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