process.cc revision 8601
19616Sandreas.hansson@arm.com/* 29616Sandreas.hansson@arm.com * Copyright (c) 2007-2008 The Florida State University 39616Sandreas.hansson@arm.com * Copyright (c) 2009 The University of Edinburgh 49616Sandreas.hansson@arm.com * All rights reserved. 59616Sandreas.hansson@arm.com * 69616Sandreas.hansson@arm.com * Redistribution and use in source and binary forms, with or without 79616Sandreas.hansson@arm.com * modification, are permitted provided that the following conditions are 89616Sandreas.hansson@arm.com * met: redistributions of source code must retain the above copyright 99616Sandreas.hansson@arm.com * notice, this list of conditions and the following disclaimer; 109616Sandreas.hansson@arm.com * redistributions in binary form must reproduce the above copyright 119616Sandreas.hansson@arm.com * notice, this list of conditions and the following disclaimer in the 129616Sandreas.hansson@arm.com * documentation and/or other materials provided with the distribution; 139616Sandreas.hansson@arm.com * neither the name of the copyright holders nor the names of its 149616Sandreas.hansson@arm.com * contributors may be used to endorse or promote products derived from 159616Sandreas.hansson@arm.com * this software without specific prior written permission. 169616Sandreas.hansson@arm.com * 179616Sandreas.hansson@arm.com * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 189616Sandreas.hansson@arm.com * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 199616Sandreas.hansson@arm.com * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 209616Sandreas.hansson@arm.com * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 219616Sandreas.hansson@arm.com * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 229616Sandreas.hansson@arm.com * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 239616Sandreas.hansson@arm.com * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 249616Sandreas.hansson@arm.com * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 259616Sandreas.hansson@arm.com * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 269616Sandreas.hansson@arm.com * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 279616Sandreas.hansson@arm.com * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 289616Sandreas.hansson@arm.com * 299616Sandreas.hansson@arm.com * Authors: Stephen Hines 309616Sandreas.hansson@arm.com * Timothy M. Jones 319616Sandreas.hansson@arm.com */ 329616Sandreas.hansson@arm.com 339616Sandreas.hansson@arm.com#include "arch/power/isa_traits.hh" 349616Sandreas.hansson@arm.com#include "arch/power/process.hh" 359616Sandreas.hansson@arm.com#include "arch/power/types.hh" 369616Sandreas.hansson@arm.com#include "base/loader/elf_object.hh" 379616Sandreas.hansson@arm.com#include "base/loader/object_file.hh" 389616Sandreas.hansson@arm.com#include "base/misc.hh" 399616Sandreas.hansson@arm.com#include "cpu/thread_context.hh" 409616Sandreas.hansson@arm.com#include "debug/Stack.hh" 419616Sandreas.hansson@arm.com#include "mem/page_table.hh" 429616Sandreas.hansson@arm.com#include "mem/translating_port.hh" 439616Sandreas.hansson@arm.com#include "sim/process_impl.hh" 449616Sandreas.hansson@arm.com#include "sim/system.hh" 459616Sandreas.hansson@arm.com 469616Sandreas.hansson@arm.comusing namespace std; 479616Sandreas.hansson@arm.comusing namespace PowerISA; 489616Sandreas.hansson@arm.com 499616Sandreas.hansson@arm.comPowerLiveProcess::PowerLiveProcess(LiveProcessParams *params, 509616Sandreas.hansson@arm.com ObjectFile *objFile) 519616Sandreas.hansson@arm.com : LiveProcess(params, objFile) 529616Sandreas.hansson@arm.com{ 539616Sandreas.hansson@arm.com stack_base = 0xbf000000L; 549616Sandreas.hansson@arm.com 559616Sandreas.hansson@arm.com // Set pointer for next thread stack. Reserve 8M for main stack. 