dyn_relocs tidy

Many targets define their own dyn_relocs struct when they could use
struct elf_dyn_relocs.  This patch tidies that, and uses
readonly_dynrelocs in a few more places.

The SH adjust_dynamic_symbol had some really weird code dating back to
2002 that looked over dynamic relocations for any in SEC_HAS_CONTENTS
or SEC_READONLY sections, rather than just the usual SEC_READONLY
sections.  So basically any dynamic relocation.  What's more, the SH
relocate_section has no support for emitting dynamic relocations in
non-PIC.  In other words, SH has no support for avoiding copy relocs
in non-PIC.  I've made that more obvious by using "if (0 && ..)" in
asjust_dynamic_symbol.

Unfortunately, LM32, M32R, NDS32, and OR1K copied the bogus SH
adjust_dynamic_symbol code.  So none of those targets would have
avoided copy relocs.  LM32, M32R, NDS32 get the "if (0)" treatment
too.  (LM32 is even more broken in that non_got_ref is never set.)

OR1K relocate_section looks like it might support dynamic relocs in
non-PIC, so I've enabled the copy reloc avoidance code for that
target.

	* elf32-hppa.c (struct elf32_hppa_dyn_reloc_entry): Delete.  Use
	struct elf_dyn_relocs throughout file instead.
	(elf32_hppa_adjust_dynamic_symbol): Comment tidy.
	* elf32-lm32.c (struct elf_lm32_dyn_relocs): Delete.  Use
	struct elf_dyn_relocs throughout file instead.
	(lm32_elf_adjust_dynamic_symbol): Use readonly_dynrelocs, but disable.
	Disable -z no-copyreloc too.
	* elf32-m32r.c (struct elf_m32r_dyn_relocs): Delete.  Use
	struct elf_dyn_relocs throughout file instead.
	(m32r_elf_adjust_dynamic_symbol): Use readonly_dynrelocs, but disable.
	Disable -z no-copyreloc too.
	* elf32-metag.c (struct elf_metag_dyn_reloc_entry): Delete.  Use
	struct elf_dyn_relocs throughout file instead.
	(elf_metag_adjust_dynamic_symbol): Use readonly_dynrelocs.
	* elf32-microblaze.c (struct elf32_mb_dyn_relocs): Delete.  Use
	struct elf_dyn_relocs throughout file instead.
	(readonly_dynrelocs): New function.
	(microblaze_elf_adjust_dynamic_symbol): Use it.
	* elf32-nds32.c (struct elf_nds32_dyn_relocs): Delete.  Use
	struct elf_dyn_relocs throughout file instead.
	(nds32_elf_adjust_dynamic_symbol): Use readonly_dynrelocs, but disable.
	Disable -z no-copyreloc too.
	* elf32-nios2.c (struct elf32_nios2_dyn_relocs): Delete.  Use
	struct elf_dyn_relocs throughout file instead.
	* elf32-or1k.c (struct elf_or1k_dyn_relocs): Delete.  Use
	struct elf_dyn_relocs throughout file instead.
	(or1k_elf_adjust_dynamic_symbol): Use readonly_dynrelocs.
	* elf32-sh.c (struct elf_sh_dyn_relocs): Delete.  Use
	struct elf_dyn_relocs throughout file instead.
	(sh_elf_adjust_dynamic_symbol): Use readonly_dynrelocs, but disable.
	Disable -z no-copyreloc too.
	* elf32-tilepro.c (struct tilepro_elf_dyn_relocs): Delete.  Use
	struct elf_dyn_relocs throughout file instead.
	(tilepro_elf_adjust_dynamic_symbol): Use readonly_dynrelocs.
	* elfnn-riscv.c (struct riscv_elf_dyn_relocs): Delete.  Use
	struct elf_dyn_relocs throughout file instead.
	(riscv_elf_adjust_dynamic_symbol): Use readonly_dynrelocs.
	* elfxx-sparc.c (struct _bfd_sparc_elf_dyn_relocs): Delete.  Use
	struct elf_dyn_relocs throughout file instead.
	(_bfd_sparc_elf_adjust_dynamic_symbol): Use readonly_dynrelocs.
	* elfxx-tilegx.c (struct tilegx_elf_dyn_relocs): Delete.  Use
	struct elf_dyn_relocs throughout file instead.
	(tilegx_elf_adjust_dynamic_symbol): Use readonly_dynrelocs.
	* elf32-s390.c (elf_s390_adjust_dynamic_symbol): Use readonly_dynrelocs.
	* elf64-s390.c (elf_s390_adjust_dynamic_symbol): Use readonly_dynrelocs.

1 files changed, 16 insertions, 48 deletions

diff --git a/bfd/elf32-m32r.c b/bfd/elf32-m32r.c
index 94bd482..39c7f75 100644
--- a/bfd/elf32-m32r.c
+++ b/bfd/elf32-m32r.c
@@ -1485,27 +1485,6 @@ struct elf_m32r_pcrel_relocs_copied
   bfd_size_type count;
 };
 
