1*be769645SHuacai Chen /* SPDX-License-Identifier: GPL-2.0+ */
2*be769645SHuacai Chen /*
3*be769645SHuacai Chen * Author: Hanlu Li <lihanlu@loongson.cn>
4*be769645SHuacai Chen * Huacai Chen <chenhuacai@loongson.cn>
5*be769645SHuacai Chen *
6*be769645SHuacai Chen * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
7*be769645SHuacai Chen */
8*be769645SHuacai Chen
9*be769645SHuacai Chen #ifndef __ASM_LOONGARCH_SYSCALL_H
10*be769645SHuacai Chen #define __ASM_LOONGARCH_SYSCALL_H
11*be769645SHuacai Chen
12*be769645SHuacai Chen #include <linux/compiler.h>
13*be769645SHuacai Chen #include <uapi/linux/audit.h>
14*be769645SHuacai Chen #include <linux/elf-em.h>
15*be769645SHuacai Chen #include <linux/kernel.h>
16*be769645SHuacai Chen #include <linux/sched.h>
17*be769645SHuacai Chen #include <linux/uaccess.h>
18*be769645SHuacai Chen #include <asm/ptrace.h>
19*be769645SHuacai Chen #include <asm/unistd.h>
20*be769645SHuacai Chen
21*be769645SHuacai Chen extern void *sys_call_table[];
22*be769645SHuacai Chen
syscall_get_nr(struct task_struct * task,struct pt_regs * regs)23*be769645SHuacai Chen static inline long syscall_get_nr(struct task_struct *task,
24*be769645SHuacai Chen struct pt_regs *regs)
25*be769645SHuacai Chen {
26*be769645SHuacai Chen return regs->regs[11];
27*be769645SHuacai Chen }
28*be769645SHuacai Chen
syscall_rollback(struct task_struct * task,struct pt_regs * regs)29*be769645SHuacai Chen static inline void syscall_rollback(struct task_struct *task,
30*be769645SHuacai Chen struct pt_regs *regs)
31*be769645SHuacai Chen {
32*be769645SHuacai Chen regs->regs[4] = regs->orig_a0;
33*be769645SHuacai Chen }
34*be769645SHuacai Chen
syscall_get_error(struct task_struct * task,struct pt_regs * regs)35*be769645SHuacai Chen static inline long syscall_get_error(struct task_struct *task,
36*be769645SHuacai Chen struct pt_regs *regs)
37*be769645SHuacai Chen {
38*be769645SHuacai Chen unsigned long error = regs->regs[4];
39*be769645SHuacai Chen
40*be769645SHuacai Chen return IS_ERR_VALUE(error) ? error : 0;
41*be769645SHuacai Chen }
42*be769645SHuacai Chen
syscall_get_return_value(struct task_struct * task,struct pt_regs * regs)43*be769645SHuacai Chen static inline long syscall_get_return_value(struct task_struct *task,
44*be769645SHuacai Chen struct pt_regs *regs)
45*be769645SHuacai Chen {
46*be769645SHuacai Chen return regs->regs[4];
47*be769645SHuacai Chen }
48*be769645SHuacai Chen
syscall_set_return_value(struct task_struct * task,struct pt_regs * regs,int error,long val)49*be769645SHuacai Chen static inline void syscall_set_return_value(struct task_struct *task,
50*be769645SHuacai Chen struct pt_regs *regs,
51*be769645SHuacai Chen int error, long val)
52*be769645SHuacai Chen {
53*be769645SHuacai Chen regs->regs[4] = (long) error ? error : val;
54*be769645SHuacai Chen }
55*be769645SHuacai Chen
syscall_get_arguments(struct task_struct * task,struct pt_regs * regs,unsigned long * args)56*be769645SHuacai Chen static inline void syscall_get_arguments(struct task_struct *task,
57*be769645SHuacai Chen struct pt_regs *regs,
58*be769645SHuacai Chen unsigned long *args)
59*be769645SHuacai Chen {
60*be769645SHuacai Chen args[0] = regs->orig_a0;
61*be769645SHuacai Chen memcpy(&args[1], ®s->regs[5], 5 * sizeof(long));
62*be769645SHuacai Chen }
63*be769645SHuacai Chen
syscall_get_arch(struct task_struct * task)64*be769645SHuacai Chen static inline int syscall_get_arch(struct task_struct *task)
65*be769645SHuacai Chen {
66*be769645SHuacai Chen return AUDIT_ARCH_LOONGARCH64;
67*be769645SHuacai Chen }
68*be769645SHuacai Chen
arch_syscall_is_vdso_sigreturn(struct pt_regs * regs)69*be769645SHuacai Chen static inline bool arch_syscall_is_vdso_sigreturn(struct pt_regs *regs)
70*be769645SHuacai Chen {
71*be769645SHuacai Chen return false;
72*be769645SHuacai Chen }
73*be769645SHuacai Chen
74*be769645SHuacai Chen #endif /* __ASM_LOONGARCH_SYSCALL_H */
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