diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/sysdep.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/sysdep.h | 45 |
1 files changed, 44 insertions, 1 deletions
diff --git a/sysdeps/unix/sysv/linux/sysdep.h b/sysdeps/unix/sysv/linux/sysdep.h index c98fc3afcb..4fd0a9bae3 100644 --- a/sysdeps/unix/sysv/linux/sysdep.h +++ b/sysdeps/unix/sysv/linux/sysdep.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2015-2016 Free Software Foundation, Inc. +/* 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 @@ -15,6 +15,9 @@ 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 *). */ @@ -23,3 +26,43 @@ __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 |