process.cc revision 7640
16019Shines@cs.fsu.edu/* 27414SAli.Saidi@ARM.com * Copyright (c) 2010 ARM Limited 37414SAli.Saidi@ARM.com * All rights reserved 47414SAli.Saidi@ARM.com * 57414SAli.Saidi@ARM.com * The license below extends only to copyright in the software and shall 67414SAli.Saidi@ARM.com * not be construed as granting a license to any other intellectual 77414SAli.Saidi@ARM.com * property including but not limited to intellectual property relating 87414SAli.Saidi@ARM.com * to a hardware implementation of the functionality of the software 97414SAli.Saidi@ARM.com * licensed hereunder. You may use the software subject to the license 107414SAli.Saidi@ARM.com * terms below provided that you ensure that this notice is replicated 117414SAli.Saidi@ARM.com * unmodified and in its entirety in all distributions of the software, 127414SAli.Saidi@ARM.com * modified or unmodified, in source code or in binary form. 137414SAli.Saidi@ARM.com * 146019Shines@cs.fsu.edu * Copyright (c) 2007-2008 The Florida State University 156019Shines@cs.fsu.edu * All rights reserved. 166019Shines@cs.fsu.edu * 176019Shines@cs.fsu.edu * Redistribution and use in source and binary forms, with or without 186019Shines@cs.fsu.edu * modification, are permitted provided that the following conditions are 196019Shines@cs.fsu.edu * met: redistributions of source code must retain the above copyright 206019Shines@cs.fsu.edu * notice, this list of conditions and the following disclaimer; 216019Shines@cs.fsu.edu * redistributions in binary form must reproduce the above copyright 226019Shines@cs.fsu.edu * notice, this list of conditions and the following disclaimer in the 236019Shines@cs.fsu.edu * documentation and/or other materials provided with the distribution; 246019Shines@cs.fsu.edu * neither the name of the copyright holders nor the names of its 256019Shines@cs.fsu.edu * contributors may be used to endorse or promote products derived from 266019Shines@cs.fsu.edu * this software without specific prior written permission. 276019Shines@cs.fsu.edu * 286019Shines@cs.fsu.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 296019Shines@cs.fsu.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 306019Shines@cs.fsu.edu * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 316019Shines@cs.fsu.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 326019Shines@cs.fsu.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 336019Shines@cs.fsu.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 346019Shines@cs.fsu.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 356019Shines@cs.fsu.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 366019Shines@cs.fsu.edu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 376019Shines@cs.fsu.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 386019Shines@cs.fsu.