Support for more than 64k ELF sections.

include/elf/ChangeLog
	* external.h (Elf_External_Sym_Shndx): Declare.
	* internal.h (struct elf_internal_sym <st_shndx>): Make it an
	unsigned int.
	* common.h (SHN_BAD): Define.

bfd/ChangeLog
	* configure.in: Bump bfd version.
	* configure: Regenerate.
	* elf-bfd.h (elf_size_info <swap_symbol_out>): Add shndx param.
	(bfd_elf32_swap_symbol_in): Likewise.
	(bfd_elf32_swap_symbol_out): Likewise.
	(bfd_elf64_swap_symbol_in): Likewise.
	(bfd_elf64_swap_symbol_out): Likewise.
	(elf_reloc_cookie): Add locsym_shndx field.  Make locsyms a PTR.
	(elf_obj_tdata): Add num_elf_sections, symtab_shndx_hdr and
	symtab_shndx_section.
	(elf_numsections): Define.
	(elf_symtab_shndx): Define.
	* elf.c (setup_group): Use elf_numsections rather than header e_shnum.
	(bfd_elf_find_section): Likewise.
	(bfd_section_from_elf_index): Likewise.
	(bfd_section_from_shdr): Likewise.  Handle SHT_SYMTAB_SHNDX.
	(bfd_section_from_r_symndx): Read symbol shndx extension, and
	translate st_shndx for > SHN_HIRESERVE.
	(assign_section_numbers): Skip reserved sections.  Assign
	symtab_shndx_section and elf_numsections.  Exclude reserved
	sections from e_shnum.  Set up symtab_shndx_hdr.
	(_bfd_elf_compute_section_file_positions): Handle symtab_shndx_hdr.
	(map_sections_to_segments): Don't map eh_frame_hdr unless required.
	(assign_file_positions_except_relocs): Use elf_numsections rather
	than header e_shnum.  Skip reserved sections and symtab_shndx_section.
	(prep_headers): Set name for symtab_shndx_hdr.
	(_bfd_elf_assign_file_positions_for_relocs): Use elf_numsections.
	(_bfd_elf_write_object_contents): Likewise.  Skip reserved sections.
	(_bfd_elf_section_from_bfd_section): Check bfd_{abs,com,und}_section
	first.  Use elf_section_data if available.  Use elf_numsections.
	Start scan at index 1.
	(copy_private_bfd_data ): Comment fixes.
	(MAP_ONESYMTAB): Define above SHN_HIOS.
	(MAP_DYNSYMTAB): Likewise.
	(MAP_STRTAB): Likewise.
	(MAP_SHSTRTAB): Likewise.
	(MAP_SYM_SHNDX): New define.
	(_bfd_elf_copy_private_symbol_data): Handle symtab_shndx_section.
	(swap_out_syms): Swap out SHT_SYMTAB_SHNDX section too.
	* elfcode.h (elf_swap_symbol_in): Add shndx param, and handle shndx
	extension.
	(elf_swap_symbol_out): Likewise.
	(elf_object_p): Set elf_numsections, and use instead of e_shnum.
	Initialialise reserved elf_elfsections to point at shdr[0].  Remove
	redundant bfd_release calls.
	(elf_slurp_symbol_table): Read symbol shndx extension, and use with
	elf_swap_symbol_in.  Translate st_shndx for > SHN_HIRESERVE too.
	* elflink.h (elf_link_is_defined_archive_symbol): Read symbol shndx
	extension, and use with elf_swap_symbol_in.
	(elf_link_record_local_dynamic_symbol): Likewise.
	(elf_link_add_object_symbols): Likewise.  Also translate st_shndx
	for elf sections > SHN_HIRESERVE.
	(NAME(bfd_elf,size_dynamic_sections)): Adjust elf_swap_symbol_out
	call.
	(struct elf_final_link_info): Add locsym_shndx and symshndxbuf.
	(elf_bfd_final_link): Allocate the above, and tidy code allocating
	other buffers.  Use elf_numsections instead of e_shnum.  Adjust
	elf_swap_symbol_out calls.
	(elf_link_output_sym): Swap out symbol shndx extension too.
	(elf_link_flush_output_syms): And flush them to disk.
