process.cc revision 11793
16691Stjones1@inf.ed.ac.uk/* 26691Stjones1@inf.ed.ac.uk * Copyright (c) 2007-2008 The Florida State University 36691Stjones1@inf.ed.ac.uk * Copyright (c) 2009 The University of Edinburgh 46691Stjones1@inf.ed.ac.uk * All rights reserved. 56691Stjones1@inf.ed.ac.uk * 66691Stjones1@inf.ed.ac.uk * Redistribution and use in source and binary forms, with or without 76691Stjones1@inf.ed.ac.uk * modification, are permitted provided that the following conditions are 86691Stjones1@inf.ed.ac.uk * met: redistributions of source code must retain the above copyright 96691Stjones1@inf.ed.ac.uk * notice, this list of conditions and the following disclaimer; 106691Stjones1@inf.ed.ac.uk * redistributions in binary form must reproduce the above copyright 116691Stjones1@inf.ed.ac.uk * notice, this list of conditions and the following disclaimer in the 126691Stjones1@inf.ed.ac.uk * documentation and/or other materials provided with the distribution; 136691Stjones1@inf.ed.ac.uk * neither the name of the copyright holders nor the names of its 146691Stjones1@inf.ed.ac.uk * contributors may be used to endorse or promote products derived from 156691Stjones1@inf.ed.ac.uk * this software without specific prior written permission. 166691Stjones1@inf.ed.ac.uk * 176691Stjones1@inf.ed.ac.uk * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 186691Stjones1@inf.ed.ac.uk * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 196691Stjones1@inf.ed.ac.uk * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 206691Stjones1@inf.ed.ac.uk * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 216691Stjones1@inf.ed.ac.uk * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 226691Stjones1@inf.ed.ac.uk * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 236691Stjones1@inf.ed.ac.uk * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 246691Stjones1@inf.ed.ac.uk * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 256691Stjones1@inf.ed.ac.uk * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 266691Stjones1@inf.ed.ac.uk * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 276691Stjones1@inf.ed.ac.uk * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 286691Stjones1@inf.ed.ac.uk * 296691Stjones1@inf.ed.ac.uk * Authors: Stephen Hines 306691Stjones1@inf.ed.ac.uk * Timothy M. Jones 316691Stjones1@inf.ed.ac.uk */ 326691Stjones1@inf.ed.ac.uk 336691Stjones1@inf.ed.ac.uk#include "arch/power/process.hh" 346691Stjones1@inf.ed.ac.uk 356691Stjones1@inf.ed.ac.uk#include "arch/power/isa_traits.hh" 366691Stjones1@inf.ed.ac.uk#include "arch/power/types.hh" 376691Stjones1@inf.ed.ac.uk#include "base/loader/elf_object.hh" 386691Stjones1@inf.ed.ac.uk#include "base/loader/object_file.hh" 396691Stjones1@inf.ed.ac.uk#include "base/misc.hh" 406691Stjones1@inf.ed.ac.uk#include "cpu/thread_context.hh" 416691Stjones1@inf.ed.ac.uk#include "debug/Stack.hh" 4210687SAndreas.Sandberg@ARM.com#include "mem/page_table.hh" 436691Stjones1@inf.ed.ac.uk#include "sim/process_impl.hh" 448229Snate@binkert.org#include "sim/system.hh" 456691Stjones1@inf.ed.ac.uk 466691Stjones1@inf.ed.ac.ukusing namespace std; 476691Stjones1@inf.ed.ac.ukusing namespace PowerISA; 486691Stjones1@inf.ed.ac.uk 496691Stjones1@inf.ed.ac.ukPowerLiveProcess::PowerLiveProcess(LiveProcessParams *params, 506691Stjones1@inf.ed.ac.uk ObjectFile *objFile) 516691Stjones1@inf.ed.ac.uk : LiveProcess(params, objFile) 526691Stjones1@inf.ed.ac.uk{ 536691Stjones1@inf.ed.ac.uk stack_base = 0xbf000000L; 546691Stjones1@inf.ed.ac.uk 556691Stjones1@inf.ed.ac.uk // Set pointer for next thread stack. Reserve 8M for main stack. 566691Stjones1@inf.ed.ac.uk next_thread_stack_base = stack_base - (8 * 1024 * 1024); 576691Stjones1@inf.ed.ac.uk 586691Stjones1@inf.ed.ac.uk // Set up break point (Top of Heap) 596691Stjones1@inf.ed.ac.uk brk_point = objFile->dataBase() + objFile->dataSize() + objFile->bssSize(); 606691Stjones1@inf.ed.ac.uk brk_point = roundUp(brk_point, PageBytes); 616691Stjones1@inf.ed.ac.uk 626691Stjones1@inf.ed.ac.uk // Set up region for mmaps. For now, start at bottom of kuseg space. 636691Stjones1@inf.ed.ac.uk mmap_end = 0x70000000L; 646691Stjones1@inf.ed.ac.uk} 6510558Salexandru.dutu@amd.com 6610558Salexandru.dutu@amd.comvoid 676691Stjones1@inf.ed.ac.ukPowerLiveProcess::initState() 686691Stjones1@inf.ed.ac.uk{ 6910558Salexandru.dutu@amd.com Process::initState(); 7010558Salexandru.dutu@amd.com 7110558Salexandru.dutu@amd.com argsInit(MachineBytes, PageBytes); 726691Stjones1@inf.ed.ac.uk} 736691Stjones1@inf.ed.ac.uk 746691Stjones1@inf.ed.ac.ukvoid 756691Stjones1@inf.ed.ac.ukPowerLiveProcess::argsInit(int intSize, int pageSize) 766691Stjones1@inf.ed.ac.uk{ 776691Stjones1@inf.ed.ac.uk typedef AuxVector<uint32_t> auxv_t; 786691Stjones1@inf.ed.ac.uk std::vector<auxv_t> auxv; 796691Stjones1@inf.ed.ac.uk 806691Stjones1@inf.ed.ac.uk string filename; 816691Stjones1@inf.ed.ac.uk if (argv.size() < 1) 826691Stjones1@inf.ed.ac.uk filename = ""; 836691Stjones1@inf.ed.ac.uk else 846691Stjones1@inf.ed.ac.uk filename = argv[0]; 856691Stjones1@inf.ed.ac.uk 866691Stjones1@inf.ed.ac.uk //We want 16 byte alignment 8710905Sandreas.sandberg@arm.com uint64_t align = 16; 886691Stjones1@inf.ed.ac.uk 896691Stjones1@inf.ed.ac.uk // Patch the ld_bias for dynamic executables. 906691Stjones1@inf.ed.ac.uk updateBias(); 916691Stjones1@inf.ed.ac.uk 926691Stjones1@inf.ed.ac.uk // load object file into target memory 9310905Sandreas.sandberg@arm.com objFile->loadSections(initVirtMem); 946691Stjones1@inf.ed.ac.uk 956691Stjones1@inf.ed.ac.uk //Setup the auxilliary vectors. These will already have endian conversion. 966691Stjones1@inf.ed.ac.uk //Auxilliary vectors are loaded only for elf formatted executables. 