process.cc revision 5183
14166Sgblack@eecs.umich.edu/* 24166Sgblack@eecs.umich.edu * Copyright (c) 2003-2006 The Regents of The University of Michigan 34166Sgblack@eecs.umich.edu * All rights reserved. 44166Sgblack@eecs.umich.edu * 54166Sgblack@eecs.umich.edu * Redistribution and use in source and binary forms, with or without 64166Sgblack@eecs.umich.edu * modification, are permitted provided that the following conditions are 74166Sgblack@eecs.umich.edu * met: redistributions of source code must retain the above copyright 84166Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer; 94166Sgblack@eecs.umich.edu * redistributions in binary form must reproduce the above copyright 104166Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer in the 114166Sgblack@eecs.umich.edu * documentation and/or other materials provided with the distribution; 124166Sgblack@eecs.umich.edu * neither the name of the copyright holders nor the names of its 134166Sgblack@eecs.umich.edu * contributors may be used to endorse or promote products derived from 144166Sgblack@eecs.umich.edu * this software without specific prior written permission. 154166Sgblack@eecs.umich.edu * 164166Sgblack@eecs.umich.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 174166Sgblack@eecs.umich.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 184166Sgblack@eecs.umich.edu * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 194166Sgblack@eecs.umich.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 204166Sgblack@eecs.umich.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 214166Sgblack@eecs.umich.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 224166Sgblack@eecs.umich.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 234166Sgblack@eecs.umich.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 244166Sgblack@eecs.umich.edu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 254166Sgblack@eecs.umich.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 264166Sgblack@eecs.umich.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 274166Sgblack@eecs.umich.edu * 284166Sgblack@eecs.umich.edu * Authors: Gabe Black 294166Sgblack@eecs.umich.edu * Ali Saidi 304166Sgblack@eecs.umich.edu */ 314166Sgblack@eecs.umich.edu 324166Sgblack@eecs.umich.edu/* 334166Sgblack@eecs.umich.edu * Copyright (c) 2007 The Hewlett-Packard Development Company 344166Sgblack@eecs.umich.edu * All rights reserved. 354166Sgblack@eecs.umich.edu * 364166Sgblack@eecs.umich.edu * Redistribution and use of this software in source and binary forms, 374166Sgblack@eecs.umich.edu * with or without modification, are permitted provided that the 384166Sgblack@eecs.umich.edu * following conditions are met: 394166Sgblack@eecs.umich.edu * 404166Sgblack@eecs.umich.edu * The software must be used only for Non-Commercial Use which means any 414166Sgblack@eecs.umich.edu * use which is NOT directed to receiving any direct monetary 424166Sgblack@eecs.umich.edu * compensation for, or commercial advantage from such use. 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IN NO EVENT SHALL THE COPYRIGHT 784166Sgblack@eecs.umich.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 794166Sgblack@eecs.umich.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 804166Sgblack@eecs.umich.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 814166Sgblack@eecs.umich.