feat: using stack with offset through value stored and loaded from R1

assembleur.s

@@ -22,12 +22,11 @@ switch_to_user_mode:
 // R0: user_starting_address
 /*************************/
 change_ret:
-	ldr r1, =user_stack
-	//mrs r1, PSP
-	//str r0, [r1, #76]
+	mrs r1, PSP
+	ldr r1, [r1]
 	str r0, [r1, #24]
 	msr PSP, r1
-	bx lr
+	bx 	lr
 
 .equ bad_addr,0x90000
 

mpu_user_console_etu.c

@@ -120,7 +120,7 @@ int main(void) {
 	switch_to_user_mode();					// to be implemented
 
 	// testing memory accesses in user mode:
-	//test_user_mode();		// to be removed after checking
+	test_user_mode();		// to be removed after checking
 
 	while (1) {
 		exec_user_read_write();