Skip to main content

Loading the code workspace…

LC

Parse the ELF Symbol Table

hard6/10

Extract and Print the .text Section Bytes Extract Function Names from DWARF Debug Info

Language

Compiler

2.0s Limit 256MB

Submit and pass all tests to enable saving to GitHub.

Implementation

Implement an ELF symbol table parser in C.

Requirements:

Define Elf64_Sym structure
Parse symbol entries from a simulated or real .symtab
Resolve symbol names using the associated .strtab
Print name, value, size, type, binding, visibility, and section
Show local vs global vs weak bindings
Show FUNC vs OBJECT vs NOTYPE
Handle undefined symbols (shndx = SHN_UNDEF = 0)
Print a summary of symbol counts by type and binding

Test:

Show all symbols
Show correct types and bindings
Show undefined symbols (like printf)
Show summary counts

Why This Matters

`nm` and `readelf -s` expose exactly the st_info type/binding split you are decoding, and the dynamic linker (ld.so) uses these same STB_GLOBAL/STB_WEAK rules to resolve symbols like printf across shared libraries at runtime. Reverse engineers use surviving .dynsym entries to reconstruct a stripped binary's API surface when .symtab has been removed.

Hints

0 / 3 revealed

Validation Suite

main.c

Workspace 1.0

← Extract and Print the .text Section BytesExtract Function Names from DWARF Debug Info →