Blame SOURCES/binutils-aarch64-properties.patch

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diff -rup binutils.orig/bfd/elfnn-aarch64.c binutils-2.30/bfd/elfnn-aarch64.c
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--- binutils.orig/bfd/elfnn-aarch64.c	2020-11-04 14:53:52.144476367 +0000
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+++ binutils-2.30/bfd/elfnn-aarch64.c	2020-11-04 14:56:42.275422499 +0000
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@@ -2191,6 +2191,9 @@ struct elf_aarch64_obj_tdata
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   /* Zero to warn when linking objects with incompatible wchar_t sizes.  */
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   int no_wchar_size_warning;
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+
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+  /* All GNU_PROPERTY_AARCH64_FEATURE_1_AND properties.  */
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+  uint32_t gnu_and_prop;
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 };
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 #define elf_aarch64_tdata(bfd)				\
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@@ -9311,6 +9314,32 @@ elfNN_aarch64_backend_symbol_processing
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     sym->flags |= BSF_KEEP;
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 }
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+/* Implement elf_backend_setup_gnu_properties for AArch64.  It serves as a
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+   wrapper function for _bfd_aarch64_elf_link_setup_gnu_properties to account
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+   for the effect of GNU properties of the output_bfd.  */
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+static bfd *
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+elfNN_aarch64_link_setup_gnu_properties (struct bfd_link_info *info)
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+{
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+  uint32_t prop = elf_aarch64_tdata (info->output_bfd)->gnu_and_prop;
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+  bfd *pbfd = _bfd_aarch64_elf_link_setup_gnu_properties (info, &prop);
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+  elf_aarch64_tdata (info->output_bfd)->gnu_and_prop = prop;
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+  return pbfd;
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+}
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+
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+/* Implement elf_backend_merge_gnu_properties for AArch64.  It serves as a
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+   wrapper function for _bfd_aarch64_elf_merge_gnu_properties to account
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+   for the effect of GNU properties of the output_bfd.  */
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+static bfd_boolean
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+elfNN_aarch64_merge_gnu_properties (struct bfd_link_info *info,
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+				       bfd *abfd,
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+				       elf_property *aprop,
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+				       elf_property *bprop)
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+{
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+  uint32_t prop
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+    = elf_aarch64_tdata (info->output_bfd)->gnu_and_prop;
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+  return  _bfd_aarch64_elf_merge_gnu_properties (info, abfd, aprop,
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+						 bprop, prop);
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+}
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 /* We use this so we can override certain functions
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    (though currently we don't).  */
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@@ -9453,6 +9482,12 @@ const struct elf_size_info elfNN_aarch64
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 #define elf_backend_symbol_processing		\
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   elfNN_aarch64_backend_symbol_processing
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+#define elf_backend_setup_gnu_properties	\
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+  elfNN_aarch64_link_setup_gnu_properties
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+
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+#define elf_backend_merge_gnu_properties	\
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+  elfNN_aarch64_merge_gnu_properties
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+
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 #define elf_backend_can_refcount       1
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 #define elf_backend_can_gc_sections    1
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 #define elf_backend_plt_readonly       1
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diff -rup binutils.orig/bfd/elfxx-aarch64.c binutils-2.30/bfd/elfxx-aarch64.c
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--- binutils.orig/bfd/elfxx-aarch64.c	2020-11-04 14:53:52.138476401 +0000
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+++ binutils-2.30/bfd/elfxx-aarch64.c	2020-11-04 14:56:42.276422492 +0000
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@@ -660,3 +660,183 @@ _bfd_aarch64_elf_write_core_note (bfd *a
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       }
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     }
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 }
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+
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+/* Find the first input bfd with GNU property and merge it with GPROP.  If no
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+   such input is found, add it to a new section at the last input.  Update
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+   GPROP accordingly.  */
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+bfd *
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+_bfd_aarch64_elf_link_setup_gnu_properties (struct bfd_link_info *info,
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+					    uint32_t *gprop)
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+{
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+  asection *sec;
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+  bfd *pbfd;
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+  bfd *ebfd = NULL;
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+  elf_property *prop;
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+
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+  uint32_t gnu_prop = *gprop;
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+
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+  /* Find a normal input file with GNU property note.  */
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+  for (pbfd = info->input_bfds;
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+       pbfd != NULL;
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+       pbfd = pbfd->link.next)
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+    if (bfd_get_flavour (pbfd) == bfd_target_elf_flavour
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+	&& bfd_count_sections (pbfd) != 0)
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+      {
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+	ebfd = pbfd;
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+