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 396019Shines@cs.fsu.edu * 406019Shines@cs.fsu.edu * Authors: Stephen Hines 417414SAli.Saidi@ARM.com * Ali Saidi 426019Shines@cs.fsu.edu */ 436019Shines@cs.fsu.edu 446019Shines@cs.fsu.edu#include "arch/arm/isa_traits.hh" 456019Shines@cs.fsu.edu#include "arch/arm/process.hh" 466019Shines@cs.fsu.edu#include "arch/arm/types.hh" 476019Shines@cs.fsu.edu#include "base/loader/elf_object.hh" 486019Shines@cs.fsu.edu#include "base/loader/object_file.hh" 496019Shines@cs.fsu.edu#include "base/misc.hh" 506019Shines@cs.fsu.edu#include "cpu/thread_context.hh" 516019Shines@cs.fsu.edu#include "mem/page_table.hh" 526019Shines@cs.fsu.edu#include "mem/translating_port.hh" 536019Shines@cs.fsu.edu#include "sim/process_impl.hh" 546019Shines@cs.fsu.edu#include "sim/system.hh" 556019Shines@cs.fsu.edu 566019Shines@cs.fsu.eduusing namespace std; 576019Shines@cs.fsu.eduusing namespace ArmISA; 586019Shines@cs.fsu.edu 597096Sgblack@eecs.umich.eduArmLiveProcess::ArmLiveProcess(LiveProcessParams *params, ObjectFile *objFile, 607096Sgblack@eecs.umich.edu ObjectFile::Arch _arch) 617096Sgblack@eecs.umich.edu : LiveProcess(params, objFile), arch(_arch) 626019Shines@cs.fsu.edu{ 636400Sgblack@eecs.umich.edu stack_base = 0xbf000000L; 646019Shines@cs.fsu.edu 656019Shines@cs.fsu.edu // Set pointer for next thread stack. Reserve 8M for main stack. 666019Shines@cs.fsu.edu next_thread_stack_base = stack_base - (8 * 1024 * 1024); 676019Shines@cs.fsu.edu 686019Shines@cs.fsu.edu // Set up break point (Top of Heap) 696019Shines@cs.fsu.edu brk_point = objFile->dataBase() + objFile->dataSize() + objFile->bssSize(); 706019Shines@cs.fsu.edu brk_point = roundUp(brk_point, VMPageSize); 716019Shines@cs.fsu.edu 726019Shines@cs.fsu.edu // Set up region for mmaps. For now, start at bottom of kuseg space. 737172Sgblack@eecs.umich.edu mmap_start = mmap_end = 0x40000000L; 746019Shines@cs.fsu.edu} 756019Shines@cs.fsu.edu 766019Shines@cs.fsu.eduvoid 776019Shines@cs.fsu.eduArmLiveProcess::startup() 786019Shines@cs.fsu.edu{ 797532Ssteve.reinhardt@amd.com LiveProcess::startup(); 806019Shines@cs.fsu.edu argsInit(MachineBytes, VMPageSize); 817640Sgblack@eecs.umich.edu for (int i = 0; i < contextIds.size(); i++) { 827640Sgblack@eecs.umich.edu ThreadContext * tc = system->getThreadContext(contextIds[i]); 837640Sgblack@eecs.umich.edu CPACR cpacr = tc->readMiscReg(MISCREG_CPACR); 847640Sgblack@eecs.umich.edu // Enable the floating point coprocessors. 857640Sgblack@eecs.umich.edu cpacr.cp10 = 0x3; 867640Sgblack@eecs.umich.edu cpacr.cp11 = 0x3; 877640Sgblack@eecs.umich.edu tc->setMiscReg(MISCREG_CPACR, cpacr); 887640Sgblack@eecs.umich.edu // Generically enable floating point support. 897640Sgblack@eecs.umich.edu FPEXC fpexc = tc->readMiscReg(MISCREG_FPEXC); 907640Sgblack@eecs.umich.edu fpexc.en = 1; 917640Sgblack@eecs.umich.edu tc->setMiscReg(MISCREG_FPEXC, fpexc); 927640Sgblack@eecs.umich.edu } 936019Shines@cs.fsu.edu} 946019Shines@cs.fsu.edu 956019Shines@cs.fsu.eduvoid 966019Shines@cs.fsu.eduArmLiveProcess::copyStringArray32(std::vector<std::string> &strings, 976019Shines@cs.fsu.edu Addr array_ptr, Addr data_ptr, 986019Shines@cs.fsu.edu TranslatingPort* memPort) 996019Shines@cs.fsu.edu{ 1006019Shines@cs.fsu.edu Addr data_ptr_swap; 1016019Shines@cs.fsu.edu