2 * Copyright (C) 2008-2009 Red Hat, Inc. All rights reserved.
3 * Copyright 2010 Tilera Corporation. All Rights Reserved.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation, version 2.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
12 * NON INFRINGEMENT. See the GNU General Public License for
15 * See asm-generic/syscall.h for descriptions of what we must do here.
18 #ifndef _ASM_TILE_SYSCALL_H
19 #define _ASM_TILE_SYSCALL_H
21 #include <linux/sched.h>
22 #include <linux/err.h>
25 /* The array of function pointers for syscalls. */
26 extern void *sys_call_table[];
28 extern void *compat_sys_call_table[];
32 * Only the low 32 bits of orig_r0 are meaningful, so we return int.
33 * This importantly ignores the high bits on 64-bit, so comparisons
34 * sign-extend the low 32 bits.
36 static inline int syscall_get_nr(struct task_struct *t, struct pt_regs *regs)
38 return regs->regs[TREG_SYSCALL_NR];
41 static inline void syscall_rollback(struct task_struct *task,
44 regs->regs[0] = regs->orig_r0;
47 static inline long syscall_get_error(struct task_struct *task,
50 unsigned long error = regs->regs[0];
51 return IS_ERR_VALUE(error) ? error : 0;
54 static inline long syscall_get_return_value(struct task_struct *task,
60 static inline void syscall_set_return_value(struct task_struct *task,
64 regs->regs[0] = (long) error ?: val;
67 static inline void syscall_get_arguments(struct task_struct *task,
69 unsigned int i, unsigned int n,
73 memcpy(args, ®s[i], n * sizeof(args[0]));
76 static inline void syscall_set_arguments(struct task_struct *task,
78 unsigned int i, unsigned int n,
79 const unsigned long *args)
82 memcpy(®s[i], args, n * sizeof(args[0]));
85 #endif /* _ASM_TILE_SYSCALL_H */