process.cc revision 4434
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(const std::string &nm, ObjectFile *objFile, 51 System *_system, int stdin_fd, int stdout_fd, int stderr_fd, 52 std::vector<std::string> &argv, std::vector<std::string> &envp, 53 const std::string &cwd, 54 uint64_t _uid, uint64_t _euid, uint64_t _gid, uint64_t _egid, 55 uint64_t _pid, uint64_t _ppid) 56 : LiveProcess(nm, objFile, _system, stdin_fd, stdout_fd, stderr_fd, 57 argv, envp, cwd, _uid, _euid, _gid, _egid, _pid, _ppid) 58{ 59 60 // XXX all the below need to be updated for SPARC - Ali 61 brk_point = objFile->dataBase() + objFile->dataSize() + objFile->bssSize(); 62 brk_point = roundUp(brk_point, VMPageSize); 63 64 // Set pointer for next thread stack. Reserve 8M for main stack. 65 next_thread_stack_base = stack_base - (8 * 1024 * 1024); 66 67 //Initialize these to 0s 68 fillStart = 0; 69 spillStart = 0; 70} 71 72void SparcLiveProcess::handleTrap(int trapNum, ThreadContext *tc) 73{ 74 switch(trapNum) 75 { 76 case 0x03: //Flush window trap 77 warn("Ignoring request to flush register windows.\n"); 78 break; 79 default: 80 panic("Unimplemented trap to operating system: trap number %#x.\n", trapNum); 81 } 82} 83 84void 85Sparc32LiveProcess::startup() 86{ 87 argsInit(32 / 8, VMPageSize); 88 89 //From the SPARC ABI 90 91 //The process runs in user mode 92 threadContexts[0]->setMiscReg(MISCREG_PSTATE, 0x02); 93 94 //Setup default FP state 95 threadContexts[0]->setMiscRegNoEffect(MISCREG_FSR, 0); 96 97 threadContexts[0]->setMiscRegNoEffect(MISCREG_TICK, 0); 98 // 99 /* 100 * Register window management registers 101 */ 102 103 //No windows contain info from other programs 104 //threadContexts[0]->setMiscRegNoEffect(MISCREG_OTHERWIN, 0); 105 threadContexts[0]->setIntReg(NumIntArchRegs + 6, 0); 106 //There are no windows to pop 107 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANRESTORE, 0); 108 threadContexts[0]->setIntReg(NumIntArchRegs + 4, 0); 109 //All windows are available to save into 110 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANSAVE, NWindows - 2); 111 threadContexts[0]->setIntReg(NumIntArchRegs + 3, NWindows - 2); 112 //All windows are "clean" 113 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CLEANWIN, NWindows); 114 threadContexts[0]->setIntReg(NumIntArchRegs + 5, NWindows); 115 //Start with register window 0 116 threadContexts[0]->setMiscRegNoEffect(MISCREG_CWP, 0); 117 //Always use spill and fill traps 0 118 //threadContexts[0]->setMiscRegNoEffect(MISCREG_WSTATE, 0); 119 threadContexts[0]->setIntReg(NumIntArchRegs + 7, 0); 120 //Set the trap level to 0 121 threadContexts[0]->setMiscRegNoEffect(MISCREG_TL, 0); 122 //Set the ASI register to something fixed 123 threadContexts[0]->setMiscRegNoEffect(MISCREG_ASI, ASI_PRIMARY); 124} 125 126void 127Sparc64LiveProcess::startup() 128{ 129 argsInit(sizeof(IntReg), VMPageSize); 130 131 //From the SPARC ABI 132 133 //The process runs in user mode 134 threadContexts[0]->setMiscReg(MISCREG_PSTATE, 0x02); 135 136 //Setup default FP state 137 threadContexts[0]->setMiscRegNoEffect(MISCREG_FSR, 0); 138 139 threadContexts[0]->setMiscRegNoEffect(MISCREG_TICK, 0); 140 // 141 /* 142 * Register window management registers 143 */ 144 145 //No windows contain info from other programs 146 //threadContexts[0]->setMiscRegNoEffect(MISCREG_OTHERWIN, 0); 147 threadContexts[0]->setIntReg(NumIntArchRegs + 6, 0); 148 //There are no windows to pop 149 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANRESTORE, 0); 150 threadContexts[0]->setIntReg(NumIntArchRegs + 4, 0); 151 //All