for (int i = 0; i < strings.size(); ++i) { 1026019Shines@cs.fsu.edu data_ptr_swap = htog(data_ptr); 1036019Shines@cs.fsu.edu memPort->writeBlob(array_ptr, (uint8_t*)&data_ptr_swap, 1046019Shines@cs.fsu.edu sizeof(uint32_t)); 1056019Shines@cs.fsu.edu memPort->writeString(data_ptr, strings[i].c_str()); 1066019Shines@cs.fsu.edu array_ptr += sizeof(uint32_t); 1076019Shines@cs.fsu.edu data_ptr += strings[i].size() + 1; 1086019Shines@cs.fsu.edu } 1096019Shines@cs.fsu.edu // add NULL terminator 1106019Shines@cs.fsu.edu data_ptr = 0; 1116019Shines@cs.fsu.edu 1126019Shines@cs.fsu.edu memPort->writeBlob(array_ptr, (uint8_t*)&data_ptr, sizeof(uint32_t)); 1136019Shines@cs.fsu.edu} 1146019Shines@cs.fsu.edu 1156019Shines@cs.fsu.eduvoid 1166019Shines@cs.fsu.eduArmLiveProcess::argsInit(int intSize, int pageSize) 1176019Shines@cs.fsu.edu{ 1186400Sgblack@eecs.umich.edu typedef AuxVector<uint32_t> auxv_t; 1196400Sgblack@eecs.umich.edu std::vector<auxv_t> auxv; 1206400Sgblack@eecs.umich.edu 1216400Sgblack@eecs.umich.edu string filename; 1226400Sgblack@eecs.umich.edu if (argv.size() < 1) 1236400Sgblack@eecs.umich.edu filename = ""; 1246400Sgblack@eecs.umich.edu else 1256400Sgblack@eecs.umich.edu filename = argv[0]; 1266400Sgblack@eecs.umich.edu 1276400Sgblack@eecs.umich.edu //We want 16 byte alignment 1286400Sgblack@eecs.umich.edu uint64_t align = 16; 1296400Sgblack@eecs.umich.edu 1306019Shines@cs.fsu.edu // load object file into target memory 1316019Shines@cs.fsu.edu objFile->loadSections(initVirtMem); 1326019Shines@cs.fsu.edu 1336400Sgblack@eecs.umich.edu enum ArmCpuFeature { 1346400Sgblack@eecs.umich.edu Arm_Swp = 1 << 0, 1356400Sgblack@eecs.umich.edu Arm_Half = 1 << 1, 1366400Sgblack@eecs.umich.edu Arm_Thumb = 1 << 2, 1376400Sgblack@eecs.umich.edu Arm_26Bit = 1 << 3, 1386400Sgblack@eecs.umich.edu Arm_FastMult = 1 << 4, 1396400Sgblack@eecs.umich.edu Arm_Fpa = 1 << 5, 1406400Sgblack@eecs.umich.edu Arm_Vfp = 1 << 6, 1416400Sgblack@eecs.umich.edu Arm_Edsp = 1 << 7, 1426400Sgblack@eecs.umich.edu Arm_Java = 1 << 8, 1436400Sgblack@eecs.umich.edu Arm_Iwmmxt = 1 << 9, 1447414SAli.Saidi@ARM.com Arm_Crunch = 1 << 10, 1457414SAli.Saidi@ARM.com Arm_ThumbEE = 1 << 11, 1467414SAli.Saidi@ARM.com Arm_Neon = 1 << 12, 1477414SAli.Saidi@ARM.com Arm_Vfpv3 = 1 << 13, 1487414SAli.Saidi@ARM.com Arm_Vfpv3d16 = 1 << 14 1496400Sgblack@eecs.umich.edu }; 1506400Sgblack@eecs.umich.edu 1516400Sgblack@eecs.umich.edu //Setup the auxilliary vectors. These will already have endian conversion. 1526400Sgblack@eecs.umich.edu //Auxilliary vectors are loaded only for elf formatted executables. 1536400Sgblack@eecs.umich.edu ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile); 1546400Sgblack@eecs.umich.edu if (elfObject) { 1556400Sgblack@eecs.umich.edu uint32_t features = 1566400Sgblack@eecs.umich.edu Arm_Swp | 1576400Sgblack@eecs.umich.edu Arm_Half | 1586400Sgblack@eecs.umich.edu Arm_Thumb | 1596400Sgblack@eecs.umich.edu// Arm_26Bit | 1606400Sgblack@eecs.umich.edu Arm_FastMult | 1616400Sgblack@eecs.umich.edu// Arm_Fpa | 1626400Sgblack@eecs.umich.edu