process.cc revision 5962:e831b4360cfe
1/* 2 * Copyright (c) 2003-2006 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/* 33 * Copyright (c) 2007 The Hewlett-Packard Development Company 34 * All rights reserved. 35 * 36 * Redistribution and use of this software in source and binary forms, 37 * with or without modification, are permitted provided that the 38 * following conditions are met: 39 * 40 * The software must be used only for Non-Commercial Use which means any 41 * use which is NOT directed to receiving any direct monetary 42 * compensation for, or commercial advantage from such use. Illustrative 43 * examples of non-commercial use are academic research, personal study, 44 * teaching, education and corporate research & development. 45 * Illustrative examples of commercial use are distributing products for 46 * commercial advantage and providing services using the software for 47 * commercial advantage. 48 * 49 * If you wish to use this software or functionality therein that may be 50 * covered by patents for commercial use, please contact: 51 * Director of Intellectual Property Licensing 52 * Office of Strategy and Technology 53 * Hewlett-Packard Company 54 * 1501 Page Mill Road 55 * Palo Alto, California 94304 56 * 57 * Redistributions of source code must retain the above copyright notice, 58 * this list of conditions and the following disclaimer. Redistributions 59 * in binary form must reproduce the above copyright notice, this list of 60 * conditions and the following disclaimer in the documentation and/or 61 * other materials provided with the distribution. Neither the name of 62 * the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its 63 * contributors may be used to endorse or promote products derived from 64 * this software without specific prior written permission. No right of 65 * sublicense is granted herewith. Derivatives of the software and 66 * output created using the software may be prepared, but only for 67 * Non-Commercial Uses. Derivatives of the software may be shared with 68 * others provided: (i) the others agree to abide by the list of 69 * conditions herein which includes the Non-Commercial Use restrictions; 70 * and (ii) such Derivatives of the software include the above copyright 71 * notice to acknowledge the contribution from this software where 72 * applicable, this list of conditions and the disclaimer below. 73 * 74 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 75 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 76 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 77 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 78 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 79 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 80 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 81 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 82 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 83 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 84 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 85 * 86 * Authors: Gabe Black 87 */ 88 89#include "arch/x86/isa_traits.hh" 90#include "arch/x86/process.hh" 91#include "arch/x86/segmentregs.hh" 92#include "arch/x86/types.hh" 93#include "base/loader/object_file.hh" 94#include "base/loader/elf_object.hh" 95#include "base/misc.hh" 96#include "base/trace.hh" 97#include "cpu/thread_context.hh" 98#include "mem/page_table.hh" 99#include "mem/translating_port.hh" 100#include "sim/process_impl.hh" 101#include "sim/syscall_emul.hh" 102#include "sim/system.hh" 103 104using namespace std; 105using namespace X86ISA; 106 107static const int ReturnValueReg = INTREG_RAX; 108static const int ArgumentReg[] = { 109 INTREG_RDI, 110 INTREG_RSI, 111 INTREG_RDX, 112 //This argument register is r10 for syscalls and rcx for C. 113 INTREG_R10W, 114 //INTREG_RCX, 115 INTREG_R8W, 116 INTREG_R9W 117}; 118static const int NumArgumentRegs = sizeof(ArgumentReg) / sizeof(const int); 119static const int ArgumentReg32[] = { 120 INTREG_EBX, 121 INTREG_ECX, 122 INTREG_EDX, 123 INTREG_ESI, 124 INTREG_EDI, 125}; 126static const int NumArgumentRegs32 = sizeof(ArgumentReg) / sizeof(const int); 127 128X86LiveProcess::X86LiveProcess(LiveProcessParams * params, ObjectFile *objFile, 129 SyscallDesc *_syscallDescs, int _numSyscallDescs) : 130 LiveProcess(params, objFile), syscallDescs(_syscallDescs), 131 numSyscallDescs(_numSyscallDescs) 132{ 133 brk_point = objFile->dataBase() + objFile->dataSize() + objFile->bssSize(); 134 brk_point = roundUp(brk_point, VMPageSize); 135} 136 137X86_64LiveProcess::X86_64LiveProcess(LiveProcessParams *params, 138 ObjectFile *objFile, SyscallDesc *_syscallDescs, 139 int _numSyscallDescs) : 140 X86LiveProcess(params, objFile, _syscallDescs, _numSyscallDescs) 141{ 142 // Set up stack. On X86_64 Linux, stack goes from the top of memory 143 // downward, less the hole for the kernel address space plus one page 144 // for undertermined purposes. 145 stack_base = (Addr)0x7FFFFFFFF000ULL; 146 147 // Set pointer for next thread stack. Reserve 8M for main stack. 148 next_thread_stack_base = stack_base - (8 * 1024 * 1024); 149 150 // Set up region for mmaps. This was determined empirically and may not 151 // always be correct. 152 mmap_start = mmap_end = (Addr)0x2aaaaaaab000ULL; 153} 154 155I386LiveProcess::I386LiveProcess(LiveProcessParams *params, 156 ObjectFile *objFile, SyscallDesc *_syscallDescs, 157 int _numSyscallDescs) : 158 X86LiveProcess(params, objFile, _syscallDescs, _numSyscallDescs) 159{ 160 stack_base = (Addr)0xffffe000ULL; 161 162 // Set pointer for next thread stack. Reserve 8M for main stack. 163 next_thread_stack_base = stack_base - (8 * 1024 * 1024); 164 165 // Set up region for mmaps. This was determined empirically and may not 166 // always be correct. 167 mmap_start = mmap_end = (Addr)0xf7ffd000ULL; 168} 169 170SyscallDesc* 171X86LiveProcess::getDesc(int callnum) 172{ 173 if (callnum < 0 || callnum >= numSyscallDescs) 174 return NULL; 175 return &syscallDescs[callnum]; 176} 177 178void 179X86_64LiveProcess::startup() 180{ 181 LiveProcess::startup(); 182 183 if (checkpointRestored) 184 return; 185 186 argsInit(sizeof(uint64_t), VMPageSize); 187 188 for (int i = 0; i < contextIds.size(); i++) { 189 ThreadContext * tc = system->getThreadContext(contextIds[i]); 190 191 SegAttr dataAttr = 0; 192 dataAttr.writable = 1; 193 dataAttr.readable = 1; 194 dataAttr.expandDown = 0; 195 dataAttr.dpl = 3; 196 dataAttr.defaultSize = 0; 197 dataAttr.longMode = 1; 198 199 //Initialize the segment registers. 200 for(int seg = 0; seg < NUM_SEGMENTREGS; seg++) { 201 tc->setMiscRegNoEffect(MISCREG_SEG_BASE(seg), 0); 202 tc->setMiscRegNoEffect(MISCREG_SEG_EFF_BASE(seg), 0); 203 tc->setMiscRegNoEffect(MISCREG_SEG_ATTR(seg), dataAttr); 204 } 205 206 SegAttr csAttr = 0; 207 csAttr.writable = 0; 208 csAttr.readable = 1; 209 csAttr.expandDown = 0; 210 csAttr.dpl = 3; 211 csAttr.defaultSize = 0; 212 csAttr.longMode = 1; 213 214 tc->setMiscRegNoEffect(MISCREG_CS_ATTR, csAttr); 215 216 //Set up the registers that describe the operating mode. 217 CR0 cr0 = 0; 218 cr0.pg = 1; // Turn on paging. 219 cr0.cd = 0; // Don't disable caching. 220 cr0.nw = 0; // This is bit is defined to be ignored. 