readonly_dynrelocs

In early October, HJ Lu added support for a number of targets to "Dump
dynamic relocation in read-only section with minfo".  This extends
that support to more targets, displays the symbol involved, and splits
the existing function that sets TEXTREL into a "readonly_dynrelocs"
and "maybe_set_textrel" function.  I'll need "readonly_dynrelocs" if I
ever get around to fixing "pr22374 function pointer initialization"
fails.

am33_2.0, arc, bfin, hppa64, mn10300, and nios2 fail to mark a binary
needing text relocations with DT_TEXTREL.  That's not good.  xtensa also
fails to do so but complains about "dangerous relocation: dynamic
relocation in read-only section" so I reckon that is fine and have
marked the test as an xfail.  The other targets need maintainer
attention.

Curiously, the map file dump wasn't added for x86, so the map test
currently fail on x86.  It also fails on alpha, am33_2.0, arc, bfin,
hppa64, ia64, m68k, mips, mn10300, nios2, score and vax.  cris
complains with "tmpdir/textrel.o, section .rodata: relocation
R_CRIS_32 should not be used in a shared object; recompile with -fPIC"
so I've marked it as an xfail.

bfd/
	* elf32-hppa.c (maybe_set_textrel): Print symbol for map file output.
	* elf32-ppc.c (maybe_set_textrel): Likewise.
	* elf64-ppc.c (maybe_set_textrel): Likewise.
	* elf32-arm.c (readonly_dynrelocs): New function.
	(maybe_set_textrel): New function, replacing..
	(elf32_arm_readonly_dynrelocs): ..this.
	* elf32-lm32.c (readonly_dynrelocs): New function.
	(maybe_set_textrel): New function, replacing old version of..
	(readonly_dynrelocs): ..this.
	* elf32-m32r.c (readonly_dynrelocs): New function.
	(maybe_set_textrel): New function, replacing old version of..
	(readonly_dynrelocs): ..this.
	* elf32-metag.c (readonly_dynrelocs): New function.
	(maybe_set_textrel): New function, replacing old version of..
	(readonly_dynrelocs): ..this.
	* elf32-nds32.c: Delete unnecessary forward declarations.
	(readonly_dynrelocs): New function.
	(maybe_set_textrel): New function, replacing old version of..
	(readonly_dynrelocs): ..this.
	* elf32-or1k.c (readonly_dynrelocs): New function.
	(maybe_set_textrel): New function, replacing old version of..
	(readonly_dynrelocs): ..this.
	* elf32-s390.c (readonly_dynrelocs): New function.
	(maybe_set_textrel): New function, replacing old version of..
	(readonly_dynrelocs): ..this.
	* elf32-sh.c (readonly_dynrelocs): New function.
	(maybe_set_textrel): New function, replacing old version of..
	(readonly_dynrelocs): ..this.
	* elf32-tic6x.c (readonly_dynrelocs): New function.
	(maybe_set_textrel): New function, replacing..
	(elf32_tic6x_readonly_dynrelocs): ..this.
	* elf32-tilepro.c (readonly_dynrelocs): New function.
	(maybe_set_textrel): New function, replacing old version of..
	(readonly_dynrelocs): ..this.
	* elf64-s390.c (readonly_dynrelocs): New function.
	(maybe_set_textrel): New function, replacing old version of..
	(readonly_dynrelocs): ..this.
	* elfnn-aarch64.c (readonly_dynrelocs): New function.
	(maybe_set_textrel): New function, replacing..
	(aarch64_readonly_readonly_dynrelocs): ..this.
	* elfnn-riscv.c (readonly_dynrelocs): New function.
	(maybe_set_textrel): New function, replacing old version of..
	(readonly_dynrelocs): ..this.
	* elfxx-sparc.c (readonly_dynrelocs): New function.
	(maybe_set_textrel): New function, replacing old version of..
	(readonly_dynrelocs): ..this.
	* elfxx-tilegx.c (readonly_dynrelocs): New function.
	(maybe_set_textrel): New function, replacing old version of..
	(readonly_dynrelocs): ..this.
ld/
	* testsuite/ld-elf/shared.exp: Run new textrel tests.
	* testsuite/ld-elf/textrel.map: New file.
	* testsuite/ld-elf/textrel.rd: New file.
	* testsuite/ld-elf/textrel.s: New file.
	* testsuite/ld-elf/textrel.warn: New file.

