24 lines
588 B
ArmAsm
24 lines
588 B
ArmAsm
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/* $NetBSD: compat_Ovfork.S,v 1.2 2011/01/15 07:31:13 matt Exp $ */
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/*
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* pid = vfork();
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*
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* r4 == 0 in parent process, 1 in child process.
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* r3 == pid of child in parent, pid of parent in child.
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*/
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#include "SYS.h"
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#if defined(LIBC_SCCS)
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__RCSID("$NetBSD: compat_Ovfork.S,v 1.2 2011/01/15 07:31:13 matt Exp $")
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#endif
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WARN_REFERENCES(vfork, \
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"warning: reference to compatibility vfork(); include <unistd.h> for correct reference")
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SYSCALL(vfork)
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addi %r4,%r4,-1 # from 1 to 0 in child, 0 to -1 in parent
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and %r3,%r3,%r4 # return 0 in child, pid in parent
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blr
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END(vfork)
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