* Ali Saidi
*/
-#include <unistd.h>
#include <fcntl.h>
+#include <unistd.h>
+
+#include <cstdio>
#include <string>
-#include "arch/remote_gdb.hh"
-#include "base/intmath.hh"
#include "base/loader/object_file.hh"
#include "base/loader/symtab.hh"
+#include "base/intmath.hh"
#include "base/statistics.hh"
-#include "config/full_system.hh"
+#include "config/the_isa.hh"
#include "cpu/thread_context.hh"
#include "mem/page_table.hh"
#include "mem/physical.hh"
#include "mem/translating_port.hh"
-#include "params/Process.hh"
#include "params/LiveProcess.hh"
+#include "params/Process.hh"
#include "sim/debug.hh"
#include "sim/process.hh"
#include "sim/process_impl.hh"
#include "sim/syscall_emul.hh"
#include "sim/system.hh"
-#include "arch/isa_specific.hh"
#if THE_ISA == ALPHA_ISA
#include "arch/alpha/linux/process.hh"
#include "arch/alpha/tru64/process.hh"
#include "arch/arm/linux/process.hh"
#elif THE_ISA == X86_ISA
#include "arch/x86/linux/process.hh"
+#elif THE_ISA == POWER_ISA
+#include "arch/power/linux/process.hh"
#else
#error "THE_ISA not set"
#endif
using namespace std;
using namespace TheISA;
-//
-// The purpose of this code is to fake the loader & syscall mechanism
-// when there's no OS: thus there's no resone to use it in FULL_SYSTEM
-// mode when we do have an OS
-//
-#if FULL_SYSTEM
-#error "process.cc not compatible with FULL_SYSTEM"
-#endif
-
// current number of allocated processes
int num_processes = 0;
template class AuxVector<uint64_t>;
Process::Process(ProcessParams * params)
- : SimObject(params), system(params->system), checkpointRestored(false),
- max_stack_size(params->max_stack_size)
+ : SimObject(params), system(params->system),
+ max_stack_size(params->max_stack_size)
{
string in = params->input;
string out = params->output;
mmap_start = mmap_end = 0;
nxm_start = nxm_end = 0;
- pTable = new PageTable(this);
+ pTable = new PageTable(name(), M5_pid);
// other parameters will be initialized when the program is loaded
}
using namespace Stats;
num_syscalls
- .name(name() + ".PROG:num_syscalls")
+ .name(name() + ".num_syscalls")
.desc("Number of system calls")
;
}
ThreadContext *tc;
for (int i = 0; i < size; ++i) {
tc = system->getThreadContext(contextIds[i]);
- if (tc->status() == ThreadContext::Unallocated) {
+ if (tc->status() == ThreadContext::Halted) {
// inactive context, free to use
return tc;
}
}
void
-Process::startup()
+Process::initState()
{
if (contextIds.empty())
fatal("Process %s is not associated with any HW contexts!\n", name());
int
Process::sim_fd(int tgt_fd)
{
- if (tgt_fd > MAX_FD)
+ if (tgt_fd < 0 || tgt_fd > MAX_FD)
return -1;
return fd_map[tgt_fd].fd;
Process::FdMap *
Process::sim_fd_obj(int tgt_fd)
{
- if (tgt_fd > MAX_FD)
- panic("sim_fd_obj called in fd out of range.");
+ if (tgt_fd < 0 || tgt_fd > MAX_FD)
+ return NULL;
return &fd_map[tgt_fd];
}
+
+void
+Process::allocateMem(Addr vaddr, int64_t size, bool clobber)
+{
+ int npages = divCeil(size, (int64_t)VMPageSize);
+ Addr paddr = system->allocPhysPages(npages);
+ pTable->map(vaddr, paddr, size, clobber);
+}
+
bool
-Process::checkAndAllocNextPage(Addr vaddr)
+Process::fixupStackFault(Addr vaddr)
{
- // if this is an initial write we might not have
+ // Check if this is already on the stack and there's just no page there
+ // yet.
if (vaddr >= stack_min && vaddr < stack_base) {
- pTable->allocate(roundDown(vaddr, VMPageSize), VMPageSize);
+ allocateMem(roundDown(vaddr, VMPageSize), VMPageSize);
return true;
}
- // We've accessed the next page of the stack, so extend the stack
- // to cover it.
