1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun #ifndef __ASM_MICROBLAZE_SYSCALL_H
3*4882a593Smuzhiyun #define __ASM_MICROBLAZE_SYSCALL_H
4*4882a593Smuzhiyun
5*4882a593Smuzhiyun #include <uapi/linux/audit.h>
6*4882a593Smuzhiyun #include <linux/kernel.h>
7*4882a593Smuzhiyun #include <linux/sched.h>
8*4882a593Smuzhiyun #include <asm/ptrace.h>
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun /* The system call number is given by the user in R12 */
syscall_get_nr(struct task_struct * task,struct pt_regs * regs)11*4882a593Smuzhiyun static inline long syscall_get_nr(struct task_struct *task,
12*4882a593Smuzhiyun struct pt_regs *regs)
13*4882a593Smuzhiyun {
14*4882a593Smuzhiyun return regs->r12;
15*4882a593Smuzhiyun }
16*4882a593Smuzhiyun
syscall_rollback(struct task_struct * task,struct pt_regs * regs)17*4882a593Smuzhiyun static inline void syscall_rollback(struct task_struct *task,
18*4882a593Smuzhiyun struct pt_regs *regs)
19*4882a593Smuzhiyun {
20*4882a593Smuzhiyun /* TODO. */
21*4882a593Smuzhiyun }
22*4882a593Smuzhiyun
syscall_get_error(struct task_struct * task,struct pt_regs * regs)23*4882a593Smuzhiyun static inline long syscall_get_error(struct task_struct *task,
24*4882a593Smuzhiyun struct pt_regs *regs)
25*4882a593Smuzhiyun {
26*4882a593Smuzhiyun return IS_ERR_VALUE(regs->r3) ? regs->r3 : 0;
27*4882a593Smuzhiyun }
28*4882a593Smuzhiyun
syscall_get_return_value(struct task_struct * task,struct pt_regs * regs)29*4882a593Smuzhiyun static inline long syscall_get_return_value(struct task_struct *task,
30*4882a593Smuzhiyun struct pt_regs *regs)
31*4882a593Smuzhiyun {
32*4882a593Smuzhiyun return regs->r3;
33*4882a593Smuzhiyun }
34*4882a593Smuzhiyun
syscall_set_return_value(struct task_struct * task,struct pt_regs * regs,int error,long val)35*4882a593Smuzhiyun static inline void syscall_set_return_value(struct task_struct *task,
36*4882a593Smuzhiyun struct pt_regs *regs,
37*4882a593Smuzhiyun int error, long val)
38*4882a593Smuzhiyun {
39*4882a593Smuzhiyun if (error)
40*4882a593Smuzhiyun regs->r3 = -error;
41*4882a593Smuzhiyun else
42*4882a593Smuzhiyun regs->r3 = val;
43*4882a593Smuzhiyun }
44*4882a593Smuzhiyun
microblaze_get_syscall_arg(struct pt_regs * regs,unsigned int n)45*4882a593Smuzhiyun static inline microblaze_reg_t microblaze_get_syscall_arg(struct pt_regs *regs,
46*4882a593Smuzhiyun unsigned int n)
47*4882a593Smuzhiyun {
48*4882a593Smuzhiyun switch (n) {
49*4882a593Smuzhiyun case 5: return regs->r10;
50*4882a593Smuzhiyun case 4: return regs->r9;
51*4882a593Smuzhiyun case 3: return regs->r8;
52*4882a593Smuzhiyun case 2: return regs->r7;
53*4882a593Smuzhiyun case 1: return regs->r6;
54*4882a593Smuzhiyun case 0: return regs->r5;
55*4882a593Smuzhiyun default:
56*4882a593Smuzhiyun BUG();
57*4882a593Smuzhiyun }
58*4882a593Smuzhiyun return ~0;
59*4882a593Smuzhiyun }
60*4882a593Smuzhiyun
microblaze_set_syscall_arg(struct pt_regs * regs,unsigned int n,unsigned long val)61*4882a593Smuzhiyun static inline void microblaze_set_syscall_arg(struct pt_regs *regs,
62*4882a593Smuzhiyun unsigned int n,
63*4882a593Smuzhiyun unsigned long val)
64*4882a593Smuzhiyun {
65*4882a593Smuzhiyun switch (n) {
66*4882a593Smuzhiyun case 5:
67*4882a593Smuzhiyun regs->r10 = val;
68*4882a593Smuzhiyun case 4:
69*4882a593Smuzhiyun regs->r9 = val;
70*4882a593Smuzhiyun case 3:
71*4882a593Smuzhiyun regs->r8 = val;
72*4882a593Smuzhiyun case 2:
73*4882a593Smuzhiyun regs->r7 = val;
74*4882a593Smuzhiyun case 1:
75*4882a593Smuzhiyun regs->r6 = val;
76*4882a593Smuzhiyun case 0:
77*4882a593Smuzhiyun regs->r5 = val;
78*4882a593Smuzhiyun default:
79*4882a593Smuzhiyun BUG();
80*4882a593Smuzhiyun }
81*4882a593Smuzhiyun }
82*4882a593Smuzhiyun
syscall_get_arguments(struct task_struct * task,struct pt_regs * regs,unsigned long * args)83*4882a593Smuzhiyun static inline void syscall_get_arguments(struct task_struct *task,
84*4882a593Smuzhiyun struct pt_regs *regs,
85*4882a593Smuzhiyun unsigned long *args)
86*4882a593Smuzhiyun {
87*4882a593Smuzhiyun unsigned int i = 0;
88*4882a593Smuzhiyun unsigned int n = 6;
89*4882a593Smuzhiyun
90*4882a593Smuzhiyun while (n--)
91*4882a593Smuzhiyun *args++ = microblaze_get_syscall_arg(regs, i++);
92*4882a593Smuzhiyun }
93*4882a593Smuzhiyun
syscall_set_arguments(struct task_struct * task,struct pt_regs * regs,const unsigned long * args)94*4882a593Smuzhiyun static inline void syscall_set_arguments(struct task_struct *task,
95*4882a593Smuzhiyun struct pt_regs *regs,
96*4882a593Smuzhiyun const unsigned long *args)
97*4882a593Smuzhiyun {
98*4882a593Smuzhiyun unsigned int i = 0;
99*4882a593Smuzhiyun unsigned int n = 6;
100*4882a593Smuzhiyun
101*4882a593Smuzhiyun while (n--)
102*4882a593Smuzhiyun microblaze_set_syscall_arg(regs, i++, *args++);
103*4882a593Smuzhiyun }
104*4882a593Smuzhiyun
105*4882a593Smuzhiyun asmlinkage unsigned long do_syscall_trace_enter(struct pt_regs *regs);
106*4882a593Smuzhiyun asmlinkage void do_syscall_trace_leave(struct pt_regs *regs);
107*4882a593Smuzhiyun
syscall_get_arch(struct task_struct * task)108*4882a593Smuzhiyun static inline int syscall_get_arch(struct task_struct *task)
109*4882a593Smuzhiyun {
110*4882a593Smuzhiyun return AUDIT_ARCH_MICROBLAZE;
111*4882a593Smuzhiyun }
112*4882a593Smuzhiyun #endif /* __ASM_MICROBLAZE_SYSCALL_H */
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