/usr/include/xenomai/asm-nios2/syscall.h is in libxenomai-dev 2.6.4+dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (C) 2009 Philippe Gerum <rpm@xenomai.org>.
*
* Xenomai is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published
* by the Free Software Foundation; either version 2 of the License,
* or (at your option) any later version.
*
* Xenomai 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Xenomai; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
#ifndef _XENO_ASM_NIOS2_SYSCALL_H
#define _XENO_ASM_NIOS2_SYSCALL_H
#include <asm-generic/xenomai/syscall.h>
#include <asm/xenomai/tsc.h>
#define __xn_mux_shifted_id(id) (id << 24)
#define __xn_mux_code(shifted_id,op) (shifted_id|((op << 16) & 0xff0000)|(__xn_sys_mux & 0xffff))
#define __xn_lsys_xchg 0
#ifdef __KERNEL__
#include <linux/errno.h>
#include <asm/uaccess.h>
#include <asm/ptrace.h>
/* Register mapping for accessing syscall args. */
#define __xn_reg_mux(regs) ((regs)->r2)
#define __xn_reg_rval(regs) ((regs)->r2)
#define __xn_reg_arg1(regs) ((regs)->r4)
#define __xn_reg_arg2(regs) ((regs)->r5)
#define __xn_reg_arg3(regs) ((regs)->r6)
#define __xn_reg_arg4(regs) ((regs)->r7)
#define __xn_reg_arg5(regs) ((regs)->r8)
#define __xn_reg_mux_p(regs) ((__xn_reg_mux(regs) & 0xffff) == __xn_sys_mux)
#define __xn_mux_id(regs) ((__xn_reg_mux(regs) >> 24) & 0xff)
#define __xn_mux_op(regs) ((__xn_reg_mux(regs) >> 16) & 0xff)
#define __xn_linux_mux_p(regs, nr) (__xn_reg_mux(regs) == (nr))
/*
* Purposedly used inlines and not macros for the following routines
* so that we don't risk spurious side-effects on the value arg.
*/
static inline void __xn_success_return(struct pt_regs *regs, int v)
{
__xn_reg_rval(regs) = v;
}
static inline void __xn_error_return(struct pt_regs *regs, int v)
{
__xn_reg_rval(regs) = v;
}
static inline void __xn_status_return(struct pt_regs *regs, int v)
{
__xn_reg_rval(regs) = v;
}
static inline int __xn_interrupted_p(struct pt_regs *regs)
{
return __xn_reg_rval(regs) == -EINTR;
}
#else /* !__KERNEL__ */
#include <errno.h>
/*
* The following code defines an inline syscall mechanism used by
* Xenomai's real-time interfaces to invoke the skin module
* services in kernel space.
*/
#include <asm/traps.h>
#define __emit_syscall0(muxcode) \
({ \
long __ret; \
\
__asm__ __volatile__ ( \
"mov r2, %1\n\t" \
"trap\n\t" \
"mov %0, r2\n\t" \
: "=r"(__ret) \
: "r"(muxcode) \
: "r2", "memory" \
); \
__ret; \
})
#define __emit_syscall1(muxcode, a1) \
({ \
long __ret; \
\
__asm__ __volatile__ ( \
"mov r2, %1\n\t" \
"mov r4, %2\n\t" \
"trap\n\t" \
"mov %0, r2\n\t" \
: "=r"(__ret) \
: "r"(muxcode), \
"r" ((long)a1) \
: "r2", "r4", "memory" \
); \
__ret; \
})
#define __emit_syscall2(muxcode, a1, a2) \
({ \
long __ret; \
\
__asm__ __volatile__ ( \
"mov r2, %1\n\t" \
"mov r4, %2\n\t" \
"mov r5, %3\n\t" \
"trap\n\t" \
"mov %0, r2\n\t" \
: "=r"(__ret) \
: "r"(muxcode), \
"r" ((long)a1), \
"r" ((long)a2) \
: "r2", "r4", "r5", "memory" \
); \
