## Check we are able to set an offset field for sections using the 'Offset' key.
## Show how the 'Offset' field key can be used.
## Show that it can affect the layout of the rest of the file.
# RUN: yaml2obj --docnum=1 %s -o %t1
# RUN: llvm-readelf --sections %t1 | FileCheck %s --check-prefix=DEFAULT
# DEFAULT: [Nr] Name Type Address Off
# DEFAULT: [ 1] .foo PROGBITS 0000000000000000 000040
# DEFAULT-NEXT: [ 2] .bar PROGBITS 0000000000000000 000048
# DEFAULT-NEXT: [ 3] .strtab STRTAB 0000000000000000 000058
# DEFAULT-NEXT: [ 4] .shstrtab STRTAB 0000000000000000 000059
--- !ELF
FileHeader:
Class: ELFCLASS64
Data: ELFDATA2LSB
Type: ET_REL
Sections:
- Name: .foo
Type: SHT_PROGBITS
Size: 0x8
- Name: .bar
Type: SHT_PROGBITS
Size: 0x10
## It is a no-op. We set it to reduce amount
## of differences with the second YAML below.
AddressAlign: 0x0
## The same as previous, but an arbitrary 'Offset' is set for the .bar section.
# RUN: yaml2obj --docnum=2 %s -o %t2 -DOFFSET=0x50 -DALIGN=0x0
# RUN: llvm-readelf --sections %t2 | FileCheck %s --check-prefix=OFFSET
# OFFSET: [Nr] Name Type Address Off
# OFFSET: [ 1] .foo PROGBITS 0000000000000000 000040
# OFFSET-NEXT: [ 2] .bar PROGBITS 0000000000000000 000050
# OFFSET-NEXT: [ 3] .strtab STRTAB 0000000000000000 000060
# OFFSET-NEXT: [ 4] .shstrtab STRTAB 0000000000000000 000061
--- !ELF
FileHeader:
Class: ELFCLASS64
Data: ELFDATA2LSB
Type: ET_REL
Sections:
- Name: .foo
Type: SHT_PROGBITS
Size: 0x8
- Name: .bar
Type: SHT_PROGBITS
Size: 0x10
Offset: [[OFFSET]]
AddressAlign: [[ALIGN]]
## Set the 'Offset' to the same value as was set by default to show
## that there is no difference in the output in this case.
# RUN: yaml2obj --docnum=2 %s -o %t3 -DOFFSET=0x48 -DALIGN=0x0
# RUN: cmp %t1 %t3
## Show that we can set an offset and an address alignment independently for a section.
# RUN: yaml2obj --docnum=2 %s -o %t4 -DOFFSET=0x48 -DALIGN=0x5
# RUN: llvm-readelf --sections %t4 | FileCheck %s --check-prefix=OFFSET-AND-ALIGN
# OFFSET-AND-ALIGN: [Nr] Name Type Address Off Size ES Flg Lk Inf Al
# OFFSET-AND-ALIGN: [ 2] .bar PROGBITS 0000000000000000 000048 000010 00 0 0 5
## Show we do not allow an 'Offset' to go backward.
# RUN: not yaml2obj --docnum=2 %s -DOFFSET=0x47 -DALIGN=0x0 2>&1 | \
# RUN: FileCheck %s --check-prefix=ERR-BACKWARD
# ERR-BACKWARD: error: the 'Offset' value (0x47) goes backward
## Show that the 'Offset' key can be used together with the 'ShOffset' key.
## Case 1: set the same value for 'Offset' and 'ShOffset' keys.
# RUN: yaml2obj --docnum=3 %s -o %t5 -DSHOFFSET=0x100 -DOFFSET=0x100
# RUN: llvm-readelf --headers --sections %t5 | FileCheck %s --check-prefix=BOTH-SAME
## The same offset as in the Case 3.
# BOTH-SAME: Start of section headers: 288 (bytes into file)
# BOTH-SAME: [Nr] Name Type Address Off
# BOTH-SAME: [ 1] .foo PROGBITS 0000000000000000 000100
# BOTH-SAME-NEXT: [ 2] .bar PROGBITS 0000000000000000 000101
# BOTH-SAME-NEXT: [ 3] .strtab STRTAB 0000000000000000 000102
## Case 2: set the 'Offset' value to be less than the 'ShOffset'.
# RUN: yaml2obj --docnum=3 %s -o %t6 -DSHOFFSET=0x100 -DOFFSET=0x90
# RUN: llvm-readelf --headers --sections %t6 | FileCheck %s --check-prefix=BOTH-A
## 176 < 288 (start of section headers in Case 1).
# BOTH-A: Start of section headers: 176 (bytes into file)
## Show that the 'Offset' field sets the physical offset in a file and the `ShOffset`
## field only overrides the sh_offset value of the .foo section.
# BOTH-A: [Nr] Name Type Address Off
# BOTH-A: [ 1] .foo PROGBITS 0000000000000000 000100
# BOTH-A-NEXT: [ 2] .bar PROGBITS 0000000000000000 000091
# BOTH-A-NEXT: [ 3] .strtab STRTAB 0000000000000000 000092
## Case 3: set the 'Offset' value to be greater than the 'ShOffset' value.
# RUN: yaml2obj --docnum=3 %s -o %t7 -DSHOFFSET=0x90 -DOFFSET=0x100
# RUN: llvm-readelf --sections --headers %t7 | FileCheck %s --check-prefix=BOTH-B
## The same offset as in Case 1.
# BOTH-B: Start of section headers: 288 (bytes into file)
## Show that the 'Offset' field sets the physical offset in file and `ShOffset`
## field only affects the sh_offset value of the .foo section (overrides it).
# BOTH-B: [Nr] Name Type Address Off
# BOTH-B: [ 1] .foo PROGBITS 0000000000000000 000090
# BOTH-B-NEXT: [ 2] .bar PROGBITS 0000000000000000 000101
# BOTH-B-NEXT: [ 3] .strtab STRTAB 0000000000000000 000102
--- !ELF
FileHeader:
Class: ELFCLASS64
Data: ELFDATA2LSB
Type: ET_REL
Sections:
- Name: .foo
Type: SHT_PROGBITS
Size: 0x1
ShOffset: [[SHOFFSET]]
Offset: [[OFFSET]]
- Name: .bar
Type: SHT_PROGBITS
Size: 0x1
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