From dd3e40d53e7f675089d0d2e62afe7ce1d5325222 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nicolas=20Hord=C3=A9?= <nicolas@palon.fr>
Date: Wed, 19 Dec 2018 12:06:05 +0100
Subject: [PATCH] =?UTF-8?q?feat:=20gestion=20des=20processus=20&=20t=C3=A2?=
 =?UTF-8?q?ches,=20compilation=20ok=20mais=20syst=C3=A8me=20fig=C3=A9=20au?=
 =?UTF-8?q?=20d=C3=A9marrage?=
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Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 API.md                    |  42 ++---
 include/process.h         |  60 ++++---
 lib/handlers.c            |   2 +-
 lib/makefile              |   6 +-
 lib/process.c             | 348 ++++++++++++++++++++------------------
 lib/shell.c               |   5 +-
 lib/syscall.c             |  16 +-
 programs/include/libsys.h |   6 +-
 programs/lib/libsys.c     |  20 +--
 syscalls.txt              |  70 ++++----
 system/system.c           |   2 +-
 11 files changed, 308 insertions(+), 269 deletions(-)

diff --git a/API.md b/API.md
index 70f8531..0cf463b 100644
--- a/API.md
+++ b/API.md
@@ -9,6 +9,20 @@ All fonctions in the "libsys" library.
 
 ------
 
+`u32 testapi(u32 arg1, u32 arg2, u32 arg3);`
+
+*Description:Simple function to test if SYSCALL API is correctly running*
+
+* syscall id : **0**
+* arguments : **3**
+* * argument 1 : **u32 arg1** *first argument of your choice*
+* * argument 2 : **u32 arg2** *second argument of your choice*
+* * argument 3 : **u32 arg3** *third argument of your choice*
+* results : **u32**
+* dump of register cpu: **yes**
+
+------
+
 `u32 getticks(void);`
 
 *Description:Return the internal value of the timer*
@@ -20,18 +34,6 @@ All fonctions in the "libsys" library.
 
 ------
 
-`void exit(u32 resultcode);`
-
-*Description:End a task for user or kernel domain*
-
-* syscall id : **5**
-* arguments : **1**
-* * argument 1 : **u32 resultcode** *Code result of the execution*
-* results : **void**
-* dump of register cpu: **no**
-
-------
-
 `u8 waitkey(void);`
 
 *Description:Wait for user to press a key and return the ascii code pressed*
@@ -43,17 +45,15 @@ All fonctions in the "libsys" library.
 
 ------
 
-`u32 testapi(u32 arg1, u32 arg2, u32 arg3);`
+`void exit(u32 resultcode);`
 
-*Description:Simple function to test if SYSCALL API is correctly running*
+*Description:End a task for user or kernel domain*
 
-* syscall id : **0**
-* arguments : **3**
-* * argument 1 : **u32 arg1** *first argument of your choice*
-* * argument 2 : **u32 arg2** *second argument of your choice*
-* * argument 3 : **u32 arg3** *third argument of your choice*
-* results : **u32**
-* dump of register cpu: **yes**
+* syscall id : **5**
+* arguments : **1**
+* * argument 1 : **u32 resultcode** *Code result of the execution*
+* results : **void**
+* dump of register cpu: **no**
 
 
 ###  LIBVIDEO
diff --git a/include/process.h b/include/process.h
index 35df93b..62667b2 100644
--- a/include/process.h
+++ b/include/process.h
@@ -141,23 +141,26 @@ typedef struct task
 	stack kernel_stack;
 	u32	status;
 	regs    dump;
+      TAILQ_ENTRY(task) tailq;
 } task __attribute__ ((packed));
 
-typedef struct childs
+typedef TAILQ_HEAD(task_s, task) task_t;
+
+typedef struct child
 {
 	pid_t	pid;
-      TAILQ_ENTRY(childs) tailq;
-} childs __attribute__ ((packed));
+      TAILQ_ENTRY(child) tailq;
+} child __attribute__ ((packed));
 
-typedef TAILQ_HEAD(childs_s, childs) childs_t;
+typedef TAILQ_HEAD(child_s, child) child_t;
 
