process.cc revision 5958
112855Sgabeblack@google.com/* 212855Sgabeblack@google.com * Copyright (c) 2003-2006 The Regents of The University of Michigan 312855Sgabeblack@google.com * All rights reserved. 412855Sgabeblack@google.com * 512855Sgabeblack@google.com * Redistribution and use in source and binary forms, with or without 612855Sgabeblack@google.com * modification, are permitted provided that the following conditions are 712855Sgabeblack@google.com * met: redistributions of source code must retain the above copyright 812855Sgabeblack@google.com * notice, this list of conditions and the following disclaimer; 912855Sgabeblack@google.com * redistributions in binary form must reproduce the above copyright 1012855Sgabeblack@google.com * notice, this list of conditions and the following disclaimer in the 1112855Sgabeblack@google.com * documentation and/or other materials provided with the distribution; 1212855Sgabeblack@google.com * neither the name of the copyright holders nor the names of its 1312855Sgabeblack@google.com * contributors may be used to endorse or promote products derived from 1412855Sgabeblack@google.com * this software without specific prior written permission. 1512855Sgabeblack@google.com * 1612855Sgabeblack@google.com * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 1712855Sgabeblack@google.com * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 1812855Sgabeblack@google.com * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 1912855Sgabeblack@google.com * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 2012855Sgabeblack@google.com * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 2112855Sgabeblack@google.com * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 2212855Sgabeblack@google.com * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2312855Sgabeblack@google.com * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2412855Sgabeblack@google.com * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2512855Sgabeblack@google.com * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 2612855Sgabeblack@google.com * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2712855Sgabeblack@google.com * 2812855Sgabeblack@google.com * Authors: Gabe Black 2912855Sgabeblack@google.com * Ali Saidi 3012855Sgabeblack@google.com */ 3112855Sgabeblack@google.com 3212855Sgabeblack@google.com/* 3312855Sgabeblack@google.com * Copyright (c) 2007 The Hewlett-Packard Development Company 3412855Sgabeblack@google.com * All rights reserved. 3512855Sgabeblack@google.com * 3612855Sgabeblack@google.com * Redistribution and use of this software in source and binary forms, 3712855Sgabeblack@google.com * with or without modification, are permitted provided that the 3812855Sgabeblack@google.com * following conditions are met: 3912855Sgabeblack@google.com * 4012855Sgabeblack@google.com * The software must be used only for Non-Commercial Use which means any 4112855Sgabeblack@google.com * use which is NOT directed to receiving any direct monetary 4212855Sgabeblack@google.com * compensation for, or commercial advantage from such use. Illustrative 4312855Sgabeblack@google.com * examples of non-commercial use are academic research, personal study, 4412855Sgabeblack@google.com * teaching, education and corporate research & development. 4512855Sgabeblack@google.com * Illustrative examples of commercial use are distributing products for 4612855Sgabeblack@google.com * commercial advantage and providing services using the software for 4712855Sgabeblack@google.com * commercial advantage. 