/* do_fork - parent process for a new child process
* @clone_flags: used to guide how to clone the child process
* @stack: the parent's user stack pointer. if stack==0, It means to fork a kernel thread.
* @tf: the trapframe info, which will be copied to child process's proc->tf
*/
int
do_fork(uint32_t clone_flags, uintptr_t stack, struct trapframe *tf) {
int ret = -E_NO_FREE_PROC;
struct proc_struct *proc;
if (nr_process >= MAX_PROCESS) {
goto fork_out;
}
ret = -E_NO_MEM;
//LAB4:EXERCISE2 2013011303
/*
* Some Useful MACROs, Functions and DEFINEs, you can use them in below implementation.
* MACROs or Functions:
* alloc_proc: create a proc struct and init fields (lab4:exercise1)
* setup_kstack: alloc pages with size KSTACKPAGE as process kernel stack
* copy_mm: process "proc" duplicate OR share process "current"'s mm according clone_flags
* if clone_flags & CLONE_VM, then "share" ; else "duplicate"
* copy_thread: setup the trapframe on the process's kernel stack top and
* setup the kernel entry point and stack of process
* hash_proc: add proc into proc hash_list
* get_pid: alloc a unique pid for process
* wakup_proc: set proc->state = PROC_RUNNABLE
* VARIABLES:
* proc_list: the process set's list
* nr_process: the number of process set
*/
// 1. call alloc_proc to allocate a proc_struct
// 2. call setup_kstack to allocate a kernel stack for child process
// 3. call copy_mm to dup OR share mm according clone_flag
// 4. call copy_thread to setup tf & context in proc_struct
// 5. insert proc_struct into hash_list && proc_list
// 6. call wakup_proc to make the new child process RUNNABLE
// 7. set ret vaule using child proc's pid
if ((proc = alloc_proc()) == NULL) {
goto fork_out;
}
proc->pid = get_pid();
proc->parent = current;
nr_process++;
if (setup_kstack(proc)) {
goto bad_fork_cleanup_proc;
}
if (copy_mm(clone_flags, proc)) {
goto bad_fork_cleanup_kstack;
}
copy_thread(proc, stack, tf);
hash_proc(proc);
list_add(&proc_list, &(proc->list_link));
wakeup_proc(proc);
ret = proc->pid;
fork_out:
return ret;
bad_fork_cleanup_kstack:
put_kstack(proc);
bad_fork_cleanup_proc:
kfree(proc);
goto fork_out;
}
void
proc_init_ap(void)
{
int lcpu_idx = pls_read(lcpu_idx);
int lapic_id = pls_read(lapic_id);
pls_write(idleproc, alloc_proc());
if (idleproc == NULL) {
panic("cannot alloc idleproc.\n");
}
idleproc->pid = lcpu_idx;
idleproc->state = PROC_RUNNABLE;
// XXX
// idleproc->kstack = (uintptr_t)bootstack;
idleproc->need_resched = 1;
idleproc->tf = NULL;
if ((idleproc->fs_struct = fs_create()) == NULL) {
panic("create fs_struct (idleproc) failed.\n");
}
fs_count_inc(idleproc->fs_struct);
char namebuf[32];
snprintf(namebuf, 32, "idle/%d", lapic_id);
set_proc_name(idleproc, namebuf);
nr_process ++;
pls_write(current, idleproc);
assert(idleproc != NULL && idleproc->pid == lcpu_idx);
}
// proc_init - set up the first kernel thread idleproc "idle" by itself and
// - create the second kernel thread init_main
void
proc_init(void) {
int i;
list_init(&proc_list);
for (i = 0; i < HASH_LIST_SIZE; i ++) {
list_init(hash_list + i);
}
if ((idleproc = alloc_proc()) == NULL) {
panic("cannot alloc idleproc.\n");
}
idleproc->pid = 0;
idleproc->state = PROC_RUNNABLE;
idleproc->kstack = (uintptr_t)bootstack;
idleproc->need_resched = 1;
set_proc_name(idleproc, "idle");
nr_process ++;
current = idleproc;
int pid = kernel_thread(init_main, "Hello world!!", 0);
if (pid <= 0) {
panic("create init_main failed.\n");
}
initproc = find_proc(pid);
set_proc_name(initproc, "init");
assert(idleproc != NULL && idleproc->pid == 0);
assert(initproc != NULL && initproc->pid == 1);
