process.cc revision 5128
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 0x01: //Software breakpoint 77 warn("Software breakpoint encountered at pc %#x.\n", tc->readPC()); 78 break; 79 case 0x02: //Division by zero 80 warn("Software signaled a division by zero at pc %#x.\n", 81 tc->readPC()); 82 break; 83 case 0x03: //Flush window trap 84 flushWindows(tc); 85 break; 86 case 0x04: //Clean windows 87 warn("Ignoring process request for clean register " 88 "windows at pc %#x.\n", tc->readPC()); 89 break; 90 case 0x05: //Range check 91 warn("Software signaled a range check at pc %#x.\n", 92 tc->readPC()); 93 break; 94 case 0x06: //Fix alignment 95 warn("Ignoring process request for os assisted unaligned accesses " 96 "at pc %#x.\n", tc->readPC()); 97 break; 98 case 0x07: //Integer overflow 99 warn("Software signaled an integer overflow at pc %#x.\n", 100 tc->readPC()); 101 break; 102 case 0x32: //Get integer condition codes 103 warn("Ignoring process request to get the integer condition codes " 104 "at pc %#x.\n", tc->readPC()); 105 break; 106 case 0x33: //Set integer condition codes 107 warn("Ignoring process request to set the integer condition codes " 108 "at pc %#x.\n", tc->readPC()); 109 break; 110 default: 111 panic("Unimplemented trap to operating system: trap number %#x.\n", trapNum); 112 } 113} 114 115void 116Sparc32LiveProcess::startup() 117{ 118 argsInit(32 / 8, VMPageSize); 119 120 //From the SPARC ABI 121 122 //The process runs in user mode with 32 bit addresses 123 threadContexts[0]->setMiscReg(MISCREG_PSTATE, 0x0a); 124 125 //Setup default FP state 126 threadContexts[0]->setMiscRegNoEffect(MISCREG_FSR, 0); 127 128 threadContexts[0]->setMiscRegNoEffect(MISCREG_TICK, 0); 129 // 130 /* 131 * Register window management registers 132 */ 133 134 //No windows contain info from other programs 135 //threadContexts[0]->setMiscRegNoEffect(MISCREG_OTHERWIN, 0); 136 threadContexts[0]->setIntReg(NumIntArchRegs + 6, 0); 137 //There are no windows to pop 138 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANRESTORE, 0); 139 threadContexts[0]->setIntReg(NumIntArchRegs + 4, 0); 140 //All windows are available to save into 141 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANSAVE, NWindows - 2); 142 threadContexts[0]->setIntReg(NumIntArchRegs + 3, NWindows - 2); 143 //All windows are "clean" 144 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CLEANWIN, NWindows); 145 threadContexts[0]->setIntReg(NumIntArchRegs + 5, NWindows); 146 //Start with register window 0 147 threadContexts[0]->setMiscRegNoEffect(MISCREG_CWP, 0); 148 //Always use spill and fill traps 0 149 //threadContexts[0]->setMiscRegNoEffect(MISCREG_WSTATE, 0); 150 threadContexts[0]->setIntReg(NumIntArchRegs + 7, 0); 151 //Set the trap level to 0 152 threadContexts[0]->setMiscRegNoEffect(MISCREG_TL, 0); 153 //Set the ASI register to something fixed 154 threadContexts[0]->setMiscRegNoEffect(MISCREG_ASI, ASI_PRIMARY); 155 156 /* 157 * T1 specific registers 158 */ 159 //Turn on the icache, dcache, dtb translation, and itb translation. 