process.cc revision 5154
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 argsInit(32 / 8, VMPageSize); 114 115 //From the SPARC ABI 116 117 //The process runs in user mode with 32 bit addresses 118 threadContexts[0]->setMiscReg(MISCREG_PSTATE, 0x0a); 119 120 //Setup default FP state 121 threadContexts[0]->setMiscRegNoEffect(MISCREG_FSR, 0); 122 123 threadContexts[0]->setMiscRegNoEffect(MISCREG_TICK, 0); 124 // 125 /* 126 * Register window management registers 127 */ 128 129 //No windows contain info from other programs 130 //threadContexts[0]->setMiscRegNoEffect(MISCREG_OTHERWIN, 0); 131 threadContexts[0]->setIntReg(NumIntArchRegs + 6, 0); 132 //There are no windows to pop 133 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANRESTORE, 0); 134 threadContexts[0]->setIntReg(NumIntArchRegs + 4, 0); 135 //All windows are available to save into 136 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANSAVE, NWindows - 2); 137 threadContexts[0]->setIntReg(NumIntArchRegs + 3, NWindows - 2); 138 //All windows are "clean" 139 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CLEANWIN, NWindows); 140 threadContexts[0]->setIntReg(NumIntArchRegs + 5, NWindows); 141 //Start with register window 0 142 threadContexts[0]->setMiscRegNoEffect(MISCREG_CWP, 0); 143 //Always use spill and fill traps 0 144 //threadContexts[0]->setMiscRegNoEffect(MISCREG_WSTATE, 0); 145 threadContexts[0]->setIntReg(NumIntArchRegs + 7, 0); 146 //Set the trap level to 0 147 threadContexts[0]->setMiscRegNoEffect(MISCREG_TL, 0); 148 //Set the ASI register to something fixed 149 threadContexts[0]->setMiscRegNoEffect(MISCREG_ASI, ASI_PRIMARY); 150 151 /* 152 * T1 specific registers 153 */ 154 //Turn on the icache, dcache, dtb translation, and itb translation. 155 threadContexts[0]->setMiscRegNoEffect(MISCREG_MMU_LSU_CTRL, 15); 156} 157 158void 159Sparc64LiveProcess::startup() 160{ 161 argsInit(sizeof(IntReg), VMPageSize); 162 163 //From the SPARC ABI 164 165 //The process runs in user mode 166 threadContexts[0]->setMiscReg(MISCREG_PSTATE, 0x02); 167 168 //Setup default FP state 169 threadContexts[0]->setMiscRegNoEffect(MISCREG_FSR, 0); 170 171 threadContexts[0]->setMiscRegNoEffect(MISCREG_TICK, 0); 172 173 /* 174 * Register window management registers 175 */ 176 177 //No windows contain info from other programs 178 //threadContexts[0]->setMiscRegNoEffect(MISCREG_OTHERWIN, 0); 179 threadContexts[0]->setIntReg(NumIntArchRegs + 6, 0); 180 //There are no windows to pop 181 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANRESTORE, 0); 182 threadContexts[0]->setIntReg(NumIntArchRegs + 4, 0); 183 //All windows are available to save into 184 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANSAVE, NWindows - 2); 185 threadContexts[0]->setIntReg(NumIntArchRegs + 3, NWindows - 2); 186 //All windows are "clean" 187 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CLEANWIN, NWindows); 188 threadContexts[0]->setIntReg(NumIntArchRegs + 5, NWindows); 189 //Start with register window 0 190 threadContexts[0]->setMiscRegNoEffect(MISCREG_CWP, 0); 191 //Always use spill and fill traps 0 192 //threadContexts[0]->setMiscRegNoEffect(MISCREG_WSTATE, 0); 193 threadContexts[0]->setIntReg(NumIntArchRegs + 7, 0); 194 //Set the trap level to 0 195 threadContexts[0]->setMiscRegNoEffect(MISCREG_TL, 0); 196 //Set the ASI register to something fixed 197 threadContexts[0]->setMiscRegNoEffect(MISCREG_ASI, ASI_PRIMARY); 198 199 /* 200 * T1 specific registers 201 */ 202 //Turn on the icache, dcache, dtb translation, and itb translation. 