process.cc revision 4164
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 "mem/translating_port.hh" 43#include "sim/system.hh" 44 45using namespace std; 46using namespace SparcISA; 47 48 49SparcLiveProcess::SparcLiveProcess(const std::string &nm, ObjectFile *objFile, 50 System *_system, int stdin_fd, int stdout_fd, int stderr_fd, 51 std::vector<std::string> &argv, std::vector<std::string> &envp, 52 const std::string &cwd, 53 uint64_t _uid, uint64_t _euid, uint64_t _gid, uint64_t _egid, 54 uint64_t _pid, uint64_t _ppid) 55 : LiveProcess(nm, objFile, _system, stdin_fd, stdout_fd, stderr_fd, 56 argv, envp, cwd, _uid, _euid, _gid, _egid, _pid, _ppid) 57{ 58 59 // XXX all the below need to be updated for SPARC - Ali 60 brk_point = objFile->dataBase() + objFile->dataSize() + objFile->bssSize(); 61 brk_point = roundUp(brk_point, VMPageSize); 62 63 // Set pointer for next thread stack. Reserve 8M for main stack. 64 next_thread_stack_base = stack_base - (8 * 1024 * 1024); 65 66 //Initialize these to 0s 67 fillStart = 0; 68 spillStart = 0; 69} 70 71void SparcLiveProcess::handleTrap(int trapNum, ThreadContext *tc) 72{ 73 switch(trapNum) 74 { 75 case 0x03: //Flush window trap 76 warn("Ignoring request to flush register windows.\n"); 77 break; 78 default: 79 panic("Unimplemented trap to operating system: trap number %#x.\n", trapNum); 80 } 81} 82 83void 84Sparc32LiveProcess::startup() 85{ 86 argsInit(32 / 8, VMPageSize); 87 88 //From the SPARC ABI 89 90 //The process runs in user mode 91 threadContexts[0]->setMiscRegWithEffect(MISCREG_PSTATE, 0x02); 92 93 //Setup default FP state 94 threadContexts[0]->setMiscReg(MISCREG_FSR, 0); 95 96 threadContexts[0]->setMiscReg(MISCREG_TICK, 0); 97 // 98 /* 99 * Register window management registers 100 */ 101 102 //No windows contain info from other programs 103 //threadContexts[0]->setMiscReg(MISCREG_OTHERWIN, 0); 104 threadContexts[0]->setIntReg(NumIntArchRegs + 6, 0); 105 //There are no windows to pop 106 //threadContexts[0]->setMiscReg(MISCREG_CANRESTORE, 0); 107 threadContexts[0]->setIntReg(NumIntArchRegs + 4, 0); 108 //All windows are available to save into 109 //threadContexts[0]->setMiscReg(MISCREG_CANSAVE, NWindows - 2); 110 threadContexts[0]->setIntReg(NumIntArchRegs + 3, NWindows - 2); 111 //All windows are "clean" 112 //threadContexts[0]->setMiscReg(MISCREG_CLEANWIN, NWindows); 113 threadContexts[0]->setIntReg(NumIntArchRegs + 5, NWindows); 114 //Start with register window 0 115 threadContexts[0]->setMiscReg(MISCREG_CWP, 0); 116 //Always use spill and fill traps 0 117 //threadContexts[0]->setMiscReg(MISCREG_WSTATE, 0); 118 threadContexts[0]->setIntReg(NumIntArchRegs + 7, 0); 119 //Set the trap level to 0 120 threadContexts[0]->setMiscReg(MISCREG_TL, 0); 121 //Set the ASI register to something fixed 122 threadContexts[0]->setMiscReg(MISCREG_ASI, ASI_PRIMARY); 123} 124 125void 126Sparc64LiveProcess::startup() 127{ 128 argsInit(sizeof(IntReg), VMPageSize); 129 130 //From the SPARC ABI 131 132 //The process runs in user mode 133 threadContexts[0]->setMiscRegWithEffect(MISCREG_PSTATE, 0x02); 134 135 //Setup default FP state 136 threadContexts[0]->setMiscReg(MISCREG_FSR, 0); 137 138 threadContexts[0]->setMiscReg(MISCREG_TICK, 0); 139 // 140 /* 141 * Register window management registers 142 */ 143 144 //No windows contain info from other programs 145 //threadContexts[0]->setMiscReg(MISCREG_OTHERWIN, 0); 146 threadContexts[0]->setIntReg(NumIntArchRegs + 6, 0); 147 //There are no windows to pop 148 //threadContexts[0]->setMiscReg(MISCREG_CANRESTORE, 0); 149 threadContexts[0]->setIntReg(NumIntArchRegs + 4, 0); 150 //All windows are available to save into 151 //threadContexts[0]->setMiscReg(MISCREG_CANSAVE, NWindows - 2); 152 threadContexts[0]->setIntReg(NumIntArchRegs + 3, NWindows - 2); 153 //All windows are "clean" 154 //threadContexts[0]->setMiscReg(MISCREG_CLEANWIN, NWindows); 155 threadContexts[0]->setIntReg(NumIntArchRegs + 5, NWindows); 156 //Start with register window 0 157 threadContexts[0]->setMiscReg(MISCREG_CWP, 0); 158 //Always use spill and fill traps 0 159 //threadContexts[0]->setMiscReg(MISCREG_WSTATE, 0); 160 threadContexts[0]->setIntReg(NumIntArchRegs + 7, 0); 161 //Set the trap level to 0 162 threadContexts[0]->setMiscReg(MISCREG_TL, 0); 163 //Set the ASI register to something fixed 164 threadContexts[0]->setMiscReg(MISCREG_ASI, ASI_PRIMARY); 165} 166 167M5_32_auxv_t::M5_32_auxv_t(int32_t type, int32_t val) 168{ 169 a_type = TheISA::htog(type); 170 a_val = TheISA::htog(val); 171} 172 173M5_64_auxv_t::M5_64_auxv_t(int64_t type, int64_t val) 174{ 175 a_type = TheISA::htog(type); 176 a_val = TheISA::htog(val); 177} 178 179void 180Sparc64LiveProcess::argsInit(int intSize, int pageSize) 181{ 182 typedef M5_64_auxv_t auxv_t; 183 Process::startup(); 184 185 string filename; 186 if(argv.size() < 1) 187 filename = ""; 188 else 189 filename = argv[0]; 190 191 Addr alignmentMask = ~(intSize - 1); 192 193 // load object file into target memory 194 objFile->loadSections(initVirtMem); 195 196 //These are the auxilliary vector types 197 enum auxTypes 198 { 199 SPARC_AT_HWCAP = 16, 200 SPARC_AT_PAGESZ = 6, 201 SPARC_AT_CLKTCK = 17, 202 SPARC_AT_PHDR = 3, 203 SPARC_AT_PHENT = 4, 204 SPARC_AT_PHNUM = 5, 205 SPARC_AT_BASE = 7, 206 SPARC_AT_FLAGS = 8, 207 SPARC_AT_ENTRY = 9, 208 SPARC_AT_UID = 11, 209 SPARC_AT_EUID = 12, 210 SPARC_AT_GID = 13, 211 SPARC_AT_EGID = 14, 212 SPARC_AT_SECURE = 23 213 }; 214 215 enum hardwareCaps 216 { 217 M5_HWCAP_SPARC_FLUSH = 1, 218 M5_HWCAP_SPARC_STBAR = 2, 219 M5_HWCAP_SPARC_SWAP = 4, 220 M5_HWCAP_SPARC_MULDIV = 8, 221 M5_HWCAP_SPARC_V9 = 16, 222 //This one should technically only be set 223 //if there is a cheetah or cheetah_plus tlb, 224 //but we'll use it all the time 225 M5_HWCAP_SPARC_ULTRA3 = 32 226 }; 227 228 const int64_t hwcap = 229 M5_HWCAP_SPARC_FLUSH | 230 M5_HWCAP_SPARC_STBAR | 231 M5_HWCAP_SPARC_SWAP | 232 M5_HWCAP_SPARC_MULDIV | 233 M5_HWCAP_SPARC_V9 | 234 M5_HWCAP_SPARC_ULTRA3; 235 236 237 //Setup the auxilliary vectors. These will already have endian conversion. 238 //Auxilliary vectors are loaded only for elf formatted executables. 239 ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile); 240 if(elfObject) 241 { 242 //Bits which describe the system hardware capabilities 243 auxv.push_back(auxv_t(SPARC_AT_HWCAP, hwcap)); 244 //The system page size 245 auxv.push_back(auxv_t(SPARC_AT_PAGESZ, SparcISA::VMPageSize)); 246 //Defined to be 100 in the kernel source. 247 //Frequency at which times() increments 248 auxv.push_back(auxv_t(SPARC_AT_CLKTCK, 100)); 249 // For statically linked executables, this is the virtual address of the 250 // program header tables if they appear in the executable image 251 auxv.push_back(auxv_t(SPARC_AT_PHDR, elfObject->programHeaderTable())); 252 // This is the size of a program header entry from the elf file. 253 auxv.push_back(auxv_t(SPARC_AT_PHENT, elfObject->programHeaderSize())); 254 // This is the number of program headers from the original elf file. 255 auxv.push_back(auxv_t(SPARC_AT_PHNUM, elfObject->programHeaderCount())); 256 //This is the address of the elf "interpreter", It should be set 257 //to 0 for regular executables. It should be something else 258 //(not sure what) for dynamic libraries. 