| 1 | /* vfork for ARC Linux. |
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| 2 | Copyright (C) 2020-2024 Free Software Foundation, Inc. |
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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 |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the 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 <sys/syscall.h> |
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| 20 | #include <sysdep.h> |
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| 21 | #include <tcb-offsets.h> |
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| 22 | #define _SIGNAL_H |
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| 23 | #include <bits/signum-arch.h> /* For SIGCHLD */ |
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| 24 | |
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| 25 | #define CLONE_VM 0x00000100 |
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| 26 | #define CLONE_VFORK 0x00004000 |
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| 27 | #define CLONE_FLAGS_FOR_VFORK (CLONE_VM|CLONE_VFORK|SIGCHLD) |
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| 28 | |
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| 29 | ENTRY (__vfork) |
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| 30 | mov r0, CLONE_FLAGS_FOR_VFORK |
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| 31 | mov_s r1, sp |
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| 32 | mov r8, __NR_clone |
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| 33 | ARC_TRAP_INSN |
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| 34 | |
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| 35 | cmp r0, 0 |
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| 36 | jge [blink] ; child continues |
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| 37 | |
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| 38 | b __syscall_error |
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| 39 | PSEUDO_END (__vfork) |
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| 40 | libc_hidden_def (__vfork) |
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| 41 | |
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| 42 | weak_alias (__vfork, vfork) |
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| 43 | |
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