57 lines
1.4 KiB
ArmAsm
57 lines
1.4 KiB
ArmAsm
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/*
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* crt0.S -- startup file for D30V systems.
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*
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* Copyright (c) 1997 Cygnus Support
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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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.file "crt0.S"
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.text
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.globl _start
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.extern main
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.extern exit
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.extern __stack
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.extern __sbss_start
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.extern __sbss_end
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.extern __ebss_start
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.extern __ebss_end
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.extern __bss_start
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.extern __bss_end
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.extern memset
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.type _start,@function
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_start: or.l sp,r0,__stack
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/* Zero the .sbss area */
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or.l r2,r0,__sbss_start
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or.l r4,r0,__sbss_end
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sub r4,r4,r2 || or.s r3,r0,0
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bsrtnz.l r4,(memset)
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/* Zero the .ebss area */
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or.l r2,r0,__ebss_start
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or.l r4,r0,__ebss_end
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sub r4,r4,r2 || or.s r3,r0,0
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bsrtnz.l r4,(memset)
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/* Zero the .bss area */
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or.l r2,r0,__bss_start
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or.l r4,r0,__bss_end
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sub r4,r4,r2 || or.s r3,r0,0
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bsrtnz.l r4,(memset)
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or.s r2,r0,0 || or.s r3,r0,0
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or r4,r0,0 || nop
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jsr.l (main)
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jsr.l (exit)
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.size _start,.-_start
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