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ProMiNick



Joined: 24 Mar 2012
Posts: 642
Location: Russian Federation, Sochi
ProMiNick
Quote:
[-] The assembler should no longer prematurely abort when sign-extended 32-bit
value in 64-bit instruction overflows during intermediate passes.


Is that mean such tricks are not required anymore:
Code:
HRESULT equ -$80000000+$80000000 xor
E_PENDING                       = HRESULT($8000000A)    

we could pass $8000000A instead of $FFFFFFFF8000000A

Am I understand this correctly?

but this still dosn`t work:
Code:
use64
push $8000000A    

required
Code:
use64
push $FFFFFFFF8000000A    

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Post 08 Jul 2021, 06:38
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 18222
Location: In your JS exploiting you and your system
revolution
While values are still being refined during the initial passes the overflows are ignored.

The assembler will still abort on the final pass when sign-extended 32-bit value in 64-bit instruction overflows.

It is still impossible to push 0x80000000 in 64-bit mode, there is no byte sequence that can encode that.
Post 08 Jul 2021, 06:45
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