1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (C) 2008-2009 Red Hat, Inc. All rights reserved.
4 * Copyright 2010 Tilera Corporation. All Rights Reserved.
5 * Copyright 2015 Regents of the University of California, Berkeley
7 * See asm-generic/syscall.h for descriptions of what we must do here.
10 #ifndef _ASM_RISCV_SYSCALL_H
11 #define _ASM_RISCV_SYSCALL_H
13 #include <uapi/linux/audit.h>
14 #include <linux/sched.h>
15 #include <linux/err.h>
17 /* The array of function pointers for syscalls. */
18 extern void *sys_call_table[];
21 * Only the low 32 bits of orig_r0 are meaningful, so we return int.
22 * This importantly ignores the high bits on 64-bit, so comparisons
23 * sign-extend the low 32 bits.
25 static inline int syscall_get_nr(struct task_struct *task,
31 static inline void syscall_set_nr(struct task_struct *task,
38 static inline void syscall_rollback(struct task_struct *task,
41 regs->a0 = regs->orig_a0;
44 static inline long syscall_get_error(struct task_struct *task,
47 unsigned long error = regs->a0;
49 return IS_ERR_VALUE(error) ? error : 0;
52 static inline long syscall_get_return_value(struct task_struct *task,
58 static inline void syscall_set_return_value(struct task_struct *task,
62 regs->a0 = (long) error ?: val;
65 static inline void syscall_get_arguments(struct task_struct *task,
69 args[0] = regs->orig_a0;
71 memcpy(args, ®s->a1, 5 * sizeof(args[0]));
74 static inline void syscall_set_arguments(struct task_struct *task,
76 const unsigned long *args)
78 regs->orig_a0 = args[0];
80 memcpy(®s->a1, args, 5 * sizeof(regs->a1));
83 static inline int syscall_get_arch(struct task_struct *task)
86 return AUDIT_ARCH_RISCV64;
88 return AUDIT_ARCH_RISCV32;
92 #endif /* _ASM_RISCV_SYSCALL_H */