	(elf_link_output_extsym): Use SHN_BAD.  Adjust elf_swap_symbol_out
	calls.
	(elf_gc_mark): Read symbol shndx extension, and use with
	elf_swap_symbol_in.
	(elf_link_input_bfd): Likewise,  Translate st_shndx for elf sections
	> SHN_HIRESERVE too.  Use SHN_BAD.
	(elf_reloc_symbol_deleted_p): Use symbol shndx extensions with
	elf_swap_symbol_in.  Translate st_shndx > SHN_HIRESERVE too.
	(elf_bfd_discard_info): Read symbol shndx extension.  Don't attempt
	to continue after a bfd error.
	* elf-m10200.c (mn10200_elf_relax_section): Only read local syms.
	Stash them immediately to symtab_hdr->contents rather than later
	in multiple places.  Clean up afterwards.  Read symbol shndx
	extension, and use with swap_symbol_in.  Translate SHN_UNDEF,
	SHN_ABS, SHN_COMMON and elf sections > SHN_HIRESERVE to bfd
	sections too.  Remove dead code.
	(mn10200_elf_relax_delete_bytes): Use symbol shndx extension
	when swapping in symbols.  Tidy code adjusting global syms.
	Don't swap in global syms.
	(mn10200_elf_symbol_address_p): Likewise.  Remove extsyms param.
	(mn10200_elf_get_relocated_section_contents): Read symbol shndx
	extension, and use with swap_symbol_in.  Rename "size" -> "amt"
	to maximize code in common with other files.  Translate st_shndx
	for > SHN_HIRESERVE too.  Remove dead code.
	* elf-m10300.c (mn10300_elf_relax_section): Only read local syms.
	Stash them immediately to symtab_hdr->contents rather than later
	in multiple places.  Clean up afterwards.  Read symbol shndx
	extension, and use with swap_symbol_in.  Remove dead code.
	(mn10300_elf_relax_delete_bytes): As for elf-m10200.c.
	(mn10300_elf_symbol_address_p): Likewise.
	(mn10300_elf_get_relocated_section_contents): Likewise.
	* elf32-h8300.c (elf32_h8_relax_section): As for elf-m10300.c.
	(elf32_h8_relax_delete_bytes): Likewise.
	(elf32_h8_symbol_address_p): Likewise.
	(elf32_h8_get_relocated_section_contents): Likewise.
	* elf32-hppa.c (elf32_hppa_size_stubs): Read symbol shndx
	extension, and use with swap_symbol_in.
	* elf64-hppa.c (elf64_hppa_check_relocs): Likewise.
	* elf32-i370.c (i370_elf_finish_dynamic_sections): Adjust call to
	bfd_elf32_swap_symbol_out.
	* elf32-m32r.c (m32r_elf_get_relocated_section_contents): Translate
	elf sections > SHN_HIRESERVE too.
	* elf32-m68k.c (bfd_m68k_elf32_create_embedded_relocs): Only read
	local syms.  Read symbol shndx extension, and use with swap_symbol_in.
	* elf32-mips.c (_bfd_mips_elf_final_write_processing): Use
	elf_numsections rather than header e_shnum.
	* elf32-sh.c (sh_elf_relax_section): As for elf-m10300.c.
	(sh_elf_relax_delete_bytes): Likewise.
	(sh_elf_get_relocated_section_contents): Likewise.  Only read local
	symbols.
	* elf32-v850.c (v850_elf_symbol_processing): Use an unsigned int to
	hold section index.  Use elf_numsections rather than e_shnum.
	Rename "index" -> "indx" to avoid shadowing warning.
	(v850_elf_add_symbol_hook): Likewise.
	* elf64-alpha.c (elf64_alpha_relax_section): Only read local syms.
	Read symbol shndx extension, and use with swap_symbol_in.
	* elf32-xstormy16.c (xstormy16_elf_relax_section): Likewise.
	Translate SHN_COMMON and elf sections > SHN_HIRESERVE too.
	* elfxx-ia64.c (elfNN_ia64_relax_section): Likewise.
	(elfNN_ia64_aix_add_symbol_hook): Use elf_numsections.