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 824166Sgblack@eecs.umich.edu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 834166Sgblack@eecs.umich.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 844166Sgblack@eecs.umich.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 854166Sgblack@eecs.umich.edu * 864166Sgblack@eecs.umich.edu * Authors: Gabe Black 874166Sgblack@eecs.umich.edu */ 884166Sgblack@eecs.umich.edu 894166Sgblack@eecs.umich.edu#include "arch/x86/isa_traits.hh" 904166Sgblack@eecs.umich.edu#include "arch/x86/process.hh" 914166Sgblack@eecs.umich.edu#include "arch/x86/segmentregs.hh" 924166Sgblack@eecs.umich.edu#include "arch/x86/types.hh" 934166Sgblack@eecs.umich.edu#include "base/loader/object_file.hh" 944166Sgblack@eecs.umich.edu#include "base/loader/elf_object.hh" 954166Sgblack@eecs.umich.edu#include "base/misc.hh" 964166Sgblack@eecs.umich.edu#include "base/trace.hh" 974166Sgblack@eecs.umich.edu#include "cpu/thread_context.hh" 984434Ssaidi@eecs.umich.edu#include "mem/page_table.hh" 994166Sgblack@eecs.umich.edu#include "mem/translating_port.hh" 1004166Sgblack@eecs.umich.edu#include "sim/process_impl.hh" 1014166Sgblack@eecs.umich.edu#include "sim/system.hh" 1024166Sgblack@eecs.umich.edu 1034166Sgblack@eecs.umich.eduusing namespace std; 1044166Sgblack@eecs.umich.eduusing namespace X86ISA; 1054166Sgblack@eecs.umich.edu 1064166Sgblack@eecs.umich.eduM5_64_auxv_t::M5_64_auxv_t(int64_t type, int64_t val) 1074166Sgblack@eecs.umich.edu{ 1084166Sgblack@eecs.umich.edu a_type = TheISA::htog(type); 1094166Sgblack@eecs.umich.edu a_val = TheISA::htog(val); 1104166Sgblack@eecs.umich.edu} 1114166Sgblack@eecs.umich.edu 1124166Sgblack@eecs.umich.eduX86LiveProcess::X86LiveProcess(LiveProcessParams * params, 1134166Sgblack@eecs.umich.edu ObjectFile *objFile) 1144166Sgblack@eecs.umich.edu : LiveProcess(params, objFile) 1154166Sgblack@eecs.umich.edu{ 1164166Sgblack@eecs.umich.edu brk_point = objFile->dataBase() + objFile->dataSize() + objFile->bssSize(); 1174166Sgblack@eecs.umich.edu brk_point = roundUp(brk_point, VMPageSize); 1184166Sgblack@eecs.umich.edu 1194166Sgblack@eecs.umich.edu // Set pointer for next thread stack. Reserve 8M for main stack. 1204166Sgblack@eecs.umich.edu next_thread_stack_base = stack_base - (8 * 1024 * 1024); 1214166Sgblack@eecs.umich.edu 1224166Sgblack@eecs.umich.edu // Set up stack. On X86_64 Linux, stack goes from the top of memory 1234166Sgblack@eecs.umich.edu // downward, less the hole for the kernel address space plus one page 1244166Sgblack@eecs.umich.edu // for undertermined purposes. 1254166Sgblack@eecs.umich.edu stack_base = (Addr)0x7FFFFFFFF000ULL; 1264166Sgblack@eecs.umich.edu 1274166Sgblack@eecs.umich.edu // Set up region for mmaps. This was determined empirically and may not 1284166Sgblack@eecs.umich.edu // always be correct. 1294166Sgblack@eecs.umich.edu mmap_start = mmap_end = 0x2aaaaaaab000; 1304166Sgblack@eecs.umich.edu} 1314166Sgblack@eecs.umich.edu 1324166Sgblack@eecs.umich.eduvoid X86LiveProcess::handleTrap(int trapNum, ThreadContext *tc) 1334166Sgblack@eecs.umich.edu{ 1344166Sgblack@eecs.umich.edu switch(trapNum) 1354166Sgblack@eecs.umich.edu { 1364166Sgblack@eecs.umich.edu default: 1374166Sgblack@eecs.umich.edu panic("Unimplemented trap to operating system: trap number %#x.