}
void proc_init_ap(void)
{
int cpuid = myid();
struct proc_struct *idle;
idle = alloc_proc();
if (idle == NULL) {
panic("cannot alloc idleproc.\n");
}
idle->pid = cpuid;
idle->state = PROC_RUNNABLE;
// XXX
// idle->kstack = (uintptr_t)bootstack;
idle->need_resched = 1;
idle->tf = NULL;
if ((idle->fs_struct = fs_create()) == NULL) {
panic("create fs_struct (idleproc) failed.\n");
}
fs_count_inc(idle->fs_struct);
char namebuf[32];
snprintf(namebuf, 32, "idle/%d", cpuid);
set_proc_name(idle, namebuf);
nr_process++;
idleproc = idle;
current = idle;
assert(idleproc != NULL && idleproc->pid == cpuid);
}
/* do_fork - parent process for a new child process
* @clone_flags: used to guide how to clone the child process
* @stack: the parent's user stack pointer. if stack==0, It means to fork a kernel thread.
* @tf: the trapframe info, which will be copied to child process's proc->tf
*/
int
do_fork(uint32_t clone_flags, uintptr_t stack, struct trapframe *tf) {
int ret = -E_NO_FREE_PROC;
struct proc_struct *proc;
if (nr_process >= MAX_PROCESS) {
goto fork_out;
}
ret = -E_NO_MEM;
//LAB4:EXERCISE2 2012011346
/*
* Some Useful MACROs, Functions and DEFINEs, you can use them in below implementation.
* MACROs or Functions:
* alloc_proc: create a proc struct and init fields (lab4:exercise1)
* setup_kstack: alloc pages with size KSTACKPAGE as process kernel stack
* copy_thread: setup the trapframe on the process's kernel stack top and
* setup the kernel entry point and stack of process
* hash_proc: add proc into proc hash_list
* get_pid: alloc a unique pid for process
* wakeup_proc: set proc->state = PROC_RUNNABLE
* VARIABLES:
* proc_list: the process set's list
* nr_process: the number of process set
*/
// 1. call alloc_proc to allocate a proc_struct
proc = alloc_proc();
proc->pid = get_pid();
cprintf("fork pid = %d\n", proc->pid);
// 2. call setup_kstack to allocate a kernel stack for child process
setup_kstack(proc);
// 3. call copy_thread to setup tf & context in proc_struct
copy_thread(proc, stack, tf);
// 4. insert proc_struct into proc_list
list_add_before(&proc_list, &proc->list_link);
// 5. call wakeup_proc to make the new child process RUNNABLE
wakeup_proc(proc);
// 7. set ret vaule using child proc's pid
nr_process++;
ret = proc->pid;
// 8. set parent
proc->parent = current;
fork_out:
return ret;
bad_fork_cleanup_kstack:
put_kstack(proc);
bad_fork_cleanup_proc:
kfree(proc);
goto fork_out;
}
// proc_init - set up the first kernel thread idleproc "idle" by itself and
// - create the second kernel thread init_main
void proc_init(void)
{
int i;
int cpuid = myid();
struct proc_struct *idle;
spinlock_init(&proc_lock);
list_init(&proc_list);
list_init(&proc_mm_list);
for (i = 0; i < HASH_LIST_SIZE; i++) {
list_init(hash_list + i);
}
idle = alloc_proc();
if (idle == NULL) {
panic("cannot alloc idleproc.\n");
}
idle->pid = cpuid;
idle->state = PROC_RUNNABLE;
// No need to be set for kthread (no privilege switch)
// idleproc->kstack = (uintptr_t)bootstack;
idle->need_resched = 1;
idle->tf = NULL;
if ((idle->fs_struct = fs_create()) == NULL) {
panic("create fs_struct (idleproc) failed.\n");
}
fs_count_inc(idle->fs_struct);
char namebuf[32];
snprintf(namebuf, 32, "idle/%d", cpuid);
set_proc_name(idle, namebuf);
nr_process++;
idleproc = idle;
current = idle;
int pid = ucore_kernel_thread(init_main, NULL, 0);
if (pid <= 0) {
panic("create init_main failed.\n");
}
initproc = find_proc(pid);
set_proc_name(initproc, "kinit");
char *proc_init="Proc init OK";
assert(idleproc != NULL && idleproc->pid == cpuid);
