Hi,
The behaviour of weak undef thread-local variables is not well defined.
TLS relocations against weak undef symbols are not handled properly by
the linker, and in some cases cause the linker to crash (notably when
linking glibc for purecap Morello). This patch simply ignores these and
emits a warning to that effect. This is a compromise to enable progress
for Morello.
Regression tested an aarch64-none-elf cross, OK for
users/ARM/morello-binutils-gdb-master?
Thanks,
Alex
bfd/ChangeLog:
2021-12-08 Alex Coplan <alex.coplan(a)arm.com>
* elfnn-aarch64.c (elfNN_aarch64_relocate_section): Skip over TLS
relocations against weak undef symbols.
(elfNN_aarch64_check_relocs): Likewise, but also warn.
ld/ChangeLog:
2021-12-08 Alex Coplan <alex.coplan(a)arm.com>
* testsuite/ld-aarch64/aarch64-elf.exp: Add morello-weak-tls test.
* testsuite/ld-aarch64/morello-weak-tls.d: New test.
* testsuite/ld-aarch64/morello-weak-tls.s: New test.
* testsuite/ld-aarch64/weak-tls.d: Update test wrt new behaviour.
