process.cc revision 12448:b299e560f1d8
15081Sgblack@eecs.umich.edu/* 25081Sgblack@eecs.umich.edu * Copyright (c) 2004-2005 The Regents of The University of Michigan 35081Sgblack@eecs.umich.edu * All rights reserved. 45081Sgblack@eecs.umich.edu * 55081Sgblack@eecs.umich.edu * Redistribution and use in source and binary forms, with or without 65081Sgblack@eecs.umich.edu * modification, are permitted provided that the following conditions are 75081Sgblack@eecs.umich.edu * met: redistributions of source code must retain the above copyright 85081Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer; 95081Sgblack@eecs.umich.edu * redistributions in binary form must reproduce the above copyright 105081Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer in the 115081Sgblack@eecs.umich.edu * documentation and/or other materials provided with the distribution; 125081Sgblack@eecs.umich.edu * neither the name of the copyright holders nor the names of its 135081Sgblack@eecs.umich.edu * contributors may be used to endorse or promote products derived from 145081Sgblack@eecs.umich.edu * this software without specific prior written permission. 155081Sgblack@eecs.umich.edu * 165081Sgblack@eecs.umich.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 175081Sgblack@eecs.umich.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 185081Sgblack@eecs.umich.edu * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 195081Sgblack@eecs.umich.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 205081Sgblack@eecs.umich.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 215081Sgblack@eecs.umich.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 225081Sgblack@eecs.umich.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 235081Sgblack@eecs.umich.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 245081Sgblack@eecs.umich.edu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 255081Sgblack@eecs.umich.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 265081Sgblack@eecs.umich.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 275081Sgblack@eecs.umich.edu * 285081Sgblack@eecs.umich.edu * Authors: Gabe Black 295081Sgblack@eecs.umich.edu * Ali Saidi 305081Sgblack@eecs.umich.edu * Korey Sewell 315081Sgblack@eecs.umich.edu */ 325081Sgblack@eecs.umich.edu 335081Sgblack@eecs.umich.edu#include "arch/mips/process.hh" 345081Sgblack@eecs.umich.edu 355081Sgblack@eecs.umich.edu#include "arch/mips/isa_traits.hh" 365081Sgblack@eecs.umich.edu#include "base/loader/elf_object.hh" 375081Sgblack@eecs.umich.edu#include "base/loader/object_file.hh" 385081Sgblack@eecs.umich.edu#include "base/logging.hh" 395081Sgblack@eecs.umich.edu#include "cpu/thread_context.hh" 405081Sgblack@eecs.umich.edu#include "debug/Loader.hh" 415081Sgblack@eecs.umich.edu#include "mem/page_table.hh" 425081Sgblack@eecs.umich.edu#include "params/Process.hh" 435081Sgblack@eecs.umich.edu#include "sim/aux_vector.hh" 445081Sgblack@eecs.umich.edu#include "sim/process.hh" 455081Sgblack@eecs.umich.edu#include "sim/process_impl.hh" 465081Sgblack@eecs.umich.edu#include "sim/syscall_return.hh" 475081Sgblack@eecs.umich.edu#include "sim/system.hh" 485081Sgblack@eecs.umich.edu 495081Sgblack@eecs.umich.eduusing namespace std; 505081Sgblack@eecs.umich.eduusing namespace MipsISA; 515081Sgblack@eecs.umich.edu 525081Sgblack@eecs.umich.eduMipsProcess::MipsProcess(ProcessParams *params, ObjectFile *objFile) 535081Sgblack@eecs.umich.edu : Process(params, 545081Sgblack@eecs.umich.edu new EmulationPageTable(params->name, params->pid, PageBytes), 