Arm_Vfp | 1636400Sgblack@eecs.umich.edu Arm_Edsp | 1647414SAli.Saidi@ARM.com// Arm_Java | 1656400Sgblack@eecs.umich.edu// Arm_Iwmmxt | 1666400Sgblack@eecs.umich.edu// Arm_Crunch | 1677414SAli.Saidi@ARM.com Arm_ThumbEE | 1687414SAli.Saidi@ARM.com Arm_Neon | 1697414SAli.Saidi@ARM.com Arm_Vfpv3 | 1707414SAli.Saidi@ARM.com Arm_Vfpv3d16 | 1716400Sgblack@eecs.umich.edu 0; 1726400Sgblack@eecs.umich.edu 1736400Sgblack@eecs.umich.edu //Bits which describe the system hardware capabilities 1746400Sgblack@eecs.umich.edu //XXX Figure out what these should be 1756400Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_HWCAP, features)); 1766400Sgblack@eecs.umich.edu //The system page size 1776400Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_PAGESZ, ArmISA::VMPageSize)); 1786400Sgblack@eecs.umich.edu //Frequency at which times() increments 1796400Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_CLKTCK, 0x64)); 1806400Sgblack@eecs.umich.edu // For statically linked executables, this is the virtual address of the 1816400Sgblack@eecs.umich.edu // program header tables if they appear in the executable image 1826400Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable())); 1836400Sgblack@eecs.umich.edu // This is the size of a program header entry from the elf file. 1846400Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_PHENT, elfObject->programHeaderSize())); 1856400Sgblack@eecs.umich.edu // This is the number of program headers from the original elf file. 1866400Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_PHNUM, elfObject->programHeaderCount())); 1876400Sgblack@eecs.umich.edu //This is the address of the elf "interpreter", It should be set 1886400Sgblack@eecs.umich.edu //to 0 for regular executables. It should be something else 1896400Sgblack@eecs.umich.edu //(not sure what) for dynamic libraries. 1906400Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_BASE, 0)); 1916400Sgblack@eecs.umich.edu 1926400Sgblack@eecs.umich.edu //XXX Figure out what this should be. 1936400Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_FLAGS, 0)); 1946400Sgblack@eecs.umich.edu //The entry point to the program 1956400Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint())); 1966400Sgblack@eecs.umich.edu //Different user and group IDs 1976400Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_UID, uid())); 1986400Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_EUID, euid())); 1996400Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_GID, gid())); 2006400Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_EGID, egid())); 2016400Sgblack@eecs.umich.edu //Whether to enable "secure mode" in the executable 2026400Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_SECURE, 0)); 2037414SAli.Saidi@ARM.com 2047414SAli.Saidi@ARM.com // Pointer to 16 bytes of random data 2057414SAli.Saidi@ARM.com auxv.push_back(auxv_t(M5_AT_RANDOM, 0)); 2067414SAli.Saidi@ARM.com 2076400Sgblack@eecs.umich.edu //The filename of the program 2086400Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_EXECFN, 0)); 2097414SAli.Saidi@ARM.com //The string "v71" -- ARM v7 architecture 2106400Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_PLATFORM, 0)); 2116400Sgblack@eecs.umich.edu } 2126400Sgblack@eecs.umich.edu 2136400Sgblack@eecs.umich.edu //Figure out how big the initial stack nedes to be 2146400Sgblack@eecs.umich.edu 2156400Sgblack@eecs.umich.edu // A sentry NULL void pointer at the top of the stack. 