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/*
* Copyright (C) 2016 by Waldemar Brodkorb <wbx@uclibc-ng.org>
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
* ported from GNU libc
*/
/* Copyright (C) 2005-2016 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/>. */
#ifndef _BITS_SYSCALLS_H
#define _BITS_SYSCALLS_H
#ifndef _SYSCALL_H
# error "Never use <bits/syscalls.h> directly; include <sys/syscall.h> instead."
#endif
#ifndef __ASSEMBLER__
#include <errno.h>
#define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \
({ long _sys_result; \
{ \
register long _x8 __asm__ ("x8"); \
LOAD_ARGS_##nr (args) \
_x8 = (name); \
\
__asm__ volatile ( \
"svc 0 // syscall " # name \
: "=r" (_x0) : "r"(_x8) ASM_ARGS_##nr \
: "memory"); \
\
_sys_result = _x0; \
} \
_sys_result; })
/* Macros for setting up inline __asm__ input regs */
# define ASM_ARGS_0
# define ASM_ARGS_1 , "r" (_x0)
# define ASM_ARGS_2 ASM_ARGS_1, "r" (_x1)
# define ASM_ARGS_3 ASM_ARGS_2, "r" (_x2)
# define ASM_ARGS_4 ASM_ARGS_3, "r" (_x3)
# define ASM_ARGS_5 ASM_ARGS_4, "r" (_x4)
# define ASM_ARGS_6 ASM_ARGS_5, "r" (_x5)
# define ASM_ARGS_7 ASM_ARGS_6, "r" (_x6)
/* Macros for converting sys-call wrapper args into sys call args */
# define LOAD_ARGS_0() \
register long _x0 __asm__ ("x0");
# define LOAD_ARGS_1(x0) \
long _x0tmp; \
LOAD_ARGS_0 () \
_x0tmp = (long) (x0); \
_x0 = _x0tmp;
# define LOAD_ARGS_2(x0, x1) \
register long _x1 __asm__ ("x1"); \
long _x1tmp; \
LOAD_ARGS_1 (x0) \
_x1tmp = (long) (x1); \
_x1 = _x1tmp;
# define LOAD_ARGS_3(x0, x1, x2) \
register long _x2 __asm__ ("x2"); \
long _x2tmp; \
LOAD_ARGS_2 (x0, x1) \
_x2tmp = (long) (x2); \
_x2 = _x2tmp;
# define LOAD_ARGS_4(x0, x1, x2, x3) \
register long _x3 __asm__ ("x3"); \
long _x3tmp; \
LOAD_ARGS_3 (x0, x1, x2) \
_x3tmp = (long) (x3); \
_x3 = _x3tmp;
# define LOAD_ARGS_5(x0, x1, x2, x3, x4) \
register long _x4 __asm__ ("x4"); \
long _x4tmp; \
LOAD_ARGS_4 (x0, x1, x2, x3) \
_x4tmp = (long) (x4); \
_x4 = _x4tmp;
# define LOAD_ARGS_6(x0, x1, x2, x3, x4, x5) \
register long _x5 __asm__ ("x5"); \
long _x5tmp; \
LOAD_ARGS_5 (x0, x1, x2, x3, x4) \
_x5tmp = (long) (x5); \
_x5 = _x5tmp;
# define LOAD_ARGS_7(x0, x1, x2, x3, x4, x5, x6)\
register long _x6 __asm__ ("x6"); \
long _x6tmp; \
LOAD_ARGS_6 (x0, x1, x2, x3, x4, x5) \
_x6tmp = (long) (x6); \
_x6 = _x6tmp;
#endif /* ! __ASSEMBLER__ */
#endif /* _BITS_SYSCALLS_H */
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