process.cc revision 12441
14123Sbinkertn@umich.edu/* 24123Sbinkertn@umich.edu * Copyright (c) 2003-2004 The Regents of The University of Michigan 39983Sstever@gmail.com * All rights reserved. 49983Sstever@gmail.com * 54123Sbinkertn@umich.edu * Redistribution and use in source and binary forms, with or without 64123Sbinkertn@umich.edu * modification, are permitted provided that the following conditions are 74123Sbinkertn@umich.edu * met: redistributions of source code must retain the above copyright 84123Sbinkertn@umich.edu * notice, this list of conditions and the following disclaimer; 94123Sbinkertn@umich.edu * redistributions in binary form must reproduce the above copyright 104123Sbinkertn@umich.edu * notice, this list of conditions and the following disclaimer in the 114123Sbinkertn@umich.edu * documentation and/or other materials provided with the distribution; 124123Sbinkertn@umich.edu * neither the name of the copyright holders nor the names of its 134123Sbinkertn@umich.edu * contributors may be used to endorse or promote products derived from 144123Sbinkertn@umich.edu * this software without specific prior written permission. 154123Sbinkertn@umich.edu * 164123Sbinkertn@umich.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 174123Sbinkertn@umich.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 184123Sbinkertn@umich.edu * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 194123Sbinkertn@umich.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 204123Sbinkertn@umich.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 214123Sbinkertn@umich.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 224123Sbinkertn@umich.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 234123Sbinkertn@umich.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 244123Sbinkertn@umich.edu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 254123Sbinkertn@umich.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 264123Sbinkertn@umich.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 274123Sbinkertn@umich.edu * 284123Sbinkertn@umich.edu * Authors: Gabe Black 294123Sbinkertn@umich.edu * Ali Saidi 304123Sbinkertn@umich.edu */ 314123Sbinkertn@umich.edu 324123Sbinkertn@umich.edu#include "arch/alpha/process.hh" 334123Sbinkertn@umich.edu 349983Sstever@gmail.com#include "arch/alpha/isa_traits.hh" 359983Sstever@gmail.com#include "base/loader/elf_object.hh" 369983Sstever@gmail.com#include "base/loader/object_file.hh" 374123Sbinkertn@umich.edu#include "base/logging.hh" 384123Sbinkertn@umich.edu#include "cpu/thread_context.hh" 396216Snate@binkert.org#include "debug/Loader.hh" 404123Sbinkertn@umich.edu#include "mem/page_table.hh" 419356Snilay@cs.wisc.edu#include "params/Process.hh" 424123Sbinkertn@umich.edu#include "sim/aux_vector.hh" 434123Sbinkertn@umich.edu#include "sim/byteswap.hh" 444123Sbinkertn@umich.edu#include "sim/process_impl.hh" 456216Snate@binkert.org#include "sim/syscall_return.hh" 464123Sbinkertn@umich.edu#include "sim/system.hh" 479983Sstever@gmail.com 489983Sstever@gmail.comusing namespace AlphaISA; 499983Sstever@gmail.comusing namespace std; 509983Sstever@gmail.com 519983Sstever@gmail.comAlphaProcess::AlphaProcess(ProcessParams *params, ObjectFile *objFile) 529983Sstever@gmail.com : Process(params, new FuncPageTable(params->name, params->pid, PageBytes), 539983Sstever@gmail.com objFile) 549983Sstever@gmail.com{ 559983Sstever@gmail.com fatal_if(params->useArchPT, "Arch page tables