process.cc revision 12441
12207SN/A/* 22207SN/A * Copyright (c) 2003-2004 The Regents of The University of Michigan 32207SN/A * All rights reserved. 42207SN/A * 52207SN/A * Redistribution and use in source and binary forms, with or without 62207SN/A * modification, are permitted provided that the following conditions are 72207SN/A * met: redistributions of source code must retain the above copyright 82207SN/A * notice, this list of conditions and the following disclaimer; 92207SN/A * redistributions in binary form must reproduce the above copyright 102207SN/A * notice, this list of conditions and the following disclaimer in the 112207SN/A * documentation and/or other materials provided with the distribution; 122207SN/A * neither the name of the copyright holders nor the names of its 132207SN/A * contributors may be used to endorse or promote products derived from 142207SN/A * this software without specific prior written permission. 152207SN/A * 162207SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 172207SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 182207SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 192207SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 202207SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 212207SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 222207SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 232207SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 242207SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 252207SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 262207SN/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 302207SN/A */ 312207SN/A 3211793Sbrandon.potter@amd.com#include "arch/sparc/process.hh" 3311793Sbrandon.potter@amd.com 343589Sgblack@eecs.umich.edu#include "arch/sparc/asi.hh" 354111Sgblack@eecs.umich.edu#include "arch/sparc/handlers.hh" 362474SN/A#include "arch/sparc/isa_traits.hh" 376335Sgblack@eecs.umich.edu#include "arch/sparc/registers.hh" 383760Sgblack@eecs.umich.edu#include "arch/sparc/types.hh" 398229Snate@binkert.org#include "base/loader/elf_object.hh" 402454SN/A#include "base/loader/object_file.hh" 4112334Sgabeblack@google.com#include "base/logging.hh" 422680Sktlim@umich.edu#include "cpu/thread_context.hh" 438232Snate@binkert.org#include "debug/Stack.hh" 442561SN/A#include "mem/page_table.hh" 4512431Sgabeblack@google.com#include "params/Process.hh" 4611854Sbrandon.potter@amd.com#include "sim/aux_vector.hh" 474434Ssaidi@eecs.umich.edu#include "sim/process_impl.hh" 4811800Sbrandon.potter@amd.com#include "sim/syscall_return.hh" 492474SN/A#include "sim/system.hh" 502207SN/A 512458SN/Ausing namespace std; 522474SN/Ausing namespace SparcISA; 532458SN/A 545958Sgblack@eecs.umich.edustatic const int FirstArgumentReg = 8; 555958Sgblack@eecs.umich.edu 562207SN/A 5712431Sgabeblack@google.comSparcProcess::SparcProcess(ProcessParams *params, ObjectFile *objFile, 5811851Sbrandon.potter@amd.com Addr _StackBias) 5912432Sgabeblack@google.com : Process(params, new FuncPageTable(params->name, params->pid, PageBytes), 6012432Sgabeblack@google.com objFile), 6112432Sgabeblack@google.com StackBias(_StackBias) 622474SN/A{ 6312441Sgabeblack@google.com fatal_if(params->useArchPT, "Arch page tables not implemented."); 647741Sgblack@eecs.umich.edu // Initialize these to 0s 653415Sgblack@eecs.umich.edu fillStart = 0; 663415Sgblack@eecs.umich.edu spillStart = 0; 672474SN/A} 682474SN/A 697741Sgblack@eecs.umich.eduvoid 7011877Sbrandon.potter@amd.comSparcProcess::handleTrap(int trapNum, ThreadContext *tc, Fault *fault) 714111Sgblack@eecs.umich.edu{ 727720Sgblack@eecs.umich.edu PCState pc = tc->pcState(); 737741Sgblack@eecs.umich.edu switch (trapNum) { 747741Sgblack@eecs.umich.edu case 0x01: // Software breakpoint 757720Sgblack@eecs.umich.edu warn("Software breakpoint encountered at pc %#x.\n", pc.pc()); 765128Sgblack@eecs.umich.edu break; 777741Sgblack@eecs.umich.edu case 0x02: // Division by zero 787720Sgblack@eecs.umich.edu warn("Software signaled a division by zero at pc %#x.