SPARC: Combine the 64 and 32 bit process initialization code.

Alignment is done as it was for 32 bit processes.

--HG--
extra : convert_revision : 9368ad40dcc7911f8fc7ec1468c6a28aa92d196f

1 files changed, 83 insertions, 342 deletions

diff --git a/src/arch/sparc/process.cc b/src/arch/sparc/process.cc
index 0c40fe58d..e1e7c24ad 100644
--- a/src/arch/sparc/process.cc
+++ b/src/arch/sparc/process.cc
@@ -48,8 +48,8 @@ using namespace SparcISA;
 
 
 SparcLiveProcess::SparcLiveProcess(LiveProcessParams * params,
-        ObjectFile *objFile)
-    : LiveProcess(params, objFile)
+        ObjectFile *objFile, Addr _StackBias)
+    : LiveProcess(params, objFile), StackBias(_StackBias)
 {
 
     // XXX all the below need to be updated for SPARC - Ali
@@ -108,23 +108,17 @@ void SparcLiveProcess::handleTrap(int trapNum, ThreadContext *tc)
 }
 
 void
-Sparc32LiveProcess::startup()
+SparcLiveProcess::startup()
 {
-    if (checkpointRestored)
-        return;
-
-    argsInit(32 / 8, VMPageSize);
+    Process::startup();
 
     //From the SPARC ABI
 
-    //The process runs in user mode with 32 bit addresses
-    threadContexts[0]->setMiscReg(MISCREG_PSTATE, 0x0a);
-
     //Setup default FP state
     threadContexts[0]->setMiscRegNoEffect(MISCREG_FSR, 0);
 
     threadContexts[0]->setMiscRegNoEffect(MISCREG_TICK, 0);
-    //
+
     /*
      * Register window management registers
      */
@@ -159,73 +153,42 @@ Sparc32LiveProcess::startup()
 }
 
 void
-Sparc64LiveProcess::startup()
+Sparc32LiveProcess::startup()
 {
     if (checkpointRestored)
         return;
 
-    argsInit(sizeof(IntReg), VMPageSize);
-
-    //From the SPARC ABI
+    SparcLiveProcess::startup();
 
-    //The process runs in user mode
-    threadContexts[0]->setMiscReg(MISCREG_PSTATE, 0x02);
+    //The process runs in user mode with 32 bit addresses
+    threadContexts[0]->setMiscReg(MISCREG_PSTATE, 0x0a);
 
-    //Setup default FP state
-    threadContexts[0]->setMiscRegNoEffect(MISCREG_FSR, 0);
+    argsInit(32 / 8, VMPageSize);
+}
 
-    threadContexts[0]->setMiscRegNoEffect(MISCREG_TICK, 0);
+void
+Sparc64LiveProcess::startup()
+{
+    if (checkpointRestored)
+        return;
 
-    /*
-     * Register window management registers
-     */
+    SparcLiveProcess::startup();
 
-    //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);
+    //The process runs in user mode
+    threadContexts[0]->setMiscReg(MISCREG_PSTATE, 0x02);
 
-    /*
-     * T1 specific registers
-     */
-    //Turn on the icache, dcache, dtb translation, and itb translation.
-    threadContexts[0]->setMiscRegNoEffect(MISCREG_MMU_LSU_CTRL, 15);
+    argsInit(sizeof(IntReg), VMPageSize);
 }
 
-M5_32_auxv_t::M5_32_auxv_t(int32_t type, int32_t val)
+template<class IntType>
+void
+SparcLiveProcess::argsInit(int pageSize)
 {
-    a_type = TheISA::htog(type);
-    a_val = TheISA::htog(val);
-}
+    int intSize = sizeof(IntType);
 
-M5_64_auxv_t::M5_64_auxv_t(int64_t type, int64_t val)
-{
-    a_type = TheISA::htog(type);
-    a_val = TheISA::htog(val);
-}
+    typedef M5_auxv_t<IntType> auxv_t;
 
-void
-Sparc64LiveProcess::argsInit(int intSize, int pageSize)
-{
-    typedef M5_64_auxv_t auxv_t;
-    Process::startup();
+    std::vector<auxv_t> auxv;
 
     string filename;
     if(argv.size() < 1)
@@ -233,7 +196,9 @@ Sparc64LiveProcess::argsInit(int intSize, int pageSize)
     else
         filename = argv[0];
 
