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Similar to commit 4fb55bf6a9606eb7b626c30a9f4e71d6c2d4fbb2 for aarch64.
Commit b68a20d6675f1360ea4db50a9835c073675b9889 changed ld to produce
R_ARM_GLOB_DAT but that defeated the purpose of protected visibility
as an optimization. Restore the previous behavior (which matches
ld.lld) by defining elf_backend_extern_protected_data to 0.
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* testsuite/ld-aarch64/aarch64-elf.exp: Run tests requiring pie
or shared library support only when check_shared_lib_support.
* testsuite/ld-aarch64/bti-pac-plt-1.d: Likewise.
* testsuite/ld-aarch64/bti-pac-plt-2.d: Likewise.
* testsuite/ld-aarch64/bti-plt-1.d: Likewise.
* testsuite/ld-aarch64/bti-plt-2.d: Likewise.
* testsuite/ld-aarch64/bti-plt-3.d: Likewise.
* testsuite/ld-aarch64/bti-plt-4.d: Likewise.
* testsuite/ld-aarch64/bti-plt-6.d: Likewise.
* testsuite/ld-aarch64/bti-plt-7.d: Likewise.
* testsuite/ld-aarch64/bti-warn.d: Likewise.
* testsuite/ld-aarch64/dt_textrel.d: Likewise.
* testsuite/ld-aarch64/emit-relocs-258-dyn-bad.d: Likewise.
* testsuite/ld-aarch64/emit-relocs-259-dyn-bad.d: Likewise.
* testsuite/ld-aarch64/emit-relocs-264-bad.d: Likewise.
* testsuite/ld-aarch64/emit-relocs-266-bad.d: Likewise.
* testsuite/ld-aarch64/emit-relocs-268-bad.d: Likewise.
* testsuite/ld-aarch64/emit-relocs-269-bad.d: Likewise.
* testsuite/ld-aarch64/emit-relocs-515-be.d: Likewise.
* testsuite/ld-aarch64/emit-relocs-515.d: Likewise.
* testsuite/ld-aarch64/emit-relocs-516-be.d: Likewise.
* testsuite/ld-aarch64/emit-relocs-516.d: Likewise.
* testsuite/ld-aarch64/farcall-b-plt.d: Likewise.
* testsuite/ld-aarch64/farcall-bl-plt.d: Likewise.
* testsuite/ld-aarch64/gc-plt-relocs.d: Likewise.
* testsuite/ld-aarch64/gc-relocs-257-dyn.d: Likewise.
* testsuite/ld-aarch64/ifunc-1-local.d: Likewise.
* testsuite/ld-aarch64/ifunc-1.d: Likewise.
* testsuite/ld-aarch64/ifunc-12.d: Likewise.
* testsuite/ld-aarch64/ifunc-13.d: Likewise.
* testsuite/ld-aarch64/ifunc-14a.d: Likewise.
* testsuite/ld-aarch64/ifunc-14b.d: Likewise.
* testsuite/ld-aarch64/ifunc-14c.d: Likewise.
* testsuite/ld-aarch64/ifunc-14d.d: Likewise.
* testsuite/ld-aarch64/ifunc-14e.d: Likewise.
* testsuite/ld-aarch64/ifunc-14f.d: Likewise.
* testsuite/ld-aarch64/ifunc-15.d: Likewise.
* testsuite/ld-aarch64/ifunc-16.d: Likewise.
* testsuite/ld-aarch64/ifunc-18a.d: Likewise.
* testsuite/ld-aarch64/ifunc-18b.d: Likewise.
* testsuite/ld-aarch64/ifunc-19a.d: Likewise.
* testsuite/ld-aarch64/ifunc-19b.d: Likewise.
* testsuite/ld-aarch64/ifunc-2-local.d: Likewise.
* testsuite/ld-aarch64/ifunc-2.d: Likewise.
* testsuite/ld-aarch64/ifunc-20.d: Likewise.
* testsuite/ld-aarch64/ifunc-21.d: Likewise.
* testsuite/ld-aarch64/ifunc-3a.d: Likewise.
* testsuite/ld-aarch64/ifunc-3b.d: Likewise.
* testsuite/ld-aarch64/ifunc-5b-local.d: Likewise.