569616Sandreas.hansson@arm.com next_thread_stack_base = stack_base - (8 * 1024 * 1024); 579616Sandreas.hansson@arm.com 589616Sandreas.hansson@arm.com // Set up break point (Top of Heap) 599616Sandreas.hansson@arm.com brk_point = objFile->dataBase() + objFile->dataSize() + objFile->bssSize(); 609616Sandreas.hansson@arm.com brk_point = roundUp(brk_point, VMPageSize); 619616Sandreas.hansson@arm.com 629616Sandreas.hansson@arm.com // Set up region for mmaps. For now, start at bottom of kuseg space. 639616Sandreas.hansson@arm.com mmap_start = mmap_end = 0x70000000L; 649616Sandreas.hansson@arm.com} 659616Sandreas.hansson@arm.com 669616Sandreas.hansson@arm.comvoid 679616Sandreas.hansson@arm.comPowerLiveProcess::initState() 689616Sandreas.hansson@arm.com{ 699616Sandreas.hansson@arm.com Process::initState(); 709616Sandreas.hansson@arm.com 719616Sandreas.hansson@arm.com argsInit(MachineBytes, VMPageSize); 729616Sandreas.hansson@arm.com} 739616Sandreas.hansson@arm.com 749616Sandreas.hansson@arm.comvoid 759616Sandreas.hansson@arm.comPowerLiveProcess::argsInit(int intSize, int pageSize) 769616Sandreas.hansson@arm.com{ 779616Sandreas.hansson@arm.com typedef AuxVector<uint32_t> auxv_t; 789616Sandreas.hansson@arm.com std::vector<auxv_t> auxv; 799616Sandreas.hansson@arm.com 809616Sandreas.hansson@arm.com string filename; 819616Sandreas.hansson@arm.com if (argv.size() < 1) 829616Sandreas.hansson@arm.com filename = ""; 839616Sandreas.hansson@arm.com else 849616Sandreas.hansson@arm.com filename = argv[0]; 859616Sandreas.hansson@arm.com 869616Sandreas.hansson@arm.com //We want 16 byte alignment 879616Sandreas.hansson@arm.com uint64_t align = 16; 889706Sandreas.hansson@arm.com 899706Sandreas.hansson@arm.com // load object file into target memory 909706Sandreas.hansson@arm.com objFile->loadSections(initVirtMem); 919706Sandreas.hansson@arm.com 929706Sandreas.hansson@arm.com //Setup the auxilliary vectors. These will already have endian conversion. 939706Sandreas.hansson@arm.com //Auxilliary vectors are loaded only for elf formatted executables. 949706Sandreas.hansson@arm.com ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile); 959706Sandreas.hansson@arm.com if (elfObject) { 969706Sandreas.hansson@arm.com uint32_t features = 0; 979706Sandreas.hansson@arm.com 989706Sandreas.hansson@arm.com //Bits which describe the system hardware capabilities 999706Sandreas.hansson@arm.com //XXX Figure out what these should be 1009706Sandreas.hansson@arm.com auxv.push_back(auxv_t(M5_AT_HWCAP, features)); 1019706Sandreas.hansson@arm.com //The system page size 1029706Sandreas.hansson@arm.com auxv.push_back(auxv_t(M5_AT_PAGESZ, PowerISA::VMPageSize)); 1039706Sandreas.hansson@arm.com //Frequency at which times() increments 1049706Sandreas.hansson@arm.com auxv.push_back(auxv_t(M5_AT_CLKTCK, 0x64)); 1059616Sandreas.hansson@arm.com // For statically linked executables, this is the virtual address of the 1069616Sandreas.hansson@arm.com // program header tables if they appear in the executable image 1079616Sandreas.hansson@arm.com auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable())); 1089616Sandreas.hansson@arm.com // This is the size of a program header entry from the elf file. 1099616Sandreas.hansson@arm.com auxv.push_back(auxv_t(M5_AT_PHENT, elfObject->programHeaderSize())); 1109616Sandreas.hansson@arm.com // This is the number of program headers from the original elf file. 1119616Sandreas.hansson@arm.com auxv.push_back(auxv_t(M5_AT_PHNUM, elfObject->programHeaderCount())); 1129616Sandreas.hansson@arm.com //This is the address of the elf "interpreter", It should be set 1139616Sandreas.hansson@arm.com //to 0 for regular executables. It should be something else 1149616Sandreas.hansson@arm.com //(not sure what) for dynamic libraries. 