Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 2001 - 2007 Tensilica Inc.
7 * Copyright (C) 2018 Cadence Design Systems Inc.
8 */
9
10#ifndef _ASM_SYSCALL_H
11#define _ASM_SYSCALL_H
12
13#include <linux/err.h>
14#include <asm/ptrace.h>
15#include <uapi/linux/audit.h>
16
17static inline int syscall_get_arch(struct task_struct *task)
18{
19 return AUDIT_ARCH_XTENSA;
20}
21
22typedef void (*syscall_t)(void);
23extern syscall_t sys_call_table[];
24
25static inline long syscall_get_nr(struct task_struct *task,
26 struct pt_regs *regs)
27{
28 return regs->syscall;
29}
30
31static inline void syscall_set_nr(struct task_struct *task,
32 struct pt_regs *regs,
33 int nr)
34{
35 regs->syscall = nr;
36}
37
38static inline void syscall_rollback(struct task_struct *task,
39 struct pt_regs *regs)
40{
41 /* Do nothing. */
42}
43
44static inline long syscall_get_error(struct task_struct *task,
45 struct pt_regs *regs)
46{
47 /* 0 if syscall succeeded, otherwise -Errorcode */
48 return IS_ERR_VALUE(regs->areg[2]) ? regs->areg[2] : 0;
49}
50
51static inline long syscall_get_return_value(struct task_struct *task,
52 struct pt_regs *regs)
53{
54 return regs->areg[2];
55}
56
57static inline void syscall_set_return_value(struct task_struct *task,
58 struct pt_regs *regs,
59 int error, long val)
60{
61 regs->areg[2] = (long) error ? error : val;
62}
63
64#define SYSCALL_MAX_ARGS 6
65#define XTENSA_SYSCALL_ARGUMENT_REGS {6, 3, 4, 5, 8, 9}
66
67static inline void syscall_get_arguments(struct task_struct *task,
68 struct pt_regs *regs,
69 unsigned long *args)
70{
71 static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS;
72 unsigned int i;
73
74 for (i = 0; i < 6; ++i)
75 args[i] = regs->areg[reg[i]];
76}
77
78static inline void syscall_set_arguments(struct task_struct *task,
79 struct pt_regs *regs,
80 const unsigned long *args)
81{
82 static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS;
83 unsigned int i;
84
85 for (i = 0; i < 6; ++i)
86 regs->areg[reg[i]] = args[i];
87}
88
89asmlinkage long xtensa_rt_sigreturn(void);
90asmlinkage long xtensa_shmat(int, char __user *, int);
91asmlinkage long xtensa_fadvise64_64(int, int,
92 unsigned long long, unsigned long long);
93
94#endif