| /* |
| * Copyright (c) 2003-2004 The Regents of The University of Michigan |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer; |
| * redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution; |
| * neither the name of the copyright holders nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| * Authors: Gabe Black |
| * Ali Saidi |
| */ |
| |
| #include "arch/sparc/asi.hh" |
| #include "arch/sparc/handlers.hh" |
| #include "arch/sparc/isa_traits.hh" |
| #include "arch/sparc/process.hh" |
| #include "arch/sparc/types.hh" |
| #include "base/loader/object_file.hh" |
| #include "base/loader/elf_object.hh" |
| #include "base/misc.hh" |
| #include "cpu/thread_context.hh" |
| #include "mem/page_table.hh" |
| #include "sim/process_impl.hh" |
| #include "mem/translating_port.hh" |
| #include "sim/system.hh" |
| |
| using namespace std; |
| using namespace SparcISA; |
| |
| |
| SparcLiveProcess::SparcLiveProcess(LiveProcessParams * params, |
| ObjectFile *objFile, Addr _StackBias) |
| : LiveProcess(params, objFile), StackBias(_StackBias) |
| { |
| |
| // XXX all the below need to be updated for SPARC - Ali |
| brk_point = objFile->dataBase() + objFile->dataSize() + objFile->bssSize(); |
| brk_point = roundUp(brk_point, VMPageSize); |
| |
| // Set pointer for next thread stack. Reserve 8M for main stack. |
| next_thread_stack_base = stack_base - (8 * 1024 * 1024); |
| |
| //Initialize these to 0s |
| fillStart = 0; |
| spillStart = 0; |
| } |
| |
| void SparcLiveProcess::handleTrap(int trapNum, ThreadContext *tc) |
| { |
| switch(trapNum) |
| { |
| case 0x01: //Software breakpoint |
| warn("Software breakpoint encountered at pc %#x.\n", tc->readPC()); |
| break; |
| case 0x02: //Division by zero |
| warn("Software signaled a division by zero at pc %#x.\n", |
| tc->readPC()); |
| break; |
| case 0x03: //Flush window trap |
| flushWindows(tc); |
| break; |
| case 0x04: //Clean windows |
| warn("Ignoring process request for clean register " |
| "windows at pc %#x.\n", tc->readPC()); |
| break; |
| case 0x05: //Range check |
| warn("Software signaled a range check at pc %#x.\n", |
| tc->readPC()); |
| break; |
| case 0x06: //Fix alignment |
| warn("Ignoring process request for os assisted unaligned accesses " |
| "at pc %#x.\n", tc->readPC()); |
| break; |
| case 0x07: //Integer overflow |
| warn("Software signaled an integer overflow at pc %#x.\n", |
| tc->readPC()); |
| break; |
| case 0x32: //Get integer condition codes |
| warn("Ignoring process request to get the integer condition codes " |
| "at pc %#x.\n", tc->readPC()); |
| break; |
| case 0x33: //Set integer condition codes |
| warn("Ignoring process request to set the integer condition codes " |
| "at pc %#x.\n", tc->readPC()); |
| break; |
| default: |
| panic("Unimplemented trap to operating system: trap number %#x.\n", trapNum); |
| } |
| } |
| |
| void |
| SparcLiveProcess::startup() |
| { |
| Process::startup(); |
| |
| //From the SPARC ABI |
| |
| //Setup default FP state |
| threadContexts[0]->setMiscRegNoEffect(MISCREG_FSR, 0); |
| |
| threadContexts[0]->setMiscRegNoEffect(MISCREG_TICK, 0); |
| |
| /* |
| * Register window management registers |
| */ |
| |
| //No windows contain info from other programs |
| //threadContexts[0]->setMiscRegNoEffect(MISCREG_OTHERWIN, 0); |
| threadContexts[0]->setIntReg(NumIntArchRegs + 6, 0); |
