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cfb361f1 SL |
1 | /* |
2 | * Access to user system call parameters and results | |
3 | * | |
4 | * Copyright (C) 2008 Intel Corp. Shaohua Li <shaohua.li@intel.com> | |
5 | * | |
6 | * This copyrighted material is made available to anyone wishing to use, | |
7 | * modify, copy, or redistribute it subject to the terms and conditions | |
8 | * of the GNU General Public License v.2. | |
9 | * | |
10 | * See asm-generic/syscall.h for descriptions of what we must do here. | |
11 | */ | |
12 | ||
13 | #ifndef _ASM_SYSCALL_H | |
14 | #define _ASM_SYSCALL_H 1 | |
15 | ||
ce5d1128 | 16 | #include <uapi/linux/audit.h> |
cfb361f1 SL |
17 | #include <linux/sched.h> |
18 | #include <linux/err.h> | |
19 | ||
20 | static inline long syscall_get_nr(struct task_struct *task, | |
21 | struct pt_regs *regs) | |
22 | { | |
cfb361f1 SL |
23 | if ((long)regs->cr_ifs < 0) /* Not a syscall */ |
24 | return -1; | |
680973ed | 25 | |
cfb361f1 SL |
26 | return regs->r15; |
27 | } | |
28 | ||
29 | static inline void syscall_rollback(struct task_struct *task, | |
30 | struct pt_regs *regs) | |
31 | { | |
cfb361f1 SL |
32 | /* do nothing */ |
33 | } | |
34 | ||
35 | static inline long syscall_get_error(struct task_struct *task, | |
36 | struct pt_regs *regs) | |
37 | { | |
cfb361f1 SL |
38 | return regs->r10 == -1 ? regs->r8:0; |
39 | } | |
40 | ||
41 | static inline long syscall_get_return_value(struct task_struct *task, | |
42 | struct pt_regs *regs) | |
43 | { | |
cfb361f1 SL |
44 | return regs->r8; |
45 | } | |
46 | ||
47 | static inline void syscall_set_return_value(struct task_struct *task, | |
48 | struct pt_regs *regs, | |
49 | int error, long val) | |
50 | { | |
cfb361f1 SL |
51 | if (error) { |
52 | /* error < 0, but ia64 uses > 0 return value */ | |
53 | regs->r8 = -error; | |
54 | regs->r10 = -1; | |
55 | } else { | |
56 | regs->r8 = val; | |
57 | regs->r10 = 0; | |
58 | } | |
59 | } | |
60 | ||
61 | extern void ia64_syscall_get_set_arguments(struct task_struct *task, | |
62 | struct pt_regs *regs, unsigned int i, unsigned int n, | |
63 | unsigned long *args, int rw); | |
64 | static inline void syscall_get_arguments(struct task_struct *task, | |
65 | struct pt_regs *regs, | |
66 | unsigned int i, unsigned int n, | |
67 | unsigned long *args) | |
68 | { | |
cfb361f1 SL |
69 | BUG_ON(i + n > 6); |
70 | ||
71 | ia64_syscall_get_set_arguments(task, regs, i, n, args, 0); | |
72 | } | |
73 | ||
74 | static inline void syscall_set_arguments(struct task_struct *task, | |
75 | struct pt_regs *regs, | |
76 | unsigned int i, unsigned int n, | |
77 | unsigned long *args) | |
78 | { | |
cfb361f1 SL |
79 | BUG_ON(i + n > 6); |
80 | ||
81 | ia64_syscall_get_set_arguments(task, regs, i, n, args, 1); | |
82 | } | |
ce5d1128 EP |
83 | |
84 | static inline int syscall_get_arch(void) | |
85 | { | |
86 | return AUDIT_ARCH_IA64; | |
87 | } | |
cfb361f1 | 88 | #endif /* _ASM_SYSCALL_H */ |