1 | /* Copyright (C) 2012-2022 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 | <https://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <unistd.h> |
19 | #include <sys/shm.h> |
20 | #include <ldsodefs.h> |
21 | |
22 | int |
23 | __getshmlba (void) |
24 | { |
25 | uint64_t hwcap = GLRO(dl_hwcap); |
26 | int pgsz = GLRO(dl_pagesize); |
27 | |
28 | if (hwcap & HWCAP_SPARC_V9) |
29 | { |
30 | if (pgsz < (16 * 1024)) |
31 | return 16 * 1024; |
32 | else |
33 | return pgsz; |
34 | } |
35 | else if (!(hwcap & HWCAP_SPARC_FLUSH)) |
36 | return 64 * 1024; |
37 | else |
38 | return 256 * 1024; |
39 | } |
40 | |