_BASE, 0)); 530 //This is hardwired to 0 in the elf loading code in the kernel 531 auxv.push_back(auxv_t(SPARC_AT_FLAGS, 0)); 532 //The entry point to the program 533 auxv.push_back(auxv_t(SPARC_AT_ENTRY, objFile->entryPoint())); 534 //Different user and group IDs 535 auxv.push_back(auxv_t(SPARC_AT_UID, uid())); 536 auxv.push_back(auxv_t(SPARC_AT_EUID, euid())); 537 auxv.push_back(auxv_t(SPARC_AT_GID, gid())); 538 auxv.push_back(auxv_t(SPARC_AT_EGID, egid())); 539 //Whether to enable "secure mode" in the executable 540 auxv.push_back(auxv_t(SPARC_AT_SECURE, 0)); 541 } 542 543 //Figure out how big the initial stack needs to be 544 545 // The unaccounted for 8 byte 0 at the top of the stack 546 int mysterious_size = 8; 547 548 //This is the name of the file which is present on the initial stack 549 //It's purpose is to let the user space linker examine the original file. 550 int file_name_size = filename.size() + 1; 551 552 int env_data_size = 0; 553 for (int i = 0; i < envp.size(); ++i) { 554 env_data_size += envp[i].size() + 1; 555 } 556 int arg_data_size = 0; 557 for (int i = 0; i < argv.size(); ++i) { 558 arg_data_size += argv[i].size() + 1; 559 } 560 561 //The info_block - This seems to need an pad for some reason. 562 int info_block_size = 563 (mysterious_size + 564 file_name_size + 565 env_data_size + 566 arg_data_size + intSize); 567 568 //Each auxilliary vector is two 4 byte words 569 int aux_array_size = intSize * 2 * (auxv.size() + 1); 570 571 int envp_array_size = intSize * (envp.size() + 1); 572 int argv_array_size = intSize * (argv.size() + 1); 573 574 int argc_size = intSize; 575 int window_save_size = intSize * 16; 576 577 int space_needed = 578 info_block_size + 579 aux_array_size + 580 envp_array_size + 581 argv_array_size + 582 argc_size + 583 window_save_size; 584 585 stack_min = stack_base - space_needed; 586 stack_min &= alignmentMask; 587 stack_size = stack_base - stack_min; 588 589 // map memory 590 pTable->allocate(roundDown(stack_min, pageSize), 591 roundUp(stack_size, pageSize)); 592 593 // map out initial stack contents 594 uint32_t window_save_base = stack_min; 595 uint32_t argc_base = window_save_base + window_save_size; 596 uint32_t argv_array_base = argc_base + argc_size; 597 uint32_t envp_array_base = argv_array_base + argv_array_size; 598 uint32_t auxv_array_base = envp_array_base + envp_array_size; 599 //The info block is pushed up against the top of the stack, while 600 //the rest of the initial stack frame is aligned to an 8 byte boudary. 601 uint32_t arg_data_base = stack_base - info_block_size + intSize; 602 uint32_t env_data_base = arg_data_base + arg_data_size; 603 uint32_t file_name_base = env_data_base + env_data_size; 604 uint32_t mysterious_base = file_name_base + file_name_size; 605 606 DPRINTF(Sparc, "The addresses of items on the initial stack:\n"); 607 DPRINTF(Sparc, "0x%x - file name\n", file_name_base); 608 DPRINTF(Sparc, "0x%x - env data\n", env_data_base); 609 DPRINTF(Sparc, "0x%x - arg data\n", arg_data_base); 610 DPRINTF(Sparc, "0x%x - auxv array\n", auxv_array_base); 611 DPRINTF(Sparc, "0x%x - envp array\n", envp_array_base); 612 DPRINTF(Sparc, "0x%x - argv array\n", argv_array_base); 613 DPRINTF(Sparc, "0x%x - argc \n", argc_base); 614 DPRINTF(Sparc, "0x%x - window save\n", window_save_base); 615 DPRINTF(Sparc, "0x%x - stack min\n", stack_min); 616 617 // write contents to stack 618 619 // figure out argc 620 uint32_t argc = argv.size(); 621 uint32_t guestArgc = TheISA::htog(argc); 622 623 //Write out the mysterious 0 624 uint64_t mysterious_zero = 0; 625 initVirtMem->writeBlob(mysterious_base, 626 (uint8_t*)&mysterious_zero, mysterious_size); 627 628 //Write the file name 629 initVirtMem->writeString(file_name_base, filename.c_str()); 630 631 //Copy the aux stuff 632 for(int x = 0; x < auxv.size(); x++) 633 { 634 initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize, 635 (uint8_t*)&(auxv[x].a_type), intSize); 636 initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize, 637 (uint8_t*)&(auxv[x].a_val), intSize); 638 } 639 //Write out the terminating zeroed auxilliary vector 640 const uint64_t zero = 0; 641 initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(), 642 (uint8_t*)&zero, 2 * intSize); 643 644 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem); 645 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem); 646 647 initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize); 648 649 //Stuff the trap handlers into the processes address space. 