	* elf-m10300.c (mn10300_elf_gc_mark_hook): Remove unnecessary checks
	before calling bfd_section_from_elf_index on local syms.
	* elf32-arm.h (elf32_arm_gc_mark_hook): Likewise.
	* elf32-avr.c (elf32_avr_gc_mark_hook): Likewise.
	* elf32-cris.c (cris_elf_gc_mark_hook): Likewise.
	* elf32-d10v.c (elf32_d10v_gc_mark_hook): Likewise.
	* elf32-fr30.c (fr30_elf_gc_mark_hook): Likewise.
	* elf32-hppa.c (elf32_hppa_gc_mark_hook): Likewise.
	* elf32-i386.c (elf_i386_gc_mark_hook): Likewise.
	* elf32-m32r.c (m32r_elf_gc_mark_hook): Likewise.
	* elf32-m68k.c (elf_m68k_gc_mark_hook): Likewise.
	* elf32-mcore.c (mcore_elf_gc_mark_hook): Likewise.
	* elf32-mips.c (_bfd_mips_elf_gc_mark_hook): Likewise.
	* elf32-openrisc.c (openrisc_elf_gc_mark_hook): Likewise.
	* elf32-ppc.c (ppc_elf_gc_mark_hook): Likewise.
	* elf32-s390.c (elf_s390_gc_mark_hook): Likewise.
	* elf32-sh.c (sh_elf_gc_mark_hook): Likewise.
	* elf32-sparc.c (elf32_sparc_gc_mark_hook): Likewise.
	* elf32-v850.c (v850_elf_gc_mark_hook): Likewise.
	* elf32-xstormy16.c (xstormy16_elf_gc_mark_hook): Likewise.
	* elf64-mips.c (mips_elf64_gc_mark_hook): Likewise.
	* elf64-mmix.c (mmix_elf_gc_mark_hook): Likewise.
	* elf64-ppc.c (ppc64_elf_gc_mark_hook): Likewise.
	* elf64-s390.c (elf_s390_gc_mark_hook): Likewise.
	* elf64-x86-64.c (elf64_x86_64_gc_mark_hook): Likewise.

binutils/ChangeLog
	* readelf.c (symtab_shndx_hdr): New global.
	(SECTION_HEADER_INDEX): Define.
	(SECTION_HEADER_NUM): Define.
	(SECTION_HEADER): Define.
	(GET_ELF_SYMBOLS): Pass two params rather than three.
	(get_32bit_elf_symbols): Take file and section args.  Read and
	use SHT_SYMTAB_SHNDX.
	(get_64bit_elf_symbols): Likewise.
	(dump_relocations): Use SECTION_HEADER to index "section_headers".
	(process_section_headers): Likewise.  Use SECTION_HEADER_NUM too.
	Remember symtab_shdx_hdr.
	(process_program_headers): Scan from index 1 for segment map.
	(slurp_ia64_unwind_table): Use SECTION_HEADER to index
	"section_headers".
	(process_relocs): Likewise.  Also adjust call to GET_ELF_SYMBOLS.
	(process_unwind): Likewise.
	(process_version_sections): Likewise.
	(process_symbol_table): Likewise.
	(display_debug_info): Likewise.
	(process_dynamic_segment): Fake up a symtab section for changed
	GET_ELF_SYMBOLS.
	(get_symbol_index_type): Check SHN_LOOS before SHN_LORESERVE.
	(process_program_headers): Kill signed/unsigned warning.
	(load_debug_str): Likewise.
	(display_debug_info): Likewise.