2166400Sgblack@eecs.umich.edu int sentry_size = intSize; 2176400Sgblack@eecs.umich.edu 2187414SAli.Saidi@ARM.com string platform = "v71"; 2196400Sgblack@eecs.umich.edu int platform_size = platform.size() + 1; 2206400Sgblack@eecs.umich.edu 2217414SAli.Saidi@ARM.com // Bytes for AT_RANDOM above, we'll just keep them 0 2227414SAli.Saidi@ARM.com int aux_random_size = 16; // as per the specification 2237414SAli.Saidi@ARM.com 2246400Sgblack@eecs.umich.edu // The aux vectors are put on the stack in two groups. The first group are 2256400Sgblack@eecs.umich.edu // the vectors that are generated as the elf is loaded. The second group 2266400Sgblack@eecs.umich.edu // are the ones that were computed ahead of time and include the platform 2276400Sgblack@eecs.umich.edu // string. 2286400Sgblack@eecs.umich.edu int aux_data_size = filename.size() + 1; 2296400Sgblack@eecs.umich.edu 2306400Sgblack@eecs.umich.edu int env_data_size = 0; 2316400Sgblack@eecs.umich.edu for (int i = 0; i < envp.size(); ++i) { 2326400Sgblack@eecs.umich.edu env_data_size += envp[i].size() + 1; 2336400Sgblack@eecs.umich.edu } 2346019Shines@cs.fsu.edu int arg_data_size = 0; 2356019Shines@cs.fsu.edu for (int i = 0; i < argv.size(); ++i) { 2366019Shines@cs.fsu.edu arg_data_size += argv[i].size() + 1; 2376019Shines@cs.fsu.edu } 2386400Sgblack@eecs.umich.edu 2396400Sgblack@eecs.umich.edu int info_block_size = 2406400Sgblack@eecs.umich.edu sentry_size + env_data_size + arg_data_size + 2417414SAli.Saidi@ARM.com aux_data_size + platform_size + aux_random_size; 2426400Sgblack@eecs.umich.edu 2436400Sgblack@eecs.umich.edu //Each auxilliary vector is two 4 byte words 2446400Sgblack@eecs.umich.edu int aux_array_size = intSize * 2 * (auxv.size() + 1); 2456400Sgblack@eecs.umich.edu 2466400Sgblack@eecs.umich.edu int envp_array_size = intSize * (envp.size() + 1); 2476400Sgblack@eecs.umich.edu int argv_array_size = intSize * (argv.size() + 1); 2486400Sgblack@eecs.umich.edu 2496400Sgblack@eecs.umich.edu int argc_size = intSize; 2506400Sgblack@eecs.umich.edu 2516400Sgblack@eecs.umich.edu //Figure out the size of the contents of the actual initial frame 2526400Sgblack@eecs.umich.edu int frame_size = 2536400Sgblack@eecs.umich.edu info_block_size + 2546400Sgblack@eecs.umich.edu aux_array_size + 2556400Sgblack@eecs.umich.edu envp_array_size + 2566400Sgblack@eecs.umich.edu argv_array_size + 2576400Sgblack@eecs.umich.edu argc_size; 2586400Sgblack@eecs.umich.edu 2596400Sgblack@eecs.umich.edu //There needs to be padding after the auxiliary vector data so that the 2606400Sgblack@eecs.umich.edu //very bottom of the stack is aligned properly. 