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+	if (elf_properties (pbfd) != NULL)
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+	  break;
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+      }
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+
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+  /* If ebfd != NULL it is either an input with property note or the last
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+     input.  Either way if we have gnu_prop, we should add it (by creating
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+     a section if needed).  */
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+  if (ebfd != NULL && gnu_prop)
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+    {
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+      prop = _bfd_elf_get_property (ebfd,
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+				    GNU_PROPERTY_AARCH64_FEATURE_1_AND,
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+				    4);
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+      prop->u.number |= gnu_prop;
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+      prop->pr_kind = property_number;
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+
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+      /* pbfd being NULL implies ebfd is the last input.  Create the GNU
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+	 property note section.  */
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+      if (pbfd == NULL)
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+	{
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+	  sec = bfd_make_section_with_flags (ebfd,
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+					     NOTE_GNU_PROPERTY_SECTION_NAME,
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+					     (SEC_ALLOC
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+					      | SEC_LOAD
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+					      | SEC_IN_MEMORY
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+					      | SEC_READONLY
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+					      | SEC_HAS_CONTENTS
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+					      | SEC_DATA));
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+	  if (sec == NULL)
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+	    info->callbacks->einfo (
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+	      _("%F%P: failed to create GNU property section\n"));
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+
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+	  elf_section_type (sec) = SHT_NOTE;
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+	}
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+    }
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+
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+  pbfd = _bfd_elf_link_setup_gnu_properties (info);
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+
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+  if (bfd_link_relocatable (info))
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+    return pbfd;
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+
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+  /* If pbfd has any GNU_PROPERTY_AARCH64_FEATURE_1_AND properties, update
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+     gnu_prop accordingly.  */
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+  if (pbfd != NULL)
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+    {
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+      elf_property_list *p;
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+
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+      /* The property list is sorted in order of type.  */
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+      for (p = elf_properties (pbfd); p; p = p->next)
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+	{
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+	  /* Check for all GNU_PROPERTY_AARCH64_FEATURE_1_AND.  */
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+	  if (GNU_PROPERTY_AARCH64_FEATURE_1_AND == p->property.pr_type)
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+	    {
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+	      gnu_prop = (p->property.u.number
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+			  & (GNU_PROPERTY_AARCH64_FEATURE_1_PAC
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+			      | GNU_PROPERTY_AARCH64_FEATURE_1_BTI));
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+	      break;
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+	    }
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+	  else if (GNU_PROPERTY_AARCH64_FEATURE_1_AND < p->property.pr_type)
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+	    break;
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+	}
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+    }
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+  *gprop = gnu_prop;
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+  return pbfd;
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+}
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+
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+/* Define elf_backend_parse_gnu_properties for AArch64.  */
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+enum elf_property_kind
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+_bfd_aarch64_elf_parse_gnu_properties (bfd *abfd, unsigned int type,
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+				       bfd_byte *ptr, unsigned int datasz)
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+{
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+  elf_property *prop;
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+
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+  switch (type)
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+    {
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+    case GNU_PROPERTY_AARCH64_FEATURE_1_AND:
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+      if (datasz != 4)
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+	{
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+	  _bfd_error_handler
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+	    ( _("error: %pB: <corrupt AArch64 used size: 0x%x>"),
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+	     abfd, datasz);
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+	  return property_corrupt;
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+	}
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+      prop = _bfd_elf_get_property (abfd, type, datasz);
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+      /* Combine properties of the same type.  */
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+      prop->u.number |= bfd_h_get_32 (abfd, ptr);
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+      prop->pr_kind = property_number;
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+      break;
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+
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+    default:
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+      return property_ignored;
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+    }
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+
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+  return property_number;
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+}
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+
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+/* Merge AArch64 GNU property BPROP with APROP also accounting for PROP.