-typedef struct others
+typedef struct other
 {
 	pid_t	pid;
-      TAILQ_ENTRY(others) tailq;
-} others __attribute__ ((packed));
+      TAILQ_ENTRY(other) tailq;
+} other __attribute__ ((packed));
 
-typedef TAILQ_HEAD(others_s, others) others_t;
+typedef TAILQ_HEAD(other_s, other) other_t;
 
 typedef struct process
 {
@@ -166,8 +169,6 @@ typedef struct process
 	bool    iskernel;
 	pd     *pdd;
 	s8	  priority;
-	childs  *allchilds;
-	others  *allothers;
 	u32     result;
 	u8      status;
 	u8     *exec_low;
@@ -175,30 +176,39 @@ typedef struct process
 	u8     *bss_low;
 	u8     *bss_high;
 	page_t  page_head;
+	task_t  task_head;
+      child_t child_head;
+	other_t other_head;
 	u32     entry;
 } process __attribute__ ((packed));
 
-
-pid_t     getcurrentpid();
-pid_t     getparentpid();
-pid_t     getfreepid();
+pid_t     getcurrentpid(void);
+pid_t     getparentpid(void);
+pid_t     getfreepid(void);
 void      usepid(pid_t pid);
+tid_t	getcurrenttid(void);
+tid_t	maketid(pid_t pid, u32 number);
 
-void      stop();
-void      wait();
-pid_t     fork();
-pid_t     clone();
+void      stop(void);
+void      wait(void);
+pid_t     fork(void);
+pid_t     clone(void);
 pid_t     exec(u8* entry, u8* args, bool kerneltask);
 
-void      switchtask(tid_t tid, bool fromkernelmode);
-tid_t     getnexttask();
+void      switchtask(tid_t tid);
+tid_t     getnexttask(void);
 
-tid_t     createtask(pid_t pid,u8 *entry);
-void      deletetask(pid_t pid);
+task* findtask(tid_t tid);
+task* findcurrenttask(void);
+process* findprocess(pid_t pid);
+process* findcurrentprocess(void);
+
+tid_t createtask(pid_t pid,u8 *entry, bool kerneltask);
+void      deletetask(tid_t tid);
 void      runtask(tid_t tid);
-void      stoptask(pid_t pid);
+void      stoptask(tid_t tid);
 
-pid_t     createprocess(u8 src, bool kerneltask);
+pid_t createprocess(u8 *src, bool kerneltask);
 void      deleteprocess(pid_t pid);
 void      runprocess(pid_t pid);
 void      stopprocess(pid_t pid);
@@ -206,7 +216,7 @@ void      stopprocess(pid_t pid);
 
 void      setpriority(pid_t pid,s8 priority);
 
-void      initprocesses();
+void      initprocesses(void);
 
 u32     iself(u8 * src);
 u32     loadelf(u8 * src, pid_t pid);
diff --git a/lib/handlers.c b/lib/handlers.c
index 49d610f..f32db15 100644
--- a/lib/handlers.c
+++ b/lib/handlers.c
@@ -139,7 +139,7 @@ __attribute__ ((noreturn)) void exception_handler(regs *dump)
 		case 14:
 			if (dump->cr2 >= USER_CODE && dump->cr2 < USER_STACK)
 			{
-				virtual_range_new(getcurrentprocess()->pdd,
+				virtual_range_new(findcurrentprocess()->pdd,
 						  (u8 *) (dump->cr2 & 0xFFFFF000),
 						  PAGESIZE, PAGE_ALL);
 			}
diff --git a/lib/makefile b/lib/makefile
index 68e0cd6..d3fd2b9 100755
--- a/lib/makefile
+++ b/lib/makefile
@@ -22,13 +22,13 @@ libs.o:$(OBJS) $(OBJASM)
 		$(ASM) $^
 
 handlers.o:handlers.c
-		$(CC) -mgeneral-regs-only $^
+		$(CC)  -mno-sse $^
 
 keyboard.o:keyboard.c
-		$(CC) -mgeneral-regs-only $^
+		$(CC)  -mno-sse $^
 
 mouse.o:mouse.c
-		$(CC) -mgeneral-regs-only $^
+		$(CC)  -mno-sse $^
 
 syscall.o:syscall.c
 		$(CC) -fomit-frame-pointer $^
diff --git a/lib/process.c b/lib/process.c
index 24da76e..916c4a5 100644
--- a/lib/process.c
+++ b/lib/process.c
@@ -8,7 +8,7 @@
 #include "gdt.h"
 
 process *processes;
-pid_t current;
+tid_t current;
 pid_t lastpid;
 