203 threadContexts[0]->setMiscRegNoEffect(MISCREG_MMU_LSU_CTRL, 15); 204} 205 206M5_32_auxv_t::M5_32_auxv_t(int32_t type, int32_t val) 207{ 208 a_type = TheISA::htog(type); 209 a_val = TheISA::htog(val); 210} 211 212M5_64_auxv_t::M5_64_auxv_t(int64_t type, int64_t val) 213{ 214 a_type = TheISA::htog(type); 215 a_val = TheISA::htog(val); 216} 217 218void 219Sparc64LiveProcess::argsInit(int intSize, int pageSize) 220{ 221 typedef M5_64_auxv_t auxv_t; 222 Process::startup(); 223 224 string filename; 225 if(argv.size() < 1) 226 filename = ""; 227 else 228 filename = argv[0]; 229 230 Addr alignmentMask = ~(intSize - 1); 231 232 // load object file into target memory 233 objFile->loadSections(initVirtMem); 234 235 enum hardwareCaps 236 { 237 M5_HWCAP_SPARC_FLUSH = 1, 238 M5_HWCAP_SPARC_STBAR = 2, 239 M5_HWCAP_SPARC_SWAP = 4, 240 M5_HWCAP_SPARC_MULDIV = 8, 241 M5_HWCAP_SPARC_V9 = 16, 242 //This one should technically only be set 243 //if there is a cheetah or cheetah_plus tlb, 244 //but we'll use it all the time 245 M5_HWCAP_SPARC_ULTRA3 = 32 246 }; 247 248 const int64_t hwcap = 249 M5_HWCAP_SPARC_FLUSH | 250 M5_HWCAP_SPARC_STBAR | 251 M5_HWCAP_SPARC_SWAP | 252 M5_HWCAP_SPARC_MULDIV | 253 M5_HWCAP_SPARC_V9 | 254 M5_HWCAP_SPARC_ULTRA3; 255 256 257 //Setup the auxilliary vectors. These will already have endian conversion. 258 //Auxilliary vectors are loaded only for elf formatted executables. 259 ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile); 260 if(elfObject) 261 { 262 //Bits which describe the system hardware capabilities 263 auxv.push_back(auxv_t(M5_AT_HWCAP, hwcap)); 264 //The system page size 265 auxv.push_back(auxv_t(M5_AT_PAGESZ, SparcISA::VMPageSize)); 266 //Defined to be 100 in the kernel source. 267 //Frequency at which times() increments 268 auxv.push_back(auxv_t(M5_AT_CLKTCK, 100)); 269 // For statically linked executables, this is the virtual address of the 270 // program header tables if they appear in the executable image 271 auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable())); 272 // This is the size of a program header entry from the elf file. 273 auxv.push_back(auxv_t(M5_AT_PHENT, elfObject->programHeaderSize())); 274 // This is the number of program headers from the original elf file. 275 auxv.push_back(auxv_t(M5_AT_PHNUM, elfObject->programHeaderCount())); 276 //This is the address of the elf "interpreter", It should be set 277 //to 0 for regular executables. It should be something else 278 //(not sure what) for dynamic libraries. 