+ // We've accessed the next page of the stack, so extend it to include
+ // this address.
if (vaddr < stack_min && vaddr >= stack_base - max_stack_size) {
while (vaddr < stack_min) {
stack_min -= TheISA::PageBytes;
- if(stack_base - stack_min > max_stack_size)
+ if (stack_base - stack_min > max_stack_size)
fatal("Maximum stack size exceeded\n");
- if(stack_base - stack_min > 8*1024*1024)
+ if (stack_base - stack_min > 8 * 1024 * 1024)
fatal("Over max stack size for one thread\n");
- pTable->allocate(stack_min, TheISA::PageBytes);
+ allocateMem(stack_min, TheISA::PageBytes);
inform("Increasing stack size by one page.");
};
return true;
return false;
}
- // find all offsets for currently open files and save them
+// find all offsets for currently open files and save them
void
-Process::fix_file_offsets() {
+Process::fix_file_offsets()
+{
Process::FdMap *fdo_stdin = &fd_map[STDIN_FILENO];
Process::FdMap *fdo_stdout = &fd_map[STDOUT_FILENO];
Process::FdMap *fdo_stderr = &fd_map[STDERR_FILENO];
stdin_fd = STDIN_FILENO;
else if (in == "None")
stdin_fd = -1;
- else{
- //OPEN standard in and seek to the right location
+ else {
+ // open standard in and seek to the right location
stdin_fd = Process::openInputFile(in);
if (lseek(stdin_fd, fdo_stdin->fileOffset, SEEK_SET) < 0)
panic("Unable to seek to correct location in file: %s", in);
stdout_fd = STDERR_FILENO;
else if (out == "None")
stdout_fd = -1;
- else{
+ else {
stdout_fd = Process::openOutputFile(out);
if (lseek(stdout_fd, fdo_stdout->fileOffset, SEEK_SET) < 0)
panic("Unable to seek to correct location in file: %s", out);
//Seek to correct location before checkpoint
if (lseek(fd,fdo->fileOffset, SEEK_SET) < 0)
- panic("Unable to seek to correct location in file: %s", fdo->filename);
+ panic("Unable to seek to correct location in file: %s",
+ fdo->filename);
}
}
}
}
+
void
-Process::find_file_offsets(){
+Process::find_file_offsets()
+{
for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
Process::FdMap *fdo = &fd_map[free_fd];
if (fdo->fd != -1) {
fdo->fileOffset = lseek(fdo->fd, 0, SEEK_CUR);
- } else {
+ } else {
fdo->filename = "NULL";
fdo->fileOffset = 0;
}
}
void
-Process::setReadPipeSource(int read_pipe_fd, int source_fd){
+Process::setReadPipeSource(int read_pipe_fd, int source_fd)
+{
Process::FdMap *fdo = &fd_map[read_pipe_fd];
fdo->readPipeSource = source_fd;
}
void
Process::serialize(std::ostream &os)
{
- SERIALIZE_SCALAR(initialContextLoaded);
SERIALIZE_SCALAR(brk_point);
SERIALIZE_SCALAR(stack_base);
SERIALIZE_SCALAR(stack_size);
nameOut(os, csprintf("%s.FdMap%d", name(), x));
fd_map[x].serialize(os);
}
+ SERIALIZE_SCALAR(M5_pid);
}
void
Process::unserialize(Checkpoint *cp, const std::string §ion)
{
- UNSERIALIZE_SCALAR(initialContextLoaded);
UNSERIALIZE_SCALAR(brk_point);
UNSERIALIZE_SCALAR(stack_base);
UNSERIALIZE_SCALAR(stack_size);
pTable->unserialize(cp, section);
for (int x = 0; x <= MAX_FD; x++) {
fd_map[x].unserialize(cp, csprintf("%s.FdMap%d", section, x));
- }
+ }
fix_file_offsets();
-
- checkpointRestored = true;
-
+ UNSERIALIZE_OPT_SCALAR(M5_pid);
+ // The above returns a bool so that you could do something if you don't
+ // find the param in the checkpoint if you wanted to, like set a default
+ // but in this case we'll just stick with the instantianted value if not
+ // found.