160 threadContexts[0]->setMiscRegNoEffect(MISCREG_MMU_LSU_CTRL, 15); 161} 162 163void 164Sparc64LiveProcess::startup() 165{ 166 argsInit(sizeof(IntReg), VMPageSize); 167 168 //From the SPARC ABI 169 170 //The process runs in user mode 171 threadContexts[0]->setMiscReg(MISCREG_PSTATE, 0x02); 172 173 //Setup default FP state 174 threadContexts[0]->setMiscRegNoEffect(MISCREG_FSR, 0); 175 176 threadContexts[0]->setMiscRegNoEffect(MISCREG_TICK, 0); 177 178 /* 179 * Register window management registers 180 */ 181 182 //No windows contain info from other programs 183 //threadContexts[0]->setMiscRegNoEffect(MISCREG_OTHERWIN, 0); 184 threadContexts[0]->setIntReg(NumIntArchRegs + 6, 0); 185 //There are no windows to pop 186 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANRESTORE, 0); 187 threadContexts[0]->setIntReg(NumIntArchRegs + 4, 0); 188 //All windows are available to save into 189 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANSAVE, NWindows - 2); 190 threadContexts[0]->setIntReg(NumIntArchRegs + 3, NWindows - 2); 191 //All windows are "clean" 192 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CLEANWIN, NWindows); 193 threadContexts[0]->setIntReg(NumIntArchRegs + 5, NWindows); 194 //Start with register window 0 195 threadContexts[0]->setMiscRegNoEffect(MISCREG_CWP, 0); 196 //Always use spill and fill traps 0 197 //threadContexts[0]->setMiscRegNoEffect(MISCREG_WSTATE, 0); 198 threadContexts[0]->setIntReg(NumIntArchRegs + 7, 0); 199 //Set the trap level to 0 200 threadContexts[0]->setMiscRegNoEffect(MISCREG_TL, 0); 201 //Set the ASI register to something fixed 202 threadContexts[0]->setMiscRegNoEffect(MISCREG_ASI, ASI_PRIMARY); 203 204 /* 205 * T1 specific registers 206 */ 207 //Turn on the icache, dcache, dtb translation, and itb translation. 208 threadContexts[0]->setMiscRegNoEffect(MISCREG_MMU_LSU_CTRL, 15); 209} 210 211M5_32_auxv_t::M5_32_auxv_t(int32_t type, int32_t val) 212{ 213 a_type = TheISA::htog(type); 214 a_val = TheISA::htog(val); 215} 216 217M5_64_auxv_t::M5_64_auxv_t(int64_t type, int64_t val) 218{ 219 a_type = TheISA::htog(type); 220 a_val = TheISA::htog(val); 221} 222 223void 224Sparc64LiveProcess::argsInit(int intSize, int pageSize) 225{ 226 typedef M5_64_auxv_t auxv_t; 227 Process::startup(); 228 229 string filename; 230 if(argv.size() < 1) 231 filename = ""; 232 else 233 filename = argv[0]; 234 235 Addr alignmentMask = ~(intSize - 1); 236 237 // load object file into target memory 238 objFile->loadSections(initVirtMem); 239 240 enum hardwareCaps 241 { 242 M5_HWCAP_SPARC_FLUSH = 1, 243 M5_HWCAP_SPARC_STBAR = 2, 244 M5_HWCAP_SPARC_SWAP = 4, 245 M5_HWCAP_SPARC_MULDIV = 8, 246 M5_HWCAP_SPARC_V9 = 16, 247 //This one should technically only be set 248 //if there is a cheetah or cheetah_plus tlb, 249 //but we'll use it all the time 250 M5_HWCAP_SPARC_ULTRA3 = 32 251 }; 252 253 const int64_t hwcap = 254 M5_HWCAP_SPARC_FLUSH | 255 M5_HWCAP_SPARC_STBAR | 256 M5_HWCAP_SPARC_SWAP | 257 M5_HWCAP_SPARC_MULDIV | 258 M5_HWCAP_SPARC_V9 | 259 M5_HWCAP_SPARC_ULTRA3; 260 261 262 //Setup the auxilliary vectors. These will already have endian conversion. 263 //Auxilliary vectors are loaded only for elf formatted executables. 264 ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile); 265 if(elfObject) 266 { 267 //Bits which describe the system hardware capabilities 268 auxv.push_back(auxv_t(M5_AT_HWCAP, hwcap)); 269 //The system page size 270 auxv.push_back(auxv_t(M5_AT_PAGESZ, SparcISA::VMPageSize)); 271 //Defined to be 100 in the kernel source. 