Fix free secure context for Cortex-M23 ports

Update the branching condition to correctly free secure context when
there is one.

Signed-off-by: Gaurav Aggarwal <aggarg@amazon.com>

Author: aggarg

portable/ARMv8M/non_secure/portable/GCC/ARM_CM23/portasm.c

@@ -449,7 +449,7 @@ void vPortFreeSecureContext( uint32_t * pulTCB ) /* __attribute__ (( naked )) PR
         "	ldr r2, [r0]									\n"/* The first item in the TCB is the top of the stack. */
         "	ldr r1, [r2]									\n"/* The first item on the stack is the task's xSecureContext. */
         "	cmp r1, #0										\n"/* Raise svc if task's xSecureContext is not NULL. */
-        "	beq free_secure_context							\n"
+        "	bne free_secure_context							\n"/* Branch if r1 != 0. */
         "	bx lr											\n"/* There is no secure context (xSecureContext is NULL). */
         " free_secure_context:								\n"
         "	svc %0											\n"/* Secure context is freed in the supervisor call. */

portable/ARMv8M/non_secure/portable/IAR/ARM_CM23/portasm.s

@@ -381,7 +381,7 @@ vPortFreeSecureContext:
 	ldr r2, [r0]							/* The first item in the TCB is the top of the stack. */
 	ldr r1, [r2]							/* The first item on the stack is the task's xSecureContext. */
 	cmp r1, #0								/* Raise svc if task's xSecureContext is not NULL. */
-	beq free_secure_context
+	bne free_secure_context					/* Branch if r1 != 0. */
 	bx lr									/* There is no secure context (xSecureContext is NULL). */
 	free_secure_context:
 		svc 1								/* Secure context is freed in the supervisor call. portSVC_FREE_SECURE_CONTEXT = 1. */

portable/GCC/ARM_CM23/non_secure/portasm.c

@@ -449,7 +449,7 @@ void vPortFreeSecureContext( uint32_t * pulTCB ) /* __attribute__ (( naked )) PR
         "	ldr r2, [r0]									\n"/* The first item in the TCB is the top of the stack. */
         "	ldr r1, [r2]									\n"/* The first item on the stack is the task's xSecureContext. */
         "	cmp r1, #0										\n"/* Raise svc if task's xSecureContext is not NULL. */
-        "	beq free_secure_context							\n"
+        "	bne free_secure_context							\n"/* Branch if r1 != 0. */
         "	bx lr											\n"/* There is no secure context (xSecureContext is NULL). */
         " free_secure_context:								\n"
         "	svc %0											\n"/* Secure context is freed in the supervisor call. */

portable/IAR/ARM_CM23/non_secure/portasm.s

@@ -381,7 +381,7 @@ vPortFreeSecureContext:
 	ldr r2, [r0]							/* The first item in the TCB is the top of the stack. */
 	ldr r1, [r2]							/* The first item on the stack is the task's xSecureContext. */
 	cmp r1, #0								/* Raise svc if task's xSecureContext is not NULL. */
-	beq free_secure_context
+	bne free_secure_context					/* Branch if r1 != 0. */
 	bx lr									/* There is no secure context (xSecureContext is NULL). */
 	free_secure_context:
 		svc 1								/* Secure context is freed in the supervisor call. portSVC_FREE_SECURE_CONTEXT = 1. */

tasks.c

@@ -1219,7 +1219,6 @@ static void prvAddNewTaskToReadyList( TCB_t * pxNewTCB )
             {
                 --uxCurrentNumberOfTasks;
                 traceTASK_DELETE( pxTCB );
-                prvDeleteTCB( pxTCB );
 
                 /* Reset the next expected unblock time in case it referred to
                  * the task that has just been deleted. */
@@ -1228,6 +1227,14 @@ static void prvAddNewTaskToReadyList( TCB_t * pxNewTCB )
         }
         taskEXIT_CRITICAL();
 
+        /* If the task is not deleting itself, call prvDeleteTCB from outside of
+         * critical section. If a task deletes itself, prvDeleteTCB is called
+         * from prvCheckTasksWaitingTermination which is called from Idle task. */
+        if( pxTCB != pxCurrentTCB )
+        {
+            prvDeleteTCB( pxTCB );
+        }
+
         /* Force a reschedule if it is the currently running task that has just
          * been deleted. */
         if( xSchedulerRunning != pdFALSE )