279 auxv.push_back(auxv_t(M5_AT_BASE, 0)); 280 //This is hardwired to 0 in the elf loading code in the kernel 281 auxv.push_back(auxv_t(M5_AT_FLAGS, 0)); 282 //The entry point to the program 283 auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint())); 284 //Different user and group IDs 285 auxv.push_back(auxv_t(M5_AT_UID, uid())); 286 auxv.push_back(auxv_t(M5_AT_EUID, euid())); 287 auxv.push_back(auxv_t(M5_AT_GID, gid())); 288 auxv.push_back(auxv_t(M5_AT_EGID, egid())); 289 //Whether to enable "secure mode" in the executable 290 auxv.push_back(auxv_t(M5_AT_SECURE, 0)); 291 } 292 293 //Figure out how big the initial stack needs to be 294 295 // The unaccounted for 0 at the top of the stack 296 int mysterious_size = intSize; 297 298 //This is the name of the file which is present on the initial stack 299 //It's purpose is to let the user space linker examine the original file. 300 int file_name_size = filename.size() + 1; 301 302 int env_data_size = 0; 303 for (int i = 0; i < envp.size(); ++i) { 304 env_data_size += envp[i].size() + 1; 305 } 306 int arg_data_size = 0; 307 for (int i = 0; i < argv.size(); ++i) { 308 arg_data_size += argv[i].size() + 1; 309 } 310 311 //The info_block needs to be padded so it's size is a multiple of the 312 //alignment mask. Also, it appears that there needs to be at least some 313 //padding, so if the size is already a multiple, we need to increase it 314 //anyway. 315 int info_block_size = 316 (file_name_size + 317 env_data_size + 318 arg_data_size + 319 intSize) & alignmentMask; 320 321 int info_block_padding = 322 info_block_size - 323 file_name_size - 324 env_data_size - 325 arg_data_size; 326 327 //Each auxilliary vector is two 8 byte words 328 int aux_array_size = intSize * 2 * (auxv.size() + 1); 329 330 int envp_array_size = intSize * (envp.size() + 1); 331 int argv_array_size = intSize * (argv.size() + 1); 332 333 int argc_size = intSize; 334 int window_save_size = intSize * 16; 335 336 int space_needed = 337 mysterious_size + 338 info_block_size + 339 aux_array_size + 340 envp_array_size + 341 argv_array_size + 342 argc_size + 343 window_save_size; 344 345 stack_min = stack_base - space_needed; 346 stack_min &= alignmentMask; 347 stack_size = stack_base - stack_min; 348 349 // map memory 350 pTable->allocate(roundDown(stack_min, pageSize), 351 roundUp(stack_size, pageSize)); 352 353 // map out initial stack contents 354 Addr mysterious_base = stack_base - mysterious_size; 355 Addr file_name_base = mysterious_base - file_name_size; 356 Addr env_data_base = file_name_base - env_data_size; 357 Addr arg_data_base = env_data_base - arg_data_size; 358 Addr auxv_array_base = arg_data_base - aux_array_size - info_block_padding; 359 Addr envp_array_base = auxv_array_base - envp_array_size; 360 Addr argv_array_base = envp_array_base - argv_array_size; 361 Addr argc_base = argv_array_base - argc_size; 362#ifndef NDEBUG 363 // only used in DPRINTF 364 Addr window_save_base = argc_base - window_save_size; 365#endif 366 367 DPRINTF(Sparc, "The addresses of items on the initial stack:\n"); 368 DPRINTF(Sparc, "0x%x - file name\n", file_name_base); 369 DPRINTF(Sparc, "0x%x - env data\n", env_data_base); 370 DPRINTF(Sparc, "0x%x - arg data\n", arg_data_base); 371 DPRINTF(Sparc, "0x%x - auxv array\n", auxv_array_base); 372 DPRINTF(Sparc, "0x%x - envp array\n", envp_array_base); 373 DPRINTF(Sparc, "0x%x - argv array\n", argv_array_base); 374 DPRINTF(Sparc, "0x%x - argc \n", argc_base); 375 DPRINTF(Sparc, "0x%x - window save\n", window_save_base); 376 DPRINTF(Sparc, "0x%x - stack min\n", stack_min); 377 378 // write