976691Stjones1@inf.ed.ac.uk ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile); 986691Stjones1@inf.ed.ac.uk if (elfObject) { 996691Stjones1@inf.ed.ac.uk uint32_t features = 0; 1006691Stjones1@inf.ed.ac.uk 1016691Stjones1@inf.ed.ac.uk //Bits which describe the system hardware capabilities 1026691Stjones1@inf.ed.ac.uk //XXX Figure out what these should be 1036691Stjones1@inf.ed.ac.uk auxv.push_back(auxv_t(M5_AT_HWCAP, features)); 1046691Stjones1@inf.ed.ac.uk //The system page size 1056691Stjones1@inf.ed.ac.uk auxv.push_back(auxv_t(M5_AT_PAGESZ, PowerISA::PageBytes)); 1066691Stjones1@inf.ed.ac.uk //Frequency at which times() increments 1076691Stjones1@inf.ed.ac.uk auxv.push_back(auxv_t(M5_AT_CLKTCK, 0x64)); 1086691Stjones1@inf.ed.ac.uk // For statically linked executables, this is the virtual address of the 1096691Stjones1@inf.ed.ac.uk // program header tables if they appear in the executable image 1106691Stjones1@inf.ed.ac.uk auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable())); 1116691Stjones1@inf.ed.ac.uk // This is the size of a program header entry from the elf file. 1126691Stjones1@inf.ed.ac.uk auxv.push_back(auxv_t(M5_AT_PHENT, elfObject->programHeaderSize())); 1136691Stjones1@inf.ed.ac.uk // This is the number of program headers from the original elf file. 1146691Stjones1@inf.ed.ac.uk auxv.push_back(auxv_t(M5_AT_PHNUM, elfObject->programHeaderCount())); 1156691Stjones1@inf.ed.ac.uk // This is the base address of the ELF interpreter; it should be 1166691Stjones1@inf.ed.ac.uk // zero for static executables or contain the base address for 1176691Stjones1@inf.ed.ac.uk // dynamic executables. 1186691Stjones1@inf.ed.ac.uk auxv.push_back(auxv_t(M5_AT_BASE, getBias())); 1196691Stjones1@inf.ed.ac.uk //XXX Figure out what this should be. 1206691Stjones1@inf.ed.ac.uk auxv.push_back(auxv_t(M5_AT_FLAGS, 0)); 1216691Stjones1@inf.ed.ac.uk //The entry point to the program 1226691Stjones1@inf.ed.ac.uk auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint())); 1236691Stjones1@inf.ed.ac.uk //Different user and group IDs 1246691Stjones1@inf.ed.ac.uk auxv.push_back(auxv_t(M5_AT_UID, uid())); 1256691Stjones1@inf.ed.ac.uk auxv.push_back(auxv_t(M5_AT_EUID, euid())); 1266691Stjones1@inf.ed.ac.uk auxv.push_back(auxv_t(M5_AT_GID, gid())); 1276691Stjones1@inf.ed.ac.uk auxv.push_back(auxv_t(M5_AT_EGID, egid())); 1286691Stjones1@inf.ed.ac.uk //Whether to enable "secure mode" in the executable 1296691Stjones1@inf.ed.ac.uk auxv.push_back(auxv_t(M5_AT_SECURE, 0)); 1306691Stjones1@inf.ed.ac.uk //The filename of the program 1316691Stjones1@inf.ed.ac.uk auxv.push_back(auxv_t(M5_AT_EXECFN, 0)); 1326691Stjones1@inf.ed.ac.uk //The string "v51" with unknown meaning 1336691Stjones1@inf.ed.ac.uk auxv.push_back(auxv_t(M5_AT_PLATFORM, 0)); 1346691Stjones1@inf.ed.ac.uk } 1356691Stjones1@inf.ed.ac.uk 13611347Sandreas.hansson@arm.com //Figure out how big the initial stack nedes to be 13710194SGeoffrey.Blake@arm.com 1386691Stjones1@inf.ed.ac.uk // A sentry NULL void pointer at the top of the stack. 1396691Stjones1@inf.ed.ac.uk int sentry_size = intSize; 1406691Stjones1@inf.ed.ac.uk 1416691Stjones1@inf.ed.ac.uk string platform = "v51"; 1426691Stjones1@inf.ed.ac.uk int platform_size = platform.size() + 1; 1436691Stjones1@inf.ed.ac.uk 1446691Stjones1@inf.ed.ac.uk // The aux vectors are put on the stack in two groups. The first group are 1456691Stjones1@inf.ed.ac.uk // the vectors that are generated as the elf is loaded. The second group 1466691Stjones1@inf.ed.ac.uk // are the ones that were computed ahead of time and include the platform 1476691Stjones1@inf.ed.ac.uk // string. 