[solved] rip-relative overflow must be recoverable

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l_inc

Joined: 23 Oct 2009
Posts: 881

l_inc 30 Jan 2016, 01:16

Here's an example for the problem:

Code:

use64
org $100000000-(endofmov-startofmov)
startofmov:
mov al,[$80000000]
endofmov:

The unrecoverable error prevents fasm from doing the second pass and this way understanding that $80000000 is still in range. A similar bug has already been fixed before.

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Faith is a superposition of knowledge and fallacy

30 Jan 2016, 01:16

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20445
Location: In your JS exploiting you and your system

revolution 30 Jan 2016, 04:10

Indeed. This compiles:

Code:

use64
org 1 shl 32 - 6
mov al,[1 shl 31]

And I can't see any reason why it wouldn't be resolved using the normal rules.

30 Jan 2016, 04:10

Tomasz Grysztar

Joined: 16 Jun 2003
Posts: 8358
Location: Kraków, Poland

Tomasz Grysztar 30 Jan 2016, 11:31

Please check if I got it right in 1.71.50.

30 Jan 2016, 11:31

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20445
Location: In your JS exploiting you and your system

revolution 30 Jan 2016, 14:37

OMG, fasm's first ever internal usage of @@ Shocked

30 Jan 2016, 14:37

Tomasz Grysztar

Joined: 16 Jun 2003
Posts: 8358
Location: Kraków, Poland

Tomasz Grysztar 30 Jan 2016, 15:03

That might have been a bit of laziness from my side. Wink

30 Jan 2016, 15:03

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20445
Location: In your JS exploiting you and your system

revolution 30 Jan 2016, 15:12

One of the main tenets of computer programming is the notion that naming things is hard. Razz

30 Jan 2016, 15:12

l_inc

Joined: 23 Oct 2009
Posts: 881

l_inc 30 Jan 2016, 16:26

Tomasz Grysztar
Seems like working flawlessly now. Thank you.

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Faith is a superposition of knowledge and fallacy

30 Jan 2016, 16:26

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