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+   If APROP isn't NULL, merge it with BPROP and/or PROP.  Vice-versa if BROP
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+   isn't NULL.  Return TRUE if there is any update to APROP or if BPROP should
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+   be merge with ABFD.  */
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+bfd_boolean
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+_bfd_aarch64_elf_merge_gnu_properties (struct bfd_link_info *info
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+				       ATTRIBUTE_UNUSED,
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+				       bfd *abfd ATTRIBUTE_UNUSED,
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+				       elf_property *aprop,
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+				       elf_property *bprop,
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+				       uint32_t prop)
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+{
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+  unsigned int orig_number;
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+  bfd_boolean updated = FALSE;
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+  unsigned int pr_type = aprop != NULL ? aprop->pr_type : bprop->pr_type;
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+
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+  switch (pr_type)
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+    {
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+    case GNU_PROPERTY_AARCH64_FEATURE_1_AND:
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+      {
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+	if (aprop != NULL && bprop != NULL)
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+	  {
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+	    orig_number = aprop->u.number;
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+	    aprop->u.number = (orig_number & bprop->u.number) | prop;
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+	    updated = orig_number != aprop->u.number;
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+	    /* Remove the property if all feature bits are cleared.  */
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+	    if (aprop->u.number == 0)
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+	      aprop->pr_kind = property_remove;
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+	    break;
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+	  }
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+	/* If either is NULL, the AND would be 0 so, if there is
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+	   any PROP, asign it to the input that is not NULL.  */
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+	if (prop)
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+	  {
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+	    if (aprop != NULL)
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+	      {
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+		orig_number = aprop->u.number;
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+		aprop->u.number = prop;
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+		updated = orig_number != aprop->u.number;
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+	      }
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+	    else
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+	      {
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+		bprop->u.number = prop;
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+		updated = TRUE;
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+	      }
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+	  }
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+	/* No PROP and BPROP is NULL, so remove APROP.  */
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+	else if (aprop != NULL)
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+	  {
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+	    aprop->pr_kind = property_remove;
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+	    updated = TRUE;
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+	  }
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+      }
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+      break;
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+
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+    default:
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+      abort ();
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+    }
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+
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+  return updated;
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+}
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diff -rup binutils.orig/bfd/elfxx-aarch64.h binutils-2.30/bfd/elfxx-aarch64.h
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--- binutils.orig/bfd/elfxx-aarch64.h	2020-11-04 14:53:52.134476424 +0000
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+++ binutils-2.30/bfd/elfxx-aarch64.h	2020-11-04 14:56:42.276422492 +0000
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@@ -65,3 +65,19 @@ _bfd_aarch64_elf_write_core_note (bfd *,
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 #define elf_backend_grok_prstatus	_bfd_aarch64_elf_grok_prstatus
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 #define elf_backend_grok_psinfo		_bfd_aarch64_elf_grok_psinfo
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 #define elf_backend_write_core_note	_bfd_aarch64_elf_write_core_note
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+
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+extern bfd *
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+_bfd_aarch64_elf_link_setup_gnu_properties (struct bfd_link_info *,
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+					    uint32_t *);
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+
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+extern enum elf_property_kind
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+_bfd_aarch64_elf_parse_gnu_properties (bfd *, unsigned int,
