[BFD, LD, AArch64, 1/3] Add support for GNU PROPERTIES in AArch64 for BTI and PAC

[deliverable/binutils-gdb.git] / bfd / elfnn-aarch64.c

diff --git a/bfd/elfnn-aarch64.c b/bfd/elfnn-aarch64.c
index faa27611d466ce75e5c02d8bbcfca6459618d4bd..5b8cc4c9701feacd0deb5c998c89d17d97864646 100644 (file)
--- a/bfd/elfnn-aarch64.c
+++ b/bfd/elfnn-aarch64.c
@@ -2435,6 +2435,9 @@ struct elf_aarch64_obj_tdata
 
   /* Zero to warn when linking objects with incompatible wchar_t sizes.  */
   int no_wchar_size_warning;
+
+  /* All GNU_PROPERTY_AARCH64_FEATURE_1_AND properties.  */
+  uint32_t gnu_and_prop;
 };
 
 #define elf_aarch64_tdata(bfd)                         \
@@ -9615,6 +9618,32 @@ elfNN_aarch64_backend_symbol_processing (bfd *abfd, asymbol *sym)
     sym->flags |= BSF_KEEP;
 }
 
+/* Implement elf_backend_setup_gnu_properties for AArch64.  It serves as a
+   wrapper function for _bfd_aarch64_elf_link_setup_gnu_properties to account
+   for the effect of GNU properties of the output_bfd.  */
+static bfd *
+elfNN_aarch64_link_setup_gnu_properties (struct bfd_link_info *info)
+{
+  uint32_t prop = elf_aarch64_tdata (info->output_bfd)->gnu_and_prop;
+  bfd *pbfd = _bfd_aarch64_elf_link_setup_gnu_properties (info, &prop);
+  elf_aarch64_tdata (info->output_bfd)->gnu_and_prop = prop;
+  return pbfd;
+}
+
+/* Implement elf_backend_merge_gnu_properties for AArch64.  It serves as a
+   wrapper function for _bfd_aarch64_elf_merge_gnu_properties to account
+   for the effect of GNU properties of the output_bfd.  */
+static bfd_boolean
+elfNN_aarch64_merge_gnu_properties (struct bfd_link_info *info,
+                                      bfd *abfd,
+                                      elf_property *aprop,
+                                      elf_property *bprop)
+{
+  uint32_t prop
+    = elf_aarch64_tdata (info->output_bfd)->gnu_and_prop;
+  return  _bfd_aarch64_elf_merge_gnu_properties (info, abfd, aprop,
+                                                bprop, prop);
+}
 
 /* We use this so we can override certain functions
    (though currently we don't).  */
@@ -9754,6 +9783,12 @@ const struct elf_size_info elfNN_aarch64_size_info =
 #define elf_backend_symbol_processing          \
   elfNN_aarch64_backend_symbol_processing
 
+#define elf_backend_setup_gnu_properties       \
+  elfNN_aarch64_link_setup_gnu_properties
+
+#define elf_backend_merge_gnu_properties       \
+  elfNN_aarch64_merge_gnu_properties
+
 #define elf_backend_can_refcount       1
 #define elf_backend_can_gc_sections    1
 #define elf_backend_plt_readonly       1