| 1 | /* Copyright (C) 2004-2022 Free Software Foundation, Inc. |
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| 2 | This file is part of the GNU C Library. |
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| 3 | |
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| 4 | The GNU C Library is free software; you can redistribute it and/or |
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| 5 | modify it under the terms of the GNU Lesser General Public |
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| 6 | License as published by the Free Software Foundation; either |
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| 7 | version 2.1 of the License, or (at your option) any later version. |
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| 8 | |
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| 9 | The GNU C Library is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | Lesser General Public License for more details. |
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| 13 | |
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| 14 | You should have received a copy of the GNU Lesser General Public |
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| 15 | License along with the GNU C Library; if not, see |
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| 16 | <https://www.gnu.org/licenses/>. */ |
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| 17 | |
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| 18 | #include <sysdep.h> |
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| 19 | #define _ERRNO_H 1 |
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| 20 | #include <bits/errno.h> |
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| 21 | #include <tcb-offsets.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 (__libc_vfork) |
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| 29 | |
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| 30 | mov.w .L1, r3 |
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| 31 | trapa #0x10 |
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| 32 | mov r0, r1 |
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| 33 | |
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| 34 | mov #-12, r2 |
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| 35 | shad r2, r1 |
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| 36 | not r1, r1 // r1=0 means r0 = -1 to -4095 |
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| 37 | tst r1, r1 // i.e. error in linux |
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| 38 | bf .Lpseudo_end |
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| 39 | SYSCALL_ERROR_HANDLER |
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| 40 | .Lpseudo_end: |
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| 41 | rts |
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| 42 | nop |
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| 43 | .L1: |
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| 44 | .word __NR_vfork |
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| 45 | .align 2 |
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| 46 | PSEUDO_END (__libc_vfork) |
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| 47 | |
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| 48 | #if IS_IN (libc) |
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| 49 | weak_alias (__libc_vfork, vfork) |
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| 50 | strong_alias (__libc_vfork, __vfork) |
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| 51 | libc_hidden_def (__vfork) |
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| 52 | #endif |
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| 53 | |
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