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+				       bfd_byte *, unsigned int);
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+
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+extern bfd_boolean
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+_bfd_aarch64_elf_merge_gnu_properties (struct bfd_link_info *, bfd *,
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+				       elf_property *, elf_property *,
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+				       uint32_t);
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+
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+#define elf_backend_parse_gnu_properties	\
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+  _bfd_aarch64_elf_parse_gnu_properties
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diff -rup binutils.orig/binutils/readelf.c binutils-2.30/binutils/readelf.c
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--- binutils.orig/binutils/readelf.c	2020-11-04 14:53:51.723478764 +0000
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+++ binutils-2.30/binutils/readelf.c	2020-11-04 14:56:42.277422485 +0000
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@@ -17103,6 +17103,33 @@ decode_x86_feature_2 (unsigned int bitma
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 }
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 static void
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+decode_aarch64_feature_1_and (unsigned int bitmask)
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+{
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+  while (bitmask)
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+    {
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+      unsigned int bit = bitmask & (- bitmask);
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+
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+      bitmask &= ~ bit;
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+      switch (bit)
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+	{
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+	case GNU_PROPERTY_AARCH64_FEATURE_1_BTI:
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+	  printf ("BTI");
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+	  break;
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+
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+	case GNU_PROPERTY_AARCH64_FEATURE_1_PAC:
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+	  printf ("PAC");
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+	  break;
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+
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+	default:
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+	  printf (_("<unknown: %x>"), bit);
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+	  break;
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+	}
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+      if (bitmask)
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+	printf (", ");
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+    }
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+}
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+
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+static void
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 print_gnu_property_note (Filedata * filedata, Elf_Internal_Note * pnote)
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 {
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   unsigned char * ptr = (unsigned char *) pnote->descdata;
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@@ -17236,6 +17263,18 @@ print_gnu_property_note (Filedata * file
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 		  break;
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 		}
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 	    }
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+	  else if (filedata->file_header.e_machine == EM_AARCH64)
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+	    {
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+	      if (type == GNU_PROPERTY_AARCH64_FEATURE_1_AND)
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+		{
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+		  printf ("AArch64 feature: ");
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+		  if (datasz != 4)
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+		    printf (_("<corrupt length: %#x> "), datasz);
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+		  else
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+		    decode_aarch64_feature_1_and (byte_get (ptr, 4));
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+		  goto next;
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+		}
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+	    }
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 	}
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       else
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 	{
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diff -rup binutils.orig/include/elf/common.h binutils-2.30/include/elf/common.h
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--- binutils.orig/include/elf/common.h	2020-11-04 14:53:52.155476304 +0000
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+++ binutils-2.30/include/elf/common.h	2020-11-04 14:56:42.277422485 +0000
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@@ -832,6 +832,12 @@
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 #define GNU_PROPERTY_X86_FEATURE_2_XSAVEOPT	(1U << 8)
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 #define GNU_PROPERTY_X86_FEATURE_2_XSAVEC	(1U << 9)
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+/* AArch64 specific GNU PROPERTY.  */
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+#define GNU_PROPERTY_AARCH64_FEATURE_1_AND	0xc0000000
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+
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+#define GNU_PROPERTY_AARCH64_FEATURE_1_BTI	(1U << 0)
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+#define GNU_PROPERTY_AARCH64_FEATURE_1_PAC	(1U << 1)
