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Index > Main > bit of a noobish question but..

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hckr83



Joined: 12 Nov 2006
Posts: 86
Location: usa
hckr83
well I'm having trouble making sure I understand this right

does int, in 32bit work like this:
int=
push ss
push esp
pushf
push cs
push eip

or is it reversed...can't figure it out right now..

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Post 28 Dec 2006, 01:07
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m



Joined: 28 Dec 2006
Posts: 304
Location: in
m
Have you studied Intel's Software Developer Manuals ?
They contain a lot more information than this !
Post 28 Dec 2006, 08:51
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MCD



Joined: 21 Aug 2004
Posts: 604
Location: Germany
MCD
hckr83 wrote:
well I'm having trouble making sure I understand this right

does int, in 32bit work like this:
int=
push ss
push esp
pushf
push cs
push eip

or is it reversed...can't figure it out right now..

Usually, this depends on what int is "invoked", cause some push an additionally dword, some kind of status-code (don't know how Intel's manual calls these).

Also, they optionally do context-switching with task-gates/traps and so on. You got stuff like task state segments, where the state of the task can be saved during task switch and finally task state registers.

Maybe I'm partially wrong/incomplete, but it's been a while since I last needed that stuff.

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Post 28 Dec 2006, 15:03
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hckr83



Joined: 12 Nov 2006
Posts: 86
Location: usa
hckr83
since you didn't say I was wrong, guess I'm right..
task-gates and such I'm not worrying about yet(maybe even ever..) and the status code thing is pushed only on some things(GP and SF I think..)

also I'm doing software task-switching...think it's easier to do

Quote:

Have you studied Intel's Software Developer Manuals ?
They contain a lot more information than this !

yea I did but the only thing I could get was their pseudo-code and it's over 4 pages long and can't find the right thing in it..
Post 28 Dec 2006, 18:25
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