\n", trapNum); 1384166Sgblack@eecs.umich.edu } 1394166Sgblack@eecs.umich.edu} 1404166Sgblack@eecs.umich.edu 1414166Sgblack@eecs.umich.eduvoid 1424166Sgblack@eecs.umich.eduX86LiveProcess::startup() 1434166Sgblack@eecs.umich.edu{ 1444166Sgblack@eecs.umich.edu if (checkpointRestored) 1454166Sgblack@eecs.umich.edu return; 1464166Sgblack@eecs.umich.edu 1474166Sgblack@eecs.umich.edu argsInit(sizeof(IntReg), VMPageSize); 1484166Sgblack@eecs.umich.edu 1494166Sgblack@eecs.umich.edu for (int i = 0; i < threadContexts.size(); i++) { 1504166Sgblack@eecs.umich.edu ThreadContext * tc = threadContexts[i]; 1514166Sgblack@eecs.umich.edu 1524166Sgblack@eecs.umich.edu SegAttr dataAttr = 0; 1534166Sgblack@eecs.umich.edu dataAttr.writable = 1; 1544166Sgblack@eecs.umich.edu dataAttr.readable = 1; 1554166Sgblack@eecs.umich.edu dataAttr.expandDown = 0; 1564166Sgblack@eecs.umich.edu dataAttr.dpl = 3; 1574166Sgblack@eecs.umich.edu dataAttr.defaultSize = 0; 1584166Sgblack@eecs.umich.edu dataAttr.longMode = 1; 1594166Sgblack@eecs.umich.edu 1604166Sgblack@eecs.umich.edu //Initialize the segment registers. 1614166Sgblack@eecs.umich.edu for(int seg = 0; seg < NUM_SEGMENTREGS; seg++) { 1624166Sgblack@eecs.umich.edu tc->setMiscRegNoEffect(MISCREG_SEG_BASE(seg), 0); 1634166Sgblack@eecs.umich.edu tc->setMiscRegNoEffect(MISCREG_SEG_ATTR(seg), dataAttr); 1644166Sgblack@eecs.umich.edu } 1654166Sgblack@eecs.umich.edu 1664166Sgblack@eecs.umich.edu SegAttr csAttr = 0; 1674166Sgblack@eecs.umich.edu csAttr.writable = 0; 1684166Sgblack@eecs.umich.edu csAttr.readable = 1; 1694166Sgblack@eecs.umich.edu csAttr.expandDown = 0; 1704166Sgblack@eecs.umich.edu csAttr.dpl = 3; 1714166Sgblack@eecs.umich.edu csAttr.defaultSize = 0; 1724166Sgblack@eecs.umich.edu csAttr.longMode = 1; 1734166Sgblack@eecs.umich.edu 1744166Sgblack@eecs.umich.edu tc->setMiscRegNoEffect(MISCREG_CS_ATTR, csAttr); 1754166Sgblack@eecs.umich.edu 1764166Sgblack@eecs.umich.edu //Set up the registers that describe the operating mode. 1774166Sgblack@eecs.umich.edu CR0 cr0 = 0; 1784166Sgblack@eecs.umich.edu cr0.pg = 1; // Turn on paging. 1794166Sgblack@eecs.umich.edu cr0.cd = 0; // Don't disable caching. 1804166Sgblack@eecs.umich.edu cr0.nw = 0; // This is bit is defined to be ignored. 1814166Sgblack@eecs.umich.edu cr0.am = 0; // No alignment checking 1824166Sgblack@eecs.umich.edu cr0.wp = 0; // Supervisor mode can write read only pages 1834166Sgblack@eecs.umich.edu cr0.ne = 1; 1844166Sgblack@eecs.umich.edu cr0.et = 1; // This should always be 1 1854166Sgblack@eecs.umich.edu cr0.ts = 0; // We don't do task switching, so causing fp exceptions 1864166Sgblack@eecs.umich.edu // would be pointless. 1874166Sgblack@eecs.umich.edu cr0.em = 0; // Allow x87 instructions to execute natively. 1884166Sgblack@eecs.umich.edu cr0.mp = 1; // This doesn't really matter, but the manual suggests 1894166Sgblack@eecs.umich.edu // setting it to one. 1904777Sgblack@eecs.umich.edu cr0.pe = 1; // We're definitely in protected mode. 1914777Sgblack@eecs.umich.edu tc->setMiscReg(MISCREG_CR0, cr0); 1924777Sgblack@eecs.umich.edu 1934777Sgblack@eecs.umich.edu Efer efer = 0; 1944777Sgblack@eecs.umich.edu efer.sce = 1; // Enable system call extensions. 1954777Sgblack@eecs.umich.edu efer.lme = 1; // Enable long mode. 1964777Sgblack@eecs.umich.edu efer.lma = 1; // Activate long mode. 1974777Sgblack@eecs.umich.edu efer.nxe = 1; // Enable nx support. 1984166Sgblack@eecs.umich.edu efer.svme = 0; // Disable svm support for now. It isn't implemented. 1994166Sgblack@eecs.umich.edu efer.ffxsr = 1; // Turn on fast fxsave and fxrstor. 