asm trouble

["Jérôme M. Berger"]

Walter Bright wrote:
> Vladimir A. Reznichenko wrote:
>> So the question is why the call instruction drops register values?
> 
> The call instruction doesn't drop anything, it just does a call. What is 
> happening is the rotateLeft function is using ECX for something else. 
> The EAX, ECX, and EDX registers are (by convention) not preserved across 
> function calls.

	AIUI, that would not cause an access violation, it would only cause 
the returned value to be wrong. My question would be: does the 
rotateLeft function pop its arguments from the stack? If it doesn't, 
then "pop EDX" will actually put "sh" into EDX instead of the 
address of "a"...

		Jerome
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