1 files changed, 32 insertions, 73 deletions

diff --git a/bfd/elf32-nds32.c b/bfd/elf32-nds32.c
index 32870eea3b3..65e430cee1e 100644
--- a/bfd/elf32-nds32.c
+++ b/bfd/elf32-nds32.c
@@ -56,56 +56,8 @@ static bfd_reloc_status_type nds32_elf_sda15_reloc
 static bfd_reloc_status_type nds32_elf_do_9_pcrel_reloc
   (bfd *, reloc_howto_type *, asection *, bfd_byte *, bfd_vma,
    asection *, bfd_vma, bfd_vma);
-static void nds32_elf_relocate_hi20
-  (bfd *, int, Elf_Internal_Rela *, Elf_Internal_Rela *, bfd_byte *, bfd_vma);
-static reloc_howto_type *bfd_elf32_bfd_reloc_type_table_lookup
-  (enum elf_nds32_reloc_type);
-static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
-  (bfd *, bfd_reloc_code_real_type);
-
-/* Target hooks.  */
-static void nds32_info_to_howto_rel
-  (bfd *, arelent *, Elf_Internal_Rela *dst);
-static void nds32_info_to_howto
-  (bfd *, arelent *, Elf_Internal_Rela *dst);
-static bfd_boolean nds32_elf_add_symbol_hook
-  (bfd *, struct bfd_link_info *, Elf_Internal_Sym *, const char **,
-   flagword *, asection **, bfd_vma *);
-static bfd_boolean nds32_elf_relocate_section
-  (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
-   Elf_Internal_Rela *, Elf_Internal_Sym *, asection **);
-static bfd_boolean nds32_elf_object_p (bfd *);
-static void nds32_elf_final_write_processing (bfd *, bfd_boolean);
-static bfd_boolean nds32_elf_set_private_flags (bfd *, flagword);
-static bfd_boolean nds32_elf_merge_private_bfd_data
-  (bfd *, struct bfd_link_info *);
-static bfd_boolean nds32_elf_print_private_bfd_data (bfd *, void *);
-static bfd_boolean nds32_elf_check_relocs
-  (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *);
-static asection *nds32_elf_gc_mark_hook
-  (asection *, struct bfd_link_info *, Elf_Internal_Rela *,
-   struct elf_link_hash_entry *, Elf_Internal_Sym *);
-static bfd_boolean nds32_elf_adjust_dynamic_symbol
-  (struct bfd_link_info *, struct elf_link_hash_entry *);
-static bfd_boolean nds32_elf_size_dynamic_sections
-  (bfd *, struct bfd_link_info *);
-static bfd_boolean nds32_elf_create_dynamic_sections
-  (bfd *, struct bfd_link_info *);
-static bfd_boolean nds32_elf_finish_dynamic_sections
-  (bfd *, struct bfd_link_info *info);
-static bfd_boolean nds32_elf_finish_dynamic_symbol
-  (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
-   Elf_Internal_Sym *);
-static bfd_boolean nds32_elf_mkobject (bfd *);
 