4812855Sgabeblack@google.com * 4912855Sgabeblack@google.com * If you wish to use this software or functionality therein that may be 5012855Sgabeblack@google.com * covered by patents for commercial use, please contact: 5112855Sgabeblack@google.com * Director of Intellectual Property Licensing 5212855Sgabeblack@google.com * Office of Strategy and Technology 5312855Sgabeblack@google.com * Hewlett-Packard Company 5412855Sgabeblack@google.com * 1501 Page Mill Road 5512855Sgabeblack@google.com * Palo Alto, California 94304 5612855Sgabeblack@google.com * 5712855Sgabeblack@google.com * Redistributions of source code must retain the above copyright notice, 5812855Sgabeblack@google.com * this list of conditions and the following disclaimer. Redistributions 5912855Sgabeblack@google.com * in binary form must reproduce the above copyright notice, this list of 6012855Sgabeblack@google.com * conditions and the following disclaimer in the documentation and/or 6112855Sgabeblack@google.com * other materials provided with the distribution. Neither the name of 6212855Sgabeblack@google.com * the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its 6312855Sgabeblack@google.com * contributors may be used to endorse or promote products derived from 6412855Sgabeblack@google.com * this software without specific prior written permission. No right of 6512855Sgabeblack@google.com * sublicense is granted herewith. Derivatives of the software and 6612855Sgabeblack@google.com * output created using the software may be prepared, but only for 6712855Sgabeblack@google.com * Non-Commercial Uses. Derivatives of the software may be shared with 6812855Sgabeblack@google.com * others provided: (i) the others agree to abide by the list of 6912855Sgabeblack@google.com * conditions herein which includes the Non-Commercial Use restrictions; 7012855Sgabeblack@google.com * and (ii) such Derivatives of the software include the above copyright 7112855Sgabeblack@google.com * notice to acknowledge the contribution from this software where 7212855Sgabeblack@google.com * applicable, this list of conditions and the disclaimer below. 7312855Sgabeblack@google.com * 7412855Sgabeblack@google.com * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 7512855Sgabeblack@google.com * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 7612855Sgabeblack@google.com * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 7712855Sgabeblack@google.com * 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); 119 120X86LiveProcess::X86LiveProcess(LiveProcessParams * params, ObjectFile *objFile, 121 SyscallDesc *_syscallDescs, int _numSyscallDescs) : 122 LiveProcess(params, objFile), syscallDescs(_syscallDescs), 123 numSyscallDescs(_numSyscallDescs) 124{ 125 brk_point = objFile->dataBase() + objFile->dataSize() + objFile->bssSize(); 126 brk_point = roundUp(brk_point, VMPageSize); 127} 128 129X86_64LiveProcess::X86_64LiveProcess(LiveProcessParams *params, 130 ObjectFile *objFile, SyscallDesc *_syscallDescs, 131 int _numSyscallDescs) : 132 X86LiveProcess(params, objFile, _syscallDescs, _numSyscallDescs) 133{ 134 // Set up stack. On X86_64 Linux, stack goes from the top of memory 135 // downward, less the hole for the kernel address space plus one page 136 // for undertermined purposes. 137 stack_base = (Addr)0x7FFFFFFFF000ULL; 138 139 // Set pointer for next thread stack. Reserve 8M for main stack. 140 next_thread_stack_base = stack_base - (8 * 1024 * 1024); 141 142 // Set up region for mmaps. This was determined empirically and may not 143 // always be correct. 144 mmap_start = mmap_end = (Addr)0x2aaaaaaab000ULL; 145} 146 147I386LiveProcess::I386LiveProcess(LiveProcessParams *params, 148 ObjectFile *objFile, SyscallDesc *_syscallDescs, 149 int _numSyscallDescs) : 150 X86LiveProcess(params, objFile, _syscallDescs, _numSyscallDescs) 151{ 152 stack_base = (Addr)0xffffe000ULL; 153 154 // Set pointer for next thread stack. Reserve 8M for main stack. 155 next_thread_stack_base = stack_base - (8 * 1024 * 1024); 156 157 // Set up region for mmaps. This was determined empirically and may not 158 // always be correct. 