x86: Add _bfd_x86_elf_get_synthetic_symtab

Move the common codes in elf_i386_get_synthetic_symtab and
elf_x86_64_get_synthetic_symtab to _bfd_x86_elf_get_synthetic_symtab.

	* elf32-i386.c (elf_i386_plt_type): Removed.
	(elf_i386_plt): Likewise.
	(elf_i386_get_synthetic_symtab): Updated.   Call
	_bfd_x86_elf_get_synthetic_symtab.
	* elf64-x86-64.c (elf_x86_64_plt_type): Removed.
	(elf_x86_64_plt): Likewise.
	(elf_x86_64_get_synthetic_symtab): Updated.  Call
	_bfd_x86_elf_get_synthetic_symtab.
	* elfxx-x86.c (elf_i386_get_plt_got_vma): New function.
	(elf_x86_64_get_plt_got_vma): Likewise.
	(elf_i386_valid_plt_reloc_p): Likewise.
	(elf_x86_64_valid_plt_reloc_p): Likewise.
	(_bfd_x86_elf_get_synthetic_symtab): Likewise.
	* elfxx-x86.h (elf_x86_plt_type): New.
	(elf_x86_plt): Likewise.
	(_bfd_x86_elf_get_synthetic_symtab): Likewise.

1 files changed, 7 insertions, 181 deletions

diff --git a/bfd/elf64-x86-64.c b/bfd/elf64-x86-64.c
index 3bf465b46f..0edb17470c 100644
--- a/bfd/elf64-x86-64.c
+++ b/bfd/elf64-x86-64.c
@@ -5995,26 +5995,6 @@ elf_x86_64_output_arch_local_syms
   return TRUE;
 }
 
-enum elf_x86_64_plt_type
-{
-  plt_non_lazy = 0,
-  plt_lazy = 1 << 0,
-  plt_second = 1 << 1,
-  plt_unknown = -1
-};
-
-struct elf_x86_64_plt
-{
-  const char *name;
-  asection *sec;
-  bfd_byte *contents;
-  enum elf_x86_64_plt_type type;
-  unsigned int plt_got_offset;
-  unsigned int plt_got_insn_size;
-  unsigned int plt_entry_size;
-  long count;
-};
-
 /* Forward declaration.  */
 static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt;
 
@@ -6029,13 +6009,10 @@ elf_x86_64_get_synthetic_symtab (bfd *abfd,
 				 asymbol **dynsyms,
 				 asymbol **ret)
 {
-  long size, count, i, n, len;
+  long count, i, n;
   int j;
-  unsigned int plt_got_offset, plt_entry_size, plt_got_insn_size;
-  asymbol *s;
   bfd_byte *plt_contents;
-  long dynrelcount, relsize;
-  arelent **dynrelbuf, *p;
+  long relsize;
   const struct elf_x86_lazy_plt_layout *lazy_plt;
   const struct elf_x86_non_lazy_plt_layout *non_lazy_plt;
   const struct elf_x86_lazy_plt_layout *lazy_bnd_plt;
@@ -6043,9 +6020,8 @@ elf_x86_64_get_synthetic_symtab (bfd *abfd,
   const struct elf_x86_lazy_plt_layout *lazy_ibt_plt;
   const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt;
   asection *plt;
-  char *names;
-  enum elf_x86_64_plt_type plt_type;
-  struct elf_x86_64_plt plts[] =
+  enum elf_x86_plt_type plt_type;
+  struct elf_x86_plt plts[] =
     {
       { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 },
       { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 },
@@ -6213,159 +6189,9 @@ elf_x86_64_get_synthetic_symtab (bfd *abfd,
       plts[j].contents = plt_contents;
     }
 
