1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-only */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Access to user system call parameters and results
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2008 Intel Corp. Shaohua Li <shaohua.li@intel.com>
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * See asm-generic/syscall.h for descriptions of what we must do here.
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #ifndef _ASM_SYSCALL_H
11*4882a593Smuzhiyun #define _ASM_SYSCALL_H 1
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun #include <uapi/linux/audit.h>
14*4882a593Smuzhiyun #include <linux/sched.h>
15*4882a593Smuzhiyun #include <linux/err.h>
16*4882a593Smuzhiyun
syscall_get_nr(struct task_struct * task,struct pt_regs * regs)17*4882a593Smuzhiyun static inline long syscall_get_nr(struct task_struct *task,
18*4882a593Smuzhiyun struct pt_regs *regs)
19*4882a593Smuzhiyun {
20*4882a593Smuzhiyun if ((long)regs->cr_ifs < 0) /* Not a syscall */
21*4882a593Smuzhiyun return -1;
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun return regs->r15;
24*4882a593Smuzhiyun }
25*4882a593Smuzhiyun
syscall_rollback(struct task_struct * task,struct pt_regs * regs)26*4882a593Smuzhiyun static inline void syscall_rollback(struct task_struct *task,
27*4882a593Smuzhiyun struct pt_regs *regs)
28*4882a593Smuzhiyun {
29*4882a593Smuzhiyun /* do nothing */
30*4882a593Smuzhiyun }
31*4882a593Smuzhiyun
syscall_get_error(struct task_struct * task,struct pt_regs * regs)32*4882a593Smuzhiyun static inline long syscall_get_error(struct task_struct *task,
33*4882a593Smuzhiyun struct pt_regs *regs)
34*4882a593Smuzhiyun {
35*4882a593Smuzhiyun return regs->r10 == -1 ? -regs->r8:0;
36*4882a593Smuzhiyun }
37*4882a593Smuzhiyun
syscall_get_return_value(struct task_struct * task,struct pt_regs * regs)38*4882a593Smuzhiyun static inline long syscall_get_return_value(struct task_struct *task,
39*4882a593Smuzhiyun struct pt_regs *regs)
40*4882a593Smuzhiyun {
41*4882a593Smuzhiyun return regs->r8;
42*4882a593Smuzhiyun }
43*4882a593Smuzhiyun
syscall_set_return_value(struct task_struct * task,struct pt_regs * regs,int error,long val)44*4882a593Smuzhiyun static inline void syscall_set_return_value(struct task_struct *task,
45*4882a593Smuzhiyun struct pt_regs *regs,
46*4882a593Smuzhiyun int error, long val)
47*4882a593Smuzhiyun {
48*4882a593Smuzhiyun if (error) {
49*4882a593Smuzhiyun /* error < 0, but ia64 uses > 0 return value */
50*4882a593Smuzhiyun regs->r8 = -error;
51*4882a593Smuzhiyun regs->r10 = -1;
52*4882a593Smuzhiyun } else {
53*4882a593Smuzhiyun regs->r8 = val;
54*4882a593Smuzhiyun regs->r10 = 0;
55*4882a593Smuzhiyun }
56*4882a593Smuzhiyun }
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun extern void ia64_syscall_get_set_arguments(struct task_struct *task,
59*4882a593Smuzhiyun struct pt_regs *regs, unsigned long *args, int rw);
syscall_get_arguments(struct task_struct * task,struct pt_regs * regs,unsigned long * args)60*4882a593Smuzhiyun static inline void syscall_get_arguments(struct task_struct *task,
61*4882a593Smuzhiyun struct pt_regs *regs,
62*4882a593Smuzhiyun unsigned long *args)
63*4882a593Smuzhiyun {
64*4882a593Smuzhiyun ia64_syscall_get_set_arguments(task, regs, args, 0);
65*4882a593Smuzhiyun }
66*4882a593Smuzhiyun
syscall_set_arguments(struct task_struct * task,struct pt_regs * regs,unsigned long * args)67*4882a593Smuzhiyun static inline void syscall_set_arguments(struct task_struct *task,
68*4882a593Smuzhiyun struct pt_regs *regs,
69*4882a593Smuzhiyun unsigned long *args)
70*4882a593Smuzhiyun {
71*4882a593Smuzhiyun ia64_syscall_get_set_arguments(task, regs, args, 1);
72*4882a593Smuzhiyun }
73*4882a593Smuzhiyun
syscall_get_arch(struct task_struct * task)74*4882a593Smuzhiyun static inline int syscall_get_arch(struct task_struct *task)
75*4882a593Smuzhiyun {
76*4882a593Smuzhiyun return AUDIT_ARCH_IA64;
77*4882a593Smuzhiyun }
78*4882a593Smuzhiyun #endif /* _ASM_SYSCALL_H */
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