/*
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* Copyright (C) 2001-2014 Philippe Gerum <rpm@xenomai.org>.
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*
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* Xenomai is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published
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* by the Free Software Foundation; either version 2 of the License,
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* or (at your option) any later version.
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*
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* Xenomai is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Xenomai; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*/
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#ifndef _COBALT_X86_ASM_SYSCALL_H
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#define _COBALT_X86_ASM_SYSCALL_H
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#include <linux/errno.h>
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#include <asm/ptrace.h>
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#include <asm-generic/xenomai/syscall.h>
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/*
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* Cobalt and Linux syscall numbers can be fetched from ORIG_AX,
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* masking out the __COBALT_SYSCALL_BIT marker.
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*/
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#define __xn_reg_sys(regs) ((regs)->orig_ax)
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#define __xn_reg_rval(regs) ((regs)->ax)
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#define __xn_reg_pc(regs) ((regs)->ip)
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#define __xn_reg_sp(regs) ((regs)->sp)
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#define __xn_syscall_p(regs) (__xn_reg_sys(regs) & __COBALT_SYSCALL_BIT)
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#ifdef CONFIG_XENO_ARCH_SYS3264
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#define __xn_syscall(regs) __COBALT_CALL32_SYSNR(__xn_reg_sys(regs) \
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& ~__COBALT_SYSCALL_BIT)
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#else
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#define __xn_syscall(regs) (__xn_reg_sys(regs) & ~__COBALT_SYSCALL_BIT)
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#endif
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#ifdef CONFIG_IA32_EMULATION
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#define __xn_nr_root_syscalls \
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({ \
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struct thread_info *__ti = current_thread_info(); \
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__ti->status & TS_COMPAT ? IA32_NR_syscalls : NR_syscalls; \
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})
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#else
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#define __xn_nr_root_syscalls NR_syscalls
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#endif
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/*
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* Root syscall number with predicate (valid only if
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* !__xn_syscall_p(__regs)).
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*/
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#define __xn_rootcall_p(__regs, __code) \
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({ \
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*(__code) = __xn_reg_sys(__regs); \
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*(__code) < __xn_nr_root_syscalls; \
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})
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static inline void __xn_error_return(struct pt_regs *regs, int v)
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{
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__xn_reg_rval(regs) = v;
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}
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static inline void __xn_status_return(struct pt_regs *regs, long v)
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{
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__xn_reg_rval(regs) = v;
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}
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static inline int __xn_interrupted_p(struct pt_regs *regs)
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{
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return __xn_reg_rval(regs) == -EINTR;
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}
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static inline
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int xnarch_local_syscall(unsigned long a1, unsigned long a2,
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unsigned long a3, unsigned long a4,
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unsigned long a5)
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{
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return -ENOSYS;
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}
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#endif /* !_COBALT_X86_ASM_SYSCALL_H */
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