159 mmap_start = mmap_end = (Addr)0xf7ffd000ULL; 160} 161 162SyscallDesc* 163X86LiveProcess::getDesc(int callnum) 164{ 165 if (callnum < 0 || callnum >= numSyscallDescs) 166 return NULL; 167 return &syscallDescs[callnum]; 168} 169 170void 171X86_64LiveProcess::startup() 172{ 173 LiveProcess::startup(); 174 175 if (checkpointRestored) 176 return; 177 178 argsInit(sizeof(uint64_t), VMPageSize); 179 180 for (int i = 0; i < contextIds.size(); i++) { 181 ThreadContext * tc = system->getThreadContext(contextIds[i]); 182 183 SegAttr dataAttr = 0; 184 dataAttr.writable = 1; 185 dataAttr.readable = 1; 186 dataAttr.expandDown = 0; 187 dataAttr.dpl = 3; 188 dataAttr.defaultSize = 0; 189 dataAttr.longMode = 1; 190 191 //Initialize the segment registers. 192 for(int seg = 0; seg < NUM_SEGMENTREGS; seg++) { 193 tc->setMiscRegNoEffect(MISCREG_SEG_BASE(seg), 0); 194 tc->setMiscRegNoEffect(MISCREG_SEG_EFF_BASE(seg), 0); 195 tc->setMiscRegNoEffect(MISCREG_SEG_ATTR(seg), dataAttr); 196 } 197 198 SegAttr csAttr = 0; 199 csAttr.writable = 0; 200 csAttr.readable = 1; 201 csAttr.expandDown = 0; 202 csAttr.dpl = 3; 203 csAttr.defaultSize = 0; 204 csAttr.longMode = 1; 205 206 tc->setMiscRegNoEffect(MISCREG_CS_ATTR, csAttr); 207 208 //Set up the registers that describe the operating mode. 209 CR0 cr0 = 0; 210 cr0.pg = 1; // Turn on paging. 211 cr0.cd = 0; // Don't disable caching. 212 cr0.nw = 0; // This is bit is defined to be ignored. 213 cr0.am = 0; // No alignment checking 214 cr0.wp = 0; // Supervisor mode can write read only pages 215 cr0.ne = 1; 216 cr0.et = 1; // This should always be 1 217 cr0.ts = 0; // We don't do task switching, so causing fp exceptions 218 // would be pointless. 219 cr0.em = 0; // Allow x87 instructions to execute natively. 220 cr0.mp = 1; // This doesn't really matter, but the manual suggests 221 // setting it to one. 222 cr0.pe = 1; // We're definitely in protected mode. 223 tc->setMiscReg(MISCREG_CR0, cr0); 224 225 Efer efer = 0; 226 efer.sce = 1; // Enable system call extensions. 227 efer.lme = 1; // Enable long mode. 228 efer.lma = 1; // Activate long mode. 229 efer.nxe = 1; // Enable nx support. 230 efer.svme = 0; // Disable svm support for now. It isn't implemented. 231 efer.ffxsr = 1; // Turn on fast fxsave and fxrstor. 232 tc->setMiscReg(MISCREG_EFER, efer); 233 } 234} 235 236void 237I386LiveProcess::startup() 238{ 239 LiveProcess::startup(); 240 241 if (checkpointRestored) 242 return; 243 244 argsInit(sizeof(uint32_t), VMPageSize); 245 246 for (int i = 0; i < contextIds.size(); i++) { 247 ThreadContext * tc = system->getThreadContext(contextIds[i]); 248 249 SegAttr dataAttr = 0; 250 dataAttr.writable = 1; 251 dataAttr.readable = 1; 252 dataAttr.expandDown = 0; 253 dataAttr.dpl = 3; 254 dataAttr.defaultSize = 1; 255 dataAttr.longMode = 0; 256 257 //Initialize the segment registers. 258 for(int seg = 0; seg < NUM_SEGMENTREGS; seg++) { 259 tc->setMiscRegNoEffect(MISCREG_SEG_BASE(seg), 0); 260 tc->setMiscRegNoEffect(MISCREG_SEG_EFF_BASE(seg), 0); 261 tc->setMiscRegNoEffect(MISCREG_SEG_ATTR(seg), dataAttr); 262 tc->setMiscRegNoEffect(MISCREG_SEG_SEL(seg), 0xB); 263 } 264 265 SegAttr csAttr = 0; 266 csAttr.writable = 0; 267 csAttr.readable = 1; 268 csAttr.expandDown = 0; 269 csAttr.dpl = 3; 270 csAttr.defaultSize = 1; 271 csAttr.longMode = 0; 272 273 tc->setMiscRegNoEffect(MISCREG_CS_ATTR, csAttr); 274 275 //Set up the registers that describe the operating mode. 276 CR0 cr0 = 0; 277 cr0.pg = 1; // Turn on paging. 278 cr0.cd = 0; // Don't disable caching. 279 cr0.nw = 0; // This is bit is defined to be ignored. 280 cr0.am = 0; // No alignment checking 281 cr0.wp = 0; // Supervisor mode can write read only pages 282 cr0.ne = 1; 283 cr0.et = 1; // This should always be 1 284 cr0.ts = 0; // We don't do task switching, so causing fp exceptions 285 // would be pointless. 