assert(initproc != NULL && initproc->pid == sysconf.lcpu_count);
}
// proc_init - set up the first kernel thread idleproc "idle" by itself and
// - create the second kernel thread init_main
void
proc_init(void) {
int i;
int lcpu_idx = pls_read(lcpu_idx);
int lapic_id = pls_read(lapic_id);
int lcpu_count = pls_read(lcpu_count);
list_init(&proc_list);
list_init(&proc_mm_list);
for (i = 0; i < HASH_LIST_SIZE; i ++) {
list_init(hash_list + i);
}
pls_write(idleproc, alloc_proc());
if (idleproc == NULL) {
panic("cannot alloc idleproc.\n");
}
idleproc->pid = lcpu_idx;
idleproc->state = PROC_RUNNABLE;
// XXX
// idleproc->kstack = (uintptr_t)bootstack;
idleproc->need_resched = 1;
idleproc->tf = NULL;
if ((idleproc->fs_struct = fs_create()) == NULL) {
panic("create fs_struct (idleproc) failed.\n");
}
fs_count_inc(idleproc->fs_struct);
char namebuf[32];
snprintf(namebuf, 32, "idle/%d", lapic_id);
set_proc_name(idleproc, namebuf);
nr_process ++;
pls_write(current, idleproc);
int pid = kernel_thread(init_main, NULL, 0);
if (pid <= 0) {
panic("create init_main failed.\n");
}
initproc = find_proc(pid);
set_proc_name(initproc, "init");
assert(idleproc != NULL && idleproc->pid == lcpu_idx);
assert(initproc != NULL && initproc->pid == lcpu_count);
}
main()
{
int nprocs = 4;
//tempo
struct timeval iniciotmp, finaltmp;
int tempogasto;
int pidf,id_wait;
void dt_shareG();
mc_var_inic ();
def_task (0, "inicializa_matriz", sizeof (__inicializa_matriz__));
def_task (1, "multiplica_matriz", sizeof (__multiplica_matriz__));
id_wait=sem_wait_inic(2);
alloc_proc(nprocs);
pidf = exec_task (0, nprocs); /* --- rs30() - create --- */
if (pidf == 0) {
inicializa_matriz();
end_task(); /* --- rs31() - create --- */
}
wait_all();
gettimeofday(&iniciotmp, NULL);
pidf = exec_task (1, nprocs); /* --- rs30() - create --- */
if (pidf == 0) {
multiplica_matriz();
end_task(); /* --- rs31() - create --- */
}
wait_all();
gettimeofday(&finaltmp, NULL);
tempogasto = (int) (1000 * (finaltmp.tv_sec - iniciotmp.tv_sec) + (finaltmp.tv_usec - iniciotmp.tv_usec) / 1000);
printf("Tempo decorrido: %d\n", tempogasto);
wait_all(); /* --- rs307() */
end_program();
remove_semaforo(id_wait);
return 0;
}
// do_fork - parent process for a new child process
// 1. call alloc_proc to allocate a proc_struct
// 2. call setup_kstack to allocate a kernel stack for child process
// 3. call copy_mm to dup OR share mm according clone_flag
// 4. call wakup_proc to make the new child process RUNNABLE
int
do_fork(uint32_t clone_flags, uintptr_t stack, struct trapframe *tf) {
int ret = -E_NO_FREE_PROC;
struct proc_struct *proc;
if (nr_process >= MAX_PROCESS) {
goto fork_out;
}
ret = -E_NO_MEM;
if ((proc = alloc_proc()) == NULL) {
goto fork_out;
}
proc->parent = current;
if (setup_kstack(proc) != 0) {
goto bad_fork_cleanup_proc;
}
if (copy_mm(clone_flags, proc) != 0) {
goto bad_fork_cleanup_kstack;
}
copy_thread(proc, stack, tf);
unsigned long intr_flag;
local_irq_save(intr_flag);
{
proc->pid = get_pid();
hash_proc(proc);
list_add(&proc_list, &(proc->list_link));
nr_process ++;
}
local_irq_restore(intr_flag);
wakeup_proc(proc);
ret = proc->pid;
fork_out:
return ret;
bad_fork_cleanup_kstack:
put_kstack(proc);
bad_fork_cleanup_proc:
kfree(proc);
goto fork_out;
}
ReturnOop BufferedFile::allocate(JvmAllocProc alloc_proc JVM_TRAPS) {
if (alloc_proc != NULL) {
OopDesc* oop_desc =
(OopDesc*)alloc_proc(sizeof(BufferedFileDesc));
if (oop_desc == NULL) {
Throw::out_of_memory_error(JVM_SINGLE_ARG_THROW_0);
return NULL;
}
// Must zero-inititialize the allocated block to match
// ObjectHeap::allocate behavior.