 
@@ -74,10 +74,10 @@ u32 iself(u8 * src)
 }
 END */
 
-void processexit()
+void processexit(void)
 {
-	deletetask(getcurrentpid());
-	switchtask(0, false);
+	deleteprocess(getcurrentpid());
+	switchtask(maketid(0,0));
 }
 
 /*******************************************************************************/
@@ -94,7 +94,7 @@ u32 loadelf(u8 * src, pid_t pid)
 
 	header = (elf32 *) src;
 	program = (elf32p *) (src + header->e_phoff);
-	code = elf_test(src);
+	code = iself(src);
 	if (code != 0)
 	{
 		printf("Erreur de chargement ELF, %s !\r\n",
@@ -142,31 +142,31 @@ u32 loadelf(u8 * src, pid_t pid)
 /*******************************************************************************/
 /* Initialise la liste des processus */
 
-void initprocesses()
+void initprocesses(void)
 {
 	u32     i = 1;
 	processes = (process *) vmalloc(sizeof(process) * MAXNUMPROCESS);
 	while (i < MAXNUMPROCESS)
 	{
 		processes[i].pid = NULL;
-		processes[i++].status = STATUS_FREE;
+		processes[i++].status = PROCESS_STATUS_FREE;
 	}
-	createtask(0,getinitretry());
+	createtask(0,getinitretry(),true);
 	processes[0].result = 0;
-	processes[0].status = STATUS_READY;
+	processes[0].status = PROCESS_STATUS_READY;
 	processes[0].iskernel = true;
-	current = 0;
+	current = maketid(0,0);
 	lastpid = NULL;
 }
 
 /*******************************************************************************/
 /* Récupère un emplacement dans la liste des processus */
 
-pid_t getfreepid()
+pid_t getfreepid(void)
 {
 	u32     i = lastpid;
 	u32     parsed = 0;
-	while (processes[++i].status != STATUS_FREE
+	while (processes[++i].status != PROCESS_STATUS_FREE
 	       && ++parsed < MAXNUMPROCESS)
 	{
 		if (i >= MAXNUMPROCESS)
@@ -181,13 +181,63 @@ pid_t getfreepid()
 }
 
 /*******************************************************************************/
-/* Récupère le PID du processus courant */
+/* Récupère un emplacement dans la liste des tâche du processus donné */
 
-pid_t getcurrentpid()
+tid_t getfreeptid(pid_t pid)
 {
-	return current->pid;
+	tid_t new;
+	new.pid=pid;
+	task_t *task_head= &processes[(u32)pid].task_head;
+	task *next;
+	TAILQ_FOREACH(next, task_head, tailq)
+		if (next->tid.number>new.number)
+			new.number=next->tid.number;
+	next->tid.number++;
+	return new;
 }
 
+/*******************************************************************************/
+/* Récupère le PID du processus courant */
+
+pid_t getcurrentpid(void)
+{
+	return current.pid;
+}
+
+/*******************************************************************************/
+/* Récupère le TID de la tâche courante */
+
+tid_t getcurrenttid(void)
+{
+	return current;
+}
+
+/*******************************************************************************/
+/* Change la tâche désigné dans le TID */
+
+tid_t	maketid(pid_t pid, u32 number)
+{
+	tid_t newtid;
+	newtid.pid=pid;
+	newtid.number=number;
+	return newtid;
+}
+
+/*******************************************************************************/
+/* Récupère l'adresse d'un processus */
+
+process* findprocess(pid_t pid)
+{
+	return &processes[(u32)pid];
+}
+
+/*******************************************************************************/
+/* Récupère l'adresse du processus courant */
+
+process* findcurrentprocess(void)
+{
+	return &processes[(u32)getcurrentpid()];
+}
 
 /*******************************************************************************/
 /* Determine le dernier PID occupé */
@@ -200,30 +250,55 @@ void usepid(pid_t pid)
 /*******************************************************************************/
 /* Bascule vers une tâche */
 
