* elf-bfd.h (struct elf_backend_data): Reorder collect and

type_change_ok; add sign_extend_vma.
        * elf32-mips.c (elf_backend_sign_extend_vma): Define.
        * elfcode.h (elf_swap_symbol_in): Mind be->sign_extend_vma.
        (elf_swap_shdr_in, elf_swap_phdr_in): Likewise.
        * elfxx-target.h (elf_backend_sign_extend_vma): Default.
        (elfNN_bed): Follow struture changes.

bfd/ChangeLog

@@ -1,3 +1,13 @@
+1999-11-17  Richard Henderson  <rth@cygnus.com>
+
+	* elf-bfd.h (struct elf_backend_data): Reorder collect and
+	type_change_ok; add sign_extend_vma.
+	* elf32-mips.c (elf_backend_sign_extend_vma): Define.
+	* elfcode.h (elf_swap_symbol_in): Mind be->sign_extend_vma.
+	(elf_swap_shdr_in, elf_swap_phdr_in): Likewise.
+	* elfxx-target.h (elf_backend_sign_extend_vma): Default.
+	(elfNN_bed): Follow struture changes.
+
 1999-11-09  Ian Lance Taylor  <ian@zembu.com>
 
 	* libbfd.c (bfd_read): Check result of read against desired result

bfd/elf-bfd.h

@@ -332,18 +332,6 @@ struct elf_backend_data
   /* The maximum page size for this backend.  */
   bfd_vma maxpagesize;
 
-  /* This is true if the linker should act like collect and gather
-     global constructors and destructors by name.  This is true for
-     MIPS ELF because the Irix 5 tools can not handle the .init
-     section.  */
-  boolean collect;
-
-  /* This is true if the linker should ignore changes to the type of a
-     symbol.  This is true for MIPS ELF because some Irix 5 objects
-     record undefined functions as STT_OBJECT although the definitions
-     are STT_FUNC.  */
-  boolean type_change_ok;
-
   /* A function to translate an ELF RELA relocation to a BFD arelent
      structure.  */
   void (*elf_info_to_howto) PARAMS ((bfd *, arelent *,
@@ -618,6 +606,18 @@ struct elf_backend_data
   bfd_vma got_header_size;
   bfd_vma plt_header_size;
 
+  /* This is true if the linker should act like collect and gather
+     global constructors and destructors by name.  This is true for
+     MIPS ELF because the Irix 5 tools can not handle the .init
+     section.  */
+  unsigned collect : 1;
+
+  /* This is true if the linker should ignore changes to the type of a
+     symbol.  This is true for MIPS ELF because some Irix 5 objects
+     record undefined functions as STT_OBJECT although the definitions
+     are STT_FUNC.  */
+  unsigned type_change_ok : 1;
+
   /* Whether the backend may use REL relocations.  (Some backends use
      both REL and RELA relocations, and this flag is set for those
      backends.)  */
@@ -635,6 +635,10 @@ struct elf_backend_data
      section.  */   
   unsigned default_use_rela_p : 1;
 
+  /* True if addresses "naturally" sign extend.  This is used when
+     swapping in from Elf32 when BFD64.  */
+  unsigned sign_extend_vma : 1;
+
   unsigned want_got_plt : 1;
   unsigned plt_readonly : 1;
   unsigned want_plt_sym : 1;

bfd/elf32-mips.c

@@ -8809,6 +8809,7 @@ static const struct ecoff_debug_swap mips_elf32_ecoff_debug_swap =
 #define elf_backend_collect		true
 #define elf_backend_type_change_ok	true
 #define elf_backend_can_gc_sections	true
+#define elf_backend_sign_extend_vma	true
 #define elf_info_to_howto		mips_info_to_howto_rela
 #define elf_info_to_howto_rel		mips_info_to_howto_rel
 #define elf_backend_sym_is_global	mips_elf_sym_is_global