\n", pc.pc()); 795128Sgblack@eecs.umich.edu break; 807741Sgblack@eecs.umich.edu case 0x03: // Flush window trap 815128Sgblack@eecs.umich.edu flushWindows(tc); 825128Sgblack@eecs.umich.edu break; 837741Sgblack@eecs.umich.edu case 0x04: // Clean windows 845128Sgblack@eecs.umich.edu warn("Ignoring process request for clean register " 857720Sgblack@eecs.umich.edu "windows at pc %#x.\n", pc.pc()); 865128Sgblack@eecs.umich.edu break; 877741Sgblack@eecs.umich.edu case 0x05: // Range check 887720Sgblack@eecs.umich.edu warn("Software signaled a range check at pc %#x.\n", pc.pc()); 895128Sgblack@eecs.umich.edu break; 907741Sgblack@eecs.umich.edu case 0x06: // Fix alignment 915128Sgblack@eecs.umich.edu warn("Ignoring process request for os assisted unaligned accesses " 927720Sgblack@eecs.umich.edu "at pc %#x.\n", pc.pc()); 935128Sgblack@eecs.umich.edu break; 947741Sgblack@eecs.umich.edu case 0x07: // Integer overflow 957720Sgblack@eecs.umich.edu warn("Software signaled an integer overflow at pc %#x.\n", pc.pc()); 965128Sgblack@eecs.umich.edu break; 977741Sgblack@eecs.umich.edu case 0x32: // Get integer condition codes 985128Sgblack@eecs.umich.edu warn("Ignoring process request to get the integer condition codes " 997720Sgblack@eecs.umich.edu "at pc %#x.\n", pc.pc()); 1005128Sgblack@eecs.umich.edu break; 1017741Sgblack@eecs.umich.edu case 0x33: // Set integer condition codes 1025128Sgblack@eecs.umich.edu warn("Ignoring process request to set the integer condition codes " 1037720Sgblack@eecs.umich.edu "at pc %#x.\n", pc.pc()); 1044111Sgblack@eecs.umich.edu break; 1054111Sgblack@eecs.umich.edu default: 1064111Sgblack@eecs.umich.edu panic("Unimplemented trap to operating system: trap number %#x.\n", trapNum); 1074111Sgblack@eecs.umich.edu } 1084111Sgblack@eecs.umich.edu} 1094111Sgblack@eecs.umich.edu 1102474SN/Avoid 11111851Sbrandon.potter@amd.comSparcProcess::initState() 1124111Sgblack@eecs.umich.edu{ 11311851Sbrandon.potter@amd.com Process::initState(); 1144111Sgblack@eecs.umich.edu 1155713Shsul@eecs.umich.edu ThreadContext *tc = system->getThreadContext(contextIds[0]); 1167741Sgblack@eecs.umich.edu // From the SPARC ABI 1174111Sgblack@eecs.umich.edu 1187741Sgblack@eecs.umich.edu // Setup default FP state 1195713Shsul@eecs.umich.edu tc->setMiscRegNoEffect(MISCREG_FSR, 0); 1202646Ssaidi@eecs.umich.edu 1215713Shsul@eecs.umich.edu tc->setMiscRegNoEffect(MISCREG_TICK, 0); 1224997Sgblack@eecs.umich.edu 1232561SN/A /* 1242561SN/A * Register window management registers 1252561SN/A */ 1262561SN/A 1277741Sgblack@eecs.umich.edu // No windows contain info from other programs 1287741Sgblack@eecs.umich.edu // tc->setMiscRegNoEffect(MISCREG_OTHERWIN, 0); 1295713Shsul@eecs.umich.edu tc->setIntReg(NumIntArchRegs + 6, 0); 1307741Sgblack@eecs.umich.edu // There are no windows to pop 1317741Sgblack@eecs.umich.edu // tc->setMiscRegNoEffect(MISCREG_CANRESTORE, 0); 1325713Shsul@eecs.umich.edu tc->setIntReg(NumIntArchRegs + 4, 0); 1337741Sgblack@eecs.umich.edu // All windows are available to save into 1347741Sgblack@eecs.umich.edu // tc->setMiscRegNoEffect(MISCREG_CANSAVE, NWindows - 2); 1355713Shsul@eecs.umich.edu tc->setIntReg(NumIntArchRegs + 3, NWindows - 2); 1367741Sgblack@eecs.umich.edu // All windows are "clean" 1377741Sgblack@eecs.umich.edu // tc->setMiscRegNoEffect(MISCREG_CLEANWIN, NWindows); 1385713Shsul@eecs.umich.edu tc->setIntReg(NumIntArchRegs + 5, NWindows); 1397741Sgblack@eecs.umich.edu // Start with register window 0 1406337Sgblack@eecs.umich.edu tc->setMiscReg(MISCREG_CWP, 0); 1417741Sgblack@eecs.umich.edu // Always use spill and fill traps 0 1427741Sgblack@eecs.umich.edu // tc->setMiscRegNoEffect(MISCREG_WSTATE, 0); 1435713Shsul@eecs.umich.edu tc->setIntReg(NumIntArchRegs + 7, 0); 1447741Sgblack@eecs.umich.edu // Set the trap level to 0 1455713Shsul@eecs.umich.edu tc->setMiscRegNoEffect(MISCREG_TL, 0); 1467741Sgblack@eecs.umich.edu // Set the ASI register to something fixed 1479375Sgblack@eecs.umich.edu tc->setMiscReg(MISCREG_ASI, ASI_PRIMARY); 1484997Sgblack@eecs.umich.edu 14911850Sbrandon.potter@amd.com // Set the MMU Primary Context Register to hold the process' pid 15011850Sbrandon.potter@amd.com tc->setMiscReg(MISCREG_MMU_P_CONTEXT, _pid); 15111850Sbrandon.potter@amd.com 1524997Sgblack@eecs.umich.edu /* 1534997Sgblack@eecs.umich.edu * T1 specific registers 1544997Sgblack@eecs.umich.edu */ 1557741Sgblack@eecs.umich.edu // Turn on the icache, dcache, dtb translation, and itb translation. 