-void switchtask(tid_t pid, bool fromkernelmode)
+void switchtask(tid_t tid)
 {
-	pid_t previous = current;
-	current = &processes[(u32)pid];
-	if (!current->kernel)
-		setTSS(current->kstack.ss0, current->kstack.esp0);
+	tid_t previous = current;
+	task *atask = findtask(tid);
+	process *aprocess=findprocess(tid.pid);
+	if (!aprocess->iskernel)
+		setTSS(atask->kernel_stack.ss0, atask->kernel_stack.esp0);
 	else
 		setTSS(0x0, 0x0);
-	current->dump.eflags = (current->dump.eflags | 0x200) & 0xFFFFBFFF;
-	createdump(current->dump);
-	if (current->dump.cs==SEL_KERNEL_CODE)
+	atask->dump.eflags = (atask->dump.eflags | 0x200) & 0xFFFFBFFF;
+	createdump(atask->dump);
+	if (atask->dump.cs==SEL_KERNEL_CODE)
 		restcpu_kernel();
 	else
 		restcpu_user();
 	iret();
 }
 
+/*******************************************************************************/
+/* Cherche l'adresse d'une tâche */
+
+task* findtask(tid_t tid)
+{
+	task_t *task_head= &processes[(u32)tid.pid].task_head;
+	task *next;
+	TAILQ_FOREACH(next, task_head, tailq)
+		if (next->tid.number==tid.number)
+			return next;
+}
+
+/*******************************************************************************/
+/* Cherche l'adresse de la tâche courante */
+
+task* findcurrenttask(void)
+{
+	return findtask(getcurrenttid());
+}
+
+
 /*******************************************************************************/
 /* Détruit une tâche */
 
 void deletetask(tid_t tid)
 {
-	stoptask
-
+	stoptask(tid);
+	process* aprocess=findprocess(tid.pid);
+	task *atask=findtask(tid);
+	TAILQ_REMOVE(&aprocess->task_head, atask, tailq);
+	vfree(atask);
 }
 
 /*******************************************************************************/
@@ -231,87 +306,65 @@ void deletetask(tid_t tid)
 
 void runtask(tid_t tid)
 {
-	if (processes[(u32)pid].status == STATUS_READY)
+	task *atask=findtask(tid);
+	if (atask->status == TASK_STATUS_READY)
 	{
-		processes[(u32)pid].status = STATUS_RUN;
-		switchtask(u32)pid, false);
+		atask->status = TASK_STATUS_RUN;
+		switchtask(tid);
 	}
 }
 
 /*******************************************************************************/
 /* Initialise une tâche */
 
