process.cc revision 7532
1545SN/A/* 22512SN/A * Copyright (c) 2004-2005 The Regents of The University of Michigan 3545SN/A * All rights reserved. 4545SN/A * 5545SN/A * Redistribution and use in source and binary forms, with or without 6545SN/A * modification, are permitted provided that the following conditions are 7545SN/A * met: redistributions of source code must retain the above copyright 8545SN/A * notice, this list of conditions and the following disclaimer; 9545SN/A * redistributions in binary form must reproduce the above copyright 10545SN/A * notice, this list of conditions and the following disclaimer in the 11545SN/A * documentation and/or other materials provided with the distribution; 12545SN/A * neither the name of the copyright holders nor the names of its 13545SN/A * contributors may be used to endorse or promote products derived from 14545SN/A * this software without specific prior written permission. 15545SN/A * 16545SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17545SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18545SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19545SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20545SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21545SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22545SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23545SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24545SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25545SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26545SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 272665Ssaidi@eecs.umich.edu * 282665Ssaidi@eecs.umich.edu * Authors: Gabe Black 292665Ssaidi@eecs.umich.edu * Ali Saidi 30545SN/A * Korey Sewell 31545SN/A */ 323090Sstever@eecs.umich.edu 332657Ssaidi@eecs.umich.edu#include "arch/mips/isa_traits.hh" 34545SN/A#include "arch/mips/process.hh" 352901Ssaidi@eecs.umich.edu 36545SN/A#include "base/loader/object_file.hh" 372489SN/A#include "base/loader/elf_object.hh" 382901Ssaidi@eecs.umich.edu#include "base/misc.hh" 393401Sktlim@umich.edu#include "cpu/thread_context.hh" 402489SN/A 412489SN/A#include "mem/page_table.hh" 422489SN/A 432489SN/A#include "sim/process.hh" 443349Sbinkertn@umich.edu#include "sim/process_impl.hh" 452489SN/A#include "sim/system.hh" 463091Sstever@eecs.umich.edu 472489SN/Ausing namespace std; 482489SN/Ausing namespace MipsISA; 492489SN/A 504475Sstever@eecs.umich.eduMipsLiveProcess::MipsLiveProcess(LiveProcessParams * params, 512489SN/A ObjectFile *objFile) 524475Sstever@eecs.umich.edu : LiveProcess(params, objFile) 532521SN/A{ 542489SN/A // Set up stack. On MIPS, stack starts at the top of kuseg 552489SN/A // user address space. MIPS stack grows down from here 562489SN/A stack_base = 0x7FFFFFFF; 574762Snate@binkert.org 584762Snate@binkert.org // Set pointer for next thread stack. Reserve 8M for main stack. 594762Snate@binkert.org next_thread_stack_base = stack_base - (8 * 1024 * 1024); 604762Snate@binkert.org 61545SN/A // Set up break point (Top of Heap) 62545SN/A brk_point = objFile->dataBase() + objFile->dataSize() + objFile->bssSize(); 632384SN/A brk_point = roundUp(brk_point, VMPageSize); 642489SN/A 65545SN/A // Set up region for mmaps. Start it 1GB above the top of the heap. 66545SN/A mmap_start = mmap_end = brk_point + 0x40000000L; 672542SN/A} 682541SN/A 692541SN/Avoid 702541SN/AMipsLiveProcess::initState() 712541SN/A{ 722541SN/A LiveProcess::initState(); 732541SN/A 742541SN/A argsInit<uint32_t>(VMPageSize); 752901Ssaidi@eecs.umich.edu} 762901Ssaidi@eecs.umich.edu 772901Ssaidi@eecs.umich.edutemplate<class IntType> 782901Ssaidi@eecs.umich.eduvoid 792901Ssaidi@eecs.umich.eduMipsLiveProcess::argsInit(int pageSize) 802901Ssaidi@eecs.umich.edu{ 812901Ssaidi@eecs.umich.edu int intSize = sizeof(IntType); 822901Ssaidi@eecs.umich.edu 