1 files changed, 68 insertions, 26 deletions

diff --git a/bfd/elfcode.h b/bfd/elfcode.h
index 892ae7a332..9d98bc9dfb 100644
--- a/bfd/elfcode.h
+++ b/bfd/elfcode.h
@@ -203,9 +203,10 @@ static char *elf_symbol_flags PARAMS ((flagword));
    format.  */
 
 void
-elf_swap_symbol_in (abfd, src, dst)
+elf_swap_symbol_in (abfd, src, shndx, dst)
      bfd *abfd;
      const Elf_External_Sym *src;
+     const Elf_External_Sym_Shndx *shndx;
      Elf_Internal_Sym *dst;
 {
   int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;
@@ -219,24 +220,40 @@ elf_swap_symbol_in (abfd, src, dst)
   dst->st_info = H_GET_8 (abfd, src->st_info);
   dst->st_other = H_GET_8 (abfd, src->st_other);
   dst->st_shndx = H_GET_16 (abfd, src->st_shndx);
+  if (dst->st_shndx == SHN_XINDEX)
+    {
+      if (shndx == NULL)
+	abort ();
+      dst->st_shndx = H_GET_32 (abfd, shndx->est_shndx);
+    }
 }
 
 /* Translate an ELF symbol in internal format into an ELF symbol in external
    format.  */
 
 void
-elf_swap_symbol_out (abfd, src, cdst)
+elf_swap_symbol_out (abfd, src, cdst, shndx)
      bfd *abfd;
      const Elf_Internal_Sym *src;
      PTR cdst;
+     PTR shndx;
 {
+  unsigned int tmp;
   Elf_External_Sym *dst = (Elf_External_Sym *) cdst;
   H_PUT_32 (abfd, src->st_name, dst->st_name);
   H_PUT_WORD (abfd, src->st_value, dst->st_value);
   H_PUT_WORD (abfd, src->st_size, dst->st_size);
   H_PUT_8 (abfd, src->st_info, dst->st_info);
   H_PUT_8 (abfd, src->st_other, dst->st_other);
-  H_PUT_16 (abfd, src->st_shndx, dst->st_shndx);
+  tmp = src->st_shndx;
+  if (tmp > SHN_HIRESERVE)
+    {
+      if (shndx == NULL)
+	abort ();
+      H_PUT_32 (abfd, tmp, shndx);
+      tmp = SHN_XINDEX;
+    }
+  H_PUT_16 (abfd, tmp, dst->st_shndx);
 }
 
 /* Translate an ELF file header in external format into an ELF file header in
@@ -667,14 +684,17 @@ elf_object_p (abfd)
   if (i_ehdrp->e_shnum != 0)
     {
       Elf_Internal_Shdr *shdrp;
+      unsigned int num_sec;
 
