* linker.c (_bfd_generic_link_add_one_symbol): Add constructor and

	bitsize arguments.  Changed all callers (aoutx.h).
	(default_indirect_link_order): Renamed from
	_bfd_generic_indirect_link_order and made static.
	(_bfd_generic_final_link): Don't switch on link_order type, just
	call _bfd_default_link_order.
	(_bfd_default_link_order): Handle bfd_indirect_link_order type.
	* genlink.h: Removed declaration of
	_bfd_generic_indirect_link_order.
	* elf32-mips.c (mips_elf_final_link): Don't switch on link_order
	type, just call _bfd_default_link_order.

1 files changed, 694 insertions, 84 deletions

diff --git a/bfd/elf32-mips.c b/bfd/elf32-mips.c
index c56df38..585187a 100644
--- a/bfd/elf32-mips.c
+++ b/bfd/elf32-mips.c
@@ -23,28 +23,48 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
 #include "bfd.h"
 #include "sysdep.h"
 #include "libbfd.h"
-#include "seclet.h"
+#include "bfdlink.h"
+#include "genlink.h"
 #include "libelf.h"
 #include "elf/mips.h"
 
+/* Get the ECOFF swapping routines.  */
+#include "coff/sym.h"
+#include "coff/symconst.h"
+#include "coff/internal.h"
+#include "coff/ecoff.h"
+#include "coff/mips.h"
+#define ECOFF_32
+#include "ecoffswap.h"
+
 static bfd_reloc_status_type mips_elf_hi16_reloc PARAMS ((bfd *abfd,
 							  arelent *reloc,
 							  asymbol *symbol,
 							  PTR data,
 							  asection *section,
-							  bfd *output_bfd));
+							  bfd *output_bfd,
+							  char **error));
+static bfd_reloc_status_type mips_elf_got16_reloc PARAMS ((bfd *abfd,
+							   arelent *reloc,
+							   asymbol *symbol,
+							   PTR data,
+							   asection *section,
+							   bfd *output_bfd,
+							   char **error));
 static bfd_reloc_status_type mips_elf_lo16_reloc PARAMS ((bfd *abfd,
 							  arelent *reloc,
 							  asymbol *symbol,
 							  PTR data,
 							  asection *section,
-							  bfd *output_bfd));
+							  bfd *output_bfd,
+							  char **error));
 static bfd_reloc_status_type mips_elf_gprel16_reloc PARAMS ((bfd *abfd,
 							     arelent *reloc,
 							     asymbol *symbol,
 							     PTR data,
 							     asection *section,
-							     bfd *output_bfd));
+							     bfd *output_bfd,
+							     char **error));
 
 #define USE_REL	1		/* MIPS uses REL relocations instead of RELA */
 
@@ -129,7 +149,10 @@ static reloc_howto_type elf_mips_howto_table[] =
 	 26,			/* bitsize */
 	 false,			/* pc_relative */
 	 0,			/* bitpos */
-	 complain_overflow_bitfield, /* complain_on_overflow */
+	 complain_overflow_dont, /* complain_on_overflow */
+	 			/* This needs complex overflow
+				   detection, because the upper four
+				   bits must match the PC.  */
 	 bfd_elf_generic_reloc,	/* special_function */
 	 "R_MIPS_26",		/* name */
 	 true,			/* partial_inplace */
@@ -206,7 +229,7 @@ static reloc_howto_type elf_mips_howto_table[] =
 	 false,			/* pc_relative */
 	 0,			/* bitpos */
 	 complain_overflow_signed, /* complain_on_overflow */
-	 bfd_elf_generic_reloc,	/* special_function */
+	 mips_elf_got16_reloc,	/* special_function */
 	 "R_MIPS_GOT16",	/* name */
 	 false,			/* partial_inplace */
 	 0,			/* src_mask */
@@ -276,22 +299,19 @@ mips_elf_hi16_reloc (abfd,
 		     symbol,
 		     data,
 		     input_section,
-		     output_bfd)
+		     output_bfd,
+		     error_message)
      bfd *abfd;
      arelent *reloc_entry;
      asymbol *symbol;
      PTR data;
      asection *input_section;
      bfd *output_bfd;
+     char **error_message;
 {
   bfd_reloc_status_type ret;
   bfd_vma relocation;
 
