CODEWITHSUNDEEP
assemblyx86
Juicy
Juicy

Reputation: 12530

Subtract 8 bits or 8 bytes from the Stack Pointer?

I'm very new to asm,

does this:

sub $0x8, %esp

subtract 8 bits or 8 bytes from the stack pointer?

Upvotes: 2

Views: 3575

Answers (1)

Sam
Sam

Reputation: 1912

Assuming it as IA-32 assembly on gnu tool chain, with at&t syntax, It subtracts 8 Bytes from the stack pointer...

That means your stack grows 8 Bytes downwards, allowing you to store more 8 Bytes of data there.

Also refer H2CO3's comment. It has the correct perspective that you don't subtract bits or bytes, but just a number and as pointers point to a byte, it points 8 bytes below.

Upvotes: 2

Related Questions