221 cr0.am = 0; // No alignment checking 222 cr0.wp = 0; // Supervisor mode can write read only pages 223 cr0.ne = 1; 224 cr0.et = 1; // This should always be 1 225 cr0.ts = 0; // We don't do task switching, so causing fp exceptions 226 // would be pointless. 227 cr0.em = 0; // Allow x87 instructions to execute natively. 228 cr0.mp = 1; // This doesn't really matter, but the manual suggests 229 // setting it to one. 230 cr0.pe = 1; // We're definitely in protected mode. 231 tc->setMiscReg(MISCREG_CR0, cr0); 232 233 Efer efer = 0; 234 efer.sce = 1; // Enable system call extensions. 235 efer.lme = 1; // Enable long mode. 236 efer.lma = 1; // Activate long mode. 237 efer.nxe = 1; // Enable nx support. 238 efer.svme = 0; // Disable svm support for now. It isn't implemented. 239 efer.ffxsr = 1; // Turn on fast fxsave and fxrstor. 240 tc->setMiscReg(MISCREG_EFER, efer); 241 } 242} 243 244void 245I386LiveProcess::startup() 246{ 247 LiveProcess::startup(); 248 249 if (checkpointRestored) 250 return; 251 252 argsInit(sizeof(uint32_t), VMPageSize); 253 254 /* 255 * Set up a GDT for this process. The whole GDT wouldn't really be for 256 * this process, but the only parts we care about are. 257 */ 258 _gdtStart = stack_base; 259 _gdtSize = VMPageSize; 260 pTable->allocate(_gdtStart, _gdtSize); 261 uint64_t zero = 0; 262 assert(_gdtSize % sizeof(zero) == 0); 263 for (Addr gdtCurrent = _gdtStart; 264 gdtCurrent < _gdtStart + _gdtSize; gdtCurrent += sizeof(zero)) { 265 initVirtMem->write(gdtCurrent, zero); 266 } 267 268 for (int i = 0; i < contextIds.size(); i++) { 269 ThreadContext * tc = system->getThreadContext(contextIds[i]); 270 271 SegAttr dataAttr = 0; 272 dataAttr.writable = 1; 273 dataAttr.readable = 1; 274 dataAttr.expandDown = 0; 275 dataAttr.dpl = 3; 276 dataAttr.defaultSize = 1; 277 dataAttr.longMode = 0; 278 279 //Initialize the segment registers. 280 for(int seg = 0; seg < NUM_SEGMENTREGS; seg++) { 281 tc->setMiscRegNoEffect(MISCREG_SEG_BASE(seg), 0); 282 tc->setMiscRegNoEffect(MISCREG_SEG_EFF_BASE(seg), 0); 283 tc->setMiscRegNoEffect(MISCREG_SEG_ATTR(seg), dataAttr); 284 tc->setMiscRegNoEffect(MISCREG_SEG_SEL(seg), 0xB); 285 tc->setMiscRegNoEffect(MISCREG_SEG_LIMIT(seg), (uint32_t)(-1)); 286 } 287 288 SegAttr csAttr = 0; 289 csAttr.writable = 0; 290 csAttr.readable = 1; 291 csAttr.expandDown = 0; 292 csAttr.dpl = 3; 293 csAttr.defaultSize = 1; 294 csAttr.longMode = 0; 295 296 tc->setMiscRegNoEffect(MISCREG_CS_ATTR, csAttr); 297 298 tc->setMiscRegNoEffect(MISCREG_TSG_BASE, _gdtStart); 299 tc->setMiscRegNoEffect(MISCREG_TSG_EFF_BASE, _gdtStart); 300 tc->setMiscRegNoEffect(MISCREG_TSG_LIMIT, _gdtStart + _gdtSize - 1); 301 302 //Set up the registers that describe the operating mode. 303 CR0 cr0 = 0; 304 cr0.pg = 1; // Turn on paging. 305 cr0.cd = 0; // Don't disable caching. 306 cr0.nw = 0; // This is bit is defined to be ignored. 307 cr0.am = 0; // No alignment checking 308 cr0.wp = 0; // Supervisor mode can write read only pages 309 cr0.ne = 1; 310 cr0.et = 1; // This should always be 1 311 cr0.ts = 0; // We don't do task switching, so causing fp exceptions 312 // would be pointless. 313 cr0.em = 0; // Allow x87 instructions to execute natively. 314 cr0.mp = 1; // This doesn't really matter, but the manual suggests 315 // setting it to one. 316 cr0.pe = 1; // We're definitely in protected mode. 317 tc->setMiscReg(MISCREG_CR0, cr0); 318 319 Efer efer = 0; 320 efer.sce = 1; // Enable system call extensions. 321 efer.lme = 1; // Enable long mode. 322 efer.lma = 0; // Deactivate long mode. 323 efer.nxe = 1; // Enable nx support. 324 efer.svme = 0; // Disable svm support for now. It isn't implemented. 