286 cr0.em = 0; // Allow x87 instructions to execute natively. 287 cr0.mp = 1; // This doesn't really matter, but the manual suggests 288 // setting it to one. 289 cr0.pe = 1; // We're definitely in protected mode. 290 tc->setMiscReg(MISCREG_CR0, cr0); 291 292 Efer efer = 0; 293 efer.sce = 1; // Enable system call extensions. 294 efer.lme = 1; // Enable long mode. 295 efer.lma = 0; // Deactivate long mode. 296 efer.nxe = 1; // Enable nx support. 297 efer.svme = 0; // Disable svm support for now. It isn't implemented. 298 efer.ffxsr = 1; // Turn on fast fxsave and fxrstor. 299 tc->setMiscReg(MISCREG_EFER, efer); 300 } 301} 302 303template<class IntType> 304void 305X86LiveProcess::argsInit(int pageSize) 306{ 307 int intSize = sizeof(IntType); 308 309 typedef AuxVector<IntType> auxv_t; 310 std::vector<auxv_t> auxv; 311 312 string filename; 313 if(argv.size() < 1) 314 filename = ""; 315 else 316 filename = argv[0]; 317 318 //We want 16 byte alignment 319 uint64_t align = 16; 320 321 // load object file into target memory 322 objFile->loadSections(initVirtMem); 323 324 enum X86CpuFeature { 325 X86_OnboardFPU = 1 << 0, 326 X86_VirtualModeExtensions = 1 << 1, 327 X86_DebuggingExtensions = 1 << 2, 328 X86_PageSizeExtensions = 1 << 3, 329 330 X86_TimeStampCounter = 1 << 4, 331 X86_ModelSpecificRegisters = 1 << 5, 332 X86_PhysicalAddressExtensions = 1 << 6, 333 X86_MachineCheckExtensions = 1 << 7, 334 335 X86_CMPXCHG8Instruction = 1 << 8, 336 X86_OnboardAPIC = 1 << 9, 337 X86_SYSENTER_SYSEXIT = 1 << 11, 338 339 X86_MemoryTypeRangeRegisters = 1 << 12, 340 X86_PageGlobalEnable = 1 << 13, 341 X86_MachineCheckArchitecture = 1 << 14, 342 X86_CMOVInstruction = 1 << 15, 343 344 X86_PageAttributeTable = 1 << 16, 345 X86_36BitPSEs = 1 << 17, 346 X86_ProcessorSerialNumber = 1 << 18, 347 X86_CLFLUSHInstruction = 1 << 19, 348 349 X86_DebugTraceStore = 1 << 21, 350 X86_ACPIViaMSR = 1 << 22, 351 X86_MultimediaExtensions = 1 << 23, 352 353 X86_FXSAVE_FXRSTOR = 1 << 24, 354 X86_StreamingSIMDExtensions = 1 << 25, 355 X86_StreamingSIMDExtensions2 = 1 << 26, 356 X86_CPUSelfSnoop = 1 << 27, 357 358 X86_HyperThreading = 1 << 28, 359 X86_AutomaticClockControl = 1 << 29, 360 X86_IA64Processor = 1 << 30 361 }; 362 363 //Setup the auxilliary vectors. These will already have endian conversion. 364 //Auxilliary vectors are loaded only for elf formatted executables. 365 ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile); 366 if(elfObject) 367 { 368 uint64_t features = 369 X86_OnboardFPU | 370 X86_VirtualModeExtensions | 371 X86_DebuggingExtensions | 372 X86_PageSizeExtensions | 373 X86_TimeStampCounter | 374 X86_ModelSpecificRegisters | 375 X86_PhysicalAddressExtensions | 376 X86_MachineCheckExtensions | 377 X86_CMPXCHG8Instruction | 378 X86_OnboardAPIC | 379 X86_SYSENTER_SYSEXIT | 380 X86_MemoryTypeRangeRegisters | 381 X86_PageGlobalEnable | 382 X86_MachineCheckArchitecture | 383 X86_CMOVInstruction | 384 X86_PageAttributeTable | 385 X86_36BitPSEs | 386// X86_ProcessorSerialNumber | 387 X86_CLFLUSHInstruction | 388// X86_DebugTraceStore | 389// X86_ACPIViaMSR | 390 X86_MultimediaExtensions | 391 X86_FXSAVE_FXRSTOR | 392 X86_StreamingSIMDExtensions | 393 X86_StreamingSIMDExtensions2 | 394// X86_CPUSelfSnoop | 395// X86_HyperThreading | 396// X86_AutomaticClockControl | 397// X86_IA64Processor | 398 0; 399 400 //Bits which describe the system hardware capabilities 401 //XXX Figure out what these should be 402 auxv.push_back(auxv_t(M5_AT_HWCAP, features)); 403 //The system page size 404 auxv.push_back(auxv_t(M5_AT_PAGESZ, X86ISA::VMPageSize)); 405 //Frequency at which times() increments 406 auxv.push_back(auxv_t(M5_AT_CLKTCK, 100)); 407 // For statically linked executables, this is the virtual address of the 408 // program header tables if they appear in the executable image 409 auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable())); 410 // This is the size of a program header entry from the elf file. 411 auxv.push_back(auxv_t(M5_AT_PHENT, elfObject->programHeaderSize())); 412 // This is the number of program headers from the original elf file. 413 auxv.push_back(auxv_t(M5_AT_PHNUM, elfObject->programHeaderCount())); 414 //Defined to be 100 in the kernel source. 