555081Sgblack@eecs.umich.edu objFile) 565081Sgblack@eecs.umich.edu{ 575081Sgblack@eecs.umich.edu fatal_if(params->useArchPT, "Arch page tables not implemented."); 585081Sgblack@eecs.umich.edu // Set up stack. On MIPS, stack starts at the top of kuseg 595081Sgblack@eecs.umich.edu // user address space. MIPS stack grows down from here 605081Sgblack@eecs.umich.edu Addr stack_base = 0x7FFFFFFF; 615081Sgblack@eecs.umich.edu 625081Sgblack@eecs.umich.edu Addr max_stack_size = 8 * 1024 * 1024; 635081Sgblack@eecs.umich.edu 645081Sgblack@eecs.umich.edu // Set pointer for next thread stack. Reserve 8M for main stack. 655081Sgblack@eecs.umich.edu Addr next_thread_stack_base = stack_base - max_stack_size; 665081Sgblack@eecs.umich.edu 675081Sgblack@eecs.umich.edu // Set up break point (Top of Heap) 685081Sgblack@eecs.umich.edu Addr brk_point = objFile->dataBase() + objFile->dataSize() + 695081Sgblack@eecs.umich.edu objFile->bssSize(); 705081Sgblack@eecs.umich.edu brk_point = roundUp(brk_point, PageBytes); 715081Sgblack@eecs.umich.edu 725081Sgblack@eecs.umich.edu // Set up region for mmaps. Start it 1GB above the top of the heap. 735081Sgblack@eecs.umich.edu Addr mmap_end = brk_point + 0x40000000L; 745081Sgblack@eecs.umich.edu 755081Sgblack@eecs.umich.edu memState = make_shared<MemState>(brk_point, stack_base, max_stack_size, 765081Sgblack@eecs.umich.edu next_thread_stack_base, mmap_end); 775081Sgblack@eecs.umich.edu} 785081Sgblack@eecs.umich.edu 795081Sgblack@eecs.umich.eduvoid 805081Sgblack@eecs.umich.eduMipsProcess::initState() 815081Sgblack@eecs.umich.edu{ 825081Sgblack@eecs.umich.edu Process::initState(); 835081Sgblack@eecs.umich.edu 845081Sgblack@eecs.umich.edu argsInit<uint32_t>(PageBytes); 855081Sgblack@eecs.umich.edu} 865081Sgblack@eecs.umich.edu 875081Sgblack@eecs.umich.edutemplate<class IntType> 885081Sgblack@eecs.umich.eduvoid 895081Sgblack@eecs.umich.eduMipsProcess::argsInit(int pageSize) 905081Sgblack@eecs.umich.edu{ 915081Sgblack@eecs.umich.edu int intSize = sizeof(IntType); 925081Sgblack@eecs.umich.edu 935081Sgblack@eecs.umich.edu // Patch the ld_bias for dynamic executables. 945081Sgblack@eecs.umich.edu updateBias(); 955081Sgblack@eecs.umich.edu 965081Sgblack@eecs.umich.edu // load object file into target memory 975081Sgblack@eecs.umich.edu objFile->loadSections(initVirtMem); 985081Sgblack@eecs.umich.edu 995081Sgblack@eecs.umich.edu typedef AuxVector<IntType> auxv_t; 1005081Sgblack@eecs.umich.edu std::vector<auxv_t> auxv; 1015081Sgblack@eecs.umich.edu 1025081Sgblack@eecs.umich.edu ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile); 1035081Sgblack@eecs.umich.edu if (elfObject) 1045081Sgblack@eecs.umich.edu { 1055081Sgblack@eecs.umich.edu // Set the system page size 1065081Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_PAGESZ, MipsISA::PageBytes)); 1075081Sgblack@eecs.umich.edu // Set the frequency at which time() increments 1085081Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_CLKTCK, 100)); 1095081Sgblack@eecs.umich.edu // For statically linked executables, this is the virtual 1105081Sgblack@eecs.umich.edu // address of the program header tables if they appear in the 1115081Sgblack@eecs.umich.edu // executable image. 