2616400Sgblack@eecs.umich.edu int partial_size = frame_size; 2626400Sgblack@eecs.umich.edu int aligned_partial_size = roundUp(partial_size, align); 2636400Sgblack@eecs.umich.edu int aux_padding = aligned_partial_size - partial_size; 2646400Sgblack@eecs.umich.edu 2656400Sgblack@eecs.umich.edu int space_needed = frame_size + aux_padding; 2666400Sgblack@eecs.umich.edu 2676400Sgblack@eecs.umich.edu stack_min = stack_base - space_needed; 2686400Sgblack@eecs.umich.edu stack_min = roundDown(stack_min, align); 2696400Sgblack@eecs.umich.edu stack_size = stack_base - stack_min; 2706400Sgblack@eecs.umich.edu 2716400Sgblack@eecs.umich.edu // map memory 2726400Sgblack@eecs.umich.edu pTable->allocate(roundDown(stack_min, pageSize), 2736400Sgblack@eecs.umich.edu roundUp(stack_size, pageSize)); 2746400Sgblack@eecs.umich.edu 2756400Sgblack@eecs.umich.edu // map out initial stack contents 2766400Sgblack@eecs.umich.edu uint32_t sentry_base = stack_base - sentry_size; 2776400Sgblack@eecs.umich.edu uint32_t aux_data_base = sentry_base - aux_data_size; 2786400Sgblack@eecs.umich.edu uint32_t env_data_base = aux_data_base - env_data_size; 2796400Sgblack@eecs.umich.edu uint32_t arg_data_base = env_data_base - arg_data_size; 2806400Sgblack@eecs.umich.edu uint32_t platform_base = arg_data_base - platform_size; 2817414SAli.Saidi@ARM.com uint32_t aux_random_base = platform_base - aux_random_size; 2827414SAli.Saidi@ARM.com uint32_t auxv_array_base = aux_random_base - aux_array_size - aux_padding; 2836400Sgblack@eecs.umich.edu uint32_t envp_array_base = auxv_array_base - envp_array_size; 2846400Sgblack@eecs.umich.edu uint32_t argv_array_base = envp_array_base - argv_array_size; 2856400Sgblack@eecs.umich.edu uint32_t argc_base = argv_array_base - argc_size; 2866400Sgblack@eecs.umich.edu 2876400Sgblack@eecs.umich.edu DPRINTF(Stack, "The addresses of items on the initial stack:\n"); 2886400Sgblack@eecs.umich.edu DPRINTF(Stack, "0x%x - aux data\n", aux_data_base); 2896400Sgblack@eecs.umich.edu DPRINTF(Stack, "0x%x - env data\n", env_data_base); 2906400Sgblack@eecs.umich.edu DPRINTF(Stack, "0x%x - arg data\n", arg_data_base); 2917414SAli.Saidi@ARM.com DPRINTF(Stack, "0x%x - random data\n", aux_random_base); 2926400Sgblack@eecs.umich.edu DPRINTF(Stack, "0x%x - platform base\n", platform_base); 2936400Sgblack@eecs.umich.edu DPRINTF(Stack, "0x%x - auxv array\n", auxv_array_base); 2946400Sgblack@eecs.umich.edu DPRINTF(Stack, "0x%x - envp array\n", envp_array_base); 2956400Sgblack@eecs.umich.edu DPRINTF(Stack, "0x%x - argv array\n", argv_array_base); 2966400Sgblack@eecs.umich.edu DPRINTF(Stack, "0x%x - argc \n", argc_base); 2976400Sgblack@eecs.umich.edu DPRINTF(Stack, "0x%x - stack min\n", stack_min); 2986400Sgblack@eecs.umich.edu 2996400Sgblack@eecs.umich.edu // write contents to stack 3006400Sgblack@eecs.umich.edu 3016400Sgblack@eecs.umich.edu // figure out argc 3026400Sgblack@eecs.umich.edu uint32_t argc = argv.size(); 3036400Sgblack@eecs.umich.edu uint32_t guestArgc = ArmISA::htog(argc); 3046400Sgblack@eecs.umich.edu 3056400Sgblack@eecs.umich.edu //Write