not implemented."); 569983Sstever@gmail.com Addr brk_point = objFile->dataBase() + objFile->dataSize() + 579983Sstever@gmail.com objFile->bssSize(); 589983Sstever@gmail.com brk_point = roundUp(brk_point, PageBytes); 599983Sstever@gmail.com 609983Sstever@gmail.com // Set up stack. On Alpha, stack goes below text section. This 619983Sstever@gmail.com // code should get moved to some architecture-specific spot. 629983Sstever@gmail.com Addr stack_base = objFile->textBase() - (409600+4096); 639983Sstever@gmail.com 649983Sstever@gmail.com // Set up region for mmaps. 659983Sstever@gmail.com Addr mmap_end = 0x10000; 669983Sstever@gmail.com 679983Sstever@gmail.com Addr max_stack_size = 8 * 1024 * 1024; 689983Sstever@gmail.com 699983Sstever@gmail.com // Set pointer for next thread stack. Reserve 8M for main stack. 709983Sstever@gmail.com Addr next_thread_stack_base = stack_base - max_stack_size; 719983Sstever@gmail.com 729983Sstever@gmail.com memState = make_shared<MemState>(brk_point, stack_base, max_stack_size, 739983Sstever@gmail.com next_thread_stack_base, mmap_end); 744123Sbinkertn@umich.edu} 754123Sbinkertn@umich.edu 764123Sbinkertn@umich.eduvoid 774123Sbinkertn@umich.eduAlphaProcess::argsInit(int intSize, int pageSize) 784123Sbinkertn@umich.edu{ 799983Sstever@gmail.com // Patch the ld_bias for dynamic executables. 804123Sbinkertn@umich.edu updateBias(); 814123Sbinkertn@umich.edu 829983Sstever@gmail.com objFile->loadSections(initVirtMem); 839983Sstever@gmail.com 849983Sstever@gmail.com typedef AuxVector<uint64_t> auxv_t; 859983Sstever@gmail.com std::vector<auxv_t> auxv; 869983Sstever@gmail.com 879983Sstever@gmail.com ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile); 889983Sstever@gmail.com if (elfObject) 899983Sstever@gmail.com { 909983Sstever@gmail.com // modern glibc uses a bunch of auxiliary vectors to set up 919983Sstever@gmail.com // TLS as well as do a bunch of other stuff 929983Sstever@gmail.com // these vectors go on the bottom of the stack, below argc/argv/envp 939983Sstever@gmail.com // pointers but above actual arg strings 949983Sstever@gmail.com // I don't have all the ones glibc looks at here, but so far it doesn't 959983Sstever@gmail.com // seem to be a problem. 969983Sstever@gmail.com // check out _dl_aux_init() in glibc/elf/dl-support.c for details 979983Sstever@gmail.com // --Lisa 989983Sstever@gmail.com auxv.push_back(auxv_t(M5_AT_PAGESZ, AlphaISA::PageBytes)); 999983Sstever@gmail.com auxv.push_back(auxv_t(M5_AT_CLKTCK, 100)); 1009983Sstever@gmail.com auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable())); 1017823Ssteve.reinhardt@amd.com DPRINTF(Loader, "auxv at PHDR %08p\n", elfObject->programHeaderTable()); 1024123Sbinkertn@umich.edu auxv.push_back(auxv_t(M5_AT_PHNUM, elfObject->programHeaderCount())); 1039174Satgutier@umich.edu // This is the base address of the ELF interpreter; it should be 1049174Satgutier@umich.edu // zero for static executables or contain the base address for 1059174Satgutier@umich.edu // dynamic executables. 1064123Sbinkertn@umich.edu auxv.push_back(auxv_t(M5_AT_BASE, getBias())); 1074123Sbinkertn@umich.edu auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint())); 1089983Sstever@gmail.com auxv.push_back(auxv_t(M5_AT_UID, uid())); 1099983Sstever@gmail.com auxv.push_back(auxv_t(M5_AT_EUID, euid())); 1109983Sstever@gmail.com auxv.push_back(auxv_t(M5_AT_GID, gid())); 1119983Sstever@gmail.com auxv.push_back(auxv_t(M5_AT_EGID, egid())); 1129983Sstever@gmail.com 1139983Sstever@gmail.com } 1149983Sstever@gmail.com 1159983Sstever@gmail.com // Calculate how much space we need for arg & env & auxv arrays. 