jvm_memset((char*)oop_desc, 0, sizeof(BufferedFileDesc));
return oop_desc;
} else {
return BufferedFile::allocate(JVM_SINGLE_ARG_CHECK_0);
}
}
ReturnOop Buffer::allocate(unsigned int length,
JvmAllocProc alloc_proc JVM_TRAPS) {
if (alloc_proc != NULL) {
OopDesc* oop_desc = (OopDesc*)alloc_proc(sizeof(ArrayDesc) +
length * sizeof(jubyte));
if (oop_desc == NULL) {
Throw::out_of_memory_error(JVM_SINGLE_ARG_THROW_0);
}
// Must zero-inititialize the allocated block to match
// ObjectHeap::allocate behavior.
jvm_memset((char*)oop_desc + sizeof(ArrayDesc), 0,
length * sizeof(jubyte));
*oop_desc->int_field_addr(Array::length_offset()) = length;
return oop_desc;
} else {
return Universe::new_byte_array(length JVM_CHECK_0);
}
}
void proc_init_ap(void)
{
int cpuid = myid();
struct proc_struct *idle;
idle = alloc_proc();
if (idle == NULL) {
panic("cannot alloc idleproc.\n");
}
idle->pid = cpuid;
idle->state = PROC_RUNNABLE;
// No need to be set for kthread (no privilege switch)
// idle->kstack = (uintptr_t)bootstack;
idle->need_resched = 1;
idle->tf = NULL;
if ((idle->fs_struct = fs_create()) == NULL) {
panic("create fs_struct (idleproc) failed.\n");
}
fs_count_inc(idle->fs_struct);
char namebuf[32];
snprintf(namebuf, 32, "idle/%d", cpuid);
set_proc_name(idle, namebuf);
nr_process++;
idleproc = idle;
current = idle;
#if 1
int pid;
char proc_name[32];
if((pid = ucore_kernel_thread(krefcache_cleaner, NULL, 0)) <= 0){
panic("krefcache_cleaner init failed.\n");
}
struct proc_struct* cleaner = find_proc(pid);
snprintf(proc_name, 32, "krefcache/%d", myid());
set_proc_name(cleaner, proc_name);
set_proc_cpu_affinity(cleaner, myid());
nr_process++;
#endif
assert(idleproc != NULL && idleproc->pid == cpuid);
}
// proc_init - set up the first kernel thread idleproc "idle" by itself and
// - create the second kernel thread init_main
void
proc_init(void) {
int i;
list_init(&proc_list);
if ((idleproc = alloc_proc()) == NULL) {
panic("cannot alloc idleproc.\n");
}
idleproc->pid = 0;
idleproc->state = PROC_RUNNABLE;
idleproc->kstack = (uintptr_t)bootstack;
idleproc->need_resched = 1;
set_proc_name(idleproc, "idle");
nr_process ++;
current = idleproc;
int pid1 = kernel_thread(init_main, "init main1: Hello world!!", 0);
int pid2 = kernel_thread(init_main, "init main2: Hello world!!", 0);
int pid3 = kernel_thread(init_main, "init main3: Lab4 spoc discussion!!", 0);
if (pid1 <= 0 || pid2 <= 0 || pid3 <= 0) {
panic("create kernel thread init_main1 or 2 or 3 failed.\n");
}
initproc1 = find_proc(pid1);
initproc2 = find_proc(pid2);
initproc3 = find_proc(pid3);
set_proc_name(initproc1, "init1");
set_proc_name(initproc2, "init2");
set_proc_name(initproc3, "init3");
cprintf("proc_init:: Created kernel thread init_main--> pid: %d, name: %s\n", initproc1->pid, initproc1->name);