out the sentry void * 3066400Sgblack@eecs.umich.edu uint32_t sentry_NULL = 0; 3076400Sgblack@eecs.umich.edu initVirtMem->writeBlob(sentry_base, 3086400Sgblack@eecs.umich.edu (uint8_t*)&sentry_NULL, sentry_size); 3096400Sgblack@eecs.umich.edu 3106400Sgblack@eecs.umich.edu //Fix up the aux vectors which point to other data 3116400Sgblack@eecs.umich.edu for (int i = auxv.size() - 1; i >= 0; i--) { 3126400Sgblack@eecs.umich.edu if (auxv[i].a_type == M5_AT_PLATFORM) { 3136400Sgblack@eecs.umich.edu auxv[i].a_val = platform_base; 3146400Sgblack@eecs.umich.edu initVirtMem->writeString(platform_base, platform.c_str()); 3156400Sgblack@eecs.umich.edu } else if (auxv[i].a_type == M5_AT_EXECFN) { 3166400Sgblack@eecs.umich.edu auxv[i].a_val = aux_data_base; 3176400Sgblack@eecs.umich.edu initVirtMem->writeString(aux_data_base, filename.c_str()); 3187414SAli.Saidi@ARM.com } else if (auxv[i].a_type == M5_AT_RANDOM) { 3197414SAli.Saidi@ARM.com auxv[i].a_val = aux_random_base; 3207414SAli.Saidi@ARM.com // Just leave the value 0, we don't want randomness 3216400Sgblack@eecs.umich.edu } 3226019Shines@cs.fsu.edu } 3236019Shines@cs.fsu.edu 3246400Sgblack@eecs.umich.edu //Copy the aux stuff 3256400Sgblack@eecs.umich.edu for(int x = 0; x < auxv.size(); x++) 3266400Sgblack@eecs.umich.edu { 3276400Sgblack@eecs.umich.edu initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize, 3286400Sgblack@eecs.umich.edu (uint8_t*)&(auxv[x].a_type), intSize); 3296400Sgblack@eecs.umich.edu initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize, 3306400Sgblack@eecs.umich.edu (uint8_t*)&(auxv[x].a_val), intSize); 3316400Sgblack@eecs.umich.edu } 3326400Sgblack@eecs.umich.edu //Write out the terminating zeroed auxilliary vector 3336400Sgblack@eecs.umich.edu const uint64_t zero = 0; 3346400Sgblack@eecs.umich.edu initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(), 3356400Sgblack@eecs.umich.edu (uint8_t*)&zero, 2 * intSize); 3366019Shines@cs.fsu.edu 3376400Sgblack@eecs.umich.edu copyStringArray(envp, envp_array_base, env_data_base, initVirtMem); 3386400Sgblack@eecs.umich.edu copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem); 3396019Shines@cs.fsu.edu 3406400Sgblack@eecs.umich.edu initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize); 3416019Shines@cs.fsu.edu 3426020Sgblack@eecs.umich.edu ThreadContext *tc = system->getThreadContext(contextIds[0]); 3436400Sgblack@eecs.umich.edu //Set the stack pointer register 3446020Sgblack@eecs.umich.edu tc->setIntReg(StackPointerReg, stack_min); 3456400Sgblack@eecs.umich.edu //A pointer to a function to run when the program exits. We'll set this 3466400Sgblack@eecs.umich.edu //to zero explicitly to make sure this isn't used. 3476400Sgblack@eecs.umich.edu tc->setIntReg(ArgumentReg0, 0); 3486400Sgblack@eecs.umich.edu //Set argument regs 1 and 2 to argv[0] and envp[0] respectively 3496400Sgblack@eecs.umich.edu if (argv.size() > 0) { 3506400Sgblack@eecs.umich.edu tc->setIntReg(ArgumentReg1, arg_data_base + arg_data_size - 3516400Sgblack@eecs.umich.edu argv[argv.size() - 1].size() - 