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85 lines
2.0 KiB
85 lines
2.0 KiB
/* 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_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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