windows are available to save into 152 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANSAVE, NWindows - 2); 153 threadContexts[0]->setIntReg(NumIntArchRegs + 3, NWindows - 2); 154 //All windows are "clean" 155 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CLEANWIN, NWindows); 156 threadContexts[0]->setIntReg(NumIntArchRegs + 5, NWindows); 157 //Start with register window 0 158 threadContexts[0]->setMiscRegNoEffect(MISCREG_CWP, 0); 159 //Always use spill and fill traps 0 160 //threadContexts[0]->setMiscRegNoEffect(MISCREG_WSTATE, 0); 161 threadContexts[0]->setIntReg(NumIntArchRegs + 7, 0); 162 //Set the trap level to 0 163 threadContexts[0]->setMiscRegNoEffect(MISCREG_TL, 0); 164 //Set the ASI register to something fixed 165 threadContexts[0]->setMiscRegNoEffect(MISCREG_ASI, ASI_PRIMARY); 166} 167 168M5_32_auxv_t::M5_32_auxv_t(int32_t type, int32_t val) 169{ 170 a_type = TheISA::htog(type); 171 a_val = TheISA::htog(val); 172} 173 174M5_64_auxv_t::M5_64_auxv_t(int64_t type, int64_t val) 175{ 176 a_type = TheISA::htog(type); 177 a_val = TheISA::htog(val); 178} 179 180void 181Sparc64LiveProcess::argsInit(int intSize, int pageSize) 182{ 183 typedef M5_64_auxv_t auxv_t; 184 Process::startup(); 185 186 string filename; 187 if(argv.size() < 1) 188 filename = ""; 189 else 190 filename = argv[0]; 191 192 Addr alignmentMask = ~(intSize - 1); 193 194 // load object file into target memory 195 objFile->loadSections(initVirtMem); 196 197 //These are the auxilliary vector types 198 enum auxTypes 199 { 200 SPARC_AT_HWCAP = 16, 201 SPARC_AT_PAGESZ = 6, 202 SPARC_AT_CLKTCK = 17, 203 SPARC_AT_PHDR = 3, 204 SPARC_AT_PHENT = 4, 205 SPARC_AT_PHNUM = 5, 206 SPARC_AT_BASE = 7, 207 SPARC_AT_FLAGS = 8, 208 SPARC_AT_ENTRY = 9, 209 SPARC_AT_UID = 11, 210 SPARC_AT_EUID = 12, 211 SPARC_AT_GID = 13, 212 SPARC_AT_EGID = 14, 213 SPARC_AT_SECURE = 23 214 }; 215 216 enum hardwareCaps 217 { 218 M5_HWCAP_SPARC_FLUSH = 1, 219 M5_HWCAP_SPARC_STBAR = 2, 220 M5_HWCAP_SPARC_SWAP = 4, 221 M5_HWCAP_SPARC_MULDIV = 8, 222 M5_HWCAP_SPARC_V9 = 16, 223 //This one should technically only be set 224 //if there is a cheetah or cheetah_plus tlb, 225 //but we'll use it all the time 226 M5_HWCAP_SPARC_ULTRA3 = 32 227 }; 228 229 const int64_t hwcap = 230 M5_HWCAP_SPARC_FLUSH | 231 M5_HWCAP_SPARC_STBAR | 232 M5_HWCAP_SPARC_SWAP | 233 M5_HWCAP_SPARC_MULDIV | 234 M5_HWCAP_SPARC_V9 | 235 M5_HWCAP_SPARC_ULTRA3; 236 237 238 //Setup the auxilliary vectors. These will already have endian conversion. 239 //Auxilliary vectors are loaded only for elf formatted executables. 240 ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile); 241 if(elfObject) 242 { 243 //Bits which describe the system hardware capabilities 244 auxv.push_back(auxv_t(SPARC_AT_HWCAP, hwcap)); 245 //The system page size 246 auxv.push_back(auxv_t(SPARC_AT_PAGESZ, SparcISA::VMPageSize)); 247 //Defined to be 100 in the kernel source. 248 //Frequency at which times() increments 249 auxv.push_back(auxv_t(SPARC_AT_CLKTCK, 100)); 250 // For statically linked executables, this is the virtual address of the 251 // program header tables if they appear in the executable image 252 auxv.push_back(auxv_t(SPARC_AT_PHDR, elfObject->programHeaderTable())); 253 // This is the size of a program header entry from the elf file. 254 auxv.push_back(auxv_t(SPARC_AT_PHENT, elfObject->programHeaderSize())); 255 // This is the number of program headers from the original elf file. 256 auxv.push_back(auxv_t(SPARC_AT_PHNUM, elfObject->programHeaderCount())); 257 //This is the address of the elf "interpreter", It should be set 258 //to 0 for regular executables. It should be something else 259 //(not sure what) for dynamic libraries. 