arm: Define elf_backend_extern_protected_data to 0 [PR 18705]

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.

diff --git a/bfd/elf32-arm.c b/bfd/elf32-arm.c
index 60f89ec61179a3ccf398cec83ae426ce28ebdbe2..0852b38ae4cf12eb4c573ed3a782918043817a38 100644 (file)
--- a/bfd/elf32-arm.c
+++ b/bfd/elf32-arm.c
@@ -20315,7 +20315,7 @@ elf32_arm_backend_symbol_processing (bfd *abfd, asymbol *sym)
 #define elf_backend_dtrel_excludes_plt 1
 
 #define elf_backend_got_header_size    12
-#define elf_backend_extern_protected_data 1
+#define elf_backend_extern_protected_data 0
 
 #undef elf_backend_obj_attrs_vendor
 #define elf_backend_obj_attrs_vendor           "aeabi"

diff --git a/ld/testsuite/ld-arm/protected-data.d b/ld/testsuite/ld-arm/protected-data.d
index 3f266dea1b4124846b6cb9ecd8fe600f0eddd7b4..7dffe9ab95887c019d0120453154bd9948181621 100644 (file)
--- a/ld/testsuite/ld-arm/protected-data.d
+++ b/ld/testsuite/ld-arm/protected-data.d
@@ -2,4 +2,4 @@
 #ld: -shared
 #readelf: -r -W
 #...
-.* R_ARM_GLOB_DAT .* var.*
+.* R_ARM_RELATIVE .*