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 */
syscall_get_nr(struct task_struct * task,struct pt_regs * regs)12 static 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
syscall_rollback(struct task_struct * task,struct pt_regs * regs)18 static 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
syscall_get_error(struct task_struct * task,struct pt_regs * regs)27 static 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
syscall_get_return_value(struct task_struct * task,struct pt_regs * regs)33 static inline long syscall_get_return_value(struct task_struct *task,
34 struct pt_regs *regs)
35 {
36 return regs->regs[0];
37 }
38
syscall_set_return_value(struct task_struct * task,struct pt_regs * regs,int error,long val)39 static inline void syscall_set_return_value(struct task_struct *task,
40 struct pt_regs *regs,
41 int error, long val)
42 {
43 if (error)
44 regs->regs[0] = -error;
45 else
46 regs->regs[0] = val;
47 }
48
syscall_get_arguments(struct task_struct * task,struct pt_regs * regs,unsigned long * args)49 static inline void syscall_get_arguments(struct task_struct *task,
50 struct pt_regs *regs,
51 unsigned long *args)
52 {
53
54 /* Argument pattern is: R4, R5, R6, R7, R0, R1 */
55 args[5] = regs->regs[1];
56 args[4] = regs->regs[0];
57 args[3] = regs->regs[7];
58 args[2] = regs->regs[6];
59 args[1] = regs->regs[5];
60 args[0] = regs->regs[4];
61 }
62
syscall_set_arguments(struct task_struct * task,struct pt_regs * regs,const unsigned long * args)63 static inline void syscall_set_arguments(struct task_struct *task,
64 struct pt_regs *regs,
65 const unsigned long *args)
66 {
67 regs->regs[1] = args[5];
68 regs->regs[0] = args[4];
69 regs->regs[7] = args[3];
70 regs->regs[6] = args[2];
71 regs->regs[5] = args[1];
72 regs->regs[4] = args[0];
73 }
74
syscall_get_arch(struct task_struct * task)75 static inline int syscall_get_arch(struct task_struct *task)
76 {
77 int arch = AUDIT_ARCH_SH;
78
79 #ifdef CONFIG_CPU_LITTLE_ENDIAN
80 arch |= __AUDIT_ARCH_LE;
81 #endif
82 return arch;
83 }
84 #endif /* __ASM_SH_SYSCALL_32_H */
85