process.cc revision 2976:371224501196
1/* 2 * Copyright (c) 2003-2004 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Gabe Black 29 * Ali Saidi 30 */ 31 32#include "arch/sparc/isa_traits.hh" 33#include "arch/sparc/process.hh" 34#include "base/loader/object_file.hh" 35#include "base/loader/elf_object.hh" 36#include "base/misc.hh" 37#include "cpu/thread_context.hh" 38#include "mem/page_table.hh" 39#include "mem/translating_port.hh" 40#include "sim/system.hh" 41 42using namespace std; 43using namespace SparcISA; 44 45 46SparcLiveProcess::SparcLiveProcess(const std::string &nm, ObjectFile *objFile, 47 System *_system, int stdin_fd, int stdout_fd, int stderr_fd, 48 std::vector<std::string> &argv, std::vector<std::string> &envp) 49 : LiveProcess(nm, objFile, _system, stdin_fd, stdout_fd, stderr_fd, 50 argv, envp) 51{ 52 53 // XXX all the below need to be updated for SPARC - Ali 54 brk_point = objFile->dataBase() + objFile->dataSize() + objFile->bssSize(); 55 brk_point = roundUp(brk_point, VMPageSize); 56 57 // Set up stack. On SPARC Linux, stack goes from the top of memory 58 // downward, less the hole for the kernel address space. 59 stack_base = ((Addr)0x80000000000ULL); 60 61 // Set up region for mmaps. Tru64 seems to start just above 0 and 62 // grow up from there. 63 mmap_start = mmap_end = 0x800000; 64 65 // Set pointer for next thread stack. Reserve 8M for main stack. 66 next_thread_stack_base = stack_base - (8 * 1024 * 1024); 67} 68 69void 70SparcLiveProcess::startup() 71{ 72 argsInit(MachineBytes, VMPageSize); 73 74 //From the SPARC ABI 75 76 //The process runs in user mode 77 threadContexts[0]->setMiscRegWithEffect(MISCREG_PSTATE, 0x02); 78 79 //Setup default FP state 80 threadContexts[0]->setMiscReg(MISCREG_FSR, 0); 81 82 threadContexts[0]->setMiscReg(MISCREG_TICK, 0); 83 // 84 /* 85 * Register window management registers 86 */ 87 88 //No windows contain info from other programs 89 threadContexts[0]->setMiscRegWithEffect(MISCREG_OTHERWIN, 0); 90 //There are no windows to pop 91 threadContexts[0]->setMiscRegWithEffect(MISCREG_CANRESTORE, 0); 92 //All windows are available to save into 93 threadContexts[0]->setMiscRegWithEffect(MISCREG_CANSAVE, NWindows - 2); 94 //All windows are "clean" 95 threadContexts[0]->setMiscRegWithEffect(MISCREG_CLEANWIN, NWindows); 96 //Start with register window 0 97 threadContexts[0]->setMiscRegWithEffect(MISCREG_CWP, 0); 98} 99 100m5_auxv_t buildAuxVect(int64_t type, int64_t val) 101{ 102 m5_auxv_t result; 103 result.a_type = TheISA::htog(type); 104 result.a_val = TheISA::htog(val); 105 return result; 106} 107 108void 109SparcLiveProcess::argsInit(int intSize, int pageSize) 110{ 111 Process::startup(); 112 113 Addr alignmentMask = ~(intSize - 1); 114 115 // load object file into target memory 116 objFile->loadSections(initVirtMem); 117 118 //These are the auxilliary vector types 119 enum auxTypes 120 { 121 SPARC_AT_HWCAP = 16, 122 SPARC_AT_PAGESZ = 6, 123 SPARC_AT_CLKTCK = 17, 124 SPARC_AT_PHDR = 3, 125 SPARC_AT_PHENT = 4, 126 SPARC_AT_PHNUM = 5, 127 SPARC_AT_BASE = 7, 128 SPARC_AT_FLAGS = 8, 129 SPARC_AT_ENTRY = 9, 130 SPARC_AT_UID = 11, 131 SPARC_AT_EUID = 12, 132 SPARC_AT_GID = 13, 133 SPARC_AT_EGID = 14, 134 SPARC_AT_SECURE = 23 135 }; 136 137 enum hardwareCaps 138 { 139 M5_HWCAP_SPARC_FLUSH = 1, 140 M5_HWCAP_SPARC_STBAR = 2, 141 M5_HWCAP_SPARC_SWAP = 4, 142 M5_HWCAP_SPARC_MULDIV = 8, 143 M5_HWCAP_SPARC_V9 = 16, 144 //This one should technically only be set 145 //if there is a cheetah or cheetah_plus tlb, 146 //but we'll use it all the time 147 M5_HWCAP_SPARC_ULTRA3 = 32 148 }; 149 150 const int64_t hwcap = 151 M5_HWCAP_SPARC_FLUSH | 152 M5_HWCAP_SPARC_STBAR | 153 M5_HWCAP_SPARC_SWAP | 154 M5_HWCAP_SPARC_MULDIV | 155 M5_HWCAP_SPARC_V9 | 156 M5_HWCAP_SPARC_ULTRA3; 157 158 159 //Setup the auxilliary vectors. These will already have endian conversion. 160 //Auxilliary vectors are loaded only for elf formatted executables. 161 ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile); 162 if(elfObject) 163 { 164 //Bits which describe the system hardware capabilities 165 auxv.push_back(buildAuxVect(SPARC_AT_HWCAP, hwcap)); 166 //The system page size 167 auxv.push_back(buildAuxVect(SPARC_AT_PAGESZ, SparcISA::VMPageSize)); 168 //Defined to be 100 in the kernel source. 169 //Frequency at which times() increments 170 auxv.push_back(buildAuxVect(SPARC_AT_CLKTCK, 100)); 171 // For statically linked executables, this is the virtual address of the 172 // program header tables if they appear in the executable image 173 auxv.push_back(buildAuxVect(SPARC_AT_PHDR, elfObject->programHeaderTable())); 174 // This is the size of a program header entry from the elf file. 175 auxv.push_back(buildAuxVect(SPARC_AT_PHENT, elfObject->programHeaderSize())); 176 // This is the number of program headers from the original elf file. 177 auxv.push_back(buildAuxVect(SPARC_AT_PHNUM, elfObject->programHeaderCount())); 178 //This is the address of the elf "interpreter", It should be set 179 //to 0 for regular executables. It should be something else 180 //(not sure what) for dynamic libraries. 181 auxv.push_back(buildAuxVect(SPARC_AT_BASE, 0)); 182 //This is hardwired to 0 in the elf loading code in the kernel 183 auxv.push_back(buildAuxVect(SPARC_AT_FLAGS, 0)); 184 //The entry point to the program 185 auxv.push_back(buildAuxVect(SPARC_AT_ENTRY, objFile->entryPoint())); 186 //Different user and group IDs 187 auxv.push_back(buildAuxVect(SPARC_AT_UID, 100)); 188 auxv.push_back(buildAuxVect(SPARC_AT_EUID, 100)); 189 auxv.push_back(buildAuxVect(SPARC_AT_GID, 100)); 190 auxv.push_back(buildAuxVect(SPARC_AT_EGID, 100)); 191 //Whether to enable "secure mode" in the executable 192 auxv.push_back(buildAuxVect(SPARC_AT_SECURE, 0)); 193 } 194 195 //Figure out how big the initial stack needs to be 196 197 //Each auxilliary vector is two 8 byte words 198 int aux_data_size = 2 * intSize * auxv.size(); 199 int env_data_size = 0; 200 for (int i = 0; i < envp.size(); ++i) { 201 env_data_size += envp[i].size() + 1; 202 } 203 int arg_data_size = 0; 204 for (int i = 0; i < argv.size(); ++i) { 205 arg_data_size += argv[i].size() + 1; 206 } 207 208 int aux_array_size = intSize * 2 * (auxv.size() + 1); 209 210 int argv_array_size = intSize * (argv.size() + 