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gem5/src/arch/sparc/process.cc
Gabe Black d1e533a1e2 X86: Fix argument register indexing. 
Code was assuming that all argument registers followed in order from ArgumentReg0. There is now an ArgumentReg array which is indexed to find the right index. There is a constant, NumArgumentRegs, which can be used to protect against using an invalid ArgumentReg.

--HG--
extra : convert_revision : f448a3ca4d6adc3fc3323562870f70eec05a8a1f
2007-07-26 22:13:14 -07:00

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/*
* 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(const std::string &nm, ObjectFile *objFile,
System *_system, int stdin_fd, int stdout_fd, int stderr_fd,
std::vector<std::string> &argv, std::vector<std::string> &envp,
const std::string &cwd,
uint64_t _uid, uint64_t _euid, uint64_t _gid, uint64_t _egid,
uint64_t _pid, uint64_t _ppid)
: LiveProcess(nm, objFile, _system, stdin_fd, stdout_fd, stderr_fd,
argv, envp, cwd, _uid, _euid, _gid, _egid, _pid, _ppid)
{
// 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 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
Sparc32LiveProcess::startup()
{
argsInit(32 / 8, VMPageSize);
//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
*/
//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);
}
void
Sparc64LiveProcess::startup()
{
argsInit(sizeof(IntReg), VMPageSize);
//From the SPARC ABI
//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);
}
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);
}
void
Sparc64LiveProcess::argsInit(int intSize, int pageSize)
{
typedef M5_64_auxv_t auxv_t;
Process::startup();
string filename;
if(argv.size() < 1)
filename = "";
else
filename = argv[0];
Addr alignmentMask = ~(intSize - 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 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);
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;
//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 - This seems to need an pad for some reason.
int info_block_size =
(mysterious_size +
file_name_size +
env_data_size +
arg_data_size + intSize);
//Each auxilliary vector is two 4 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 =
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
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 + 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;
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
//assert(NumArgumentRegs >= 2);
//threadContexts[0]->setIntReg(ArgumentReg[0], argc);
//threadContexts[0]->setIntReg(ArgumentReg[1], 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++;
}
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