259 auxv.push_back(auxv_t(SPARC_AT_BASE, 0)); 260 //This is hardwired to 0 in the elf loading code in the kernel 261 auxv.push_back(auxv_t(SPARC_AT_FLAGS, 0)); 262 //The entry point to the program 263 auxv.push_back(auxv_t(SPARC_AT_ENTRY, objFile->entryPoint())); 264 //Different user and group IDs 265 auxv.push_back(auxv_t(SPARC_AT_UID, uid())); 266 auxv.push_back(auxv_t(SPARC_AT_EUID, euid())); 267 auxv.push_back(auxv_t(SPARC_AT_GID, gid())); 268 auxv.push_back(auxv_t(SPARC_AT_EGID, egid())); 269 //Whether to enable "secure mode" in the executable 270 auxv.push_back(auxv_t(SPARC_AT_SECURE, 0)); 271 } 272 273 //Figure out how big the initial stack needs to be 274 275 // The unaccounted for 0 at the top of the stack 276 int mysterious_size = intSize; 277 278 //This is the name of the file which is present on the initial stack 279 //It's purpose is to let the user space linker examine the original file. 280 int file_name_size = filename.size() + 1; 281 282 int env_data_size = 0; 283 for (int i = 0; i < envp.size(); ++i) { 284 env_data_size += envp[i].size() + 1; 285 } 286 int arg_data_size = 0; 287 for (int i = 0; i < argv.size(); ++i) { 288 arg_data_size += argv[i].size() + 1; 289 } 290 291 //The info_block needs to be padded so it's size is a multiple of the 292 //alignment mask. Also, it appears that there needs to be at least some 293 //padding, so if the size is already a multiple, we need to increase it 294 //anyway. 295 int info_block_size = 296 (file_name_size + 297 env_data_size + 298 arg_data_size + 299 intSize) & alignmentMask; 300 301 int info_block_padding = 302 info_block_size - 303 file_name_size - 304 env_data_size - 305 arg_data_size; 306 307 //Each auxilliary vector is two 8 byte words 308 int aux_array_size = intSize * 2 * (auxv.size() + 1); 309 310 int envp_array_size = intSize * (envp.size() + 1); 311 int argv_array_size = intSize * (argv.size() + 1); 312 313 int argc_size = intSize; 314 int window_save_size = intSize * 16; 315 316 int space_needed = 317 mysterious_size + 318 info_block_size + 319 aux_array_size + 320 envp_array_size + 321 argv_array_size + 322 argc_size + 323 window_save_size; 324 325 stack_min = stack_base - space_needed; 326 stack_min &= alignmentMask; 327 stack_size = stack_base - stack_min; 328 329 // map memory 330 pTable->allocate(roundDown(stack_min, pageSize), 331 roundUp(stack_size, pageSize)); 332 333 // map out initial stack contents 334 Addr mysterious_base = stack_base - mysterious_size; 335 Addr file_name_base = mysterious_base - file_name_size; 336 Addr env_data_base = file_name_base - env_data_size; 337 Addr arg_data_base = env_data_base - arg_data_size; 338 Addr auxv_array_base = arg_data_base - aux_array_size - info_block_padding; 339 Addr envp_array_base = auxv_array_base - envp_array_size; 340 Addr argv_array_base = envp_array_base - argv_array_size; 341 Addr argc_base = argv_array_base - argc_size; 342#ifndef NDEBUG 343 // only used in DPRINTF 344 Addr window_save_base = argc_base - window_save_size; 345#endif 346 347 DPRINTF(Sparc, "The addresses of items on the initial stack:\n"); 348 DPRINTF(Sparc, "0x%x - file name\n", file_name_base); 349 DPRINTF(Sparc, "0x%x - env data\n", env_data_base); 350 DPRINTF(Sparc, "0x%x - arg data\n", arg_data_base); 351 DPRINTF(Sparc, "0x%x - auxv array\n", auxv_array_base); 352 DPRINTF(Sparc, "0x%x - envp array\n", envp_array_base); 353 DPRINTF(Sparc, "0x%x - argv array\n", argv_array_base); 354 DPRINTF(Sparc, "0x%x - argc \n", argc_base); 355 DPRINTF(Sparc, "0x%x - window save\n", window_save_base); 356 DPRINTF(Sparc, "0x%x - stack min\n", stack_min); 357 358 // write contents to stack 359 360 // figure out argc 361 uint64_t argc = argv.size(); 362 uint64_t guestArgc = TheISA::htog(argc); 363 364 //Write out the mysterious 0 365 uint64_t mysterious_zero = 0; 366 initVirtMem->writeBlob(mysterious_base, 367 (uint8_t*)&mysterious_zero, mysterious_size); 368 369 //Write the file name 370 initVirtMem->writeString(file_name_base, filename.c_str()); 371 372 //Copy the aux stuff 373 for(int x = 0; x < auxv.size(); x++) 374 { 375 initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize, 376 (uint8_t*)&(auxv[x].a_type), intSize); 377 initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize, 378 (uint8_t*)&(auxv[x].a_val), intSize); 379 } 380 //Write out the terminating zeroed auxilliary vector 381 const uint64_t zero = 0; 382 initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(), 383 (uint8_t*)&zero, 2 * intSize); 384 385 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem); 386 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem); 387 388 initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize); 389 390 //Stuff the trap handlers into the processes address space. 391 //Since the stack grows down and is the highest area in the processes 392 //address space, we can put stuff above it and stay out of the way. 393 int fillSize = sizeof(MachInst) * numFillInsts; 394 int spillSize = sizeof(MachInst) * numSpillInsts; 395 fillStart = stack_base; 396 spillStart = fillStart + fillSize; 397 initVirtMem->writeBlob(fillStart, (uint8_t*)fillHandler64, fillSize); 398 initVirtMem->writeBlob(spillStart, (uint8_t*)spillHandler64, spillSize); 399 400 //Set up the thread context to start running the process 401 threadContexts[0]->setIntReg(ArgumentReg0, argc); 402 threadContexts[0]->setIntReg(ArgumentReg1, argv_array_base); 403 threadContexts[0]->setIntReg(StackPointerReg, stack_min - StackBias); 404 405 Addr prog_entry = objFile->entryPoint(); 406 threadContexts[0]->setPC(prog_entry); 407 threadContexts[0]->setNextPC(prog_entry + sizeof(MachInst)); 408 threadContexts[0]->setNextNPC(prog_entry + (2 * sizeof(MachInst))); 409 410 //Align the "stack_min" to a page boundary. 411 stack_min = roundDown(stack_min, pageSize); 412 413// num_processes++; 414} 415 416void 417Sparc32LiveProcess::argsInit(int intSize, int pageSize) 418{ 419 typedef M5_32_auxv_t auxv_t; 420 Process::startup(); 421 422 string filename; 423 if(argv.size() < 1) 424 filename = ""; 425 else 426 filename = argv[0]; 427 428 //Even though this is a 32 bit process, the ABI says we still need to 429 //maintain double word alignment of the stack pointer. 430 Addr alignmentMask = ~(8 - 1); 431 432 // load object file into target memory 433 objFile->loadSections(initVirtMem); 434 435 //These are the auxilliary vector types 436 enum auxTypes 437 { 438 SPARC_AT_HWCAP = 16, 439 SPARC_AT_PAGESZ = 6, 440 SPARC_AT_CLKTCK = 17, 441 SPARC_AT_PHDR = 3, 442 SPARC_AT_PHENT = 4, 443 SPARC_AT_PHNUM = 5, 444 SPARC_AT_BASE = 7, 445 SPARC_AT_FLAGS = 8, 446 SPARC_AT_ENTRY = 9, 447 SPARC_AT_UID = 11, 448 SPARC_AT_EUID = 12, 449 SPARC_AT_GID = 13, 450 SPARC_AT_EGID = 14, 451 SPARC_AT_SECURE = 23 452 }; 453 454 enum hardwareCaps 455 { 456 M5_HWCAP_SPARC_FLUSH = 1, 457 M5_HWCAP_SPARC_STBAR = 2, 458 M5_HWCAP_SPARC_SWAP = 4, 459 M5_HWCAP_SPARC_MULDIV = 8, 460 M5_HWCAP_SPARC_V9 = 16, 461 //This one should technically only be set 462 //if there is a cheetah or cheetah_plus tlb, 463 //but we'll use it all the time 464 M5_HWCAP_SPARC_ULTRA3 = 32 465 }; 466 467 const int64_t hwcap = 468 M5_HWCAP_SPARC_FLUSH | 469 M5_HWCAP_SPARC_STBAR | 470 M5_HWCAP_SPARC_SWAP | 471 M5_HWCAP_SPARC_MULDIV | 472 M5_HWCAP_SPARC_V9 | 473 M5_HWCAP_SPARC_ULTRA3; 474 475 476 //Setup the auxilliary vectors. These will already have endian conversion. 