1565713Shsul@eecs.umich.edu tc->setMiscRegNoEffect(MISCREG_MMU_LSU_CTRL, 15); 1572474SN/A} 1582474SN/A 1595285Sgblack@eecs.umich.eduvoid 16011851Sbrandon.potter@amd.comSparc32Process::initState() 1612585SN/A{ 16211851Sbrandon.potter@amd.com SparcProcess::initState(); 1635285Sgblack@eecs.umich.edu 1645713Shsul@eecs.umich.edu ThreadContext *tc = system->getThreadContext(contextIds[0]); 1657741Sgblack@eecs.umich.edu // The process runs in user mode with 32 bit addresses 1668829Sgblack@eecs.umich.edu PSTATE pstate = 0; 1678829Sgblack@eecs.umich.edu pstate.ie = 1; 1688829Sgblack@eecs.umich.edu pstate.am = 1; 1698829Sgblack@eecs.umich.edu tc->setMiscReg(MISCREG_PSTATE, pstate); 1705285Sgblack@eecs.umich.edu 17110318Sandreas.hansson@arm.com argsInit(32 / 8, PageBytes); 1724111Sgblack@eecs.umich.edu} 1733415Sgblack@eecs.umich.edu 1742561SN/Avoid 17511851Sbrandon.potter@amd.comSparc64Process::initState() 1762561SN/A{ 17711851Sbrandon.potter@amd.com SparcProcess::initState(); 1785285Sgblack@eecs.umich.edu 1795713Shsul@eecs.umich.edu ThreadContext *tc = system->getThreadContext(contextIds[0]); 1807741Sgblack@eecs.umich.edu // The process runs in user mode 1818829Sgblack@eecs.umich.edu PSTATE pstate = 0; 1828829Sgblack@eecs.umich.edu pstate.ie = 1; 1838829Sgblack@eecs.umich.edu tc->setMiscReg(MISCREG_PSTATE, pstate); 1845285Sgblack@eecs.umich.edu 18510318Sandreas.hansson@arm.com argsInit(sizeof(IntReg), PageBytes); 1865285Sgblack@eecs.umich.edu} 1875285Sgblack@eecs.umich.edu 1885285Sgblack@eecs.umich.edutemplate<class IntType> 1895285Sgblack@eecs.umich.eduvoid 19011851Sbrandon.potter@amd.comSparcProcess::argsInit(int pageSize) 1915285Sgblack@eecs.umich.edu{ 1925285Sgblack@eecs.umich.edu int intSize = sizeof(IntType); 1935285Sgblack@eecs.umich.edu 1945771Shsul@eecs.umich.edu typedef AuxVector<IntType> auxv_t; 1955285Sgblack@eecs.umich.edu 1965285Sgblack@eecs.umich.edu std::vector<auxv_t> auxv; 1972474SN/A 1983044Sgblack@eecs.umich.edu string filename; 1997741Sgblack@eecs.umich.edu if (argv.size() < 1) 2003044Sgblack@eecs.umich.edu filename = ""; 2013044Sgblack@eecs.umich.edu else 2023044Sgblack@eecs.umich.edu filename = argv[0]; 2033044Sgblack@eecs.umich.edu 2047741Sgblack@eecs.umich.edu // Even for a 32 bit process, the ABI says we still need to 2057741Sgblack@eecs.umich.edu // maintain double word alignment of the stack pointer. 2065286Sgblack@eecs.umich.edu uint64_t align = 16; 2072561SN/A 20811389Sbrandon.potter@amd.com // Patch the ld_bias for dynamic executables. 20911389Sbrandon.potter@amd.com updateBias(); 21011389Sbrandon.potter@amd.com 2112561SN/A // load object file into target memory 2122561SN/A objFile->loadSections(initVirtMem); 2132561SN/A 2142585SN/A enum hardwareCaps 2152585SN/A { 2162585SN/A M5_HWCAP_SPARC_FLUSH = 1, 2172585SN/A M5_HWCAP_SPARC_STBAR = 2, 2182585SN/A M5_HWCAP_SPARC_SWAP = 4, 2192585SN/A M5_HWCAP_SPARC_MULDIV = 8, 2202585SN/A M5_HWCAP_SPARC_V9 = 16, 2217741Sgblack@eecs.umich.edu // This one should technically only be set 2227741Sgblack@eecs.umich.edu // if there is a cheetah or cheetah_plus tlb, 2237741Sgblack@eecs.umich.edu // but we'll use it all the time 2242585SN/A M5_HWCAP_SPARC_ULTRA3 = 32 2252585SN/A }; 2262585SN/A 2272585SN/A const int64_t hwcap = 2282585SN/A M5_HWCAP_SPARC_FLUSH | 2292585SN/A M5_HWCAP_SPARC_STBAR | 2302585SN/A M5_HWCAP_SPARC_SWAP | 2312585SN/A M5_HWCAP_SPARC_MULDIV | 2322585SN/A M5_HWCAP_SPARC_V9 | 2332585SN/A M5_HWCAP_SPARC_ULTRA3; 2342585SN/A 2357741Sgblack@eecs.umich.edu // Setup the auxilliary vectors. These will already have endian conversion. 2367741Sgblack@eecs.umich.edu // Auxilliary vectors are loaded only for elf formatted executables. 