-  /* FIXME: The symbol _gp_disp requires special handling, which we do
-     not do.  */
-  if (strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0)
-    abort ();
-
   /* If we're relocating, and this an external symbol, we don't want
      to change anything.  */
   if (output_bfd != (bfd *) NULL
@@ -302,6 +322,11 @@ mips_elf_hi16_reloc (abfd,
       return bfd_reloc_ok;
     }
 
+  /* FIXME: The symbol _gp_disp requires special handling, which we do
+     not do.  */
+  if (strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0)
+    abort ();
+
   ret = bfd_reloc_ok;
   if (symbol->section == &bfd_und_section
       && output_bfd == (bfd *) NULL)
@@ -339,17 +364,20 @@ mips_elf_lo16_reloc (abfd,
 		     symbol,
 		     data,
 		     input_section,
-		     output_bfd)
+		     output_bfd,
+		     error_message)
      bfd *abfd;
      arelent *reloc_entry;
      asymbol *symbol;
      PTR data;
      asection *input_section;
      bfd *output_bfd;
+     char **error_message;
 {
   /* FIXME: The symbol _gp_disp requires special handling, which we do
      not do.  */
-  if (strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0)
+  if (output_bfd == (bfd *) NULL
+      && strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0)
     abort ();
 
   if (mips_hi16_addr != (bfd_byte *) NULL)
@@ -386,7 +414,57 @@ mips_elf_lo16_reloc (abfd,
 
   /* Now do the LO16 reloc in the usual way.  */
   return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
-				input_section, output_bfd);
+				input_section, output_bfd, error_message);
+}
+
+/* Do a R_MIPS_GOT16 reloc.  This is a reloc against the global offset
+   table used for PIC code.  If the symbol is an external symbol, the
+   instruction is modified to contain the offset of the appropriate
+   entry in the global offset table.  If the symbol is a section
+   symbol, the next reloc is a R_MIPS_LO16 reloc.  The two 16 bit
+   addends are combined to form the real addend against the section
+   symbol; the GOT16 is modified to contain the offset of an entry in
+   the global offset table, and the LO16 is modified to offset it
+   appropriately.  Thus an offset larger than 16 bits requires a
+   modified value in the global offset table.
+
+   This implementation suffices for the assembler, but the linker does
+   not yet know how to create global offset tables.  */
+
+static bfd_reloc_status_type
+mips_elf_got16_reloc (abfd,
+		      reloc_entry,
+		      symbol,
+		      data,
+		      input_section,
+		      output_bfd,
+		      error_message)
+     bfd *abfd;
+     arelent *reloc_entry;
+     asymbol *symbol;
+     PTR data;
+     asection *input_section;
+     bfd *output_bfd;
+     char **error_message;
+{
+  /* If we're relocating, and this an external symbol, we don't want
+     to change anything.  */
+  if (output_bfd != (bfd *) NULL
+      && (symbol->flags & BSF_SECTION_SYM) == 0
+      && reloc_entry->addend == 0)
+    {
+      reloc_entry->address += input_section->output_offset;
+      return bfd_reloc_ok;
+    }
+
+  /* If we're relocating, and this is a local symbol, we can handle it
+     just like HI16.  */
+  if (output_bfd != (bfd *) NULL
+      && (symbol->flags & BSF_SECTION_SYM) != 0)
+    return mips_elf_hi16_reloc (abfd, reloc_entry, symbol, data,
+				input_section, output_bfd, error_message);
+
+  abort ();
 }
 
 /* Do a R_MIPS_GPREL16 relocation.  This is a 16 bit value which must
@@ -401,13 +479,15 @@ mips_elf_gprel16_reloc (abfd,
 			symbol,
 			data,
 			input_section,
-			output_bfd)
+			output_bfd,
+			error_message)
      bfd *abfd;
      arelent *reloc_entry;
      asymbol *symbol;
      PTR data;
      asection *input_section;
      bfd *output_bfd;
+     char **error_message;
 {
   boolean relocateable;
   bfd_vma relocation;
@@ -483,9 +563,8 @@ mips_elf_gprel16_reloc (abfd,
 	    {
 	      /* Only get the error once.  */
 	      elf_gp (output_bfd) = 4;
-	      /* FIXME: How can we get the program name here?  */
-	      fprintf (stderr,
-		       "GP relative relocation when _gp not defined\n");
+	      *error_message =
+		(char *) "GP relative relocation when _gp not defined";
 	      return bfd_reloc_dangerous;
 	    }
 	}
@@ -524,7 +603,7 @@ mips_elf_gprel16_reloc (abfd,
 