       amt = sizeof (*i_shdrp) * i_ehdrp->e_shnum;
       i_shdrp = (Elf_Internal_Shdr *) bfd_alloc (abfd, amt);
       if (!i_shdrp)
 	goto got_no_match;
-      amt = sizeof (i_shdrp) * i_ehdrp->e_shnum;
-      if (i_ehdrp->e_shnum > SHN_LORESERVE)
-	amt += sizeof (i_shdrp) * (SHN_HIRESERVE + 1 - SHN_LORESERVE);
+      num_sec = i_ehdrp->e_shnum;
+      if (num_sec > SHN_LORESERVE)
+	num_sec += SHN_HIRESERVE + 1 - SHN_LORESERVE;
+      elf_numsections (abfd) = num_sec;
+      amt = sizeof (i_shdrp) * num_sec;
       elf_elfsections (abfd) = (Elf_Internal_Shdr **) bfd_alloc (abfd, amt);
       if (!elf_elfsections (abfd))
 	goto got_no_match;
@@ -682,14 +702,14 @@ elf_object_p (abfd)
       memcpy (i_shdrp, &i_shdr, sizeof (*i_shdrp));
       shdrp = i_shdrp;
       shindex = 0;
-      if (i_ehdrp->e_shnum > SHN_LORESERVE)
+      if (num_sec > SHN_LORESERVE)
 	{
 	  for ( ; shindex < SHN_LORESERVE; shindex++)
 	    elf_elfsections (abfd)[shindex] = shdrp++;
 	  for ( ; shindex < SHN_HIRESERVE + 1; shindex++)
-	    elf_elfsections (abfd)[shindex] = NULL;
+	    elf_elfsections (abfd)[shindex] = i_shdrp;
 	}
-      for ( ; shindex < i_ehdrp->e_shnum; shindex++)
+      for ( ; shindex < num_sec; shindex++)
 	elf_elfsections (abfd)[shindex] = shdrp++;
     }
 
@@ -752,6 +772,8 @@ elf_object_p (abfd)
 
   if (i_ehdrp->e_shstrndx != 0)
     {
+      unsigned int num_sec;
+
       shstrtab = bfd_elf_get_str_section (abfd, i_ehdrp->e_shstrndx);
       if (!shstrtab)
 	goto got_no_match;
@@ -759,11 +781,13 @@ elf_object_p (abfd)
       /* Once all of the section headers have been read and converted, we
 	 can start processing them.  Note that the first section header is
 	 a dummy placeholder entry, so we ignore it.  */
-
-      for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++)
+      num_sec = elf_numsections (abfd);
+      for (shindex = 1; shindex < num_sec; shindex++)
 	{
 	  if (! bfd_section_from_shdr (abfd, shindex))
 	    goto got_no_match;
+	  if (shindex == SHN_LORESERVE - 1)
+	    shindex += SHN_HIRESERVE + 1 - SHN_LORESERVE;
 	}
     }
 
@@ -809,11 +833,6 @@ elf_object_p (abfd)
   bfd_default_set_arch_mach (abfd, previous_arch, previous_mach);
   bfd_set_error (bfd_error_wrong_format);
  got_no_match:
-  if (new_tdata != NULL
-      && new_tdata->elf_sect_ptr != NULL)
-    bfd_release (abfd, new_tdata->elf_sect_ptr);
-  if (i_shdrp != NULL)
-    bfd_release (abfd, i_shdrp);
   if (new_tdata != NULL)
     bfd_release (abfd, new_tdata);
   elf_tdata (abfd) = preserved_tdata;
@@ -1079,6 +1098,7 @@ elf_slurp_symbol_table (abfd, symptrs, dynamic)
   elf_symbol_type *symbase;	/* Buffer for generated bfd symbols */
   Elf_Internal_Sym i_sym;
   Elf_External_Sym *x_symp = NULL;
+  Elf_External_Sym_Shndx *x_shndx = NULL;
   Elf_External_Versym *x_versymp = NULL;
   bfd_size_type amt;
 
@@ -1094,8 +1114,23 @@ elf_slurp_symbol_table (abfd, symptrs, dynamic)
 
   if (! dynamic)
     {
+      Elf_Internal_Shdr *shndx_hdr;
+
       hdr = &elf_tdata (abfd)->symtab_hdr;
+      shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
       verhdr = NULL;
+
+      /* If we have a SHT_SYMTAB_SHNDX section for the symbol table,
+	 read the raw contents.  */
+      if (elf_elfsections (abfd)[shndx_hdr->sh_link] == hdr)
+	{
+	  amt = shndx_hdr->sh_size;
+	  x_shndx = (Elf_External_Sym_Shndx *) bfd_malloc (amt);
+	  if (x_shndx == NULL
+	      || bfd_seek (abfd, shndx_hdr->sh_offset, SEEK_SET) != 0
+	      || bfd_bread ((PTR) x_shndx, amt, abfd) != amt)
+	    goto error_return;
+	}
     }
   else
     {
@@ -1115,7 +1150,7 @@ elf_slurp_symbol_table (abfd, symptrs, dynamic)
     }
 
   if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0)
-    return -1;
+    goto error_return;
 
   symcount = hdr->sh_size / sizeof (Elf_External_Sym);
 
