VirtualAlloc align 16 ?

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Roman

Joined: 21 Apr 2012
Posts: 1878

Roman 29 Jul 2024, 08:42

I do VirtualAlloc 20 000 000 bytes
And get address.
But how align 16 this address ?
I want using see movaps.

29 Jul 2024, 08:42

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20520
Location: In your JS exploiting you and your system

revolution 29 Jul 2024, 08:46

Works for me.

Code:

virtual at 0
align 16
end virtual

29 Jul 2024, 08:46

Roman

Joined: 21 Apr 2012
Posts: 1878

Roman 29 Jul 2024, 08:47

This not help me.
Because invoke VirtualAlloc function win api.

Last edited by Roman on 29 Jul 2024, 08:49; edited 1 time in total

29 Jul 2024, 08:47

Roman

Joined: 21 Apr 2012
Posts: 1878

Roman 29 Jul 2024, 08:48

I needed something like this:
and esp, 0FFFFFFF0h

29 Jul 2024, 08:48

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20520
Location: In your JS exploiting you and your system

revolution 29 Jul 2024, 08:51

In Windows VirtualAlloc is at page granularity. So it is aligned to 4k. 16 is a subset of 4k is it is already aligned.

29 Jul 2024, 08:51

Roman

Joined: 21 Apr 2012
Posts: 1878

Roman 29 Jul 2024, 09:13

Its nice.

29 Jul 2024, 09:13

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