Blame SOURCES/binutils-speed-up-objdump.patch

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--- binutils.orig/binutils/objdump.c	2018-03-05 17:04:19.901619738 +0000
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+++ binutils-2.29/binutils/objdump.c	2018-03-05 17:10:08.334643096 +0000
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@@ -664,9 +664,7 @@ slurp_dynamic_symtab (bfd *abfd)
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 static bfd_boolean
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 is_significant_symbol_name (const char * name)
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 {
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-  return strcmp (name, ".plt") == 0
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-    ||   strcmp (name, ".got") == 0
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-    ||   strcmp (name, ".plt.got") == 0;
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+  return strncmp (name, ".plt", 4) == 0 || strcmp (name, ".got") == 0;
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 }
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 /* Filter out (in place) symbols that are useless for disassembly.
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@@ -937,6 +935,7 @@ find_symbol_for_address (bfd_vma vma,
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   asection *sec;
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   unsigned int opb;
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   bfd_boolean want_section;
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+  long rel_count;
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   if (sorted_symcount < 1)
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     return NULL;
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@@ -1065,33 +1064,59 @@ find_symbol_for_address (bfd_vma vma,
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      and we have dynamic relocations available, then we can produce
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      a better result by matching a relocation to the address and
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      using the symbol associated with that relocation.  */
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+  rel_count = aux->dynrelcount;
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   if (!want_section
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-      && aux->dynrelbuf != NULL
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       && sorted_syms[thisplace]->value != vma
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+      && rel_count > 0
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+      && aux->dynrelbuf != NULL
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+      && aux->dynrelbuf[0]->address <= vma
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+      && aux->dynrelbuf[rel_count - 1]->address >= vma
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       /* If we have matched a synthetic symbol, then stick with that.  */
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       && (sorted_syms[thisplace]->flags & BSF_SYNTHETIC) == 0)
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     {
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-      long        rel_count;
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-      arelent **  rel_pp;
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+      arelent **  rel_low;
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+      arelent **  rel_high;
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-      for (rel_count = aux->dynrelcount, rel_pp = aux->dynrelbuf;
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-	   rel_count--;)
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+      rel_low = aux->dynrelbuf;
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+      rel_high = rel_low + rel_count - 1;
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+      while (rel_low <= rel_high)
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 	{
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-	  arelent * rel = rel_pp[rel_count];
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+	  arelent ** rel_mid = &rel_low[(rel_high - rel_low) / 2];
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+	  arelent *  rel = *rel_mid;
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-	  if (rel->address == vma
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-	      && rel->sym_ptr_ptr != NULL
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-	      /* Absolute relocations do not provide a more helpful symbolic address.  */
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-	      && ! bfd_is_abs_section ((* rel->sym_ptr_ptr)->section))
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+	  if (rel->address == vma)
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 	    {
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-	      if (place != NULL)
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-		* place = thisplace;
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-	      return * rel->sym_ptr_ptr;
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+	      /* Absolute relocations do not provide a more helpful
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+	         symbolic address.  Find a non-absolute relocation
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+	         with the same address.  */
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+
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+	      arelent **rel_vma = rel_mid;
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+
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+	      for (rel_mid--;
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+		   rel_mid >= rel_low && rel_mid[0]->address == vma;
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+		   rel_mid--)
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+		rel_vma = rel_mid;
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+
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+	      for (; rel_vma <= rel_high && rel_vma[0]->address == vma;
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+		   rel_vma++)
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+		{
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+		  rel = *rel_vma;
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+		  if (rel->sym_ptr_ptr != NULL
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+		      && ! bfd_is_abs_section ((* rel->sym_ptr_ptr)->section))
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+		    {
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+		      if (place != NULL)
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+			* place = thisplace;
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+		      return * rel->sym_ptr_ptr;
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+		    }
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+		}
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+	      break;
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 	    }
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-	  /* We are scanning backwards, so if we go below the target address
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-	     we have failed.  */
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-	  if (rel_pp[rel_count]->address < vma)
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+	  if (vma < rel->address)
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+	    rel_high = rel_mid;
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+	  else if (vma >= rel_mid[1]->address)
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+	    rel_low = rel_mid + 1;
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+	  else
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 	    break;
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 	}
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     }