832901Ssaidi@eecs.umich.edu // load object file into target memory 842901Ssaidi@eecs.umich.edu objFile->loadSections(initVirtMem); 852901Ssaidi@eecs.umich.edu 862901Ssaidi@eecs.umich.edu typedef AuxVector<IntType> auxv_t; 872901Ssaidi@eecs.umich.edu std::vector<auxv_t> auxv; 884762Snate@binkert.org 894762Snate@binkert.org ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile); 904762Snate@binkert.org if (elfObject) 914762Snate@binkert.org { 924762Snate@binkert.org // Set the system page size 932539SN/A auxv.push_back(auxv_t(M5_AT_PAGESZ, MipsISA::VMPageSize)); 942539SN/A // Set the frequency at which time() increments 952539SN/A auxv.push_back(auxv_t(M5_AT_CLKTCK, 100)); 962539SN/A // For statically linked executables, this is the virtual 972539SN/A // address of the program header tables if they appear in the 982539SN/A // executable image. 992539SN/A auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable())); 1002539SN/A DPRINTF(Loader, "auxv at PHDR %08p\n", elfObject->programHeaderTable()); 1012489SN/A // This is the size of a program header entry from the elf file. 1022901Ssaidi@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_PHENT, elfObject->programHeaderSize())); 1033401Sktlim@umich.edu // This is the number of program headers from the original elf file. 1044435Ssaidi@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_PHNUM, elfObject->programHeaderCount())); 1054435Ssaidi@eecs.umich.edu //The entry point to the program 1062489SN/A auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint())); 1072489SN/A //Different user and group IDs 1082489SN/A auxv.push_back(auxv_t(M5_AT_UID, uid())); 1093349Sbinkertn@umich.edu auxv.push_back(auxv_t(M5_AT_EUID, euid())); 1102384SN/A auxv.push_back(auxv_t(M5_AT_GID, gid())); 1114870Sstever@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_EGID, egid())); 1124739Sstever@eecs.umich.edu } 1134739Sstever@eecs.umich.edu 1144435Ssaidi@eecs.umich.edu // Calculate how much space we need for arg & env & auxv arrays. 1154435Ssaidi@eecs.umich.edu int argv_array_size = intSize * (argv.size() + 1); 1164435Ssaidi@eecs.umich.edu int envp_array_size = intSize * (envp.size() + 1); 1174435Ssaidi@eecs.umich.edu int auxv_array_size = intSize * 2 * (auxv.size() + 1); 1184435Ssaidi@eecs.umich.edu 1194435Ssaidi@eecs.umich.edu int arg_data_size = 0; 1204437Ssaidi@eecs.umich.edu for (vector<string>::size_type i = 0; i < argv.size(); ++i) { 1214435Ssaidi@eecs.umich.edu arg_data_size += argv[i].size() + 1; 1224435Ssaidi@eecs.umich.edu } 1234435Ssaidi@eecs.umich.edu int env_data_size = 0; 1242685Ssaidi@eecs.umich.edu for (vector<string>::size_type i = 0; i < envp.size(); ++i) { 1254435Ssaidi@eecs.umich.edu env_data_size += envp[i].size() + 1; 1262685Ssaidi@eecs.umich.edu } 1272565SN/A 1284435Ssaidi@eecs.umich.edu int space_needed = 1294435Ssaidi@eecs.umich.edu argv_array_size + 1304739Sstever@eecs.umich.edu envp_array_size + 1314739Sstever@eecs.umich.edu auxv_array_size + 1322641Sstever@eecs.umich.edu arg_data_size + 1332685Ssaidi@eecs.umich.edu env_data_size; 1342685Ssaidi@eecs.umich.edu 1352685Ssaidi@eecs.umich.edu // set bottom of stack 1362657Ssaidi@eecs.umich.edu stack_min = stack_base - space_needed; 1372685Ssaidi@eecs.umich.edu // align it 1382685Ssaidi@eecs.umich.edu stack_min = roundDown(stack_min, pageSize); 1394435Ssaidi@eecs.umich.edu stack_size = stack_base - stack_min; 1402685Ssaidi@eecs.umich.edu // map memory 1415534Ssaidi@eecs.umich.edu pTable->allocate(stack_min, roundUp(stack_size, pageSize)); 1425534Ssaidi@eecs.umich.edu 1435534Ssaidi@eecs.umich.edu // map out initial stack contents 1445534Ssaidi@eecs.umich.edu IntType argv_array_base = stack_min + intSize; // room for argc 1452685Ssaidi@eecs.umich.edu IntType envp_array_base = argv_array_base + argv_array_size; 1462685Ssaidi@eecs.umich.edu