415 //This is the address of the elf "interpreter", It should be set 416 //to 0 for regular executables. It should be something else 417 //(not sure what) for dynamic libraries. 418 auxv.push_back(auxv_t(M5_AT_BASE, 0)); 419 420 //XXX Figure out what this should be. 421 auxv.push_back(auxv_t(M5_AT_FLAGS, 0)); 422 //The entry point to the program 423 auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint())); 424 //Different user and group IDs 425 auxv.push_back(auxv_t(M5_AT_UID, uid())); 426 auxv.push_back(auxv_t(M5_AT_EUID, euid())); 427 auxv.push_back(auxv_t(M5_AT_GID, gid())); 428 auxv.push_back(auxv_t(M5_AT_EGID, egid())); 429 //Whether to enable "secure mode" in the executable 430 auxv.push_back(auxv_t(M5_AT_SECURE, 0)); 431 //The string "x86_64" with unknown meaning 432 auxv.push_back(auxv_t(M5_AT_PLATFORM, 0)); 433 } 434 435 //Figure out how big the initial stack needs to be 436 437 // A sentry NULL void pointer at the top of the stack. 438 int sentry_size = intSize; 439 440 //This is the name of the file which is present on the initial stack 441 //It's purpose is to let the user space linker examine the original file. 442 int file_name_size = filename.size() + 1; 443 444 string platform = "x86_64"; 445 int aux_data_size = platform.size() + 1; 446 447 int env_data_size = 0; 448 for (int i = 0; i < envp.size(); ++i) { 449 env_data_size += envp[i].size() + 1; 450 } 451 int arg_data_size = 0; 452 for (int i = 0; i < argv.size(); ++i) { 453 arg_data_size += argv[i].size() + 1; 454 } 455 456 //The info_block needs to be padded so it's size is a multiple of the 457 //alignment mask. Also, it appears that there needs to be at least some 458 //padding, so if the size is already a multiple, we need to increase it 459 //anyway. 460 int base_info_block_size = 461 sentry_size + file_name_size + env_data_size + arg_data_size; 462 463 int info_block_size = roundUp(base_info_block_size, align); 464 465 int info_block_padding = info_block_size - base_info_block_size; 466 467 //Each auxilliary vector is two 8 byte words 468 int aux_array_size = intSize * 2 * (auxv.size() + 1); 469 470 int envp_array_size = intSize * (envp.size() + 1); 471 int argv_array_size = intSize * (argv.size() + 1); 472 473 int argc_size = intSize; 474 475 //Figure out the size of the contents of the actual initial frame 476 int frame_size = 477 aux_array_size + 478 envp_array_size + 479 argv_array_size + 480 argc_size; 481 482 //There needs to be padding after the auxiliary vector data so that the 483 //very bottom of the stack is aligned properly. 484 int partial_size = frame_size + aux_data_size; 485 int aligned_partial_size = roundUp(partial_size, align); 486 int aux_padding = aligned_partial_size - partial_size; 487 488 int space_needed = 489 info_block_size + 490 aux_data_size + 491 aux_padding + 492 frame_size; 493 494 stack_min = stack_base - space_needed; 495 stack_min = roundDown(stack_min, align); 496 stack_size = stack_base - stack_min; 497 498 // map memory 499 pTable->allocate(roundDown(stack_min, pageSize), 500 roundUp(stack_size, pageSize)); 501 502 // map out initial stack contents 503 IntType sentry_base = stack_base - sentry_size; 504 IntType file_name_base = sentry_base - file_name_size; 505 IntType env_data_base = file_name_base - env_data_size; 506 IntType arg_data_base = env_data_base - arg_data_size; 507 IntType