__ret; \
})
#define __emit_syscall3(muxcode, a1, a2, a3) \
({ \
long __ret; \
\
__asm__ __volatile__ ( \
"mov r2, %1\n\t" \
"mov r4, %2\n\t" \
"mov r5, %3\n\t" \
"mov r6, %4\n\t" \
"trap\n\t" \
"mov %0, r2\n\t" \
: "=r"(__ret) \
: "r"(muxcode), \
"r" ((long)a1), \
"r" ((long)a2), \
"r" ((long)a3) \
: "r2", "r4", "r5", "r6", "memory" \
); \
__ret; \
})
#define __emit_syscall4(muxcode, a1, a2, a3, a4) \
({ \
long __ret; \
\
__asm__ __volatile__ ( \
"mov r2, %1\n\t" \
"mov r4, %2\n\t" \
"mov r5, %3\n\t" \
"mov r6, %4\n\t" \
"mov r7, %5\n\t" \
"trap\n\t" \
"mov %0, r2\n\t" \
: "=r"(__ret) \
: "r"(muxcode), \
"r" ((long)a1), \
"r" ((long)a2), \
"r" ((long)a3), \
"r" ((long)a4) \
: "r2", "r4", "r5", "r6", "r7", "memory" \
); \
__ret; \
})
#define __emit_syscall5(muxcode, a1, a2, a3, a4, a5) \
({ \
long __ret; \
\
__asm__ __volatile__ ( \
"mov r2, %1\n\t" \
"mov r4, %2\n\t" \
"mov r5, %3\n\t" \
"mov r6, %4\n\t" \
"mov r7, %5\n\t" \
"mov r8, %6\n\t" \
"trap\n\t" \
"mov %0, r2\n\t" \
: "=r"(__ret) \
: "r"(muxcode), \
"r" ((long)a1), \
"r" ((long)a2), \
"r" ((long)a3), \
"r" ((long)a4), \
"r" ((long)a5) \
: "r2", "r4", "r5", "r6", "r7", "r8", "memory" \
); \
__ret; \
})
#define XENOMAI_DO_SYSCALL(nr, shifted_id, op, args...) \
__emit_syscall##nr(__xn_mux_code(shifted_id,op), ##args)
#define XENOMAI_SYSCALL0(op) XENOMAI_DO_SYSCALL(0,0,op)
#define XENOMAI_SYSCALL1(op,a1) XENOMAI_DO_SYSCALL(1,0,op,a1)
#define XENOMAI_SYSCALL2(op,a1,a2) XENOMAI_DO_SYSCALL(2,0,op,a1,a2)
#define XENOMAI_SYSCALL3(op,a1,a2,a3) XENOMAI_DO_SYSCALL(3,0,op,a1,a2,a3)
#define XENOMAI_SYSCALL4(op,a1,a2,a3,a4) XENOMAI_DO_SYSCALL(4,0,op,a1,a2,a3,a4)
#define XENOMAI_SYSCALL5(op,a1,a2,a3,a4,a5) XENOMAI_DO_SYSCALL(5,0,op,a1,a2,a3,a4,a5)
#define XENOMAI_SYSBIND(a1,a2,a3,a4) XENOMAI_DO_SYSCALL(4,0,__xn_sys_bind,a1,a2,a3,a4)
#define XENOMAI_SKINCALL0(id,op) XENOMAI_DO_SYSCALL(0,id,op)
#define XENOMAI_SKINCALL1(id,op,a1) XENOMAI_DO_SYSCALL(1,id,op,a1)
#define XENOMAI_SKINCALL2(id,op,a1,a2) XENOMAI_DO_SYSCALL(2,id,op,a1,a2)
#define XENOMAI_SKINCALL3(id,op,a1,a2,a3) XENOMAI_DO_SYSCALL(3,id,op,a1,a2,a3)
#define XENOMAI_SKINCALL4(id,op,a1,a2,a3,a4) XENOMAI_DO_SYSCALL(4,id,op,a1,a2,a3,a4)
#define XENOMAI_SKINCALL5(id,op,a1,a2,a3,a4,a5) XENOMAI_DO_SYSCALL(5,id,op,a1,a2,a3,a4,a5)
/*
* uClibc does not always provide the following symbols for this arch;
* provide placeholders here. Note: let the compiler decides whether
* it wants to actually inline this routine, i.e. do not force
* always_inline.
*/
inline __attribute__((weak)) int pthread_atfork(void (*prepare)(void),
void (*parent)(void),
void (*child)(void))
{
return 0;
}
#include <errno.h>
inline __attribute__((weak)) int shm_open(const char *name,
int oflag,
mode_t mode)
{
errno = ENOSYS;
return -1;
}
inline __attribute__((weak)) int shm_unlink(const char *name)
{
errno = ENOSYS;
return -1;
}
#endif /* __KERNEL__ */
#endif /* !_XENO_ASM_NIOS2_SYSCALL_H */
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