a7a447be0f
Imagine we have a YAML declaration of few sections: `foo1`, `<unnamed 2>`, `foo3`, `foo4`. To put them into segment we can do (1*): ``` Sections: - Section: foo1 - Section: foo4 ``` or we can use (2*): ``` Sections: - Section: foo1 - Section: foo3 - Section: foo4 ``` or (3*) : ``` Sections: - Section: foo1 ## "(index 2)" here is a name that we automatically created for a unnamed section. - Section: (index 2) - Section: foo3 - Section: foo4 ``` It looks really confusing that we don't have to list all of sections. At first I've tried to make this rule stricter and report an error when there is a gap (i.e. when a section is included into segment, but not listed explicitly). This did not work perfect, because such approach conflicts with unnamed sections/fills (see (3*)). This patch drops "Sections" key and introduces 2 keys instead: `FirstSec` and `LastSec`. Both are optional. Differential revision: https://reviews.llvm.org/D90458
92 lines
2.8 KiB
Plaintext
92 lines
2.8 KiB
Plaintext
## .empty is not covered by a segment. Its offset is moved to 0x200 to fill the gap.
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# RUN: yaml2obj --docnum=1 %s -o %t1
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# RUN: llvm-objcopy %t1 %t1.out
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# RUN: llvm-readelf -S %t1.out | FileCheck --check-prefix=CHECK1 %s
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# CHECK1: Name Type Address Off
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# CHECK1-NEXT: NULL 0000000000000000 000000
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# CHECK1-NEXT: .foo PROGBITS 0000000000000000 000100
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# CHECK1-NEXT: .empty PROGBITS 0000000000001000 000200
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# CHECK1-NEXT: .baz PROGBITS 0000000000001000 001000
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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_EXEC
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Machine: EM_X86_64
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Sections:
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- Name: gap
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Type: Fill
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Size: 0xE00
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- Name: .foo
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Type: SHT_PROGBITS
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Flags: [ SHF_ALLOC ]
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AddressAlign: 0x100
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Address: 0
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Size: 0x100
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- Name: .empty
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Type: SHT_PROGBITS
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Flags: [ SHF_ALLOC ]
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Address: 0x1000
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- Name: .baz
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Type: SHT_PROGBITS
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Flags: [ SHF_ALLOC ]
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AddressAlign: 0x1000
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Address: 0x1000
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Size: 0x100
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## Test that we attribute .empty to the second segment. Its offset is assigned according to
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## the p_offset of the second segment.
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# RUN: yaml2obj --docnum=2 %s -o %t2
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# RUN: llvm-objcopy %t2 %t2.out
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# RUN: llvm-readelf -S -l %t2.out | FileCheck --check-prefix=CHECK2 %s
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# CHECK2: Name Type Address Off
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# CHECK2-NEXT: NULL 0000000000000000 000000
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# CHECK2-NEXT: .foo PROGBITS 0000000000000000 000100
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# CHECK2-NEXT: .empty PROGBITS 0000000000001000 001000
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# CHECK2-NEXT: .baz PROGBITS 0000000000001000 001000
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# CHECK2: Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align
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# CHECK2-NEXT: LOAD 0x000100 0x0000000000000000 0x0000000000000000 0x000100 0x000100 0x100
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# CHECK2-NEXT: LOAD 0x001000 0x0000000000001000 0x0000000000001000 0x000100 0x000100 0x1000
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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_EXEC
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Machine: EM_X86_64
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Sections:
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- Name: gap
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Type: Fill
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Size: 0xE00
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- Name: .foo
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Type: SHT_PROGBITS
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Flags: [ SHF_ALLOC ]
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AddressAlign: 0x100
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Address: 0
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Size: 0x100
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- Name: .empty
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Type: SHT_PROGBITS
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Flags: [ SHF_ALLOC ]
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Address: 0x1000
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- Name: .baz
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Type: SHT_PROGBITS
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Flags: [ SHF_ALLOC ]
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AddressAlign: 0x1000
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Address: 0x1000
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Size: 0x100
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ProgramHeaders:
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- Type: PT_LOAD
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VAddr: 0
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Align: 0x100
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FirstSec: .foo
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LastSec: .foo
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- Type: PT_LOAD
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VAddr: 0x1000
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Align: 0x1000
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FirstSec: .empty
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LastSec: .baz
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