contents to stack 379 380 // figure out argc 381 uint64_t argc = argv.size(); 382 uint64_t guestArgc = TheISA::htog(argc); 383 384 //Write out the mysterious 0 385 uint64_t mysterious_zero = 0; 386 initVirtMem->writeBlob(mysterious_base, 387 (uint8_t*)&mysterious_zero, mysterious_size); 388 389 //Write the file name 390 initVirtMem->writeString(file_name_base, filename.c_str()); 391 392 //Copy the aux stuff 393 for(int x = 0; x < auxv.size(); x++) 394 { 395 initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize, 396 (uint8_t*)&(auxv[x].a_type), intSize); 397 initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize, 398 (uint8_t*)&(auxv[x].a_val), intSize); 399 } 400 //Write out the terminating zeroed auxilliary vector 401 const uint64_t zero = 0; 402 initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(), 403 (uint8_t*)&zero, 2 * intSize); 404 405 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem); 406 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem); 407 408 initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize); 409 410 //Stuff the trap handlers into the processes address space. 411 //Since the stack grows down and is the highest area in the processes 412 //address space, we can put stuff above it and stay out of the way. 413 int fillSize = sizeof(MachInst) * numFillInsts; 414 int spillSize = sizeof(MachInst) * numSpillInsts; 415 fillStart = stack_base; 416 spillStart = fillStart + fillSize; 417 initVirtMem->writeBlob(fillStart, (uint8_t*)fillHandler64, fillSize); 418 initVirtMem->writeBlob(spillStart, (uint8_t*)spillHandler64, spillSize); 419 420 //Set up the thread context to start running the process 421 assert(NumArgumentRegs >= 2); 422 threadContexts[0]->setIntReg(ArgumentReg[0], argc); 423 threadContexts[0]->setIntReg(ArgumentReg[1], argv_array_base); 424 threadContexts[0]->setIntReg(StackPointerReg, stack_min - StackBias); 425 426 Addr prog_entry = objFile->entryPoint(); 427 threadContexts[0]->setPC(prog_entry); 428 threadContexts[0]->setNextPC(prog_entry + sizeof(MachInst)); 429 threadContexts[0]->setNextNPC(prog_entry + (2 * sizeof(MachInst))); 430 431 //Align the "stack_min" to a page boundary. 432 stack_min = roundDown(stack_min, pageSize); 433 434// num_processes++; 435} 436 437void 438Sparc32LiveProcess::argsInit(int intSize, int pageSize) 439{ 440 typedef M5_32_auxv_t auxv_t; 441 Process::startup(); 442 443 string filename; 444 if(argv.size() < 1) 445 filename = ""; 446 else 447 filename = argv[0]; 448 449 //Even though this is a 32 bit process, the ABI says we still need to 450 //maintain double word alignment of the stack pointer. 451 Addr alignmentMask = ~(8 - 1); 452 453 // load object file into target memory 454 objFile->loadSections(initVirtMem); 455 456 //These are the auxilliary vector types 457 enum auxTypes 458 { 459 SPARC_AT_HWCAP = 16, 460 SPARC_AT_PAGESZ = 6, 461 SPARC_AT_CLKTCK = 17, 462 SPARC_AT_PHDR = 3, 463 SPARC_AT_PHENT = 4, 464 SPARC_AT_PHNUM = 5, 465 SPARC_AT_BASE = 7, 466 SPARC_AT_FLAGS = 8, 467 SPARC_AT_ENTRY = 9, 468 SPARC_AT_UID = 11, 469 SPARC_AT_EUID = 12, 470 SPARC_AT_GID = 13, 471 SPARC_AT_EGID = 14, 472 SPARC_AT_SECURE = 23 473 }; 474 475 enum hardwareCaps 476 { 477 M5_HWCAP_SPARC_FLUSH = 1, 478 M5_HWCAP_SPARC_STBAR = 2, 479 M5_HWCAP_SPARC_SWAP = 4, 480 M5_HWCAP_SPARC_MULDIV = 8, 481 M5_HWCAP_SPARC_V9 = 16, 482 //This one should technically only be set 483 //if there is a cheetah or cheetah_plus tlb, 484 //but we'll use it all the time 485 M5_HWCAP_SPARC_ULTRA3 = 32 486 }; 487 488 const int64_t hwcap = 489 M5_HWCAP_SPARC_FLUSH | 490 M5_HWCAP_SPARC_STBAR | 491 M5_HWCAP_SPARC_SWAP | 492 M5_HWCAP_SPARC_MULDIV | 493 M5_HWCAP_SPARC_V9 | 494 M5_HWCAP_SPARC_ULTRA3; 495 496 497 //Setup the auxilliary vectors. These will already have endian conversion. 498 //Auxilliary vectors are loaded only for elf formatted executables. 499 ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile); 500 if(elfObject) 501 { 502 //Bits which describe the system hardware capabilities 503 auxv.push_back(auxv_t(SPARC_AT_HWCAP, hwcap)); 504 //The system page size 505 auxv.push_back(auxv_t(SPARC_AT_PAGESZ, SparcISA::VMPageSize)); 506 //Defined to be 100 in the kernel source. 507 //Frequency at which times() increments 508 auxv.push_back(auxv_t(SPARC_AT_CLKTCK, 100)); 509 // For statically linked executables, this is the virtual address of the 510 // program header tables if they appear in the executable image 511 auxv.push_back(auxv_t(SPARC_AT_PHDR, elfObject->programHeaderTable())); 512 // This is the size of a program header entry from the elf file. 513 auxv.push_back(auxv_t(SPARC_AT_PHENT, elfObject->programHeaderSize())); 514 // This is the number of program headers from the original elf file. 515 auxv.push_back(auxv_t(SPARC_AT_PHNUM, elfObject->programHeaderCount())); 516 //This is the address of the elf "interpreter", It should be set 517 //to 0 for regular executables. It should be something else 518 //(not sure what) for dynamic libraries. 519 auxv.push_back(auxv_t(SPARC_AT_BASE, 0)); 520 //This is hardwired to 0 in the elf loading code in the kernel 521 auxv.push_back(auxv_t(SPARC_AT_FLAGS, 0)); 522 //The entry point to the program 523 auxv.push_back(auxv_t(SPARC_AT_ENTRY, objFile->entryPoint())); 524 //Different user and group IDs 525 auxv.push_back(auxv_t(SPARC_AT_UID, uid())); 526 auxv.push_back(auxv_t(SPARC_AT_EUID, euid())); 527 auxv.push_back(auxv_t(SPARC_AT_GID, gid())); 528 auxv.push_back(auxv_t(SPARC_AT_EGID, egid())); 529 //Whether to enable "secure mode" in the executable 530 auxv.push_back(auxv_t(SPARC_AT_SECURE, 0)); 531 } 532 533 //Figure out how big the initial stack needs to be 534 535 // The unaccounted for 8 byte 0 at the top of the stack 536 int mysterious_size = 8; 537 538 //This is the name of the file which is present on the initial stack 539 //It's purpose is to let the user space linker examine the original file. 540 int file_name_size = filename.size() + 1; 541 542 int env_data_size = 0; 543 for (int i = 0; i < envp.size(); ++i) { 544 env_data_size += envp[i].size() + 1; 545 } 546 int arg_data_size = 0; 547 for (int i = 0; i < argv.size(); ++i) { 548 arg_data_size += argv[i].size() + 1; 549 } 550 551 //The info_block - This seems to need an pad for some reason. 