   /* Make sure it fit in 16 bits.  */
   if (val >= 0x8000 && val < 0xffff8000)
-    return bfd_reloc_outofrange;
+    return bfd_reloc_overflow;
 
   return bfd_reloc_ok;
 }
@@ -633,6 +712,78 @@ bfd_mips_elf32_swap_reginfo_out (abfd, in, ex)
 		(bfd_byte *) ex->ri_gp_value);
 }
 
+/* Determine whether a symbol is global for the purposes of splitting
+   the symbol table into global symbols and local symbols.  At least
+   on Irix 5, this split must be between section symbols and all other
+   symbols.  On most ELF targets the split is between static symbols
+   and externally visible symbols.  */
+
+/*ARGSUSED*/
+static boolean
+mips_elf_sym_is_global (abfd, sym)
+     bfd *abfd;
+     asymbol *sym;
+{
+  return (sym->flags & BSF_SECTION_SYM) == 0 ? true : false;
+}
+
+/* Set the right machine number for a MIPS ELF file.  */
+
+static boolean
+mips_elf_object_p (abfd)
+     bfd *abfd;
+{
+  switch (elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH)
+    {
+    default:
+    case E_MIPS_ARCH_1:
+      /* Just use the default, which was set in elfcode.h.  */
+      break;
+
+    case E_MIPS_ARCH_2:
+      (void) bfd_default_set_arch_mach (abfd, bfd_arch_mips, 6000);
+      break;
+
+    case E_MIPS_ARCH_3:
+      (void) bfd_default_set_arch_mach (abfd, bfd_arch_mips, 4000);
+      break;
+    }
+
+  return true;
+}
+
+/* The final processing done just before writing out a MIPS ELF object
+   file.  This gets the MIPS architecture right based on the machine
+   number.  */
+
+static void
+mips_elf_final_write_processing (abfd)
+     bfd *abfd;
+{
+  unsigned long val;
+
+  switch (bfd_get_mach (abfd))
+    {
+    case 3000:
+      val = E_MIPS_ARCH_1;
+      break;
+
+    case 6000:
+      val = E_MIPS_ARCH_2;
+      break;
+
+    case 4000:
+      val = E_MIPS_ARCH_3;
+      break;
+
+    default:
+      return;
+    }
+
+  elf_elfheader (abfd)->e_flags &=~ EF_MIPS_ARCH;
+  elf_elfheader (abfd)->e_flags |= val;
+}
+
 /* Handle a MIPS specific section when reading an object file.  This
    is called when elfcode.h finds a section with an unknown type.
    FIXME: We need to handle the SHF_MIPS_GPREL flag, but I'm not sure
@@ -676,6 +827,10 @@ mips_elf_section_from_shdr (abfd, hdr, name)
 	  || hdr->sh_size != sizeof (Elf32_External_RegInfo))
 	return false;
       break;
+    case SHT_MIPS_OPTIONS:
+      if (strcmp (name, ".options") != 0)
+	return false;
+      break;
     default:
       return false;
     }
@@ -768,16 +923,25 @@ mips_elf_fake_sections (abfd, hdr, sec)
   else if (strcmp (name, ".ucode") == 0)
     hdr->sh_type = SHT_MIPS_UCODE;
   else if (strcmp (name, ".mdebug") == 0)
-    hdr->sh_type = SHT_MIPS_DEBUG;
+    {
+      hdr->sh_type = SHT_MIPS_DEBUG;
+      hdr->sh_entsize = 1;
+    }
   else if (strcmp (name, ".reginfo") == 0)
     {
       hdr->sh_type = SHT_MIPS_REGINFO;
+      hdr->sh_entsize = 1;
 
       /* Force the section size to the correct value, even if the
 	 linker thinks it is larger.  The link routine below will only
 	 write out this much data for .reginfo.  */
       hdr->sh_size = sec->_raw_size = sizeof (Elf32_External_RegInfo);
     }
+  else if (strcmp (name, ".options") == 0)
+    {
+      hdr->sh_type = SHT_MIPS_OPTIONS;
+      hdr->sh_entsize = 1;
+    }
 
   return true;
 }
@@ -853,89 +1017,469 @@ mips_elf_section_processing (abfd, hdr)
   return true;
 }
 