260 auxv.push_back(auxv_t(SPARC_AT_BASE, 0)); 261 //This is hardwired to 0 in the elf loading code in the kernel 262 auxv.push_back(auxv_t(SPARC_AT_FLAGS, 0)); 263 //The entry point to the program 264 auxv.push_back(auxv_t(SPARC_AT_ENTRY, objFile->entryPoint())); 265 //Different user and group IDs 266 auxv.push_back(auxv_t(SPARC_AT_UID, uid())); 267 auxv.push_back(auxv_t(SPARC_AT_EUID, euid())); 268 auxv.push_back(auxv_t(SPARC_AT_GID, gid())); 269 auxv.push_back(auxv_t(SPARC_AT_EGID, egid())); 270 //Whether to enable "secure mode" in the executable 271 auxv.push_back(auxv_t(SPARC_AT_SECURE, 0)); 272 } 273 274 //Figure out how big the initial stack needs to be 275 276 // The unaccounted for 0 at the top of the stack 277 int mysterious_size = intSize; 278 279 //This is the name of the file which is present on the initial stack 280 //It's purpose is to let the user space linker examine the original file. 281 int file_name_size = filename.size() + 1; 282 283 int env_data_size = 0; 284 for (int i = 0; i < envp.size(); ++i) { 285 env_data_size += envp[i].size() + 1; 286 } 287 int arg_data_size = 0; 288 for (int i = 0; i < argv.size(); ++i) { 289 arg_data_size += argv[i].size() + 1; 290 } 291 292 //The info_block needs to be padded so it's size is a multiple of the 293 //alignment mask. Also, it appears that there needs to be at least some 294 //padding, so if the size is already a multiple, we need to increase it 295 //anyway. 296 int info_block_size = 297 (file_name_size + 298 env_data_size + 299 arg_data_size + 300 intSize) & alignmentMask; 301 302 int info_block_padding = 303 info_block_size - 304 file_name_size - 305 env_data_size - 306 arg_data_size; 307 308 //Each auxilliary vector is two 8 byte words 309 int aux_array_size = intSize * 2 * (auxv.size() + 1); 310 311 int envp_array_size = intSize * (envp.size() + 1); 312 int argv_array_size = intSize * (argv.size() + 1); 313 314 int argc_size = intSize; 315 int window_save_size = intSize * 16; 316 317 int space_needed = 318 mysterious_size + 319 info_block_size + 320 aux_array_size + 321 envp_array_size + 322 argv_array_size + 323 argc_size + 324 window_save_size; 325 326 stack_min = stack_base - space_needed; 327 stack_min &= alignmentMask; 328 stack_size = stack_base - stack_min; 329 330 // map memory 331 pTable->allocate(roundDown(stack_min, pageSize), 332 roundUp(stack_size, pageSize)); 333 334 // map out initial stack contents 335 Addr mysterious_base = stack_base - mysterious_size; 336 Addr file_name_base = mysterious_base - file_name_size; 337 Addr env_data_base = file_name_base - env_data_size; 338 Addr arg_data_base = env_data_base - arg_data_size; 339 Addr auxv_array_base = arg_data_base - aux_array_size - info_block_padding; 340 Addr envp_array_base = auxv_array_base - envp_array_size; 341 Addr argv_array_base = envp_array_base - argv_array_size; 342 Addr argc_base = argv_array_base - argc_size; 343#ifndef NDEBUG 344 // only used in DPRINTF 345 Addr window_save_base = argc_base - window_save_size; 346#endif 347 348 DPRINTF(Sparc, "The addresses of items on the initial stack:\n"); 349 DPRINTF(Sparc, "0x%x - file name\n", file_name_base); 350 DPRINTF(Sparc, "0x%x - env data\n", env_data_base); 351 DPRINTF(Sparc, "0x%x - arg data\n", arg_data_base); 352 DPRINTF(Sparc, "0x%x - auxv array\n", auxv_array_base); 353 DPRINTF(Sparc, "0x%x - envp array\n", envp_array_base); 354 DPRINTF(Sparc, "0x%x - argv array\n", argv_array_base); 355 DPRINTF(Sparc, "0x%x - argc \n", argc_base); 356 DPRINTF(Sparc, "0x%x - window save\n", window_save_base); 357 DPRINTF(Sparc, "0x%x - stack min\n", stack_min); 358 359 // write contents to stack 360 361 // figure out argc 362 uint64_t argc = argv.size(); 363 uint64_t guestArgc = TheISA::htog(argc); 364 365 //Write out the mysterious 0 366 uint64_t mysterious_zero = 0; 367 initVirtMem->writeBlob(mysterious_base, 368 (uint8_t*)&mysterious_zero, mysterious_size); 369 370 //Write the file name 371 initVirtMem->writeString(file_name_base, filename.c_str()); 372 373 //Copy the aux stuff 374 for(int x = 0; x < auxv.size(); x++) 375 { 376 initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize, 377 (uint8_t*)&(auxv[x].a_type), intSize); 378 initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize, 379 (uint8_t*)&(auxv[x].a_val), intSize); 380 } 381 //Write out the terminating zeroed auxilliary vector 382 const uint64_t zero = 0; 383 initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(), 384 (uint8_t*)&zero, 2 * intSize); 385 386 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem); 387 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem); 388 389 initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize); 390 391 //Stuff the trap handlers into the processes address space. 392 //Since the stack grows down and is the highest area in the processes 393 //address space, we can put stuff above it and stay out of the way. 394 int fillSize = sizeof(MachInst) * numFillInsts; 395 int spillSize = sizeof(MachInst) * numSpillInsts; 396 fillStart = stack_base; 397 spillStart = fillStart + fillSize; 398 initVirtMem->writeBlob(fillStart, (uint8_t*)fillHandler64, fillSize); 399 initVirtMem->writeBlob(spillStart, (uint8_t*)spillHandler64, spillSize); 400 401 //Set up the thread context to start running the process 402 threadContexts[0]->setIntReg(ArgumentReg0, argc); 403 threadContexts[0]->setIntReg(ArgumentReg1, argv_array_base); 404 threadContexts[0]->setIntReg(StackPointerReg, stack_min - StackBias); 405 406 Addr prog_entry = objFile->entryPoint(); 407 threadContexts[0]->setPC(prog_entry); 408 threadContexts[0]->setNextPC(prog_entry + sizeof(MachInst)); 409 threadContexts[0]->setNextNPC(prog_entry + (2 * sizeof(MachInst))); 410 411 //Align the "stack_min" to a page boundary. 412 stack_min = roundDown(stack_min, pageSize); 413 414// num_processes++; 415} 416 417void 418Sparc32LiveProcess::argsInit(int intSize, int pageSize) 419{ 420 typedef M5_32_auxv_t auxv_t; 421 Process::startup(); 422 423 string filename; 424 if(argv.size() < 1) 425 filename = ""; 426 else 427 filename = argv[0]; 428 429 //Even though this is a 32 bit process, the ABI says we still need to 430 //maintain double word alignment of the stack pointer. 431 Addr alignmentMask = ~(8 - 1); 432 433 // load object file into target memory 434 objFile->loadSections(initVirtMem); 435 436 //These are the auxilliary vector types 437 enum auxTypes 438 { 439 SPARC_AT_HWCAP = 16, 440 SPARC_AT_PAGESZ = 6, 441 SPARC_AT_CLKTCK = 17, 442 SPARC_AT_PHDR = 3, 443 SPARC_AT_PHENT = 4, 444 SPARC_AT_PHNUM = 5, 445 SPARC_AT_BASE = 7, 446 SPARC_AT_FLAGS = 8, 447 SPARC_AT_ENTRY = 9, 448 SPARC_AT_UID = 11, 449 SPARC_AT_EUID = 12, 450 SPARC_AT_GID = 13, 451 SPARC_AT_EGID = 14, 452 SPARC_AT_SECURE = 23 453 }; 454 455 enum hardwareCaps 456 { 457 M5_HWCAP_SPARC_FLUSH = 1, 458 M5_HWCAP_SPARC_STBAR = 2, 459 M5_HWCAP_SPARC_SWAP = 4, 460 M5_HWCAP_SPARC_MULDIV = 8, 461 M5_HWCAP_SPARC_V9 = 16, 462 //This one should technically only be set 463 //if there is a cheetah or cheetah_plus tlb, 464 //but we'll use it all the time 465 M5_HWCAP_SPARC_ULTRA3 = 32 466 }; 467 468 const int64_t hwcap = 469 M5_HWCAP_SPARC_FLUSH | 470 M5_HWCAP_SPARC_STBAR | 471 M5_HWCAP_SPARC_SWAP | 472 M5_HWCAP_SPARC_MULDIV | 473 M5_HWCAP_SPARC_V9 | 474 M5_HWCAP_SPARC_ULTRA3; 475 476 477 //Setup the auxilliary vectors. These will already have endian conversion. 