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
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
|
## Check how the "Offset" field is dumped by obj2yaml.
## For each section we calulate the expected offset.
## When it does not match the actual offset, we emit the "Offset" key.
# RUN: yaml2obj %s -o %t1.o
# RUN: obj2yaml %t1.o | FileCheck %s --check-prefix=BASIC
# BASIC: --- !ELF
# BASIC-NEXT: FileHeader:
# BASIC-NEXT: Class: ELFCLASS64
# BASIC-NEXT: Data: ELFDATA2LSB
# BASIC-NEXT: Type: ET_REL
# BASIC-NEXT: Sections:
# BASIC-NEXT: - Name: .foo1
# BASIC-NEXT: Type: SHT_PROGBITS
# BASIC-NEXT: Content: '00'
# BASIC-NEXT: - Name: .foo2
# BASIC-NEXT: Type: SHT_PROGBITS
# BASIC-NEXT: Content: '00'
# BASIC-NEXT: - Name: .foo3
# BASIC-NEXT: Type: SHT_PROGBITS
# BASIC-NEXT: Content: '00'
# BASIC-NEXT: - Name: .bar1
# BASIC-NEXT: Type: SHT_PROGBITS
# BASIC-NEXT: Offset: 0x100
# BASIC-NEXT: Content: '00'
# BASIC-NEXT: - Name: .bar2
# BASIC-NEXT: Type: SHT_PROGBITS
# BASIC-NEXT: AddressAlign: 0x10
# BASIC-NEXT: Content: '00'
# BASIC-NEXT: - Name: .bar3
# BASIC-NEXT: Type: SHT_PROGBITS
# BASIC-NEXT: AddressAlign: 0x10
# BASIC-NEXT: Offset: 0x200
# BASIC-NEXT: - Name: .bar4
# BASIC-NEXT: Type: SHT_PROGBITS
# BASIC-NEXT: AddressAlign: 0x100000000
# BASIC-NEXT: Offset: 0x210
# HEADERS-NEXT: - Type: SectionHeaderTable
# HEADERS-NEXT: Sections:
# HEADERS-NEXT: - Name: .bar4
# HEADERS-NEXT: - Name: .bar3
# HEADERS-NEXT: - Name: .bar2
# HEADERS-NEXT: - Name: .bar1
# HEADERS-NEXT: - Name: .foo3
# HEADERS-NEXT: - Name: .foo2
# HEADERS-NEXT: - Name: .foo1
# HEADERS-NEXT: - Name: .strtab
# HEADERS-NEXT: - Name: .shstrtab
# BASIC-NEXT: ...
--- !ELF
FileHeader:
Class: ELFCLASS64
Data: ELFDATA2LSB
Type: ET_REL
Sections:
## The offset of .foo1 by default is 0x40, because it is placed right
## after the ELF header. In this case we don't dump the "Offset" key,
## because the file offset is naturally expected.
- Name: .foo1
Type: SHT_PROGBITS
Size: 1
Offset: [[FIRSTOFF=<none>]]
AddressAlign: [[FIRSTADDRALIGN=0]]