650 //Since the stack grows down and is the highest area in the processes 651 //address space, we can put stuff above it and stay out of the way. 652 int fillSize = sizeof(MachInst) * numFillInsts; 653 int spillSize = sizeof(MachInst) * numSpillInsts; 654 fillStart = stack_base; 655 spillStart = fillStart + fillSize; 656 initVirtMem->writeBlob(fillStart, (uint8_t*)fillHandler32, fillSize); 657 initVirtMem->writeBlob(spillStart, (uint8_t*)spillHandler32, spillSize); 658 659 //Set up the thread context to start running the process 660 //assert(NumArgumentRegs >= 2); 661 //threadContexts[0]->setIntReg(ArgumentReg[0], argc); 662 //threadContexts[0]->setIntReg(ArgumentReg[1], argv_array_base); 663 threadContexts[0]->setIntReg(StackPointerReg, stack_min); 664 665 // %g1 is a pointer to a function that should be run at exit. Since we 666 // don't have anything like that, it should be set to 0. 667 threadContexts[0]->setIntReg(1, 0); 668 669 uint32_t prog_entry = objFile->entryPoint(); 670 threadContexts[0]->setPC(prog_entry); 671 threadContexts[0]->setNextPC(prog_entry + sizeof(MachInst)); 672 threadContexts[0]->setNextNPC(prog_entry + (2 * sizeof(MachInst))); 673 674 //Align the "stack_min" to a page boundary. 675 stack_min = roundDown(stack_min, pageSize); 676 677// num_processes++; 678} 679 680void Sparc32LiveProcess::flushWindows(ThreadContext *tc) 681{ 682 IntReg Cansave = tc->readIntReg(NumIntArchRegs + 3); 683 IntReg Canrestore = tc->readIntReg(NumIntArchRegs + 4); 684 IntReg Otherwin = tc->readIntReg(NumIntArchRegs + 6); 685 MiscReg CWP = tc->readMiscReg(MISCREG_CWP); 686 MiscReg origCWP = CWP; 687 CWP = (CWP + Cansave + 2) % NWindows; 688 while(NWindows - 2 - Cansave != 0) 689 { 690 if (Otherwin) { 691 panic("Otherwin non-zero.\n"); 692 } else { 693 tc->setMiscReg(MISCREG_CWP, CWP); 694 //Do the stores 695 IntReg sp = tc->readIntReg(StackPointerReg); 696 for (int index = 16; index < 32; index++) { 697 IntReg regVal = tc->readIntReg(index); 698 regVal = htog(regVal); 699 if (!tc->getMemPort()->tryWriteBlob( 700 sp + (index - 16) * 4, (uint8_t *)®Val, 4)) { 701 warn("Failed to save register to the stack when " 702 "flushing windows.\n"); 703 } 704 } 705 Canrestore--; 706 Cansave++; 707 CWP = (CWP + 1) % NWindows; 708 } 709 } 710 tc->setIntReg(NumIntArchRegs + 3, Cansave); 711 tc->setIntReg(NumIntArchRegs + 4, Canrestore); 712 tc->setMiscReg(MISCREG_CWP, origCWP); 713} 714 715void Sparc64LiveProcess::flushWindows(ThreadContext *tc) 716{ 717 IntReg Cansave = tc->readIntReg(NumIntArchRegs + 3); 718 IntReg Canrestore = tc->readIntReg(NumIntArchRegs + 4); 719 IntReg Otherwin = tc->readIntReg(NumIntArchRegs + 6); 720 MiscReg CWP = tc->readMiscReg(MISCREG_CWP); 721 MiscReg origCWP = CWP; 722 CWP = (CWP + Cansave + 2) % NWindows; 723 while(NWindows - 2 - Cansave != 0) 724 { 725 if (Otherwin) { 726 panic("Otherwin non-zero.\n"); 727 } else { 728 tc->setMiscReg(MISCREG_CWP, CWP); 729 //Do the stores 730 IntReg sp = tc->readIntReg(StackPointerReg); 731 for (int index = 16; index < 32; index++) { 732 IntReg regVal = tc->readIntReg(index); 733 regVal = htog(regVal); 734 if (!tc->getMemPort()->tryWriteBlob( 735 sp + 2047 + (index - 16) * 8, (uint8_t *)®Val, 8)) { 736 warn("Failed to save register to the stack when " 737 "flushing windows.\n"); 738 } 739 } 740 Canrestore--; 741 Cansave++; 742 CWP = (CWP + 1) % NWindows; 743 } 744 } 745 tc->setIntReg(NumIntArchRegs + 3, Cansave); 746 tc->setIntReg(NumIntArchRegs + 4, Canrestore); 747 tc->setMiscReg(MISCREG_CWP, origCWP); 748} 749