272 //Frequency at which times() increments 273 auxv.push_back(auxv_t(M5_AT_CLKTCK, 100)); 274 // For statically linked executables, this is the virtual address of the 275 // program header tables if they appear in the executable image 276 auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable())); 277 // This is the size of a program header entry from the elf file. 278 auxv.push_back(auxv_t(M5_AT_PHENT, elfObject->programHeaderSize())); 279 // This is the number of program headers from the original elf file. 280 auxv.push_back(auxv_t(M5_AT_PHNUM, elfObject->programHeaderCount())); 281 //This is the address of the elf "interpreter", It should be set 282 //to 0 for regular executables. It should be something else 283 //(not sure what) for dynamic libraries. 284 auxv.push_back(auxv_t(M5_AT_BASE, 0)); 285 //This is hardwired to 0 in the elf loading code in the kernel 286 auxv.push_back(auxv_t(M5_AT_FLAGS, 0)); 287 //The entry point to the program 288 auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint())); 289 //Different user and group IDs 290 auxv.push_back(auxv_t(M5_AT_UID, uid())); 291 auxv.push_back(auxv_t(M5_AT_EUID, euid())); 292 auxv.push_back(auxv_t(M5_AT_GID, gid())); 293 auxv.push_back(auxv_t(M5_AT_EGID, egid())); 294 //Whether to enable "secure mode" in the executable 295 auxv.push_back(auxv_t(M5_AT_SECURE, 0)); 296 } 297 298 //Figure out how big the initial stack needs to be 299 300 // The unaccounted for 0 at the top of the stack 301 int mysterious_size = intSize; 302 303 //This is the name of the file which is present on the initial stack 304 //It's purpose is to let the user space linker examine the original file. 305 int file_name_size = filename.size() + 1; 306 307 int env_data_size = 0; 308 for (int i = 0; i < envp.size(); ++i) { 309 env_data_size += envp[i].size() + 1; 310 } 311 int arg_data_size = 0; 312 for (int i = 0; i < argv.size(); ++i) { 313 arg_data_size += argv[i].size() + 1; 314 } 315 316 //The info_block needs to be padded so it's size is a multiple of the 317 //alignment mask. Also, it appears that there needs to be at least some 318 //padding, so if the size is already a multiple, we need to increase it 319 //anyway. 320 int info_block_size = 321 (file_name_size + 322 env_data_size + 323 arg_data_size + 324 intSize) & alignmentMask; 325 326 int info_block_padding = 327 info_block_size - 328 file_name_size - 329 env_data_size - 330 arg_data_size; 331 332 //Each auxilliary vector is two 8 byte words 333 int aux_array_size = intSize * 2 * (auxv.size() + 1); 334 335 int envp_array_size = intSize * (envp.size() + 1); 336 int argv_array_size = intSize * (argv.size() + 1); 337 338 int argc_size = intSize; 339 int window_save_size = intSize * 16; 340 341 int space_needed = 342 mysterious_size + 343 info_block_size + 344 aux_array_size + 345 envp_array_size + 346 argv_array_size + 347 argc_size + 348 window_save_size; 349 350 stack_min = stack_base - space_needed; 351 stack_min &= alignmentMask; 352 stack_size = stack_base - stack_min; 353 354 // map memory 355 pTable->allocate(roundDown(stack_min, pageSize), 356 roundUp(stack_size, pageSize)); 357 358 // map out initial stack contents 359 Addr mysterious_base = stack_base - mysterious_size; 360 Addr file_name_base = mysterious_base - file_name_size; 361 Addr env_data_base = file_name_base - env_data_size; 362 Addr arg_data_base = env_data_base - arg_data_size; 363 Addr auxv_array_base = arg_data_base - aux_array_size - info_block_padding; 364 Addr envp_array_base = auxv_array_base - envp_array_size; 365 Addr argv_array_base = envp_array_base - argv_array_size; 366 Addr argc_base = argv_array_base - argc_size; 367#ifndef NDEBUG 368 // only used in DPRINTF 369 Addr window_save_base = argc_base - window_save_size; 370#endif 371 372 DPRINTF(Sparc, "The addresses of items on the initial stack:\n"); 373 DPRINTF(Sparc, "0x%x - file name\n", file_name_base); 374 DPRINTF(Sparc, "0x%x - env data\n", env_data_base); 375 DPRINTF(Sparc, "0x%x - arg data\n", arg_data_base); 376 DPRINTF(Sparc, "0x%x - auxv array\n", auxv_array_base); 377 DPRINTF(Sparc, "0x%x - envp array\n", envp_array_base); 378 DPRINTF(Sparc, "0x%x - argv array\n", argv_array_base); 379 DPRINTF(Sparc, "0x%x - argc \n", argc_base); 380 DPRINTF(Sparc, "0x%x - window save\n", window_save_base); 381 DPRINTF(Sparc, "0x%x - stack min\n", stack_min); 382 383 // write contents to stack 384 385 // figure out argc 386 uint64_t argc = argv.size(); 387 uint64_t guestArgc = TheISA::htog(argc); 388 389 //Write out the mysterious 0 390 uint64_t mysterious_zero = 0; 391 initVirtMem->writeBlob(mysterious_base, 392 (uint8_t*)&mysterious_zero, mysterious_size); 393 394 //Write the file name 395 initVirtMem->writeString(file_name_base, filename.c_str()); 396 397 //Copy the aux stuff 398 for(int x = 0; x < auxv.size(); x++) 399 { 400 initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize, 401 (uint8_t*)&(auxv[x].a_type), intSize); 402 initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize, 403 (uint8_t*)&(auxv[x].a_val), intSize); 404 } 405 //Write out the terminating zeroed auxilliary vector 406 const uint64_t zero = 0; 407 initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(), 408 (uint8_t*)&zero, 2 * intSize); 409 410 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem); 411 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem); 412 413 initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize); 414 415 //Stuff the trap handlers into the processes address space. 416 //Since the stack grows down and is the highest area in the processes 417 //address space, we can put stuff above it and stay out of the way. 418 int fillSize = sizeof(MachInst) * numFillInsts; 419 int spillSize = sizeof(MachInst) * numSpillInsts; 420 fillStart = stack_base; 421 spillStart = fillStart + fillSize; 422 initVirtMem->writeBlob(fillStart, (uint8_t*)fillHandler64, fillSize); 423 initVirtMem->writeBlob(spillStart, (uint8_t*)spillHandler64, spillSize); 424 425 //Set up the thread context to start running the process 426 assert(NumArgumentRegs >= 2); 427 threadContexts[0]->setIntReg(ArgumentReg[0], argc); 428 threadContexts[0]->setIntReg(ArgumentReg[1], argv_array_base); 429 threadContexts[0]->setIntReg(StackPointerReg, stack_min - StackBias); 430 431 Addr prog_entry = objFile->entryPoint(); 432 threadContexts[0]->setPC(prog_entry); 433 threadContexts[0]->setNextPC(prog_entry + sizeof(MachInst)); 434 threadContexts[0]->setNextNPC(prog_entry + (2 * sizeof(MachInst))); 435 436 //Align the "stack_min" to a page boundary. 437 stack_min = roundDown(stack_min, pageSize); 438 439// num_processes++; 440} 441 442void 443Sparc32LiveProcess::argsInit(int intSize, int pageSize) 444{ 445 typedef M5_32_auxv_t auxv_t; 446 Process::startup(); 447 448 string filename; 449 if(argv.size() < 1) 450 filename = ""; 451 else 452 filename = argv[0]; 453 454 //Even though this is a 32 bit process, the ABI says we still need to 455 //maintain double word alignment of the stack pointer. 