1169983Sstever@gmail.com int argv_array_size = intSize * (argv.size() + 1); 1179983Sstever@gmail.com int envp_array_size = intSize * (envp.size() + 1); 1189983Sstever@gmail.com int auxv_array_size = intSize * 2 * (auxv.size() + 1); 1199983Sstever@gmail.com 1209983Sstever@gmail.com int arg_data_size = 0; 1219983Sstever@gmail.com for (vector<string>::size_type i = 0; i < argv.size(); ++i) { 1229983Sstever@gmail.com arg_data_size += argv[i].size() + 1; 1239983Sstever@gmail.com } 1249983Sstever@gmail.com int env_data_size = 0; 1259983Sstever@gmail.com for (vector<string>::size_type i = 0; i < envp.size(); ++i) { 1269983Sstever@gmail.com env_data_size += envp[i].size() + 1; 1279983Sstever@gmail.com } 1289983Sstever@gmail.com 1299983Sstever@gmail.com int space_needed = 1309983Sstever@gmail.com argv_array_size + 1319983Sstever@gmail.com envp_array_size + 1329983Sstever@gmail.com auxv_array_size + 1339983Sstever@gmail.com arg_data_size + 1349983Sstever@gmail.com env_data_size; 1359983Sstever@gmail.com 1369983Sstever@gmail.com if (space_needed < 32*1024) 1379983Sstever@gmail.com space_needed = 32*1024; 1389983Sstever@gmail.com 1399983Sstever@gmail.com // set bottom of stack 1409983Sstever@gmail.com memState->setStackMin(memState->getStackBase() - space_needed); 1419983Sstever@gmail.com // align it 1429983Sstever@gmail.com memState->setStackMin(roundDown(memState->getStackMin(), pageSize)); 1439983Sstever@gmail.com memState->setStackSize(memState->getStackBase() - memState->getStackMin()); 1449983Sstever@gmail.com // map memory 1459983Sstever@gmail.com allocateMem(memState->getStackMin(), roundUp(memState->getStackSize(), 1469983Sstever@gmail.com pageSize)); 1479983Sstever@gmail.com 1489983Sstever@gmail.com // map out initial stack contents 1499983Sstever@gmail.com Addr argv_array_base = memState->getStackMin() + intSize; // room for argc 1509983Sstever@gmail.com Addr envp_array_base = argv_array_base + argv_array_size; 1519983Sstever@gmail.com Addr auxv_array_base = envp_array_base + envp_array_size; 1529983Sstever@gmail.com Addr arg_data_base = auxv_array_base + auxv_array_size; 1539983Sstever@gmail.com Addr env_data_base = arg_data_base + arg_data_size; 1549983Sstever@gmail.com 1559983Sstever@gmail.com // write contents to stack 1569983Sstever@gmail.com uint64_t argc = argv.size(); 1579983Sstever@gmail.com if (intSize == 8) 1589983Sstever@gmail.com argc = htog((uint64_t)argc); 1599983Sstever@gmail.com else if (intSize == 4) 1609983Sstever@gmail.com argc = htog((uint32_t)argc); 1619983Sstever@gmail.com else 1629983Sstever@gmail.com panic("Unknown int size"); 1639983Sstever@gmail.com 1649983Sstever@gmail.com initVirtMem.writeBlob(memState->getStackMin(), (uint8_t*)&argc, intSize); 1659983Sstever@gmail.com 1669983Sstever@gmail.com copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem); 1679983Sstever@gmail.com copyStringArray(envp, envp_array_base, env_data_base, initVirtMem); 1689983Sstever@gmail.com 1699983Sstever@gmail.com //Copy the aux stuff 1709983Sstever@gmail.com for (vector<auxv_t>::size_type x = 0; x < auxv.size(); x++) { 1719983Sstever@gmail.com initVirtMem.writeBlob(auxv_array_base + x * 2 * intSize, 1729983Sstever@gmail.com (uint8_t*)&(auxv[x].a_type), intSize); 1739983Sstever@gmail.com initVirtMem.writeBlob(auxv_array_base + (x * 2 + 1) * intSize, 1749983Sstever@gmail.com (uint8_t*)&(auxv[x].a_val), intSize); 1759983Sstever@gmail.com } 1769983Sstever@gmail.com 1779983Sstever@gmail.com ThreadContext *tc = system->getThreadContext(contextIds[0]); 1789983Sstever@gmail.com 1799983Sstever@gmail.com setSyscallArg(tc, 0, argc); 1809983Sstever@gmail.com setSyscallArg(tc, 1, argv_array_base); 1819983Sstever@gmail.com tc->setIntReg(StackPointerReg, memState->getStackMin()); 1829983Sstever@gmail.com 1839983Sstever@gmail.com tc->pcState(getStartPC()); 1849983Sstever@gmail.com} 1859983Sstever@gmail.com 1869983Sstever@gmail.comvoid 1874123Sbinkertn@umich.eduAlphaProcess::setupASNReg() 1884123Sbinkertn@umich.edu{ 1894123Sbinkertn@umich.edu ThreadContext *tc = system->getThreadContext(contextIds[0]); 1904123Sbinkertn@umich.edu tc->setMiscRegNoEffect(IPR_DTB_ASN, _pid << 57); 1919983Sstever@gmail.com} 1929983Sstever@gmail.com 1934123Sbinkertn@umich.edu 1944123Sbinkertn@umich.eduvoid 1959983Sstever@gmail.comAlphaProcess::unserialize(CheckpointIn &cp) 1964123Sbinkertn@umich.edu{ 1979983Sstever@gmail.com Process::unserialize(cp); 1984123Sbinkertn@umich.edu // need to set up ASN after unserialization since _pid value may 1994123Sbinkertn@umich.edu // come from checkpoint 2009983Sstever@gmail.com setupASNReg(); 2014123Sbinkertn@umich.edu} 2024123Sbinkertn@umich.edu 2037822Ssteve.reinhardt@amd.com 2044123Sbinkertn@umich.eduvoid 2054123Sbinkertn@umich.eduAlphaProcess::initState() 2064123Sbinkertn@umich.edu{ 2074123Sbinkertn@umich.edu // need to set up ASN before further initialization since init 2084123Sbinkertn@umich.edu // will involve writing to virtual memory addresses 2094123Sbinkertn@umich.edu setupASNReg(); 2104123Sbinkertn@umich.edu 2114123Sbinkertn@umich.edu Process::initState(); 2124123Sbinkertn@umich.edu 2134123Sbinkertn@umich.edu argsInit(MachineBytes, PageBytes); 2144123Sbinkertn@umich.edu 2154123Sbinkertn@umich.edu ThreadContext *tc = system->getThreadContext(contextIds[0]); 2164123Sbinkertn@umich.edu tc->setIntReg(GlobalPointerReg, objFile->globalPointer()); 2174123Sbinkertn@umich.edu //Operate in user mode 2184123Sbinkertn@umich.edu tc->setMiscRegNoEffect(IPR_ICM, mode_user << 3); 2194123Sbinkertn@umich.edu tc->setMiscRegNoEffect(IPR_DTB_CM, mode_user << 3); 2204123Sbinkertn@umich.edu //No super page mapping 2214123Sbinkertn@umich.edu tc->setMiscRegNoEffect(IPR_MCSR, 0); 2224123Sbinkertn@umich.edu} 2234123Sbinkertn@umich.edu 2244123Sbinkertn@umich.eduAlphaISA::IntReg 2254123Sbinkertn@umich.eduAlphaProcess::getSyscallArg(ThreadContext *tc, int &i) 2264123Sbinkertn@umich.edu{ 2274123Sbinkertn@umich.edu assert(i < 6); 228 return tc->readIntReg(FirstArgumentReg + i++); 229} 230 231void 232AlphaProcess::setSyscallArg(ThreadContext *tc, int i, AlphaISA::IntReg val) 233{ 234 assert(i < 6); 235 tc->setIntReg(FirstArgumentReg + i, val); 236} 237 238void 239AlphaProcess::setSyscallReturn(ThreadContext *tc, SyscallReturn sysret) 240{ 241 // check for error condition. Alpha syscall convention is to 242 // indicate success/failure in reg a3 (r19) and put the 243 // return value itself in the standard return value reg (v0). 244 if (sysret.successful()) { 245 // no error 246 tc->setIntReg(SyscallSuccessReg, 0); 247 tc->setIntReg(ReturnValueReg, sysret.returnValue()); 248 } else { 249 // got an error, return details 250 tc->setIntReg(SyscallSuccessReg, (IntReg)-1); 251 tc->setIntReg(ReturnValueReg, sysret.errnoValue()); 252 } 253} 254