diff options
Diffstat (limited to 'src/arch/sparc/process.cc')
| -rw-r--r-- | src/arch/sparc/process.cc | 414 |
1 files changed, 308 insertions, 106 deletions
diff --git a/src/arch/sparc/process.cc b/src/arch/sparc/process.cc index 1e639b9a5..c3b833562 100644 --- a/src/arch/sparc/process.cc +++ b/src/arch/sparc/process.cc @@ -30,6 +30,7 @@ */ #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" @@ -59,14 +60,6 @@ SparcLiveProcess::SparcLiveProcess(const std::string &nm, ObjectFile *objFile, brk_point = objFile->dataBase() + objFile->dataSize() + objFile->bssSize(); brk_point = roundUp(brk_point, VMPageSize); - // Set up stack. On SPARC Linux, stack goes from the top of memory - // downward, less the hole for the kernel address space. - stack_base = (Addr)0x80000000000ULL; - - // Set up region for mmaps. Tru64 seems to start just above 0 and - // grow up from there. - mmap_start = mmap_end = 0xfffff80000000000ULL; - // Set pointer for next thread stack. Reserve 8M for main stack. next_thread_stack_base = stack_base - (8 * 1024 * 1024); @@ -75,10 +68,22 @@ SparcLiveProcess::SparcLiveProcess(const std::string &nm, ObjectFile *objFile, spillStart = 0; } +void SparcLiveProcess::handleTrap(int trapNum, ThreadContext *tc) +{ + switch(trapNum) + { + case 0x03: //Flush window trap + warn("Ignoring request to flush register windows.\n"); + break; + default: + panic("Unimplemented trap to operating system: trap number %#x.\n", trapNum); + } +} + void -SparcLiveProcess::startup() +Sparc32LiveProcess::startup() { - argsInit(sizeof(IntReg), VMPageSize); + argsInit(32 / 8, VMPageSize); //From the SPARC ABI @@ -117,94 +122,64 @@ SparcLiveProcess::startup() threadContexts[0]->setMiscReg(MISCREG_ASI, ASI_PRIMARY); } -m5_auxv_t buildAuxVect(int64_t type, int64_t val) +void +Sparc64LiveProcess::startup() { - m5_auxv_t result; - result.a_type = TheISA::htog(type); - result.a_val = TheISA::htog(val); - return result; -} + argsInit(sizeof(IntReg), VMPageSize); + + //From the SPARC ABI + + //The process runs in user mode + threadContexts[0]->setMiscRegWithEffect(MISCREG_PSTATE, 0x02); + + //Setup default FP state + threadContexts[0]->setMiscReg(MISCREG_FSR, 0); -//We only use 19 instructions for the trap handlers, but there would be -//space for 32 in a real SPARC trap table. -const int numFillInsts = 32; -const int numSpillInsts = 32; + threadContexts[0]->setMiscReg(MISCREG_TICK, 0); + // + /* + * Register window management registers + */ + + //No windows contain info from other programs + //threadContexts[0]->setMiscReg(MISCREG_OTHERWIN, 0); + threadContexts[0]->setIntReg(NumIntArchRegs + 6, 0); + //There are no windows to pop + //threadContexts[0]->setMiscReg(MISCREG_CANRESTORE, 0); + threadContexts[0]->setIntReg(NumIntArchRegs + 4, 0); + //All windows are available to save into + //threadContexts[0]->setMiscReg(MISCREG_CANSAVE, NWindows - 2); + threadContexts[0]->setIntReg(NumIntArchRegs + 3, NWindows - 2); + //All windows are "clean" + //threadContexts[0]->setMiscReg(MISCREG_CLEANWIN, NWindows); + threadContexts[0]->setIntReg(NumIntArchRegs + 5, NWindows); + //Start with register window 0 + threadContexts[0]->setMiscReg(MISCREG_CWP, 0); + //Always use spill and fill traps 0 + //threadContexts[0]->setMiscReg(MISCREG_WSTATE, 0); + threadContexts[0]->setIntReg(NumIntArchRegs + 7, 0); + //Set the trap level to 0 + threadContexts[0]->setMiscReg(MISCREG_TL, 0); + //Set the ASI register to something fixed + threadContexts[0]->setMiscReg(MISCREG_ASI, ASI_PRIMARY); +} -MachInst fillHandler[numFillInsts] = +M5_32_auxv_t::M5_32_auxv_t(int32_t type, int32_t val) { - htog(0x87802018), //wr %g0, ASI_AIUP, %asi - htog(0xe0dba7ff), //ldxa [%sp + BIAS + (0*8)] %asi, %l0 - htog(0xe2dba807), //ldxa [%sp + BIAS + (1*8)] %asi, %l1 - htog(0xe4dba80f), //ldxa [%sp + BIAS + (2*8)] %asi, %l2 - htog(0xe6dba817), //ldxa [%sp + BIAS + (3*8)] %asi, %l3 - htog(0xe8dba81f), //ldxa [%sp + BIAS + (4*8)] %asi, %l4 - htog(0xeadba827), //ldxa [%sp + BIAS + (5*8)] %asi, %l5 - htog(0xecdba82f), //ldxa [%sp + BIAS + (6*8)] %asi, %l6 - htog(0xeedba837), //ldxa [%sp + BIAS + (7*8)] %asi, %l7 - htog(0xf0dba83f), //ldxa [%sp + BIAS + (8*8)] %asi, %i0 - htog(0xf2dba847), //ldxa [%sp + BIAS + (9*8)] %asi, %i1 - htog(0xf4dba84f), //ldxa [%sp + BIAS + (10*8)] %asi, %i2 - htog(0xf6dba857), //ldxa [%sp + BIAS + (11*8)] %asi, %i3 - htog(0xf8dba85f), //ldxa [%sp + BIAS + (12*8)] %asi, %i4 - htog(0xfadba867), //ldxa [%sp + BIAS + (13*8)] %asi, %i5 - htog(0xfcdba86f), //ldxa [%sp + BIAS + (14*8)] %asi, %i6 - htog(0xfedba877), //ldxa [%sp + BIAS + (15*8)] %asi, %i7 - htog(0x83880000), //restored - htog(0x83F00000), //retry - htog(0x00000000), //illtrap - htog(0x00000000), //illtrap - htog(0x00000000), //illtrap - htog(0x00000000), //illtrap - htog(0x00000000), //illtrap - htog(0x00000000), //illtrap - htog(0x00000000), //illtrap - htog(0x00000000), //illtrap - htog(0x00000000), //illtrap - htog(0x00000000), //illtrap - htog(0x00000000), //illtrap - htog(0x00000000), //illtrap - htog(0x00000000) //illtrap -}; - -MachInst spillHandler[numSpillInsts] = + a_type = TheISA::htog(type); + a_val = TheISA::htog(val); +} + +M5_64_auxv_t::M5_64_auxv_t(int64_t type, int64_t val) { - htog(0x87802018), //wr %g0, ASI_AIUP, %asi - htog(0xe0f3a7ff), //stxa %l0, [%sp + BIAS + (0*8)] %asi - htog(0xe2f3a807), //stxa %l1, [%sp + BIAS + (1*8)] %asi - htog(0xe4f3a80f), //stxa %l2, [%sp + BIAS + (2*8)] %asi - htog(0xe6f3a817), //stxa %l3, [%sp + BIAS + (3*8)] %asi - htog(0xe8f3a81f), //stxa %l4, [%sp + BIAS + (4*8)] %asi - htog(0xeaf3a827), //stxa %l5, [%sp + BIAS + (5*8)] %asi - htog(0xecf3a82f), //stxa %l6, [%sp + BIAS + (6*8)] %asi - htog(0xeef3a837), //stxa %l7, [%sp + BIAS + (7*8)] %asi - htog(0xf0f3a83f), //stxa %i0, [%sp + BIAS + (8*8)] %asi - htog(0xf2f3a847), //stxa %i1, [%sp + BIAS + (9*8)] %asi - htog(0xf4f3a84f), //stxa %i2, [%sp + BIAS + (10*8)] %asi - htog(0xf6f3a857), //stxa %i3, [%sp + BIAS + (11*8)] %asi - htog(0xf8f3a85f), //stxa %i4, [%sp + BIAS + (12*8)] %asi - htog(0xfaf3a867), //stxa %i5, [%sp + BIAS + (13*8)] %asi - htog(0xfcf3a86f), //stxa %i6, [%sp + BIAS + (14*8)] %asi - htog(0xfef3a877), //stxa %i7, [%sp + BIAS + (15*8)] %asi - htog(0x81880000), //saved - htog(0x83F00000), //retry - htog(0x00000000), //illtrap - htog(0x00000000), //illtrap - htog(0x00000000), //illtrap - htog(0x00000000), //illtrap - htog(0x00000000), //illtrap - htog(0x00000000), //illtrap - htog(0x00000000), //illtrap - htog(0x00000000), //illtrap - htog(0x00000000), //illtrap - htog(0x00000000), //illtrap - htog(0x00000000), //illtrap - htog(0x00000000), //illtrap - htog(0x00000000) //illtrap -}; + a_type = TheISA::htog(type); + a_val = TheISA::htog(val); +} void -SparcLiveProcess::argsInit(int intSize, int pageSize) +Sparc64LiveProcess::argsInit(int intSize, int pageSize) { + typedef M5_64_auxv_t auxv_t; Process::startup(); string filename; @@ -265,34 +240,34 @@ SparcLiveProcess::argsInit(int intSize, int pageSize) if(elfObject) { //Bits which describe the system hardware capabilities - auxv.push_back(buildAuxVect(SPARC_AT_HWCAP, hwcap)); + auxv.push_back(auxv_t(SPARC_AT_HWCAP, hwcap)); //The system page size - auxv.push_back(buildAuxVect(SPARC_AT_PAGESZ, SparcISA::VMPageSize)); + auxv.push_back(auxv_t(SPARC_AT_PAGESZ, SparcISA::VMPageSize)); //Defined to be 100 in the kernel source. //Frequency at which times() increments - auxv.push_back(buildAuxVect(SPARC_AT_CLKTCK, 100)); + auxv.push_back(auxv_t(SPARC_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(buildAuxVect(SPARC_AT_PHDR, elfObject->programHeaderTable())); + auxv.push_back(auxv_t(SPARC_AT_PHDR, elfObject->programHeaderTable())); // This