| //There are no windows to pop |
| //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANRESTORE, 0); |
| threadContexts[0]->setIntReg(NumIntArchRegs + 4, 0); |
| //All windows are available to save into |
| //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANSAVE, NWindows - 2); |
| threadContexts[0]->setIntReg(NumIntArchRegs + 3, NWindows - 2); |
| //All windows are "clean" |
| //threadContexts[0]->setMiscRegNoEffect(MISCREG_CLEANWIN, NWindows); |
| threadContexts[0]->setIntReg(NumIntArchRegs + 5, NWindows); |
| //Start with register window 0 |
| threadContexts[0]->setMiscRegNoEffect(MISCREG_CWP, 0); |
| //Always use spill and fill traps 0 |
| //threadContexts[0]->setMiscRegNoEffect(MISCREG_WSTATE, 0); |
| threadContexts[0]->setIntReg(NumIntArchRegs + 7, 0); |
| //Set the trap level to 0 |
| threadContexts[0]->setMiscRegNoEffect(MISCREG_TL, 0); |
| //Set the ASI register to something fixed |
| threadContexts[0]->setMiscRegNoEffect(MISCREG_ASI, ASI_PRIMARY); |
| |
| /* |
| * T1 specific registers |
| */ |
| //Turn on the icache, dcache, dtb translation, and itb translation. |
| threadContexts[0]->setMiscRegNoEffect(MISCREG_MMU_LSU_CTRL, 15); |
| } |
| |
| void |
| Sparc32LiveProcess::startup() |
| { |
| if (checkpointRestored) |
| return; |
| |
| SparcLiveProcess::startup(); |
| |
| //The process runs in user mode with 32 bit addresses |
| threadContexts[0]->setMiscReg(MISCREG_PSTATE, 0x0a); |
| |
| argsInit(32 / 8, VMPageSize); |
| } |
| |
| void |
| Sparc64LiveProcess::startup() |
| { |
| if (checkpointRestored) |
| return; |
| |
| SparcLiveProcess::startup(); |
| |
| //The process runs in user mode |
| threadContexts[0]->setMiscReg(MISCREG_PSTATE, 0x02); |
| |
| argsInit(sizeof(IntReg), VMPageSize); |
| } |
| |
| template<class IntType> |
| void |
| SparcLiveProcess::argsInit(int pageSize) |
| { |
| int intSize = sizeof(IntType); |
| |
| typedef M5_auxv_t<IntType> auxv_t; |
| |
| std::vector<auxv_t> auxv; |
| |
| string filename; |
| if(argv.size() < 1) |
| filename = ""; |
| else |
| filename = argv[0]; |
| |
| //Even for a 32 bit process, the ABI says we still need to |
| //maintain double word alignment of the stack pointer. |
| uint64_t align = 16; |
| |
| // load object file into target memory |
| objFile->loadSections(initVirtMem); |
| |
| enum hardwareCaps |
| { |
| M5_HWCAP_SPARC_FLUSH = 1, |
| M5_HWCAP_SPARC_STBAR = 2, |
| M5_HWCAP_SPARC_SWAP = 4, |
| M5_HWCAP_SPARC_MULDIV = 8, |
| M5_HWCAP_SPARC_V9 = 16, |
| //This one should technically only be set |
| //if there is a cheetah or cheetah_plus tlb, |
| //but we'll use it all the time |
| M5_HWCAP_SPARC_ULTRA3 = 32 |
| }; |
| |
| const int64_t hwcap = |
| M5_HWCAP_SPARC_FLUSH | |
| M5_HWCAP_SPARC_STBAR | |
| M5_HWCAP_SPARC_SWAP | |
| M5_HWCAP_SPARC_MULDIV | |
| M5_HWCAP_SPARC_V9 | |
| M5_HWCAP_SPARC_ULTRA3; |
| |
| //Setup the auxilliary vectors. These will already have endian conversion. |
| //Auxilliary vectors are loaded only for elf formatted executables. |
| ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile); |
| if(elfObject) |
| { |
| //Bits which describe the system hardware capabilities |
| auxv.push_back(auxv_t(M5_AT_HWCAP, hwcap)); |
| //The system page size |
| auxv.push_back(auxv_t(M5_AT_PAGESZ, SparcISA::VMPageSize)); |
| //Defined to be 100 in the kernel source. |
| //Frequency at which times() increments |
