1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Access to user system call parameters and results
*
* See asm-generic/syscall.h for descriptions of what we must do here.
*/
#ifndef _ASM_ARM_SYSCALL_H
#define _ASM_ARM_SYSCALL_H
#include <uapi/linux/audit.h> /* for AUDIT_ARCH_* */
#include <linux/elf.h> /* for ELF_EM */
#include <linux/err.h>
#include <linux/sched.h>
#include <asm/unistd.h>
#define NR_syscalls (__NR_syscalls)
extern const unsigned long sys_call_table[];
static inline int syscall_get_nr(struct task_struct *task,
struct pt_regs *regs)
{
if (IS_ENABLED(CONFIG_AEABI) && !IS_ENABLED(CONFIG_OABI_COMPAT))
return task_thread_info(task)->abi_syscall;
return task_thread_info(task)->abi_syscall & __NR_SYSCALL_MASK;
}
static inline bool __in_oabi_syscall(struct task_struct *task)
{
return IS_ENABLED(CONFIG_OABI_COMPAT) &&
(task_thread_info(task)->abi_syscall & __NR_OABI_SYSCALL_BASE);
}
static inline bool in_oabi_syscall(void)
{
return __in_oabi_syscall(current);
}
static inline void syscall_rollback(struct task_struct *task,
struct pt_regs *regs)
{
regs->ARM_r0 = regs->ARM_ORIG_r0;
}
static inline long syscall_get_error(struct task_struct *task,
struct pt_regs *regs)
{
unsigned long error = regs->ARM_r0;
return IS_ERR_VALUE(error) ? error : 0;
}
static inline long syscall_get_return_value(struct task_struct *task,
struct pt_regs *regs)
{
return regs->ARM_r0;
}
static inline void syscall_set_return_value(struct task_struct *task,
struct pt_regs *regs,
int error, long val)
{
regs->ARM_r0 = (long) error ? error : val;
}
#define SYSCALL_MAX_ARGS 7
static inline void syscall_get_arguments(struct task_struct *task,
struct pt_regs *regs,
unsigned long *args)
{
args[0] = regs->ARM_ORIG_r0;
args++;
memcpy(args, ®s->ARM_r0 + 1, 5 * sizeof(args[0]));
}
static inline void syscall_set_arguments(struct task_struct *task,
struct pt_regs *regs,
const unsigned long *args)
{
regs->ARM_ORIG_r0 = args[0];
args++;
memcpy(®s->ARM_r0 + 1, args, 5 * sizeof(args[0]));
}
static inline int syscall_get_arch(struct task_struct *task)
{
/* ARM tasks don't change audit architectures on the fly. */
return AUDIT_ARCH_ARM;
}
#endif /* _ASM_ARM_SYSCALL_H */
|
