1 | /* Copyright (C) 2003-2018 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 | #include <errno.h> |
19 | #include <fcntl.h> |
20 | #include <shlib-compat.h> |
21 | |
22 | int __posix_fadvise64_l64 (int fd, off64_t offset, off64_t len, int advise); |
23 | libc_hidden_proto (__posix_fadvise64_l64) |
24 | |
25 | /* Both arm and powerpc implements fadvise64_64 with last 'advise' argument |
26 | just after 'fd' to avoid the requirement of implementing 7-arg syscalls. |
27 | ARM also defines __NR_fadvise64_64 as __NR_arm_fadvise64_64. |
28 | |
29 | tile requires __ASSUME_ALIGNED_REGISTER_PAIRS but implements the 32-bit |
30 | fadvise64_64 without the padding 0 after fd. |
31 | |
32 | s390 implements fadvice64_64 using a specific struct with arguments |
33 | packed inside. This is the only implementation handled in arch-specific |
34 | code. */ |
35 | |
36 | #ifdef __ASSUME_FADVISE64_64_NO_ALIGN |
37 | # undef __ALIGNMENT_ARG |
38 | # define __ALIGNMENT_ARG |
39 | #endif |
40 | |
41 | #ifndef __NR_fadvise64_64 |
42 | # define __NR_fadvise64_64 __NR_fadvise64 |
43 | #endif |
44 | |
45 | /* Advice the system about the expected behaviour of the application with |
46 | respect to the file associated with FD. */ |
47 | |
48 | int |
49 | __posix_fadvise64_l64 (int fd, off64_t offset, off64_t len, int advise) |
50 | { |
51 | INTERNAL_SYSCALL_DECL (err); |
52 | #ifdef __ASSUME_FADVISE64_64_6ARG |
53 | int ret = INTERNAL_SYSCALL_CALL (fadvise64_64, err, fd, advise, |
54 | SYSCALL_LL64 (offset), SYSCALL_LL64 (len)); |
55 | #else |
56 | int ret = INTERNAL_SYSCALL_CALL (fadvise64_64, err, fd, |
57 | __ALIGNMENT_ARG SYSCALL_LL64 (offset), |
58 | SYSCALL_LL64 (len), advise); |
59 | #endif |
60 | if (!INTERNAL_SYSCALL_ERROR_P (ret, err)) |
61 | return 0; |
62 | return INTERNAL_SYSCALL_ERRNO (ret, err); |
63 | } |
64 | |
65 | /* The type of the len argument was changed from size_t to off_t in |
66 | POSIX.1-2003 TC1. */ |
67 | #ifndef __OFF_T_MATCHES_OFF64_T |
68 | # if SHLIB_COMPAT(libc, GLIBC_2_2, GLIBC_2_3_3) |
69 | int __posix_fadvise64_l32 (int fd, off64_t offset, size_t len, int advise); |
70 | |
71 | int |
72 | attribute_compat_text_section |
73 | __posix_fadvise64_l32 (int fd, off64_t offset, size_t len, int advise) |
74 | { |
75 | return __posix_fadvise64_l64 (fd, offset, len, advise); |
76 | } |
77 | |
78 | versioned_symbol (libc, __posix_fadvise64_l64, posix_fadvise64, GLIBC_2_3_3); |
79 | compat_symbol (libc, __posix_fadvise64_l32, posix_fadvise64, GLIBC_2_2); |
80 | # else |
81 | weak_alias (__posix_fadvise64_l64, posix_fadvise64); |
82 | # endif |
83 | #else |
84 | weak_alias (__posix_fadvise64_l64, posix_fadvise64); |
85 | strong_alias (__posix_fadvise64_l64, posix_fadvise); |
86 | #endif |
87 | libc_hidden_def (__posix_fadvise64_l64) |
88 | |