syscall32.h

/*
 * Copyright (C) 2014 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 _COBALT_ASM_GENERIC_SYSCALL32_H
#define _COBALT_ASM_GENERIC_SYSCALL32_H
 
#ifdef CONFIG_XENO_ARCH_SYS3264
 
#define __COBALT_COMPAT32_BASE          256 /* Power of two. */
 
#define __COBALT_SYSNR32emu(__reg)                                      \
        ({                                                              \
                long __nr = __reg;                                      \
                if (in_compat_syscall())                                \
                        __nr += __COBALT_COMPAT32_BASE;                 \
                __nr;                                                   \
        })
 
#define __COBALT_COMPAT32emu(__reg)                                     \
        (in_compat_syscall() ? __COBALT_COMPAT_BIT : 0)
 
#if __NR_COBALT_SYSCALLS > __COBALT_COMPAT32_BASE
#error "__NR_COBALT_SYSCALLS > __COBALT_COMPAT32_BASE"
#endif
 
#define __syshand32emu__(__name)        \
        ((cobalt_syshand)(void (*)(void))(CoBaLt32emu_ ## __name))
 
#define __COBALT_CALL32emu_INITHAND(__handler)  \
        [__COBALT_COMPAT32_BASE ... __COBALT_COMPAT32_BASE + __NR_COBALT_SYSCALLS-1] = __handler,
 
#define __COBALT_CALL32emu_INITMODE(__mode)     \
        [__COBALT_COMPAT32_BASE ... __COBALT_COMPAT32_BASE + __NR_COBALT_SYSCALLS-1] = __mode,
 
/* compat default entry (no thunk) */
#define __COBALT_CALL32emu_ENTRY(__name, __handler)             \
        [sc_cobalt_ ## __name + __COBALT_COMPAT32_BASE] = __handler,
 
/* compat thunk installation */
#define __COBALT_CALL32emu_THUNK(__name)        \
        __COBALT_CALL32emu_ENTRY(__name, __syshand32emu__(__name))
 
/* compat thunk implementation. */
#define COBALT_SYSCALL32emu(__name, __mode, __args)     \
        long CoBaLt32emu_ ## __name __args
 
/* compat thunk declaration. */
#define COBALT_SYSCALL32emu_DECL(__name, __args)        \
        long CoBaLt32emu_ ## __name __args
 
#else /* !CONFIG_XENO_ARCH_SYS3264 */
 
/* compat support disabled. */
 
#define __COBALT_SYSNR32emu(__reg)      (__reg)
 
#define __COBALT_COMPAT32emu(__reg)     0
 
#define __COBALT_CALL32emu_INITHAND(__handler)
 
#define __COBALT_CALL32emu_INITMODE(__mode)
 
#define __COBALT_CALL32emu_ENTRY(__name, __handler)
 
#define __COBALT_CALL32emu_THUNK(__name)
 
#define COBALT_SYSCALL32emu_DECL(__name, __args)
 
#endif /* !CONFIG_XENO_ARCH_SYS3264 */
 
#define __COBALT_CALL32_ENTRY(__name, __handler)        \
        __COBALT_CALL32emu_ENTRY(__name, __handler)
 
#define __COBALT_CALL32_INITHAND(__handler)     \
        __COBALT_CALL32emu_INITHAND(__handler)
 
#define __COBALT_CALL32_INITMODE(__mode)        \
        __COBALT_CALL32emu_INITMODE(__mode)
 
/* Already checked for __COBALT_SYSCALL_BIT */
#define __COBALT_CALL32_SYSNR(__reg)    __COBALT_SYSNR32emu(__reg)
 
#define __COBALT_CALL_COMPAT(__reg)     __COBALT_COMPAT32emu(__reg)
 
#endif /* !_COBALT_ASM_GENERIC_SYSCALL32_H */