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
syscall_get_nr(struct task_struct * task,struct pt_regs * regs)14 static inline int syscall_get_nr(struct task_struct *task,
15 struct pt_regs *regs)
16 {
17 return regs->b0;
18 }
19
syscall_rollback(struct task_struct * task,struct pt_regs * regs)20 static inline void syscall_rollback(struct task_struct *task,
21 struct pt_regs *regs)
22 {
23 /* do nothing */
24 }
25
syscall_get_error(struct task_struct * task,struct pt_regs * regs)26 static 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
syscall_get_return_value(struct task_struct * task,struct pt_regs * regs)32 static inline long syscall_get_return_value(struct task_struct *task,
33 struct pt_regs *regs)
34 {
35 return regs->a4;
36 }
37
syscall_set_return_value(struct task_struct * task,struct pt_regs * regs,int error,long val)38 static 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
syscall_get_arguments(struct task_struct * task,struct pt_regs * regs,unsigned long * args)45 static 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
syscall_set_arguments(struct task_struct * task,struct pt_regs * regs,const unsigned long * args)57 static 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
syscall_get_arch(struct task_struct * task)69 static 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 */
76
