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[ObjectYAML][ELF] Let the endianness of DWARF sections be inferred from FileHeader. 

This patch helps infer the endianness of DWARF sections from `FileHeader`.

Reviewed By: jhenderson, grimar

Differential Revision: https://reviews.llvm.org/D81051
This commit is contained in:
Xing GUO 2020-06-04 09:25:26 +08:00
parent a50f4eb2e9
commit b6020c330d
2 changed files with 66 additions and 2 deletions
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3
llvm/lib/ObjectYAML/ELFYAML.cpp
View File

@ -1654,6 +1654,9 @@ void MappingTraits<ELFYAML::Object>::mapping(IO &IO, ELFYAML::Object &Object) {
IO.mapOptional("Symbols", Object.Symbols);
IO.mapOptional("DynamicSymbols", Object.DynamicSymbols);
IO.mapOptional("DWARF", Object.DWARF);
if (Object.DWARF)
Object.DWARF->IsLittleEndian =
Object.Header.Data == ELFYAML::ELF_ELFDATA(ELF::ELFDATA2LSB);
IO.setContext(nullptr);
}

65
llvm/test/tools/yaml2obj/ELF/DWARF/debug-aranges.yaml
View File

@ -4,8 +4,8 @@
## Generate and verify a big endian object file.
# RUN: yaml2obj --docnum=1 -DENDIAN=ELFDATA2MSB %s -o %t1.o
# RUN: llvm-readobj --sections --section-data %t1.o | \
# RUN: yaml2obj --docnum=1 -DENDIAN=ELFDATA2MSB %s -o %t.be.o
# RUN: llvm-readobj --sections --section-data %t.be.o | \
# RUN: FileCheck %s -DADDRALIGN=1 -DSIZE=96 --check-prefixes=DWARF-BE-HEADER,DWARF-BE-CONTENT
# DWARF-BE-HEADER: Index: 1
@ -90,6 +90,67 @@ DWARF:
- Address: 0x0000000056780000
Length: 0x10
## Generate and verify a little endian object file.
# RUN: yaml2obj --docnum=1 -DENDIAN=ELFDATA2LSB %s -o %t.le.o
# RUN: llvm-readobj --sections --section-data %t.le.o | \
# RUN: FileCheck %s --check-prefixes=DWARF-LE-DEFAULT
# DWARF-LE-DEFAULT: Section {
# DWARF-LE-DEFAULT: Index: 1
# DWARF-LE-DEFAULT-NEXT: Name: .debug_aranges (1)
# DWARF-LE-DEFAULT-NEXT: Type: SHT_PROGBITS (0x1)
# DWARF-LE-DEFAULT-NEXT: Flags [ (0x0)
# DWARF-LE-DEFAULT-NEXT: ]
# DWARF-LE-DEFAULT-NEXT: Address: 0x0
# DWARF-LE-DEFAULT-NEXT: Offset: 0x40
# DWARF-LE-DEFAULT-NEXT: Size: 96
# DWARF-LE-DEFAULT-NEXT: Link: 0
# DWARF-LE-DEFAULT-NEXT: Info: 0
# DWARF-LE-DEFAULT-NEXT: AddressAlignment: 1
# DWARF-LE-DEFAULT-NEXT: EntrySize: 0
# DWARF-LE-DEFAULT-NEXT: SectionData (
# DWARF-LE-DEFAULT-NEXT: 0000: 2C000000 02000000 00000400 00000000
## | | | | | |
## | | | | | +------- Padding zeros (4-byte)
## | | | | +- SegSize (1-byte) 0x00
## | | | +- AddrSize (1-byte) 0x04
## | | +-------- CuOffset (4-byte) 0x00
## | +--- Version (2-byte) 0x02
## +------- InitialLength (4-byte) 0x2c
##
# DWARF-LE-DEFAULT-NEXT: 0010: 34120000 20000000 00000000 00000000
## | | |
## | | +---------------- Terminating Entry
## | +------- Length (4-byte) 0x20
## +------- Address (4-byte) 0x1234
##
# DWARF-LE-DEFAULT-NEXT: 0020: 2C000000 02006500 00000800 00000000
## | | | | | |
## | | | | | +------- Padding zeros (4-byte)
## | | | | +- SegSize (1-byte) 0x00
## | | | +- AddrSize (1-byte) 0x08
## | | +-------- CuOffset (4-byte) 0x00
## | +--- Version (2-byte) 0x02
## +------- InitialLength (4-byte) 0x2c
##
# DWARF-LE-DEFAULT-NEXT: 0030: 78560000 00000000 20000000 00000000
## | |
## | +---------------- Length (8-byte) 0x20
## +---------------- Address (8-byte) 0x5678
##
# DWARF-LE-DEFAULT-NEXT: 0040: 00007856 00000000 10000000 00000000
## | |
## | +---------------- Length (8-byte) 0x10
## +---------------- Address (8-byte) 0x5678
##
# DWARF-LE-DEFAULT-NEXT: 0050: 00000000 00000000 00000000 00000000
## |
## +---------------------------------- Terminating entry
##
# DWARF-LE-DEFAULT-NEXT: )
# DWARF-LE-DEFAULT-NEXT: }
## b) Generate the .debug_aranges section from raw section content.
# RUN: yaml2obj --docnum=2 %s -o %t2.o