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SystemV-R4 ABI for M68k returns pointers in %a0, so we have to make sure

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that CERROR returns -1 in %a0 in addition to %d0 and %d1, to make functions
like mmap(2), mremap(2), shmat(2) or sbrk(2) return -1 in case of an error.
A side effect of this bug was a segfault caused by jemalloc, when mmap()
failed.
This commit is contained in:
phx 2009-10-03 22:28:33 +00:00
parent 458410e7b5
commit c9394f466a
1 changed files with 5 additions and 2 deletions
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7
lib/libc/arch/m68k/sys/cerror.S
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@ -1,4 +1,4 @@
/* $NetBSD: cerror.S,v 1.14 2003/08/07 16:42:14 agc Exp $ */
/* $NetBSD: cerror.S,v 1.15 2009/10/03 22:28:33 phx Exp $ */
/*-
* Copyright (c) 1990 The Regents of the University of California.
@ -39,7 +39,7 @@
#if 0
RCSID("from: @(#)cerror.s 5.1 (Berkeley) 5/12/90")
#else
RCSID("$NetBSD: cerror.S,v 1.14 2003/08/07 16:42:14 agc Exp $")
RCSID("$NetBSD: cerror.S,v 1.15 2009/10/03 22:28:33 phx Exp $")
#endif
#endif /* LIBC_SCCS and not lint */
@ -80,4 +80,7 @@ _ENTRY(CERROR)
#endif /* _REENTRANT */
movl #-1,%d0
movl #-1,%d1
#ifdef __SVR4_ABI__
movl %d0,%a0
#endif
rts