| auxv.push_back(auxv_t(M5_AT_CLKTCK, 100)); |
| // For statically linked executables, this is the virtual address of the |
| // program header tables if they appear in the executable image |
| auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable())); |
| // This is the size of a program header entry from the elf file. |
| auxv.push_back(auxv_t(M5_AT_PHENT, elfObject->programHeaderSize())); |
| // This is the number of program headers from the original elf file. |
| auxv.push_back(auxv_t(M5_AT_PHNUM, elfObject->programHeaderCount())); |
| //This is the address of the elf "interpreter", It should be set |
| //to 0 for regular executables. It should be something else |
| //(not sure what) for dynamic libraries. |
| auxv.push_back(auxv_t(M5_AT_BASE, 0)); |
| //This is hardwired to 0 in the elf loading code in the kernel |
| auxv.push_back(auxv_t(M5_AT_FLAGS, 0)); |
| //The entry point to the program |
| auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint())); |
| //Different user and group IDs |
| auxv.push_back(auxv_t(M5_AT_UID, uid())); |
| auxv.push_back(auxv_t(M5_AT_EUID, euid())); |
| auxv.push_back(auxv_t(M5_AT_GID, gid())); |
| auxv.push_back(auxv_t(M5_AT_EGID, egid())); |
| //Whether to enable "secure mode" in the executable |
| auxv.push_back(auxv_t(M5_AT_SECURE, 0)); |
| } |
| |
| //Figure out how big the initial stack needs to be |
| |
| // The unaccounted for 8 byte 0 at the top of the stack |
| int sentry_size = 8; |
| |
| //This is the name of the file which is present on the initial stack |
| //It's purpose is to let the user space linker examine the original file. |
| int file_name_size = filename.size() + 1; |
| |
| int env_data_size = 0; |
| for (int i = 0; i < envp.size(); ++i) { |
| env_data_size += envp[i].size() + 1; |
| } |
| int arg_data_size = 0; |
| for (int i = 0; i < argv.size(); ++i) { |
| arg_data_size += argv[i].size() + 1; |
| } |
| |
| //The info_block. |
| int base_info_block_size = |
| sentry_size + file_name_size + env_data_size + arg_data_size; |
| |
| int info_block_size = roundUp(base_info_block_size, align); |
| |
| int info_block_padding = info_block_size - base_info_block_size; |
| |
| //Each auxilliary vector is two words |
| int aux_array_size = intSize * 2 * (auxv.size() + 1); |
| |
| int envp_array_size = intSize * (envp.size() + 1); |
| int argv_array_size = intSize * (argv.size() + 1); |
| |
| int argc_size = intSize; |
| int window_save_size = intSize * 16; |
| |
| //Figure out the size of the contents of the actual initial frame |
| int frame_size = |
| aux_array_size + |
| envp_array_size + |
| argv_array_size + |
| argc_size + |
| window_save_size; |
| |
| //There needs to be padding after the auxiliary vector data so that the |
| //very bottom of the stack is aligned properly. |
| int aligned_partial_size = roundUp(frame_size, align); |
| int aux_padding = aligned_partial_size - frame_size; |
| |
| int space_needed = |
| info_block_size + |
| aux_padding + |
| frame_size; |
| |
| stack_min = stack_base - space_needed; |
| stack_min = roundDown(stack_min, align); |
| stack_size = stack_base - stack_min; |
| |
| // Allocate space for the stack |
| pTable->allocate(roundDown(stack_min, pageSize), |
| roundUp(stack_size, pageSize)); |
| |
| // map out initial stack contents |
| IntType sentry_base = stack_base - sentry_size; |
