1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* syscall.h */
3 
4 #ifndef _ASM_PARISC_SYSCALL_H_
5 #define _ASM_PARISC_SYSCALL_H_
6 
7 #include <uapi/linux/audit.h>
8 #include <linux/compat.h>
9 #include <linux/err.h>
10 #include <asm/ptrace.h>
11 
12 #define NR_syscalls (__NR_Linux_syscalls)
13 
14 static inline long syscall_get_nr(struct task_struct *tsk,
15 				  struct pt_regs *regs)
16 {
17 	return regs->gr[20];
18 }
19 
20 static inline void syscall_set_nr(struct task_struct *tsk,
21 				  struct pt_regs *regs,
22 				  int nr)
23 {
24 	regs->gr[20] = nr;
25 }
26 
27 static inline void syscall_get_arguments(struct task_struct *tsk,
28 					 struct pt_regs *regs,
29 					 unsigned long *args)
30 {
31 	args[5] = regs->gr[21];
32 	args[4] = regs->gr[22];
33 	args[3] = regs->gr[23];
34 	args[2] = regs->gr[24];
35 	args[1] = regs->gr[25];
36 	args[0] = regs->gr[26];
37 }
38 
39 static inline void syscall_set_arguments(struct task_struct *tsk,
40 					 struct pt_regs *regs,
41 					 unsigned long *args)
42 {
43 	regs->gr[21] = args[5];
44 	regs->gr[22] = args[4];
45 	regs->gr[23] = args[3];
46 	regs->gr[24] = args[2];
47 	regs->gr[25] = args[1];
48 	regs->gr[26] = args[0];
49 }
50 
51 static inline long syscall_get_error(struct task_struct *task,
52 				     struct pt_regs *regs)
53 {
54 	unsigned long error = regs->gr[28];
55 	return IS_ERR_VALUE(error) ? error : 0;
56 }
57 
58 static inline long syscall_get_return_value(struct task_struct *task,
59 						struct pt_regs *regs)
60 {
61 	return regs->gr[28];
62 }
63 
64 static inline void syscall_set_return_value(struct task_struct *task,
65 					    struct pt_regs *regs,
66 					    int error, long val)
67 {
68 	regs->gr[28] = error ? error : val;
69 }
70 
71 static inline void syscall_rollback(struct task_struct *task,
72 				    struct pt_regs *regs)
73 {
74 	/* do nothing */
75 }
76 
77 static inline int syscall_get_arch(struct task_struct *task)
78 {
79 	int arch = AUDIT_ARCH_PARISC;
80 #ifdef CONFIG_64BIT
81 	if (!__is_compat_task(task))
82 		arch = AUDIT_ARCH_PARISC64;
83 #endif
84 	return arch;
85 }
86 #endif /*_ASM_PARISC_SYSCALL_H_*/
87