bfd/elfcode.h

@@ -207,7 +207,12 @@ elf_swap_symbol_in (abfd, src, dst)
      const Elf_External_Sym *src;
      Elf_Internal_Sym *dst;
 {
+  int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;
+
   dst->st_name = bfd_h_get_32 (abfd, (bfd_byte *) src->st_name);
+  if (signed_vma)
+    dst->st_value = get_signed_word (abfd, (bfd_byte *) src->st_value);
+  else
     dst->st_value = get_word (abfd, (bfd_byte *) src->st_value);
   dst->st_size = get_word (abfd, (bfd_byte *) src->st_size);
   dst->st_info = bfd_h_get_8 (abfd, (bfd_byte *) src->st_info);
@@ -295,9 +300,14 @@ elf_swap_shdr_in (abfd, src, dst)
      const Elf_External_Shdr *src;
      Elf_Internal_Shdr *dst;
 {
+  int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;
+
   dst->sh_name = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_name);
   dst->sh_type = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_type);
   dst->sh_flags = get_word (abfd, (bfd_byte *) src->sh_flags);
+  if (signed_vma)
+    dst->sh_addr = get_signed_word (abfd, (bfd_byte *) src->sh_addr);
+  else
     dst->sh_addr = get_word (abfd, (bfd_byte *) src->sh_addr);
   dst->sh_offset = get_word (abfd, (bfd_byte *) src->sh_offset);
   dst->sh_size = get_word (abfd, (bfd_byte *) src->sh_size);
@@ -341,11 +351,21 @@ elf_swap_phdr_in (abfd, src, dst)
      const Elf_External_Phdr *src;
      Elf_Internal_Phdr *dst;
 {
+  int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;
+
   dst->p_type = bfd_h_get_32 (abfd, (bfd_byte *) src->p_type);
   dst->p_flags = bfd_h_get_32 (abfd, (bfd_byte *) src->p_flags);
   dst->p_offset = get_word (abfd, (bfd_byte *) src->p_offset);
+  if (signed_vma)
+    {
+      dst->p_vaddr = get_signed_word (abfd, (bfd_byte *) src->p_vaddr);
+      dst->p_paddr = get_signed_word (abfd, (bfd_byte *) src->p_paddr);
+    }
+  else
+    {
       dst->p_vaddr = get_word (abfd, (bfd_byte *) src->p_vaddr);
       dst->p_paddr = get_word (abfd, (bfd_byte *) src->p_paddr);
+    }
   dst->p_filesz = get_word (abfd, (bfd_byte *) src->p_filesz);
   dst->p_memsz = get_word (abfd, (bfd_byte *) src->p_memsz);
   dst->p_align = get_word (abfd, (bfd_byte *) src->p_align);

bfd/elfxx-target.h

@@ -338,6 +338,10 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
 #define elf_backend_size_info _bfd_elfNN_size_info
 #endif
 
+#ifndef elf_backend_sign_extend_vma
+#define elf_backend_sign_extend_vma 0
+#endif
+
 extern const struct elf_size_info _bfd_elfNN_size_info;
 
 static CONST struct elf_backend_data elfNN_bed =
@@ -345,8 +349,6 @@ static CONST struct elf_backend_data elfNN_bed =
   ELF_ARCH,			/* arch */
   ELF_MACHINE_CODE,		/* elf_machine_code */
   ELF_MAXPAGESIZE,		/* maxpagesize */
-  elf_backend_collect,
-  elf_backend_type_change_ok,
   elf_info_to_howto,
   elf_info_to_howto_rel,
   elf_backend_sym_is_global,
@@ -384,9 +386,12 @@ static CONST struct elf_backend_data elfNN_bed =
   elf_backend_got_symbol_offset,
   elf_backend_got_header_size,
   elf_backend_plt_header_size,
+  elf_backend_collect,
+  elf_backend_type_change_ok,
   elf_backend_may_use_rel_p,
   elf_backend_may_use_rela_p,
   elf_backend_default_use_rela_p,
+  elf_backend_sign_extend_vma,
   elf_backend_want_got_plt,
   elf_backend_plt_readonly,
   elf_backend_want_plt_sym,