478 //Auxilliary vectors are loaded only for elf formatted executables. 479 ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile); 480 if(elfObject) 481 { 482 //Bits which describe the system hardware capabilities 483 auxv.push_back(auxv_t(SPARC_AT_HWCAP, hwcap)); 484 //The system page size 485 auxv.push_back(auxv_t(SPARC_AT_PAGESZ, SparcISA::VMPageSize)); 486 //Defined to be 100 in the kernel source. 487 //Frequency at which times() increments 488 auxv.push_back(auxv_t(SPARC_AT_CLKTCK, 100)); 489 // For statically linked executables, this is the virtual address of the 490 // program header tables if they appear in the executable image 491 auxv.push_back(auxv_t(SPARC_AT_PHDR, elfObject->programHeaderTable())); 492 // This is the size of a program header entry from the elf file. 493 auxv.push_back(auxv_t(SPARC_AT_PHENT, elfObject->programHeaderSize())); 494 // This is the number of program headers from the original elf file. 495 auxv.push_back(auxv_t(SPARC_AT_PHNUM, elfObject->programHeaderCount())); 496 //This is the address of the elf "interpreter", It should be set 497 //to 0 for regular executables. It should be something else 498 //(not sure what) for dynamic libraries. 499 auxv.push_back(auxv_t(SPARC_AT_BASE, 0)); 500 //This is hardwired to 0 in the elf loading code in the kernel 501 auxv.push_back(auxv_t(SPARC_AT_FLAGS, 0)); 502 //The entry point to the program 503 auxv.push_back(auxv_t(SPARC_AT_ENTRY, objFile->entryPoint())); 504 //Different user and group IDs 505 auxv.push_back(auxv_t(SPARC_AT_UID, uid())); 506 auxv.push_back(auxv_t(SPARC_AT_EUID, euid())); 507 auxv.push_back(auxv_t(SPARC_AT_GID, gid())); 508 auxv.push_back(auxv_t(SPARC_AT_EGID, egid())); 509 //Whether to enable "secure mode" in the executable 510 auxv.push_back(auxv_t(SPARC_AT_SECURE, 0)); 511 } 512 513 //Figure out how big the initial stack needs to be 514 515 // The unaccounted for 8 byte 0 at the top of the stack 516 int mysterious_size = 8; 517 518 //This is the name of the file which is present on the initial stack 519 //It's purpose is to let the user space linker examine the original file. 520 int file_name_size = filename.size() + 1; 521 522 int env_data_size = 0; 523 for (int i = 0; i < envp.size(); ++i) { 524 env_data_size += envp[i].size() + 1; 525 } 526 int arg_data_size = 0; 527 for (int i = 0; i < argv.size(); ++i) { 528 arg_data_size += argv[i].size() + 1; 529 } 530 531 //The info_block - This seems to need an pad for some reason. 532 int info_block_size = 533 (mysterious_size + 534 file_name_size + 535 env_data_size + 536 arg_data_size + intSize); 537 538 //Each auxilliary vector is two 4 byte words 539 int aux_array_size = intSize * 2 * (auxv.size() + 1); 540 541 int envp_array_size = intSize * (envp.size() + 1); 542 int argv_array_size = intSize * (argv.size() + 1); 543 544 int argc_size = intSize; 545 int window_save_size = intSize * 16; 546 547 int space_needed = 548 info_block_size + 549 aux_array_size + 550 envp_array_size + 551 argv_array_size + 552 argc_size + 553 window_save_size; 554 555 stack_min = stack_base - space_needed; 556 stack_min &= alignmentMask; 557 stack_size = stack_base - stack_min; 558 559 // map memory 560 pTable->allocate(roundDown(stack_min, pageSize), 561 roundUp(stack_size, pageSize)); 562 563 // map out initial stack contents 564 uint32_t window_save_base = stack_min; 565 uint32_t argc_base = window_save_base + window_save_size; 566 uint32_t argv_array_base = argc_base + argc_size; 567 uint32_t envp_array_base = argv_array_base + argv_array_size; 568 uint32_t auxv_array_base = envp_array_base + envp_array_size; 569 //The info block is pushed up against the top of the stack, while 570 //the rest of the initial stack frame is aligned to an 8 byte boudary. 