325 efer.ffxsr = 1; // Turn on fast fxsave and fxrstor. 326 tc->setMiscReg(MISCREG_EFER, efer); 327 } 328} 329 330template<class IntType> 331void 332X86LiveProcess::argsInit(int pageSize) 333{ 334 int intSize = sizeof(IntType); 335 336 typedef AuxVector<IntType> auxv_t; 337 std::vector<auxv_t> auxv; 338 339 string filename; 340 if(argv.size() < 1) 341 filename = ""; 342 else 343 filename = argv[0]; 344 345 //We want 16 byte alignment 346 uint64_t align = 16; 347 348 // load object file into target memory 349 objFile->loadSections(initVirtMem); 350 351 enum X86CpuFeature { 352 X86_OnboardFPU = 1 << 0, 353 X86_VirtualModeExtensions = 1 << 1, 354 X86_DebuggingExtensions = 1 << 2, 355 X86_PageSizeExtensions = 1 << 3, 356 357 X86_TimeStampCounter = 1 << 4, 358 X86_ModelSpecificRegisters = 1 << 5, 359 X86_PhysicalAddressExtensions = 1 << 6, 360 X86_MachineCheckExtensions = 1 << 7, 361 362 X86_CMPXCHG8Instruction = 1 << 8, 363 X86_OnboardAPIC = 1 << 9, 364 X86_SYSENTER_SYSEXIT = 1 << 11, 365 366 X86_MemoryTypeRangeRegisters = 1 << 12, 367 X86_PageGlobalEnable = 1 << 13, 368 X86_MachineCheckArchitecture = 1 << 14, 369 X86_CMOVInstruction = 1 << 15, 370 371 X86_PageAttributeTable = 1 << 16, 372 X86_36BitPSEs = 1 << 17, 373 X86_ProcessorSerialNumber = 1 << 18, 374 X86_CLFLUSHInstruction = 1 << 19, 375 376 X86_DebugTraceStore = 1 << 21, 377 X86_ACPIViaMSR = 1 << 22, 378 X86_MultimediaExtensions = 1 << 23, 379 380 X86_FXSAVE_FXRSTOR = 1 << 24, 381 X86_StreamingSIMDExtensions = 1 << 25, 382 X86_StreamingSIMDExtensions2 = 1 << 26, 383 X86_CPUSelfSnoop = 1 << 27, 384 385 X86_HyperThreading = 1 << 28, 386 X86_AutomaticClockControl = 1 << 29, 387 X86_IA64Processor = 1 << 30 388 }; 389 390 //Setup the auxilliary vectors. These will already have endian conversion. 391 //Auxilliary vectors are loaded only for elf formatted executables. 392 ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile); 393 if(elfObject) 394 { 395 uint64_t features = 396 X86_OnboardFPU | 397 X86_VirtualModeExtensions | 398 X86_DebuggingExtensions | 399 X86_PageSizeExtensions | 400 X86_TimeStampCounter | 401 X86_ModelSpecificRegisters | 402 X86_PhysicalAddressExtensions | 403 X86_MachineCheckExtensions | 404 X86_CMPXCHG8Instruction | 405 X86_OnboardAPIC | 406 X86_SYSENTER_SYSEXIT | 407 X86_MemoryTypeRangeRegisters | 408 X86_PageGlobalEnable | 409 X86_MachineCheckArchitecture | 410 X86_CMOVInstruction | 411 X86_PageAttributeTable | 412 X86_36BitPSEs | 413// X86_ProcessorSerialNumber | 414 X86_CLFLUSHInstruction | 415// X86_DebugTraceStore | 416// X86_ACPIViaMSR | 417 X86_MultimediaExtensions | 418 X86_FXSAVE_FXRSTOR | 419 X86_StreamingSIMDExtensions | 420 X86_StreamingSIMDExtensions2 | 421// X86_CPUSelfSnoop | 422// X86_HyperThreading | 423// X86_AutomaticClockControl | 424// X86_IA64Processor | 425 0; 426 427 //Bits which describe the system hardware capabilities 428 //XXX Figure out what these should be 429 auxv.push_back(auxv_t(M5_AT_HWCAP, features)); 430 //The system page size 431 auxv.push_back(auxv_t(M5_AT_PAGESZ, X86ISA::VMPageSize)); 432 //Frequency at which times() increments 433 auxv.push_back(auxv_t(M5_AT_CLKTCK, 100)); 434 // For statically linked executables, this is the virtual address of the 435 // program header tables if they appear in the executable image 436 auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable())); 437 // This is the size of a program header entry from the elf file. 438 auxv.push_back(auxv_t(M5_AT_PHENT, elfObject->programHeaderSize())); 439 // This is the number of program headers from the original elf file. 440 auxv.push_back(auxv_t(M5_AT_PHNUM, elfObject->programHeaderCount())); 441 //Defined to be 100 in the kernel source. 