2372976Sgblack@eecs.umich.edu ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile); 2387741Sgblack@eecs.umich.edu if (elfObject) { 2397741Sgblack@eecs.umich.edu // Bits which describe the system hardware capabilities 2404793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_HWCAP, hwcap)); 2417741Sgblack@eecs.umich.edu // The system page size 24210318Sandreas.hansson@arm.com auxv.push_back(auxv_t(M5_AT_PAGESZ, SparcISA::PageBytes)); 2437741Sgblack@eecs.umich.edu // Defined to be 100 in the kernel source. 2447741Sgblack@eecs.umich.edu // Frequency at which times() increments 2454793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_CLKTCK, 100)); 2462976Sgblack@eecs.umich.edu // For statically linked executables, this is the virtual address of the 2472976Sgblack@eecs.umich.edu // program header tables if they appear in the executable image 2484793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable())); 2492976Sgblack@eecs.umich.edu // This is the size of a program header entry from the elf file. 2504793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_PHENT, elfObject->programHeaderSize())); 2512976Sgblack@eecs.umich.edu // This is the number of program headers from the original elf file. 2524793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_PHNUM, elfObject->programHeaderCount())); 25311389Sbrandon.potter@amd.com // This is the base address of the ELF interpreter; it should be 25411389Sbrandon.potter@amd.com // zero for static executables or contain the base address for 25511389Sbrandon.potter@amd.com // dynamic executables. 25611389Sbrandon.potter@amd.com auxv.push_back(auxv_t(M5_AT_BASE, getBias())); 2577741Sgblack@eecs.umich.edu // This is hardwired to 0 in the elf loading code in the kernel 2584793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_FLAGS, 0)); 2597741Sgblack@eecs.umich.edu // The entry point to the program 2604793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint())); 2617741Sgblack@eecs.umich.edu // Different user and group IDs 2624793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_UID, uid())); 2634793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_EUID, euid())); 2644793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_GID, gid())); 2654793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_EGID, egid())); 2667741Sgblack@eecs.umich.edu // Whether to enable "secure mode" in the executable 2674793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_SECURE, 0)); 2682976Sgblack@eecs.umich.edu } 2692585SN/A 2707741Sgblack@eecs.umich.edu // Figure out how big the initial stack needs to be 2712561SN/A 2724164Sgblack@eecs.umich.edu // The unaccounted for 8 byte 0 at the top of the stack 2735286Sgblack@eecs.umich.edu int sentry_size = 8; 2744111Sgblack@eecs.umich.edu 2757741Sgblack@eecs.umich.edu // This is the name of the file which is present on the initial stack 2767741Sgblack@eecs.umich.edu // It's purpose is to let the user space linker examine the original file. 2774111Sgblack@eecs.umich.edu int file_name_size = filename.size() + 1; 2784111Sgblack@eecs.umich.edu 2794111Sgblack@eecs.umich.edu int env_data_size = 0; 2804111Sgblack@eecs.umich.edu for (int i = 0; i < envp.size(); ++i) { 2814111Sgblack@eecs.umich.edu env_data_size += envp[i].size() + 1; 2824111Sgblack@eecs.umich.edu } 2834111Sgblack@eecs.umich.edu int arg_data_size = 0; 2844111Sgblack@eecs.umich.edu for (int i = 0; i < argv.size(); ++i) { 2854111Sgblack@eecs.umich.edu arg_data_size += argv[i].size() + 1; 2864111Sgblack@eecs.umich.edu } 2874111Sgblack@eecs.umich.edu 2887741Sgblack@eecs.umich.edu // The info_block. 