| 1 | /* Copyright (C) 1999-2024 Free Software Foundation, Inc. |
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| 2 | |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public License as |
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| 7 | published by the Free Software Foundation; either version 2.1 of the |
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| 8 | License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #include <sysdep.h> |
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| 20 | #define _ERRNO_H 1 |
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| 21 | #include <bits/errno.h> |
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| 22 | |
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| 23 | /* Clone the calling process, but without copying the whole address space. |
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| 24 | The calling process is suspended until the new process exits or is |
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| 25 | replaced by a call to `execve'. Return -1 for errors, 0 to the new process, |
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| 26 | and the process ID of the new process to the old process. */ |
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| 27 | |
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| 28 | ENTRY (__vfork) |
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| 29 | |
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| 30 | mov x0, #0x4111 /* CLONE_VM | CLONE_VFORK | SIGCHLD */ |
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| 31 | mov x1, sp |
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| 32 | DO_CALL (clone, 2) |
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| 33 | |
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| 34 | cmn x0, #4095 |
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| 35 | b.cs .Lsyscall_error |
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| 36 | RET |
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| 37 | |
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| 38 | PSEUDO_END (__vfork) |
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| 39 | libc_hidden_def (__vfork) |
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| 40 | |
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| 41 | weak_alias (__vfork, vfork) |
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| 42 | strong_alias (__vfork, __libc_vfork) |
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| 43 | |
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