Fix AVR build, Add hooks for kernel threads

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3477 42af7a65-404d-4744-a932-0658087f49c3

arch/avr/src/Makefile

@@ -108,11 +108,6 @@ nuttx: $(HEAD_AOBJ) board/libboard$(LIBEXT)
 	@echo "LD: nuttx"
 	@$(LD) --entry=__start $(LDFLAGS) $(LIBPATHS) -o $(NUTTX)$(EXEEXT) $(HEAD_AOBJ) $(EXTRA_OBJS) \
 		--start-group $(LDLIBS) -lboard --end-group $(EXTRA_LIBS) $(LIBGCC)
-ifeq ($(CONFIG_BOOT_RUNFROMFLASH),y)
-	@export flashloc=`$(OBJDUMP) --all-headers $(NUTTX)$(EXEEXT) | grep _eronly | cut -d' ' -f1`;  \
-	$(OBJCOPY) $(OBJCOPYARGS) --adjust-section-vma=.data=0x$$flashloc $(NUTTX)$(EXEEXT) $(NUTTX).flashimage
-	@mv $(NUTTX).flashimage $(NUTTX)$(EXEEXT)
-endif
 	@$(NM) $(NUTTX)$(EXEEXT) | \
 	grep -v '\(compiled\)\|\(\$(OBJEXT)$$\)\|\( [aUw] \)\|\(\.\.ng$$\)\|\(LASH[RL]DI\)' | \
 	sort > $(TOPDIR)/System.map

arch/hc/src/common/up_doirq.c

@@ -101,7 +101,7 @@ uint8_t *up_doirq(int irq, uint8_t *regs)
    * switch occurred during interrupt processing.
    */
 
-  regs = current_regs;
+  regs = (uint8_t*)current_regs;
 
   /* Restore the previous value of current_regs.  NULL would indicate that
    * we are no longer in an interrupt handler.  It will be non-NULL if we

arch/hc/src/common/up_internal.h

@@ -101,7 +101,7 @@ typedef void (*up_vector_t)(void);
  * structure.  If is non-NULL only during interrupt processing.
  */
 
-extern uint8_t *current_regs;
+extern volatile uint8_t *current_regs;
 
 /* This is the beginning of heap as provided from processor-specific logic.
  * This is the first address in RAM after the loaded program+bss+idle stack.