Last change
on this file since 474 was
444,
checked in by satin@…, 6 years ago
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add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
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File size:
1.3 KB
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Rev | Line | |
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[444] | 1 | /* crt0.S -- startup file for moxie |
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| 2 | * |
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| 3 | * Copyright (c) 2008, 2009, 2014 Anthony Green |
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| 4 | * |
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| 5 | * The authors hereby grant permission to use, copy, modify, distribute, |
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| 6 | * and license this software and its documentation for any purpose, provided |
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| 7 | * that existing copyright notices are retained in all copies and that this |
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| 8 | * notice is included verbatim in any distributions. No written agreement, |
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| 9 | * license, or royalty fee is required for any of the authorized uses. |
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| 10 | * Modifications to this software may be copyrighted by their authors |
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| 11 | * and need not follow the licensing terms described here, provided that |
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| 12 | * the new terms are clearly indicated on the first page of each file where |
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| 13 | * they apply. |
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| 14 | */ |
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| 15 | |
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| 16 | .globl __start |
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| 17 | .weak _start |
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| 18 | .text |
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| 19 | .type __start,@function |
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| 20 | __start: |
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| 21 | _start: |
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| 22 | ldi.l $sp, _stack /* set the top of stack */ |
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| 23 | xor $fp, $fp /* zero fp to allow unwinders to stop */ |
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| 24 | |
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| 25 | /* zero the bss area */ |
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| 26 | ldi.l $r0, __bss_start__ |
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| 27 | xor $r1, $r1 |
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| 28 | ldi.l $r2, __bss_end__ |
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| 29 | sub $r2, $r0 |
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| 30 | jsra memset |
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| 31 | |
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| 32 | /* Call _init to invoke static constructors, etc. */ |
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| 33 | jsra _init |
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| 34 | |
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| 35 | /* Call _fini at exit time for static destructors. */ |
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| 36 | ldi.l $r0, _fini |
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| 37 | jsra atexit |
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| 38 | |
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| 39 | /* Set argc and argv. These are populated by the simulator. */ |
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| 40 | lda.l $r0, 0x4 |
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| 41 | ldi.l $r1, 0x8 |
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| 42 | |
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| 43 | jsra main |
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| 44 | jsra exit |
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| 45 | |
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| 46 | .Lend: |
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| 47 | .size __start,(.Lend-__start) |
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