Re: Adding custom code to the .init section of a library

Priya Narasimhan (priya@alpha.ece.ucsb.edu) wrote:
: On a SPARC Solaris 2.x machine, I am able to add custom code
: to the .init section of a library using


: #pragma init (blah-blah)


: where blah-blah() is written in C code. How can I do this on
: an Intel machine running RedHatLinux 6.0 with gcc? I tried the
: #pragma init, and it did not work. I really would like to add
: something to the .init section so that every executable that
: links with my library can take advantage of the custom code
: within the library.


According to the dlopen manpage, you might be able to achieve the
same effect by defining a void _init(void) function in your library:


"If the library exports a routine named _init, then that code is
executed before dlopen returns."


This is probably specific to dlopen, however, and it may not be
that the libdl library (of which dlopen is a part) is unilaterally
used to load .so files.


Mike
--
Michael Hicks
Ph.D. Candidate, the University of Pennsylvania
mwh@gradient.cis.upenn.edu
[I looked at the BSD/OS dlopen() which is derived from the Linux one, and
I don't see anything that does that. -John]

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