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6d7e8eda | 1 | /* Copyright (C) 2004-2023 Free Software Foundation, Inc. |
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2 | This file is part of the GNU C Library. |
3 | ||
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 |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
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8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
3846ef75 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
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17 | |
18 | #include <sysdep.h> | |
19 | #define _ERRNO_H 1 | |
20 | #include <bits/errno.h> | |
d936d379 | 21 | #include <tcb-offsets.h> |
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22 | |
23 | /* Clone the calling process, but without copying the whole address space. | |
24 | The calling process is suspended until the new process exits or is | |
25 | replaced by a call to `execve'. Return -1 for errors, 0 to the new process, | |
26 | and the process ID of the new process to the old process. */ | |
27 | ||
d936d379 | 28 | ENTRY (__libc_vfork) |
3846ef75 | 29 | |
d936d379 | 30 | mov.w .L1, r3 |
876f9634 | 31 | trapa #0x10 |
3846ef75 | 32 | mov r0, r1 |
d936d379 | 33 | |
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34 | mov #-12, r2 |
35 | shad r2, r1 | |
36 | not r1, r1 // r1=0 means r0 = -1 to -4095 | |
37 | tst r1, r1 // i.e. error in linux | |
bbd17455 | 38 | bf .Lpseudo_end |
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39 | SYSCALL_ERROR_HANDLER |
40 | .Lpseudo_end: | |
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41 | rts |
42 | nop | |
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43 | .L1: |
44 | .word __NR_vfork | |
d936d379 RM |
45 | .align 2 |
46 | PSEUDO_END (__libc_vfork) | |
d1436edc | 47 | |
4f41c682 | 48 | #if IS_IN (libc) |
d936d379 RM |
49 | weak_alias (__libc_vfork, vfork) |
50 | strong_alias (__libc_vfork, __vfork) | |
a4baf360 | 51 | libc_hidden_def (__vfork) |
d936d379 | 52 | #endif |