2895286Sgblack@eecs.umich.edu int base_info_block_size = 2905286Sgblack@eecs.umich.edu sentry_size + file_name_size + env_data_size + arg_data_size; 2915286Sgblack@eecs.umich.edu 2925286Sgblack@eecs.umich.edu int info_block_size = roundUp(base_info_block_size, align); 2935286Sgblack@eecs.umich.edu 2945286Sgblack@eecs.umich.edu int info_block_padding = info_block_size - base_info_block_size; 2954111Sgblack@eecs.umich.edu 2967741Sgblack@eecs.umich.edu // Each auxilliary vector is two words 2974111Sgblack@eecs.umich.edu int aux_array_size = intSize * 2 * (auxv.size() + 1); 2984111Sgblack@eecs.umich.edu 2994111Sgblack@eecs.umich.edu int envp_array_size = intSize * (envp.size() + 1); 3004111Sgblack@eecs.umich.edu int argv_array_size = intSize * (argv.size() + 1); 3014111Sgblack@eecs.umich.edu 3024111Sgblack@eecs.umich.edu int argc_size = intSize; 3034111Sgblack@eecs.umich.edu int window_save_size = intSize * 16; 3044111Sgblack@eecs.umich.edu 3057741Sgblack@eecs.umich.edu // Figure out the size of the contents of the actual initial frame 3065286Sgblack@eecs.umich.edu int frame_size = 3074111Sgblack@eecs.umich.edu aux_array_size + 3084111Sgblack@eecs.umich.edu envp_array_size + 3094111Sgblack@eecs.umich.edu argv_array_size + 3104111Sgblack@eecs.umich.edu argc_size + 3114111Sgblack@eecs.umich.edu window_save_size; 3124111Sgblack@eecs.umich.edu 3137741Sgblack@eecs.umich.edu // There needs to be padding after the auxiliary vector data so that the 3147741Sgblack@eecs.umich.edu // very bottom of the stack is aligned properly. 3155286Sgblack@eecs.umich.edu int aligned_partial_size = roundUp(frame_size, align); 3165286Sgblack@eecs.umich.edu int aux_padding = aligned_partial_size - frame_size; 3175286Sgblack@eecs.umich.edu 3185286Sgblack@eecs.umich.edu int space_needed = 3195286Sgblack@eecs.umich.edu info_block_size + 3205286Sgblack@eecs.umich.edu aux_padding + 3215286Sgblack@eecs.umich.edu frame_size; 3225286Sgblack@eecs.umich.edu 32311905SBrandon.Potter@amd.com memState->setStackMin(memState->getStackBase() - space_needed); 32411905SBrandon.Potter@amd.com memState->setStackMin(roundDown(memState->getStackMin(), align)); 32511905SBrandon.Potter@amd.com memState->setStackSize(memState->getStackBase() - memState->getStackMin()); 3264111Sgblack@eecs.umich.edu 3275285Sgblack@eecs.umich.edu // Allocate space for the stack 32811905SBrandon.Potter@amd.com allocateMem(roundDown(memState->getStackMin(), pageSize), 32911905SBrandon.Potter@amd.com roundUp(memState->getStackSize(), pageSize)); 3304111Sgblack@eecs.umich.edu 3314111Sgblack@eecs.umich.edu // map out initial stack contents 33211905SBrandon.Potter@amd.com IntType sentry_base = memState->getStackBase() - sentry_size; 3335286Sgblack@eecs.umich.edu IntType file_name_base = sentry_base - file_name_size; 3345286Sgblack@eecs.umich.edu IntType env_data_base = file_name_base - env_data_size; 3355286Sgblack@eecs.umich.edu IntType arg_data_base = env_data_base - arg_data_size; 3365286Sgblack@eecs.umich.edu IntType auxv_array_base = arg_data_base - 3375286Sgblack@eecs.umich.edu info_block_padding - aux_array_size - aux_padding; 3385286Sgblack@eecs.umich.edu IntType envp_array_base = auxv_array_base - envp_array_size; 3395286Sgblack@eecs.umich.edu IntType argv_array_base = envp_array_base - argv_array_size; 3405286Sgblack@eecs.umich.edu IntType argc_base = argv_array_base - argc_size; 3415286Sgblack@eecs.umich.edu#if TRACING_ON 3425286Sgblack@eecs.umich.edu IntType window_save_base = argc_base - window_save_size; 3435286Sgblack@eecs.umich.edu#endif 3444111Sgblack@eecs.umich.edu 3455941Sgblack@eecs.umich.edu DPRINTF(Stack, "The addresses of items on the initial stack:\n"); 3465941Sgblack@eecs.umich.edu DPRINTF(Stack, "%#x - sentry NULL\n", sentry_base); 3475941Sgblack@eecs.umich.edu DPRINTF(Stack, "filename = %s\n", filename); 3485941Sgblack@eecs.umich.edu DPRINTF(Stack, "%#x - file name\n", file_name_base); 3495941Sgblack@eecs.umich.edu DPRINTF(Stack, "%#x - env data\n", env_data_base); 3505941Sgblack@eecs.umich.edu DPRINTF(Stack, "%#x - arg data\n", arg_data_base); 3515941Sgblack@eecs.umich.edu DPRINTF(Stack, "%#x - auxv array\n", auxv_array_base); 3525941Sgblack@eecs.umich.edu DPRINTF(Stack, "%#x - envp array\n", envp_array_base); 3535941Sgblack@eecs.umich.edu DPRINTF(Stack, "%#x - argv array\n", argv_array_base); 3545941Sgblack@eecs.umich.edu DPRINTF(Stack, "%#x - argc \n", argc_base); 3555941Sgblack@eecs.umich.edu DPRINTF(Stack, "%#x - window save\n", window_save_base); 35611905SBrandon.Potter@amd.com DPRINTF(Stack, "%#x - stack min\n", memState->getStackMin()); 