The application space size returned from OS_ChangeEnvironment includes the...

The application space size returned from OS_ChangeEnvironment includes the &8000 below the application slot, and our Message_MemoryMoved handler wasn't taking account of this, hence the way module tasks randomly acquired 32K wimpslots in the Task Manager! Also updates appslotsize variable on task switches, to remove some false positives.

Version 4.79. Not tagged

s/Wimp08s

@@ -228,6 +228,7 @@ servicememorymoved
         MOV     R1,#0
         SWI     XOS_ChangeEnvironment
         LDR     R0,appspacesize
+        SUB     R1,R1,#ApplicationStart
         TEQ     R1,R0
         Pull    "R0-R6,PC", EQ
         LDR     R0,slotsize
@@ -1120,6 +1121,10 @@ mapslotin       ROUT
         LDR     R14,taskhandle
         LDR     R4,[wsptr,R14]          ; NB task cannot be dead
         ADD     R4,R4,#task_environment
+;
+        LDR     R14,[R4,#12*ApplicationSpaceSize]
+        SUB     R14,R14,#ApplicationStart
+        STR     R14,appspacesize
 ;
         MOV     R0,#0                   ; handler number
 01