2004166Sgblack@eecs.umich.edu tc->setMiscReg(MISCREG_EFER, efer); 2014166Sgblack@eecs.umich.edu } 2024166Sgblack@eecs.umich.edu} 2034166Sgblack@eecs.umich.edu 2044166Sgblack@eecs.umich.eduvoid 2054166Sgblack@eecs.umich.eduX86LiveProcess::argsInit(int intSize, int pageSize) 2064777Sgblack@eecs.umich.edu{ 2074777Sgblack@eecs.umich.edu typedef M5_64_auxv_t auxv_t; 2084166Sgblack@eecs.umich.edu Process::startup(); 2094777Sgblack@eecs.umich.edu 2104166Sgblack@eecs.umich.edu string filename; 2114777Sgblack@eecs.umich.edu if(argv.size() < 1) 2124166Sgblack@eecs.umich.edu filename = ""; 2134166Sgblack@eecs.umich.edu else 2144777Sgblack@eecs.umich.edu filename = argv[0]; 2154166Sgblack@eecs.umich.edu 2164777Sgblack@eecs.umich.edu //We want 16 byte alignment 2174166Sgblack@eecs.umich.edu uint64_t align = 16; 2184777Sgblack@eecs.umich.edu 2194777Sgblack@eecs.umich.edu // load object file into target memory 2204166Sgblack@eecs.umich.edu objFile->loadSections(initVirtMem); 2214166Sgblack@eecs.umich.edu 2224166Sgblack@eecs.umich.edu enum X86CpuFeature { 2234777Sgblack@eecs.umich.edu X86_OnboardFPU = 1 << 0, 2244777Sgblack@eecs.umich.edu X86_VirtualModeExtensions = 1 << 1, 2254777Sgblack@eecs.umich.edu X86_DebuggingExtensions = 1 << 2, 2264777Sgblack@eecs.umich.edu X86_PageSizeExtensions = 1 << 3, 2274166Sgblack@eecs.umich.edu 2284777Sgblack@eecs.umich.edu X86_TimeStampCounter = 1 << 4, 2294166Sgblack@eecs.umich.edu X86_ModelSpecificRegisters = 1 << 5, 2304777Sgblack@eecs.umich.edu X86_PhysicalAddressExtensions = 1 << 6, 2314777Sgblack@eecs.umich.edu X86_MachineCheckExtensions = 1 << 7, 2324777Sgblack@eecs.umich.edu 2334777Sgblack@eecs.umich.edu X86_CMPXCHG8Instruction = 1 << 8, 2344166Sgblack@eecs.umich.edu X86_OnboardAPIC = 1 << 9, 2354777Sgblack@eecs.umich.edu X86_SYSENTER_SYSEXIT = 1 << 11, 2364777Sgblack@eecs.umich.edu 2374777Sgblack@eecs.umich.edu X86_MemoryTypeRangeRegisters = 1 << 12, 2384166Sgblack@eecs.umich.edu X86_PageGlobalEnable = 1 << 13, 2394166Sgblack@eecs.umich.edu X86_MachineCheckArchitecture = 1 << 14, 2404166Sgblack@eecs.umich.edu X86_CMOVInstruction = 1 << 15, 2414166Sgblack@eecs.umich.edu 2424166Sgblack@eecs.umich.edu X86_PageAttributeTable = 1 << 16, 2434166Sgblack@eecs.umich.edu X86_36BitPSEs = 1 << 17, 2444166Sgblack@eecs.umich.edu X86_ProcessorSerialNumber = 1 << 18, 2454166Sgblack@eecs.umich.edu X86_CLFLUSHInstruction = 1 << 19, 2464166Sgblack@eecs.umich.edu 2474166Sgblack@eecs.umich.edu X86_DebugTraceStore = 1 << 21, 2484166Sgblack@eecs.umich.edu X86_ACPIViaMSR = 1 << 22, 2494166Sgblack@eecs.umich.edu X86_MultimediaExtensions = 1 << 23, 2504166Sgblack@eecs.umich.edu 2514166Sgblack@eecs.umich.edu X86_FXSAVE_FXRSTOR = 1 << 24, 2524166Sgblack@eecs.umich.edu X86_StreamingSIMDExtensions = 1 << 25, 2534166Sgblack@eecs.umich.edu X86_StreamingSIMDExtensions2 = 1 << 26, 2544166Sgblack@eecs.umich.edu X86_CPUSelfSnoop = 1 << 27, 2554166Sgblack@eecs.umich.edu 2564166Sgblack@eecs.umich.edu X86_HyperThreading = 1 << 28, 2574166Sgblack@eecs.umich.edu X86_AutomaticClockControl = 1 << 29, 2584166Sgblack@eecs.umich.edu X86_IA64Processor = 1 << 30 2594166Sgblack@eecs.umich.edu }; 2604166Sgblack@eecs.umich.edu 2614166Sgblack@eecs.umich.edu //Setup the auxilliary vectors. These will already have endian conversion. 2624166Sgblack@eecs.umich.edu //Auxilliary vectors are loaded only for elf formatted executables. 