diff --git a/include/shell.h b/include/shell.h
index e983d98..4219f15 100644
--- a/include/shell.h
+++ b/include/shell.h
@@ -30,3 +30,4 @@ int logo();
 int detectpci();
 int mem();
 int testmem();
+int testsyscall();
diff --git a/include/syscall.h b/include/syscall.h
index 04f53ae..4910067 100644
--- a/include/syscall.h
+++ b/include/syscall.h
@@ -1,5 +1,79 @@
 /*******************************************************************************/
 /* COS2000 - Compatible Operating System - LGPL v3 - Hordé Nicolas             */
 /*                                                                             */
+
+#define sysexit \
+ asm volatile ("sysexit"::"c");
+
+
+static inline long syscall(long syscall) {
+long ret;
+asm volatile (
+"mov %%esp,%%ecx;\
+mov $1f,%%edx;\
+sysenter;\
+1:" : "=a" (ret) : "a" (syscall): "ecx","edx","memory");
+return ret;
+}
+
+static inline long syscall1(long syscall, long arg1) {
+long ret;
+asm volatile (
+"mov %%esp,%%ecx;\
+mov $1f,%%edx;\
+sysenter;\
+1:" : "=a" (ret) : "a" (syscall), "b" (arg1) : "ecx","edx","memory");
+return ret;
+}
+
+static inline long syscall2(long syscall, long arg1, long arg2) {
+long ret;
+asm volatile (
+"mov %%esp,%%ecx;\
+mov $1f,%%edx;\
+sysenter;\
+1:" : "=a" (ret) : "a" (syscall), "b" (arg1), "S" (arg2) : "ecx","edx","memory");
+return ret;
+}
+
+static inline long syscall3(long syscall, long arg1, long arg2, long arg3) {
+long ret;
+asm volatile (
+"mov %%esp,%%ecx;\
+mov $1f,%%edx;\
+sysenter;\
+1:" : "=a" (ret) : "a" (syscall), "b" (arg1), "S" (arg2), "D" (arg3) : "ecx","edx","memory");
+return ret;
+}
+
+/*static inline long syscall4(long syscall, long arg1, long arg2, long arg3, long arg4) {
+long ret;
+asm volatile ("mov %%esp,%%ecx;
+"mov $1f,%%edx;
+"sysenter;
+1:" : "=a" (ret) : "a" (syscall), "b" (arg1), "c" (arg2), 
+"d" (arg3), "S" (arg4) : “memory”);
+return ret;
+}
+
+static inline long syscall5(long syscall, long arg1, long arg2, long arg3, long arg4, long arg5) {
+long ret;
+asm volatile ("mov %%esp,%%ecx;
+"mov $1f,%%edx;
+"sysenter;
+1:" : "=a" (ret) : "a" (syscall), "b" (arg1), "c" (arg2), 
+"d" (arg3), "S" (arg4), "D" (arg5) : “memory”);
+return ret;
+}
+
+static inline long syscall6(long syscall, long arg1, long arg2, long arg3, long arg4, long arg5, long arg6) {
+long ret;
+asm volatile ("mov %%esp,%%ecx;
+"mov $1f,%%edx;
+"sysenter;
+1:" : "=a" (ret) : "a" (syscall), "b" (arg1), "c" (arg2), 
+"d" (arg3), "S" (arg4), "D", (arg5), "d" (arg6) : “memory”);
+return ret;
+}*/
 void initsyscall(void);
 void sysenter_handler(void);
diff --git a/lib/shell.c b/lib/shell.c
index 2e98678..ccc30a2 100644
--- a/lib/shell.c
+++ b/lib/shell.c
@@ -18,6 +18,7 @@
 #include "3D/sphere.c"
 #include "3D/man.c"
 #include "memory.h"
+#include "syscall.h"
 
 static command commands[] = {
 	{"reboot"    , "", &rebootnow},
@@ -42,7 +43,7 @@ static command commands[] = {
 	{"detectpci"      , "", &detectpci},
 	{"mem"      , "", &mem},
 	{"testmem"      , "", &testmem},
-
+    {"testsyscall"      , "", &testsyscall},
 };
 
 /*******************************************************************************/
@@ -82,6 +83,15 @@ int test(void)
     return;
 }
 
+/*******************************************************************************/
+/* Test l'usage de syscall */
+int testsyscall()
+{
+    print("*** avant appel");
+    syscall2(0x0, 0x1980, 0x2505);
+    print("*** apres appel");
+}
+
 /*******************************************************************************/
 /* Test la memoire */
 int testmem()