-tid_t createtask(pid_t pid,u8 *entry)
+tid_t createtask(pid_t pid,u8 *entry, bool kerneltask)
 {
-	pid_t previous = current;
-	pid_t pid = getfreepid();
-	usepid(pid);
-	page   *kstack;
-	processes[(u32)pid].pid = (u32)pid;
-	processes[(u32)pid].pdd = virtual_pd_create();
-	TAILQ_INIT(&processes[(u32)pid].page_head);
-	if (&processes[(u32)pid].iskernel)
+	tid_t tid;
+	tid.pid=pid;
+	process* aprocess=findprocess(pid);
+	task *new = (task *) vmalloc(sizeof(task));
+	TAILQ_INSERT_TAIL(&aprocess->task_head, new, tailq);
+	page *astack = virtual_page_getfree();
+	if (kerneltask)
 	{
-		processes[(u32)pid].dump.ss = SEL_KERNEL_STACK;
-		processes[(u32)pid].dump.esp =
-			(u32) kstack->vaddr + PAGESIZE - 16;
-		processes[(u32)pid].dump.eflags = 0x0;
-		processes[(u32)pid].dump.cs = SEL_KERNEL_CODE;
-		processes[(u32)pid].dump.eip = elf_load(code, pid);
-		if (processes[(u32)pid].dump.eip == NULL)
-			return NULL;
-		processes[(u32)pid].dump.ds = SEL_KERNEL_DATA;
-		processes[(u32)pid].dump.es = SEL_KERNEL_DATA;
-		processes[(u32)pid].dump.fs = SEL_KERNEL_DATA;
-		processes[(u32)pid].dump.gs = SEL_KERNEL_DATA;
-		processes[(u32)pid].dump.cr3 = KERNEL_PD_ADDR;
-		processes[(u32)pid].dump.eax = 0;
-		processes[(u32)pid].dump.ecx = 0;
-		processes[(u32)pid].dump.edx = 0;
-		processes[(u32)pid].dump.ebx = 0;
-		processes[(u32)pid].dump.ebp = 0;
-		processes[(u32)pid].dump.esi = 0;
-		processes[(u32)pid].dump.edi = 0;
-		processes[(u32)pid].result = 0;
-		processes[(u32)pid].status = STATUS_READY;
-		processes[(u32)pid].kernel = true;
-		current = previous;
+		new->dump.ss = SEL_KERNEL_STACK;
+		new->dump.esp =
+			(u32) astack->vaddr + PAGESIZE - 16;
+		new->dump.eflags = 0x0;
+		new->dump.cs = SEL_KERNEL_CODE;
+		new->dump.ds = SEL_KERNEL_DATA;
+		new->dump.es = SEL_KERNEL_DATA;
+		new->dump.fs = SEL_KERNEL_DATA;
+		new->dump.gs = SEL_KERNEL_DATA;
+		new->dump.cr3 = KERNEL_PD_ADDR;
 	}
 	else
 	{
-		current = &processes[(u32)pid];
-		setCR3(processes[(u32)pid].pdd->addr->paddr);
-		kstack = virtual_page_getfree();
-		processes[(u32)pid].dump.ss = SEL_USER_STACK | RPL_RING3;
-		processes[(u32)pid].dump.esp = USER_STACK - 16;
-		processes[(u32)pid].dump.eflags = 0x0;
-		processes[(u32)pid].dump.cs = SEL_USER_CODE | RPL_RING3;
-		processes[(u32)pid].dump.eip = elf_load(code, pid);
-		if (processes[(u32)pid].dump.eip == NULL)
-			return NULL;
-		processes[(u32)pid].dump.ds = SEL_USER_DATA | RPL_RING3;
-		processes[(u32)pid].dump.es = SEL_USER_DATA | RPL_RING3;
-		processes[(u32)pid].dump.fs = SEL_USER_DATA | RPL_RING3;
-		processes[(u32)pid].dump.gs = SEL_USER_DATA | RPL_RING3;
-		processes[(u32)pid].dump.cr3 =
-			(u32) processes[(u32)pid].pdd->addr->paddr;
-		processes[(u32)pid].kstack.ss0 = SEL_KERNEL_STACK;
-		processes[(u32)pid].kstack.esp0 =
-			(u32) kstack->vaddr + PAGESIZE - 16;
-		processes[(u32)pid].dump.eax = 0;
-		processes[(u32)pid].dump.ecx = 0;
-		processes[(u32)pid].dump.edx = 0;
-		processes[(u32)pid].dump.ebx = 0;
-		processes[(u32)pid].dump.ebp = 0;
-		processes[(u32)pid].dump.esi = 0;
-		processes[(u32)pid].dump.edi = 0;
-		processes[(u32)pid].result = 0;
-		processes[(u32)pid].status = STATUS_READY;
-		processes[(u32)pid].kernel = false;
-		current = previous;
-		setCR3(current->dump.cr3);
+		new->kernel_stack.ss0 = SEL_KERNEL_STACK;
+		new->kernel_stack.esp0 =
+			(u32) astack->vaddr + PAGESIZE - 16;
+		new->dump.ss = SEL_USER_STACK | RPL_RING3;
+		new->dump.esp = USER_STACK - 16;
+		new->dump.eflags = 0x0;
+		new->dump.cs = SEL_USER_CODE | RPL_RING3;
+		new->dump.ds = SEL_USER_DATA | RPL_RING3;
+		new->dump.es = SEL_USER_DATA | RPL_RING3;
+		new->dump.fs = SEL_USER_DATA | RPL_RING3;
+		new->dump.gs = SEL_USER_DATA | RPL_RING3;
+		new->dump.cr3 = aprocess->pdd->addr->paddr;
 	}
-	return pid;
+	new->tid=getfreeptid(pid);
+	new->dump.eip = aprocess->entry;
+	new->status=TASK_STATUS_READY;
+	new->dump.eax = 0;
+	new->dump.ecx = 0;
+	new->dump.edx = 0;
+	new->dump.ebx = 0;
+	new->dump.ebp = 0;
+	new->dump.esi = 0;
+	new->dump.edi = 0;
+	new->status = TASK_STATUS_READY;
+	return new->tid;
 }
 