3574111Sgblack@eecs.umich.edu 35811905SBrandon.Potter@amd.com assert(window_save_base == memState->getStackMin()); 3595286Sgblack@eecs.umich.edu 3604111Sgblack@eecs.umich.edu // write contents to stack 3614111Sgblack@eecs.umich.edu 3624111Sgblack@eecs.umich.edu // figure out argc 3635285Sgblack@eecs.umich.edu IntType argc = argv.size(); 3645567Snate@binkert.org IntType guestArgc = SparcISA::htog(argc); 3654111Sgblack@eecs.umich.edu 3667741Sgblack@eecs.umich.edu // Write out the sentry void * 3675286Sgblack@eecs.umich.edu uint64_t sentry_NULL = 0; 3688852Sandreas.hansson@arm.com initVirtMem.writeBlob(sentry_base, 3695286Sgblack@eecs.umich.edu (uint8_t*)&sentry_NULL, sentry_size); 3704111Sgblack@eecs.umich.edu 3717741Sgblack@eecs.umich.edu // Write the file name 3728852Sandreas.hansson@arm.com initVirtMem.writeString(file_name_base, filename.c_str()); 3734111Sgblack@eecs.umich.edu 3747741Sgblack@eecs.umich.edu // Copy the aux stuff 3757741Sgblack@eecs.umich.edu for (int x = 0; x < auxv.size(); x++) { 3768852Sandreas.hansson@arm.com initVirtMem.writeBlob(auxv_array_base + x * 2 * intSize, 3774111Sgblack@eecs.umich.edu (uint8_t*)&(auxv[x].a_type), intSize); 3788852Sandreas.hansson@arm.com initVirtMem.writeBlob(auxv_array_base + (x * 2 + 1) * intSize, 3794111Sgblack@eecs.umich.edu (uint8_t*)&(auxv[x].a_val), intSize); 3804111Sgblack@eecs.umich.edu } 3815285Sgblack@eecs.umich.edu 3827741Sgblack@eecs.umich.edu // Write out the terminating zeroed auxilliary vector 3835285Sgblack@eecs.umich.edu const IntType zero = 0; 3848852Sandreas.hansson@arm.com initVirtMem.writeBlob(auxv_array_base + intSize * 2 * auxv.size(), 3855286Sgblack@eecs.umich.edu (uint8_t*)&zero, intSize); 3868852Sandreas.hansson@arm.com initVirtMem.writeBlob(auxv_array_base + intSize * (2 * auxv.size() + 1), 3875286Sgblack@eecs.umich.edu (uint8_t*)&zero, intSize); 3884111Sgblack@eecs.umich.edu 3894117Sgblack@eecs.umich.edu copyStringArray(envp, envp_array_base, env_data_base, initVirtMem); 3904117Sgblack@eecs.umich.edu copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem); 3914111Sgblack@eecs.umich.edu 3928852Sandreas.hansson@arm.com initVirtMem.writeBlob(argc_base, (uint8_t*)&guestArgc, intSize); 3934111Sgblack@eecs.umich.edu 3947741Sgblack@eecs.umich.edu // Set up space for the trap handlers into the processes address space. 3957741Sgblack@eecs.umich.edu // Since the stack grows down and there is reserved address space abov 3967741Sgblack@eecs.umich.edu // it, we can put stuff above it and stay out of the way. 39711905SBrandon.Potter@amd.com fillStart = memState->getStackBase(); 3985285Sgblack@eecs.umich.edu spillStart = fillStart + sizeof(MachInst) * numFillInsts; 3994111Sgblack@eecs.umich.edu 4005713Shsul@eecs.umich.edu ThreadContext *tc = system->getThreadContext(contextIds[0]); 4017741Sgblack@eecs.umich.edu // Set up the thread context to start running the process 4027741Sgblack@eecs.umich.edu // assert(NumArgumentRegs >= 2); 4037741Sgblack@eecs.umich.edu // tc->setIntReg(ArgumentReg[0], argc); 4047741Sgblack@eecs.umich.edu // tc->setIntReg(ArgumentReg[1], argv_array_base); 40511905SBrandon.Potter@amd.com tc->setIntReg(StackPointerReg, memState->getStackMin() - StackBias); 4064111Sgblack@eecs.umich.edu 4075231Sgblack@eecs.umich.edu // %g1 is a pointer to a function that should be run at exit. Since we 4085231Sgblack@eecs.umich.edu // don't have anything like that, it should be set to 0. 4095713Shsul@eecs.umich.edu tc->setIntReg(1, 0); 4105231Sgblack@eecs.umich.edu 41111389Sbrandon.potter@amd.com tc->pcState(getStartPC()); 4124111Sgblack@eecs.umich.edu 4137741Sgblack@eecs.umich.edu // Align the "stack_min" to a page boundary. 