| IntType file_name_base = sentry_base - file_name_size; |
| IntType env_data_base = file_name_base - env_data_size; |
| IntType arg_data_base = env_data_base - arg_data_size; |
| IntType auxv_array_base = arg_data_base - |
| info_block_padding - aux_array_size - aux_padding; |
| IntType envp_array_base = auxv_array_base - envp_array_size; |
| IntType argv_array_base = envp_array_base - argv_array_size; |
| IntType argc_base = argv_array_base - argc_size; |
| #if TRACING_ON |
| IntType window_save_base = argc_base - window_save_size; |
| #endif |
| |
| DPRINTF(Sparc, "The addresses of items on the initial stack:\n"); |
| DPRINTF(Sparc, "%#x - sentry NULL\n", sentry_base); |
| DPRINTF(Sparc, "filename = %s\n", filename); |
| DPRINTF(Sparc, "%#x - file name\n", file_name_base); |
| DPRINTF(Sparc, "%#x - env data\n", env_data_base); |
| DPRINTF(Sparc, "%#x - arg data\n", arg_data_base); |
| DPRINTF(Sparc, "%#x - auxv array\n", auxv_array_base); |
| DPRINTF(Sparc, "%#x - envp array\n", envp_array_base); |
| DPRINTF(Sparc, "%#x - argv array\n", argv_array_base); |
| DPRINTF(Sparc, "%#x - argc \n", argc_base); |
| DPRINTF(Sparc, "%#x - window save\n", window_save_base); |
| DPRINTF(Sparc, "%#x - stack min\n", stack_min); |
| |
| assert(window_save_base == stack_min); |
| |
| // write contents to stack |
| |
| // figure out argc |
| IntType argc = argv.size(); |
| IntType guestArgc = TheISA::htog(argc); |
| |
| //Write out the sentry void * |
| uint64_t sentry_NULL = 0; |
| initVirtMem->writeBlob(sentry_base, |
| (uint8_t*)&sentry_NULL, sentry_size); |
| |
| //Write the file name |
| initVirtMem->writeString(file_name_base, filename.c_str()); |
| |
| //Copy the aux stuff |
| for(int x = 0; x < auxv.size(); x++) |
| { |
| initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize, |
| (uint8_t*)&(auxv[x].a_type), intSize); |
| initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize, |
| (uint8_t*)&(auxv[x].a_val), intSize); |
| } |
| |
| //Write out the terminating zeroed auxilliary vector |
| const IntType zero = 0; |
| initVirtMem->writeBlob(auxv_array_base + intSize * 2 * auxv.size(), |
| (uint8_t*)&zero, intSize); |
| initVirtMem->writeBlob(auxv_array_base + intSize * (2 * auxv.size() + 1), |
| (uint8_t*)&zero, intSize); |
| |
| copyStringArray(envp, envp_array_base, env_data_base, initVirtMem); |
| copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem); |
| |
| initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize); |
| |
| //Set up space for the trap handlers into the processes address space. |
| //Since the stack grows down and there is reserved address space abov |
| //it, we can put stuff above it and stay out of the way. |
| fillStart = stack_base; |
| spillStart = fillStart + sizeof(MachInst) * numFillInsts; |
| |
| //Set up the thread context to start running the process |
| //assert(NumArgumentRegs >= 2); |
| //threadContexts[0]->setIntReg(ArgumentReg[0], argc); |
| //threadContexts[0]->setIntReg(ArgumentReg[1], argv_array_base); |
| threadContexts[0]->setIntReg(StackPointerReg, stack_min - StackBias); |
| |
| // %g1 is a pointer to a function that should be run at exit. Since we |
| // don't have anything like that, it should be set to 0. |
| threadContexts[0]->setIntReg(1, 0); |
| |
| Addr prog_entry = objFile->entryPoint(); |
