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1cf59c2603
Reviewed-by: Wilco Dijkstra <Wilco.Dijkstra@arm.com> Reviewed-by: Carlos O'Donell <carlos@redhat.com>
48 lines
1.6 KiB
ArmAsm
48 lines
1.6 KiB
ArmAsm
/* Copyright (C) 1999-2025 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 License as
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published by the Free Software Foundation; either version 2.1 of the
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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 _ERRNO_H 1
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#include <bits/errno.h>
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/* Clone the calling process, but without copying the whole address space.
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The calling process is suspended until the new process exits or is
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replaced by a call to `execve'. Return -1 for errors, 0 to the new process,
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and the process ID of the new process to the old process. */
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ENTRY (__vfork)
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mov x0, #0x4111 /* CLONE_VM | CLONE_VFORK | SIGCHLD */
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mov x1, sp
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DO_CALL (clone, 2)
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cmn x0, #4095
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b.cs .Lsyscall_error
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cbz x0, L(child)
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RET
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L(child):
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/* Return with indirect branch in the child to support GCS.
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Compilers insert BTI instruction after vfork() to make
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sure return via BR works on systems with BTI. */
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br x30
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PSEUDO_END (__vfork)
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libc_hidden_def (__vfork)
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weak_alias (__vfork, vfork)
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strong_alias (__vfork, __libc_vfork)
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