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+
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 /* Values used in GNU .note.ABI-tag notes (NT_GNU_ABI_TAG).  */
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 #define GNU_ABI_TAG_LINUX	0
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 #define GNU_ABI_TAG_HURD	1
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diff -rup binutils.orig/ld/testsuite/ld-aarch64/aarch64-elf.exp binutils-2.30/ld/testsuite/ld-aarch64/aarch64-elf.exp
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--- binutils.orig/ld/testsuite/ld-aarch64/aarch64-elf.exp	2020-11-04 14:53:51.843478081 +0000
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+++ binutils-2.30/ld/testsuite/ld-aarch64/aarch64-elf.exp	2020-11-04 14:56:42.278422479 +0000
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@@ -337,6 +337,10 @@ run_dump_test_lp64 "variant_pcs-r"
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 run_dump_test_lp64 "variant_pcs-shared"
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 run_dump_test_lp64 "variant_pcs-now"
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+run_dump_test "property-bti-pac1"
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+run_dump_test "property-bti-pac2"
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+run_dump_test "property-bti-pac3"
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+
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 set aarch64elflinktests {
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   {"ld-aarch64/so with global symbol" "-shared" "" "" {copy-reloc-so.s}
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     {} "copy-reloc-so.so"}
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--- /dev/null	2020-11-04 08:04:13.849482156 +0000
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+++ binutils-2.30/ld/testsuite/ld-aarch64/property-bti-pac1.d	2020-11-04 14:56:42.278422479 +0000
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@@ -0,0 +1,11 @@
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+#name: GNU Property (single input, combine section)
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+#source: property-bti-pac1.s
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+#as: -march=armv8.5-a -defsym __mult__=0
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+#ld: -shared
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+#readelf: -n
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+#target: *linux*
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+
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+Displaying notes found in: .note.gnu.property
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+  Owner                 Data size	Description
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+  GNU                  0x00000010	NT_GNU_PROPERTY_TYPE_0
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+      Properties: AArch64 feature: BTI, PAC
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--- /dev/null	2020-11-04 08:04:13.849482156 +0000
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+++ binutils-2.30/ld/testsuite/ld-aarch64/property-bti-pac1.s	2020-11-04 14:56:42.278422479 +0000
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@@ -0,0 +1,37 @@
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+	.text
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+	.globl _start
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+	.type _start,@function
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+_start:
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+	mov x1, #2
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+.ifndef __mult__
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+	bl foo
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+.endif
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+	.section ".note.gnu.property", "a"
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+	.p2align 3
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+	.long 1f - 0f		/* name length */
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+	.long 5f - 2f		/* data length */
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+	.long 5			/* note type */
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+0:	.asciz "GNU"		/* vendor name */
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+1:
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+	.p2align 3
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+2:	.long 0xc0000000	/* pr_type.  */
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+	.long 4f - 3f		/* pr_datasz.  */
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+3:
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+	.long 0x2		/* PAC.  */
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+4:
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+	.p2align 3
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+5:
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+	.p2align 3
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+	.long 1f - 0f		/* name length */
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+	.long 5f - 2f		/* data length */
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+	.long 5			/* note type */
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+0:	.asciz "GNU"		/* vendor name */
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+1:
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+	.p2align 3
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+2:	.long 0xc0000000	/* pr_type.  */
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+	.long 4f - 3f		/* pr_datasz.  */
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+3:
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+	.long 0x1		/* BTI.  */
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+4:
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+	.p2align 3
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+5:
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--- /dev/null	2020-11-04 08:04:13.849482156 +0000