 /*******************************************************************************/
@@ -319,7 +372,8 @@ tid_t createtask(pid_t pid,u8 *entry)
 
 void stoptask(tid_t tid)
 {
-
+	task *current=findtask(tid);
+	current->status=TASK_STATUS_STOP;
 }
 
 /*******************************************************************************/
@@ -327,69 +381,22 @@ void stoptask(tid_t tid)
 
 pid_t createprocess(u8 *src, bool kerneltask)
 {
-	pid_t previous = current;
-	pid_t pid = getfreepid();
-	usepid(pid);
-	page   *kstack;
-	processes[(u32)pid].pid = (u32)pid;
-	processes[(u32)pid].pdd = virtual_pd_create();
-	TAILQ_INIT(&processes[(u32)pid].page_head);
-	processes[(u32)pid].entry = elf_load(code, pid);
-		
-if (processes[(u32)pid].dump.eip == NULL)
-			return NULL;
-		processes[(u32)pid].dump.ds = SEL_KERNEL_DATA;
-		processes[(u32)pid].dump.es = SEL_KERNEL_DATA;
-		processes[(u32)pid].dump.fs = SEL_KERNEL_DATA;
-		processes[(u32)pid].dump.gs = SEL_KERNEL_DATA;
-		processes[(u32)pid].dump.cr3 = KERNEL_PD_ADDR;
-		processes[(u32)pid].dump.eax = 0;
-		processes[(u32)pid].dump.ecx = 0;
-		processes[(u32)pid].dump.edx = 0;
-		processes[(u32)pid].dump.ebx = 0;
-		processes[(u32)pid].dump.ebp = 0;
-		processes[(u32)pid].dump.esi = 0;
-		processes[(u32)pid].dump.edi = 0;
-		processes[(u32)pid].result = 0;
-		processes[(u32)pid].status = STATUS_READY;
-		processes[(u32)pid].kernel = true;
-		current = previous;
-	}
-	else
-	{
-		current = &processes[(u32)pid];
-		setCR3(processes[(u32)pid].pdd->addr->paddr);
-		kstack = virtual_page_getfree();
-		processes[(u32)pid].dump.ss = SEL_USER_STACK | RPL_RING3;
-		processes[(u32)pid].dump.esp = USER_STACK - 16;
-		processes[(u32)pid].dump.eflags = 0x0;
-		processes[(u32)pid].dump.cs = SEL_USER_CODE | RPL_RING3;
-		processes[(u32)pid].dump.eip = elf_load(code, pid);
-		if (processes[(u32)pid].dump.eip == NULL)
-			return NULL;
-		processes[(u32)pid].dump.ds = SEL_USER_DATA | RPL_RING3;
-		processes[(u32)pid].dump.es = SEL_USER_DATA | RPL_RING3;
-		processes[(u32)pid].dump.fs = SEL_USER_DATA | RPL_RING3;
-		processes[(u32)pid].dump.gs = SEL_USER_DATA | RPL_RING3;
-		processes[(u32)pid].dump.cr3 =
-			(u32) processes[(u32)pid].pdd->addr->paddr;
-		processes[(u32)pid].kstack.ss0 = SEL_KERNEL_STACK;
-		processes[(u32)pid].kstack.esp0 =
-			(u32) kstack->vaddr + PAGESIZE - 16;
-		processes[(u32)pid].dump.eax = 0;
-		processes[(u32)pid].dump.ecx = 0;
-		processes[(u32)pid].dump.edx = 0;
-		processes[(u32)pid].dump.ebx = 0;
-		processes[(u32)pid].dump.ebp = 0;
-		processes[(u32)pid].dump.esi = 0;
-		processes[(u32)pid].dump.edi = 0;
-		processes[(u32)pid].result = 0;
-		processes[(u32)pid].status = STATUS_READY;
-		processes[(u32)pid].kernel = false;
-		current = previous;
-		setCR3(current->dump.cr3);
-	}
-	return pid;
+	tid_t previous = current;
+	current.pid = getfreepid();
+	current.number = 0;
+	usepid(current.pid);
+	process* new=findcurrentprocess();
+	new->pid = current.pid;
+	new->pdd = virtual_pd_create();
+	TAILQ_INIT(&new->page_head);
+	new->iskernel=kerneltask;
+	setCR3(new->pdd->addr->paddr);
+	new->entry = loadelf(src, new->pid);
+	createtask(new->pid,new->entry, new->iskernel);
+	current = previous;
+	process* old=findcurrentprocess();
+	setCR3(old->pdd->addr->paddr);
+	return new->pid;
 }
 