2634166Sgblack@eecs.umich.edu ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile); 2644166Sgblack@eecs.umich.edu if(elfObject) 2654166Sgblack@eecs.umich.edu { 2664166Sgblack@eecs.umich.edu uint64_t features = 2674166Sgblack@eecs.umich.edu X86_OnboardFPU | 2684166Sgblack@eecs.umich.edu X86_VirtualModeExtensions | 2694166Sgblack@eecs.umich.edu X86_DebuggingExtensions | 2704166Sgblack@eecs.umich.edu X86_PageSizeExtensions | 2714166Sgblack@eecs.umich.edu X86_TimeStampCounter | 2724166Sgblack@eecs.umich.edu X86_ModelSpecificRegisters | 2734166Sgblack@eecs.umich.edu X86_PhysicalAddressExtensions | 2744166Sgblack@eecs.umich.edu X86_MachineCheckExtensions | 2754166Sgblack@eecs.umich.edu X86_CMPXCHG8Instruction | 2764166Sgblack@eecs.umich.edu X86_OnboardAPIC | 2774166Sgblack@eecs.umich.edu X86_SYSENTER_SYSEXIT | 2784166Sgblack@eecs.umich.edu X86_MemoryTypeRangeRegisters | 2794166Sgblack@eecs.umich.edu X86_PageGlobalEnable | 2804166Sgblack@eecs.umich.edu X86_MachineCheckArchitecture | 2814166Sgblack@eecs.umich.edu X86_CMOVInstruction | 2824166Sgblack@eecs.umich.edu X86_PageAttributeTable | 2834166Sgblack@eecs.umich.edu X86_36BitPSEs | 2844166Sgblack@eecs.umich.edu// X86_ProcessorSerialNumber | 2854166Sgblack@eecs.umich.edu X86_CLFLUSHInstruction | 2864166Sgblack@eecs.umich.edu// X86_DebugTraceStore | 2874166Sgblack@eecs.umich.edu// X86_ACPIViaMSR | 2884607Sgblack@eecs.umich.edu X86_MultimediaExtensions | 2894166Sgblack@eecs.umich.edu X86_FXSAVE_FXRSTOR | 2904166Sgblack@eecs.umich.edu X86_StreamingSIMDExtensions | 2914166Sgblack@eecs.umich.edu X86_StreamingSIMDExtensions2 | 2924166Sgblack@eecs.umich.edu// X86_CPUSelfSnoop | 2934166Sgblack@eecs.umich.edu// X86_HyperThreading | 2944166Sgblack@eecs.umich.edu// X86_AutomaticClockControl | 2954166Sgblack@eecs.umich.edu// X86_IA64Processor | 2964166Sgblack@eecs.umich.edu 0; 2974166Sgblack@eecs.umich.edu 2984166Sgblack@eecs.umich.edu //Bits which describe the system hardware capabilities 2994166Sgblack@eecs.umich.edu //XXX Figure out what these should be 3004166Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_HWCAP, features)); 3014166Sgblack@eecs.umich.edu //The system page size 3024166Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_PAGESZ, X86ISA::VMPageSize)); 3034166Sgblack@eecs.umich.edu //Frequency at which times() increments 3044166Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_CLKTCK, 100)); 3054166Sgblack@eecs.umich.edu // For statically linked executables, this is the virtual address of the 3064166Sgblack@eecs.umich.edu // program header tables if they appear in the executable image 3074166Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable())); 3084166Sgblack@eecs.umich.edu // This is the size of a program header entry from the elf file. 3094166Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_PHENT, elfObject->programHeaderSize())); 3104166Sgblack@eecs.umich.edu // This is the number of program headers from the original elf file. 3114166Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_PHNUM, elfObject->programHeaderCount())); 3124166Sgblack@eecs.umich.edu //Defined to be 100 in the kernel source. 3134166Sgblack@eecs.umich.edu //This is the address of the elf "interpreter", It should be set 3144166Sgblack@eecs.umich.edu //to 0 for regular executables. It should be something else 3154166Sgblack@eecs.umich.edu //(not sure what) for dynamic libraries. 