-/* We need to use a special link routine to handle the .reginfo
-   section.  We need to merge all the .reginfo sections together, not
-   write them all out sequentially.  */
+/* Read ECOFF debugging information from a .mdebug section into a
+   ecoff_debug_info structure.  */
 
 static boolean
-mips_elf_seclet_link (abfd, data, relocateable)
+mips_elf_read_ecoff_info (abfd, section, debug)
      bfd *abfd;
-     PTR data;
-     boolean relocateable;
+     asection *section;
+     struct ecoff_debug_info *debug;
 {
-  asection *sec;
+  HDRR *symhdr;
+  const struct ecoff_debug_swap *swap;
+  char *ext_hdr;
+
+  swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
+
+  ext_hdr = (char *) alloca (swap->external_hdr_size);
+
+  if (bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0,
+				swap->external_hdr_size)
+      == false)
+    return false;
+
+  symhdr = &debug->symbolic_header;
+  (*swap->swap_hdr_in) (abfd, ext_hdr, symhdr);
+
+  /* The symbolic header contains absolute file offsets and sizes to
+     read.  */
+#define READ(ptr, offset, count, size, type)				\
+  if (symhdr->count == 0)						\
+    debug->ptr = NULL;							\
+  else									\
+    {									\
+      debug->ptr = (type) malloc (size * symhdr->count);		\
+      if (debug->ptr == NULL)						\
+	{								\
+	  bfd_error = no_memory;					\
+	  return false;							\
+	}								\
+      if (bfd_seek (abfd, (file_ptr) symhdr->offset, SEEK_SET) != 0	\
+	  || (bfd_read (debug->ptr, size, symhdr->count,		\
+			abfd) != size * symhdr->count))			\
+	return false;							\
+    }
+
+  READ (line, cbLineOffset, cbLine, sizeof (unsigned char), unsigned char *);
+  READ (external_dnr, cbDnOffset, idnMax, swap->external_dnr_size, PTR);
+  READ (external_pdr, cbPdOffset, ipdMax, swap->external_pdr_size, PTR);
+  READ (external_sym, cbSymOffset, isymMax, swap->external_sym_size, PTR);
+  READ (external_opt, cbOptOffset, ioptMax, swap->external_opt_size, PTR);
+  READ (external_aux, cbAuxOffset, iauxMax, sizeof (union aux_ext),
+	union aux_ext *);
+  READ (ss, cbSsOffset, issMax, sizeof (char), char *);
+  READ (ssext, cbSsExtOffset, issExtMax, sizeof (char), char *);
+  READ (external_fdr, cbFdOffset, ifdMax, swap->external_fdr_size, PTR);
+  READ (external_rfd, cbRfdOffset, crfd, swap->external_rfd_size, PTR);
+  READ (external_ext, cbExtOffset, iextMax, swap->external_ext_size, PTR);
+
+  return true;
+}
+
+/* Get EXTR information for a symbol.  */
+
+static boolean
+mips_elf_get_extr (sym, esym)
+     asymbol *sym;
+     EXTR *esym;
+{
+  if (sym->flags & BSF_SECTION_SYM)
+    return false;
+
+  if (bfd_asymbol_flavour (sym) != bfd_target_elf_flavour
+      || ((elf_symbol_type *) sym)->tc_data.mips_extr == NULL)
+    {
+      esym->jmptbl = 0;
+      esym->cobol_main = 0;
+      esym->weakext = 0;
+      esym->reserved = 0;
+      esym->ifd = ifdNil;
+      /* FIXME: we can do better than this for st and sc.  */
+      esym->asym.st = stGlobal;
+      esym->asym.sc = scAbs;
+      esym->asym.reserved = 0;
+      esym->asym.index = indexNil;
+      return true;
+    }
+
+  *esym = *((elf_symbol_type *) sym)->tc_data.mips_extr;
+
+  return true;
+}
+
+/* Set the symbol index for an external symbol.  This is actually not
+   needed for ELF.  */
+
+/*ARGSUSED*/
+static void
+mips_elf_set_index (sym, indx)
+     asymbol *sym;
+     bfd_size_type indx;
+{
+}
+
+/* We need to use a special link routine to handle the .reginfo and
+   the .mdebug sections.  We need to merge all instances of these
+   sections together, not write them all out sequentially.  */
+
+static boolean
+mips_elf_final_link (abfd, info)
+     bfd *abfd;
+     struct bfd_link_info *info;
+{
+  bfd *sub;
+  size_t outsymalloc;
+  struct generic_write_global_symbol_info wginfo;
+  asection **secpp;
+  asection *o;
+  struct bfd_link_order *p;
+  asection *reginfo_sec, *mdebug_sec;
   Elf32_RegInfo reginfo;
+  struct ecoff_debug_info debug;
+  const struct ecoff_debug_swap *swap
+    = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
+  HDRR *symhdr = &debug.symbolic_header;
+
+  abfd->outsymbols = (asymbol **) NULL;
+  abfd->symcount = 0;
+  outsymalloc = 0;
+
+  /* Build the output symbol table.  This also reads in the symbols
+     for all the input BFDs, keeping them in the outsymbols field.  */
+  for (sub = info->input_bfds; sub != (bfd *) NULL; sub = sub->link_next)
+    if (! _bfd_generic_link_output_symbols (abfd, sub, info, &outsymalloc))
+      return false;
 
