1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * This file is subject to the terms and conditions of the GNU General Public
3*4882a593Smuzhiyun * License. See the file "COPYING" in the main directory of this archive
4*4882a593Smuzhiyun * for more details.
5*4882a593Smuzhiyun *
6*4882a593Smuzhiyun * Copyright (C) 2001 - 2007 Tensilica Inc.
7*4882a593Smuzhiyun * Copyright (C) 2018 Cadence Design Systems Inc.
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #ifndef _ASM_SYSCALL_H
11*4882a593Smuzhiyun #define _ASM_SYSCALL_H
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun #include <linux/err.h>
14*4882a593Smuzhiyun #include <asm/ptrace.h>
15*4882a593Smuzhiyun #include <uapi/linux/audit.h>
16*4882a593Smuzhiyun
syscall_get_arch(struct task_struct * task)17*4882a593Smuzhiyun static inline int syscall_get_arch(struct task_struct *task)
18*4882a593Smuzhiyun {
19*4882a593Smuzhiyun return AUDIT_ARCH_XTENSA;
20*4882a593Smuzhiyun }
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun typedef void (*syscall_t)(void);
23*4882a593Smuzhiyun extern syscall_t sys_call_table[];
24*4882a593Smuzhiyun
syscall_get_nr(struct task_struct * task,struct pt_regs * regs)25*4882a593Smuzhiyun static inline long syscall_get_nr(struct task_struct *task,
26*4882a593Smuzhiyun struct pt_regs *regs)
27*4882a593Smuzhiyun {
28*4882a593Smuzhiyun return regs->syscall;
29*4882a593Smuzhiyun }
30*4882a593Smuzhiyun
syscall_rollback(struct task_struct * task,struct pt_regs * regs)31*4882a593Smuzhiyun static inline void syscall_rollback(struct task_struct *task,
32*4882a593Smuzhiyun struct pt_regs *regs)
33*4882a593Smuzhiyun {
34*4882a593Smuzhiyun /* Do nothing. */
35*4882a593Smuzhiyun }
36*4882a593Smuzhiyun
syscall_get_error(struct task_struct * task,struct pt_regs * regs)37*4882a593Smuzhiyun static inline long syscall_get_error(struct task_struct *task,
38*4882a593Smuzhiyun struct pt_regs *regs)
39*4882a593Smuzhiyun {
40*4882a593Smuzhiyun /* 0 if syscall succeeded, otherwise -Errorcode */
41*4882a593Smuzhiyun return IS_ERR_VALUE(regs->areg[2]) ? regs->areg[2] : 0;
42*4882a593Smuzhiyun }
43*4882a593Smuzhiyun
syscall_get_return_value(struct task_struct * task,struct pt_regs * regs)44*4882a593Smuzhiyun static inline long syscall_get_return_value(struct task_struct *task,
45*4882a593Smuzhiyun struct pt_regs *regs)
46*4882a593Smuzhiyun {
47*4882a593Smuzhiyun return regs->areg[2];
48*4882a593Smuzhiyun }
49*4882a593Smuzhiyun
syscall_set_return_value(struct task_struct * task,struct pt_regs * regs,int error,long val)50*4882a593Smuzhiyun static inline void syscall_set_return_value(struct task_struct *task,
51*4882a593Smuzhiyun struct pt_regs *regs,
52*4882a593Smuzhiyun int error, long val)
53*4882a593Smuzhiyun {
54*4882a593Smuzhiyun regs->areg[2] = (long) error ? error : val;
55*4882a593Smuzhiyun }
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun #define SYSCALL_MAX_ARGS 6
58*4882a593Smuzhiyun #define XTENSA_SYSCALL_ARGUMENT_REGS {6, 3, 4, 5, 8, 9}
59*4882a593Smuzhiyun
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 static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS;
65*4882a593Smuzhiyun unsigned int i;
66*4882a593Smuzhiyun
67*4882a593Smuzhiyun for (i = 0; i < 6; ++i)
68*4882a593Smuzhiyun args[i] = regs->areg[reg[i]];
69*4882a593Smuzhiyun }
70*4882a593Smuzhiyun
syscall_set_arguments(struct task_struct * task,struct pt_regs * regs,const unsigned long * args)71*4882a593Smuzhiyun static inline void syscall_set_arguments(struct task_struct *task,
72*4882a593Smuzhiyun struct pt_regs *regs,
73*4882a593Smuzhiyun const unsigned long *args)
74*4882a593Smuzhiyun {
75*4882a593Smuzhiyun static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS;
76*4882a593Smuzhiyun unsigned int i;
77*4882a593Smuzhiyun
78*4882a593Smuzhiyun for (i = 0; i < 6; ++i)
79*4882a593Smuzhiyun regs->areg[reg[i]] = args[i];
80*4882a593Smuzhiyun }
81*4882a593Smuzhiyun
82*4882a593Smuzhiyun asmlinkage long xtensa_rt_sigreturn(void);
83*4882a593Smuzhiyun asmlinkage long xtensa_shmat(int, char __user *, int);
84*4882a593Smuzhiyun asmlinkage long xtensa_fadvise64_64(int, int,
85*4882a593Smuzhiyun unsigned long long, unsigned long long);
86*4882a593Smuzhiyun
87*4882a593Smuzhiyun #endif
88