571 uint32_t arg_data_base = stack_base - info_block_size + intSize; 572 uint32_t env_data_base = arg_data_base + arg_data_size; 573 uint32_t file_name_base = env_data_base + env_data_size; 574 uint32_t mysterious_base = file_name_base + file_name_size; 575 576 DPRINTF(Sparc, "The addresses of items on the initial stack:\n"); 577 DPRINTF(Sparc, "0x%x - file name\n", file_name_base); 578 DPRINTF(Sparc, "0x%x - env data\n", env_data_base); 579 DPRINTF(Sparc, "0x%x - arg data\n", arg_data_base); 580 DPRINTF(Sparc, "0x%x - auxv array\n", auxv_array_base); 581 DPRINTF(Sparc, "0x%x - envp array\n", envp_array_base); 582 DPRINTF(Sparc, "0x%x - argv array\n", argv_array_base); 583 DPRINTF(Sparc, "0x%x - argc \n", argc_base); 584 DPRINTF(Sparc, "0x%x - window save\n", window_save_base); 585 DPRINTF(Sparc, "0x%x - stack min\n", stack_min); 586 587 // write contents to stack 588 589 // figure out argc 590 uint32_t argc = argv.size(); 591 uint32_t guestArgc = TheISA::htog(argc); 592 593 //Write out the mysterious 0 594 uint64_t mysterious_zero = 0; 595 initVirtMem->writeBlob(mysterious_base, 596 (uint8_t*)&mysterious_zero, mysterious_size); 597 598 //Write the file name 599 initVirtMem->writeString(file_name_base, filename.c_str()); 600 601 //Copy the aux stuff 602 for(int x = 0; x < auxv.size(); x++) 603 { 604 initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize, 605 (uint8_t*)&(auxv[x].a_type), intSize); 606 initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize, 607 (uint8_t*)&(auxv[x].a_val), intSize); 608 } 609 //Write out the terminating zeroed auxilliary vector 610 const uint64_t zero = 0; 611 initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(), 612 (uint8_t*)&zero, 2 * intSize); 613 614 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem); 615 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem); 616 617 initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize); 618 619 //Stuff the trap handlers into the processes address space. 620 //Since the stack grows down and is the highest area in the processes 621 //address space, we can put stuff above it and stay out of the way. 622 int fillSize = sizeof(MachInst) * numFillInsts; 623 int spillSize = sizeof(MachInst) * numSpillInsts; 624 fillStart = stack_base; 625 spillStart = fillStart + fillSize; 626 initVirtMem->writeBlob(fillStart, (uint8_t*)fillHandler32, fillSize); 627 initVirtMem->writeBlob(spillStart, (uint8_t*)spillHandler32, spillSize); 628 629 //Set up the thread context to start running the process 630 //threadContexts[0]->setIntReg(ArgumentReg0, argc); 631 //threadContexts[0]->setIntReg(ArgumentReg1, argv_array_base); 632 threadContexts[0]->setIntReg(StackPointerReg, stack_min); 633 634 uint32_t prog_entry = objFile->entryPoint(); 635 threadContexts[0]->setPC(prog_entry); 636 threadContexts[0]->setNextPC(prog_entry + sizeof(MachInst)); 637 threadContexts[0]->setNextNPC(prog_entry + (2 * sizeof(MachInst))); 638 639 //Align the "stack_min" to a page boundary. 640 stack_min = roundDown(stack_min, pageSize); 641 642// num_processes++; 643} 644