-  memset (&reginfo, 0, sizeof reginfo);
+  /* Accumulate the global symbols.  */
+  wginfo.output_bfd = abfd;
+  wginfo.psymalloc = &outsymalloc;
+  _bfd_generic_link_hash_traverse (_bfd_generic_hash_table (info),
+				   _bfd_generic_link_write_global_symbol,
+				   (PTR) &wginfo);
+
+  /* Remove empty sections.  Also drop the .options section, since it
+     has special semantics which I haven't bothered to figure out.
+     Also drop the .gptab sections, which also require special
+     handling which is not currently done.  Removing the .gptab
+     sections is required for Irix 5 compatibility; I don't know about
+     the other sections.  */
+  secpp = &abfd->sections;
+  while (*secpp != NULL)
+    {
+      if ((*secpp)->_raw_size == 0
+	  || strcmp ((*secpp)->name, ".options") == 0
+	  || strncmp ((*secpp)->name, ".gptab", 6) == 0)
+	{
+	  *secpp = (*secpp)->next;
+	  --abfd->section_count;
+	}
+      else
+	secpp = &(*secpp)->next;
+    }
 
-  for (sec = abfd->sections; sec != (asection *) NULL; sec = sec->next)
+  /* Go through the sections and collect the .reginfo and .mdebug
+     information.  We don't write out the information until we have
+     set the section sizes, because the ELF backend only assigns space
+     in the file once.  */
+  for (o = abfd->sections; o != (asection *) NULL; o = o->next)
     {
-      if (strcmp (sec->name, ".reginfo") == 0)
+      if (strcmp (o->name, ".reginfo") == 0)
 	{
-	  bfd_seclet_type *p;
-	  Elf32_External_RegInfo ext;
+	  memset (&reginfo, 0, sizeof reginfo);
 
