1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  * OpenRISC Linux
4  *
5  * Linux architectural port borrowing liberally from similar works of
6  * others.  All original copyrights apply as per the original source
7  * declaration.
8  *
9  * OpenRISC implementation:
10  * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
11  * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
12  * et al.
13  */
14 
15 #ifndef __ASM_OPENRISC_SYSCALL_H__
16 #define __ASM_OPENRISC_SYSCALL_H__
17 
18 #include <uapi/linux/audit.h>
19 #include <linux/err.h>
20 #include <linux/sched.h>
21 
22 static inline int
23 syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
24 {
25 	return regs->orig_gpr11;
26 }
27 
28 static inline void
29 syscall_rollback(struct task_struct *task, struct pt_regs *regs)
30 {
31 	regs->gpr[11] = regs->orig_gpr11;
32 }
33 
34 static inline long
35 syscall_get_error(struct task_struct *task, struct pt_regs *regs)
36 {
37 	return IS_ERR_VALUE(regs->gpr[11]) ? regs->gpr[11] : 0;
38 }
39 
40 static inline long
41 syscall_get_return_value(struct task_struct *task, struct pt_regs *regs)
42 {
43 	return regs->gpr[11];
44 }
45 
46 static inline void
47 syscall_set_return_value(struct task_struct *task, struct pt_regs *regs,
48 			 int error, long val)
49 {
50 	regs->gpr[11] = (long) error ?: val;
51 }
52 
53 static inline void
54 syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
55 		      unsigned long *args)
56 {
57 	memcpy(args, &regs->gpr[3], 6 * sizeof(args[0]));
58 }
59 
60 static inline void
61 syscall_set_arguments(struct task_struct *task, struct pt_regs *regs,
62 		      const unsigned long *args)
63 {
64 	memcpy(&regs->gpr[3], args, 6 * sizeof(args[0]));
65 }
66 
67 static inline int syscall_get_arch(struct task_struct *task)
68 {
69 	return AUDIT_ARCH_OPENRISC;
70 }
71 #endif
72