/*
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* SPDX-License-Identifier: GPL-2.0
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*
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* Copyright (C) 2015 Dmitriy Cherkasov <dmitriy@mperpetuo.com>
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* Copyright (C) 2021 Philippe Gerum <rpm@xenomai.org>
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*/
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#ifndef _COBALT_ARM64_DOVETAIL_SYSCALL_H
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#define _COBALT_ARM64_DOVETAIL_SYSCALL_H
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#include <linux/errno.h>
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#include <linux/uaccess.h>
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#include <asm/unistd.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 syscallno,
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* masking out the __COBALT_SYSCALL_BIT marker.
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*/
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#define __xn_reg_sys(__regs) ((unsigned long)(__regs)->syscallno)
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#define __xn_syscall_p(regs) ((__xn_reg_sys(regs) & __COBALT_SYSCALL_BIT) != 0)
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#define __xn_syscall(__regs) ((unsigned long)(__xn_reg_sys(__regs) & ~__COBALT_SYSCALL_BIT))
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#define __xn_reg_rval(__regs) ((__regs)->regs[0])
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#define __xn_reg_pc(__regs) ((__regs)->pc)
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#define __xn_reg_sp(__regs) ((__regs)->sp)
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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_syscall(__regs); \
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*(__code) < NR_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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/* We need none of these with Dovetail. */
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return -ENOSYS;
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}
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#endif /* !_COBALT_ARM64_DOVETAIL_SYSCALL_H */
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