78 lines
1.9 KiB
C
78 lines
1.9 KiB
C
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/*
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* OpenRISC Linux
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*
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* Linux architectural port borrowing liberally from similar works of
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* others. All original copyrights apply as per the original source
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* declaration.
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*
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* OpenRISC implementation:
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* Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
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* Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
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* et al.
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*
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* This program 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 by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef __ASM_OPENRISC_SYSCALL_H__
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#define __ASM_OPENRISC_SYSCALL_H__
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#include <linux/err.h>
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#include <linux/sched.h>
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static inline int
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syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
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{
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return regs->syscallno ? regs->syscallno : -1;
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}
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static inline void
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syscall_rollback(struct task_struct *task, struct pt_regs *regs)
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{
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regs->gpr[11] = regs->orig_gpr11;
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}
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static inline long
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syscall_get_error(struct task_struct *task, struct pt_regs *regs)
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{
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return IS_ERR_VALUE(regs->gpr[11]) ? regs->gpr[11] : 0;
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}
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static inline long
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syscall_get_return_value(struct task_struct *task, struct pt_regs *regs)
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{
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return regs->gpr[11];
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}
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static inline void
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syscall_set_return_value(struct task_struct *task, struct pt_regs *regs,
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int error, long val)
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{
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if (error)
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regs->gpr[11] = -error;
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else
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regs->gpr[11] = val;
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}
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static inline void
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syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
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unsigned int i, unsigned int n, unsigned long *args)
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{
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BUG_ON(i + n > 6);
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memcpy(args, ®s->gpr[3 + i], n * sizeof(args[0]));
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}
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static inline void
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syscall_set_arguments(struct task_struct *task, struct pt_regs *regs,
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unsigned int i, unsigned int n, const unsigned long *args)
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{
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BUG_ON(i + n > 6);
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memcpy(®s->gpr[3 + i], args, n * sizeof(args[0]));
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}
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#endif
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