CODEWITHSUNDEEP
assemblyreverse-engineering
user3639274
user3639274

Reputation: 1

asm : @prefix followed by a number. Explain when and why this decoration exists

In some of the assembly listings, the function name has a @prefix followed by a number. Explain when and why this decoration exists.

Upvotes: 0

Views: 307

Answers (1)

Jester
Jester

Reputation: 58762

If you actually mean suffix instead of prefix, and you happen to be on windows, then the @number indicates it is a function using stdcall convention expecting the given number of bytes as arguments which will be removed from the stack by the callee (normally using a ret number instruction). It is important that caller and callee agree on the argument sizes otherwise the stack will become unbalanced. This is why somebody thought it may be a good idea to encode the size in the symbol itself.

Upvotes: 2

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