syscall.h 1.78 KB
Newer Older
1
/* SPDX-License-Identifier: GPL-2.0-only */
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
/*
 * Access to user system call parameters and results
 *
 * Copyright (C) 2008 Intel Corp.  Shaohua Li <shaohua.li@intel.com>
 *
 * See asm-generic/syscall.h for descriptions of what we must do here.
 */

#ifndef _ASM_SYSCALL_H
#define _ASM_SYSCALL_H	1

#include <uapi/linux/audit.h>
#include <linux/sched.h>
#include <linux/err.h>

static inline long syscall_get_nr(struct task_struct *task,
				  struct pt_regs *regs)
{
	if ((long)regs->cr_ifs < 0) /* Not a syscall */
		return -1;

	return regs->r15;
}

static inline void syscall_rollback(struct task_struct *task,
				    struct pt_regs *regs)
{
	/* do nothing */
}

static inline long syscall_get_error(struct task_struct *task,
				     struct pt_regs *regs)
{
35
	return regs->r10 == -1 ? -regs->r8:0;
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
}

static inline long syscall_get_return_value(struct task_struct *task,
					    struct pt_regs *regs)
{
	return regs->r8;
}

static inline void syscall_set_return_value(struct task_struct *task,
					    struct pt_regs *regs,
					    int error, long val)
{
	if (error) {
		/* error < 0, but ia64 uses > 0 return value */
		regs->r8 = -error;
		regs->r10 = -1;
	} else {
		regs->r8 = val;
		regs->r10 = 0;
	}
}

extern void ia64_syscall_get_set_arguments(struct task_struct *task,
59
	struct pt_regs *regs, unsigned long *args, int rw);
60
61
62
63
static inline void syscall_get_arguments(struct task_struct *task,
					 struct pt_regs *regs,
					 unsigned long *args)
{
64
	ia64_syscall_get_set_arguments(task, regs, args, 0);
65
66
67
68
69
70
}

static inline void syscall_set_arguments(struct task_struct *task,
					 struct pt_regs *regs,
					 unsigned long *args)
{
71
	ia64_syscall_get_set_arguments(task, regs, args, 1);
72
73
}

74
static inline int syscall_get_arch(struct task_struct *task)
75
76
77
78
{
	return AUDIT_ARCH_IA64;
}
#endif	/* _ASM_SYSCALL_H */