Question about Objective C calling convention and argument passing on ARM

Posted by overboming on Stack Overflow See other posts from Stack Overflow or by overboming
Published on 2010-03-14T13:25:56Z Indexed on 2010/03/14 13:35 UTC
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iphone

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arm

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compiler

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assembly

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calling-convention

I want to know how objective C runtime handle arguments when I call a objective C method like

[NSString stringWithFomat:@"%@, %@", @"Hello", @"World"]

There are three arguments for this objective C call, how does it work compared to typical way on a ARM system. I have known register r0, r1, r2, r3 will hold first 4 arguments, how about there are additional arguments? How does it put them on a stack and pop them later?

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I want to know how objective C runtime handle arguments when I call a objective C method like [NSString stringWithFomat:@"%@, %@", @"Hello", @"World"] There are three arguments for this objective C call, how does it work compared to typical way on a ARM system. I have known register r0, r1, r2… >>> More