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10#ifndef _ASM_SYSCALL_H
11#define _ASM_SYSCALL_H
12
13#include <linux/err.h>
14#include <asm/ptrace.h>
15#include <uapi/linux/audit.h>
16
17static inline int syscall_get_arch(struct task_struct *task)
18{
19 return AUDIT_ARCH_XTENSA;
20}
21
22typedef void (*syscall_t)(void);
23extern syscall_t sys_call_table[];
24
25static inline long syscall_get_nr(struct task_struct *task,
26 struct pt_regs *regs)
27{
28 return regs->syscall;
29}
30
31static inline void syscall_rollback(struct task_struct *task,
32 struct pt_regs *regs)
33{
34
35}
36
37static inline long syscall_get_error(struct task_struct *task,
38 struct pt_regs *regs)
39{
40
41 return IS_ERR_VALUE(regs->areg[2]) ? regs->areg[2] : 0;
42}
43
44static inline long syscall_get_return_value(struct task_struct *task,
45 struct pt_regs *regs)
46{
47 return regs->areg[2];
48}
49
50static inline void syscall_set_return_value(struct task_struct *task,
51 struct pt_regs *regs,
52 int error, long val)
53{
54 regs->areg[2] = (long) error ? error : val;
55}
56
57#define SYSCALL_MAX_ARGS 6
58#define XTENSA_SYSCALL_ARGUMENT_REGS {6, 3, 4, 5, 8, 9}
59
60static inline void syscall_get_arguments(struct task_struct *task,
61 struct pt_regs *regs,
62 unsigned long *args)
63{
64 static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS;
65 unsigned int i;
66
67 for (i = 0; i < 6; ++i)
68 args[i] = regs->areg[reg[i]];
69}
70
71static inline void syscall_set_arguments(struct task_struct *task,
72 struct pt_regs *regs,
73 const unsigned long *args)
74{
75 static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS;
76 unsigned int i;
77
78 for (i = 0; i < 6; ++i)
79 regs->areg[reg[i]] = args[i];
80}
81
82asmlinkage long xtensa_rt_sigreturn(void);
83asmlinkage long xtensa_shmat(int, char __user *, int);
84asmlinkage long xtensa_fadvise64_64(int, int,
85 unsigned long long, unsigned long long);
86
87#endif
88