-    Addr alignmentMask = ~(intSize - 1);
+    //Even for a 32 bit process, the ABI says we still need to
+    //maintain double word alignment of the stack pointer.
+    Addr alignmentMask = ~(sizeof(uint64_t) - 1);
 
     // load object file into target memory
     objFile->loadSections(initVirtMem);
@@ -259,7 +224,6 @@ Sparc64LiveProcess::argsInit(int intSize, int pageSize)
         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);
@@ -298,250 +262,6 @@ Sparc64LiveProcess::argsInit(int intSize, int pageSize)
 
     //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 needs to be padded so it's size is a multiple of the
-    //alignment mask. Also, it appears that there needs to be at least some
-    //padding, so if the size is already a multiple, we need to increase it
-    //anyway.
-    int info_block_size =
-        (file_name_size +
-        env_data_size +
-        arg_data_size +
-        intSize) & alignmentMask;
-
-    int info_block_padding =
-        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 +
-        info_block_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
-    Addr mysterious_base = stack_base - mysterious_size;
-    Addr file_name_base = mysterious_base - file_name_size;
-    Addr env_data_base = file_name_base - env_data_size;
-    Addr arg_data_base = env_data_base - arg_data_size;
-    Addr auxv_array_base = arg_data_base - aux_array_size - info_block_padding;
-    Addr envp_array_base = auxv_array_base - envp_array_size;
-    Addr argv_array_base = envp_array_base - argv_array_size;
-    Addr argc_base = argv_array_base - argc_size;
-#ifndef NDEBUG
-    // only used in DPRINTF
-    Addr window_save_base = argc_base - window_save_size;
-#endif
-
-    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
-    uint64_t argc = argv.size();
-    uint64_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*)fillHandler64, fillSize);
-    initVirtMem->writeBlob(spillStart, (uint8_t*)spillHandler64, spillSize);
-
-    //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
-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 8 byte 0 at the top of the stack
     int mysterious_size = 8;
 
@@ -565,7 +285,7 @@ Sparc32LiveProcess::argsInit(int intSize, int pageSize)
         env_data_size +
         arg_data_size + intSize);
 
-    //Each auxilliary vector is two 4 byte words
+    //Each auxilliary vector is two words
     int aux_array_size = intSize * 2 * (auxv.size() + 1);
 
     int envp_array_size = intSize * (envp.size() + 1);
@@ -586,39 +306,39 @@ Sparc32LiveProcess::argsInit(int intSize, int pageSize)
     stack_min &= alignmentMask;
     stack_size = stack_base - stack_min;
 
-    // map memory
+    // Allocate space for the stack
     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;
+    IntType window_save_base = stack_min;
+    IntType argc_base = window_save_base + window_save_size;
+    IntType argv_array_base = argc_base + argc_size;
+    IntType envp_array_base = argv_array_base + argv_array_size;
+    IntType 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 + intSize;
-    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;
+    IntType arg_data_base = stack_base - info_block_size + intSize;
+    IntType env_data_base = arg_data_base + arg_data_size;
+    IntType file_name_base = env_data_base + env_data_size;
+    IntType 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);
+    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);
 
     // write contents to stack
 
     // figure out argc
-    uint32_t argc = argv.size();
-    uint32_t guestArgc = TheISA::htog(argc);
+    IntType argc = argv.size();
+    IntType guestArgc = TheISA::htog(argc);
 
     //Write out the mysterious 0
     uint64_t mysterious_zero = 0;
@@ -636,8 +356,9 @@ Sparc32LiveProcess::argsInit(int intSize, int pageSize)
         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;
+    const IntType zero = 0;
     initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(),
             (uint8_t*)&zero, 2 * intSize);
 
@@ -646,27 +367,23 @@ Sparc32LiveProcess::argsInit(int intSize, int pageSize)
 
     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;
+    //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 + fillSize;
-    initVirtMem->writeBlob(fillStart, (uint8_t*)fillHandler32, fillSize);
-    initVirtMem->writeBlob(spillStart, (uint8_t*)spillHandler32, spillSize);
+    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);
+    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);
 
-    uint32_t prog_entry = objFile->entryPoint();
+    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)));
@@ -677,6 +394,30 @@ Sparc32LiveProcess::argsInit(int intSize, int 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);