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| H A D | ta_elf_rel.c | cf830b2b674ccc672d0124425714da7cae27c303 Tue Jul 21 08:54:55 UTC 2020 Jerome Forissier <jerome@forissier.org> ldelf: add support for weak symbols
Preparing for C++ support in TAs.
When ldelf performs a symbol lookup in a TA, it currently considers
only global symbols that are not undefined. It turns out that g++ can
generates dynamic relocations referencing symbols that are weak and
undefined [1], in other words: weak declarations. Those should end up
resolving to zero.
This commit updates the symbol resolution to first look for global
defined symbols, then weak defined, then weak undefined.
[1] __pthread_key_create, pthread_mutex_lock, pthread_mutex_unlock,
__gnu_Unwind_Find_exidx.
Signed-off-by: Jerome Forissier <jerome@forissier.org>
Acked-by: Etienne Carriere <etienne.carriere@linaro.org>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
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