 /* Nds32 helper functions.  */
-static bfd_reloc_status_type nds32_elf_final_sda_base
-  (bfd *, struct bfd_link_info *, bfd_vma *, bfd_boolean);
-static bfd_boolean allocate_dynrelocs (struct elf_link_hash_entry *, void *);
-static bfd_boolean readonly_dynrelocs (struct elf_link_hash_entry *, void *);
-static Elf_Internal_Rela *find_relocs_at_address
-  (Elf_Internal_Rela *, Elf_Internal_Rela *,
-   Elf_Internal_Rela *, enum elf_nds32_reloc_type);
 static bfd_vma calculate_memory_address
 (bfd *, Elf_Internal_Rela *, Elf_Internal_Sym *, Elf_Internal_Shdr *);
 static int nds32_get_section_contents (bfd *, asection *,
@@ -134,13 +86,6 @@ static bfd_boolean  nds32_relax_fp_as_gp
 static bfd_boolean nds32_fag_remove_unused_fpbase
   (bfd *abfd, asection *sec, Elf_Internal_Rela *internal_relocs,
    Elf_Internal_Rela *irelend);
-static bfd_byte *
-nds32_elf_get_relocated_section_contents (bfd *abfd,
-					  struct bfd_link_info *link_info,
-					  struct bfd_link_order *link_order,
-					  bfd_byte *data,
-					  bfd_boolean relocatable,
-					  asymbol **symbols);
 
 enum
 {
@@ -3561,6 +3506,22 @@ nds32_elf_copy_indirect_symbol (struct bfd_link_info *info,
   _bfd_elf_link_hash_copy_indirect (info, dir, ind);
 }
 
+/* Find dynamic relocs for H that apply to read-only sections.  */
+
+static asection *
+readonly_dynrelocs (struct elf_link_hash_entry *h)
+{
+  struct elf_nds32_dyn_relocs *p;
+
+  for (p = elf32_nds32_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
+    {
+      asection *s = p->sec->output_section;
+
+      if (s != NULL && (s->flags & SEC_READONLY) != 0)
+	return p->sec;
+    }
+  return NULL;
+}
 
 /* Adjust a symbol defined by a dynamic object and referenced by a
    regular object.  The current definition is in some section of the
@@ -3893,31 +3854,29 @@ allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
   return TRUE;
 }
 
-/* Find any dynamic relocs that apply to read-only sections.  */
+/* Set DF_TEXTREL if we find any dynamic relocs that apply to
+   read-only sections.  */
 
 static bfd_boolean
-readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
+maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
 {
-  struct elf_nds32_link_hash_entry *eh;
-  struct elf_nds32_dyn_relocs *p;
+  asection *sec;
 
-  if (h->root.type == bfd_link_hash_warning)
-    h = (struct elf_link_hash_entry *) h->root.u.i.link;
+  if (h->root.type == bfd_link_hash_indirect)
+    return TRUE;
 
-  eh = (struct elf_nds32_link_hash_entry *) h;
-  for (p = eh->dyn_relocs; p != NULL; p = p->next)
+  sec = readonly_dynrelocs (h);
+  if (sec != NULL)
     {
-      asection *s = p->sec->output_section;
-
-      if (s != NULL && (s->flags & SEC_READONLY) != 0)
-	{
-	  struct bfd_link_info *info = (struct bfd_link_info *) inf;
+      struct bfd_link_info *info = (struct bfd_link_info *) info_p;
 
-	  info->flags |= DF_TEXTREL;
+      info->flags |= DF_TEXTREL;
+      info->callbacks->minfo
+	(_("%B: dynamic relocation against `%T' in read-only section `%A'\n"),
+	 sec->owner, h->root.root.string, sec);
 
-	  /* Not an error, just cut short the traversal.  */
-	  return FALSE;
-	}
+      /* Not an error, just cut short the traversal.  */
+      return FALSE;
     }
   return TRUE;
 }
@@ -4113,7 +4072,7 @@ nds32_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
 	  /* If any dynamic relocs apply to a read-only section,
 	     then we need a DT_TEXTREL entry.  */
 	  if ((info->flags & DF_TEXTREL) == 0)
-	    elf_link_hash_traverse (&htab->root, readonly_dynrelocs,
+	    elf_link_hash_traverse (&htab->root, maybe_set_textrel,
 				    (void *) info);
 
 	  if ((info->flags & DF_TEXTREL) != 0)