477 //Auxilliary vectors are loaded only for elf formatted executables. 478 ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile); 479 if(elfObject) 480 { 481 //Bits which describe the system hardware capabilities 482 auxv.push_back(auxv_t(SPARC_AT_HWCAP, hwcap)); 483 //The system page size 484 auxv.push_back(auxv_t(SPARC_AT_PAGESZ, SparcISA::VMPageSize)); 485 //Defined to be 100 in the kernel source. 486 //Frequency at which times() increments 487 auxv.push_back(auxv_t(SPARC_AT_CLKTCK, 100)); 488 // For statically linked executables, this is the virtual address of the 489 // program header tables if they appear in the executable image 490 auxv.push_back(auxv_t(SPARC_AT_PHDR, elfObject->programHeaderTable())); 491 // This is the size of a program header entry from the elf file. 492 auxv.push_back(auxv_t(SPARC_AT_PHENT, elfObject->programHeaderSize())); 493 // This is the number of program headers from the original elf file. 494 auxv.push_back(auxv_t(SPARC_AT_PHNUM, elfObject->programHeaderCount())); 495 //This is the address of the elf "interpreter", It should be set 496 //to 0 for regular executables. It should be something else 497 //(not sure what) for dynamic libraries. 498 auxv.push_back(auxv_t(SPARC_AT_BASE, 0)); 499 //This is hardwired to 0 in the elf loading code in the kernel 500 auxv.push_back(auxv_t(SPARC_AT_FLAGS, 0)); 501 //The entry point to the program 502 auxv.push_back(auxv_t(SPARC_AT_ENTRY, objFile->entryPoint())); 503 //Different user and group IDs 504 auxv.push_back(auxv_t(SPARC_AT_UID, uid())); 505 auxv.push_back(auxv_t(SPARC_AT_EUID, euid())); 506 auxv.push_back(auxv_t(SPARC_AT_GID, gid())); 507 auxv.push_back(auxv_t(SPARC_AT_EGID, egid())); 508 //Whether to enable "secure mode" in the executable 509 auxv.push_back(auxv_t(SPARC_AT_SECURE, 0)); 510 } 511 512 //Figure out how big the initial stack needs to be 513 514 // The unaccounted for 8 byte 0 at the top of the stack 515 int mysterious_size = 8; 516 517 //This is the name of the file which is present on the initial stack 518 //It's purpose is to let the user space linker examine the original file. 519 int file_name_size = filename.size() + 1; 520 521 int env_data_size = 0; 522 for (int i = 0; i < envp.size(); ++i) { 523 env_data_size += envp[i].size() + 1; 524 } 525 int arg_data_size = 0; 526 for (int i = 0; i < argv.size(); ++i) { 527 arg_data_size += argv[i].size() + 1; 528 } 529 530 //The info_block - This seems to need an pad for some reason. 531 int info_block_size = 532 (mysterious_size + 533 file_name_size + 534 env_data_size + 535 arg_data_size + intSize); 536 537 //Each auxilliary vector is two 4 byte words 538 int aux_array_size = intSize * 2 * (auxv.size() + 1); 539 540 int envp_array_size = intSize * (envp.size() + 1); 541 int argv_array_size = intSize * (argv.size() + 1); 542 543 int argc_size = intSize; 544 int window_save_size = intSize * 16; 545 546 int space_needed = 547 info_block_size + 548 aux_array_size + 549 envp_array_size + 550 argv_array_size + 551 argc_size + 552 window_save_size; 553 554 stack_min = stack_base - space_needed; 555 stack_min &= alignmentMask; 556 stack_size = stack_base - stack_min; 557 558 // map memory 559 pTable->allocate(roundDown(stack_min, pageSize), 560 roundUp(stack_size, pageSize)); 561 562 // map out initial stack contents 563 uint32_t window_save_base = stack_min; 564 uint32_t argc_base = window_save_base + window_save_size; 565 uint32_t argv_array_base = argc_base + argc_size; 566 uint32_t envp_array_base = argv_array_base + argv_array_size; 567 uint32_t auxv_array_base = envp_array_base + envp_array_size; 568 //The info block is pushed up against the top of the stack, while 569 //the rest of the initial stack frame is aligned to an 8 byte boudary. 