Date: Sun, 29 Aug 1999 18:48:19 -0700 (PDT) From: John Polstra <jdp@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/libexec/rtld-elf map_object.c rtld.c rtld.h src/libexec/rtld-elf/alpha reloc.c Message-ID: <199908300148.SAA51932@freefall.freebsd.org>
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jdp 1999/08/29 18:48:19 PDT
Modified files:
libexec/rtld-elf map_object.c rtld.c rtld.h
libexec/rtld-elf/alpha reloc.c
Log:
Revamp the symbol lookup algorithm to cope better with objects
loaded separately by dlopen that have global symbols with identical
names. Viewing each dlopened object as a DAG which is linked by its
DT_NEEDED entries in the dynamic table, the search order is as
follows:
* If the referencing object was linked with -Bsymbolic, search it
internally.
* Search all dlopened DAGs containing the referencing object.
* Search all objects loaded at program start up.
* Search all objects which were dlopened() using the RTLD_GLOBAL
flag (which is now supported too).
The search terminates as soon as a strong definition is found.
Lacking that, the first weak definition is used.
These rules match those of Solaris, as best I could determine them
from its vague manual pages and the results of experiments I performed.
PR: misc/12438
Revision Changes Path
1.5 +38 -2 src/libexec/rtld-elf/map_object.c
1.34 +193 -78 src/libexec/rtld-elf/rtld.c
1.9 +16 -3 src/libexec/rtld-elf/rtld.h
1.8 +2 -3 src/libexec/rtld-elf/alpha/reloc.c
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