forked from encounter/objdiff
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathdisplay.rs
More file actions
137 lines (129 loc) · 4.14 KB
/
display.rs
File metadata and controls
137 lines (129 loc) · 4.14 KB
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
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
use std::cmp::Ordering;
use crate::{
diff::{ObjInsArgDiff, ObjInsDiff},
obj::{ObjInsArg, ObjInsArgValue, ObjReloc, ObjSymbol},
};
#[derive(Debug, Copy, Clone)]
pub enum DiffText<'a> {
/// Basic text
Basic(&'a str),
/// Colored text
BasicColor(&'a str, usize),
/// Line number
Line(u32),
/// Instruction address
Address(u64),
/// Instruction mnemonic
Opcode(&'a str, u16),
/// Instruction argument
Argument(&'a ObjInsArgValue, Option<&'a ObjInsArgDiff>),
/// Branch destination
BranchDest(u64, Option<&'a ObjInsArgDiff>),
/// Symbol name
Symbol(&'a ObjSymbol, Option<&'a ObjInsArgDiff>),
/// Number of spaces
Spacing(usize),
/// End of line
Eol,
}
#[derive(Debug, Default, Clone, PartialEq, Eq)]
pub enum HighlightKind {
#[default]
None,
Opcode(u16),
Arg(ObjInsArgValue),
Symbol(String),
Address(u64),
}
pub fn display_diff<E>(
ins_diff: &ObjInsDiff,
base_addr: u64,
mut cb: impl FnMut(DiffText) -> Result<(), E>,
) -> Result<(), E> {
let Some(ins) = &ins_diff.ins else {
cb(DiffText::Eol)?;
return Ok(());
};
if let Some(line) = ins.line {
cb(DiffText::Line(line))?;
}
cb(DiffText::Address(ins.address - base_addr))?;
if let Some(branch) = &ins_diff.branch_from {
cb(DiffText::BasicColor(" ~> ", branch.branch_idx))?;
} else {
cb(DiffText::Spacing(4))?;
}
cb(DiffText::Opcode(&ins.mnemonic, ins.op))?;
let mut arg_diff_idx = 0; // non-PlainText index
for (i, arg) in ins.args.iter().enumerate() {
if i == 0 {
cb(DiffText::Spacing(1))?;
}
let diff = ins_diff.arg_diff.get(arg_diff_idx).and_then(|o| o.as_ref());
match arg {
ObjInsArg::PlainText(s) => {
cb(DiffText::Basic(s))?;
}
ObjInsArg::Arg(v) => {
cb(DiffText::Argument(v, diff))?;
arg_diff_idx += 1;
}
ObjInsArg::Reloc => {
display_reloc_name(ins.reloc.as_ref().unwrap(), &mut cb, diff)?;
arg_diff_idx += 1;
}
ObjInsArg::BranchDest(dest) => {
if let Some(dest) = dest.checked_sub(base_addr) {
cb(DiffText::BranchDest(dest, diff))?;
} else {
cb(DiffText::Basic("<unknown>"))?;
}
arg_diff_idx += 1;
}
}
}
if let Some(branch) = &ins_diff.branch_to {
cb(DiffText::BasicColor(" ~>", branch.branch_idx))?;
}
cb(DiffText::Eol)?;
Ok(())
}
fn display_reloc_name<E>(
reloc: &ObjReloc,
mut cb: impl FnMut(DiffText) -> Result<(), E>,
diff: Option<&ObjInsArgDiff>,
) -> Result<(), E> {
cb(DiffText::Symbol(&reloc.target, diff))?;
match reloc.addend.cmp(&0i64) {
Ordering::Greater => cb(DiffText::Basic(&format!("+{:#x}", reloc.addend))),
Ordering::Less => cb(DiffText::Basic(&format!("-{:#x}", -reloc.addend))),
_ => Ok(()),
}
}
impl PartialEq<DiffText<'_>> for HighlightKind {
fn eq(&self, other: &DiffText) -> bool {
match (self, other) {
(HighlightKind::Opcode(a), DiffText::Opcode(_, b)) => a == b,
(HighlightKind::Arg(a), DiffText::Argument(b, _)) => a.loose_eq(b),
(HighlightKind::Symbol(a), DiffText::Symbol(b, _)) => a == &b.name,
(HighlightKind::Address(a), DiffText::Address(b) | DiffText::BranchDest(b, _)) => {
a == b
}
_ => false,
}
}
}
impl PartialEq<HighlightKind> for DiffText<'_> {
fn eq(&self, other: &HighlightKind) -> bool { other.eq(self) }
}
impl From<DiffText<'_>> for HighlightKind {
fn from(value: DiffText<'_>) -> Self {
match value {
DiffText::Opcode(_, op) => HighlightKind::Opcode(op),
DiffText::Argument(arg, _) => HighlightKind::Arg(arg.clone()),
DiffText::Symbol(sym, _) => HighlightKind::Symbol(sym.name.to_string()),
DiffText::Address(addr) | DiffText::BranchDest(addr, _) => HighlightKind::Address(addr),
_ => HighlightKind::None,
}
}
}