2 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
9 #ifndef _ASM_ARC_SYSCALL_H
10 #define _ASM_ARC_SYSCALL_H 1
12 #include <linux/err.h>
13 #include <linux/sched.h>
14 #include <asm/unistd.h>
15 #include <asm/ptrace.h> /* in_syscall() */
18 syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
20 if (user_mode(regs) && in_syscall(regs))
27 syscall_rollback(struct task_struct *task, struct pt_regs *regs)
29 /* XXX: I can't fathom how pt_regs->r8 will be clobbered ? */
30 regs->r8 = regs->orig_r8;
34 syscall_get_error(struct task_struct *task, struct pt_regs *regs)
36 /* 0 if syscall succeeded, otherwise -Errorcode */
37 return IS_ERR_VALUE(regs->r0) ? regs->r0 : 0;
41 syscall_get_return_value(struct task_struct *task, struct pt_regs *regs)
47 syscall_set_return_value(struct task_struct *task, struct pt_regs *regs,
50 regs->r0 = (long) error ?: val;
54 * @i: argument index [0,5]
55 * @n: number of arguments; n+i must be [1,6].
58 syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
59 unsigned int i, unsigned int n, unsigned long *args)
61 unsigned long *inside_ptregs = &(regs->r0);
67 args[i++] = (*inside_ptregs);