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FreeBSD returns main object handle from dlopen(NULL, ...) calls.

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dlsym seaches using this handle are expected to look for symbol
definitions in all objects loaded at the program start time along
with all objects currently in RTLD_GLOBAL scope.

Discussed with: kib
Reported by:	Maho NAKATA
MFC after:	2 weeks
This commit is contained in:
Alexander Kabaev 2009-06-16 16:38:54 +00:00
parent 5d54b264b7
commit 1310f23766
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=194298
1 changed files with 10 additions and 0 deletions
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10
libexec/rtld-elf/rtld.c
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@ -2130,6 +2130,16 @@ do_dlsym(void *handle, const char *name, void *retaddr, const Ver_Entry *ve,
/* Search main program and all libraries loaded by it. */
def = symlook_list(name, hash, &list_main, &defobj, ve, flags,
&donelist);
/*
* We do not distinguish between 'main' object an global scope.
* If symbol is not defined by objects loaded at startup, continue
* search among dynamically loaded objects with RTLD_GLOBAL
* scope.
*/
if (def == NULL)
def = symlook_list(name, hash, &list_global, &defobj, ve,
flags, &donelist);
} else {
Needed_Entry fake;