1125081Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable())); 1135081Sgblack@eecs.umich.edu DPRINTF(Loader, "auxv at PHDR %08p\n", elfObject->programHeaderTable()); 1145081Sgblack@eecs.umich.edu // This is the size of a program header entry from the elf file. 1155081Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_PHENT, elfObject->programHeaderSize())); 1165081Sgblack@eecs.umich.edu // This is the number of program headers from the original elf file. 1175081Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_PHNUM, elfObject->programHeaderCount())); 1185081Sgblack@eecs.umich.edu // This is the base address of the ELF interpreter; it should be 1195081Sgblack@eecs.umich.edu // zero for static executables or contain the base address for 1205081Sgblack@eecs.umich.edu // dynamic executables. 1215081Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_BASE, getBias())); 1225081Sgblack@eecs.umich.edu //The entry point to the program 1235081Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint())); 1245081Sgblack@eecs.umich.edu //Different user and group IDs 1255081Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_UID, uid())); 1265081Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_EUID, euid())); 1275081Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_GID, gid())); 1285081Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_EGID, egid())); 1295081Sgblack@eecs.umich.edu } 1305081Sgblack@eecs.umich.edu 1315081Sgblack@eecs.umich.edu // Calculate how much space we need for arg & env & auxv arrays. 1325081Sgblack@eecs.umich.edu int argv_array_size = intSize * (argv.size() + 1); 1335081Sgblack@eecs.umich.edu int envp_array_size = intSize * (envp.size() + 1); 1345081Sgblack@eecs.umich.edu int auxv_array_size = intSize * 2 * (auxv.size() + 1); 1355081Sgblack@eecs.umich.edu 1365081Sgblack@eecs.umich.edu int arg_data_size = 0; 1375081Sgblack@eecs.umich.edu for (vector<string>::size_type i = 0; i < argv.size(); ++i) { 1385081Sgblack@eecs.umich.edu arg_data_size += argv[i].size() + 1; 1395081Sgblack@eecs.umich.edu } 1405081Sgblack@eecs.umich.edu int env_data_size = 0; 1415081Sgblack@eecs.umich.edu for (vector<string>::size_type i = 0; i < envp.size(); ++i) { 1425081Sgblack@eecs.umich.edu env_data_size += envp[i].size() + 1; 1435081Sgblack@eecs.umich.edu } 1445081Sgblack@eecs.umich.edu 1455081Sgblack@eecs.umich.edu int space_needed = 1465081Sgblack@eecs.umich.edu argv_array_size + 1475081Sgblack@eecs.umich.edu envp_array_size + 1485081Sgblack@eecs.umich.edu auxv_array_size + 1495081Sgblack@eecs.umich.edu arg_data_size + 1505081Sgblack@eecs.umich.edu env_data_size; 1515081Sgblack@eecs.umich.edu 1525081Sgblack@eecs.umich.edu // set bottom of stack 1535081Sgblack@eecs.umich.edu memState->setStackMin(memState->getStackBase() - space_needed); 1545081Sgblack@eecs.umich.edu // align it 1555081Sgblack@eecs.umich.edu memState->setStackMin(roundDown(memState->getStackMin(), pageSize)); 1565081Sgblack@eecs.umich.edu memState->setStackSize(memState->getStackBase() - memState->getStackMin()); 1575081Sgblack@eecs.umich.edu // map memory 1585081Sgblack@eecs.umich.edu allocateMem(memState->getStackMin(), roundUp(memState->getStackSize(), 1595081Sgblack@eecs.umich.edu pageSize)); 1605081Sgblack@eecs.umich.edu 1615081Sgblack@eecs.umich.edu // map out initial stack contents; leave room for argc 1625081Sgblack@eecs.umich.edu IntType argv_array_base = memState->getStackMin() + intSize; 1635081Sgblack@eecs.umich.edu IntType envp_array_base = argv_array_base + argv_array_size; 1645081Sgblack@eecs.umich.edu IntType auxv_array_base = envp_array_base + envp_array_size; 1655081Sgblack@eecs.umich.edu IntType arg_data_base = auxv_array_base + auxv_array_size; 1665081Sgblack@eecs.umich.edu IntType env_data_base = arg_data_base + arg_data_size; 1675081Sgblack@eecs.umich.edu 1685081Sgblack@eecs.umich.edu // write contents to stack 1695081Sgblack@eecs.umich.edu IntType argc = argv.size(); 1705081Sgblack@eecs.umich.edu 1715081Sgblack@eecs.umich.edu argc = htog((IntType)argc); 1725081Sgblack@eecs.umich.edu 1735081Sgblack@eecs.umich.edu initVirtMem.writeBlob(memState->getStackMin(), (uint8_t*)&argc, intSize); 1745081Sgblack@eecs.umich.edu 1755081Sgblack@eecs.umich.edu copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem); 1765081Sgblack@eecs.umich.edu 1775081Sgblack@eecs.umich.edu copyStringArray(envp, envp_array_base, env_data_base, initVirtMem); 1785081Sgblack@eecs.umich.edu 1795081Sgblack@eecs.umich.edu // Copy the aux vector 1805081Sgblack@eecs.umich.edu for (typename vector<auxv_t>::size_type x = 0; x < auxv.size(); x++) { 1815081Sgblack@eecs.umich.edu initVirtMem.writeBlob(auxv_array_base + x * 2 * intSize, 1825081Sgblack@eecs.umich.edu (uint8_t*)&(auxv[x].a_type), intSize); 1835081Sgblack@eecs.umich.edu initVirtMem.writeBlob(auxv_array_base + (x * 2 + 1) * intSize, 1845081Sgblack@eecs.umich.edu (uint8_t*)&(auxv[x].a_val), intSize); 1855081Sgblack@eecs.umich.edu } 1865081Sgblack@eecs.umich.edu 1875081Sgblack@eecs.umich.edu // Write out the terminating zeroed auxilliary vector 1885081Sgblack@eecs.umich.edu for (unsigned i = 0; i < 2; i++) { 1895081Sgblack@eecs.umich.edu const IntType zero = 0; 1905081Sgblack@eecs.umich.edu const Addr addr = auxv_array_base + 2 * intSize * (auxv.size() + i); 1915081Sgblack@eecs.umich.edu initVirtMem.writeBlob(addr, (uint8_t*)&zero, intSize); 1925081Sgblack@eecs.umich.edu } 1935081Sgblack@eecs.umich.edu 1945081Sgblack@eecs.umich.edu ThreadContext *tc = system->getThreadContext(contextIds[0]); 1955081Sgblack@eecs.umich.edu 1965081Sgblack@eecs.umich.edu setSyscallArg(tc, 0, argc); 1975081Sgblack@eecs.umich.edu setSyscallArg(tc, 1, argv_array_base); 1985081Sgblack@eecs.umich.edu tc->setIntReg(StackPointerReg, memState->getStackMin()); 1995081Sgblack@eecs.umich.edu 2005081Sgblack@eecs.umich.edu tc->pcState(getStartPC()); 2015081Sgblack@eecs.umich.edu} 2025081Sgblack@eecs.umich.edu 2035081Sgblack@eecs.umich.edu 2045081Sgblack@eecs.umich.eduMipsISA::IntReg 2055081Sgblack@eecs.umich.eduMipsProcess::getSyscallArg(ThreadContext *tc, int &i) 2065081Sgblack@eecs.umich.edu{ 2075081Sgblack@eecs.umich.edu assert(i < 6); 2085081Sgblack@eecs.umich.edu return tc->readIntReg(FirstArgumentReg + i++); 2095081Sgblack@eecs.umich.edu} 2105081Sgblack@eecs.umich.edu 2115081Sgblack@eecs.umich.eduvoid 2125081Sgblack@eecs.umich.eduMipsProcess::setSyscallArg(ThreadContext *tc, int i, MipsISA::IntReg val) 2135081Sgblack@eecs.umich.edu{ 2145081Sgblack@eecs.umich.edu assert(i < 6); 2155081Sgblack@eecs.umich.edu tc->setIntReg(FirstArgumentReg + i, val); 2165081Sgblack@eecs.umich.edu} 2175081Sgblack@eecs.umich.edu 2185081Sgblack@eecs.umich.eduvoid 2195081Sgblack@eecs.umich.eduMipsProcess::setSyscallReturn(ThreadContext *tc, SyscallReturn sysret) 2205081Sgblack@eecs.umich.edu{ 2215081Sgblack@eecs.umich.edu if (sysret.successful()) { 2225081Sgblack@eecs.umich.edu // no error 2235081Sgblack@eecs.umich.edu tc->setIntReg(SyscallSuccessReg, 0); 2245081Sgblack@eecs.umich.edu tc->setIntReg(ReturnValueReg, sysret.returnValue()); 2255081Sgblack@eecs.umich.edu } else { 2265081Sgblack@eecs.umich.edu // got an error, return details 2275081Sgblack@eecs.umich.edu tc->setIntReg(SyscallSuccessReg, (IntReg) -1); 2285081Sgblack@eecs.umich.edu tc->setIntReg(ReturnValueReg, sysret.errnoValue()); 2295081Sgblack@eecs.umich.edu } 2305081Sgblack@eecs.umich.edu} 2315081Sgblack@eecs.umich.edu