Pass top of stack to configINIT_TLS_BLOCK

Picolibc wants to allocate the per-task TLS block within the stack
segment, so it will need to modify the top of stack value. Pass the
pxTopOfStack variable to make this explicit.

Signed-off-by: Keith Packard <keithpac@amazon.com>

Author: Keith Packard

include/FreeRTOS.h

@@ -113,7 +113,7 @@
     #endif
 
     #ifndef configINIT_TLS_BLOCK
-        #define configINIT_TLS_BLOCK( xTLSBlock )    _REENT_INIT_PTR( &( xTLSBlock ) )
+        #define configINIT_TLS_BLOCK( xTLSBlock, pxTopOfStack )    _REENT_INIT_PTR( &( xTLSBlock ) )
     #endif
 
     #ifndef configSET_TLS_BLOCK

tasks.c

@@ -958,7 +958,7 @@ static void prvInitialiseNewTask( TaskFunction_t pxTaskCode,
     #if ( ( configUSE_NEWLIB_REENTRANT == 1 ) || ( configUSE_C_RUNTIME_TLS_SUPPORT == 1 ) )
     {
         /* Allocate and initialize memory for the task's TLS Block. */
-        configINIT_TLS_BLOCK( pxNewTCB->xTLSBlock );
+        configINIT_TLS_BLOCK( pxNewTCB->xTLSBlock, pxTopOfStack );
     }
     #endif