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Restore modified value in [DISABLE] section

 
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k4sh
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Joined: 01 Mar 2016
Posts: 28
PostPosted: Tue Mar 01, 2016 4:39 pm    Post subject: Restore modified value in [DISABLE] section Reply with quote
Hello There,

Here is a sample of my code where i modify a value in memory

Code:

[ENABLE]

Original_UI_Size:
  dd (float)64

... do some code
movss [rdx+120],xmm2               // We change the UI size in memory
... do some code




What i would like to do is to restore the original value in rdx + offset register in [DISABLE] section.
Some kind of opcode that may looks like
movss [rdx+120], my original value in Original_UI_Size

How can i do this

Any help appreciated
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Zanzer
I post too much
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Joined: 09 Jun 2013
Posts: 3278
PostPosted: Tue Mar 01, 2016 6:25 pm    Post subject: Reply with quote
Code:
[ENABLE]
label(ui_backup)
...
movss [rdx+120],xmm2
mov [ui_backup],rdx
jmp return

ui_backup:
  dq 0
...
registersymbol(ui_backup)
[DISABLE]
{$lua}
local ptr = readPointer("ui_backup")
if ptr ~= 0 then
  writeFloat(ptr + 0x120, 64)
end
{$asm}
...
unregistersymbol(ui_backup)
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k4sh
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Joined: 01 Mar 2016
Posts: 28
PostPosted: Wed Mar 02, 2016 3:00 am    Post subject: Reply with quote
Thanks, i'll give a shot tonight.

I can understand the lua script but what is the the {$asm} line for ?
Is it aimed to introduce new opcodes ?
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k4sh
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Joined: 01 Mar 2016
Posts: 28
PostPosted: Wed Mar 02, 2016 1:17 pm    Post subject: Reply with quote
Ok it works like a charm. The only thing is that the following code doesn't compile. It executes however.

Code:

writeFloat(ptr + 0x120, 64)
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