aux_data_base = arg_data_base - info_block_padding - aux_data_size; 508 IntType auxv_array_base = aux_data_base - aux_array_size - aux_padding; 509 IntType envp_array_base = auxv_array_base - envp_array_size; 510 IntType argv_array_base = envp_array_base - argv_array_size; 511 IntType argc_base = argv_array_base - argc_size; 512 513 DPRINTF(Stack, "The addresses of items on the initial stack:\n"); 514 DPRINTF(Stack, "0x%x - file name\n", file_name_base); 515 DPRINTF(Stack, "0x%x - env data\n", env_data_base); 516 DPRINTF(Stack, "0x%x - arg data\n", arg_data_base); 517 DPRINTF(Stack, "0x%x - aux data\n", aux_data_base); 518 DPRINTF(Stack, "0x%x - auxv array\n", auxv_array_base); 519 DPRINTF(Stack, "0x%x - envp array\n", envp_array_base); 520 DPRINTF(Stack, "0x%x - argv array\n", argv_array_base); 521 DPRINTF(Stack, "0x%x - argc \n", argc_base); 522 DPRINTF(Stack, "0x%x - stack min\n", stack_min); 523 524 // write contents to stack 525 526 // figure out argc 527 IntType argc = argv.size(); 528 IntType guestArgc = X86ISA::htog(argc); 529 530 //Write out the sentry void * 531 IntType sentry_NULL = 0; 532 initVirtMem->writeBlob(sentry_base, 533 (uint8_t*)&sentry_NULL, sentry_size); 534 535 //Write the file name 536 initVirtMem->writeString(file_name_base, filename.c_str()); 537 538 //Fix up the aux vector which points to the "platform" string 539 assert(auxv[auxv.size() - 1].a_type = M5_AT_PLATFORM); 540 auxv[auxv.size() - 1].a_val = aux_data_base; 541 542 //Copy the aux stuff 543 for(int x = 0; x < auxv.size(); x++) 544 { 545 initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize, 546 (uint8_t*)&(auxv[x].a_type), intSize); 547 initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize, 548 (uint8_t*)&(auxv[x].a_val), intSize); 549 } 550 //Write out the terminating zeroed auxilliary vector 551 const uint64_t zero = 0; 552 initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(), 553 (uint8_t*)&zero, 2 * intSize); 554 555 initVirtMem->writeString(aux_data_base, platform.c_str()); 556 557 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem); 558 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem); 559 560 initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize); 561 562 ThreadContext *tc = system->getThreadContext(contextIds[0]); 563 //Set the stack pointer register 564 tc->setIntReg(StackPointerReg, stack_min); 565 566 Addr prog_entry = objFile->entryPoint(); 567 // There doesn't need to be any segment base added in since we're dealing 568 // with the flat segmentation model. 569 tc->setPC(prog_entry); 570 tc->setNextPC(prog_entry + sizeof(MachInst)); 571 572 //Align the "stack_min" to a page boundary. 573 stack_min = roundDown(stack_min, pageSize); 574 575// num_processes++; 576} 577 578void 579X86_64LiveProcess::argsInit(int intSize, int pageSize) 580{ 581 X86LiveProcess::argsInit<uint64_t>(pageSize); 582} 583 584void 585I386LiveProcess::argsInit(int intSize, int pageSize) 586{ 587 X86LiveProcess::argsInit<uint32_t>(pageSize); 588} 589 590void 591X86LiveProcess::setSyscallReturn(ThreadContext *tc, SyscallReturn return_value) 592{ 593 tc->setIntReg(INTREG_RAX, return_value.value()); 594} 595 596X86ISA::IntReg 597X86_64LiveProcess::getSyscallArg(ThreadContext *tc, int i) 598{ 599 assert(i < NumArgumentRegs); 600 return tc->readIntReg(ArgumentReg[i]); 601} 602 603void 604X86_64LiveProcess::setSyscallArg(ThreadContext *tc, int i, X86ISA::IntReg val) 605{ 606 assert(i < NumArgumentRegs); 607 return tc->setIntReg(ArgumentReg[i], val); 608} 609 610X86ISA::IntReg 611I386LiveProcess::getSyscallArg(ThreadContext *tc, int i) 612{ 613 panic("32 bit getSyscallArg not implemented.\n"); 614} 615 616void 617I386LiveProcess::setSyscallArg(ThreadContext *tc, int i, X86ISA::IntReg val) 618{ 619 panic("32 bit setSyscallArg not implemented.\n"); 620} 621