1159616Sandreas.hansson@arm.com auxv.push_back(auxv_t(M5_AT_BASE, 0)); 1169616Sandreas.hansson@arm.com 1179616Sandreas.hansson@arm.com //XXX Figure out what this should be. 1189616Sandreas.hansson@arm.com auxv.push_back(auxv_t(M5_AT_FLAGS, 0)); 1199616Sandreas.hansson@arm.com //The entry point to the program 1209616Sandreas.hansson@arm.com auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint())); 1219616Sandreas.hansson@arm.com //Different user and group IDs 1229616Sandreas.hansson@arm.com auxv.push_back(auxv_t(M5_AT_UID, uid())); 1239616Sandreas.hansson@arm.com auxv.push_back(auxv_t(M5_AT_EUID, euid())); 1249616Sandreas.hansson@arm.com auxv.push_back(auxv_t(M5_AT_GID, gid())); 1259616Sandreas.hansson@arm.com auxv.push_back(auxv_t(M5_AT_EGID, egid())); 1269616Sandreas.hansson@arm.com //Whether to enable "secure mode" in the executable 1279616Sandreas.hansson@arm.com auxv.push_back(auxv_t(M5_AT_SECURE, 0)); 1289616Sandreas.hansson@arm.com //The filename of the program 1299616Sandreas.hansson@arm.com auxv.push_back(auxv_t(M5_AT_EXECFN, 0)); 1309616Sandreas.hansson@arm.com //The string "v51" with unknown meaning 1319616Sandreas.hansson@arm.com auxv.push_back(auxv_t(M5_AT_PLATFORM, 0)); 1329616Sandreas.hansson@arm.com } 1339616Sandreas.hansson@arm.com 1349616Sandreas.hansson@arm.com //Figure out how big the initial stack nedes to be 1359616Sandreas.hansson@arm.com 1369616Sandreas.hansson@arm.com // A sentry NULL void pointer at the top of the stack. 1379616Sandreas.hansson@arm.com int sentry_size = intSize; 1389616Sandreas.hansson@arm.com 1399616Sandreas.hansson@arm.com string platform = "v51"; 1409616Sandreas.hansson@arm.com int platform_size = platform.size() + 1; 1419616Sandreas.hansson@arm.com 1429616Sandreas.hansson@arm.com // The aux vectors are put on the stack in two groups. The first group are 1439616Sandreas.hansson@arm.com // the vectors that are generated as the elf is loaded. The second group 1449616Sandreas.hansson@arm.com // are the ones that were computed ahead of time and include the platform 1459616Sandreas.hansson@arm.com // string. 1469616Sandreas.hansson@arm.com int aux_data_size = filename.size() + 1; 1479616Sandreas.hansson@arm.com 1489616Sandreas.hansson@arm.com int env_data_size = 0; 1499616Sandreas.hansson@arm.com for (int i = 0; i < envp.size(); ++i) { 1509616Sandreas.hansson@arm.com env_data_size += envp[i].size() + 1; 1519616Sandreas.hansson@arm.com } 1529616Sandreas.hansson@arm.com int arg_data_size = 0; 1539616Sandreas.hansson@arm.com for (int i = 0; i < argv.size(); ++i) { 1549616Sandreas.hansson@arm.com arg_data_size += argv[i].size() + 1; 1559616Sandreas.hansson@arm.com } 1569616Sandreas.hansson@arm.com 1579616Sandreas.hansson@arm.com int info_block_size = 1589616Sandreas.hansson@arm.com sentry_size + env_data_size + arg_data_size + 1599616Sandreas.hansson@arm.com aux_data_size + platform_size; 1609616Sandreas.hansson@arm.com 1619616Sandreas.hansson@arm.com //Each auxilliary vector is two 4 byte words 1629616Sandreas.hansson@arm.com int aux_array_size = intSize * 2 * (auxv.size() + 1); 1639616Sandreas.hansson@arm.com 1649616Sandreas.hansson@arm.com int envp_array_size = intSize * (envp.size() + 1); 1659616Sandreas.hansson@arm.com int argv_array_size = intSize * (argv.size() + 1); 1669616Sandreas.hansson@arm.com 1679616Sandreas.hansson@arm.com int argc_size = intSize; 1689616Sandreas.hansson@arm.com 1699616Sandreas.hansson@arm.com //Figure out the size of the contents of the actual initial frame 1709616Sandreas.hansson@arm.com int frame_size = 1719616Sandreas.hansson@arm.com info_block_size + 1729616Sandreas.hansson@arm.com aux_array_size + 1739616Sandreas.hansson@arm.com envp_array_size + 174 argv_array_size + 175 argc_size; 176 177 //There needs to be padding after the auxiliary vector data so that the 178 //very bottom of the stack is aligned properly. 