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c21ea7e2f4
Linkers (ld.bfd/gold/lld) place the section header table at the very end. This allows tools to strip it, which is optional in executable/shared objects. In addition, if we add or section, the size of the section header table will change. Placing the section header table in the end keeps section offsets unchanged. yaml2obj currently places the section header table immediately after the program header. Follow what linkers do to make offset updating easier. Reviewed By: grimar Differential Revision: https://reviews.llvm.org/D67221 llvm-svn: 371074
114 lines
3.1 KiB
YAML
114 lines
3.1 KiB
YAML
## Check we are able to produce a valid SHT_GNU_versym
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## section from its description.
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# RUN: yaml2obj --docnum=1 %s -o %t1
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# RUN: llvm-readobj -V %t1 | FileCheck %s
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# CHECK: Version symbols {
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# CHECK-NEXT: Section Name: .gnu.version
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# CHECK-NEXT: Address: 0x200210
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# CHECK-NEXT: Offset: 0x40
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# CHECK-NEXT: Link: 6
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# CHECK-NEXT: Symbols [
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# CHECK-NEXT: Symbol {
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# CHECK-NEXT: Version: 0
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# CHECK-NEXT: Name:
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# CHECK-NEXT: }
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# CHECK-NEXT: Symbol {
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# CHECK-NEXT: Version: 3
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# CHECK-NEXT: Name: f1@v1
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# CHECK-NEXT: }
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# CHECK-NEXT: Symbol {
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# CHECK-NEXT: Version: 4
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# CHECK-NEXT: Name: f2@v2
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# CHECK-NEXT: }
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# CHECK-NEXT: ]
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# CHECK-NEXT: }
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# CHECK-NEXT: SHT_GNU_verdef {
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# CHECK-NEXT: }
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# CHECK-NEXT: SHT_GNU_verneed {
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# CHECK-NEXT: Dependency {
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# CHECK-NEXT: Version: 1
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# CHECK-NEXT: Count: 2
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# CHECK-NEXT: FileName: dso.so.0
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# CHECK-NEXT: Entries [
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# CHECK-NEXT: Entry {
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# CHECK-NEXT: Hash: 1937
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# CHECK-NEXT: Flags: 0x0
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# CHECK-NEXT: Index: 3
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# CHECK-NEXT: Name: v1
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# CHECK-NEXT: }
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# CHECK-NEXT: Entry {
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# CHECK-NEXT: Hash: 1938
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# CHECK-NEXT: Flags: 0x0
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# CHECK-NEXT: Index: 4
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# CHECK-NEXT: Name: v2
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# CHECK-NEXT: }
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# CHECK-NEXT: ]
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# CHECK-NEXT: }
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# CHECK-NEXT: }
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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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Entry: 0x0000000000201000
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Sections:
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- Name: .gnu.version
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Type: SHT_GNU_versym
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Flags: [ SHF_ALLOC ]
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Address: 0x0000000000200210
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Link: .dynsym
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AddressAlign: 0x0000000000000002
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EntSize: 0x0000000000000002
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Entries: [ 0, 3, 4 ]
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- Name: .gnu.version_r
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Type: SHT_GNU_verneed
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Flags: [ SHF_ALLOC ]
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Address: 0x0000000000200250
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Link: .dynstr
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AddressAlign: 0x0000000000000004
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Info: 0x0000000000000001
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Dependencies:
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- Version: 1
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File: dso.so.0
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Entries:
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- Name: v1
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Hash: 1937
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Flags: 0
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Other: 3
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- Name: v2
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Hash: 1938
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Flags: 0
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Other: 4
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DynamicSymbols:
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- Name: f1
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Binding: STB_GLOBAL
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- Name: f2
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Binding: STB_GLOBAL
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...
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## Check we are able to set custom sh_entsize field for SHT_GNU_versym section.
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# RUN: yaml2obj --docnum=2 %s -o %t2
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# RUN: llvm-readelf -S %t2 | FileCheck %s --check-prefix=ENTSIZE
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# ENTSIZE: Section Headers:
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# ENTSIZE: [Nr] Name Type Address Off Size ES
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# ENTSIZE: [ 1] .gnu.version VERSYM 0000000000000000 000040 000000 03
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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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OSABI: ELFOSABI_FREEBSD
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Type: ET_DYN
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Machine: EM_X86_64
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Sections:
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- Name: .gnu.version
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Type: SHT_GNU_versym
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EntSize: 0x0000000000000003
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Entries: [ ]
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