456 Addr alignmentMask = ~(8 - 1); 457 458 // load object file into target memory 459 objFile->loadSections(initVirtMem); 460 461 //These are the auxilliary vector types 462 enum auxTypes 463 { 464 SPARC_AT_HWCAP = 16, 465 SPARC_AT_PAGESZ = 6, 466 SPARC_AT_CLKTCK = 17, 467 SPARC_AT_PHDR = 3, 468 SPARC_AT_PHENT = 4, 469 SPARC_AT_PHNUM = 5, 470 SPARC_AT_BASE = 7, 471 SPARC_AT_FLAGS = 8, 472 SPARC_AT_ENTRY = 9, 473 SPARC_AT_UID = 11, 474 SPARC_AT_EUID = 12, 475 SPARC_AT_GID = 13, 476 SPARC_AT_EGID = 14, 477 SPARC_AT_SECURE = 23 478 }; 479 480 enum hardwareCaps 481 { 482 M5_HWCAP_SPARC_FLUSH = 1, 483 M5_HWCAP_SPARC_STBAR = 2, 484 M5_HWCAP_SPARC_SWAP = 4, 485 M5_HWCAP_SPARC_MULDIV = 8, 486 M5_HWCAP_SPARC_V9 = 16, 487 //This one should technically only be set 488 //if there is a cheetah or cheetah_plus tlb, 489 //but we'll use it all the time 490 M5_HWCAP_SPARC_ULTRA3 = 32 491 }; 492 493 const int64_t hwcap = 494 M5_HWCAP_SPARC_FLUSH | 495 M5_HWCAP_SPARC_STBAR | 496 M5_HWCAP_SPARC_SWAP | 497 M5_HWCAP_SPARC_MULDIV | 498 M5_HWCAP_SPARC_V9 | 499 M5_HWCAP_SPARC_ULTRA3; 500 501 502 //Setup the auxilliary vectors. These will already have endian conversion. 503 //Auxilliary vectors are loaded only for elf formatted executables. 504 ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile); 505 if(elfObject) 506 { 507 //Bits which describe the system hardware capabilities 508 auxv.push_back(auxv_t(SPARC_AT_HWCAP, hwcap)); 509 //The system page size 510 auxv.push_back(auxv_t(SPARC_AT_PAGESZ, SparcISA::VMPageSize)); 511 //Defined to be 100 in the kernel source. 512 //Frequency at which times() increments 513 auxv.push_back(auxv_t(SPARC_AT_CLKTCK, 100)); 514 // For statically linked executables, this is the virtual address of the 515 // program header tables if they appear in the executable image 516 auxv.push_back(auxv_t(SPARC_AT_PHDR, elfObject->programHeaderTable())); 517 // This is the size of a program header entry from the elf file. 518 auxv.push_back(auxv_t(SPARC_AT_PHENT, elfObject->programHeaderSize())); 519 // This is the number of program headers from the original elf file. 520 auxv.push_back(auxv_t(SPARC_AT_PHNUM, elfObject->programHeaderCount())); 521 //This is the address of the elf "interpreter", It should be set 522 //to 0 for regular executables. It should be something else 523 //(not sure what) for dynamic libraries. 524 auxv.push_back(auxv_t(SPARC_AT_BASE, 0)); 525 //This is hardwired to 0 in the elf loading code in the kernel 526 auxv.push_back(auxv_t(SPARC_AT_FLAGS, 0)); 527 //The entry point to the program 528 auxv.push_back(auxv_t(SPARC_AT_ENTRY, objFile->entryPoint())); 529 //Different user and group IDs 530 auxv.push_back(auxv_t(SPARC_AT_UID, uid())); 531 auxv.push_back(auxv_t(SPARC_AT_EUID, euid())); 532 auxv.push_back(auxv_t(SPARC_AT_GID, gid())); 533 auxv.push_back(auxv_t(SPARC_AT_EGID, egid())); 534 //Whether to enable "secure mode" in the executable 535 auxv.push_back(auxv_t(SPARC_AT_SECURE, 0)); 536 } 537 538 //Figure out how big the initial stack needs to be 539 540 // The unaccounted for 8 byte 0 at the top of the stack 541 int mysterious_size = 8; 542 543 //This is the name of the file which is present on the initial stack 544 //It's purpose is to let the user space linker examine the original file. 545 int file_name_size = filename.size() + 1; 546 547 int env_data_size = 0; 548 for (int i = 0; i < envp.size(); ++i) { 549 env_data_size += envp[i].size() + 1; 550 } 551 int arg_data_size = 0; 552 for (int i = 0; i < argv.size(); ++i) { 553 arg_data_size += argv[i].size() + 1; 554 } 555 556 //The info_block - This seems to need an pad for some reason. 