Re: Urgent: Help needed Behavior of Sun Linker and loader

From: Casper H.S. Dik (Casper.Dik_at_Sun.COM)
Date: 01/17/04 

Date: 17 Jan 2004 14:36:23 GMT

sunilsreenivas2001@yahoo.com (sunil) writes:

>Hi!
> I am building a server using many legacy libraries (shared
>objects).I have used LD_DEBUG=reloc,symbols,bindings,detail server and
>tried to understand how the loader setups process address space.I
>observed that even before actual references to functions are made,
>linker resolves the symbols. I referred to SUN manual and understood
>that loader does this as part of relocation processing. But I am not
>still clear about this. SUN is supposed to do lazy binding for
>function calls then why should it try to resolve any symbols before
>they get called. I observed that the function symbols that get
>resolved during relocation processing are of type:
>R_SPARC_GLOB_DAT,R_SPARC_WDISP30 (and these happen to the references
>(UNDEFINED) in the file whose relocation processing tries to resolve
>these symbols and load libraries that define these symbols). I read
>SUN manual for description but still its unclear.Does this not
>contradict what we expect on SUN's, lazybinding? This effectively
>results in memory space explosion and my server crashes even before
>entering main(). Any help/ideas/suggestion wuld be really appreciated.

All references to non-functions need to be resolved when the library
is loaded. (So they're undefined, non-functions)

Casper 

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