1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
|
// Copyright (c) 2025 taitep
// SPDX-License-Identifier: BSD-2-Clause
//
// This file is part of TRVE (https://gitea.taitep.se/taitep/trve)
// See LICENSE file in the project root for full license text.
use int_enum::IntEnum;
use crate::consts::{Addr, DWord};
#[repr(u8)]
#[allow(dead_code)]
#[derive(Debug, Clone, Copy, PartialEq, Eq, IntEnum)]
pub enum ExceptionType {
InstructionAddressMisaligned = 0,
InstructionAccessFault = 1,
IllegalInstruction = 2,
Breakpoint = 3,
LoadAddressMisaligned = 4,
LoadAccessFault = 5,
StoreAmoAddressMisaligned = 6,
StoreAmoAccessFault = 7,
EnvironmentCallFromUMode = 8,
EnvironmentCallFromSMode = 9,
EnvironmentCallFromMMode = 11,
InstructionPageFault = 12,
LoadPageFault = 13,
StoreAmoPageFault = 15,
DoubleTrap = 16,
SoftwareCheck = 18,
HardwareError = 19,
}
#[derive(Debug, Clone, Copy)]
pub struct Exception {
pub type_: ExceptionType,
pub value: DWord,
}
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum MemoryExceptionType {
AddressMisaligned,
AccessFault,
PageFault,
}
#[derive(Debug, Clone, Copy)]
pub struct MemoryException {
pub type_: MemoryExceptionType,
pub addr: Addr,
}
impl MemoryException {
pub(crate) fn to_exception_store(&self) -> Exception {
Exception {
type_: match self.type_ {
MemoryExceptionType::AddressMisaligned => ExceptionType::StoreAmoAddressMisaligned,
MemoryExceptionType::AccessFault => ExceptionType::StoreAmoAccessFault,
MemoryExceptionType::PageFault => ExceptionType::StoreAmoPageFault,
},
value: self.addr,
}
}
pub(crate) fn to_exception_instr(&self) -> Exception {
Exception {
type_: match self.type_ {
MemoryExceptionType::AddressMisaligned => ExceptionType::InstructionAccessFault,
MemoryExceptionType::AccessFault => ExceptionType::InstructionAccessFault,
MemoryExceptionType::PageFault => ExceptionType::InstructionPageFault,
},
value: self.addr,
}
}
pub(crate) fn to_exception_load(&self) -> Exception {
Exception {
type_: match self.type_ {
MemoryExceptionType::AddressMisaligned => ExceptionType::LoadAddressMisaligned,
MemoryExceptionType::AccessFault => ExceptionType::LoadAccessFault,
MemoryExceptionType::PageFault => ExceptionType::LoadPageFault,
},
value: self.addr,
}
}
}
impl Into<MemoryExceptionType> for MemoryException {
fn into(self) -> MemoryExceptionType {
self.type_
}
}
impl Into<ExceptionType> for Exception {
fn into(self) -> ExceptionType {
self.type_
}
}
|