179 int partial_size = frame_size; 180 int aligned_partial_size = roundUp(partial_size, align); 181 int aux_padding = aligned_partial_size - partial_size; 182 183 int space_needed = frame_size + aux_padding; 184 185 stack_min = stack_base - space_needed; 186 stack_min = roundDown(stack_min, align); 187 stack_size = stack_base - stack_min; 188 189 // map memory 190 allocateMem(roundDown(stack_min, pageSize), roundUp(stack_size, pageSize)); 191 192 // map out initial stack contents 193 uint32_t sentry_base = stack_base - sentry_size; 194 uint32_t aux_data_base = sentry_base - aux_data_size; 195 uint32_t env_data_base = aux_data_base - env_data_size; 196 uint32_t arg_data_base = env_data_base - arg_data_size; 197 uint32_t platform_base = arg_data_base - platform_size; 198 uint32_t auxv_array_base = platform_base - aux_array_size - aux_padding; 199 uint32_t envp_array_base = auxv_array_base - envp_array_size; 200 uint32_t argv_array_base = envp_array_base - argv_array_size; 201 uint32_t argc_base = argv_array_base - argc_size; 202 203 DPRINTF(Stack, "The addresses of items on the initial stack:\n"); 204 DPRINTF(Stack, "0x%x - aux data\n", aux_data_base); 205 DPRINTF(Stack, "0x%x - env data\n", env_data_base); 206 DPRINTF(Stack, "0x%x - arg data\n", arg_data_base); 207 DPRINTF(Stack, "0x%x - platform base\n", platform_base); 208 DPRINTF(Stack, "0x%x - auxv array\n", auxv_array_base); 209 DPRINTF(Stack, "0x%x - envp array\n", envp_array_base); 210 DPRINTF(Stack, "0x%x - argv array\n", argv_array_base); 211 DPRINTF(Stack, "0x%x - argc \n", argc_base); 212 DPRINTF(Stack, "0x%x - stack min\n", stack_min); 213 214 // write contents to stack 215 216 // figure out argc 217 uint32_t argc = argv.size(); 218 uint32_t guestArgc = PowerISA::htog(argc); 219 220 //Write out the sentry void * 221 uint32_t sentry_NULL = 0; 222 initVirtMem->writeBlob(sentry_base, 223 (uint8_t*)&sentry_NULL, sentry_size); 224 225 //Fix up the aux vectors which point to other data 226 for (int i = auxv.size() - 1; i >= 0; i--) { 227 if (auxv[i].a_type == M5_AT_PLATFORM) { 228 auxv[i].a_val = platform_base; 229 initVirtMem->writeString(platform_base, platform.c_str()); 230 } else if (auxv[i].a_type == M5_AT_EXECFN) { 231 auxv[i].a_val = aux_data_base; 232 initVirtMem->writeString(aux_data_base, filename.c_str()); 233 } 234 } 235 236 //Copy the aux stuff 237 for (int x = 0; x < auxv.size(); x++) 238 { 239 initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize, 240 (uint8_t*)&(auxv[x].a_type), intSize); 241 initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize, 242 (uint8_t*)&(auxv[x].a_val), intSize); 243 } 244 //Write out the terminating zeroed auxilliary vector 245 const uint64_t zero = 0; 246 initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(), 247 (uint8_t*)&zero, 2 * intSize); 248 249 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem); 250 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem); 251 252 initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize); 253 254 ThreadContext *tc = system->getThreadContext(contextIds[0]); 255 256 //Set the stack pointer register 257 tc->setIntReg(StackPointerReg, stack_min); 258 259 tc->pcState(objFile->entryPoint()); 260 261 //Align the "stack_min" to a page boundary. 262 stack_min = roundDown(stack_min, pageSize); 263} 264 265PowerISA::IntReg 266PowerLiveProcess::getSyscallArg(ThreadContext *tc, int &i) 267{ 268 assert(i < 5); 269 return tc->readIntReg(ArgumentReg0 + i++); 270} 271 272void 273PowerLiveProcess::setSyscallArg(ThreadContext *tc, 274 int i, PowerISA::IntReg val) 275{ 276 assert(i < 5); 277 tc->setIntReg(ArgumentReg0 + i, val); 278} 279 280void 281PowerLiveProcess::setSyscallReturn(ThreadContext *tc, 282 SyscallReturn return_value) 283{ 284 Cr cr = tc->readIntReg(INTREG_CR); 285 if (return_value.successful()) { 286 cr.cr0.so = 0; 287 } else { 288 cr.cr0.so = 1; 289 } 290 tc->setIntReg(INTREG_CR, cr); 291 tc->setIntReg(ReturnValueReg, return_value.value()); 292} 293