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/* Copyright (C) 2012-2020 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
<https://www.gnu.org/licenses/>. */
#ifndef _LINUX_X32_SYSDEP_H
#define _LINUX_X32_SYSDEP_H 1
/* There is some commonality. */
#include <sysdeps/unix/sysv/linux/x86_64/sysdep.h>
#include <sysdeps/x86_64/x32/sysdep.h>
/* How to pass the off{64}_t argument on p{readv,writev}{64}. */
#undef LO_HI_LONG
#define LO_HI_LONG(val) (val)
#ifdef __ASSEMBLER__
/* Zero-extend 32-bit unsigned long int arguments to 64 bits. */
# undef ZERO_EXTEND_1
# define ZERO_EXTEND_1 movl %edi, %edi;
# undef ZERO_EXTEND_2
# define ZERO_EXTEND_2 movl %esi, %esi;
# undef ZERO_EXTEND_3
# define ZERO_EXTEND_3 movl %edx, %edx;
# if SYSCALL_ULONG_ARG_1 == 4 || SYSCALL_ULONG_ARG_2 == 4
# undef DOARGS_4
# define DOARGS_4 movl %ecx, %r10d;
# else
# undef ZERO_EXTEND_4
# define ZERO_EXTEND_4 movl %r10d, %r10d;
# endif
# undef ZERO_EXTEND_5
# define ZERO_EXTEND_5 movl %r8d, %r8d;
# undef ZERO_EXTEND_6
# define ZERO_EXTEND_6 movl %r9d, %r9d;
#else /* !__ASSEMBLER__ */
# undef ARGIFY
/* Enforce zero-extension for pointers and array system call arguments.
For integer types, extend to int64_t (the full register) using a
regular cast, resulting in zero or sign extension based on the
signedness of the original type. */
# define ARGIFY(X) \
({ \
_Pragma ("GCC diagnostic push"); \
_Pragma ("GCC diagnostic ignored \"-Wpointer-to-int-cast\""); \
(__builtin_classify_type (X) == 5 \
? (uintptr_t) (X) : (int64_t) (X)); \
_Pragma ("GCC diagnostic pop"); \
})
#endif /* __ASSEMBLER__ */
#endif /* linux/x86_64/x32/sysdep.h */
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