-  if (count == 0)
-    return -1;
-
-  dynrelbuf = (arelent **) bfd_malloc (relsize);
-  if (dynrelbuf == NULL)
-    return -1;
-
-  dynrelcount = bfd_canonicalize_dynamic_reloc (abfd, dynrelbuf,
-						dynsyms);
-
-  /* Sort the relocs by address.  */
-  qsort (dynrelbuf, dynrelcount, sizeof (arelent *),
-	 _bfd_x86_elf_compare_relocs);
-
-  size = count * sizeof (asymbol);
-
-  /* Allocate space for @plt suffixes.  */
-  n = 0;
-  for (i = 0; i < dynrelcount; i++)
-    {
-      p = dynrelbuf[i];
-      size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
-      if (p->addend != 0)
-	size += sizeof ("+0x") - 1 + 8 + 8 * ABI_64_P (abfd);
-    }
-
-  s = *ret = (asymbol *) bfd_zmalloc (size);
-  if (s == NULL)
-    goto bad_return;
-
-  /* Check for each PLT section.  */
-  names = (char *) (s + count);
-  size = 0;
-  n = 0;
-  for (j = 0; plts[j].name != NULL; j++)
-    if ((plt_contents = plts[j].contents) != NULL)
-      {
-	long k;
-	bfd_vma offset;
-
-	plt_got_offset = plts[j].plt_got_offset;
-	plt_got_insn_size = plts[j].plt_got_insn_size;
-	plt_entry_size = plts[j].plt_entry_size;
-
-	plt = plts[j].sec;
-
-	if ((plts[j].type & plt_lazy))
-	  {
-	    /* Skip PLT0 in lazy PLT.  */
-	    k = 1;
-	    offset = plt_entry_size;
-	  }
-	else
-	  {
-	    k = 0;
-	    offset = 0;
-	  }
-
-	/* Check each PLT entry against dynamic relocations.  */
-	for (; k < plts[j].count; k++)
-	  {
-	    int off;
-	    bfd_vma got_vma;
-	    long min, max, mid;
-
-	    /* Get the PC-relative offset, a signed 32-bit integer.  */
-	    off = H_GET_32 (abfd, (plt_contents + offset
-				   + plt_got_offset));
-	    got_vma = plt->vma + offset + off + plt_got_insn_size;
-
-	    /* Binary search.  */
-	    p = dynrelbuf[0];
-	    min = 0;
-	    max = dynrelcount;
-	    while ((min + 1) < max)
-	      {
-		arelent *r;
-
-		mid = (min + max) / 2;
-		r = dynrelbuf[mid];
-		if (got_vma > r->address)
-		  min = mid;
-		else if (got_vma < r->address)
-		  max = mid;
-		else
-		  {
-		    p = r;
-		    break;
-		  }
-	      }
-
-	    /* Skip unknown relocation.  PR 17512: file: bc9d6cf5.  */
-	    if (got_vma == p->address
-		&& p->howto != NULL
-		&& (p->howto->type == R_X86_64_JUMP_SLOT
-		    || p->howto->type == R_X86_64_GLOB_DAT
-		    || p->howto->type == R_X86_64_IRELATIVE))
-	      {
-		*s = **p->sym_ptr_ptr;
-		/* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL
-		   set.  Since we are defining a symbol, ensure one
-		   of them is set.  */
-		if ((s->flags & BSF_LOCAL) == 0)
-		  s->flags |= BSF_GLOBAL;
-		s->flags |= BSF_SYNTHETIC;
-		/* This is no longer a section symbol.  */
-		s->flags &= ~BSF_SECTION_SYM;
-		s->section = plt;
-		s->the_bfd = plt->owner;
-		s->value = offset;
-		s->udata.p = NULL;
-		s->name = names;
-		len = strlen ((*p->sym_ptr_ptr)->name);
-		memcpy (names, (*p->sym_ptr_ptr)->name, len);
-		names += len;
-		if (p->addend != 0)
-		  {
-		    char buf[30], *a;
-
-		    memcpy (names, "+0x", sizeof ("+0x") - 1);
-		    names += sizeof ("+0x") - 1;
-		    bfd_sprintf_vma (abfd, buf, p->addend);
-		    for (a = buf; *a == '0'; ++a)
-		      ;
-		    size = strlen (a);
-		    memcpy (names, a, size);
-		    names += size;
-		  }
-		memcpy (names, "@plt", sizeof ("@plt"));
-		names += sizeof ("@plt");
-		n++;
-		s++;
-	      }
-	    offset += plt_entry_size;
-	  }
-      }
-
-  /* PLT entries with R_X86_64_TLSDESC relocations are skipped.  */
-  if (n == 0)
-    {
-bad_return:
-      count = -1;
-    }
-  else
-    count = n;
-
-  for (j = 0; plts[j].name != NULL; j++)
-    if (plts[j].contents != NULL)
-      free (plts[j].contents);
-
-  free (dynrelbuf);
-
-  return count;
+  return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize,
+					    (bfd_vma) 0, plts, dynsyms,
+					    ret);
 }
 
 /* Handle an x86-64 specific section when reading an object file.  This