3164166Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_BASE, 0)); 3174166Sgblack@eecs.umich.edu 3184166Sgblack@eecs.umich.edu //XXX Figure out what this should be. 3194166Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_FLAGS, 0)); 3204166Sgblack@eecs.umich.edu //The entry point to the program 3214166Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint())); 3224166Sgblack@eecs.umich.edu //Different user and group IDs 3234166Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_UID, uid())); 3244166Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_EUID, euid())); 3254166Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_GID, gid())); 3264166Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_EGID, egid())); 3274166Sgblack@eecs.umich.edu //Whether to enable "secure mode" in the executable 3284166Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_SECURE, 0)); 3294166Sgblack@eecs.umich.edu //The string "x86_64" with unknown meaning 3304166Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_PLATFORM, 0)); 3314166Sgblack@eecs.umich.edu } 3324166Sgblack@eecs.umich.edu 3334166Sgblack@eecs.umich.edu //Figure out how big the initial stack needs to be 3344166Sgblack@eecs.umich.edu 3354166Sgblack@eecs.umich.edu // A sentry NULL void pointer at the top of the stack. 3364166Sgblack@eecs.umich.edu int sentry_size = intSize; 3374166Sgblack@eecs.umich.edu 3384166Sgblack@eecs.umich.edu //This is the name of the file which is present on the initial stack 3394166Sgblack@eecs.umich.edu //It's purpose is to let the user space linker examine the original file. 3404166Sgblack@eecs.umich.edu int file_name_size = filename.size() + 1; 3414166Sgblack@eecs.umich.edu 3424166Sgblack@eecs.umich.edu string platform = "x86_64"; 3434166Sgblack@eecs.umich.edu int aux_data_size = platform.size() + 1; 3444166Sgblack@eecs.umich.edu 3454166Sgblack@eecs.umich.edu int env_data_size = 0; 3464166Sgblack@eecs.umich.edu for (int i = 0; i < envp.size(); ++i) { 3474166Sgblack@eecs.umich.edu env_data_size += envp[i].size() + 1; 3484166Sgblack@eecs.umich.edu } 3494166Sgblack@eecs.umich.edu int arg_data_size = 0; 3504166Sgblack@eecs.umich.edu for (int i = 0; i < argv.size(); ++i) { 3514166Sgblack@eecs.umich.edu arg_data_size += argv[i].size() + 1; 3524166Sgblack@eecs.umich.edu } 3534166Sgblack@eecs.umich.edu 3544166Sgblack@eecs.umich.edu //The info_block needs to be padded so it's size is a multiple of the 3554166Sgblack@eecs.umich.edu //alignment mask. Also, it appears that there needs to be at least some 3564166Sgblack@eecs.umich.edu //padding, so if the size is already a multiple, we need to increase it 3574166Sgblack@eecs.umich.edu //anyway. 3584166Sgblack@eecs.umich.edu int base_info_block_size = 3594166Sgblack@eecs.umich.edu sentry_size + file_name_size + env_data_size + arg_data_size; 3604166Sgblack@eecs.umich.edu 3614166Sgblack@eecs.umich.edu int info_block_size = roundUp(base_info_block_size, align); 362 363 int info_block_padding = info_block_size - base_info_block_size; 364 365 //Each auxilliary vector is two 8 byte words 366 int aux_array_size = intSize * 2 * (auxv.size() + 1); 367 368 int envp_array_size = intSize * (envp.size() + 1); 369 int argv_array_size = intSize * (argv.size() + 1); 370 371 int argc_size = intSize; 372 373 //Figure out the size of the contents of the actual initial frame 374 int frame_size = 375 aux_array_size + 376 envp_array_size + 377 argv_array_size + 378 argc_size; 379 380 //There needs to be padding after the auxiliary vector data so that the 381 //very bottom of the stack is aligned properly. 