mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-25 04:02:41 +01:00
c38aa8169e
This patch adds initial support for reading dynamic symbols from ELF binaries. Currently, STT_NOTYPE, STT_OBJECT, STT_FUNC, and STT_TLS are explicitly supported. Other symbol types are mapped to ELFSymbolType::Unknown to improve signal/noise ratio. Symbols must meet two criteria to be read into in an ELFStub: - The symbol's binding must be STB_GLOBAL or STB_WEAK. - The symbol's visibility must be STV_DEFAULT or STV_PROTECTED. This filters out symbols that aren't of interest during compile-time linking against a shared object. This change uses DT_HASH and DT_GNU_HASH to determine the size of .dynsym. Using hash tables to determine the number of symbols in .dynsym allows llvm-elfabi to work on binaries without relying on section headers. Differential Revision: https://reviews.llvm.org/D56031 llvm-svn: 352121
50 lines
1.5 KiB
Plaintext
50 lines
1.5 KiB
Plaintext
# RUN: yaml2obj %s > %t
|
|
# RUN: llvm-elfabi --elf %t --emit-tbe=- | FileCheck %s --check-prefix=ORIGINAL
|
|
# RUN: llvm-elfabi --elf %t --emit-tbe=- --soname=libbest.so | FileCheck %s --check-prefix=REPLACED
|
|
|
|
!ELF
|
|
FileHeader:
|
|
Class: ELFCLASS64
|
|
Data: ELFDATA2LSB
|
|
Type: ET_DYN
|
|
Machine: EM_X86_64
|
|
Sections:
|
|
- Name: .dynstr
|
|
Type: SHT_STRTAB
|
|
Flags: [ SHF_ALLOC ]
|
|
Address: 0x1000
|
|
# \0 b a z\0 s o m e l i b . s o\0 f o o\0
|
|
Content: "0062617a00736f6d656c69622e736f00666f6f00"
|
|
- Name: .dynamic
|
|
Type: SHT_DYNAMIC
|
|
Flags: [ SHF_ALLOC ]
|
|
Address: 0x1018
|
|
AddressAlign: 8
|
|
Content: "0e0000000000000005000000000000000a000000000000001400000000000000050000000000000000100000000000000600000000000000001000000000000000000000000000000000000000000000"
|
|
# DT_SONAME 5 (0x05)
|
|
# DT_STRSZ 20 (0x14)
|
|
# DT_STRTAB 0x1000
|
|
# DT_SYMTAB 0x1000
|
|
# DT_NULL 0x0
|
|
Size: 80
|
|
Link: .dynstr
|
|
ProgramHeaders:
|
|
- Type: PT_LOAD
|
|
Flags: [ PF_R ]
|
|
VAddr: 0x1000
|
|
PAddr: 0x1000
|
|
Align: 8
|
|
Sections:
|
|
- Section: .dynstr
|
|
- Section: .dynamic
|
|
- Type: PT_DYNAMIC
|
|
Flags: [ PF_X, PF_R ]
|
|
VAddr: 0x1018
|
|
PAddr: 0x1018
|
|
Sections:
|
|
- Section: .dynamic
|
|
|
|
# ORIGINAL: SoName: somelib.so{{$}}
|
|
|
|
# REPLACED: SoName: libbest.so{{$}}
|