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bfff8b1b | 1 | /* Copyright (C) 1999-2017 Free Software Foundation, Inc. |
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2 | This file is part of the GNU C Library. |
3 | Contributed by Andreas Schwab <schwab@gnu.org>. | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
3214b89b AJ |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
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9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
3214b89b | 13 | Lesser General Public License for more details. |
cd641f74 | 14 | |
3214b89b | 15 | You should have received a copy of the GNU Lesser General Public |
ab84e3ff PE |
16 | License along with the GNU C Library. If not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
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18 | |
19 | #include <sysdep.h> | |
20 | #define _ERRNO_H 1 | |
21 | #include <bits/errno.h> | |
11b9e55b | 22 | #include <tcb-offsets.h> |
40111cb9 | 23 | |
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24 | /* Clone the calling process, but without copying the whole address space. |
25 | The calling process is suspended until the new process exits or is | |
26 | replaced by a call to `execve'. Return -1 for errors, 0 to the new process, | |
27 | and the process ID of the new process to the old process. */ | |
28 | ||
29 | ENTRY (__vfork) | |
30 | ||
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31 | /* Pop the return PC value into A0. */ |
32 | movel %sp@+, %a0 | |
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33 | cfi_adjust_cfa_offset (-4) |
34 | cfi_register (%pc, %a0) | |
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35 | |
36 | /* Stuff the syscall number in D0 and trap into the kernel. */ | |
37 | movel #SYS_ify (vfork), %d0 | |
38 | trap #0 | |
40111cb9 | 39 | |
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40 | tstl %d0 |
41 | jmi .Lerror /* Branch forward if it failed. */ | |
42 | ||
43 | /* Jump to the return PC. */ | |
44 | jmp %a0@ | |
45 | ||
46 | .Lerror: | |
47 | /* Push back the return PC. */ | |
48 | movel %a0,%sp@- | |
50e73d13 AS |
49 | cfi_adjust_cfa_offset (4) |
50 | cfi_rel_offset (%pc, 0) | |
cd641f74 | 51 | |
a9f1039f | 52 | #ifndef PIC |
2eb74642 | 53 | jbra SYSCALL_ERROR_LABEL |
2eb74642 | 54 | #endif |
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55 | |
56 | PSEUDO_END (__vfork) | |
db160231 | 57 | libc_hidden_def (__vfork) |
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58 | |
59 | weak_alias (__vfork, vfork) | |
11b9e55b | 60 | strong_alias (__vfork, __libc_vfork) |