is the size of a program header entry from the elf file. - auxv.push_back(buildAuxVect(SPARC_AT_PHENT, elfObject->programHeaderSize())); + auxv.push_back(auxv_t(SPARC_AT_PHENT, elfObject->programHeaderSize())); // This is the number of program headers from the original elf file. - auxv.push_back(buildAuxVect(SPARC_AT_PHNUM, elfObject->programHeaderCount())); + auxv.push_back(auxv_t(SPARC_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(buildAuxVect(SPARC_AT_BASE, 0)); + auxv.push_back(auxv_t(SPARC_AT_BASE, 0)); //This is hardwired to 0 in the elf loading code in the kernel - auxv.push_back(buildAuxVect(SPARC_AT_FLAGS, 0)); + auxv.push_back(auxv_t(SPARC_AT_FLAGS, 0)); //The entry point to the program - auxv.push_back(buildAuxVect(SPARC_AT_ENTRY, objFile->entryPoint())); + auxv.push_back(auxv_t(SPARC_AT_ENTRY, objFile->entryPoint())); //Different user and group IDs - auxv.push_back(buildAuxVect(SPARC_AT_UID, uid())); - auxv.push_back(buildAuxVect(SPARC_AT_EUID, euid())); - auxv.push_back(buildAuxVect(SPARC_AT_GID, gid())); - auxv.push_back(buildAuxVect(SPARC_AT_EGID, egid())); + auxv.push_back(auxv_t(SPARC_AT_UID, uid())); + auxv.push_back(auxv_t(SPARC_AT_EUID, euid())); + auxv.push_back(auxv_t(SPARC_AT_GID, gid())); + auxv.push_back(auxv_t(SPARC_AT_EGID, egid())); //Whether to enable "secure mode" in the executable - auxv.push_back(buildAuxVect(SPARC_AT_SECURE, 0)); + auxv.push_back(auxv_t(SPARC_AT_SECURE, 0)); } //Figure out how big the initial stack needs to be @@ -419,8 +394,8 @@ SparcLiveProcess::argsInit(int intSize, int pageSize) int spillSize = sizeof(MachInst) * numSpillInsts; fillStart = stack_base; spillStart = fillStart + fillSize; - initVirtMem->writeBlob(fillStart, (uint8_t*)fillHandler, fillSize); - initVirtMem->writeBlob(spillStart, (uint8_t*)spillHandler, spillSize); + initVirtMem->writeBlob(fillStart, (uint8_t*)fillHandler64, fillSize); + initVirtMem->writeBlob(spillStart, (uint8_t*)spillHandler64, spillSize); //Set up the thread context to start running the process threadContexts[0]->setIntReg(ArgumentReg0, argc); @@ -437,3 +412,230 @@ SparcLiveProcess::argsInit(int intSize, int pageSize) // num_processes++; } + +void +Sparc32LiveProcess::argsInit(int intSize, int pageSize) +{ + typedef M5_32_auxv_t auxv_t; + Process::startup(); + + string filename; + if(argv.size() < 1) + filename = ""; + else + filename = argv[0]; + + //Even though this is a 32 bit process, the ABI says we still need to + //maintain double word alignment of the stack pointer. + Addr alignmentMask = ~(8 - 1); + + // load object file into target memory + objFile->loadSections(initVirtMem); + + //These are the auxilliary vector types + enum auxTypes + { + SPARC_AT_HWCAP = 16, + SPARC_AT_PAGESZ = 6, + SPARC_AT_CLKTCK = 17, + SPARC_AT_PHDR = 3, + SPARC_AT_PHENT = 4, + SPARC_AT_PHNUM = 5, + SPARC_AT_BASE = 7, + SPARC_AT_FLAGS = 8, + SPARC_AT_ENTRY = 9, + SPARC_AT_UID = 11, + SPARC_AT_EUID = 12, + SPARC_AT_GID = 13, + SPARC_AT_EGID = 14, + SPARC_AT_SECURE = 23 + }; + + 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(SPARC_AT_HWCAP, hwcap)); + //The system page size + auxv.push_back(auxv_t(SPARC_AT_PAGESZ, SparcISA::VMPageSize)); + //Defined to be 100 in the kernel source. + //Frequency at which times() increments + auxv.push_back(auxv_t(SPARC_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(SPARC_AT_PHDR, elfObject->programHeaderTable())); + // This is the size of a program header entry from the elf file. + auxv.push_back(auxv_t(SPARC_AT_PHENT, elfObject->programHeaderSize())); + // This is the number of program headers from the original elf file. + auxv.push_back(auxv_t(SPARC_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(SPARC_AT_BASE, 0)); + //This is hardwired to 0 in the elf loading