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
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
use std;
use std::io::Write;
use byteorder::WriteBytesExt;
use super::*;
use leb128;
#[derive(Debug)]
pub enum WriteError {
Io(std::io::Error),
Invalid(String),
Unsupported(String),
}
impl std::convert::From<std::io::Error> for WriteError {
fn from(e: std::io::Error) -> Self {
WriteError::Io(e)
}
}
impl<'a> CompilationUnit<'a> {
pub fn write<W: Write>(&self, w: &mut W) -> Result<(), WriteError> {
let len = self.base_len();
match self.offset_size {
4 => {
if len >= 0xfffffff0 {
return Err(WriteError::Invalid(format!("compilation unit length {}", len)));
}
try!(self.endian.write_u32(w, len as u32));
}
8 => {
try!(self.endian.write_u32(w, 0xffffffff));
try!(self.endian.write_u64(w, len as u64));
}
_ => return Err(WriteError::Unsupported(format!("offset size {}", self.offset_size))),
};
try!(self.endian.write_u16(w, self.version));
try!(write_offset(w, self.endian, self.offset_size, self.abbrev_offset));
try!(w.write_u8(self.address_size));
try!(w.write_all(&*self.data));
Ok(())
}
}
impl<'a, 'b> Die<'a> {
pub fn write_null(unit: &mut CompilationUnit<'b>) -> std::io::Result<()> {
let w = unit.data.to_mut();
leb128::write_u64(w, 0)
}
pub fn write(
&self,
unit: &mut CompilationUnit<'b>,
abbrev_hash: &AbbrevHash,
) -> Result<(), WriteError> {
if self.code == 0 {
try!(Die::write_null(unit));
return Ok(());
}
let abbrev = match abbrev_hash.get(self.code) {
Some(abbrev) => abbrev,
None => return Err(WriteError::Invalid(format!("missing abbrev {}", self.code))),
};
if self.children != abbrev.children {
return Err(WriteError::Invalid("die/abbrev children mismatch".to_string()));
}
if self.attributes.len() != abbrev.attributes.len() {
return Err(WriteError::Invalid("die/abbrev attribute length mismatch".to_string()));
}
try!(leb128::write_u64(unit.data.to_mut(), abbrev.code));
for (attribute, abbrev_attribute) in self.attributes.iter().zip(&abbrev.attributes) {
try!(attribute.write(unit, abbrev_attribute));
}
Ok(())
}
}
impl<'a, 'b> Attribute<'a> {
pub fn write(
&self,
unit: &mut CompilationUnit<'b>,
abbrev: &AbbrevAttribute,
) -> Result<(), WriteError> {
if self.at != abbrev.at {
return Err(WriteError::Invalid("attribute type mismatch".to_string()));
}
try!(self.data.write(unit, abbrev.form, false));
Ok(())
}
}
#[cfg_attr(feature = "clippy", allow(match_same_arms))]
impl<'a, 'b> AttributeData<'a> {
pub fn write(
&self,
unit: &mut CompilationUnit<'b>,
form: constant::DwForm,
indirect: bool,
) -> Result<(), WriteError> {
let w = unit.data.to_mut();
if indirect {
try!(leb128::write_u16(w, form.0));
}
match (self, form) {
(&AttributeData::Address(ref val), constant::DW_FORM_addr) => {
try!(write_address(w, unit.endian, unit.address_size, *val));
},
(&AttributeData::Block(ref val), constant::DW_FORM_block1) => {
try!(w.write_u8(val.len() as u8));
try!(w.write_all(val));
},
(&AttributeData::Block(ref val), constant::DW_FORM_block2) => {
try!(unit.endian.write_u16(w, val.len() as u16));
try!(w.write_all(val));
},
(&AttributeData::Block(ref val), constant::DW_FORM_block4) => {
try!(unit.endian.write_u32(w, val.len() as u32));
try!(w.write_all(val));
},
(&AttributeData::Block(ref val), constant::DW_FORM_block) => {
try!(leb128::write_u64(w, val.len() as u64));
try!(w.write_all(val));
},
(&AttributeData::Data1(ref val), constant::DW_FORM_data1) => {
try!(w.write_u8(*val));
},
(&AttributeData::Data2(ref val), constant::DW_FORM_data2) => {
try!(unit.endian.write_u16(w, *val));
},
