glibc/sysdeps/unix/bsd/sun/m68k/vfork.S
Roland McGrath 7176f4e4b5 * misc/efgcvt_r.c (ecvt_r): Handle negative values.
* stdlib/stdlib.h: Replace __CONSTVALUE by attribute.
	* stdlib/abs.c, stdlib/div.c, stdlib/labs.c, stdlib/ldiv.c,
	sysdeps/generic/hypot.c: Remove obsolete __CONSTVALUE.

	* stdio-common/printf_fp.c (__printf_fp): Fix parameter
	declaration.

	* sysdeps/generic/putenv.c (putenv): Fix second argument of
	setenv.

	* sysdeps/ieee754/hypot.c: New file, extracted out of cabs.c.
	* sysdeps/ieee754/cabs.c: Don't define hypot here.

	* sysdeps/ieee754/ieee754.h (union ieee854_long_double): Fix
	definition of ieee_nan alternative.

	* sysdeps/m68k/__longjmp.c, sysdeps/m68k/setjmp.c: Add register
 	prefix spec.

	* sysdeps/m68k/ffs.c (ffs): Fix register constraint.

	* sysdeps/m68k/fpu/__math.h: Include <errno.h>.  Replace obsolete
	__CONSTVALUE by attribute.
	(floor): Round to negative infinity.
	(rint, expm1) [__NO_MATH_INLINES]: Don't define, to avoid type
	clash when compiling source.
	(pow): Handle x == 0 and x < 0.
	(ceil, __isinf, __isnan): Fix register constraints.
	(__isinfl, __isnanl): Added.
	* sysdeps/m68k/fpu/acos.c, sysdeps/m68k/fpu/atan2.c,
	sysdeps/m68k/fpu/fmod.c, sysdeps/m68k/fpu/ldexp.c,
	sysdeps/m68k/fpu/pow.c: Remove obsolete __CONSTVALUE.

	* sysdeps/m68k/bsd-_setjmp.S, sysdeps/m68k/bsd-setjmp.S: Fix
	assembler syntax.

	* sysdeps/unix/bsd/bsd4.4/fchdir.S (fchdir): Take only one
 	argument.

	* sysdeps/unix/bsd/clock.c (timeval_to_clock_t): Fix timeval to
	clock_t conversion.
	(clock): Don't multiply by CLOCKS_PER_SEC.

	* sysdeps/unix/bsd/poll.c (poll): Fix msec to timeval conversion.

	* sysdeps/unix/bsd/sun/m68k/brk.S (brk): Compare with address of
	__end.

	* sysdeps/unix/bsd/sun/m68k/vfork.S: Fix assembler syntax.

	* sysdeps/unix/bsd/ualarm.c (ualarm): Fix timeval calculation.

	* sysdeps/unix/bsd/vax/vfork.S: Remove duplicate label.
1996-01-17 02:03:00 +00:00

56 lines
1.8 KiB
ArmAsm

/* Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <sysdep.h>
#ifndef SYS_vfork
#define SYS_vfork 66
#endif
/* Clone the calling process, but without copying the whole address space.
The the calling process is suspended until the the new process exits or is
replaced by a call to `execve'. Return -1 for errors, 0 to the new process,
and the process ID of the new process to the old process. */
.globl ___vfork
___vfork:
/* Pop the return PC value into A0. */
movel sp@+, a0
/* Push the syscall number and trap into the kernel. */
movel #SYS_vfork, sp@-
trap #0
bcs error /* Branch forward if it failed. */
/* It succeeded. See which fork we're in. D1 is now 0 for the
parent and 1 for the child. Decrement it to make it -1 (all
bits set) for the parent, and 0 (no bits set) for the child.
Then AND it with D0, so the parent gets D0&-1==R0, and the child
gets D0&0==0. */
subql #1, d1
andl d1, d0
/* Jump to the return PC. */
jmp a0@
error:
movel d0, _errno
moveq #-1, d0
jmp a0@
weak_alias (__vfork, vfork)