 	  /* We have found the .reginfo section in the output file.
-	     Look through all the seclets comprising it and merge the
-	     information together.  */
-	  for (p = sec->seclets_head;
-	       p != (bfd_seclet_type *) NULL;
+	     Look through all the link_orders comprising it and merge
+	     the information together.  */
+	  for (p = o->link_order_head;
+	       p != (struct bfd_link_order *) NULL;
 	       p = p->next)
 	    {
-	      switch (p->type)
+	      asection *input_section;
+	      bfd *input_bfd;
+	      Elf32_External_RegInfo ext;
+	      Elf32_RegInfo sub;
+
+	      if (p->type != bfd_indirect_link_order)
+		continue;
+
+	      input_section = p->u.indirect.section;
+	      input_bfd = input_section->owner;
+	      BFD_ASSERT (input_section->_raw_size
+			  == sizeof (Elf32_External_RegInfo));
+	      if (! bfd_get_section_contents (input_bfd, input_section,
+					      (PTR) &ext,
+					      (file_ptr) 0,
+					      sizeof ext))
+		return false;
+
+	      bfd_mips_elf32_swap_reginfo_in (input_bfd, &ext, &sub);
+
+	      reginfo.ri_gprmask |= sub.ri_gprmask;
+	      reginfo.ri_cprmask[0] |= sub.ri_cprmask[0];
+	      reginfo.ri_cprmask[1] |= sub.ri_cprmask[1];
+	      reginfo.ri_cprmask[2] |= sub.ri_cprmask[2];
+	      reginfo.ri_cprmask[3] |= sub.ri_cprmask[3];
+
+	      /* ri_gp_value is set by the function
+		 mips_elf_section_processing when the section is
+		 finally written out.  */
+	    }
+
+	  /* Force the section size to the value we want.  */
+	  o->_raw_size = sizeof (Elf32_External_RegInfo);
+
+	  /* Skip this section later on.  */
+	  o->link_order_head = (struct bfd_link_order *) NULL;
+
+	  reginfo_sec = o;
+	}
+
+      if (strcmp (o->name, ".mdebug") == 0)
+	{
+	  /* We have found the .mdebug section in the output file.
+	     Look through all the link_orders comprising it and merge
+	     the information together.  */
+	  symhdr->magic = swap->sym_magic;
+	  /* FIXME: What should the version stamp be?  */
+	  symhdr->vstamp = 0;
+	  symhdr->ilineMax = 0;
+	  symhdr->cbLine = 0;
+	  symhdr->idnMax = 0;
+	  symhdr->ipdMax = 0;
+	  symhdr->isymMax = 0;
+	  symhdr->ioptMax = 0;
+	  symhdr->iauxMax = 0;
+	  symhdr->issMax = 0;
+	  symhdr->issExtMax = 0;
+	  symhdr->ifdMax = 0;
+	  symhdr->crfd = 0;
+	  symhdr->iextMax = 0;
+
+	  /* We accumulate the debugging information itself in the
+	     debug_info structure.  */
+	  debug.line = debug.line_end = NULL;
+	  debug.external_dnr = debug.external_dnr_end = NULL;
+	  debug.external_pdr = debug.external_pdr_end = NULL;
+	  debug.external_sym = debug.external_sym_end = NULL;
+	  debug.external_opt = debug.external_opt_end = NULL;
+	  debug.external_aux = debug.external_aux_end = NULL;
+	  debug.ss = debug.ss_end = NULL;
+	  debug.ssext = debug.ssext_end = NULL;
+	  debug.external_fdr = debug.external_fdr_end = NULL;
+	  debug.external_rfd = debug.external_rfd_end = NULL;
+	  debug.external_ext = debug.external_ext_end = NULL;
+
+	  for (p = o->link_order_head;
+	       p != (struct bfd_link_order *) NULL;
+	       p = p->next)
+	    {
+	      asection *input_section;
+	      bfd *input_bfd;
+	      const struct ecoff_debug_swap *input_swap;
+	      struct ecoff_debug_info input_debug;
+
+	      if (p->type != bfd_indirect_link_order)
+		continue;
+
+	      input_section = p->u.indirect.section;
+	      input_bfd = input_section->owner;
+
+	      if (bfd_get_flavour (input_bfd) != bfd_target_elf_flavour
+		  || (get_elf_backend_data (input_bfd)
+		      ->elf_backend_ecoff_debug_swap) == NULL)
 		{
-		case bfd_indirect_seclet:
-		  {
-		    asection *input_section;
-		    bfd *input_bfd;