1486691Stjones1@inf.ed.ac.uk int aux_data_size = filename.size() + 1; 1496691Stjones1@inf.ed.ac.uk 1506691Stjones1@inf.ed.ac.uk int env_data_size = 0; 1516691Stjones1@inf.ed.ac.uk for (int i = 0; i < envp.size(); ++i) { 15211347Sandreas.hansson@arm.com env_data_size += envp[i].size() + 1; 1536691Stjones1@inf.ed.ac.uk } 1546691Stjones1@inf.ed.ac.uk int arg_data_size = 0; 15511347Sandreas.hansson@arm.com for (int i = 0; i < argv.size(); ++i) { 1566691Stjones1@inf.ed.ac.uk arg_data_size += argv[i].size() + 1; 1576691Stjones1@inf.ed.ac.uk } 1586691Stjones1@inf.ed.ac.uk 1596691Stjones1@inf.ed.ac.uk int info_block_size = 1606691Stjones1@inf.ed.ac.uk sentry_size + env_data_size + arg_data_size + 1616691Stjones1@inf.ed.ac.uk aux_data_size + platform_size; 1626691Stjones1@inf.ed.ac.uk 1636972Stjones1@inf.ed.ac.uk //Each auxilliary vector is two 4 byte words 1646972Stjones1@inf.ed.ac.uk int aux_array_size = intSize * 2 * (auxv.size() + 1); 16512406Sgabeblack@google.com 16612406Sgabeblack@google.com int envp_array_size = intSize * (envp.size() + 1); 16712406Sgabeblack@google.com int argv_array_size = intSize * (argv.size() + 1); 16812406Sgabeblack@google.com 16912406Sgabeblack@google.com int argc_size = intSize; 17012406Sgabeblack@google.com 17112406Sgabeblack@google.com //Figure out the size of the contents of the actual initial frame 1726691Stjones1@inf.ed.ac.uk int frame_size = 1736691Stjones1@inf.ed.ac.uk info_block_size + 17411168Sandreas.hansson@arm.com aux_array_size + 17511168Sandreas.hansson@arm.com envp_array_size + 17610905Sandreas.sandberg@arm.com argv_array_size + 17711347Sandreas.hansson@arm.com argc_size; 1786691Stjones1@inf.ed.ac.uk 1796691Stjones1@inf.ed.ac.uk //There needs to be padding after the auxiliary vector data so that the 1807811Ssteve.reinhardt@amd.com //very bottom of the stack is aligned properly. 1816691Stjones1@inf.ed.ac.uk int partial_size = frame_size; 1826691Stjones1@inf.ed.ac.uk int aligned_partial_size = roundUp(partial_size, align); 183 int aux_padding = aligned_partial_size - partial_size; 184 185 int space_needed = frame_size + aux_padding; 186 187 stack_min = stack_base - space_needed; 188 stack_min = roundDown(stack_min, align); 189 stack_size = stack_base - stack_min; 190 191 // map memory 192 allocateMem(roundDown(stack_min, pageSize), roundUp(stack_size, pageSize)); 193 194 // map out initial stack contents 195 uint32_t sentry_base = stack_base - sentry_size; 196 uint32_t aux_data_base = sentry_base - aux_data_size; 197 uint32_t env_data_base = aux_data_base - env_data_size; 198 uint32_t arg_data_base = env_data_base - arg_data_size; 199 uint32_t platform_base = arg_data_base - platform_size; 200 uint32_t auxv_array_base = platform_base - aux_array_size - aux_padding; 201 uint32_t envp_array_base = auxv_array_base - envp_array_size; 202 