 /*******************************************************************************/
@@ -397,7 +404,13 @@ if (processes[(u32)pid].dump.eip == NULL)
 
 void deleteprocess(pid_t pid)
 {
-
+	stopprocess(pid);
+	process* aprocess=findprocess(pid);
+	task *next;
+	TAILQ_FOREACH(next, &aprocess->task_head, tailq)
+		deletetask(next->tid);
+	aprocess->status = PROCESS_STATUS_FREE;
+	
 }
 
 /*******************************************************************************/
@@ -405,7 +418,15 @@ void deleteprocess(pid_t pid)
 
 void runprocess(pid_t pid)
 {
-
+	process* aprocess=findprocess(pid);
+	if (aprocess->status == PROCESS_STATUS_READY)
+	{
+		aprocess->status = PROCESS_STATUS_RUN;
+		tid_t tid=maketid(pid,0);
+		task *atask=findtask(tid);
+		atask->status=TASK_STATUS_RUN;
+		switchtask(tid);
+	}
 }
 
 /*******************************************************************************/
@@ -413,7 +434,14 @@ void runprocess(pid_t pid)
 
 void stopprocess(pid_t pid)
 {
-
+	process* aprocess=findprocess(pid);
+	if (aprocess->status == PROCESS_STATUS_RUN)
+	{
+		aprocess->status = PROCESS_STATUS_READY;
+		task *next;
+		TAILQ_FOREACH(next, &aprocess->task_head, tailq)
+		next->status=TASK_STATUS_READY;
+	}
 }
 
 /*******************************************************************************/
diff --git a/lib/shell.c b/lib/shell.c
index 28efe85..b3674e7 100644
--- a/lib/shell.c
+++ b/lib/shell.c
@@ -19,6 +19,7 @@
 #include "3D/man.c"
 #include "memory.h"
 #include "syscall.h"
+#include "process.h"
 
 static command commands[] = {
 	{"reboot", "", &rebootnow},
@@ -95,8 +96,8 @@ int test(void)
 int testtask()
 {
 	print("*** Creation d'une tache\r\n");
-	u32     pid = task_create(&programs_test, false);
-	task_run(pid);
+	pid_t pid = createprocess(&programs_test, false);
+	runprocess(pid);
 }
 
 /*******************************************************************************/
diff --git a/lib/syscall.c b/lib/syscall.c
index 5acaf69..fbc96e3 100644
--- a/lib/syscall.c
+++ b/lib/syscall.c
@@ -62,20 +62,20 @@ __attribute__ ((noreturn)) void sysenter_handler(regs *dump)
 	sti();
 	switch (dump->eax)
 	{
-     		case 4:
-			dump->eax=(u32) gettimer();
-			break;
-     		case 5:
-			exit(dump->ebx);
-			break;
      		case 2:
 			dump->eax=(u32) print(dump->ebx);
 			break;
+     		case 0:
+			dump->eax=(u32) testapi(dump->ebx, dump->esi, dump->edi, dump);
+			break;
+     		case 4:
+			dump->eax=(u32) gettimer();
+			break;
      		case 1:
 			dump->eax=(u32) waitascii();
 			break;
-     		case 0:
-			dump->eax=(u32) testapi(dump->ebx, dump->esi, dump->edi, dump);
+     		case 5:
+			processexit(dump->ebx);
 			break;
 
 		default:
diff --git a/programs/include/libsys.h b/programs/include/libsys.h
index 1f6bcf6..9f68378 100644
--- a/programs/include/libsys.h
+++ b/programs/include/libsys.h
@@ -4,8 +4,8 @@
 