557 int info_block_size = 558 (mysterious_size + 559 file_name_size + 560 env_data_size + 561 arg_data_size + intSize); 562 563 //Each auxilliary vector is two 4 byte words 564 int aux_array_size = intSize * 2 * (auxv.size() + 1); 565 566 int envp_array_size = intSize * (envp.size() + 1); 567 int argv_array_size = intSize * (argv.size() + 1); 568 569 int argc_size = intSize; 570 int window_save_size = intSize * 16; 571 572 int space_needed = 573 info_block_size + 574 aux_array_size + 575 envp_array_size + 576 argv_array_size + 577 argc_size + 578 window_save_size; 579 580 stack_min = stack_base - space_needed; 581 stack_min &= alignmentMask; 582 stack_size = stack_base - stack_min; 583 584 // map memory 585 pTable->allocate(roundDown(stack_min, pageSize), 586 roundUp(stack_size, pageSize)); 587 588 // map out initial stack contents 589 uint32_t window_save_base = stack_min; 590 uint32_t argc_base = window_save_base + window_save_size; 591 uint32_t argv_array_base = argc_base + argc_size; 592 uint32_t envp_array_base = argv_array_base + argv_array_size; 593 uint32_t auxv_array_base = envp_array_base + envp_array_size; 594 //The info block is pushed up against the top of the stack, while 595 //the rest of the initial stack frame is aligned to an 8 byte boudary. 596 uint32_t arg_data_base = stack_base - info_block_size + intSize; 597 uint32_t env_data_base = arg_data_base + arg_data_size; 598 uint32_t file_name_base = env_data_base + env_data_size; 599 uint32_t mysterious_base = file_name_base + file_name_size; 600 601 DPRINTF(Sparc, "The addresses of items on the initial stack:\n"); 602 DPRINTF(Sparc, "0x%x - file name\n", file_name_base); 603 DPRINTF(Sparc, "0x%x - env data\n", env_data_base); 604 DPRINTF(Sparc, "0x%x - arg data\n", arg_data_base); 605 DPRINTF(Sparc, "0x%x - auxv array\n", auxv_array_base); 606 DPRINTF(Sparc, "0x%x - envp array\n", envp_array_base); 607 DPRINTF(Sparc, "0x%x - argv array\n", argv_array_base); 608 DPRINTF(Sparc, "0x%x - argc \n", argc_base); 609 DPRINTF(Sparc, "0x%x - window save\n", window_save_base); 610 DPRINTF(Sparc, "0x%x - stack min\n", stack_min); 611 612 // write contents to stack 613 614 // figure out argc 615 uint32_t argc = argv.size(); 616 uint32_t guestArgc = TheISA::htog(argc); 617 618 //Write out the mysterious 0 619 uint64_t mysterious_zero = 0; 620 initVirtMem->writeBlob(mysterious_base, 621 (uint8_t*)&mysterious_zero, mysterious_size); 622 623 //Write the file name 624 initVirtMem->writeString(file_name_base, filename.c_str()); 625 626 //Copy the aux stuff 627 for(int x = 0; x < auxv.size(); x++) 628 { 629 initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize, 630 (uint8_t*)&(auxv[x].a_type), intSize); 631 initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize, 632 (uint8_t*)&(auxv[x].a_val), intSize); 633 } 634 //Write out the terminating zeroed auxilliary vector 635 const uint64_t zero = 0; 636 initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(), 637 (uint8_t*)&zero, 2 * intSize); 638 639 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem); 640 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem); 641 642 initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize); 643 644 //Stuff the trap handlers into the processes address space. 