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ELFYAML.h contains a `Section` class which is a base for a few other sections classes that are used for mapping different section types. `Section` has a `StringRef Info` field used for storing sh_info. At the same time, sh_info has very different meanings for sections and cannot be processed in a similar way generally, for example ELFDumper does not handle it in `dumpCommonSection` but do that in `dumpGroup` and `dumpCommonRelocationSection` respectively. At this moment, we have and handle it as a string, because that was possible for the current use case. But also it can simply be a number: For SHT_GNU_verdef is "The number of version definitions within the section." The patch moves `Info` field out to be able to have it as a number. With that change, each class will be able to decide what type and purpose of the sh_info field it wants to use. I also had to edit 2 test cases. This is because patch fixes a bug. Previously we accepted yaml files with Info fields for all sections (for example, for SHT_DYNSYM too). But we do not handle it and the resulting objects had zero sh_info fields set for such sections. Now it is accepted only for sections that supports it. Differential revision: https://reviews.llvm.org/D58054 llvm-svn: 353810
237 lines
8.4 KiB
Plaintext
237 lines
8.4 KiB
Plaintext
## Show that llvm-readelf + llvm-readobj demangle symbol names in symbol tables
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## (including dynamic symbols), relocations (including dynamic relocations), and groups.
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# RUN: yaml2obj %s > %t.so
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## Check LLVM output style.
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# RUN: llvm-readobj --symbols --relocations --dyn-symbols --dyn-relocations \
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# RUN: --elf-section-groups --elf-cg-profile --addrsig \
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# RUN: --demangle %t.so > %t.llvm.long
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# RUN: llvm-readobj --symbols --relocations --dyn-symbols --dyn-relocations \
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# RUN: --elf-section-groups --elf-cg-profile --addrsig \
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# RUN: -C %t.so > %t.llvm.short
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# RUN: FileCheck %s --input-file %t.llvm.long --check-prefixes=LLVM-COMMON,LLVM-DEMANGLE
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# RUN: diff %t.llvm.long %t.llvm.short
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## Check that default is no demangling.
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# RUN: llvm-readobj --symbols --relocations --dyn-symbols --dyn-relocations \
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# RUN: --elf-section-groups --elf-cg-profile --addrsig \
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# RUN: %t.so > %t.llvm.default
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# RUN: llvm-readobj --symbols --relocations --dyn-symbols --dyn-relocations \
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# RUN: --elf-section-groups --elf-cg-profile --addrsig \
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# RUN: --demangle=false %t.so > %t.llvm.nodemangle
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# RUN: FileCheck %s --input-file %t.llvm.default --check-prefixes=LLVM-COMMON,LLVM-MANGLED
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# RUN: diff %t.llvm.default %t.llvm.nodemangle
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# LLVM-COMMON: Relocations [
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# LLVM-COMMON: Section {{.*}} .rela.text.foo {
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# LLVM-DEMANGLE-NEXT: {{ }}foo(char){{ }}
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# LLVM-MANGLED-NEXT: {{ }}_Z3fooc{{ }}
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# LLVM-COMMON-NEXT: }
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# LLVM-COMMON: ]
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# LLVM-COMMON: Dynamic Relocations {
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# LLVM-DEMANGLE-NEXT: {{ }}foo(int){{ }}
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# LLVM-MANGLED-NEXT: {{ }}_Z3fooi{{ }}
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# LLVM-COMMON-NEXT: }
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# LLVM-COMMON: Symbols [
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# LLVM-DEMANGLE: Name: foo(char){{ }}
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# LLVM-DEMANGLE: Name: blah(float){{ }}
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# LLVM-MANGLED: Name: _Z3fooc{{ }}
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# LLVM-MANGLED: Name: _Z4blahf{{ }}
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# LLVM-COMMON: ]
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# LLVM-COMMON: DynamicSymbols [
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# LLVM-DEMANGLE: Name: foo(int){{ }}
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# LLVM-MANGLED: Name: _Z3fooi{{ }}
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# LLVM-COMMON: ]
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# LLVM-COMMON: Groups {
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# LLVM-DEMANGLE: Signature: foo(char){{$}}
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# LLVM-MANGLED: Signature: _Z3fooc{{$}}
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# LLVM-COMMON: }
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# LLVM-COMMON: CGProfile [
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# LLVM-DEMANGLE: From: foo(char){{ }}
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# LLVM-DEMANGLE: To: blah(float){{ }}
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# LLVM-MANGLED: From: _Z3fooc{{ }}
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# LLVM-MANGLED: To: _Z4blahf{{ }}
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# LLVM-COMMON: ]
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# LLVM-COMMON: Addrsig [
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# LLVM-DEMANGLE-NEXT: Sym: foo(char){{ }}
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# LLVM-DEMANGLE-NEXT: Sym: blah(float){{ }}
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# LLVM-MANGLED-NEXT: Sym: _Z3fooc{{ }}
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# LLVM-MANGLED-NEXT: Sym: _Z4blahf{{ }}
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# LLVM-COMMON-NEXT: ]
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## Check GNU output style.
