Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __ASM_MICROBLAZE_SYSCALL_H
3#define __ASM_MICROBLAZE_SYSCALL_H
4
5#include <uapi/linux/audit.h>
6#include <linux/kernel.h>
7#include <linux/sched.h>
8#include <asm/ptrace.h>
9
10/* The system call number is given by the user in R12 */
11static inline long syscall_get_nr(struct task_struct *task,
12 struct pt_regs *regs)
13{
14 return regs->r12;
15}
16
17static inline void syscall_set_nr(struct task_struct *task,
18 struct pt_regs *regs,
19 int nr)
20{
21 regs->r12 = nr;
22}
23
24static inline void syscall_rollback(struct task_struct *task,
25 struct pt_regs *regs)
26{
27 /* TODO. */
28}
29
30static inline long syscall_get_error(struct task_struct *task,
31 struct pt_regs *regs)
32{
33 return IS_ERR_VALUE(regs->r3) ? regs->r3 : 0;
34}
35
36static inline long syscall_get_return_value(struct task_struct *task,
37 struct pt_regs *regs)
38{
39 return regs->r3;
40}
41
42static inline void syscall_set_return_value(struct task_struct *task,
43 struct pt_regs *regs,
44 int error, long val)
45{
46 if (error)
47 regs->r3 = -error;
48 else
49 regs->r3 = val;
50}
51
52static inline microblaze_reg_t microblaze_get_syscall_arg(struct pt_regs *regs,
53 unsigned int n)
54{
55 switch (n) {
56 case 5: return regs->r10;
57 case 4: return regs->r9;
58 case 3: return regs->r8;
59 case 2: return regs->r7;
60 case 1: return regs->r6;
61 case 0: return regs->r5;
62 default:
63 BUG();
64 }
65 return ~0;
66}
67
68static inline void syscall_get_arguments(struct task_struct *task,
69 struct pt_regs *regs,
70 unsigned long *args)
71{
72 unsigned int i = 0;
73 unsigned int n = 6;
74
75 while (n--)
76 *args++ = microblaze_get_syscall_arg(regs, i++);
77}
78
79asmlinkage unsigned long do_syscall_trace_enter(struct pt_regs *regs);
80asmlinkage void do_syscall_trace_leave(struct pt_regs *regs);
81
82static inline int syscall_get_arch(struct task_struct *task)
83{
84 return AUDIT_ARCH_MICROBLAZE;
85}
86#endif /* __ASM_MICROBLAZE_SYSCALL_H */