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1/*
2 * Copyright (C) 2011 Texas Instruments Incorporated
3 * Author: Mark Salter <msalter@redhat.com>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 */
10
11#ifndef __ASM_C6X_SYSCALL_H
12#define __ASM_C6X_SYSCALL_H
13
14#include <linux/err.h>
15#include <linux/sched.h>
16
17static inline int syscall_get_nr(struct task_struct *task,
18 struct pt_regs *regs)
19{
20 return regs->b0;
21}
22
23static inline void syscall_rollback(struct task_struct *task,
24 struct pt_regs *regs)
25{
26 /* do nothing */
27}
28
29static inline long syscall_get_error(struct task_struct *task,
30 struct pt_regs *regs)
31{
32 return IS_ERR_VALUE(regs->a4) ? regs->a4 : 0;
33}
34
35static inline long syscall_get_return_value(struct task_struct *task,
36 struct pt_regs *regs)
37{
38 return regs->a4;
39}
40
41static inline void syscall_set_return_value(struct task_struct *task,
42 struct pt_regs *regs,
43 int error, long val)
44{
45 regs->a4 = error ?: val;
46}
47
48static inline void syscall_get_arguments(struct task_struct *task,
49 struct pt_regs *regs, unsigned int i,
50 unsigned int n, unsigned long *args)
51{
52 switch (i) {
53 case 0:
54 if (!n--)
55 break;
56 *args++ = regs->a4;
57 case 1:
58 if (!n--)
59 break;
60 *args++ = regs->b4;
61 case 2:
62 if (!n--)
63 break;
64 *args++ = regs->a6;
65 case 3:
66 if (!n--)
67 break;
68 *args++ = regs->b6;
69 case 4:
70 if (!n--)
71 break;
72 *args++ = regs->a8;
73 case 5:
74 if (!n--)
75 break;
76 *args++ = regs->b8;
77 case 6:
78 if (!n--)
79 break;
80 default:
81 BUG();
82 }
83}
84
85static inline void syscall_set_arguments(struct task_struct *task,
86 struct pt_regs *regs,
87 unsigned int i, unsigned int n,
88 const unsigned long *args)
89{
90 switch (i) {
91 case 0:
92 if (!n--)
93 break;
94 regs->a4 = *args++;
95 case 1:
96 if (!n--)
97 break;
98 regs->b4 = *args++;
99 case 2:
100 if (!n--)
101 break;
102 regs->a6 = *args++;
103 case 3:
104 if (!n--)
105 break;
106 regs->b6 = *args++;
107 case 4:
108 if (!n--)
109 break;
110 regs->a8 = *args++;
111 case 5:
112 if (!n--)
113 break;
114 regs->a9 = *args++;
115 case 6:
116 if (!n)
117 break;
118 default:
119 BUG();
120 }
121}
122
123#endif /* __ASM_C6X_SYSCALLS_H */
1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * Copyright (C) 2011 Texas Instruments Incorporated
4 * Author: Mark Salter <msalter@redhat.com>
5 */
6
7#ifndef __ASM_C6X_SYSCALL_H
8#define __ASM_C6X_SYSCALL_H
9
10#include <uapi/linux/audit.h>
11#include <linux/err.h>
12#include <linux/sched.h>
13
14static inline int syscall_get_nr(struct task_struct *task,
15 struct pt_regs *regs)
16{
17 return regs->b0;
18}
19
20static inline void syscall_rollback(struct task_struct *task,
21 struct pt_regs *regs)
22{
23 /* do nothing */
24}
25
26static inline long syscall_get_error(struct task_struct *task,
27 struct pt_regs *regs)
28{
29 return IS_ERR_VALUE(regs->a4) ? regs->a4 : 0;
30}
31
32static inline long syscall_get_return_value(struct task_struct *task,
33 struct pt_regs *regs)
34{
35 return regs->a4;
36}
37
38static inline void syscall_set_return_value(struct task_struct *task,
39 struct pt_regs *regs,
40 int error, long val)
41{
42 regs->a4 = error ?: val;
43}
44
45static inline void syscall_get_arguments(struct task_struct *task,
46 struct pt_regs *regs,
47 unsigned long *args)
48{
49 *args++ = regs->a4;
50 *args++ = regs->b4;
51 *args++ = regs->a6;
52 *args++ = regs->b6;
53 *args++ = regs->a8;
54 *args = regs->b8;
55}
56
57static inline void syscall_set_arguments(struct task_struct *task,
58 struct pt_regs *regs,
59 const unsigned long *args)
60{
61 regs->a4 = *args++;
62 regs->b4 = *args++;
63 regs->a6 = *args++;
64 regs->b6 = *args++;
65 regs->a8 = *args++;
66 regs->a9 = *args;
67}
68
69static inline int syscall_get_arch(struct task_struct *task)
70{
71 return IS_ENABLED(CONFIG_CPU_BIG_ENDIAN)
72 ? AUDIT_ARCH_C6XBE : AUDIT_ARCH_C6X;
73}
74
75#endif /* __ASM_C6X_SYSCALLS_H */