CODEWITHSUNDEEP
linuxcompiler-constructionkernelelf
agent.smith
agent.smith

Reputation: 9426

global offset table structure

How does structure of global offset table(ELF) look. I am trying to understand dynamic linking. Can any one tell how got data structure looks. I somehow never found it online.

Upvotes: 5

Views: 2458

Answers (1)

Dan Fego
Dan Fego

Reputation: 13994

This is OS and platform-specific, but for x86/x64 Linux, the Global Offset Table is just a bunch of function addresses. There's one entry for each symbol in it. Before symbols are resolved, the addresses (for functions) point back into the Procedure Linkage Table (PLT), but are then updated to point to the actual function locations.

Upvotes: 4

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