x64 exception handling logic?

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ProMiNick

Joined: 24 Mar 2012
Posts: 821
Location: Russian Federation, Sochi

ProMiNick 11 Nov 2018, 10:03

https://board.flatassembler.net/topic.php?p=206568#206568

1st post part ATL.DLL and it exported AtlModuleInit

exception handling realized differently for x86 & x64.
for x86 - CPPEH_RECORD via fs:[0] with _SCOPETABLE

for x64 - after error suspecting call added just 1 jmp instruction that skipped some way in case of exception occurs.

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11 Nov 2018, 10:03

Feryno

Joined: 23 Mar 2005
Posts: 518
Location: Czech republic, Slovak republic

Feryno 13 Nov 2018, 08:14

exception handling in 32 bit is per thread, you have to setup it in thread registers - fs:0
exception handling in x64 is per process, info about handling exceptions is in exception directory in executable binary

13 Nov 2018, 08:14

Furs

Joined: 04 Mar 2016
Posts: 2689

Furs 15 Nov 2018, 19:36

x64 exception handling is very complicated. Be prepared for hell.

15 Nov 2018, 19:36

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