code in the kernel + auxv.push_back(auxv_t(SPARC_AT_FLAGS, 0)); + //The entry point to the program + auxv.push_back(auxv_t(SPARC_AT_ENTRY, objFile->entryPoint())); + //Different user and group IDs + auxv.push_back(auxv_t(SPARC_AT_UID, uid())); + auxv.push_back(auxv_t(SPARC_AT_EUID, euid())); + auxv.push_back(auxv_t(SPARC_AT_GID, gid())); + auxv.push_back(auxv_t(SPARC_AT_EGID, egid())); + //Whether to enable "secure mode" in the executable + auxv.push_back(auxv_t(SPARC_AT_SECURE, 0)); + } + + //Figure out how big the initial stack needs to be + + // The unaccounted for 0 at the top of the stack + int mysterious_size = intSize; + + //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 info_block_size = + (file_name_size + + env_data_size + + arg_data_size); + + //Each auxilliary vector is two 8 byte 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; + + int space_needed = + mysterious_size + + aux_array_size + + envp_array_size + + argv_array_size + + argc_size + + window_save_size; + + stack_min = stack_base - space_needed; + stack_min &= alignmentMask; + stack_size = stack_base - stack_min; + + // map memory + pTable->allocate(roundDown(stack_min, pageSize), + roundUp(stack_size, pageSize)); + + // map out initial stack contents + uint32_t window_save_base = stack_min; + uint32_t argc_base = window_save_base + window_save_size; + uint32_t argv_array_base = argc_base + argc_size; + uint32_t envp_array_base = argv_array_base + argv_array_size; + uint32_t auxv_array_base = envp_array_base + envp_array_size; + //The info block is pushed up against the top of the stack, while + //the rest of the initial stack frame is aligned to an 8 byte boudary. + uint32_t arg_data_base = stack_base - info_block_size; + uint32_t env_data_base = arg_data_base + arg_data_size; + uint32_t file_name_base = env_data_base + env_data_size; + uint32_t mysterious_base = file_name_base + file_name_size; + + DPRINTF(Sparc, "The addresses of items on the initial stack:\n"); + DPRINTF(Sparc, "0x%x - file name\n", file_name_base); + DPRINTF(Sparc, "0x%x - env data\n", env_data_base); + DPRINTF(Sparc, "0x%x - arg data\n", arg_data_base); + DPRINTF(Sparc, "0x%x - auxv array\n", auxv_array_base); + DPRINTF(Sparc, "0x%x - envp array\n", envp_array_base); + DPRINTF(Sparc, "0x%x - argv array\n", argv_array_base); + DPRINTF(Sparc, "0x%x - argc \n", argc_base); + DPRINTF(Sparc, "0x%x - window save\n", window_save_base); + DPRINTF(Sparc, "0x%x - stack min\n", stack_min); + + // write contents to stack + + // figure out argc + uint32_t argc = argv.size(); + uint32_t guestArgc = TheISA::htog(argc); + + //Write out the mysterious 0 + uint64_t mysterious_zero = 0; + initVirtMem->writeBlob(mysterious_base, + (uint8_t*)&mysterious_zero, mysterious_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 uint64_t zero = 0; + initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(), + (uint8_t*)&zero, 2 * 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); + + //Stuff the trap handlers into the processes address space. + //Since the stack grows down and is the highest area in the processes + //address space, we can put stuff above it and stay out of the way. + int fillSize = sizeof(MachInst) * numFillInsts; + int spillSize = sizeof(MachInst) * numSpillInsts; + fillStart = stack_base; + spillStart = fillStart + fillSize; + initVirtMem->writeBlob(fillStart, (uint8_t*)fillHandler32, fillSize); + initVirtMem->writeBlob(spillStart, (uint8_t*)spillHandler32, spillSize); + + //Set up the thread context to start running the process + threadContexts[0]->setIntReg(ArgumentReg0, argc); + threadContexts[0]->setIntReg(ArgumentReg1, argv_array_base); + threadContexts[0]->setIntReg(StackPointerReg, stack_min); + + uint32_t 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++; +} |