93 строки
2.1 KiB
C
93 строки
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2008-2009 Red Hat, Inc. All rights reserved.
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* Copyright 2010 Tilera Corporation. All Rights Reserved.
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* Copyright 2015 Regents of the University of California, Berkeley
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*
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* See asm-generic/syscall.h for descriptions of what we must do here.
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*/
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#ifndef _ASM_RISCV_SYSCALL_H
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#define _ASM_RISCV_SYSCALL_H
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#include <uapi/linux/audit.h>
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#include <linux/sched.h>
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#include <linux/err.h>
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/* The array of function pointers for syscalls. */
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extern void *sys_call_table[];
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/*
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* Only the low 32 bits of orig_r0 are meaningful, so we return int.
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* This importantly ignores the high bits on 64-bit, so comparisons
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* sign-extend the low 32 bits.
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*/
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static inline int syscall_get_nr(struct task_struct *task,
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struct pt_regs *regs)
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{
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return regs->a7;
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}
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static inline void syscall_set_nr(struct task_struct *task,
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struct pt_regs *regs,
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int sysno)
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{
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regs->a7 = sysno;
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}
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static inline void syscall_rollback(struct task_struct *task,
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struct pt_regs *regs)
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{
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regs->a0 = regs->orig_a0;
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}
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static inline long syscall_get_error(struct task_struct *task,
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struct pt_regs *regs)
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{
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unsigned long error = regs->a0;
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return IS_ERR_VALUE(error) ? error : 0;
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}
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static inline long syscall_get_return_value(struct task_struct *task,
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struct pt_regs *regs)
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{
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return regs->a0;
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}
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static inline void syscall_set_return_value(struct task_struct *task,
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struct pt_regs *regs,
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int error, long val)
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{
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regs->a0 = (long) error ?: val;
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}
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static inline void syscall_get_arguments(struct task_struct *task,
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struct pt_regs *regs,
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unsigned long *args)
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{
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args[0] = regs->orig_a0;
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args++;
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memcpy(args, ®s->a1, 5 * sizeof(args[0]));
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}
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static inline void syscall_set_arguments(struct task_struct *task,
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struct pt_regs *regs,
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const unsigned long *args)
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{
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regs->orig_a0 = args[0];
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args++;
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memcpy(®s->a1, args, 5 * sizeof(regs->a1));
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}
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static inline int syscall_get_arch(struct task_struct *task)
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{
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#ifdef CONFIG_64BIT
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return AUDIT_ARCH_RISCV64;
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#else
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return AUDIT_ARCH_RISCV32;
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#endif
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}
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#endif /* _ASM_RISCV_SYSCALL_H */
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