1/*
 2 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
 3 *
 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.
 7 */
 8
 9#ifndef _ASM_ARC_SYSCALL_H
10#define _ASM_ARC_SYSCALL_H  1
11
 
12#include <linux/err.h>
13#include <linux/sched.h>
14#include <asm/unistd.h>
15#include <asm/ptrace.h>		/* in_syscall() */
16
 
 
17static inline long
18syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
19{
20	if (user_mode(regs) && in_syscall(regs))
21		return regs->r8;
22	else
23		return -1;
24}
25
26static inline void
27syscall_rollback(struct task_struct *task, struct pt_regs *regs)
28{
29	regs->r0 = regs->orig_r0;
30}
31
32static inline long
33syscall_get_error(struct task_struct *task, struct pt_regs *regs)
34{
35	/* 0 if syscall succeeded, otherwise -Errorcode */
36	return IS_ERR_VALUE(regs->r0) ? regs->r0 : 0;
37}
38
39static inline long
40syscall_get_return_value(struct task_struct *task, struct pt_regs *regs)
41{
42	return regs->r0;
43}
44
45static inline void
46syscall_set_return_value(struct task_struct *task, struct pt_regs *regs,
47			 int error, long val)
48{
49	regs->r0 = (long) error ?: val;
50}
51
52/*
53 * @i:      argument index [0,5]
54 * @n:      number of arguments; n+i must be [1,6].
55 */
56static inline void
57syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
58		      unsigned int i, unsigned int n, unsigned long *args)
59{
60	unsigned long *inside_ptregs = &(regs->r0);
61	inside_ptregs -= i;
62
63	BUG_ON((i + n) > 6);
64
65	while (n--) {
66		args[i++] = (*inside_ptregs);
67		inside_ptregs--;
68	}
 
 
 
 
 
 
 
 
 
 
69}
70
71#endif

 1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
 
 
 
 
 4 */
 5
 6#ifndef _ASM_ARC_SYSCALL_H
 7#define _ASM_ARC_SYSCALL_H  1
 8
 9#include <uapi/linux/audit.h>
10#include <linux/err.h>
11#include <linux/sched.h>
12#include <asm/unistd.h>
13#include <asm/ptrace.h>		/* in_syscall() */
14
15extern void *sys_call_table[];
16
17static inline long
18syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
19{
20	if (user_mode(regs) && in_syscall(regs))
21		return regs->r8;
22	else
23		return -1;
24}
25
26static inline void
27syscall_rollback(struct task_struct *task, struct pt_regs *regs)
28{
29	regs->r0 = regs->orig_r0;
30}
31
32static inline long
33syscall_get_error(struct task_struct *task, struct pt_regs *regs)
34{
35	/* 0 if syscall succeeded, otherwise -Errorcode */
36	return IS_ERR_VALUE(regs->r0) ? regs->r0 : 0;
37}
38
39static inline long
40syscall_get_return_value(struct task_struct *task, struct pt_regs *regs)
41{
42	return regs->r0;
43}
44
45static inline void
46syscall_set_return_value(struct task_struct *task, struct pt_regs *regs,
47			 int error, long val)
48{
49	regs->r0 = (long) error ?: val;
50}
51
52/*
53 * @i:      argument index [0,5]
54 * @n:      number of arguments; n+i must be [1,6].
55 */
56static inline void
57syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
58		      unsigned long *args)
59{
60	unsigned long *inside_ptregs = &(regs->r0);
61	unsigned int n = 6;
62	unsigned int i = 0;
 
63
64	while (n--) {
65		args[i++] = (*inside_ptregs);
66		inside_ptregs--;
67	}
68}
69
70static inline int
71syscall_get_arch(struct task_struct *task)
72{
73	return IS_ENABLED(CONFIG_ISA_ARCOMPACT)
74		? (IS_ENABLED(CONFIG_CPU_BIG_ENDIAN)
75			? AUDIT_ARCH_ARCOMPACTBE : AUDIT_ARCH_ARCOMPACT)
76		: (IS_ENABLED(CONFIG_CPU_BIG_ENDIAN)
77			? AUDIT_ARCH_ARCV2BE : AUDIT_ARCH_ARCV2);
78}
79
80#endif