How to jump to last to last caller function...

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Hi,

Let suppose there is a function a() which will call function b() and b() will call c() now for some reason I want to return from c() to a() without going via b().

void c()
{
   /* want to return to a() from here without going via b() */
}

void b()
{
    c();
}

void a()
{
    b();
}

How can we do it in c.

Can we do something like passing the address one word after the place b() is called and go to the address but in this case we have not returned from c().

Could you please answer this.

Thanks
vikas

Posted 6-Sep-10 21:22pm

vikasvds

Updated 6-Sep-10 21:27pm

Dalek Dave

v2

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Dalek Dave 7-Sep-10 3:27am

Edited for Grammar and Code Block.

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Aescleal · Accepted Answer · 2010-09-06T22:02:00

setjmp and longjmp will do the sort of thing you want to do. However it's probably better to restructure your code to return normally using a return code than non-local jumping.

Don't do something mad like trying to manually jump somewhere as it'll probably end in tears with a screwed stack (unless you really know what you're doing in which case you wouldn't be asking the question).

Cheers,

Ash