chipcon_cexit.s51

Zigbee2006入门（源代码+文档讲解+系统推荐）

/******************************************************************************
*                                                                             *
*        **********                                                           *
*       ************                                                          *
*      ***        ***                                                         *
*     ***    ++    ***                                                        *
*     ***   +  +   ***                      CHIPCON                           *
*     ***   +                                                                 *
*     ***   +  +   ***                                                        *
*     ***    ++    ***                                                        *
*      ***        ***                                                         *
*       ************                                                          *
*        **********                                                           *
*                                                                             *
*******************************************************************************

Filename:     chipcon_cexit.s51
Author:
Revised:      28/11-2005
Revision:     1.0

Description:
System termination code for the 8051 IAR Systems C/EC++ Compiler.

Include this file in the project and add $TOOLKIT_DIR$\SRC\LIB\ to
the assembler include path.

Copyright 2004-2005 IAR Systems. All rights reserved.

******************************************************************************/

;
; Naming covention of labels in this file:
;
;  ?xxx	  - External labels only accessed from assembler.
;  __xxx   - External labels accessed from or defined in C.
;  xxx	  - Labels local to one module (note: this file contains
;           several modules).
;  main	  - The starting point of the user program.
;

#define XRSEGCSTART RSEG CSTART:CODE:NOROOT
#include "iar_common.h"

	     EXTERNS_FOR_ALL_DPTR_SYMBOLS()

#if (defined(__DLIB_BUILD__) )


//------------------------------------------------------------------------
//
// DLIB exit sequence
//

// ---------------------------------------------------------
// The exit system
//
// The default exit function, written in C, calls _exit provided
// below.  This function performs system cleanup and calls __exit that
// halts the system.
//

// -----------------------------------------------
// _exit -- Perform system cleanup and jump to __exit.
//
// The module below contains a number of segment parts that is
// included in the final application only if they are needed.
//

   XRSEGCSTART
   MODULE    ?cexit
   PUBLIC    _exit
   FUNCTION  _exit,0203H
   EXTERN    __exit
   REQUIRE   __exit
   REQUIRE   ?exit_br_xxexit

_exit:

// -------------------------------------
// Segment part included if the argument to exit must be saved and
// later restored.

   XRSEGCSTART
   REQUIRE ?exit_restore

?exit_save:
   MOV     A,R2
   MOV     R6,A
   MOV     A,R3
   MOV     R7,A


// -------------------------------------
// Segment part included if destructors must be called.

   XRSEGCSTART
   PUBLIC  __cstart_call_dtors
   EXTERN  __call_dtors
   REQUIRE ?exit_save

   // This label is required by "__record_needed_destruction".
__cstart_call_dtors:
#if (__CODE_MODEL__ == __CM_BANKED__)
   EXTERN  ?BCALL

   MOV     DPL,#low(__call_dtors)
   MOV     DPH,#high(__call_dtors)
#ifdef __EXTENDED_DPTR__
   MOV     ?DPX,#0
#endif
   MOV     A,#BYTE3(__call_dtors)
   LCALL   ?BCALL
#else
   LCALL   __call_dtors
#endif


// -------------------------------------
// Segment part included if DLib standard IO is used.

   XRSEGCSTART
   PUBLIC  __cstart_closeall
   REQUIRE ?exit_save

   // This label is required by DLib.
__cstart_closeall:
   EXTERN  _Close_all
#if (__CODE_MODEL__ == __CM_BANKED__)
   EXTERN  ?BCALL

   MOV     DPL,#low(_Close_all)
   MOV     DPH,#high(_Close_all)
#ifdef __EXTENDED_DPTR__
   MOV     ?DPX,#0
#endif
   MOV     A,#BYTE3(_Close_all)
   LCALL   ?BCALL
#else
   LCALL   _Close_all
#endif


// -------------------------------------
// Restore the argument previously stored by the "save" section above.

   XRSEGCSTART

?exit_restore:
   MOV     A,R6
   MOV     R2,A
   MOV     A,R7
   MOV     R3,A

   XRSEGCSTART

   // Jump to __exit.
?exit_br_xxexit:

#if (__CODE_MODEL__ == __CM_BANKED__)
   EXTERN  ?BCALL

   MOV     DPL,#low(__exit)
   MOV     DPH,#high(__exit)
#ifdef __EXTENDED_DPTR__
   MOV     ?DPX,#0
#endif
   MOV     A,#BYTE3(__exit)
   LCALL   ?BCALL
#else
   LJMP     __exit         // __exit will not return
#endif

   ENDMOD

   END


#else // __CLIB_BUILD__


//------------------------------------------------------------------------
//
// CLIB exit(int code)
//
//------------------------------------------------------------------------

   MODULE   ?cexit

   PUBLIC   exit
   // PUBLIC   ?C_EXIT
   XRSEGCSTART
	FUNCTION exit,0203H

exit:
   // ?C_EXIT:
   PUBLIC  ?ROM_MONITOR_NOPS

?ROM_MONITOR_NOPS:
   NOP                     ; Three NOPs for ROM-Monitor breaks.
   NOP
   NOP

   SJMP    exit
	
   ENDMOD

   END
#endif