Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
d5b37092 MS |
2 | #ifndef __ASM_MICROBLAZE_SYSCALL_H |
3 | #define __ASM_MICROBLAZE_SYSCALL_H | |
4 | ||
ce5d1128 | 5 | #include <uapi/linux/audit.h> |
d5b37092 MS |
6 | #include <linux/kernel.h> |
7 | #include <linux/sched.h> | |
8 | #include <asm/ptrace.h> | |
9 | ||
10 | /* The system call number is given by the user in R12 */ | |
11 | static inline long syscall_get_nr(struct task_struct *task, | |
12 | struct pt_regs *regs) | |
13 | { | |
14 | return regs->r12; | |
15 | } | |
16 | ||
17 | static inline void syscall_rollback(struct task_struct *task, | |
18 | struct pt_regs *regs) | |
19 | { | |
20 | /* TODO. */ | |
21 | } | |
22 | ||
23 | static inline long syscall_get_error(struct task_struct *task, | |
24 | struct pt_regs *regs) | |
25 | { | |
26 | return IS_ERR_VALUE(regs->r3) ? regs->r3 : 0; | |
27 | } | |
28 | ||
29 | static inline long syscall_get_return_value(struct task_struct *task, | |
30 | struct pt_regs *regs) | |
31 | { | |
32 | return regs->r3; | |
33 | } | |
34 | ||
35 | static inline void syscall_set_return_value(struct task_struct *task, | |
36 | struct pt_regs *regs, | |
37 | int error, long val) | |
38 | { | |
39 | if (error) | |
40 | regs->r3 = -error; | |
41 | else | |
42 | regs->r3 = val; | |
43 | } | |
44 | ||
45 | static inline microblaze_reg_t microblaze_get_syscall_arg(struct pt_regs *regs, | |
46 | unsigned int n) | |
47 | { | |
48 | switch (n) { | |
49 | case 5: return regs->r10; | |
50 | case 4: return regs->r9; | |
51 | case 3: return regs->r8; | |
52 | case 2: return regs->r7; | |
53 | case 1: return regs->r6; | |
54 | case 0: return regs->r5; | |
55 | default: | |
56 | BUG(); | |
57 | } | |
58 | return ~0; | |
59 | } | |
60 | ||
d5b37092 MS |
61 | static inline void syscall_get_arguments(struct task_struct *task, |
62 | struct pt_regs *regs, | |
d5b37092 MS |
63 | unsigned long *args) |
64 | { | |
b35f549d SRRH |
65 | unsigned int i = 0; |
66 | unsigned int n = 6; | |
67 | ||
d5b37092 MS |
68 | while (n--) |
69 | *args++ = microblaze_get_syscall_arg(regs, i++); | |
70 | } | |
71 | ||
8543e6c9 | 72 | asmlinkage unsigned long do_syscall_trace_enter(struct pt_regs *regs); |
c1df53b3 MS |
73 | asmlinkage void do_syscall_trace_leave(struct pt_regs *regs); |
74 | ||
16add411 | 75 | static inline int syscall_get_arch(struct task_struct *task) |
ce5d1128 EP |
76 | { |
77 | return AUDIT_ARCH_MICROBLAZE; | |
78 | } | |
d5b37092 | 79 | #endif /* __ASM_MICROBLAZE_SYSCALL_H */ |