41411905SBrandon.Potter@amd.com memState->setStackMin(roundDown(memState->getStackMin(), pageSize)); 4154111Sgblack@eecs.umich.edu} 4165128Sgblack@eecs.umich.edu 4175285Sgblack@eecs.umich.eduvoid 41811851Sbrandon.potter@amd.comSparc64Process::argsInit(int intSize, int pageSize) 4195285Sgblack@eecs.umich.edu{ 42011851Sbrandon.potter@amd.com SparcProcess::argsInit<uint64_t>(pageSize); 4215285Sgblack@eecs.umich.edu 4225285Sgblack@eecs.umich.edu // Stuff the trap handlers into the process address space 4238852Sandreas.hansson@arm.com initVirtMem.writeBlob(fillStart, 4245285Sgblack@eecs.umich.edu (uint8_t*)fillHandler64, sizeof(MachInst) * numFillInsts); 4258852Sandreas.hansson@arm.com initVirtMem.writeBlob(spillStart, 4265285Sgblack@eecs.umich.edu (uint8_t*)spillHandler64, sizeof(MachInst) * numSpillInsts); 4275285Sgblack@eecs.umich.edu} 4285285Sgblack@eecs.umich.edu 4295285Sgblack@eecs.umich.eduvoid 43011851Sbrandon.potter@amd.comSparc32Process::argsInit(int intSize, int pageSize) 4315285Sgblack@eecs.umich.edu{ 43211851Sbrandon.potter@amd.com SparcProcess::argsInit<uint32_t>(pageSize); 4335285Sgblack@eecs.umich.edu 4345285Sgblack@eecs.umich.edu // Stuff the trap handlers into the process address space 4358852Sandreas.hansson@arm.com initVirtMem.writeBlob(fillStart, 4365285Sgblack@eecs.umich.edu (uint8_t*)fillHandler32, sizeof(MachInst) * numFillInsts); 4378852Sandreas.hansson@arm.com initVirtMem.writeBlob(spillStart, 4385285Sgblack@eecs.umich.edu (uint8_t*)spillHandler32, sizeof(MachInst) * numSpillInsts); 4395285Sgblack@eecs.umich.edu} 4405285Sgblack@eecs.umich.edu 44111851Sbrandon.potter@amd.comvoid Sparc32Process::flushWindows(ThreadContext *tc) 4425128Sgblack@eecs.umich.edu{ 4435128Sgblack@eecs.umich.edu IntReg Cansave = tc->readIntReg(NumIntArchRegs + 3); 4445128Sgblack@eecs.umich.edu IntReg Canrestore = tc->readIntReg(NumIntArchRegs + 4); 4455128Sgblack@eecs.umich.edu IntReg Otherwin = tc->readIntReg(NumIntArchRegs + 6); 4465128Sgblack@eecs.umich.edu MiscReg CWP = tc->readMiscReg(MISCREG_CWP); 4475128Sgblack@eecs.umich.edu MiscReg origCWP = CWP; 4485128Sgblack@eecs.umich.edu CWP = (CWP + Cansave + 2) % NWindows; 4497741Sgblack@eecs.umich.edu while (NWindows - 2 - Cansave != 0) { 4505128Sgblack@eecs.umich.edu if (Otherwin) { 4515128Sgblack@eecs.umich.edu panic("Otherwin non-zero.\n"); 4525128Sgblack@eecs.umich.edu } else { 4535128Sgblack@eecs.umich.edu tc->setMiscReg(MISCREG_CWP, CWP); 4547741Sgblack@eecs.umich.edu // Do the stores 4555128Sgblack@eecs.umich.edu IntReg sp = tc->readIntReg(StackPointerReg); 4565128Sgblack@eecs.umich.edu for (int index = 16; index < 32; index++) { 4575287Sgblack@eecs.umich.edu uint32_t regVal = tc->readIntReg(index); 4585128Sgblack@eecs.umich.edu regVal = htog(regVal); 4598852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryWriteBlob( 4605128Sgblack@eecs.umich.edu sp + (index - 16) * 4, (uint8_t *)®Val, 4)) { 4615128Sgblack@eecs.umich.edu warn("Failed to save register to the stack when " 4625128Sgblack@eecs.umich.edu "flushing windows.\n"); 4635128Sgblack@eecs.umich.edu } 4645128Sgblack@eecs.umich.edu } 4655128Sgblack@eecs.umich.edu Canrestore--; 4665128Sgblack@eecs.umich.edu Cansave++; 4675128Sgblack@eecs.umich.edu CWP = (CWP + 1) % NWindows; 4685128Sgblack@eecs.umich.edu } 4695128Sgblack@eecs.umich.edu } 4705128Sgblack@eecs.umich.edu tc->setIntReg(NumIntArchRegs + 3, Cansave); 4715128Sgblack@eecs.umich.edu tc->setIntReg(NumIntArchRegs + 4, Canrestore); 4725128Sgblack@eecs.umich.edu tc->setMiscReg(MISCREG_CWP, origCWP); 4735128Sgblack@eecs.umich.edu} 4745128Sgblack@eecs.umich.edu 4757741Sgblack@eecs.umich.eduvoid 47611851Sbrandon.potter@amd.comSparc64Process::flushWindows(ThreadContext *tc) 4775128Sgblack@eecs.umich.edu{ 4785128Sgblack@eecs.umich.edu IntReg Cansave = tc->readIntReg(NumIntArchRegs + 3); 4795128Sgblack@eecs.umich.edu IntReg Canrestore = tc->readIntReg(NumIntArchRegs + 4); 4805128Sgblack@eecs.umich.edu IntReg Otherwin = tc->readIntReg(NumIntArchRegs + 6); 4815128Sgblack@eecs.umich.edu MiscReg CWP = tc->readMiscReg(MISCREG_CWP); 4825128Sgblack@eecs.umich.edu MiscReg origCWP = CWP; 4835128Sgblack@eecs.umich.edu CWP = (CWP + Cansave + 2) % NWindows; 4847741Sgblack@eecs.umich.edu while (NWindows - 2 - Cansave != 0) { 4855128Sgblack@eecs.umich.edu if (Otherwin) { 4865128Sgblack@eecs.umich.edu panic("Otherwin non-zero.