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# RUN: llvm-readelf --symbols --relocations --dyn-symbols --dyn-relocations \
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# RUN: --elf-section-groups --demangle %t.so > %t.gnu.long
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# RUN: llvm-readelf --symbols --relocations --dyn-symbols --dyn-relocations \
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# RUN: --elf-section-groups -C %t.so > %t.gnu.short
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# RUN: FileCheck %s --input-file %t.gnu.long --check-prefixes=GNU-COMMON,GNU-DEMANGLE
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# RUN: diff %t.gnu.long %t.gnu.short
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## Check that default is no demangling.
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# RUN: llvm-readelf --symbols --relocations --dyn-symbols --dyn-relocations \
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# RUN: --elf-section-groups %t.so > %t.gnu.default
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# RUN: llvm-readelf --symbols --relocations --dyn-symbols --dyn-relocations \
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# RUN: --elf-section-groups --demangle=false %t.so > %t.gnu.nodemangle
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# RUN: FileCheck %s --input-file %t.gnu.default --check-prefixes=GNU-COMMON,GNU-MANGLED
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# RUN: diff %t.gnu.default %t.gnu.nodemangle
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# GNU-COMMON: Relocation section '.rela.text.foo' at offset {{.*}} contains 1 entries:
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# GNU-COMMON-NEXT: Offset Info Type Symbol's Value Symbol's Name + Addend
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# GNU-DEMANGLE-NEXT: foo(char){{ }}
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# GNU-MANGLED-NEXT: _Z3fooc{{ }}
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# GNU-COMMON: 'RELA' relocation section at offset {{.*}} contains 24 bytes:
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# GNU-COMMON-NEXT: Offset Info Type Symbol's Value Symbol's Name + Addend
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# GNU-DEMANGLE-NEXT: foo(int){{ }}
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# GNU-MANGLED-NEXT: _Z3fooi{{ }}
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# GNU-COMMON: Symbol table '.dynsym' contains 2 entries:
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# GNU-COMMON-NEXT: Num: Value Size Type Bind Vis Ndx Name
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# GNU-COMMON-NEXT: 0: 0000000000000000 0 NOTYPE LOCAL DEFAULT UND
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# GNU-DEMANGLE-NEXT: foo(int){{$}}
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# GNU-MANGLED-NEXT: _Z3fooi{{$}}
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# GNU-COMMON: Symbol table '.symtab' contains 3 entries:
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# GNU-COMMON-NEXT: Num: Value Size Type Bind Vis Ndx Name
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# GNU-COMMON-NEXT: 0: 0000000000000000 0 NOTYPE LOCAL DEFAULT UND
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# GNU-DEMANGLE-NEXT: foo(char){{$}}
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# GNU-DEMANGLE-NEXT: blah(float){{$}}
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# GNU-MANGLED-NEXT: _Z3fooc{{$}}
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# GNU-MANGLED-NEXT: _Z4blahf{{$}}
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# GNU-COMMON: COMDAT group section [{{.*}}] `.group'
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# GNU-DEMANGLE-SAME: [foo(char)]
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# GNU-MANGLED-SAME: [_Z3fooc]
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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_DYN
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Machine: EM_X86_64
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Sections:
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## TODO: Replace the raw section contents with more meaningful dynamic
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## tags/symbols/etc, once yaml2obj supports it.