cprintf("proc_init:: Created kernel thread init_main--> pid: %d, name: %s\n", initproc2->pid, initproc2->name);
cprintf("proc_init:: Created kernel thread init_main--> pid: %d, name: %s\n", initproc3->pid, initproc3->name);
assert(idleproc != NULL && idleproc->pid == 0);
}
int main()
{
int i, j;
int pidf,id_wait;
void dt_shareG();
mc_var_inic ();
def_task (0, "multiplicarAB", sizeof (__multiplicarAB__));
def_task (1, "multiplicarCD", sizeof (__multiplicarCD__));
def_task (2, "sumar", sizeof (__sumar__));
def_task (3, "print", sizeof (__print__));
id_wait=sem_wait_inic(4);
for (i=0; i<100; i++){
for (j = 0; j < 100; j++)
{
/*A[i][j] = i + j;
B[i][j] = i + 2*j;
C[i][j] = i*2 + j*3;
D[i][j] = i*2 + j;*/
sharedG->A[i][j] = 1;
sharedG->B[i][j] = 1;
sharedG->C[i][j] = 1;
sharedG->D[i][j] = 1;
}
}
alloc_proc(4);
pidf = exec_task (0, 1); /* --- rs30() - create --- */
if (pidf == 0) {
multiplicarAB();
end_task(); /* --- rs31() - create --- */
}
pidf = exec_task (1, 1); /* --- rs30() - create --- */
if (pidf == 0) {
multiplicarCD();
end_task(); /* --- rs31() - create --- */
}
wait_all();
pidf = exec_task (2, 1); /* --- rs30() - create --- */
if (pidf == 0) {
sumar();
end_task(); /* --- rs31() - create --- */
}
wait_proc (2); /* --- wait_proc() --- */
pidf = exec_task (3, 1); /* --- rs30() - create --- */
if (pidf == 0) {
print();
end_task(); /* --- rs31() - create --- */
}
wait_all(); /* --- rs307() */
end_program();
remove_semaforo(id_wait);
return 0;
}
// do_fork - parent process for a new child process
// 1. call alloc_proc to allocate a proc_struct
// 2. call setup_kstack to allocate a kernel stack for child process
// 3. call copy_mm to dup OR share mm according clone_flag
// 4. call wakup_proc to make the new child process RUNNABLE
int
do_fork(uint32_t clone_flags, uintptr_t stack, struct trapframe *tf) {
int ret = -E_NO_FREE_PROC;
struct proc_struct *proc;
if (nr_process >= MAX_PROCESS) {
goto fork_out;
}
ret = -E_NO_MEM;
if ((proc = alloc_proc()) == NULL) {
goto fork_out;
}
proc->parent = current;
list_init(&(proc->thread_group));
assert(current->wait_state == 0);
assert(current->time_slice >= 0);
proc->time_slice = current->time_slice / 2;
current->time_slice -= proc->time_slice;
if (setup_kstack(proc) != 0) {
goto bad_fork_cleanup_proc;
}
if (copy_sem(clone_flags, proc) != 0) {
goto bad_fork_cleanup_kstack;
}
if (copy_fs(clone_flags, proc) != 0) {
goto bad_fork_cleanup_sem;
}
if ( copy_signal(clone_flags, proc) != 0 ) {
goto bad_fork_cleanup_fs;
}
if ( copy_sighand(clone_flags, proc) != 0 ) {
goto bad_fork_cleanup_signal;
}
if (copy_mm(clone_flags, proc) != 0) {
goto bad_fork_cleanup_sighand;
}
if (copy_thread(clone_flags, proc, stack, tf) != 0) {
goto bad_fork_cleanup_sighand;
}
bool intr_flag;
local_intr_save(intr_flag);
{
proc->pid = get_pid();
proc->tid = proc->pid;
hash_proc(proc);
set_links(proc);
if (clone_flags & CLONE_THREAD) {
