process.cc revision 4777
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/types.hh" 92#include "base/loader/object_file.hh" 93#include "base/loader/elf_object.hh" 94#include "base/misc.hh" 95#include "cpu/thread_context.hh" 96#include "mem/page_table.hh" 97#include "mem/translating_port.hh" 98#include "sim/process_impl.hh" 99#include "sim/system.hh" 100 101using namespace std; 102using namespace X86ISA; 103 104M5_64_auxv_t::M5_64_auxv_t(int64_t type, int64_t val) 105{ 106 a_type = TheISA::htog(type); 107 a_val = TheISA::htog(val); 108} 109 110X86LiveProcess::X86LiveProcess(const std::string &nm, ObjectFile *objFile, 111 System *_system, int stdin_fd, int stdout_fd, int stderr_fd, 112 std::vector<std::string> &argv, std::vector<std::string> &envp, 113 const std::string &cwd, 114 uint64_t _uid, uint64_t _euid, uint64_t _gid, uint64_t _egid, 115 uint64_t _pid, uint64_t _ppid) 116 : LiveProcess(nm, objFile, _system, stdin_fd, stdout_fd, stderr_fd, 117 argv, envp, cwd, _uid, _euid, _gid, _egid, _pid, _ppid) 118{ 119 brk_point = objFile->dataBase() + objFile->dataSize() + objFile->bssSize(); 120 brk_point = roundUp(brk_point, VMPageSize); 121 122 // Set pointer for next thread stack. Reserve 8M for main stack. 123 next_thread_stack_base = stack_base - (8 * 1024 * 1024); 124 125 // Set up stack. On SPARC Linux, stack goes from the top of memory 126 // downward, less the hole for the kernel address space. 127 stack_base = (Addr)0x80000000000ULL; 128 129 // Set up region for mmaps. Tru64 seems to start just above 0 and 130 // grow up from there. 131 mmap_start = mmap_end = 0xfffff80000000000ULL; 132} 133 134void X86LiveProcess::handleTrap(int trapNum, ThreadContext *tc) 135{ 136 switch(trapNum) 137 { 138 default: 139 panic("Unimplemented trap to operating system: trap number %#x.\n", trapNum); 140 } 141} 142 143void 144X86LiveProcess::startup() 145{ 146 argsInit(sizeof(IntReg), VMPageSize); 147 148 //The AMD64 abi says that only rsp and rdx are defined at process 149 //startup. rsp will be set by argsInit, and I don't understand what 150 //rdx should be set to. The other floating point and integer registers 151 //will be zeroed by the register file constructors, but control registers 152 //should be initialized here. Since none of those are implemented, there 153 //isn't anything here. 154} 155 156void 157X86LiveProcess::argsInit(int intSize, int pageSize) 158{ 159 typedef M5_64_auxv_t auxv_t; 160 Process::startup(); 161 162 string filename; 163 if(argv.size() < 1) 164 filename = ""; 165 else 166 filename = argv[0]; 167 168 Addr alignmentMask = ~(intSize - 1); 169 170 // load object file into target memory 171 objFile->loadSections(initVirtMem); 172 173 //These are the auxilliary vector types 174 enum auxTypes 175 { 176 X86_AT_NULL = 0, 177 X86_AT_IGNORE = 1, 178 X86_AT_EXECFD = 2, 179 X86_AT_PHDR = 3, 180 X86_AT_PHENT = 4, 181 X86_AT_PHNUM = 5, 182 X86_AT_PAGESZ = 6, 183 X86_AT_BASE = 7, 184 X86_AT_FLAGS = 8, 185 X86_AT_ENTRY = 9, 186 X86_AT_NOTELF = 10, 187 X86_AT_UID = 11, 188 X86_AT_EUID = 12, 189 X86_AT_GID = 13, 190 X86_AT_EGID = 14, 191 X86_AT_PLATFORM = 15, 192 X86_AT_HWCAP = 16, 193 X86_AT_CLKTCK = 17, 194 195 X86_AT_SECURE = 13, 196 197 X86_AT_VECTOR_SIZE = 44 198 }; 199 200 //Setup the auxilliary vectors. These will already have endian conversion. 201 //Auxilliary vectors are loaded only for elf formatted executables. 202 ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile); 203 if(elfObject) 204 { 205 //Bits which describe the system hardware capabilities 206 //XXX Figure out what these should be 207 auxv.push_back(auxv_t(X86_AT_HWCAP, 0)); 208 //The system page size 209 auxv.push_back(auxv_t(X86_AT_PAGESZ, X86ISA::VMPageSize)); 210 //Frequency at which times() increments 211 auxv.push_back(auxv_t(X86_AT_CLKTCK, 100)); 212 // For statically linked executables, this is the virtual address of the 213 // program header tables if they appear in the executable image 214 auxv.push_back(auxv_t(X86_AT_PHDR, elfObject->programHeaderTable())); 215 // This is the size of a program header entry from the elf file. 216 auxv.push_back(auxv_t(X86_AT_PHENT, elfObject->programHeaderSize())); 217 // This is the number of program headers from the original elf file. 218 auxv.push_back(auxv_t(X86_AT_PHNUM, elfObject->programHeaderCount())); 219 //Defined to be 100 in the kernel source. 220 //This is the address of the elf "interpreter", It should be set 221 //to 0 for regular executables. It should be something else 222 //(not sure what) for dynamic libraries. 