uint32_t argv_array_base = envp_array_base - argv_array_size; 203 uint32_t argc_base = argv_array_base - argc_size; 204 205 DPRINTF(Stack, "The addresses of items on the initial stack:\n"); 206 DPRINTF(Stack, "0x%x - aux data\n", aux_data_base); 207 DPRINTF(Stack, "0x%x - env data\n", env_data_base); 208 DPRINTF(Stack, "0x%x - arg data\n", arg_data_base); 209 DPRINTF(Stack, "0x%x - platform base\n", platform_base); 210 DPRINTF(Stack, "0x%x - auxv array\n", auxv_array_base); 211 DPRINTF(Stack, "0x%x - envp array\n", envp_array_base); 212 DPRINTF(Stack, "0x%x - argv array\n", argv_array_base); 213 DPRINTF(Stack, "0x%x - argc \n", argc_base); 214 DPRINTF(Stack, "0x%x - stack min\n", stack_min); 215 216 // write contents to stack 217 218 // figure out argc 219 uint32_t argc = argv.size(); 220 uint32_t guestArgc = PowerISA::htog(argc); 221 222 //Write out the sentry void * 223 uint32_t sentry_NULL = 0; 224 initVirtMem.writeBlob(sentry_base, 225 (uint8_t*)&sentry_NULL, sentry_size); 226 227 //Fix up the aux vectors which point to other data 228 for (int i = auxv.size() - 1; i >= 0; i--) { 229 if (auxv[i].a_type == M5_AT_PLATFORM) { 230 auxv[i].a_val = platform_base; 231 initVirtMem.writeString(platform_base, platform.c_str()); 232 } else if (auxv[i].a_type == M5_AT_EXECFN) { 233 auxv[i].a_val = aux_data_base; 234 initVirtMem.writeString(aux_data_base, filename.c_str()); 235 } 236 } 237 238 //Copy the aux stuff 239 for (int x = 0; x < auxv.size(); x++) 240 { 241 initVirtMem.writeBlob(auxv_array_base + x * 2 * intSize, 242 (uint8_t*)&(auxv[x].a_type), intSize); 243 initVirtMem.writeBlob(auxv_array_base + (x * 2 + 1) * intSize, 244 (uint8_t*)&(auxv[x].a_val), intSize); 245 } 246 //Write out the terminating zeroed auxilliary vector 247 const uint64_t zero = 0; 248 initVirtMem.writeBlob(auxv_array_base + 2 * intSize * auxv.size(), 249 (uint8_t*)&zero, 2 * intSize); 250 251 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem); 252 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem); 253 254 initVirtMem.writeBlob(argc_base, (uint8_t*)&guestArgc, intSize); 255 256 ThreadContext *tc = system->getThreadContext(contextIds[0]); 257 258 //Set the stack pointer register 259 tc->setIntReg(StackPointerReg, stack_min); 260 261 tc->pcState(getStartPC()); 262 263 //Align the "stack_min" to a page boundary. 264 stack_min = roundDown(stack_min, pageSize); 265} 266 267PowerISA::IntReg 268PowerLiveProcess::getSyscallArg(ThreadContext *tc, int &i) 269{ 270 assert(i < 5); 271 return tc->readIntReg(ArgumentReg0 + i++); 272} 273 274void 275PowerLiveProcess::setSyscallArg(ThreadContext *tc, 276 int i, PowerISA::IntReg val) 277{ 278 assert(i < 5); 279 tc->setIntReg(ArgumentReg0 + i, val); 280} 281 282void 283PowerLiveProcess::setSyscallReturn(ThreadContext *tc, SyscallReturn sysret) 284{ 285 Cr cr = tc->readIntReg(INTREG_CR); 286 if (sysret.successful()) { 287 cr.cr0.so = 0; 288 } else { 289 cr.cr0.so = 1; 290 } 291 tc->setIntReg(INTREG_CR, cr); 292 tc->setIntReg(ReturnValueReg, sysret.encodedValue()); 293} 294