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688903eb | 1 | /* Copyright (C) 2015-2018 Free Software Foundation, Inc. |
b5791037 | 2 | This file is part of the GNU C Library. |
28f540f4 | 3 | |
b5791037 | 4 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
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. | |
28f540f4 | 8 | |
b5791037 UD |
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 | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
28f540f4 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
28f540f4 | 17 | |
eeddfa91 | 18 | #include <bits/wordsize.h> |
41e77f36 | 19 | #include <kernel-features.h> |
eeddfa91 | 20 | |
fb1cf108 L |
21 | /* Set error number and return -1. A target may choose to return the |
22 | internal function, __syscall_error, which sets errno and returns -1. | |
23 | We use -1l, instead of -1, so that it can be casted to (void *). */ | |
24 | #define INLINE_SYSCALL_ERROR_RETURN_VALUE(err) \ | |
25 | ({ \ | |
26 | __set_errno (err); \ | |
27 | -1l; \ | |
28 | }) | |
eeddfa91 AZ |
29 | |
30 | /* Provide a dummy argument that can be used to force register | |
31 | alignment for register pairs if required by the syscall ABI. */ | |
32 | #ifdef __ASSUME_ALIGNED_REGISTER_PAIRS | |
33 | #define __ALIGNMENT_ARG 0, | |
34 | #define __ALIGNMENT_COUNT(a,b) b | |
35 | #else | |
36 | #define __ALIGNMENT_ARG | |
37 | #define __ALIGNMENT_COUNT(a,b) a | |
38 | #endif | |
39 | ||
40 | /* Provide a common macro to pass 64-bit value on syscalls. */ | |
41 | #if __WORDSIZE == 64 || defined __ASSUME_WORDSIZE64_ILP32 | |
42 | # define SYSCALL_LL(val) (val) | |
43 | # define SYSCALL_LL64(val) (val) | |
44 | #else | |
45 | #define SYSCALL_LL(val) \ | |
46 | __LONG_LONG_PAIR ((val) >> 31, (val)) | |
47 | #define SYSCALL_LL64(val) \ | |
48 | __LONG_LONG_PAIR ((long) ((val) >> 32), (long) ((val) & 0xffffffff)) | |
49 | #endif | |
4751bbe2 | 50 | |
2152cf7e AZ |
51 | /* Provide a common macro to pass 64-bit value on pread and pwrite |
52 | syscalls. */ | |
53 | #ifdef __ASSUME_PRW_DUMMY_ARG | |
54 | # define SYSCALL_LL_PRW(val) 0, SYSCALL_LL (val) | |
55 | # define SYSCALL_LL64_PRW(val) 0, SYSCALL_LL64 (val) | |
56 | #else | |
57 | # define SYSCALL_LL_PRW(val) __ALIGNMENT_ARG SYSCALL_LL (val) | |
58 | # define SYSCALL_LL64_PRW(val) __ALIGNMENT_ARG SYSCALL_LL64 (val) | |
59 | #endif | |
60 | ||
4751bbe2 | 61 | /* Provide a macro to pass the off{64}_t argument on p{readv,writev}{64}. */ |
46870067 AZ |
62 | #define LO_HI_LONG(val) \ |
63 | (long) (val), \ | |
64 | (long) (((uint64_t) (val)) >> 32) | |
60f9423b AZ |
65 | |
66 | /* Exports the __send symbol on send.c linux implementation (some ABI have | |
67 | it missing due the usage of a old generic version without it). */ | |
68 | #define HAVE_INTERNAL_SEND_SYMBOL 1 |