1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-or-later */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * OpenRISC Linux
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Linux architectural port borrowing liberally from similar works of
6*4882a593Smuzhiyun * others. All original copyrights apply as per the original source
7*4882a593Smuzhiyun * declaration.
8*4882a593Smuzhiyun *
9*4882a593Smuzhiyun * OpenRISC implementation:
10*4882a593Smuzhiyun * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
11*4882a593Smuzhiyun * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
12*4882a593Smuzhiyun * et al.
13*4882a593Smuzhiyun */
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun #ifndef __ASM_OPENRISC_SYSCALL_H__
16*4882a593Smuzhiyun #define __ASM_OPENRISC_SYSCALL_H__
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun #include <uapi/linux/audit.h>
19*4882a593Smuzhiyun #include <linux/err.h>
20*4882a593Smuzhiyun #include <linux/sched.h>
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun static inline int
syscall_get_nr(struct task_struct * task,struct pt_regs * regs)23*4882a593Smuzhiyun syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
24*4882a593Smuzhiyun {
25*4882a593Smuzhiyun return regs->orig_gpr11;
26*4882a593Smuzhiyun }
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun static inline void
syscall_rollback(struct task_struct * task,struct pt_regs * regs)29*4882a593Smuzhiyun syscall_rollback(struct task_struct *task, struct pt_regs *regs)
30*4882a593Smuzhiyun {
31*4882a593Smuzhiyun regs->gpr[11] = regs->orig_gpr11;
32*4882a593Smuzhiyun }
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun static inline long
syscall_get_error(struct task_struct * task,struct pt_regs * regs)35*4882a593Smuzhiyun syscall_get_error(struct task_struct *task, struct pt_regs *regs)
36*4882a593Smuzhiyun {
37*4882a593Smuzhiyun return IS_ERR_VALUE(regs->gpr[11]) ? regs->gpr[11] : 0;
38*4882a593Smuzhiyun }
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun static inline long
syscall_get_return_value(struct task_struct * task,struct pt_regs * regs)41*4882a593Smuzhiyun syscall_get_return_value(struct task_struct *task, struct pt_regs *regs)
42*4882a593Smuzhiyun {
43*4882a593Smuzhiyun return regs->gpr[11];
44*4882a593Smuzhiyun }
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun static inline void
syscall_set_return_value(struct task_struct * task,struct pt_regs * regs,int error,long val)47*4882a593Smuzhiyun syscall_set_return_value(struct task_struct *task, struct pt_regs *regs,
48*4882a593Smuzhiyun int error, long val)
49*4882a593Smuzhiyun {
50*4882a593Smuzhiyun regs->gpr[11] = (long) error ?: val;
51*4882a593Smuzhiyun }
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun static inline void
syscall_get_arguments(struct task_struct * task,struct pt_regs * regs,unsigned long * args)54*4882a593Smuzhiyun syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
55*4882a593Smuzhiyun unsigned long *args)
56*4882a593Smuzhiyun {
57*4882a593Smuzhiyun memcpy(args, ®s->gpr[3], 6 * sizeof(args[0]));
58*4882a593Smuzhiyun }
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun static inline void
syscall_set_arguments(struct task_struct * task,struct pt_regs * regs,const unsigned long * args)61*4882a593Smuzhiyun syscall_set_arguments(struct task_struct *task, struct pt_regs *regs,
62*4882a593Smuzhiyun const unsigned long *args)
63*4882a593Smuzhiyun {
64*4882a593Smuzhiyun memcpy(®s->gpr[3], args, 6 * sizeof(args[0]));
65*4882a593Smuzhiyun }
66*4882a593Smuzhiyun
syscall_get_arch(struct task_struct * task)67*4882a593Smuzhiyun static inline int syscall_get_arch(struct task_struct *task)
68*4882a593Smuzhiyun {
69*4882a593Smuzhiyun return AUDIT_ARCH_OPENRISC;
70*4882a593Smuzhiyun }
71*4882a593Smuzhiyun #endif
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