552 int info_block_size = 553 (mysterious_size + 554 file_name_size + 555 env_data_size + 556 arg_data_size + intSize); 557 558 //Each auxilliary vector is two 4 byte words 559 int aux_array_size = intSize * 2 * (auxv.size() + 1); 560 561 int envp_array_size = intSize * (envp.size() + 1); 562 int argv_array_size = intSize * (argv.size() + 1); 563 564 int argc_size = intSize; 565 int window_save_size = intSize * 16; 566 567 int space_needed = 568 info_block_size + 569 aux_array_size + 570 envp_array_size + 571 argv_array_size + 572 argc_size + 573 window_save_size; 574 575 stack_min = stack_base - space_needed; 576 stack_min &= alignmentMask; 577 stack_size = stack_base - stack_min; 578 579 // map memory 580 pTable->allocate(roundDown(stack_min, pageSize), 581 roundUp(stack_size, pageSize)); 582 583 // map out initial stack contents 584 uint32_t window_save_base = stack_min; 585 uint32_t argc_base = window_save_base + window_save_size; 586 uint32_t argv_array_base = argc_base + argc_size; 587 uint32_t envp_array_base = argv_array_base + argv_array_size; 588 uint32_t auxv_array_base = envp_array_base + envp_array_size; 589 //The info block is pushed up against the top of the stack, while 590 //the rest of the initial stack frame is aligned to an 8 byte boudary. 591 uint32_t arg_data_base = stack_base - info_block_size + intSize; 592 uint32_t env_data_base = arg_data_base + arg_data_size; 593 uint32_t file_name_base = env_data_base + env_data_size; 594 uint32_t mysterious_base = file_name_base + file_name_size; 595 596 DPRINTF(Sparc, "The addresses of items on the initial stack:\n"); 597 DPRINTF(Sparc, "0x%x - file name\n", file_name_base); 598 DPRINTF(Sparc, "0x%x - env data\n", env_data_base); 599 DPRINTF(Sparc, "0x%x - arg data\n", arg_data_base); 600 DPRINTF(Sparc, "0x%x - auxv array\n", auxv_array_base); 601 DPRINTF(Sparc, "0x%x - envp array\n", envp_array_base); 602 DPRINTF(Sparc, "0x%x - argv array\n", argv_array_base); 603 DPRINTF(Sparc, "0x%x - argc \n", argc_base); 604 DPRINTF(Sparc, "0x%x - window save\n", window_save_base); 605 DPRINTF(Sparc, "0x%x - stack min\n", stack_min); 606 607 // write contents to stack 608 609 // figure out argc 610 uint32_t argc = argv.size(); 611 uint32_t guestArgc = TheISA::htog(argc); 612 613 //Write out the mysterious 0 614 uint64_t mysterious_zero = 0; 615 initVirtMem->writeBlob(mysterious_base, 616 (uint8_t*)&mysterious_zero, mysterious_size); 617 618 //Write the file name 619 initVirtMem->writeString(file_name_base, filename.c_str()); 620 621 //Copy the aux stuff 622 for(int x = 0; x < auxv.size(); x++) 623 { 624 initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize, 625 (uint8_t*)&(auxv[x].a_type), intSize); 626 initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize, 627 (uint8_t*)&(auxv[x].a_val), intSize); 628 } 629 //Write out the terminating zeroed auxilliary vector 630 const uint64_t zero = 0; 631 initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(), 632 (uint8_t*)&zero, 2 * intSize); 633 634 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem); 635 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem); 636 637 initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize); 638 639 //Stuff the trap handlers into the processes address space. 