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authorJulian Brown <julian@codesourcery.com>2014-04-30 16:17:59 +0000
committerJoseph Myers <joseph@codesourcery.com>2014-04-30 16:17:59 +0000
commit60c8f1f60b45fb5ba02a0f76ff4b9fda203935e5 (patch)
treea2a09590b09d8d191392b1a9bc958167c321cbce /ChangeLog.old-ports-alpha
parentd0f5b3f851cfced84e3228977eb8dfdc9c607231 (diff)
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ARM: Fix R_ARM_IRELATIVE RELA relocations.
This patch fixes what I believe to be a bug in the handling of
R_ARM_IRELATIVE RELA relocations. At present, these are handled the
same as REL relocations: i.e. the addend is loaded from the relocation
address. Most of the time this isn't a problem because RELA relocations
aren't used on ARM (GNU/Linux at least) anyway, but it causes problems
with prelink, which uses RELA on all targets for its conflict table.
(Support for ifunc prelinking requires a prelink patch, not yet posted.)

Anyway, this patch works, though I'm not 100% sure if it is correct: I
notice that this code path received attention last year:

https://sourceware.org/ml/libc-ports/2013-07/msg00000.html

I'm not sure under what circumstances that patch would have had an
effect, nor if my patch conflicts with that case.

No regressions using Mentor's usual glibc cross-testing infrastructure.

	[BZ #16888]
	* sysdeps/arm/dl-machine.h (elf_machine_rela): Fix R_ARM_IRELATIVE
	handling.
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