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/*
* Copyright (C) 2018 by Waldemar Brodkorb <wbx@uclibc-ng.org>
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
* ported from GNU C Library
*/
#ifndef _BITS_SYSCALLS_H
#define _BITS_SYSCALLS_H
#ifndef _SYSCALL_H
# error "Never use <bits/syscalls.h> directly; include <sys/syscall.h> instead."
#endif
#define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \
({ long _sys_result; \
{ \
register long int _a7 __asm__ ("a7"); \
LOAD_ARGS_##nr (args) \
_a7 = (name); \
\
__asm__ volatile ( \
"scall\n\t" \
: "=r" (_a0) \
: "r"(_a7) ASM_ARGS_##nr \
: "memory"); \
_sys_result = _a0; \
} \
_sys_result; \
})
/* Macros for setting up inline __asm__ input regs */
# define ASM_ARGS_0
# define ASM_ARGS_1 , "r" (_a0)
# define ASM_ARGS_2 ASM_ARGS_1, "r" (_a1)
# define ASM_ARGS_3 ASM_ARGS_2, "r" (_a2)
# define ASM_ARGS_4 ASM_ARGS_3, "r" (_a3)
# define ASM_ARGS_5 ASM_ARGS_4, "r" (_a4)
# define ASM_ARGS_6 ASM_ARGS_5, "r" (_a5)
# define ASM_ARGS_7 ASM_ARGS_6, "r" (_a6)
/* Macros for converting sys-call wrapper args into sys call args */
# define LOAD_ARGS_0() \
register long _a0 __asm__ ("a0");
# define LOAD_ARGS_1(a0) \
long _a0tmp; \
LOAD_ARGS_0 () \
_a0tmp = (long) (a0); \
_a0 = _a0tmp;
# define LOAD_ARGS_2(a0, a1) \
register long _a1 __asm__ ("a1"); \
long _a1tmp; \
LOAD_ARGS_1 (a0) \
_a1tmp = (long) (a1); \
_a1 = _a1tmp;
# define LOAD_ARGS_3(a0, a1, a2) \
register long _a2 __asm__ ("a2"); \
long _a2tmp; \
LOAD_ARGS_2 (a0, a1) \
_a2tmp = (long) (a2); \
_a2 = _a2tmp;
# define LOAD_ARGS_4(a0, a1, a2, a3) \
register long _a3 __asm__ ("a3"); \
long _a3tmp; \
LOAD_ARGS_3 (a0, a1, a2) \
_a3tmp = (long) (a3); \
_a3 = _a3tmp;
# define LOAD_ARGS_5(a0, a1, a2, a3, a4) \
register long _a4 __asm__ ("a4"); \
long _a4tmp; \
LOAD_ARGS_4 (a0, a1, a2, a3) \
_a4tmp = (long) (a4); \
_a4 = _a4tmp;
# define LOAD_ARGS_6(a0, a1, a2, a3, a4, a5) \
register long _a5 __asm__ ("a5"); \
long _a5tmp; \
LOAD_ARGS_5 (a0, a1, a2, a3, a4) \
_a5tmp = (long) (a5); \
_a5 = _a5tmp;
# define LOAD_ARGS_7(a0, a1, a2, a3, a4, a5, a6)\
register long _a6 __asm__ ("a6"); \
long _a6tmp; \
LOAD_ARGS_6 (a0, a1, a2, a3, a4, a5) \
_a6tmp = (long) (a6); \
_a6 = _a6tmp;
#endif
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