1); 3526400Sgblack@eecs.umich.edu } else { 3536400Sgblack@eecs.umich.edu tc->setIntReg(ArgumentReg1, 0); 3546400Sgblack@eecs.umich.edu } 3556400Sgblack@eecs.umich.edu if (envp.size() > 0) { 3566400Sgblack@eecs.umich.edu tc->setIntReg(ArgumentReg2, env_data_base + env_data_size - 3576400Sgblack@eecs.umich.edu envp[envp.size() - 1].size() - 1); 3586400Sgblack@eecs.umich.edu } else { 3596400Sgblack@eecs.umich.edu tc->setIntReg(ArgumentReg2, 0); 3606400Sgblack@eecs.umich.edu } 3616019Shines@cs.fsu.edu 3626019Shines@cs.fsu.edu Addr prog_entry = objFile->entryPoint(); 3637096Sgblack@eecs.umich.edu if (arch == ObjectFile::Thumb) 3647096Sgblack@eecs.umich.edu prog_entry = (prog_entry & ~mask(1)) | (ULL(1) << PcTBitShift); 3656020Sgblack@eecs.umich.edu tc->setPC(prog_entry); 3666020Sgblack@eecs.umich.edu tc->setNextPC(prog_entry + sizeof(MachInst)); 3676400Sgblack@eecs.umich.edu 3686400Sgblack@eecs.umich.edu //Align the "stack_min" to a page boundary. 3696400Sgblack@eecs.umich.edu stack_min = roundDown(stack_min, pageSize); 3706019Shines@cs.fsu.edu} 3716019Shines@cs.fsu.edu 3726020Sgblack@eecs.umich.eduArmISA::IntReg 3736701Sgblack@eecs.umich.eduArmLiveProcess::getSyscallArg(ThreadContext *tc, int &i) 3746020Sgblack@eecs.umich.edu{ 3757441SAli.Saidi@ARM.com assert(i < 6); 3766701Sgblack@eecs.umich.edu return tc->readIntReg(ArgumentReg0 + i++); 3776020Sgblack@eecs.umich.edu} 3786020Sgblack@eecs.umich.edu 3797441SAli.Saidi@ARM.comuint64_t 3807441SAli.Saidi@ARM.comArmLiveProcess::getSyscallArg(ThreadContext *tc, int &i, int width) 3817441SAli.Saidi@ARM.com{ 3827441SAli.Saidi@ARM.com assert(width == 32 || width == 64); 3837441SAli.Saidi@ARM.com if (width == 32) 3847441SAli.Saidi@ARM.com return getSyscallArg(tc, i); 3857441SAli.Saidi@ARM.com 3867441SAli.Saidi@ARM.com // 64 bit arguments are passed starting in an even register 3877441SAli.Saidi@ARM.com if (i % 2 != 0) 3887441SAli.Saidi@ARM.com i++; 3897441SAli.Saidi@ARM.com 3907441SAli.Saidi@ARM.com // Registers r0-r6 can be used 3917441SAli.Saidi@ARM.com assert(i < 5); 3927441SAli.Saidi@ARM.com uint64_t val; 3937441SAli.Saidi@ARM.com val = tc->readIntReg(ArgumentReg0 + i++); 3947441SAli.Saidi@ARM.com val |= ((uint64_t)tc->readIntReg(ArgumentReg0 + i++) << 32); 3957441SAli.Saidi@ARM.com return val; 3967441SAli.Saidi@ARM.com} 3977441SAli.Saidi@ARM.com 3987441SAli.Saidi@ARM.com 3996020Sgblack@eecs.umich.eduvoid 4006020Sgblack@eecs.umich.eduArmLiveProcess::setSyscallArg(ThreadContext *tc, 4016020Sgblack@eecs.umich.edu int i, ArmISA::IntReg val) 4026020Sgblack@eecs.umich.edu{ 4036020Sgblack@eecs.umich.edu assert(i < 4); 4046020Sgblack@eecs.umich.edu tc->setIntReg(ArgumentReg0 + i, val); 4056020Sgblack@eecs.umich.edu} 4066020Sgblack@eecs.umich.edu 4076020Sgblack@eecs.umich.eduvoid 4086020Sgblack@eecs.umich.eduArmLiveProcess::setSyscallReturn(ThreadContext *tc, 4096020Sgblack@eecs.umich.edu SyscallReturn return_value) 4106020Sgblack@eecs.umich.edu{ 4116020Sgblack@eecs.umich.edu tc->setIntReg(ReturnValueReg, return_value.value()); 4126020Sgblack@eecs.umich.edu} 413