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e4e11b1dba
It refactor how signals are defined by each architecture. Instead of include a generic header (bits/signum-generic.h) and undef non-default values in an arch specific header (bits/signum.h) the new scheme uses a common definition (bits/signum-generic.h) and each architectures add its specific definitions on a new header (bits/signum-arch.h). For Linux it requires copy some system default definitions to alpha, hppa, and sparc. They are historical values and newer ports uses the generic Linux signum-arch.h. For Hurd the BSD signum is removed and moved to a new header (it is used currently only on Hurd). Checked on a build against all affected ABIs. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
51 lines
1.8 KiB
ArmAsm
51 lines
1.8 KiB
ArmAsm
/* Copyright (C) 2000-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#define _SIGNAL_H
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#include <bits/signum-arch.h>
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#include <tcb-offsets.h>
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/* The following are defined in linux/sched.h, which unfortunately */
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/* is not safe for inclusion in an assembly file. */
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#define CLONE_VM 0x00000100 /* set if VM shared between processes */
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#define CLONE_VFORK 0x00004000 /* set if the parent wants the child to wake it up on mm_release */
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/* pid_t vfork(void); */
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/* Implemented as __clone_syscall(CLONE_VFORK | CLONE_VM | SIGCHLD, 0) */
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ENTRY (__libc_vfork)
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.prologue // work around a GAS bug which triggers if
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.body // first .prologue is not at the beginning of proc.
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alloc r2=ar.pfs,0,0,2,0
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mov out0=CLONE_VM+CLONE_VFORK+SIGCHLD
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mov out1=0 /* Standard sp value. */
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;;
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DO_CALL (SYS_ify (clone))
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cmp.eq p6,p0=0,r8
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(p6) br.cond.dptk 1f
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1:
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cmp.eq p6,p0=-1,r10
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(p6) br.cond.spnt.few __syscall_error
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ret
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PSEUDO_END (__libc_vfork)
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strong_alias (__libc_vfork, __vfork)
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libc_hidden_def (__vfork)
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weak_alias (__vfork, vfork)
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