/usr/include/xenomai/asm-blackfin/syscall.h is in libxenomai-dev 2.6.2.1-2ubuntu2.
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) 2005 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_BLACKFIN_SYSCALL_H
#define _XENO_ASM_BLACKFIN_SYSCALL_H
#include <asm-generic/xenomai/syscall.h>
/* The way we mangle Xenomai syscalls with our multiplexer
marker. Note: watch out for the p0 sign convention used by Linux
(i.e. negative syscall number in orig_p0 meaning "non-syscall
entry"). */
#define __xn_mux_code(shifted_id,op) (shifted_id|((op << 16) & 0xff0000)|(__xn_sys_mux & 0xffff))
#define __xn_mux_shifted_id(id) (id << 24)
/* Local syscalls -- the braindamage thing about this arch is the
absence of atomic ops usable from user-space; so we export what
we need as syscalls implementing those ops from kernel space. Sigh... */
#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)->orig_p0)
#define __xn_reg_rval(regs) ((regs)->r0)
#define __xn_reg_arg1(regs) ((regs)->r0)
#define __xn_reg_arg2(regs) ((regs)->r1)
#define __xn_reg_arg3(regs) ((regs)->r2)
#define __xn_reg_arg4(regs) ((regs)->r3)
#define __xn_reg_arg5(regs) ((regs)->r4)
#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>
#include <time.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.
*/
#define __emit_syscall0(muxcode, ...) \
({ \
long __res; \
__asm__ __volatile__ ( \
"excpt 0;\n\t" \
: "=q0" (__res) \
: "qA" (muxcode), \
##__VA_ARGS__ \
: "CC", "memory"); \
__res; \
})
#define __emit_syscall1(muxcode, a1, ...) \
__emit_syscall0(muxcode, "q0"(a1), ##__VA_ARGS__)
#define __emit_syscall2(muxcode, a1, a2, ...) \
__emit_syscall1(muxcode, a1, "q1"(a2), ##__VA_ARGS__)
#define __emit_syscall3(muxcode, a1, a2, a3, ...) \
__emit_syscall2(muxcode, a1, a2, "q2"(a3), ##__VA_ARGS__)
#define __emit_syscall4(muxcode, a1, a2, a3, a4, ...) \
__emit_syscall3(muxcode, a1, a2, a3, "q3"(a4), ##__VA_ARGS__)
#define __emit_syscall5(muxcode, a1, a2, a3, a4, a5, ...) \
__emit_syscall4(muxcode, a1, a2, a3, a4, "q4"(a5), ##__VA_ARGS__)
#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)
static inline unsigned long long __xn_rdtsc (void)
{
union {
struct {
unsigned long l;
unsigned long h;
} s;
unsigned long long t;
} u;
unsigned long cy2;
__asm__ __volatile__ ( "1: %0 = CYCLES2\n"
"%1 = CYCLES\n"
"%2 = CYCLES2\n"
"CC = %2 == %0\n"
"if !cc jump 1b\n"
:"=d" (u.s.h),
"=d" (u.s.l),
"=d" (cy2)
: /*no input*/ : "cc");
return u.t;
}
/* uClibc does not provide pthread_atfork() for this arch; provide it
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;
}
int clock_nanosleep(clockid_t __clock_id, int __flags,
const struct timespec *__req,
struct timespec *__rem);
#endif /* __KERNEL__ */
#endif /* !_XENO_ASM_BLACKFIN_SYSCALL_H */
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