1 | /* Copyright (C) 2003-2017 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 | |
24 | /* Both arm and powerpc implements fadvise64_64 with last 'advise' argument |
25 | just after 'fd' to avoid the requirement of implementing 7-arg syscalls. |
26 | ARM also defines __NR_fadvise64_64 as __NR_arm_fadvise64_64. |
27 | |
28 | tile requires __ASSUME_ALIGNED_REGISTER_PAIRS but implements the 32-bit |
29 | fadvise64_64 without the padding 0 after fd. |
30 | |
31 | s390 implements fadvice64_64 using a specific struct with arguments |
32 | packed inside. This is the only implementation handled in arch-specific |
33 | code. */ |
34 | |
35 | #ifdef __ASSUME_FADVISE64_64_NO_ALIGN |
36 | # undef __ALIGNMENT_ARG |
37 | # define __ALIGNMENT_ARG |
38 | #endif |
39 | |
40 | #ifndef __NR_fadvise64_64 |
41 | # define __NR_fadvise64_64 __NR_fadvise64 |
42 | #endif |
43 | |
44 | /* Advice the system about the expected behaviour of the application with |
45 | respect to the file associated with FD. */ |
46 | |
47 | int |
48 | __posix_fadvise64_l64 (int fd, off64_t offset, off64_t len, int advise) |
49 | { |
50 | INTERNAL_SYSCALL_DECL (err); |
51 | #ifdef __ASSUME_FADVISE64_64_6ARG |
52 | int ret = INTERNAL_SYSCALL_CALL (fadvise64_64, err, fd, advise, |
53 | SYSCALL_LL64 (offset), SYSCALL_LL64 (len)); |
54 | #else |
55 | int ret = INTERNAL_SYSCALL_CALL (fadvise64_64, err, fd, |
56 | __ALIGNMENT_ARG SYSCALL_LL64 (offset), |
57 | SYSCALL_LL64 (len), advise); |
58 | #endif |
59 | if (!INTERNAL_SYSCALL_ERROR_P (ret, err)) |
60 | return 0; |
61 | return INTERNAL_SYSCALL_ERRNO (ret, err); |
62 | } |
63 | |
64 | /* The type of the len argument was changed from size_t to off_t in |
65 | POSIX.1-2003 TC1. */ |
66 | #ifndef __OFF_T_MATCHES_OFF64_T |
67 | # if SHLIB_COMPAT(libc, GLIBC_2_2, GLIBC_2_3_3) |
68 | int __posix_fadvise64_l32 (int fd, off64_t offset, size_t len, int advise); |
69 | |
70 | int |
71 | attribute_compat_text_section |
72 | __posix_fadvise64_l32 (int fd, off64_t offset, size_t len, int advise) |
73 | { |
74 | return __posix_fadvise64_l64 (fd, offset, len, advise); |
75 | } |
76 | |
77 | versioned_symbol (libc, __posix_fadvise64_l64, posix_fadvise64, GLIBC_2_3_3); |
78 | compat_symbol (libc, __posix_fadvise64_l32, posix_fadvise64, GLIBC_2_2); |
79 | # else |
80 | weak_alias (__posix_fadvise64_l64, posix_fadvise64); |
81 | # endif |
82 | #else |
83 | weak_alias (__posix_fadvise64_l64, posix_fadvise64); |
84 | strong_alias (__posix_fadvise64_l64, posix_fadvise); |
85 | #endif |
86 | |