| /* Copyright (C) 2015-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <bits/wordsize.h> |
| #include <kernel-features.h> |
| |
| /* Set error number and return -1. A target may choose to return the |
| internal function, __syscall_error, which sets errno and returns -1. |
| We use -1l, instead of -1, so that it can be casted to (void *). */ |
| #define INLINE_SYSCALL_ERROR_RETURN_VALUE(err) \ |
| ({ \ |
| __set_errno (err); \ |
| -1l; \ |
| }) |
| |
| /* Provide a dummy argument that can be used to force register |
| alignment for register pairs if required by the syscall ABI. */ |
| #ifdef __ASSUME_ALIGNED_REGISTER_PAIRS |
| #define __ALIGNMENT_ARG 0, |
| #define __ALIGNMENT_COUNT(a,b) b |
| #else |
| #define __ALIGNMENT_ARG |
| #define __ALIGNMENT_COUNT(a,b) a |
| #endif |
| |
| /* Provide a common macro to pass 64-bit value on syscalls. */ |
| #if __WORDSIZE == 64 || defined __ASSUME_WORDSIZE64_ILP32 |
| # define SYSCALL_LL(val) (val) |
| # define SYSCALL_LL64(val) (val) |
| #else |
| #define SYSCALL_LL(val) \ |
| __LONG_LONG_PAIR ((val) >> 31, (val)) |
| #define SYSCALL_LL64(val) \ |
| __LONG_LONG_PAIR ((long) ((val) >> 32), (long) ((val) & 0xffffffff)) |
| #endif |
| |
| /* Provide a common macro to pass 64-bit value on pread and pwrite |
| syscalls. */ |
| #ifdef __ASSUME_PRW_DUMMY_ARG |
| # define SYSCALL_LL_PRW(val) 0, SYSCALL_LL (val) |
| # define SYSCALL_LL64_PRW(val) 0, SYSCALL_LL64 (val) |
| #else |
| # define SYSCALL_LL_PRW(val) __ALIGNMENT_ARG SYSCALL_LL (val) |
| # define SYSCALL_LL64_PRW(val) __ALIGNMENT_ARG SYSCALL_LL64 (val) |
| #endif |
| |
| /* Provide a macro to pass the off{64}_t argument on p{readv,writev}{64}. */ |
| #define LO_HI_LONG(val) \ |
| (long) (val), \ |
| (long) (((uint64_t) (val)) >> 32) |
| |
| /* Exports the __send symbol on send.c linux implementation (some ABI have |
| it missing due the usage of a old generic version without it). */ |
| #define HAVE_INTERNAL_SEND_SYMBOL 1 |
