projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 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, | |
| cfb361f1 SL |
66 | unsigned long *args) |
| 67 | { | |
| b35f549d | 68 | ia64_syscall_get_set_arguments(task, regs, 0, 6, args, 0); |
| cfb361f1 SL |
69 | } |
| 70 | ||
| 71 | static inline void syscall_set_arguments(struct task_struct *task, | |
| 72 | struct pt_regs *regs, | |
| 73 | unsigned int i, unsigned int n, | |
| 74 | unsigned long *args) | |
| 75 | { | |
| cfb361f1 SL |
76 | BUG_ON(i + n > 6); |
| 77 | ||
| 78 | ia64_syscall_get_set_arguments(task, regs, i, n, args, 1); | |
| 79 | } | |
| ce5d1128 EP |
80 | |
| 81 | static inline int syscall_get_arch(void) | |
| 82 | { | |
| 83 | return AUDIT_ARCH_IA64; | |
| 84 | } | |
| cfb361f1 | 85 | #endif /* _ASM_SYSCALL_H */ |