Warning: That file was not part of the compilation database. It may have many parsing errors.

1/* Copyright (C) 1999-2019 Free Software Foundation, Inc.
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
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.
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
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
17
18/* clone() is even more special than fork() as it mucks with stacks
19 and invokes a function in the right context after its all over. */
20
21#include <sysdep.h>
22#define _ERRNO_H 1
23#include <bits/errno.h>
24#include <tcb-offsets.h>
25
26/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg,
27 pid_t *ptid, void *tls, pid_t *ctid); */
28
29 .text
30ENTRY(__clone)
31 /* sanity check arguments. */
32 tst r4, r4
33 bt/s 0f
34 tst r5, r5
35 bf 1f
360:
37 bra .Lsyscall_error
38 mov #-EINVAL,r0
391:
40 /* insert the args onto the new stack */
41 mov.l r7, @-r5
42 /* save the function pointer as the 0th element */
43 mov.l r4, @-r5
44
45 /* do the system call */
46 mov r6, r4
47 mov.l @r15, r6
48 mov.l @(8,r15), r7
49 mov.l @(4,r15), r0
50 mov #+SYS_ify(clone), r3
51 trapa #0x15
52 mov r0, r1
53 mov #-12, r2
54 shad r2, r1
55 not r1, r1 // r1=0 means r0 = -1 to -4095
56 tst r1, r1 // i.e. error in linux
57 bf .Lclone_end
58.Lsyscall_error:
59 SYSCALL_ERROR_HANDLER
60.Lclone_end:
61 tst r0, r0
62 bt 2f
63.Lpseudo_end:
64 rts
65 nop
662:
67 /* terminate the stack frame */
68 mov #0, r14
69
70 /* thread starts */
71 mov.l @r15, r1
72 jsr @r1
73 mov.l @(4,r15), r4
74
75 /* we are done, passing the return value through r0 */
76 mov r0, r4
77 mov #+SYS_ify(exit), r3
78 trapa #0x15
79 .align 2
80.LG:
81 .long _GLOBAL_OFFSET_TABLE_
82.L3:
83 .long PLTJMP(C_SYMBOL_NAME(_exit))
84PSEUDO_END (__clone)
85
86libc_hidden_def (__clone)
87weak_alias (__clone, clone)
88

Warning: That file was not part of the compilation database. It may have many parsing errors.