382 int partial_size = frame_size + aux_data_size; 383 int aligned_partial_size = roundUp(partial_size, align); 384 int aux_padding = aligned_partial_size - partial_size; 385 386 int space_needed = 387 info_block_size + 388 aux_data_size + 389 aux_padding + 390 frame_size; 391 392 stack_min = stack_base - space_needed; 393 stack_min = roundDown(stack_min, align); 394 stack_size = stack_base - stack_min; 395 396 // map memory 397 pTable->allocate(roundDown(stack_min, pageSize), 398 roundUp(stack_size, pageSize)); 399 400 // map out initial stack contents 401 Addr sentry_base = stack_base - sentry_size; 402 Addr file_name_base = sentry_base - file_name_size; 403 Addr env_data_base = file_name_base - env_data_size; 404 Addr arg_data_base = env_data_base - arg_data_size; 405 Addr aux_data_base = arg_data_base - info_block_padding - aux_data_size; 406 Addr auxv_array_base = aux_data_base - aux_array_size - aux_padding; 407 Addr envp_array_base = auxv_array_base - envp_array_size; 408 Addr argv_array_base = envp_array_base - argv_array_size; 409 Addr argc_base = argv_array_base - argc_size; 410 411 DPRINTF(X86, "The addresses of items on the initial stack:\n"); 412 DPRINTF(X86, "0x%x - file name\n", file_name_base); 413 DPRINTF(X86, "0x%x - env data\n", env_data_base); 414 DPRINTF(X86, "0x%x - arg data\n", arg_data_base); 415 DPRINTF(X86, "0x%x - aux data\n", aux_data_base); 416 DPRINTF(X86, "0x%x - auxv array\n", auxv_array_base); 417 DPRINTF(X86, "0x%x - envp array\n", envp_array_base); 418 DPRINTF(X86, "0x%x - argv array\n", argv_array_base); 419 DPRINTF(X86, "0x%x - argc \n", argc_base); 420 DPRINTF(X86, "0x%x - stack min\n", stack_min); 421 422 // write contents to stack 423 424 // figure out argc 425 uint64_t argc = argv.size(); 426 uint64_t guestArgc = TheISA::htog(argc); 427 428 //Write out the sentry void * 429 uint64_t sentry_NULL = 0; 430 initVirtMem->writeBlob(sentry_base, 431 (uint8_t*)&sentry_NULL, sentry_size); 432 433 //Write the file name 434 initVirtMem->writeString(file_name_base, filename.c_str()); 435 436 //Fix up the aux vector which points to the "platform" string 437 assert(auxv[auxv.size() - 1].a_type = M5_AT_PLATFORM); 438 auxv[auxv.size() - 1].a_val = aux_data_base; 439 440 //Copy the aux stuff 441 for(int x = 0; x < auxv.size(); x++) 442 { 443 initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize, 444 (uint8_t*)&(auxv[x].a_type), intSize); 445 initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize, 446 (uint8_t*)&(auxv[x].a_val), intSize); 447 } 448 //Write out the terminating zeroed auxilliary vector 449 const uint64_t zero = 0; 450 initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(), 451 (uint8_t*)&zero, 2 * intSize); 452 453 initVirtMem->writeString(aux_data_base, platform.c_str()); 454 455 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem); 456 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem); 457 458 initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize); 459 460 //Set the stack pointer register 461 threadContexts[0]->setIntReg(StackPointerReg, stack_min); 462 463 Addr prog_entry = objFile->entryPoint(); 464 threadContexts[0]->setPC(prog_entry); 465 threadContexts[0]->setNextPC(prog_entry + sizeof(MachInst)); 466 467 //Align the "stack_min" to a page boundary. 468 stack_min = roundDown(stack_min, pageSize); 469 470// num_processes++; 471} 472