645 //Since the stack grows down and is the highest area in the processes 646 //address space, we can put stuff above it and stay out of the way. 647 int fillSize = sizeof(MachInst) * numFillInsts; 648 int spillSize = sizeof(MachInst) * numSpillInsts; 649 fillStart = stack_base; 650 spillStart = fillStart + fillSize; 651 initVirtMem->writeBlob(fillStart, (uint8_t*)fillHandler32, fillSize); 652 initVirtMem->writeBlob(spillStart, (uint8_t*)spillHandler32, spillSize); 653 654 //Set up the thread context to start running the process 655 //assert(NumArgumentRegs >= 2); 656 //threadContexts[0]->setIntReg(ArgumentReg[0], argc); 657 //threadContexts[0]->setIntReg(ArgumentReg[1], argv_array_base); 658 threadContexts[0]->setIntReg(StackPointerReg, stack_min); 659 660 uint32_t prog_entry = objFile->entryPoint(); 661 threadContexts[0]->setPC(prog_entry); 662 threadContexts[0]->setNextPC(prog_entry + sizeof(MachInst)); 663 threadContexts[0]->setNextNPC(prog_entry + (2 * sizeof(MachInst))); 664 665 //Align the "stack_min" to a page boundary. 666 stack_min = roundDown(stack_min, pageSize); 667 668// num_processes++; 669} 670 671void Sparc32LiveProcess::flushWindows(ThreadContext *tc) 672{ 673 IntReg Cansave = tc->readIntReg(NumIntArchRegs + 3); 674 IntReg Canrestore = tc->readIntReg(NumIntArchRegs + 4); 675 IntReg Otherwin = tc->readIntReg(NumIntArchRegs + 6); 676 MiscReg CWP = tc->readMiscReg(MISCREG_CWP); 677 MiscReg origCWP = CWP; 678 CWP = (CWP + Cansave + 2) % NWindows; 679 while(NWindows - 2 - Cansave != 0) 680 { 681 if (Otherwin) { 682 panic("Otherwin non-zero.\n"); 683 } else { 684 tc->setMiscReg(MISCREG_CWP, CWP); 685 //Do the stores 686 IntReg sp = tc->readIntReg(StackPointerReg); 687 for (int index = 16; index < 32; index++) { 688 IntReg regVal = tc->readIntReg(index); 689 regVal = htog(regVal); 690 if (!tc->getMemPort()->tryWriteBlob( 691 sp + (index - 16) * 4, (uint8_t *)®Val, 4)) { 692 warn("Failed to save register to the stack when " 693 "flushing windows.\n"); 694 } 695 } 696 Canrestore--; 697 Cansave++; 698 CWP = (CWP + 1) % NWindows; 699 } 700 } 701 tc->setIntReg(NumIntArchRegs + 3, Cansave); 702 tc->setIntReg(NumIntArchRegs + 4, Canrestore); 703 tc->setMiscReg(MISCREG_CWP, origCWP); 704} 705 706void Sparc64LiveProcess::flushWindows(ThreadContext *tc) 707{ 708 IntReg Cansave = tc->readIntReg(NumIntArchRegs + 3); 709 IntReg Canrestore = tc->readIntReg(NumIntArchRegs + 4); 710 IntReg Otherwin = tc->readIntReg(NumIntArchRegs + 6); 711 MiscReg CWP = tc->readMiscReg(MISCREG_CWP); 712 MiscReg origCWP = CWP; 713 CWP = (CWP + Cansave + 2) % NWindows; 714 while(NWindows - 2 - Cansave != 0) 715 { 716 if (Otherwin) { 717 panic("Otherwin non-zero.\n"); 718 } else { 719 tc->setMiscReg(MISCREG_CWP, CWP); 720 //Do the stores 721 IntReg sp = tc->readIntReg(StackPointerReg); 722 for (int index = 16; index < 32; index++) { 723 IntReg regVal = tc->readIntReg(index); 724 regVal = htog(regVal); 725 if (!tc->getMemPort()->tryWriteBlob( 726 sp + 2047 + (index - 16) * 8, (uint8_t *)®Val, 8)) { 727 warn("Failed to save register to the stack when " 728 "flushing windows.\n"); 729 } 730 } 731 Canrestore--; 732 Cansave++; 733 CWP = (CWP + 1) % NWindows; 734 } 735 } 736 tc->setIntReg(NumIntArchRegs + 3, Cansave); 737 tc->setIntReg(NumIntArchRegs + 4, Canrestore); 738 tc->setMiscReg(MISCREG_CWP, origCWP); 739} 740