-		    Elf32_RegInfo sub;
-
-		    input_section = p->u.indirect.section;
-		    input_bfd = input_section->owner;
-		    BFD_ASSERT (input_section->_raw_size
-				== sizeof (Elf32_External_RegInfo));
-		    if (! bfd_get_section_contents (input_bfd, input_section,
-						    (PTR) &ext,
-						    (file_ptr) 0,
-						    sizeof ext))
-		      return false;
-
-		    bfd_mips_elf32_swap_reginfo_in (input_bfd, &ext, &sub);
-
-		    reginfo.ri_gprmask |= sub.ri_gprmask;
-		    reginfo.ri_cprmask[0] |= sub.ri_cprmask[0];
-		    reginfo.ri_cprmask[1] |= sub.ri_cprmask[1];
-		    reginfo.ri_cprmask[2] |= sub.ri_cprmask[2];
-		    reginfo.ri_cprmask[3] |= sub.ri_cprmask[3];
-
-		    /* ri_gp_value is set by the function
-		       mips_elf_section_processing when the section is
-		       finally written out.  */
-		  }
-		  break;
-
-		default:
-		  break;
+		  /* I don't know what a non MIPS ELF bfd would be
+		     doing with a .mdebug section, but I don't really
+		     want to deal with it.  */
+		  continue;
 		}
+
+	      input_swap = (get_elf_backend_data (input_bfd)
+			    ->elf_backend_ecoff_debug_swap);
+
+	      BFD_ASSERT (p->size == input_section->_raw_size);
+
+	      /* The ECOFF linking code expects that we have already
+		 read in the debugging information and set up an
+		 ecoff_debug_info structure, so we do that now.  */
+	      if (! mips_elf_read_ecoff_info (input_bfd, input_section,
+					      &input_debug))
+		return false;
+
+	      if (! (bfd_ecoff_debug_accumulate
+		     (abfd, &debug, swap,
+		      input_bfd, &input_debug, input_swap,
+		      info->relocateable)))
+		return false;
+
+	      /* Loop through the external symbols.  For each one with
+		 interesting information, try to find the symbol on
+		 the symbol table of abfd and save the information in
+		 order to put it into the final external symbols.  */
+	      if (info->hash->creator == input_bfd->xvec)
+		{
+		  char *eraw_src;
+		  char *eraw_end;
+
+		  eraw_src = input_debug.external_ext;
+		  eraw_end = (eraw_src
+			      + (input_debug.symbolic_header.iextMax
+				 * input_swap->external_ext_size));
+		  for (;
+		       eraw_src < eraw_end;
+		       eraw_src += input_swap->external_ext_size)
+		    {
+		      EXTR ext;
+		      const char *name;
+		      struct generic_link_hash_entry *h;
+		      elf_symbol_type *elf_sym;
+
+		      (*input_swap->swap_ext_in) (input_bfd, (PTR) eraw_src,
+						  &ext);
+		      if (ext.asym.sc == scNil
+			  || ext.asym.sc == scUndefined
+			  || ext.asym.sc == scSUndefined)
+			continue;
+
+		      name = input_debug.ssext + ext.asym.iss;
+		      h = ((struct generic_link_hash_entry *)
+			   bfd_link_hash_lookup (info->hash, name, false,
+						 false, true));
+		      if (h == (struct generic_link_hash_entry *) NULL
+			  || h->sym == (asymbol *) NULL)
+			continue;
+
+		      elf_sym = (elf_symbol_type *) (h->sym);
+
+		      if (elf_sym->tc_data.mips_extr != NULL)
+			continue;
+
+		      elf_sym->tc_data.mips_extr =
+			(EXTR *) bfd_alloc (abfd, sizeof (EXTR));
+
+		      ext.ifd += input_debug.ifdbase;
+		      *elf_sym->tc_data.mips_extr = ext;
+		    }
+		}
+
+	      /* Free up the information we just read.  */
+	      free (input_debug.line);
+	      free (input_debug.external_dnr);
+	      free (input_debug.external_pdr);
+	      free (input_debug.external_sym);
+	      free (input_debug.external_opt);
+	      free (input_debug.external_aux);
+	      free (input_debug.ss);
+	      free (input_debug.ssext);
+	      free (input_debug.external_fdr);
+	      free (input_debug.external_rfd);
+	      free (input_debug.external_ext);
 	    }
 