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## FIXME: yaml2obj does not currently allow custom addresses for .dynstr and
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## .dynsym if DynamicSymbols are specified.
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## See https://bugs.llvm.org/show_bug.cgi?id=40339
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- Name: .dynstr
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Type: SHT_STRTAB
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Flags: [ SHF_ALLOC ]
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AddressAlign: 0x100
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EntSize: 0x1
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## "\0_Z3fooi\0"
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Content: "005f5a33666f6f6900"
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- Name: .dynsym
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Type: SHT_DYNSYM
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Flags: [ SHF_ALLOC ]
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Link: .dynstr
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Address: 0x100
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AddressAlign: 0x100
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EntSize: 0x18
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## Null symbol;
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## st_name: 1; st_info: Global | Func; st_other: 0;
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## st_shndx: .text.foo; st_value: 0x2000; st_size: 0
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Content: "000000000000000000000000000000000000000000000000010000001200050000200000000000000000000000000000"
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- Name: .rela.dyn
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Type: SHT_RELA
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Flags: [ SHF_ALLOC ]
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Link: .dynsym
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Info: .text.foo
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Address: 0x200
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AddressAlign: 0x100
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EntSize: 0x18
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Relocations:
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- Offset: 0x10
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## FIXME: This should be a lookup in the corresponding symbol table, not necessarily the static symbol table.
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## See https://bugs.llvm.org/show_bug.cgi?id=40337.
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Symbol: _Z3fooc
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Type: R_X86_64_PC32
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Addend: 0x4
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- Name: .dynamic
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Type: SHT_DYNAMIC
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Flags: [ SHF_ALLOC ]
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Address: 0x0000000000001000
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Link: .dynstr
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AddressAlign: 0x0000000000001000
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EntSize: 0x0000000000000010
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Entries:
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- Tag: DT_STRTAB
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Value: 0x0000000000000000
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- Tag: DT_STRSZ
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Value: 0x0000000000000009
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- Tag: DT_SYMTAB
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Value: 0x0000000000000100
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- Tag: DT_SYMENT
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Value: 0x0000000000000018
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- Tag: DT_RELA
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Value: 0x0000000000000200
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- Tag: DT_RELASZ
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Value: 0x0000000000000018
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- Tag: DT_RELAENT
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Value: 0x0000000000000018
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- Tag: DT_NULL
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Value: 0x0000000000000000
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- Name: .text.foo
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Type: SHT_PROGBITS
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Flags: [ SHF_ALLOC, SHF_EXECINSTR, SHF_GROUP ]
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Size: 0x40
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Address: 0x2000
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AddressAlign: 0x2000
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- Name: .group
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Type: SHT_GROUP
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Link: .symtab
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Info: _Z3fooc
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Members:
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- SectionOrType: GRP_COMDAT
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- SectionOrType: .text.foo
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- Name: .rela.text.foo
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Type: SHT_RELA
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Link: .symtab
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Info: .text.foo
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Relocations:
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- Offset: 0x10
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Symbol: _Z3fooc
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Type: R_X86_64_PC32
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- Name: .llvm.call-graph-profile
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Type: SHT_LLVM_CALL_GRAPH_PROFILE
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Link: .symtab
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EntSize: 16
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Content: "01000000020000002000000000000000"
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- Name: .llvm_addrsig
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Type: SHT_LLVM_ADDRSIG
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Link: .symtab
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Content: "0102"
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Symbols:
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Global:
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- Name: _Z3fooc
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Type: STT_FUNC
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Section: .text.foo
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- Name: _Z4blahf
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Type: STT_FUNC
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Section: .text.foo
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ProgramHeaders:
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- Type: PT_LOAD
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Flags: [ PF_R, PF_X ]
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VAddr: 0x0
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PAddr: 0x0
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Sections:
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- Section: .dynsym
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- Section: .dynstr
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- Section: .rela.dyn
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- Section: .dynamic
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- Section: .text.foo
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- Type: PT_DYNAMIC
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Flags: [ PF_R ]
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VAddr: 0x1000
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PAddr: 0x1000
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Sections:
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- Section: .dynamic
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