-/* The sh linker needs to keep track of the number of relocs that it
-   decides to copy as dynamic relocs in check_relocs for each symbol.
-   This is so that it can later discard them if they are found to be
-   unnecessary.  We store the information in a field extending the
-   regular ELF linker hash table.  */
-
-struct elf_m32r_dyn_relocs
-{
-  struct elf_m32r_dyn_relocs *next;
-
-  /* The input section of the reloc.  */
-  asection *sec;
-
-  /* Total number of relocs copied for the input section.  */
-  bfd_size_type count;
-
-  /* Number of pc-relative relocs copied for the input section.  */
-  bfd_size_type pc_count;
-};
-
-
 /* m32r ELF linker hash entry.  */
 
 struct elf_m32r_link_hash_entry
@@ -1513,7 +1492,7 @@ struct elf_m32r_link_hash_entry
   struct elf_link_hash_entry root;
 
   /* Track dynamic relocs copied for this symbol.  */
-  struct elf_m32r_dyn_relocs *dyn_relocs;
+  struct elf_dyn_relocs *dyn_relocs;
 };
 
 /* m32r ELF linker hash table.  */
@@ -1726,14 +1705,14 @@ m32r_elf_copy_indirect_symbol (struct bfd_link_info *info,
     {
       if (edir->dyn_relocs != NULL)
         {
-          struct elf_m32r_dyn_relocs **pp;
-          struct elf_m32r_dyn_relocs *p;
+          struct elf_dyn_relocs **pp;
+          struct elf_dyn_relocs *p;
 
           /* Add reloc counts against the indirect sym to the direct sym
              list.  Merge any entries against the same section.  */
           for (pp = &eind->dyn_relocs; (p = *pp) != NULL;)
             {
-              struct elf_m32r_dyn_relocs *q;
+              struct elf_dyn_relocs *q;
 
               for (q = edir->dyn_relocs; q != NULL; q = q->next)
                 if (q->sec == p->sec)
@@ -1762,7 +1741,7 @@ m32r_elf_copy_indirect_symbol (struct bfd_link_info *info,
 static asection *
 readonly_dynrelocs (struct elf_link_hash_entry *h)
 {
-  struct elf_m32r_dyn_relocs *p;
+  struct elf_dyn_relocs *p;
   struct elf_m32r_link_hash_entry *eh = (struct elf_m32r_link_hash_entry *) h;
 
   for (p = eh->dyn_relocs; p != NULL; p = p->next)
@@ -1786,8 +1765,6 @@ m32r_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
 				struct elf_link_hash_entry *h)
 {
   struct elf_m32r_link_hash_table *htab;
-  struct elf_m32r_link_hash_entry *eh;
-  struct elf_m32r_dyn_relocs *p;
   bfd *dynobj;
   asection *s;
 
@@ -1859,24 +1836,15 @@ m32r_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
     return TRUE;
 
   /* If -z nocopyreloc was given, we won't generate them either.  */
-  if (info->nocopyreloc)
+  if (0 && info->nocopyreloc)
     {
       h->non_got_ref = 0;
       return TRUE;
     }
 
-  eh = (struct elf_m32r_link_hash_entry *) h;
-  for (p = eh->dyn_relocs; p != NULL; p = p->next)
-    {
-      s = p->sec->output_section;
-      if (s != NULL && (s->flags & (SEC_READONLY | SEC_HAS_CONTENTS)) != 0)
-        break;
-    }
-
-  /* If we didn't find any dynamic relocs in sections which needs the
-     copy reloc, then we'll be keeping the dynamic relocs and avoiding
-     the copy reloc.  */
-  if (p == NULL)
+  /* If we don't find any dynamic relocs in read-only sections, then
+     we'll be keeping the dynamic relocs and avoiding the copy reloc.  */
+  if (0 && !readonly_dynrelocs (h))
     {
       h->non_got_ref = 0;
       return TRUE;
@@ -1925,7 +1893,7 @@ allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
   struct bfd_link_info *info;
   struct elf_m32r_link_hash_table *htab;
   struct elf_m32r_link_hash_entry *eh;
-  struct elf_m32r_dyn_relocs *p;
+  struct elf_dyn_relocs *p;
 
   if (h->root.type == bfd_link_hash_indirect)
     return TRUE;
@@ -2034,7 +2002,7 @@ allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
           && (h->forced_local
               || info->symbolic))
         {
-          struct elf_m32r_dyn_relocs **pp;
+          struct elf_dyn_relocs **pp;
 
           for (pp = &eh->dyn_relocs; (p = *pp) != NULL;)
             {
@@ -2185,9 +2153,9 @@ m32r_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
 
       for (s = ibfd->sections; s != NULL; s = s->next)
         {
-          struct elf_m32r_dyn_relocs *p;
+          struct elf_dyn_relocs *p;
 
-          for (p = ((struct elf_m32r_dyn_relocs *)
+          for (p = ((struct elf_dyn_relocs *)
                     elf_section_data (s)->local_dynrel);
                p != NULL;
                p = p->next)
@@ -3739,8 +3707,8 @@ m32r_elf_check_relocs (bfd *abfd,
                   && (h->root.type == bfd_link_hash_defweak
                       || !h->def_regular)))
             {
-              struct elf_m32r_dyn_relocs *p;
-              struct elf_m32r_dyn_relocs **head;
+              struct elf_dyn_relocs *p;
+              struct elf_dyn_relocs **head;
 
               if (dynobj == NULL)
                 htab->root.dynobj = dynobj = abfd;
@@ -3778,7 +3746,7 @@ m32r_elf_check_relocs (bfd *abfd,
 		    s = sec;
 
 		  vpp = &elf_section_data (s)->local_dynrel;
-                  head = (struct elf_m32r_dyn_relocs **) vpp;
+                  head = (struct elf_dyn_relocs **) vpp;
                 }
 
               p = *head;