IntType auxv_array_base = envp_array_base + envp_array_size; 1472630SN/A IntType arg_data_base = auxv_array_base + auxv_array_size; 1482630SN/A IntType env_data_base = arg_data_base + arg_data_size; 1492901Ssaidi@eecs.umich.edu 1502901Ssaidi@eecs.umich.edu // write contents to stack 1512901Ssaidi@eecs.umich.edu IntType argc = argv.size(); 1522901Ssaidi@eecs.umich.edu 1532901Ssaidi@eecs.umich.edu argc = htog((IntType)argc); 1542569SN/A 1552685Ssaidi@eecs.umich.edu initVirtMem->writeBlob(stack_min, (uint8_t*)&argc, intSize); 1562565SN/A 1572569SN/A copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem); 1582657Ssaidi@eecs.umich.edu 1592384SN/A copyStringArray(envp, envp_array_base, env_data_base, initVirtMem); 160679SN/A 1614762Snate@binkert.org // Copy the aux vector 1624435Ssaidi@eecs.umich.edu for (typename vector<auxv_t>::size_type x = 0; x < auxv.size(); x++) { 1634435Ssaidi@eecs.umich.edu initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize, 1642565SN/A (uint8_t*)&(auxv[x].a_type), intSize); 1652384SN/A initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize, 1662901Ssaidi@eecs.umich.edu (uint8_t*)&(auxv[x].a_val), intSize); 1672901Ssaidi@eecs.umich.edu } 1682901Ssaidi@eecs.umich.edu 1692901Ssaidi@eecs.umich.edu // Write out the terminating zeroed auxilliary vector 1702901Ssaidi@eecs.umich.edu for (unsigned i = 0; i < 2; i++) { 1712901Ssaidi@eecs.umich.edu const IntType zero = 0; 1722901Ssaidi@eecs.umich.edu const Addr addr = auxv_array_base + 2 * intSize * (auxv.size() + i); 1732901Ssaidi@eecs.umich.edu initVirtMem->writeBlob(addr, (uint8_t*)&zero, intSize); 1742901Ssaidi@eecs.umich.edu } 1752901Ssaidi@eecs.umich.edu 1762901Ssaidi@eecs.umich.edu ThreadContext *tc = system->getThreadContext(contextIds[0]); 1772901Ssaidi@eecs.umich.edu 1782901Ssaidi@eecs.umich.edu setSyscallArg(tc, 0, argc); 1792901Ssaidi@eecs.umich.edu setSyscallArg(tc, 1, argv_array_base); 1802901Ssaidi@eecs.umich.edu tc->setIntReg(StackPointerReg, stack_min); 1812901Ssaidi@eecs.umich.edu 1822901Ssaidi@eecs.umich.edu Addr prog_entry = objFile->entryPoint(); 1832901Ssaidi@eecs.umich.edu tc->setPC(prog_entry); 1842901Ssaidi@eecs.umich.edu tc->setNextPC(prog_entry + sizeof(MachInst)); 1852901Ssaidi@eecs.umich.edu tc->setNextNPC(prog_entry + (2 * sizeof(MachInst))); 1862901Ssaidi@eecs.umich.edu} 1872901Ssaidi@eecs.umich.edu 1882901Ssaidi@eecs.umich.edu 1892384SN/AMipsISA::IntReg 1902489SN/AMipsLiveProcess::getSyscallArg(ThreadContext *tc, int &i) 1912489SN/A{ 1924435Ssaidi@eecs.umich.edu assert(i < 6); 1933349Sbinkertn@umich.edu return tc->readIntReg(FirstArgumentReg + i++); 1942659Ssaidi@eecs.umich.edu} 1954435Ssaidi@eecs.umich.edu 1964739Sstever@eecs.umich.eduvoid 1974739Sstever@eecs.umich.eduMipsLiveProcess::setSyscallArg(ThreadContext *tc, 1982659Ssaidi@eecs.umich.edu int i, MipsISA::IntReg val) 1992659Ssaidi@eecs.umich.edu{ 2002659Ssaidi@eecs.umich.edu assert(i < 6); 2012659Ssaidi@eecs.umich.edu tc->setIntReg(FirstArgumentReg + i, val); 2024435Ssaidi@eecs.umich.edu} 2032659Ssaidi@eecs.umich.edu 2044435Ssaidi@eecs.umich.eduvoid 2052659Ssaidi@eecs.umich.eduMipsLiveProcess::setSyscallReturn(ThreadContext *tc, 2062659Ssaidi@eecs.umich.edu SyscallReturn return_value) 2074435Ssaidi@eecs.umich.edu{ 2084435Ssaidi@eecs.umich.edu if (return_value.successful()) { 2094435Ssaidi@eecs.umich.edu // no error 2104435Ssaidi@eecs.umich.edu tc->setIntReg(SyscallSuccessReg, 0); 2114435Ssaidi@eecs.umich.edu tc->setIntReg(ReturnValueReg, return_value.value()); 2124435Ssaidi@eecs.umich.edu } else { 2132657Ssaidi@eecs.umich.edu // got an error, return details 2144435Ssaidi@eecs.umich.edu tc->setIntReg(SyscallSuccessReg, (IntReg) -1); 2154435Ssaidi@eecs.umich.edu tc->setIntReg(ReturnValueReg, -return_value.value()); 2164435Ssaidi@eecs.umich.edu } 2172489SN/A} 2182641Sstever@eecs.umich.edu