223 auxv.push_back(auxv_t(X86_AT_BASE, 0)); 224 225 //XXX Figure out what this should be. 226 auxv.push_back(auxv_t(X86_AT_FLAGS, 0)); 227 //The entry point to the program 228 auxv.push_back(auxv_t(X86_AT_ENTRY, objFile->entryPoint())); 229 //Different user and group IDs 230 auxv.push_back(auxv_t(X86_AT_UID, uid())); 231 auxv.push_back(auxv_t(X86_AT_EUID, euid())); 232 auxv.push_back(auxv_t(X86_AT_GID, gid())); 233 auxv.push_back(auxv_t(X86_AT_EGID, egid())); 234 //Whether to enable "secure mode" in the executable 235 auxv.push_back(auxv_t(X86_AT_SECURE, 0)); 236 //The string "x86_64" with unknown meaning 237 auxv.push_back(auxv_t(X86_AT_PLATFORM, 0)); 238 } 239 240 //Figure out how big the initial stack needs to be 241 242 // The unaccounted for 0 at the top of the stack 243 int mysterious_size = intSize; 244 245 //This is the name of the file which is present on the initial stack 246 //It's purpose is to let the user space linker examine the original file. 247 int file_name_size = filename.size() + 1; 248 249 int env_data_size = 0; 250 for (int i = 0; i < envp.size(); ++i) { 251 env_data_size += envp[i].size() + 1; 252 } 253 int arg_data_size = 0; 254 for (int i = 0; i < argv.size(); ++i) { 255 arg_data_size += argv[i].size() + 1; 256 } 257 258 //The info_block needs to be padded so it's size is a multiple of the 259 //alignment mask. Also, it appears that there needs to be at least some 260 //padding, so if the size is already a multiple, we need to increase it 261 //anyway. 262 int info_block_size = 263 (file_name_size + 264 env_data_size + 265 arg_data_size + 266 intSize) & alignmentMask; 267 268 int info_block_padding = 269 info_block_size - 270 file_name_size - 271 env_data_size - 272 arg_data_size; 273 274 //Each auxilliary vector is two 8 byte words 275 int aux_array_size = intSize * 2 * (auxv.size() + 1); 276 277 int envp_array_size = intSize * (envp.size() + 1); 278 int argv_array_size = intSize * (argv.size() + 1); 279 280 int argc_size = intSize; 281 282 int space_needed = 283 mysterious_size + 284 info_block_size + 285 aux_array_size + 286 envp_array_size + 287 argv_array_size + 288 argc_size; 289 290 stack_min = stack_base - space_needed; 291 stack_min &= alignmentMask; 292 stack_size = stack_base - stack_min; 293 294 // map memory 295 pTable->allocate(roundDown(stack_min, pageSize), 296 roundUp(stack_size, pageSize)); 297 298 // map out initial stack contents 299 Addr mysterious_base = stack_base - mysterious_size; 300 Addr file_name_base = mysterious_base - file_name_size; 301 Addr env_data_base = file_name_base - env_data_size; 302 Addr arg_data_base = env_data_base - arg_data_size; 303 Addr auxv_array_base = arg_data_base - aux_array_size - info_block_padding; 304 Addr envp_array_base = auxv_array_base - envp_array_size; 305 Addr argv_array_base = envp_array_base - argv_array_size; 306 Addr argc_base = argv_array_base - argc_size; 307 308 DPRINTF(X86, "The addresses of items on the initial stack:\n"); 309 DPRINTF(X86, "0x%x - file name\n", file_name_base); 310 DPRINTF(X86, "0x%x - env data\n", env_data_base); 311 DPRINTF(X86, "0x%x - arg data\n", arg_data_base); 312 DPRINTF(X86, "0x%x - auxv array\n", auxv_array_base); 313 DPRINTF(X86, "0x%x - envp array\n", envp_array_base); 314 DPRINTF(X86, "0x%x - argv array\n", argv_array_base); 315 DPRINTF(X86, "0x%x - argc \n", argc_base); 316 DPRINTF(X86, "0x%x - stack min\n", stack_min); 317 318 // write contents to stack 319 320 // figure out argc 321 uint64_t argc = argv.size(); 322 uint64_t guestArgc = TheISA::htog(argc); 323 324 //Write out the mysterious 0 325 uint64_t mysterious_zero = 0; 326 initVirtMem->writeBlob(mysterious_base, 327 (uint8_t*)&mysterious_zero, mysterious_size); 328 329 //Write the file name 330 initVirtMem->writeString(file_name_base, filename.c_str()); 331 332 //Copy the aux stuff 333 for(int x = 0; x < auxv.size(); x++) 334 { 335 initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize, 336 (uint8_t*)&(auxv[x].a_type), intSize); 337 initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize, 338 (uint8_t*)&(auxv[x].a_val), intSize); 339 } 340 //Write out the terminating zeroed auxilliary vector 341 const uint64_t zero = 0; 342 initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(), 343 (uint8_t*)&zero, 2 * intSize); 344 345 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem); 346 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem); 347 348 initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize); 349 350 //Set up the thread context to start running the process 351 threadContexts[0]->setIntReg(StackPointerReg, stack_min); 352 353 Addr prog_entry = objFile->entryPoint(); 354 threadContexts[0]->setPC(prog_entry); 355 threadContexts[0]->setNextPC(prog_entry + sizeof(MachInst)); 356 357 //Align the "stack_min" to a page boundary. 358 stack_min = roundDown(stack_min, pageSize); 359 360// num_processes++; 361} 362