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[/] [openrisc/] [trunk/] [gnu-stable/] [newlib-1.18.0/] [libgloss/] [m68hc11/] [crt0.S] - Blame information for rev 829

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Line No. Rev Author Line
1 207 jeremybenn
/* Startup code for M68HC11/M68HC12.
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 * Copyright (C) 1999, 2000, 2001, 2002 Stephane Carrez (stcarrez@nerim.fr)
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 *
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 * The authors hereby grant permission to use, copy, modify, distribute,
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 * and license this software and its documentation for any purpose, provided
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 * that existing copyright notices are retained in all copies and that this
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 * notice is included verbatim in any distributions. No written agreement,
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 * license, or royalty fee is required for any of the authorized uses.
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 * Modifications to this software may be copyrighted by their authors
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 * and need not follow the licensing terms described here, provided that
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 * the new terms are clearly indicated on the first page of each file where
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 * they apply.
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 */
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;-----------------------------------------
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; startup code
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;-----------------------------------------
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        .file   "crt0.s"
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;;
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;;
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;; The linker concatenate the .install* sections in the following order:
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;;
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;; .install0    Setup the stack pointer
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;; .install1    Place holder for applications
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;; .install2    Optional installation of data section in memory
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;; .install3    Place holder for applications
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;; .install4    Invokes the main
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;;
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        .sect   .install0,"ax",@progbits
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        .globl _start
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_start:
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;;
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;; At this step, the stack is not initialized and interrupts are masked.
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;; Applications only have 64 cycles to initialize some registers.
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;;
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;; To have a generic/configurable startup, initialize the stack to
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;; the end of some memory region.  The _stack symbol is defined by
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;; the linker.
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;;
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        lds     #_stack
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        .sect   .install2,"ax",@progbits
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;;
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;; Call a specific initialization operation.  The default is empty.
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;; It can be overriden by applications.  It is intended to initialize
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;; the 68hc11 registers.  Function prototype is:
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;;
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;;      int __premain(void);
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;;
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        jsr     __premain
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;;
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;;
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;;
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        .sect   .install4,"ax",@progbits
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        jsr     main
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fatal:
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        jsr     exit
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        bra fatal
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;-----------------------------------------
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; end startup code
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;-----------------------------------------
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;; Force loading of data section mapping and bss clear
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        .globl  __map_data_section
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        .globl  __init_bss_section
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