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

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Alignment is done as it was for 32 bit processes.

--HG--
extra : convert_revision : 9368ad40dcc7911f8fc7ec1468c6a28aa92d196f
This commit is contained in:
Gabe Black
2007-11-29 00:00:02 -08:00
parent a84d9716d6
commit 16e99e4677
58 changed files with 546 additions and 797 deletions
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429
src/arch/sparc/process.cc
View File

@@ -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
*/
@@ -158,74 +152,43 @@ Sparc32LiveProcess::startup()
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;
argsInit(sizeof(IntReg), VMPageSize);
//From the SPARC ABI
SparcLiveProcess::startup();
//The process runs in user mode
threadContexts[0]->setMiscReg(MISCREG_PSTATE, 0x02);
//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);
}
M5_32_auxv_t::M5_32_auxv_t(int32_t type, int32_t val)
{
a_type = TheISA::htog(type);
a_val = TheISA::htog(val);
}
M5_64_auxv_t::M5_64_auxv_t(int64_t type, int64_t val)
{
a_type = TheISA::htog(type);
a_val = TheISA::htog(val);
argsInit(sizeof(IntReg), VMPageSize);
}
template<class IntType>
void
Sparc64LiveProcess::argsInit(int intSize, int pageSize)
SparcLiveProcess::argsInit(int pageSize)
{
typedef M5_64_auxv_t auxv_t;
Process::startup();
int intSize = sizeof(IntType);
typedef M5_auxv_t<IntType> auxv_t;
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);

55
src/arch/sparc/process.hh
View File

@@ -34,6 +34,7 @@
#include <string>
#include <vector>
#include "sim/byteswap.hh"
#include "sim/process.hh"
class ObjectFile;
@@ -43,10 +44,18 @@ class SparcLiveProcess : public LiveProcess
{
protected:
const Addr StackBias;
//The locations of the fill and spill handlers
Addr fillStart, spillStart;
SparcLiveProcess(LiveProcessParams * params, ObjectFile *objFile);
SparcLiveProcess(LiveProcessParams * params,
ObjectFile *objFile, Addr _StackBias);
void startup();
template<class IntType>
void argsInit(int pageSize);
public:
@@ -62,29 +71,32 @@ class SparcLiveProcess : public LiveProcess
virtual void flushWindows(ThreadContext *tc) = 0;
};
struct M5_32_auxv_t
template<class IntType>
struct M5_auxv_t
{
int32_t a_type;
IntType a_type;
union {
int32_t a_val;
int32_t a_ptr;
int32_t a_fcn;
IntType a_val;
IntType a_ptr;
IntType a_fcn;
};
M5_32_auxv_t()
M5_auxv_t()
{}
M5_32_auxv_t(int32_t type, int32_t val);
M5_auxv_t(IntType type, IntType val)
{
a_type = SparcISA::htog(type);
a_val = SparcISA::htog(val);
}
};
class Sparc32LiveProcess : public SparcLiveProcess
{
protected:
std::vector<M5_32_auxv_t> auxv;
Sparc32LiveProcess(LiveProcessParams * params, ObjectFile *objFile) :
SparcLiveProcess(params, objFile)
SparcLiveProcess(params, objFile, 0)
{
// Set up stack. On SPARC Linux, stack goes from the top of memory
// downward, less the hole for the kernel address space.
@@ -103,31 +115,12 @@ class Sparc32LiveProcess : public SparcLiveProcess
void flushWindows(ThreadContext *tc);
};
struct M5_64_auxv_t
{
int64_t a_type;
union {
int64_t a_val;
int64_t a_ptr;
int64_t a_fcn;
};
M5_64_auxv_t()
{}
M5_64_auxv_t(int64_t type, int64_t val);
};
class Sparc64LiveProcess : public SparcLiveProcess
{
protected:
static const Addr StackBias = 2047;
std::vector<M5_64_auxv_t> auxv;
Sparc64LiveProcess(LiveProcessParams * params, ObjectFile *objFile) :
SparcLiveProcess(params, objFile)
SparcLiveProcess(params, objFile, 2047)
{
// Set up stack. On SPARC Linux, stack goes from the top of memory
// downward, less the hole for the kernel address space.