## Offset of .foo2 == offset of .foo1 + size of .foo1.
## We don't dump the "Offset" key in this case.
## sh_offset of .foo2 is 0x41.
- Name: .foo2
Type: SHT_PROGBITS
Size: 1
## Offset of .foo3 == offset of .foo2 + size of .foo2,
## We don't dump the "Offset" key in this case.
## sh_offset of .foo3 is 0x42.
- Name: .foo3
Type: SHT_PROGBITS
Size: 1
## Offset of .bar1 != offset of .foo3 + size of .foo3.
## We dump the "Offset" key in this case.
## sh_offset of .bar1 is 0x100.
- Name: .bar1
Type: SHT_PROGBITS
Offset: 0x100
Size: 1
## [Offset of .bar1 + size of .bar1] aligned by 0x10 is equal to the offset
## of .bar2. We don't dump the "Offset" key in this case.
## sh_offset of .bar2 is 0x110.
- Name: .bar2
Type: SHT_PROGBITS
AddressAlign: 0x10
Offset: 0x110
Size: 1
## [Offset of .bar2 + size of .bar2] aligned by 0x10 is not equal to the offset
## of .bar3. We dump the "Offset" key in this case.
## sh_offset of .bar3 is 0x200.
- Name: .bar3
Type: SHT_PROGBITS
AddressAlign: 0x10
Offset: 0x200
## A case where AddressAlign > MAX_UINT32 and (uint32_t)AddressAlign == 0.
## Check we dump an offset in this case properly.
- Name: .bar4
Type: SHT_PROGBITS
AddressAlign: 0x100000000
Offset: 0x210
- Type: SectionHeaderTable
Sections:
## By default we have the same order of sections as defined by the "Sections" key.
- Name: [[SEC1=.foo1]]
- Name: [[SEC2=.foo2]]
- Name: [[SEC3=.foo3]]
- Name: [[SEC4=.bar1]]
- Name: [[SEC5=.bar2]]
- Name: [[SEC6=.bar3]]
- Name: [[SEC7=.bar4]]
- Name: .strtab
- Name: .shstrtab
## In this case we change the order of sections in the section header table.
## Check that we still dump offsets correctly.
# RUN: yaml2obj %s -DSEC1=.bar4 -DSEC2=.bar3 -DSEC3=.bar2 \
# RUN: -DSEC4=.bar1 -DSEC5=.foo3 -DSEC6=.foo2 -DSEC7=.foo1 -o %t1-sechdr.o
# RUN: obj2yaml %t1-sechdr.o | FileCheck --check-prefixes=BASIC,HEADERS %s
## Show we dump the "Offset" key for the first section when
## it has an unexpected file offset.
# RUN: yaml2obj %s -DFIRSTOFF=0x40 -o %t2a.o
# RUN: obj2yaml %t2a.o | FileCheck %s --check-prefix=BASIC
# RUN: yaml2obj %s -DFIRSTOFF=0x41 -o %t2b.o
# RUN: obj2yaml %t2b.o | FileCheck %s --check-prefix=FIRSTSEC
# FIRSTSEC: Sections:
# FIRSTSEC-NEXT: - Name: .foo1
# FIRSTSEC-NEXT: Type: SHT_PROGBITS
# FIRSTSEC-NEXT: Offset: 0x41
# FIRSTSEC-NEXT: Content: '00'
## Test that we take the alignment of the first section into account
## when calculating the expected offset for it. In this case we don't
## dump the "Offset", because it is expected.
# RUN: yaml2obj %s -DFIRSTOFF=0x80 -DFIRSTADDRALIGN=0x80 -o %t3.o
# RUN: obj2yaml %t3.o | FileCheck %s --check-prefix=FIRSTSECALIGN
# FIRSTSECALIGN: - Name: .foo1
# FIRSTSECALIGN-NEXT: Type: SHT_PROGBITS
# FIRSTSECALIGN-NEXT: AddressAlign: 0x80
# FIRSTSECALIGN-NEXT: Content: '00'
# FIRSTSECALIGN-NEXT: - Name:
## Test that we take the program headers offset and size into account when calculating
## the expected file offset of the first section.
# RUN: yaml2obj %s --docnum=2 -o %t4a.o
# RUN: obj2yaml %t4a.o | FileCheck %s --check-prefix=FIRSTSECPHDRS
## The expected file offset of the first section is:
## 0x40 (start of program headers) + 0x38 (size of program headers) * 2(number of program headers) = 0xB0
# RUN: yaml2obj %s --docnum=2 -DFIRSTOFF=0xB0 -o %t4b.o
# RUN: obj2yaml %t4b.o | FileCheck %s --check-prefix=FIRSTSECPHDRS
# RUN: yaml2obj %s --docnum=2 -DFIRSTOFF=0xB1 -o %t4c.o
# RUN: obj2yaml %t4c.o | FileCheck %s --check-prefixes=FIRSTSECPHDRS,FIRSTSECPHDRSOFFSET
# FIRSTSECPHDRS: Sections:
# FIRSTSECPHDRS-NEXT: - Name: .foo
# FIRSTSECPHDRS-NEXT: Type: SHT_PROGBITS
# FIRSTSECPHDRSOFFSET-NEXT: Offset: 0xB1
# FIRSTSECPHDRS-NEXT: ...
--- !ELF
FileHeader:
Class: ELFCLASS64
Data: ELFDATA2LSB
Type: ET_REL
Sections:
- Name: .foo
Type: SHT_PROGBITS
Offset: [[FIRSTOFF=<none>]]
ProgramHeaders:
- Type: PT_LOAD
- Type: PT_LOAD
## Test that when there are no program headers in the file, we don't take SHT_NOBITS
## section sizes into account, but respect their alignment when calculating the expected
## section offsets.
# RUN: yaml2obj %s --docnum=3 -o %t5.o
# RUN: obj2yaml %t5.o | FileCheck %s --check-prefix=NOBITS
# NOBITS: Sections:
# NOBITS-NEXT: - Name: .progbits1
# NOBITS-NEXT: Type: SHT_PROGBITS
# NOBITS-NEXT: Content: '00'
# NOBITS-NEXT: - Name: .nobits1
# NOBITS-NEXT: Type: SHT_NOBITS
# NOBITS-NEXT: Size: 0x10
# NOBITS-NEXT: - Name: .progbits2
# NOBITS-NEXT: Type: SHT_PROGBITS
# NOBITS-NEXT: Content: '0000'
# NOBITS-NEXT: - Name: .nobits2
# NOBITS-NEXT: Type: SHT_NOBITS
# NOBITS-NEXT: AddressAlign: 0x100
# NOBITS-NEXT: Size: 0x100
# NOBITS-NEXT: - Name: .progbits3
# NOBITS-NEXT: Type: SHT_PROGBITS
# NOBITS-NEXT: Content: '000000'
# NOBITS-NEXT: ...
--- !ELF
FileHeader:
Class: ELFCLASS64
Data: ELFDATA2LSB
Type: ET_REL
Sections:
## sh_offset == 0x40.
- Name: .progbits1
Type: SHT_PROGBITS
Size: 0x1
## sh_offset == 0x41.
- Name: .nobits1
Type: SHT_NOBITS
Size: 0x10
## sh_offset == 0x41.
- Name: .progbits2
Type: SHT_PROGBITS
Size: 0x2
## sh_offset == 0x100.
- Name: .nobits2
Type: SHT_NOBITS
Size: 0x100
AddressAlign: 0x100
## sh_offset == 0x100.
- Name: .progbits3
Type: SHT_PROGBITS
Size: 0x3
## Check that we might take sizes of SHT_NOBITS sections into account when calculating
## the expected offsets when there are program headers in the file. The rule is the following:
## we assume that the file space is allocated for the SHT_NOBITS section when there are
## other non-nobits sections in the same segment that follows it.
# RUN: yaml2obj %s --docnum=4 -o %t6.o
# RUN: obj2yaml %t6.o | FileCheck %s --check-prefix=NOBITS-PHDRS
# NOBITS-PHDRS: Sections:
# NOBITS-PHDRS-NEXT: - Name: .nobits1
# NOBITS-PHDRS-NEXT: Type: SHT_NOBITS
# NOBITS-PHDRS-NEXT: Size: 0x1
# NOBITS-PHDRS-NEXT: - Name: .progbits
# NOBITS-PHDRS-NEXT: Type: SHT_PROGBITS
# NOBITS-PHDRS-NEXT: Content: '0000'
# NOBITS-PHDRS-NEXT: - Name: .nobits3
# NOBITS-PHDRS-NEXT: Type: SHT_NOBITS
# NOBITS-PHDRS-NEXT: Size: 0x100
# NOBITS-PHDRS-NEXT: - Name: .nobits4
# NOBITS-PHDRS-NEXT: Type: SHT_NOBITS
# NOBITS-PHDRS-NEXT: Size: 0x200
# NOBITS-PHDRS-NEXT: - Name: .nobits5
# NOBITS-PHDRS-NEXT: Type: SHT_NOBITS
# NOBITS-PHDRS-NEXT: Offset: 0x100
# NOBITS-PHDRS-NEXT: Size: 0x300
# NOBITS-PHDRS-NEXT: ...
--- !ELF
FileHeader:
Class: ELFCLASS64
Data: ELFDATA2LSB
Type: ET_REL
Sections:
## sh_offset == 0xe8.
- Name: .nobits1
Type: SHT_NOBITS
Size: 0x1
## sh_offset == 0xe9.
- Name: .progbits
Type: SHT_PROGBITS
Size: 0x2
## sh_offset == 0xeb.
- Name: .nobits3
Type: SHT_NOBITS
Size: 0x100
## sh_offset == 0xeb.
- Name: .nobits4
Type: SHT_NOBITS
Size: 0x200
## sh_offset == 0x100.
- Name: .nobits5
Type: SHT_NOBITS
Size: 0x300
Offset: 0x100
ProgramHeaders:
- Type: PT_LOAD
FirstSec: .nobits1
LastSec: .progbits
- Type: PT_LOAD
FirstSec: .nobits3
LastSec: .nobits4
- Type: PT_LOAD
FirstSec: .nobits5
LastSec: .nobits5
|
