1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __ASM_SH_SYSCALL_32_H
3#define __ASM_SH_SYSCALL_32_H
4
5#include <uapi/linux/audit.h>
6#include <linux/kernel.h>
7#include <linux/sched.h>
8#include <linux/err.h>
9#include <asm/ptrace.h>
10
11/* The system call number is given by the user in R3 */
12static inline long syscall_get_nr(struct task_struct *task,
13				  struct pt_regs *regs)
14{
15	return (regs->tra >= 0) ? regs->regs[3] : -1L;
16}
17
18static inline void syscall_rollback(struct task_struct *task,
19				    struct pt_regs *regs)
20{
21	/*
22	 * XXX: This needs some thought. On SH we don't
23	 * save away the original r0 value anywhere.
24	 */
25}
26
27static inline long syscall_get_error(struct task_struct *task,
28				     struct pt_regs *regs)
29{
30	return IS_ERR_VALUE(regs->regs[0]) ? regs->regs[0] : 0;
31}
32
33static inline long syscall_get_return_value(struct task_struct *task,
34					    struct pt_regs *regs)
35{
36	return regs->regs[0];
37}
38
39static inline void syscall_set_return_value(struct task_struct *task,
40					    struct pt_regs *regs,
41					    int error, long val)
42{
43	regs->regs[0] = (long) error ?: val;
44}
45
46static inline void syscall_get_arguments(struct task_struct *task,
47					 struct pt_regs *regs,
48					 unsigned long *args)
49{
50
51	/* Argument pattern is: R4, R5, R6, R7, R0, R1 */
52	args[5] = regs->regs[1];
53	args[4] = regs->regs[0];
54	args[3] = regs->regs[7];
55	args[2] = regs->regs[6];
56	args[1] = regs->regs[5];
57	args[0] = regs->regs[4];
58}
59
60static inline void syscall_set_arguments(struct task_struct *task,
61					 struct pt_regs *regs,
62					 const unsigned long *args)
63{
64	regs->regs[1] = args[5];
65	regs->regs[0] = args[4];
66	regs->regs[7] = args[3];
67	regs->regs[6] = args[2];
68	regs->regs[5] = args[1];
69	regs->regs[4] = args[0];
70}
71
72static inline int syscall_get_arch(struct task_struct *task)
73{
74	int arch = AUDIT_ARCH_SH;
75
76#ifdef CONFIG_CPU_LITTLE_ENDIAN
77	arch |= __AUDIT_ARCH_LE;
78#endif
79	return arch;
80}
81#endif /* __ASM_SH_SYSCALL_32_H */
82