(&AttributeData::Data4(ref val), constant::DW_FORM_data4) => {
try!(unit.endian.write_u32(w, *val));
},
(&AttributeData::Data8(ref val), constant::DW_FORM_data8) => {
try!(unit.endian.write_u64(w, *val));
},
(&AttributeData::UData(ref val), constant::DW_FORM_udata) => {
try!(leb128::write_u64(w, *val));
},
(&AttributeData::SData(ref val), constant::DW_FORM_sdata) => {
try!(leb128::write_i64(w, *val));
},
(&AttributeData::Flag(ref val), constant::DW_FORM_flag) => {
try!(w.write_u8(if *val { 1 } else { 0 }));
},
(&AttributeData::Flag(ref val), constant::DW_FORM_flag_present) => {
assert!(*val);
},
(&AttributeData::String(ref val), constant::DW_FORM_string) => {
try!(w.write_all(val.as_bytes()));
try!(w.write_u8(0));
},
(&AttributeData::StringOffset(ref val), constant::DW_FORM_strp) => {
try!(write_offset(w, unit.endian, unit.offset_size, *val));
},
(&AttributeData::Ref(ref val), constant::DW_FORM_ref1) => {
try!(w.write_u8(*val as u8));
},
(&AttributeData::Ref(ref val), constant::DW_FORM_ref2) => {
try!(unit.endian.write_u16(w, *val as u16));
},
(&AttributeData::Ref(ref val), constant::DW_FORM_ref4) => {
try!(unit.endian.write_u32(w, *val as u32));
},
(&AttributeData::Ref(ref val), constant::DW_FORM_ref8) => {
try!(unit.endian.write_u64(w, *val as u64));
},
(&AttributeData::Ref(ref val), constant::DW_FORM_ref_udata) => {
try!(leb128::write_u64(w, *val as u64));
},
(&AttributeData::RefAddress(ref val), constant::DW_FORM_ref_addr) => {
try!(write_offset(w, unit.endian, unit.offset_size, *val));
},
(&AttributeData::RefSig(ref val), constant::DW_FORM_ref_sig8) => {
try!(unit.endian.write_u64(w, *val));
},
(&AttributeData::SecOffset(ref val), constant::DW_FORM_sec_offset) => {
try!(write_offset(w, unit.endian, unit.offset_size, *val));
},
(&AttributeData::ExprLoc(ref val), constant::DW_FORM_exprloc) => {
try!(leb128::write_u64(w, val.len() as u64));
try!(w.write_all(val));
},
_ => return Err(WriteError::Unsupported(format!("attribute form {}", form.0))),
}
Ok(())
}
}
fn write_offset<W: Write>(w: &mut W, endian: Endian, offset_size: u8, val: u64) -> Result<(), WriteError> {
match offset_size {
4 => try!(endian.write_u32(w, val as u32)),
8 => try!(endian.write_u64(w, val)),
_ => return Err(WriteError::Unsupported(format!("offset size {}", offset_size))),
};
Ok(())
}
fn write_address<W: Write>(w: &mut W, endian: Endian, address_size: u8, val: u64) -> Result<(), WriteError> {
match address_size {
4 => try!(endian.write_u32(w, val as u32)),
8 => try!(endian.write_u64(w, val)),
_ => return Err(WriteError::Unsupported(format!("address size {}", address_size))),
};
Ok(())
}
impl AbbrevVec {
pub fn write<W: Write>(&self, w: &mut W) -> std::io::Result<()> {
for abbrev in self.iter() {
try!(abbrev.write(w));
}
try!(Abbrev::write_null(w));
Ok(())
}
}
impl Abbrev {
pub fn write_null<W: Write>(w: &mut W) -> std::io::Result<()> {
leb128::write_u64(w, 0)
}
pub fn write<W: Write>(&self, w: &mut W) -> std::io::Result<()> {
try!(leb128::write_u64(w, self.code));
if self.code == 0 {
return Ok(());
}
try!(leb128::write_u16(w, self.tag.0));
let children = if self.children {
constant::DW_CHILDREN_yes
} else {
constant::DW_CHILDREN_no
};
try!(w.write_u8(children.0));
for attribute in &self.attributes {
try!(attribute.write(w));
}
try!(AbbrevAttribute::write_null(w));
Ok(())
}
}
impl AbbrevAttribute {
pub fn write_null<W: Write>(w: &mut W) -> std::io::Result<()> {
Self::null().write(w)
}
pub fn write<W: Write>(&self, w: &mut W) -> std::io::Result<()> {
try!(leb128::write_u16(w, self.at.0));
try!(leb128::write_u16(w, self.form.0));
Ok(())
}
}