@@ -1126,20 +1161,20 @@ elf_slurp_symbol_table (abfd, symptrs, dynamic)
       unsigned long i;
 
       if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0)
-	return -1;
+	goto error_return;
 
       amt = symcount;
       amt *= sizeof (elf_symbol_type);
       symbase = (elf_symbol_type *) bfd_zalloc (abfd, amt);
       if (symbase == (elf_symbol_type *) NULL)
-	return -1;
+	goto error_return;
       sym = symbase;
 
       /* Temporarily allocate room for the raw ELF symbols.  */
       amt = symcount;
       amt *= sizeof (Elf_External_Sym);
       x_symp = (Elf_External_Sym *) bfd_malloc (amt);
-      if (x_symp == NULL && symcount != 0)
+      if (x_symp == NULL)
 	goto error_return;
 
       if (bfd_bread ((PTR) x_symp, amt, abfd) != amt)
@@ -1178,7 +1213,8 @@ elf_slurp_symbol_table (abfd, symptrs, dynamic)
       /* Skip first symbol, which is a null dummy.  */
       for (i = 1; i < symcount; i++)
 	{
-	  elf_swap_symbol_in (abfd, x_symp + i, &i_sym);
+	  elf_swap_symbol_in (abfd, x_symp + i,
+			      x_shndx + (x_shndx != NULL ? i : 0), &i_sym);
 	  memcpy (&sym->internal_elf_sym, &i_sym, sizeof (Elf_Internal_Sym));
 #ifdef ELF_KEEP_EXTSYM
 	  memcpy (&sym->native_elf_sym, x_symp + i, sizeof (Elf_External_Sym));
@@ -1191,7 +1227,12 @@ elf_slurp_symbol_table (abfd, symptrs, dynamic)
 
 	  sym->symbol.value = i_sym.st_value;
 
-	  if (i_sym.st_shndx > 0 && i_sym.st_shndx < SHN_LORESERVE)
+	  if (i_sym.st_shndx == SHN_UNDEF)
+	    {
+	      sym->symbol.section = bfd_und_section_ptr;
+	    }
+	  else if (i_sym.st_shndx < SHN_LORESERVE
+		   || i_sym.st_shndx > SHN_HIRESERVE)
 	    {
 	      sym->symbol.section = section_from_elf_index (abfd,
 							    i_sym.st_shndx);
@@ -1216,10 +1257,6 @@ elf_slurp_symbol_table (abfd, symptrs, dynamic)
 		 moment) about the alignment.  */
 	      sym->symbol.value = i_sym.st_size;
 	    }
-	  else if (i_sym.st_shndx == SHN_UNDEF)
-	    {
-	      sym->symbol.section = bfd_und_section_ptr;
-	    }
 	  else
 	    sym->symbol.section = bfd_abs_section_ptr;
 
@@ -1306,12 +1343,17 @@ elf_slurp_symbol_table (abfd, symptrs, dynamic)
       *symptrs = 0;		/* Final null pointer */
     }
 
+  if (x_shndx != NULL)
+    free (x_shndx);
   if (x_versymp != NULL)
     free (x_versymp);
   if (x_symp != NULL)
     free (x_symp);
   return symcount;
+
 error_return:
+  if (x_shndx != NULL)
+    free (x_shndx);
   if (x_versymp != NULL)
     free (x_versymp);
   if (x_symp != NULL)