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 regs->regs[0] = (long) error ?: val;
44 }
45
syscall_get_arguments(struct task_struct * task,struct pt_regs * regs,unsigned long * args)46 static 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
syscall_get_arch(struct task_struct * task)60 static inline int syscall_get_arch(struct task_struct *task)
61 {
62 int arch = AUDIT_ARCH_SH;
63
64 #ifdef CONFIG_CPU_LITTLE_ENDIAN
65 arch |= __AUDIT_ARCH_LE;
66 #endif
67 return arch;
68 }
69 #endif /* __ASM_SH_SYSCALL_32_H */
70