/usr/include/xenomai/asm-blackfin/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.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 | /*
* 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>
#include <asm/xenomai/tsc.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)
/* 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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