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+++ binutils-2.30/ld/testsuite/ld-aarch64/property-bti-pac2.s	2020-11-04 14:56:42.278422479 +0000
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@@ -0,0 +1,50 @@
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+	.text
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+	.global	foo
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+	.type	foo, %function
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+foo:
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+	sub	sp, sp, #16
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+	mov	w0, 9
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+	str	w0, [sp, 12]
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+	ldr	w0, [sp, 12]
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+	add	w0, w0, 4
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+	str	w0, [sp, 12]
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+	nop
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+	add	sp, sp, 16
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+	ret
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+	.size	foo, .-foo
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+	.global	bar
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+	.type	bar, %function
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+.ifdef __property_bti__
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+	.section ".note.gnu.property", "a"
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+	.p2align 3
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+	.long 1f - 0f		/* name length */
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+	.long 5f - 2f		/* data length */
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+	.long 5			/* note type */
5affbb
+0:	.asciz "GNU"		/* vendor name */
5affbb
+1:
5affbb
+	.p2align 3
5affbb
+2:	.long 0xc0000000	/* pr_type.  */
5affbb
+	.long 4f - 3f		/* pr_datasz.  */
5affbb
+3:
5affbb
+	.long 0x1		/* BTI.  */
5affbb
+4:
5affbb
+	.p2align 3
5affbb
+5:
5affbb
+.endif
5affbb
+.ifdef __property_pac__
5affbb
+	.section ".note.gnu.property", "a"
5affbb
+	.p2align 3
5affbb
+	.long 1f - 0f		/* name length */
5affbb
+	.long 5f - 2f		/* data length */
5affbb
+	.long 5			/* note type */
5affbb
+0:	.asciz "GNU"		/* vendor name */
5affbb
+1:
5affbb
+	.p2align 3
5affbb
+2:	.long 0xc0000000	/* pr_type.  */
5affbb
+	.long 4f - 3f		/* pr_datasz.  */
5affbb
+3:
5affbb
+	.long 0x2		/* PAC.  */
5affbb
+4:
5affbb
+	.p2align 3
5affbb
+5:
5affbb
+.endif
5affbb
--- /dev/null	2020-11-04 08:04:13.849482156 +0000
5affbb
+++ binutils-2.30/ld/testsuite/ld-aarch64/property-bti-pac2.d	2020-11-04 14:56:42.278422479 +0000
5affbb
@@ -0,0 +1,12 @@
5affbb
+#name: GNU Property (combine multiple with BTI)
5affbb
+#source: property-bti-pac1.s
5affbb
+#source: property-bti-pac2.s
5affbb
+#as: -mabi=lp64 -defsym __property_bti__=1
5affbb
+#ld: -e _start
5affbb
+#readelf: -n
5affbb
+#target: *linux*
5affbb
+
5affbb
+Displaying notes found in: .note.gnu.property
5affbb
+  Owner                 Data size	Description
5affbb
+  GNU                  0x00000010	NT_GNU_PROPERTY_TYPE_0
5affbb
+      Properties: AArch64 feature: BTI
5affbb
--- /dev/null	2020-11-04 08:04:13.849482156 +0000
5affbb
+++ binutils-2.30/ld/testsuite/ld-aarch64/property-bti-pac3.d	2020-11-04 14:56:42.278422479 +0000
5affbb
@@ -0,0 +1,12 @@
5affbb
+#name: GNU Property (combine multiple with PAC)
5affbb
+#source: property-bti-pac1.s
5affbb
+#source: property-bti-pac2.s
5affbb
+#as: -mabi=lp64 -defsym __property_pac__=1
5affbb
+#ld: -e _start
5affbb
+#readelf: -n
5affbb
+#target: *linux*
5affbb
+
5affbb
+Displaying notes found in: .note.gnu.property
5affbb
+  Owner                 Data size	Description
5affbb
+  GNU                  0x00000010	NT_GNU_PROPERTY_TYPE_0
5affbb
+      Properties: AArch64 feature: PAC
5affbb
diff -rup binutils.orig/bfd/elfnn-aarch64.c binutils-2.30/bfd/elfnn-aarch64.c
5affbb
--- binutils.orig/bfd/elfnn-aarch64.c	2020-11-25 11:53:26.648275978 +0000
5affbb
+++ binutils-2.30/bfd/elfnn-aarch64.c	2020-11-25 12:21:39.276864970 +0000
5affbb
@@ -9331,12 +9331,14 @@ elfNN_aarch64_link_setup_gnu_properties
5affbb
    for the effect of GNU properties of the output_bfd.  */
5affbb
 static bfd_boolean
5affbb
 elfNN_aarch64_merge_gnu_properties (struct bfd_link_info *info,
5affbb
-				       bfd *abfd,
5affbb
-				       elf_property *aprop,
5affbb
-				       elf_property *bprop)
5affbb
+				    bfd *abfd,
5affbb
+				    bfd *bbfd ATTRIBUTE_UNUSED,
5affbb
+				    elf_property *aprop,
5affbb
+				    elf_property *bprop)
5affbb
 {
5affbb
   uint32_t prop
5affbb
     = elf_aarch64_tdata (info->output_bfd)->gnu_and_prop;
5affbb
+
5affbb
   return  _bfd_aarch64_elf_merge_gnu_properties (info, abfd, aprop,
5affbb
 						 bprop, prop);
5affbb
 }
5affbb
diff -rup binutils.orig/bfd/elfxx-aarch64.c binutils-2.30/bfd/elfxx-aarch64.c
5affbb
--- binutils.orig/bfd/elfxx-aarch64.c	2020-11-25 11:53:26.655275930 +0000
5affbb
+++ binutils-2.30/bfd/elfxx-aarch64.c	2020-11-25 12:21:34.689895875 +0000
5affbb
@@ -22,6 +22,7 @@
5affbb
 #include "elfxx-aarch64.h"
5affbb
 #include <stdarg.h>
5affbb
 #include <string.h>
5affbb
+#include "libbfd.h"
5affbb
 
5affbb
 #define MASK(n) ((1u << (n)) - 1)
5affbb
 
5affbb
@@ -835,7 +836,10 @@ _bfd_aarch64_elf_merge_gnu_properties (s
5affbb
       break;
5affbb
 
5affbb
     default:
5affbb
-      abort ();
5affbb
+      _bfd_error_handler
5affbb
+	( _("error: %pB: <corrupt AArch64 property note: 0x%x>"),
5affbb
+	  abfd, pr_type);
5affbb
+      return FALSE;
5affbb
     }
5affbb
 
5affbb
   return updated;
5affbb
diff -rup binutils.orig/ld/testsuite/ld-aarch64/property-bti-pac1.d binutils-2.30/ld/testsuite/ld-aarch64/property-bti-pac1.d
5affbb
--- binutils.orig/ld/testsuite/ld-aarch64/property-bti-pac1.d	2020-11-25 11:53:26.344278044 +0000
5affbb
+++ binutils-2.30/ld/testsuite/ld-aarch64/property-bti-pac1.d	2020-11-25 11:57:53.179471900 +0000
5affbb
@@ -1,6 +1,6 @@
5affbb
 #name: GNU Property (single input, combine section)
5affbb
 #source: property-bti-pac1.s
5affbb
-#as: -march=armv8.5-a -defsym __mult__=0
5affbb
+#as: -defsym __mult__=0
5affbb
 #ld: -shared
5affbb
 #readelf: -n
5affbb
 #target: *linux*