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[/] [openrisc/] [trunk/] [gnu-old/] [newlib-1.17.0/] [libgloss/] [m68hc11/] [crt0.S] - Diff between revs 158 and 816

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Rev 158 Rev 816
/* Startup code for M68HC11/M68HC12.
/* Startup code for M68HC11/M68HC12.
 * Copyright (C) 1999, 2000, 2001, 2002 Stephane Carrez (stcarrez@nerim.fr)
 * Copyright (C) 1999, 2000, 2001, 2002 Stephane Carrez (stcarrez@nerim.fr)
 *
 *
 * The authors hereby grant permission to use, copy, modify, distribute,
 * The authors hereby grant permission to use, copy, modify, distribute,
 * and license this software and its documentation for any purpose, provided
 * and license this software and its documentation for any purpose, provided
 * that existing copyright notices are retained in all copies and that this
 * that existing copyright notices are retained in all copies and that this
 * notice is included verbatim in any distributions. No written agreement,
 * notice is included verbatim in any distributions. No written agreement,
 * license, or royalty fee is required for any of the authorized uses.
 * license, or royalty fee is required for any of the authorized uses.
 * Modifications to this software may be copyrighted by their authors
 * Modifications to this software may be copyrighted by their authors
 * and need not follow the licensing terms described here, provided that
 * and need not follow the licensing terms described here, provided that
 * the new terms are clearly indicated on the first page of each file where
 * the new terms are clearly indicated on the first page of each file where
 * they apply.
 * they apply.
 */
 */
;-----------------------------------------
;-----------------------------------------
; startup code
; startup code
;-----------------------------------------
;-----------------------------------------
        .file   "crt0.s"
        .file   "crt0.s"
;;
;;
;;
;;
;; The linker concatenate the .install* sections in the following order:
;; The linker concatenate the .install* sections in the following order:
;;
;;
;; .install0    Setup the stack pointer
;; .install0    Setup the stack pointer
;; .install1    Place holder for applications
;; .install1    Place holder for applications
;; .install2    Optional installation of data section in memory
;; .install2    Optional installation of data section in memory
;; .install3    Place holder for applications
;; .install3    Place holder for applications
;; .install4    Invokes the main
;; .install4    Invokes the main
;;
;;
        .sect   .install0,"ax",@progbits
        .sect   .install0,"ax",@progbits
        .globl _start
        .globl _start
_start:
_start:
;;
;;
;; At this step, the stack is not initialized and interrupts are masked.
;; At this step, the stack is not initialized and interrupts are masked.
;; Applications only have 64 cycles to initialize some registers.
;; Applications only have 64 cycles to initialize some registers.
;;
;;
;; To have a generic/configurable startup, initialize the stack to
;; To have a generic/configurable startup, initialize the stack to
;; the end of some memory region.  The _stack symbol is defined by
;; the end of some memory region.  The _stack symbol is defined by
;; the linker.
;; the linker.
;;
;;
        lds     #_stack
        lds     #_stack
        .sect   .install2,"ax",@progbits
        .sect   .install2,"ax",@progbits
;;
;;
;; Call a specific initialization operation.  The default is empty.
;; Call a specific initialization operation.  The default is empty.
;; It can be overriden by applications.  It is intended to initialize
;; It can be overriden by applications.  It is intended to initialize
;; the 68hc11 registers.  Function prototype is:
;; the 68hc11 registers.  Function prototype is:
;;
;;
;;      int __premain(void);
;;      int __premain(void);
;;
;;
        jsr     __premain
        jsr     __premain
;;
;;
;;
;;
;;
;;
        .sect   .install4,"ax",@progbits
        .sect   .install4,"ax",@progbits
        jsr     main
        jsr     main
fatal:
fatal:
        jsr     exit
        jsr     exit
        bra fatal
        bra fatal
;-----------------------------------------
;-----------------------------------------
; end startup code
; end startup code
;-----------------------------------------
;-----------------------------------------
;; Force loading of data section mapping and bss clear
;; Force loading of data section mapping and bss clear
        .globl  __map_data_section
        .globl  __map_data_section
        .globl  __init_bss_section
        .globl  __init_bss_section
 
 

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