31 lines
1.0 KiB
C
31 lines
1.0 KiB
C
/* _exit for MMIXware.
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Copyright (C) 2001 Hans-Peter Nilsson
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Permission to use, copy, modify, and distribute this software is
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freely granted, provided that the above copyright notice, this notice
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and the following disclaimer are preserved with no changes.
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THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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PURPOSE. */
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#include <_ansi.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include "sys/syscall.h"
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void _exit (int n)
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{
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/* The return status is passed on at exit from the simulator by all
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but the oldest versions of Knuth's mmixware simulator. Beware,
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"TRAP 0,0,0" is the instruction corresponding to (int32_t) 0 and
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the value 0 in $255 is common enough that a program crash jumping
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to e.g. uninitialized memory will look like "exit (0)". */
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__asm__ ("SET $255,%0\n\tTRAP 0,0,0"
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: /* No outputs. */
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: "r" (n)
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: "memory");
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}
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