Changeset 457 for trunk/hal/generic/hal_context.h

Timestamp:

Aug 2, 2018, 11:47:13 AM (6 years ago)

Author:

alain

Message:

This version modifies the exec syscall and fixes a large number of small bugs.
The version number has been updated (0.1)

File:

• trunk/hal/generic/hal_context.h (modified) (4 diffs)

trunk/hal/generic/hal_context.h

@@ -43 +43 @@
  * identified by the <thread> argument. The context is not initialised.
  ****************************************************************************************
+ * @ thread  : pointer on the thread descriptor.
  * @ return 0 if success / return -1 if failure.
  ***************************************************************************************/
@@ -48 +49 @@
 
 /****************************************************************************************
- * This function allocates memory for a CPU context, initialize it from scratch,
- * and links it to the thread identified by the <thread> argument.
+ * This function initializes a CPU context from scratch.
  ****************************************************************************************
  * @ thread  : pointer on the thread descriptor.
- * @ return 0 if success / return -1 if failure.
  ***************************************************************************************/
-error_t hal_cpu_context_create( struct thread_s * thread );
+void hal_cpu_context_init( struct thread_s * thread );
 
 /****************************************************************************************
@@ -71 +70 @@
 
 /****************************************************************************************
+ * This function is used to implement the exec() system call. 
+ * 1) It initialize the relevant slots of the the calling thread CPU context.
+ * 2) It call the hal_do_cpu_restore() function to return to user mode and start
+ *    execution of the new process.
+ ****************************************************************************************
+ * @ thread  : pointer on the thread descriptor.
+ ***************************************************************************************/
+void hal_cpu_context_exec( struct thread_s * thread );
+
+/****************************************************************************************
  * This function display some slots of the CPU context.
- * - For the MIPS32 :
- *   . GPR : gp_28 , sp_29 , ra_31
- *   . CP0 : c0_sr , c0_th , c0_epc
- *   . CP2 : c2_ptpr , c2-mode
- * - For X86 TODO :
  ****************************************************************************************
  * @ thread_xp  : extended pointer on the thread descriptor.
@@ -103 +107 @@
  ***************************************************************************************/
 error_t hal_fpu_context_alloc( struct thread_s * thread );
+
+/****************************************************************************************
+ * This function initializes a FPU context from scratch.
+ ****************************************************************************************
+ * @ thread  : pointer on the thread descriptor.
+ ***************************************************************************************/
+void hal_fpu_context_init( struct thread_s * thread );
 
 /****************************************************************************************