[Bug 214972] rtld relies on non-zero _DYNAMIC GOT entry (on !sparc64)
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Fri Dec 2 14:24:02 UTC 2016
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=214972
--- Comment #3 from commit-hook at freebsd.org ---
A commit references this bug:
Author: emaste
Date: Fri Dec 2 14:23:27 UTC 2016
New revision: 309411
URL: https://svnweb.freebsd.org/changeset/base/309411
Log:
Retire long-broken/unused static rtld support
rtld-elf has some vestigial support for building as a static executable.
r45501 introduced a partial implementation with a prescient note that it
"might never be enabled." r153515 introduced ELF symbol versioning
support, and removed part of the unused build infrastructure for static
rtld.
GNU ld populates rela relocation addends and GOT entries with the same
values, and rtld's run-time dynamic executable check relied on this.
Alternate toolchains may not populate the GOT entries, which caused
RTLD_IS_DYNAMIC to return false. Simplify rtld by just removing the
unused check.
If we want to restore static rtld support later on we ought to introduce
a build-time #ifdef flag.
PR: 214972
Reviewed by: kan
MFC after: 1 month
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D8687
Changes:
head/libexec/rtld-elf/aarch64/rtld_machdep.h
head/libexec/rtld-elf/riscv/rtld_machdep.h
head/libexec/rtld-elf/rtld.c
head/libexec/rtld-elf/sparc64/rtld_machdep.h
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