570 uint32_t arg_data_base = stack_base - info_block_size + intSize; 571 uint32_t env_data_base = arg_data_base + arg_data_size; 572 uint32_t file_name_base = env_data_base + env_data_size; 573 uint32_t mysterious_base = file_name_base + file_name_size; 574 575 DPRINTF(Sparc, "The addresses of items on the initial stack:\n"); 576 DPRINTF(Sparc, "0x%x - file name\n", file_name_base); 577 DPRINTF(Sparc, "0x%x - env data\n", env_data_base); 578 DPRINTF(Sparc, "0x%x - arg data\n", arg_data_base); 579 DPRINTF(Sparc, "0x%x - auxv array\n", auxv_array_base); 580 DPRINTF(Sparc, "0x%x - envp array\n", envp_array_base); 581 DPRINTF(Sparc, "0x%x - argv array\n", argv_array_base); 582 DPRINTF(Sparc, "0x%x - argc \n", argc_base); 583 DPRINTF(Sparc, "0x%x - window save\n", window_save_base); 584 DPRINTF(Sparc, "0x%x - stack min\n", stack_min); 585 586 // write contents to stack 587 588 // figure out argc 589 uint32_t argc = argv.size(); 590 uint32_t guestArgc = TheISA::htog(argc); 591 592 //Write out the mysterious 0 593 uint64_t mysterious_zero = 0; 594 initVirtMem->writeBlob(mysterious_base, 595 (uint8_t*)&mysterious_zero, mysterious_size); 596 597 //Write the file name 598 initVirtMem->writeString(file_name_base, filename.c_str()); 599 600 //Copy the aux stuff 601 for(int x = 0; x < auxv.size(); x++) 602 { 603 initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize, 604 (uint8_t*)&(auxv[x].a_type), intSize); 605 initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize, 606 (uint8_t*)&(auxv[x].a_val), intSize); 607 } 608 //Write out the terminating zeroed auxilliary vector 609 const uint64_t zero = 0; 610 initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(), 611 (uint8_t*)&zero, 2 * intSize); 612 613 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem); 614 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem); 615 616 initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize); 617 618 //Stuff the trap handlers into the processes address space. 619 //Since the stack grows down and is the highest area in the processes 620 //address space, we can put stuff above it and stay out of the way. 621 int fillSize = sizeof(MachInst) * numFillInsts; 622 int spillSize = sizeof(MachInst) * numSpillInsts; 623 fillStart = stack_base; 624 spillStart = fillStart + fillSize; 625 initVirtMem->writeBlob(fillStart, (uint8_t*)fillHandler32, fillSize); 626 initVirtMem->writeBlob(spillStart, (uint8_t*)spillHandler32, spillSize); 627 628 //Set up the thread context to start running the process 629 //threadContexts[0]->setIntReg(ArgumentReg0, argc); 630 //threadContexts[0]->setIntReg(ArgumentReg1, argv_array_base); 631 threadContexts[0]->setIntReg(StackPointerReg, stack_min); 632 633 uint32_t prog_entry = objFile->entryPoint(); 634 threadContexts[0]->setPC(prog_entry); 635 threadContexts[0]->setNextPC(prog_entry + sizeof(MachInst)); 636 threadContexts[0]->setNextNPC(prog_entry + (2 * sizeof(MachInst))); 637 638 //Align the "stack_min" to a page boundary. 639 stack_min = roundDown(stack_min, pageSize); 640 641// num_processes++; 642} 643