list_add_before(&(current->thread_group), &(proc->thread_group));
proc->gid = current->gid;
}else{
proc->gid = proc->pid;
}
}
local_intr_restore(intr_flag);
wakeup_proc(proc);
ret = proc->pid;
fork_out:
return ret;
bad_fork_cleanup_sighand:
put_sighand(proc);
bad_fork_cleanup_signal:
put_signal(proc);
bad_fork_cleanup_fs:
put_fs(proc);
bad_fork_cleanup_sem:
put_sem_queue(proc);
bad_fork_cleanup_kstack:
put_kstack(proc);
bad_fork_cleanup_proc:
kfree(proc);
goto fork_out;
}
static void read_procs(void) {
DIR *proc_dir, *task_dir;
struct dirent *pid_dir, *tid_dir;
char filename[64];
FILE *file;
int proc_num;
struct proc_info *proc;
pid_t pid, tid;
int i;
proc_dir = opendir("/proc");
if (!proc_dir) die("Could not open /proc.\n");
new_procs = calloc(INIT_PROCS * (threads ? THREAD_MULT : 1), sizeof(struct proc_info *));
num_new_procs = INIT_PROCS * (threads ? THREAD_MULT : 1);
file = fopen("/proc/stat", "r");
if (!file) die("Could not open /proc/stat.\n");
fscanf(file, "cpu %lu %lu %lu %lu %lu %lu %lu", &new_cpu.utime, &new_cpu.ntime, &new_cpu.stime,
&new_cpu.itime, &new_cpu.iowtime, &new_cpu.irqtime, &new_cpu.sirqtime);
fclose(file);
proc_num = 0;
while ((pid_dir = readdir(proc_dir))) {
if (!isdigit(pid_dir->d_name[0]))
continue;
pid = atoi(pid_dir->d_name);
struct proc_info cur_proc;
if (!threads) {
proc = alloc_proc();
proc->pid = proc->tid = pid;
sprintf(filename, "/proc/%d/stat", pid);
read_stat(filename, proc);
sprintf(filename, "/proc/%d/cmdline", pid);
read_cmdline(filename, proc);
sprintf(filename, "/proc/%d/status", pid);
read_status(filename, proc);
read_policy(pid, proc);
proc->num_threads = 0;
} else {
sprintf(filename, "/proc/%d/cmdline", pid);
read_cmdline(filename, &cur_proc);
sprintf(filename, "/proc/%d/status", pid);
read_status(filename, &cur_proc);
proc = NULL;
}
sprintf(filename, "/proc/%d/task", pid);
task_dir = opendir(filename);
if (!task_dir) continue;
while ((tid_dir = readdir(task_dir))) {
if (!isdigit(tid_dir->d_name[0]))
continue;
if (threads) {
tid = atoi(tid_dir->d_name);
proc = alloc_proc();
proc->pid = pid; proc->tid = tid;
sprintf(filename, "/proc/%d/task/%d/stat", pid, tid);
read_stat(filename, proc);
read_policy(tid, proc);
strcpy(proc->name, cur_proc.name);
proc->uid = cur_proc.uid;
proc->gid = cur_proc.gid;
add_proc(proc_num++, proc);
} else {
proc->num_threads++;
}
}
closedir(task_dir);
if (!threads)
add_proc(proc_num++, proc);
}
for (i = proc_num; i < num_new_procs; i++)
new_procs[i] = NULL;
closedir(proc_dir);
}
/* creates the first process */
void userinit(){
struct proc *p;
/* printf("entered userinit\n"); */
/* allocate memory for stdin wait queue */
_stdin = (struct read_proc*)kmalloc(sizeof(struct read_proc));
memset1((char *)_stdin,0,sizeof(struct read_proc));
memset1((char *)ptable.proc,0,sizeof(ptable));
p=alloc_proc();