\n"); 4875128Sgblack@eecs.umich.edu } else { 4885128Sgblack@eecs.umich.edu tc->setMiscReg(MISCREG_CWP, CWP); 4897741Sgblack@eecs.umich.edu // Do the stores 4905128Sgblack@eecs.umich.edu IntReg sp = tc->readIntReg(StackPointerReg); 4915128Sgblack@eecs.umich.edu for (int index = 16; index < 32; index++) { 4925128Sgblack@eecs.umich.edu IntReg regVal = tc->readIntReg(index); 4935128Sgblack@eecs.umich.edu regVal = htog(regVal); 4948852Sandreas.hansson@arm.com if (!tc->getMemProxy().tryWriteBlob( 4955128Sgblack@eecs.umich.edu sp + 2047 + (index - 16) * 8, (uint8_t *)®Val, 8)) { 4965128Sgblack@eecs.umich.edu warn("Failed to save register to the stack when " 4975128Sgblack@eecs.umich.edu "flushing windows.\n"); 4985128Sgblack@eecs.umich.edu } 4995128Sgblack@eecs.umich.edu } 5005128Sgblack@eecs.umich.edu Canrestore--; 5015128Sgblack@eecs.umich.edu Cansave++; 5025128Sgblack@eecs.umich.edu CWP = (CWP + 1) % NWindows; 5035128Sgblack@eecs.umich.edu } 5045128Sgblack@eecs.umich.edu } 5055128Sgblack@eecs.umich.edu tc->setIntReg(NumIntArchRegs + 3, Cansave); 5065128Sgblack@eecs.umich.edu tc->setIntReg(NumIntArchRegs + 4, Canrestore); 5075128Sgblack@eecs.umich.edu tc->setMiscReg(MISCREG_CWP, origCWP); 5085128Sgblack@eecs.umich.edu} 5095958Sgblack@eecs.umich.edu 5105958Sgblack@eecs.umich.eduIntReg 51111851Sbrandon.potter@amd.comSparc32Process::getSyscallArg(ThreadContext *tc, int &i) 5125958Sgblack@eecs.umich.edu{ 5135958Sgblack@eecs.umich.edu assert(i < 6); 5146701Sgblack@eecs.umich.edu return bits(tc->readIntReg(FirstArgumentReg + i++), 31, 0); 5155958Sgblack@eecs.umich.edu} 5165958Sgblack@eecs.umich.edu 5175958Sgblack@eecs.umich.eduvoid 51811851Sbrandon.potter@amd.comSparc32Process::setSyscallArg(ThreadContext *tc, int i, IntReg val) 5195958Sgblack@eecs.umich.edu{ 5205958Sgblack@eecs.umich.edu assert(i < 6); 5215958Sgblack@eecs.umich.edu tc->setIntReg(FirstArgumentReg + i, bits(val, 31, 0)); 5225958Sgblack@eecs.umich.edu} 5235958Sgblack@eecs.umich.edu 5245958Sgblack@eecs.umich.eduIntReg 52511851Sbrandon.potter@amd.comSparc64Process::getSyscallArg(ThreadContext *tc, int &i) 5265958Sgblack@eecs.umich.edu{ 5275958Sgblack@eecs.umich.edu assert(i < 6); 5286701Sgblack@eecs.umich.edu return tc->readIntReg(FirstArgumentReg + i++); 5295958Sgblack@eecs.umich.edu} 5305958Sgblack@eecs.umich.edu 5315958Sgblack@eecs.umich.eduvoid 53211851Sbrandon.potter@amd.comSparc64Process::setSyscallArg(ThreadContext *tc, int i, IntReg val) 5335958Sgblack@eecs.umich.edu{ 5345958Sgblack@eecs.umich.edu assert(i < 6); 5355958Sgblack@eecs.umich.edu tc->setIntReg(FirstArgumentReg + i, val); 5365958Sgblack@eecs.umich.edu} 5375958Sgblack@eecs.umich.edu 5385958Sgblack@eecs.umich.eduvoid 53911851Sbrandon.potter@amd.comSparcProcess::setSyscallReturn(ThreadContext *tc, SyscallReturn sysret) 5405958Sgblack@eecs.umich.edu{ 5415958Sgblack@eecs.umich.edu // check for error condition. SPARC syscall convention is to 5425958Sgblack@eecs.umich.edu // indicate success/failure in reg the carry bit of the ccr 5435958Sgblack@eecs.umich.edu // and put the return value itself in the standard return value reg (). 5448829Sgblack@eecs.umich.edu PSTATE pstate = tc->readMiscRegNoEffect(MISCREG_PSTATE); 54510223Ssteve.reinhardt@amd.com if (sysret.successful()) { 5465958Sgblack@eecs.umich.edu // no error, clear XCC.C 5475958Sgblack@eecs.umich.edu tc->setIntReg(NumIntArchRegs + 2, 54810223Ssteve.reinhardt@amd.com tc->readIntReg(NumIntArchRegs + 2) & 0xEE); 54910223Ssteve.reinhardt@amd.com IntReg val = sysret.returnValue(); 5508829Sgblack@eecs.umich.edu if (pstate.am) 5515958Sgblack@eecs.umich.edu val = bits(val, 31, 0); 5525958Sgblack@eecs.umich.edu tc->setIntReg(ReturnValueReg, val); 5535958Sgblack@eecs.umich.edu } else { 5545958Sgblack@eecs.umich.edu // got an error, set XCC.C 5555958Sgblack@eecs.umich.edu tc->setIntReg(NumIntArchRegs + 2, 55610223Ssteve.reinhardt@amd.com tc->readIntReg(NumIntArchRegs + 2) | 0x11); 55710223Ssteve.reinhardt@amd.com IntReg val = sysret.errnoValue(); 5588829Sgblack@eecs.umich.edu if (pstate.am) 5595958Sgblack@eecs.umich.edu val = bits(val, 31, 0); 5605958Sgblack@eecs.umich.edu tc->setIntReg(ReturnValueReg, val); 5615958Sgblack@eecs.umich.edu } 5625958Sgblack@eecs.umich.edu} 563