| threadContexts[0]->setPC(prog_entry); |
| threadContexts[0]->setNextPC(prog_entry + sizeof(MachInst)); |
| threadContexts[0]->setNextNPC(prog_entry + (2 * sizeof(MachInst))); |
| |
| //Align the "stack_min" to a page boundary. |
| stack_min = roundDown(stack_min, pageSize); |
| |
| // num_processes++; |
| } |
| |
| void |
| Sparc64LiveProcess::argsInit(int intSize, int pageSize) |
| { |
| SparcLiveProcess::argsInit<uint64_t>(pageSize); |
| |
| // Stuff the trap handlers into the process address space |
| initVirtMem->writeBlob(fillStart, |
| (uint8_t*)fillHandler64, sizeof(MachInst) * numFillInsts); |
| initVirtMem->writeBlob(spillStart, |
| (uint8_t*)spillHandler64, sizeof(MachInst) * numSpillInsts); |
| } |
| |
| void |
| Sparc32LiveProcess::argsInit(int intSize, int pageSize) |
| { |
| SparcLiveProcess::argsInit<uint32_t>(pageSize); |
| |
| // Stuff the trap handlers into the process address space |
| initVirtMem->writeBlob(fillStart, |
| (uint8_t*)fillHandler32, sizeof(MachInst) * numFillInsts); |
| initVirtMem->writeBlob(spillStart, |
| (uint8_t*)spillHandler32, sizeof(MachInst) * numSpillInsts); |
| } |
| |
| void Sparc32LiveProcess::flushWindows(ThreadContext *tc) |
| { |
| IntReg Cansave = tc->readIntReg(NumIntArchRegs + 3); |
| IntReg Canrestore = tc->readIntReg(NumIntArchRegs + 4); |
| IntReg Otherwin = tc->readIntReg(NumIntArchRegs + 6); |
| MiscReg CWP = tc->readMiscReg(MISCREG_CWP); |
| MiscReg origCWP = CWP; |
| CWP = (CWP + Cansave + 2) % NWindows; |
| while(NWindows - 2 - Cansave != 0) |
| { |
| if (Otherwin) { |
| panic("Otherwin non-zero.\n"); |
| } else { |
| tc->setMiscReg(MISCREG_CWP, CWP); |
| //Do the stores |
| IntReg sp = tc->readIntReg(StackPointerReg); |
| for (int index = 16; index < 32; index++) { |
| uint32_t regVal = tc->readIntReg(index); |
| regVal = htog(regVal); |
| if (!tc->getMemPort()->tryWriteBlob( |
| sp + (index - 16) * 4, (uint8_t *)®Val, 4)) { |
| warn("Failed to save register to the stack when " |
| "flushing windows.\n"); |
| } |
| } |
| Canrestore--; |
| Cansave++; |
| CWP = (CWP + 1) % NWindows; |
| } |
| } |
| tc->setIntReg(NumIntArchRegs + 3, Cansave); |
| tc->setIntReg(NumIntArchRegs + 4, Canrestore); |
| tc->setMiscReg(MISCREG_CWP, origCWP); |
| } |
| |
| void Sparc64LiveProcess::flushWindows(ThreadContext *tc) |
| { |
| IntReg Cansave = tc->readIntReg(NumIntArchRegs + 3); |
| IntReg Canrestore = tc->readIntReg(NumIntArchRegs + 4); |
| IntReg Otherwin = tc->readIntReg(NumIntArchRegs + 6); |
| MiscReg CWP = tc->readMiscReg(MISCREG_CWP); |
| MiscReg origCWP = CWP; |
| CWP = (CWP + Cansave + 2) % NWindows; |
| while(NWindows - 2 - Cansave != 0) |
| { |
| if (Otherwin) { |
| panic("Otherwin non-zero.\n"); |
| } else { |
| tc->setMiscReg(MISCREG_CWP, CWP); |
| //Do the stores |
| IntReg sp = tc->readIntReg(StackPointerReg); |
| for (int index = 16; index < 32; index++) { |
| IntReg regVal = tc->readIntReg(index); |
| regVal = htog(regVal); |
| if (!tc->getMemPort()->tryWriteBlob( |
| sp + 2047 + (index - 16) * 8, (uint8_t *)®Val, 8)) { |
| warn("Failed to save register to the stack when " |
| "flushing windows.\n"); |
| } |
| } |
| Canrestore--; |
| Cansave++; |
| CWP = (CWP + 1) % NWindows; |
| } |
| } |
| tc->setIntReg(NumIntArchRegs + 3, Cansave); |
| tc->setIntReg(NumIntArchRegs + 4, Canrestore); |
| tc->setMiscReg(MISCREG_CWP, origCWP); |
| } |
