1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3 * Author: Hanlu Li <lihanlu@loongson.cn>
4 * Huacai Chen <chenhuacai@loongson.cn>
5 *
6 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
7 */
8
9 #ifndef __ASM_LOONGARCH_SYSCALL_H
10 #define __ASM_LOONGARCH_SYSCALL_H
11
12 #include <linux/compiler.h>
13 #include <uapi/linux/audit.h>
14 #include <linux/elf-em.h>
15 #include <linux/kernel.h>
16 #include <linux/sched.h>
17 #include <linux/uaccess.h>
18 #include <asm/ptrace.h>
19 #include <asm/unistd.h>
20
21 extern void *sys_call_table[];
22
23 static inline long syscall_get_nr(struct task_struct *task,
24 struct pt_regs *regs)
25 {
26 return regs->regs[11];
27 }
28
29 static inline void syscall_rollback(struct task_struct *task,
30 struct pt_regs *regs)
31 {
32 regs->regs[4] = regs->orig_a0;
33 }
34
35 static inline long syscall_get_error(struct task_struct *task,
36 struct pt_regs *regs)
37 {
38 unsigned long error = regs->regs[4];
39
40 return IS_ERR_VALUE(error) ? error : 0;
41 }
42
43 static inline long syscall_get_return_value(struct task_struct *task,
44 struct pt_regs *regs)
45 {
46 return regs->regs[4];
47 }
48
49 static inline void syscall_set_return_value(struct task_struct *task,
50 struct pt_regs *regs,
51 int error, long val)
52 {
53 regs->regs[4] = (long) error ? error : val;
54 }
55
56 static inline void syscall_get_arguments(struct task_struct *task,
57 struct pt_regs *regs,
58 unsigned long *args)
59 {
60 args[0] = regs->orig_a0;
61 memcpy(&args[1], ®s->regs[5], 5 * sizeof(long));
62 }
63
64 static inline int syscall_get_arch(struct task_struct *task)
65 {
66 return AUDIT_ARCH_LOONGARCH64;
67 }
68
69 static inline bool arch_syscall_is_vdso_sigreturn(struct pt_regs *regs)
70 {
71 return false;
72 }
73
74 #endif /* __ASM_LOONGARCH_SYSCALL_H */
75
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