1); 211 int envp_array_size = intSize * (envp.size() + 1); 212 213 int argc_size = intSize; 214 int window_save_size = intSize * 16; 215 216 int info_block_size = 217 (aux_data_size + 218 env_data_size + 219 arg_data_size + 220 ~alignmentMask) & alignmentMask; 221 222 int info_block_padding = 223 info_block_size - 224 aux_data_size - 225 env_data_size - 226 arg_data_size; 227 228 int space_needed = 229 info_block_size + 230 aux_array_size + 231 envp_array_size + 232 argv_array_size + 233 argc_size + 234 window_save_size; 235 236 stack_min = stack_base - space_needed; 237 stack_min &= alignmentMask; 238 stack_size = stack_base - stack_min; 239 240 // map memory 241 pTable->allocate(roundDown(stack_min, pageSize), 242 roundUp(stack_size, pageSize)); 243 244 // map out initial stack contents 245 Addr aux_data_base = stack_base - aux_data_size - info_block_padding; 246 Addr env_data_base = aux_data_base - env_data_size; 247 Addr arg_data_base = env_data_base - arg_data_size; 248 Addr auxv_array_base = arg_data_base - aux_array_size; 249 Addr envp_array_base = auxv_array_base - envp_array_size; 250 Addr argv_array_base = envp_array_base - argv_array_size; 251 Addr argc_base = argv_array_base - argc_size; 252 Addr window_save_base = argc_base - window_save_size; 253 254 DPRINTF(Sparc, "The addresses of items on the initial stack:\n"); 255 DPRINTF(Sparc, "0x%x - aux data\n", aux_data_base); 256 DPRINTF(Sparc, "0x%x - env data\n", env_data_base); 257 DPRINTF(Sparc, "0x%x - arg data\n", arg_data_base); 258 DPRINTF(Sparc, "0x%x - auxv array\n", auxv_array_base); 259 DPRINTF(Sparc, "0x%x - envp array\n", envp_array_base); 260 DPRINTF(Sparc, "0x%x - argv array\n", argv_array_base); 261 DPRINTF(Sparc, "0x%x - argc \n", argc_base); 262 DPRINTF(Sparc, "0x%x - window save\n", window_save_base); 263 DPRINTF(Sparc, "0x%x - stack min\n", stack_min); 264 265 // write contents to stack 266 uint64_t argc = argv.size(); 267 uint64_t guestArgc = TheISA::htog(argc); 268 269 //Copy the aux stuff 270 for(int x = 0; x < auxv.size(); x++) 271 { 272 initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize, 273 (uint8_t*)&(auxv[x].a_type), intSize); 274 initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize, 275 (uint8_t*)&(auxv[x].a_val), intSize); 276 } 277 //Write out the terminating zeroed auxilliary vector 278 const uint64_t zero = 0; 279 initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(), 280 (uint8_t*)&zero, 2 * intSize); 281 282 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem); 283 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem); 284 285 initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize); 286 287 threadContexts[0]->setIntReg(ArgumentReg0, argc); 288 threadContexts[0]->setIntReg(ArgumentReg1, argv_array_base); 289 threadContexts[0]->setIntReg(StackPointerReg, stack_min - StackBias); 290 291 Addr prog_entry = objFile->entryPoint(); 292 threadContexts[0]->setPC(prog_entry); 293 threadContexts[0]->setNextPC(prog_entry + sizeof(MachInst)); 294 threadContexts[0]->setNextNPC(prog_entry + (2 * sizeof(MachInst))); 295 296// num_processes++; 297} 298