}
}
}
-void
-LiveProcess::argsInit(int intSize, int pageSize)
-{
- Process::startup();
-
- // load object file into target memory
- objFile->loadSections(initVirtMem);
-
- // Calculate how much space we need for arg & env arrays.
- int argv_array_size = intSize * (argv.size() + 1);
- int envp_array_size = intSize * (envp.size() + 1);
- int arg_data_size = 0;
- for (int i = 0; i < argv.size(); ++i) {
- arg_data_size += argv[i].size() + 1;
- }
- int env_data_size = 0;
- for (int i = 0; i < envp.size(); ++i) {
- env_data_size += envp[i].size() + 1;
- }
-
- int space_needed =
- argv_array_size + envp_array_size + arg_data_size + env_data_size;
- if (space_needed < 32*1024)
- space_needed = 32*1024;
-
- // set bottom of stack
- stack_min = stack_base - space_needed;
- // align it
- stack_min = roundDown(stack_min, pageSize);
- stack_size = stack_base - stack_min;
- // map memory
- pTable->allocate(stack_min, roundUp(stack_size, pageSize));
-
- // map out initial stack contents
- Addr argv_array_base = stack_min + intSize; // room for argc
- Addr envp_array_base = argv_array_base + argv_array_size;
- Addr arg_data_base = envp_array_base + envp_array_size;
- Addr env_data_base = arg_data_base + arg_data_size;
-
- // write contents to stack
- uint64_t argc = argv.size();
- if (intSize == 8)
- argc = htog((uint64_t)argc);
- else if (intSize == 4)
- argc = htog((uint32_t)argc);
- else
- panic("Unknown int size");
-
- initVirtMem->writeBlob(stack_min, (uint8_t*)&argc, intSize);
-
- copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem);
- copyStringArray(envp, envp_array_base, env_data_base, initVirtMem);
-
- ThreadContext *tc = system->getThreadContext(contextIds[0]);
-
- setSyscallArg(tc, 0, argc);
- setSyscallArg(tc, 1, argv_array_base);
- tc->setIntReg(StackPointerReg, stack_min);
-
- Addr prog_entry = objFile->entryPoint();
- tc->setPC(prog_entry);
- tc->setNextPC(prog_entry + sizeof(MachInst));
-
-#if THE_ISA != ALPHA_ISA //e.g. MIPS or Sparc
- tc->setNextNPC(prog_entry + (2 * sizeof(MachInst)));
-#endif
-
- num_processes++;
-}
-
void
LiveProcess::syscall(int64_t callnum, ThreadContext *tc)
{
desc->doSyscall(callnum, this, tc);
}
+IntReg
+LiveProcess::getSyscallArg(ThreadContext *tc, int &i, int width)
+{
+ return getSyscallArg(tc, i);
+}
+
LiveProcess *
LiveProcess::create(LiveProcessParams * params)
{
fatal("Unknown/unsupported operating system.");
}
#elif THE_ISA == ARM_ISA
- if (objFile->getArch() != ObjectFile::Arm)
+ if (objFile->getArch() != ObjectFile::Arm &&
+ objFile->getArch() != ObjectFile::Thumb)
fatal("Object file architecture does not match compiled ISA (ARM).");
switch (objFile->getOpSys()) {
case ObjectFile::UnknownOpSys:
warn("Unknown operating system; assuming Linux.");
// fall through
case ObjectFile::Linux:
- process = new ArmLinuxProcess(params, objFile);
+ process = new ArmLinuxProcess(params, objFile, objFile->getArch());
+ break;
+ case ObjectFile::LinuxArmOABI:
+ fatal("M5 does not support ARM OABI binaries. Please recompile with an"
+ " EABI compiler.");
+ default:
+ fatal("Unknown/unsupported operating system.");
+ }
+#elif THE_ISA == POWER_ISA
+ if (objFile->getArch() != ObjectFile::Power)
+ fatal("Object file architecture does not match compiled ISA (Power).");
+ switch (objFile->getOpSys()) {
+ case ObjectFile::UnknownOpSys:
+ warn("Unknown operating system; assuming Linux.");
+ // fall through
+ case ObjectFile::Linux:
+ process = new PowerLinuxProcess(params, objFile);
break;
default:
#error "THE_ISA not set"
#endif
-
if (process == NULL)
fatal("Unknown error creating process object.");
return process;
projects / gem5.git / blobdiff