 #include "types.h";
 
-u32 getticks(void);
-void exit(u32 resultcode);
-u8 waitkey(void);
 u32 testapi(u32 arg1, u32 arg2, u32 arg3);
+u32 getticks(void);
+u8 waitkey(void);
+void exit(u32 resultcode);
 
diff --git a/programs/lib/libsys.c b/programs/lib/libsys.c
index 362745c..6ba6c83 100644
--- a/programs/lib/libsys.c
+++ b/programs/lib/libsys.c
@@ -6,25 +6,25 @@
 #include "syscall.h";
 #include "types.h";
 
+u32 testapi(u32 arg1, u32 arg2, u32 arg3)
+{
+	return syscall3(0,(u32) arg1,(u32) arg2,(u32) arg3);
+}
+
 u32 getticks(void)
 {
 	return syscall0(4);
 }
 
+u8 waitkey(void)
+{
+	return syscall0(1);
+}
+
 void exit(u32 resultcode)
 {
 	syscall1(5,(u32) resultcode);
 	return;
 }
 
-u8 waitkey(void)
-{
-	return syscall0(1);
-}
-
-u32 testapi(u32 arg1, u32 arg2, u32 arg3)
-{
-	return syscall3(0,(u32) arg1,(u32) arg2,(u32) arg3);
-}
-
 
diff --git a/syscalls.txt b/syscalls.txt
index e7aa728..fdf2395 100644
--- a/syscalls.txt
+++ b/syscalls.txt
@@ -1,29 +1,5 @@
 [
 {
-"ID":4, 
-"NAME":"getticks",
-"LIBRARY":"libsys",
-"INTERNALNAME":"gettimer",
-"DESCRIPTION":"Return the internal value of the timer",
-"ARGS": [],
-"RETURN":"u32"
-}
-
-,
-{
-"ID":5,
-"LIBRARY":"libsys",
-"NAME":"exit",
-"INTERNALNAME":"exit",
-"DESCRIPTION":"End a task for user or kernel domain",
-"ARGS": [
-{"TYPE":"u32","NAME":"resultcode","DESCRIPTION":"Code result of the execution"}
-],
-"RETURN":"void"
-}
-
-,
-{
 "ID":2,
 "LIBRARY":"libvideo",
 "NAME":"print",
@@ -35,17 +11,6 @@
 "RETURN":"u32"
 }
 
-,
-{
-"ID":1,
-"LIBRARY":"libsys",
-"NAME":"waitkey",
-"INTERNALNAME":"waitascii",
-"DESCRIPTION":"Wait for user to press a key and return the ascii code pressed",
-"ARGS": [],
-"RETURN":"u8"
-}
-
 ,
 {
 "ID":0,
@@ -62,4 +27,39 @@
 "DUMP":"yes"
 }
 
+,
+{
+"ID":4, 
+"NAME":"getticks",
+"LIBRARY":"libsys",
+"INTERNALNAME":"gettimer",
+"DESCRIPTION":"Return the internal value of the timer",
+"ARGS": [],
+"RETURN":"u32"
+}
+
+,
+{
+"ID":1,
+"LIBRARY":"libsys",
+"NAME":"waitkey",
+"INTERNALNAME":"waitascii",
+"DESCRIPTION":"Wait for user to press a key and return the ascii code pressed",
+"ARGS": [],
+"RETURN":"u8"
+}
+
+,
+{
+"ID":5,
+"LIBRARY":"libsys",
+"NAME":"exit",
+"INTERNALNAME":"processexit",
+"DESCRIPTION":"End a task for user or kernel domain",
+"ARGS": [
+{"TYPE":"u32","NAME":"resultcode","DESCRIPTION":"Code result of the execution"}
+],
+"RETURN":"void"
+}
+
 ]
\ No newline at end of file
diff --git a/system/system.c b/system/system.c
index 768bf8b..dab3c5e 100644
--- a/system/system.c
+++ b/system/system.c
@@ -68,7 +68,7 @@ int main(u32 magic, u32 addr)
 	print("\033[37m\033[0m -Initilisation des processus");
 	inittr();
 	initretry(&&retry);
-	task_init();
+	initprocesses();
 	initsyscall();
 	ok();