Date: Wed, 08 Oct 2008 14:36:42 -0700 From: Maxim Sobolev <sobomax@FreeBSD.org> To: Alexander Kabaev <kan@FreeBSD.org> Cc: "current@freebsd.org" <current@FreeBSD.org> Subject: dlsym(RTLD_NEXT) and weak symbols Message-ID: <48ED27EA.9020407@FreeBSD.org>
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Hi,
I am not sure if it has even worked correctly, but calling
dlsym("dlopen", RTLD_NEXT) returns reference to the dlopen() function in
the libc, not reference to dlopen() function in the ld-elf.so. The
attempt to call this function then fails, since dlopen() in libc is just
a stub to make static linking happy.
#pragma weak dlopen
void *
dlopen(const char *name, int mode)
{
_rtld_error(sorry);
return NULL;
}
IMHO this is incorrect and is probably part of the bigger problem. The
dlsym(3) should return first non-weak symbol instead.
-Maxim
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