initproc=p;
fgproc=initproc;
if(!(p->pml4_t=load_kern_vm())){
/* panic code goes here*/
printf("Kernel Panic: Unable To Create Initproc\n");
}
//inituvm(p->pml4_t,binary_initcode_start,binary_initcode_size);
p->size=FRAME_SIZE;
/* clear the trapframe. this is only done for fist process */
memset1((char *)p->tf,0,sizeof(struct trapframe));
/* p->tf->cs=0x8/\* SEG_KCS() *\/; /\* kernel code segment *\/ */
/* p->tf->ss=0x10/\* SEG_KDS() *\/; /\* kernel data segment *\/ */
p->tf->cs=0x1B; /* user code segment */
p->tf->ss=0x23; /* user data segment */
p->tf->rflags=FL_IF; /* enable interrupts */
/* rsp will be sey in exec */
/* p->tf->rsp=FRAME_SIZE; /\* where does the user stack star from in the proc vm *\/ */
/* rip will be set in exec */
/* p->tf->rip=0; /\* begining of initcode.S *\/ */
strcpy(p->name,"initcode"); /* p->name has a size of 32 bytes */
p->state=RUNNABLE;
/* printf("calling exec\n"); */
/* call exec */
proc=p;
/* set cwd of initproc to root '/' */
strcpy(proc->cwd,"/");
char *a="bin/hello";
char *argv[3];
argv[0]=a;argv[1]="os/sbunix";argv[2]=NULL;
char *envp[7];
envp[0]="PATH=/bin";
envp[1]="envp1";
envp[2]="envp2";
envp[3]="envp3";
envp[4]="envp4";
envp[5]="envp5";
envp[6]=NULL;
cli();
exec("bin/hello",argv,envp);
//p->tf->cs=(SEG_);
/* ltr(0x2Bu); */
/* ltr 0x2B with RPL of 3 for user??? */
ltr(0x2Bu);
/* set WP bit in cr0 */
set_wp_bit();
/* clear ftable */
memset1((char *)ftable.file,0,sizeof(struct file)*NFILE);
/* clear file descriptor table of proc,i.e initproc */
int fd=0;
for(fd=0;fd<NOFILE;fd++){
proc->ofile[fd]=NULL;
}
struct file *fp=NULL;
/* give initproc STDIN, STDOUT,STDERR*/
proc->ofile[STDIN]=filealloc();
if(proc->ofile[STDIN]==NULL){
printf("Kernel Panic, STDIN fiel struct not allocd for initproc\n");
/* panic. kill proc */
}
fp=proc->ofile[STDIN];
fp->type=FD_STDIN;
fp->readable=1; /* mark readable */
fp->writable=0; /* mark not writable */
proc->ofile[STDOUT]=filealloc();
if(proc->ofile[STDOUT]==NULL){
printf("Kernel Panic: STDOUT file struct not allocd for initproc\n");
/* panic. kill proc */
}
fp=proc->ofile[STDOUT];
fp->type=FD_STDOUT;
fp->readable=0; /* mark NOT readable */
fp->writable=1; /* mark writable */
proc->ofile[STDERR]=filealloc();
if(proc->ofile[STDERR]==NULL){
printf("Kernel Panic: STDERR fiel struct not allocd for initproc\n");
/* panic. kill proc */
}
fp=proc->ofile[STDERR];
fp->type=FD_STDERR;
fp->readable=0; /* mark NOT readable */
fp->writable=1; /* mark writable */
/* initialize sleep_head and sleep_tail to NULL */
init_sleep_queue();
init_waitpid_queue();
init_stdin_queue();
/* initialize inodes */
/* init_inodes(); */
/* printf writes to <1MB mem region. Now user page tables are loaded. We cannot access <1MB since we did not map that region into user process < 1MB VM aread */
/* printf("calling scheduler\n"); */
scheduler();
}