442 //This is the address of the elf "interpreter", It should be set 443 //to 0 for regular executables. It should be something else 444 //(not sure what) for dynamic libraries. 445 auxv.push_back(auxv_t(M5_AT_BASE, 0)); 446 447 //XXX Figure out what this should be. 448 auxv.push_back(auxv_t(M5_AT_FLAGS, 0)); 449 //The entry point to the program 450 auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint())); 451 //Different user and group IDs 452 auxv.push_back(auxv_t(M5_AT_UID, uid())); 453 auxv.push_back(auxv_t(M5_AT_EUID, euid())); 454 auxv.push_back(auxv_t(M5_AT_GID, gid())); 455 auxv.push_back(auxv_t(M5_AT_EGID, egid())); 456 //Whether to enable "secure mode" in the executable 457 auxv.push_back(auxv_t(M5_AT_SECURE, 0)); 458 //The string "x86_64" with unknown meaning 459 auxv.push_back(auxv_t(M5_AT_PLATFORM, 0)); 460 } 461 462 //Figure out how big the initial stack needs to be 463 464 // A sentry NULL void pointer at the top of the stack. 465 int sentry_size = intSize; 466 467 //This is the name of the file which is present on the initial stack 468 //It's purpose is to let the user space linker examine the original file. 469 int file_name_size = filename.size() + 1; 470 471 string platform = "x86_64"; 472 int aux_data_size = platform.size() + 1; 473 474 int env_data_size = 0; 475 for (int i = 0; i < envp.size(); ++i) { 476 env_data_size += envp[i].size() + 1; 477 } 478 int arg_data_size = 0; 479 for (int i = 0; i < argv.size(); ++i) { 480 arg_data_size += argv[i].size() + 1; 481 } 482 483 //The info_block needs to be padded so it's size is a multiple of the 484 //alignment mask. Also, it appears that there needs to be at least some 485 //padding, so if the size is already a multiple, we need to increase it 486 //anyway. 487 int base_info_block_size = 488 sentry_size + file_name_size + env_data_size + arg_data_size; 489 490 int info_block_size = roundUp(base_info_block_size, align); 491 492 int info_block_padding = info_block_size - base_info_block_size; 493 494 //Each auxilliary vector is two 8 byte words 495 int aux_array_size = intSize * 2 * (auxv.size() + 1); 496 497 int envp_array_size = intSize * (envp.size() + 1); 498 int argv_array_size = intSize * (argv.size() + 1); 499 500 int argc_size = intSize; 501 502 //Figure out the size of the contents of the actual initial frame 503 int frame_size = 504 aux_array_size + 505 envp_array_size + 506 argv_array_size + 507 argc_size; 508 509 //There needs to be padding after the auxiliary vector data so that the 510 //very bottom of the stack is aligned properly. 511 int partial_size = frame_size + aux_data_size; 512 int aligned_partial_size = roundUp(partial_size, align); 513 int aux_padding = aligned_partial_size - partial_size; 514 515 int space_needed = 516 info_block_size + 517 aux_data_size + 518 aux_padding + 519 frame_size; 520 521 stack_min = stack_base - space_needed; 522 stack_min = roundDown(stack_min, align); 523 stack_size = stack_base - stack_min; 524 525 // map memory 526 pTable->allocate(roundDown(stack_min, pageSize), 527 roundUp(stack_size, pageSize)); 528 529 // map out initial stack contents 530 IntType sentry_base = stack_base - sentry_size; 531 IntType file_name_base = sentry_base - file_name_size; 532 IntType env_data_base = file_name_base - env_data_size; 533 IntType arg_data_base = env_data_base - arg_data_size; 534 IntType aux_data_base = arg_data_base - info_block_padding - aux_data_size; 535 IntType auxv_array_base = aux_data_base - aux_array_size - aux_padding; 536 IntType envp_array_base = auxv_array_base - envp_array_size; 537 IntType argv_array_base = envp_array_base - argv_array_size; 538 IntType argc_base = argv_array_base - argc_size; 539 540 DPRINTF(Stack, "The addresses of items on the initial stack:\n"); 541 DPRINTF(Stack, "0x%x - file name\n", file_name_base); 542 DPRINTF(Stack, "0x%x - env data\n", env_data_base); 543 DPRINTF(Stack, "0x%x - arg data\n", arg_data_base); 544 DPRINTF(Stack, "0x%x - aux data\n", aux_data_base); 545 DPRINTF(Stack, "0x%x - auxv array\n", auxv_array_base); 546 DPRINTF(Stack, "0x%x - envp array\n", envp_array_base); 547 DPRINTF(Stack, "0x%x - argv array\n", argv_array_base); 548 DPRINTF(Stack, "0x%x - argc \n", argc_base); 549 DPRINTF(Stack, "0x%x - stack min\n", stack_min); 550 551 // write contents to stack 552 553 // figure out argc 554 IntType argc = argv.size(); 555 IntType guestArgc = X86ISA::htog(argc); 556 557 //Write out the sentry void * 558 IntType sentry_NULL = 0; 559 initVirtMem->writeBlob(sentry_base, 560 (uint8_t*)&sentry_NULL, sentry_size); 561 562 //Write the file name 563 initVirtMem->writeString(file_name_base, filename.c_str()); 564 565 //Fix up the aux vector which points to the "platform" string 566 assert(auxv[auxv.size() - 1].a_type = M5_AT_PLATFORM); 567 auxv[auxv.size() - 1].a_val = aux_data_base; 568 569 //Copy the aux stuff 570 for(int x = 0; x < auxv.size(); x++) 571 { 572 initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize, 573 (uint8_t*)&(auxv[x].a_type), intSize); 574 initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize, 575 (uint8_t*)&(auxv[x].a_val), intSize); 576 } 577 //Write out the terminating zeroed auxilliary vector 578 const uint64_t zero = 0; 579 initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(), 580 (uint8_t*)&zero, 2 * intSize); 581 582 initVirtMem->writeString(aux_data_base, platform.c_str()); 583 584 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem); 585 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem); 586 587 initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize); 588 589 ThreadContext *tc = system->getThreadContext(contextIds[0]); 590 //Set the stack pointer register 591 tc->setIntReg(StackPointerReg, stack_min); 592 593 Addr prog_entry = objFile->entryPoint(); 594 // There doesn't need to be any segment base added in since we're dealing 595 // with the flat segmentation model. 596 tc->setPC(prog_entry); 597 tc->setNextPC(prog_entry + sizeof(MachInst)); 598 599 //Align the "stack_min" to a page boundary. 600 stack_min = roundDown(stack_min, pageSize); 601 602// num_processes++; 603} 604 605void 606X86_64LiveProcess::argsInit(int intSize, int pageSize) 607{ 608 X86LiveProcess::argsInit<uint64_t>(pageSize); 609} 610 611void 612I386LiveProcess::argsInit(int intSize, int pageSize) 613{ 614 X86LiveProcess::argsInit<uint32_t>(pageSize); 615} 616 617void 618X86LiveProcess::setSyscallReturn(ThreadContext *tc, SyscallReturn return_value) 619{ 620 tc->setIntReg(INTREG_RAX, return_value.value()); 621} 622 623X86ISA::IntReg 624X86_64LiveProcess::getSyscallArg(ThreadContext *tc, int i) 625{ 626 assert(i < NumArgumentRegs); 627 return tc->readIntReg(ArgumentReg[i]); 628} 629 630void 631X86_64LiveProcess::setSyscallArg(ThreadContext *tc, int i, X86ISA::IntReg val) 632{ 633 assert(i < NumArgumentRegs); 634 return tc->setIntReg(ArgumentReg[i], val); 635} 636 637X86ISA::IntReg 638I386LiveProcess::getSyscallArg(ThreadContext *tc, int i) 639{ 640 assert(i < NumArgumentRegs32); 641 return tc->readIntReg(ArgumentReg32[i]); 642} 643 644void 645I386LiveProcess::setSyscallArg(ThreadContext *tc, int i, X86ISA::IntReg val) 646{ 647 assert(i < NumArgumentRegs); 648 return tc->setIntReg(ArgumentReg[i], val); 649} 650