640 //Since the stack grows down and is the highest area in the processes 641 //address space, we can put stuff above it and stay out of the way. 642 int fillSize = sizeof(MachInst) * numFillInsts; 643 int spillSize = sizeof(MachInst) * numSpillInsts; 644 fillStart = stack_base; 645 spillStart = fillStart + fillSize; 646 initVirtMem->writeBlob(fillStart, (uint8_t*)fillHandler32, fillSize); 647 initVirtMem->writeBlob(spillStart, (uint8_t*)spillHandler32, spillSize); 648 649 //Set up the thread context to start running the process 650 //assert(NumArgumentRegs >= 2); 651 //threadContexts[0]->setIntReg(ArgumentReg[0], argc); 652 //threadContexts[0]->setIntReg(ArgumentReg[1], argv_array_base); 653 threadContexts[0]->setIntReg(StackPointerReg, stack_min); 654 655 uint32_t prog_entry = objFile->entryPoint(); 656 threadContexts[0]->setPC(prog_entry); 657 threadContexts[0]->setNextPC(prog_entry + sizeof(MachInst)); 658 threadContexts[0]->setNextNPC(prog_entry + (2 * sizeof(MachInst))); 659 660 //Align the "stack_min" to a page boundary. 661 stack_min = roundDown(stack_min, pageSize); 662 663// num_processes++; 664} 665 666void Sparc32LiveProcess::flushWindows(ThreadContext *tc) 667{ 668 IntReg Cansave = tc->readIntReg(NumIntArchRegs + 3); 669 IntReg Canrestore = tc->readIntReg(NumIntArchRegs + 4); 670 IntReg Otherwin = tc->readIntReg(NumIntArchRegs + 6); 671 MiscReg CWP = tc->readMiscReg(MISCREG_CWP); 672 MiscReg origCWP = CWP; 673 CWP = (CWP + Cansave + 2) % NWindows; 674 while(NWindows - 2 - Cansave != 0) 675 { 676 if (Otherwin) { 677 panic("Otherwin non-zero.\n"); 678 } else { 679 tc->setMiscReg(MISCREG_CWP, CWP); 680 //Do the stores 681 IntReg sp = tc->readIntReg(StackPointerReg); 682 for (int index = 16; index < 32; index++) { 683 IntReg regVal = tc->readIntReg(index); 684 regVal = htog(regVal); 685 if (!tc->getMemPort()->tryWriteBlob( 686 sp + (index - 16) * 4, (uint8_t *)®Val, 4)) { 687 warn("Failed to save register to the stack when " 688 "flushing windows.\n"); 689 } 690 } 691 Canrestore--; 692 Cansave++; 693 CWP = (CWP + 1) % NWindows; 694 } 695 } 696 tc->setIntReg(NumIntArchRegs + 3, Cansave); 697 tc->setIntReg(NumIntArchRegs + 4, Canrestore); 698 tc->setMiscReg(MISCREG_CWP, origCWP); 699} 700 701void Sparc64LiveProcess::flushWindows(ThreadContext *tc) 702{ 703 IntReg Cansave = tc->readIntReg(NumIntArchRegs + 3); 704 IntReg Canrestore = tc->readIntReg(NumIntArchRegs + 4); 705 IntReg Otherwin = tc->readIntReg(NumIntArchRegs + 6); 706 MiscReg CWP = tc->readMiscReg(MISCREG_CWP); 707 MiscReg origCWP = CWP; 708 CWP = (CWP + Cansave + 2) % NWindows; 709 while(NWindows - 2 - Cansave != 0) 710 { 711 if (Otherwin) { 712 panic("Otherwin non-zero.\n"); 713 } else { 714 tc->setMiscReg(MISCREG_CWP, CWP); 715 //Do the stores 716 IntReg sp = tc->readIntReg(StackPointerReg); 717 for (int index = 16; index < 32; index++) { 718 IntReg regVal = tc->readIntReg(index); 719 regVal = htog(regVal); 720 if (!tc->getMemPort()->tryWriteBlob( 721 sp + 2047 + (index - 16) * 8, (uint8_t *)®Val, 8)) { 722 warn("Failed to save register to the stack when " 723 "flushing windows.\n"); 724 } 725 } 726 Canrestore--; 727 Cansave++; 728 CWP = (CWP + 1) % NWindows; 729 } 730 } 731 tc->setIntReg(NumIntArchRegs + 3, Cansave); 732 tc->setIntReg(NumIntArchRegs + 4, Canrestore); 733 tc->setMiscReg(MISCREG_CWP, origCWP); 734} 735