* testsuite/ld-aarch64/ifunc-5b.d: Likewise.
* testsuite/ld-aarch64/ifunc-6b.d: Likewise.
* testsuite/ld-aarch64/ifunc-7b.d: Likewise.
* testsuite/ld-aarch64/ifunc-7c.d: Likewise.
* testsuite/ld-aarch64/pac-plt-1.d: Likewise.
* testsuite/ld-aarch64/pac-plt-2.d: Likewise.
* testsuite/ld-aarch64/pcrel_pic_defined.d: Likewise.
* testsuite/ld-aarch64/pcrel_pic_undefined.d: Likewise.
* testsuite/ld-aarch64/pie-bind-locally.d: Likewise.
* testsuite/ld-aarch64/plt_mapping_symbol.d: Likewise.
* testsuite/ld-aarch64/pr20402.d: Likewise.
* testsuite/ld-aarch64/pr22764.d: Likewise.
* testsuite/ld-aarch64/property-bti-pac1.d: Likewise.
* testsuite/ld-aarch64/protected-data.d: Likewise.
* testsuite/ld-aarch64/rela-abs-relative-be.d: Likewise.
* testsuite/ld-aarch64/rela-abs-relative-opt.d: Likewise.
* testsuite/ld-aarch64/rela-abs-relative.d: Likewise.
* testsuite/ld-aarch64/relasz.d: Likewise.
* testsuite/ld-aarch64/relocs-1027-symbolic-func.d: Likewise.
* testsuite/ld-aarch64/tls-desc-ie-ilp32.d: Likewise.
* testsuite/ld-aarch64/tls-desc-ie.d: Likewise.
* testsuite/ld-aarch64/tls-large-desc-be.d: Likewise.
* testsuite/ld-aarch64/tls-large-desc.d: Likewise.
* testsuite/ld-aarch64/tls-large-ie-be.d: Likewise.
* testsuite/ld-aarch64/tls-large-ie.d: Likewise.
* testsuite/ld-aarch64/tls-relax-gdesc-le-now.d: Likewise.
* testsuite/ld-aarch64/tls-small-ld.d: Likewise.
* testsuite/ld-aarch64/tls-tiny-desc.d: Likewise.
* testsuite/ld-aarch64/tls-tiny-gd.d: Likewise.
* testsuite/ld-aarch64/tls-tiny-ie.d: Likewise.
* testsuite/ld-aarch64/tls-tiny-ld.d: Likewise.
* testsuite/ld-aarch64/tlsle-symbol-offset.d: Likewise.
* testsuite/ld-aarch64/tlsle.d: Likewise.
* testsuite/ld-aarch64/variant_pcs-now.d: Likewise.
* testsuite/ld-aarch64/variant_pcs-shared.d: Likewise.
* testsuite/ld-arm/arm-elf.exp: Likewise. Remove --hash-style=sysv
from static tests. Consolidate armelftests_common_* vars into one.
* testsuite/ld-arm/gc-hidden-1.d: Require check_shared_lib_support.
* testsuite/ld-arm/movw-shared-1.d: Likewise.
* testsuite/ld-arm/movw-shared-2.d: Likewise.
* testsuite/ld-arm/movw-shared-3.d: Likewise.
* testsuite/ld-arm/movw-shared-4.d: Likewise.
* testsuite/ld-arm/pie-bind-locally.d: Likewise.
* testsuite/ld-arm/protected-data.d: Likewise.
* testsuite/ld-arm/rel32-reject-pie.d: Likewise.
* testsuite/ld-arm/rel32-reject.d: Likewise.
* testsuite/ld-arm/thumb2-bl-undefweak.d: Likewise.
* testsuite/ld-arm/thumb2-bl-undefweak1.d: Likewise.
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Emit *GLOB_DAT instead of *RELATIVE relocs for protected data
in shared objects.
This is needed for the fix of glibc bug 17711:
https://sourceware.org/bugzilla/show_bug.cgi?id=17711
bfd:
PR ld/18705
* elf32-arm.c (elf_backend_extern_protected_data): Define.
ld/testsuite:
PR ld/18705
* ld-arm/protected-data.d: New.
* ld-arm/protected-data.s: New.
* ld-arm/arm-elf.exp: Add new test.
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