Introduction to x64 Assembly

[deroko]

Well I would love to have those inline asm markers in the code I've tried to use instrinsic to achive same but during optimization, my macros are gone, mixed with other instructions when optimized and officially I hate to use imports as markers, as it adds extra work on my side which by default wouldn't be needed. (eg. walk import table, and remove IID which points to my fake_import_marker.dll), and also there is always chance that searching for call dword ptr[mymarker_start] can lead to wrong data, and wrong analyse

However everybody should know whom are developing using asm on x64 that you must keep stack always 16 byte aligned, as some sse instructions require memory to be 16 byte aligned when data is written to memory, otherwise you will get exception. I learnt this in hard way, after 1h debugging why application crashed when writing to existing and r/w memory from some API call (don't even remember what API this was)