-	  /* Write out the information we have accumulated.  */
-	  bfd_mips_elf32_swap_reginfo_out (abfd, &reginfo, &ext);
-	  if (! bfd_set_section_contents (abfd, sec, (PTR) &ext,
-					  (file_ptr) 0, sizeof ext))
+	  /* Build the external symbol information.  */
+	  if (! bfd_ecoff_debug_externals (abfd, &debug, swap,
+					   info->relocateable,
+					   mips_elf_get_extr,
+					   mips_elf_set_index))
 	    return false;
 
-	  /* Force the section size to the value we want.  */
-	  sec->_raw_size = sizeof (Elf32_External_RegInfo);
+	  /* Set the size of the section.  */
+	  o->_raw_size = bfd_ecoff_debug_size (abfd, &debug, swap);
+
+	  /* Skip this section later on.  */
+	  o->link_order_head = (struct bfd_link_order *) NULL;
+
+	  mdebug_sec = o;
+	}
+    }
+
+  if (info->relocateable)
+    {
+      /* Allocate space for the output relocs for each section.  */
+      for (o = abfd->sections;
+	   o != (asection *) NULL;
+	   o = o->next)
+	{
+	  o->reloc_count = 0;
+	  for (p = o->link_order_head;
+	       p != (struct bfd_link_order *) NULL;
+	       p = p->next)
+	    {
+	      if (p->type == bfd_indirect_link_order)
+		{
+		  asection *input_section;
+		  bfd *input_bfd;
+		  bfd_size_type relsize;
+		  arelent **relocs;
+		  bfd_size_type reloc_count;
+
+		  input_section = p->u.indirect.section;
+		  input_bfd = input_section->owner;
+		  relsize = bfd_get_reloc_upper_bound (input_bfd,
+						       input_section);
+		  relocs = (arelent **) bfd_xmalloc (relsize);
+		  reloc_count =
+		    bfd_canonicalize_reloc (input_bfd, input_section,
+					    relocs,
+					    bfd_get_outsymbols (input_bfd));
+		  BFD_ASSERT (reloc_count == input_section->reloc_count);
+		  o->reloc_count += reloc_count;
+		  free (relocs);
+		}
+	    }
+	  if (o->reloc_count > 0)
+	    {
+	      o->orelocation = ((arelent **)
+				bfd_alloc (abfd,
+					   (o->reloc_count
+					    * sizeof (arelent *))));
+	      /* Reset the count so that it can be used as an index
+		 when putting in the output relocs.  */
+	      o->reloc_count = 0;
+	    }
+	}
+    }
 
-	  /* Force bfd_generic_seclet_link to ignore this section.  */
-	  sec->seclets_head = (bfd_seclet_type *) NULL;
+  /* Write out the information we have accumulated.  */
+  if (reginfo_sec != (asection *) NULL)
+    {
+      Elf32_External_RegInfo ext;
+
+      bfd_mips_elf32_swap_reginfo_out (abfd, &reginfo, &ext);
+      if (! bfd_set_section_contents (abfd, reginfo_sec, (PTR) &ext,
+				      (file_ptr) 0, sizeof ext))
+	return false;
+    }
 
-	  break;
+  if (mdebug_sec != (asection *) NULL)
+    {
+      if (! abfd->output_has_begun)
+	{
+	  /* Force the section to be given a file position.  */
+	  bfd_set_section_contents (abfd, mdebug_sec, (PTR) NULL,
+				    (file_ptr) 0, (bfd_size_type) 0);
+	  BFD_ASSERT (abfd->output_has_begun);
 	}
+      if (! bfd_ecoff_write_debug (abfd, &debug, swap, mdebug_sec->filepos))
+	return false;
     }
 
-  return bfd_generic_seclet_link (abfd, data, relocateable);
+  /* Handle all the link order information for the sections.  */
+  for (o = abfd->sections;
+       o != (asection *) NULL;
+       o = o->next)
+    {
+      for (p = o->link_order_head;
+	   p != (struct bfd_link_order *) NULL;
+	   p = p->next)
+	{
+	  if (! _bfd_default_link_order (abfd, info, o, p))
+	    return false;
+	}
+    }
+
+  return true;
 }
 
 /* MIPS ELF uses two common sections.  One is the usual one, and the
@@ -947,6 +1491,13 @@ static asection mips_elf_scom_section;
 static asymbol mips_elf_scom_symbol;
 static asymbol *mips_elf_scom_symbol_ptr;
 
+/* MIPS ELF also uses an acommon section, which represents an
+   allocated common symbol which may be overridden by a 	
+   definition in a shared library.  */
+static asection mips_elf_acom_section;
+static asymbol mips_elf_acom_symbol;
+static asymbol *mips_elf_acom_symbol_ptr;
+
 /* Handle the special MIPS section numbers that a symbol may use.  */
 
 static void
@@ -960,9 +1511,25 @@ mips_elf_symbol_processing (abfd, asym)
   switch (elfsym->internal_elf_sym.st_shndx)
     {
     case SHN_MIPS_ACOMMON:
-      /* FIXME: I don't really understand just what this section
-	 means or when it would be used.  */
-      abort ();
+      /* This section is used in a dynamically linked executable file.
+	 It is an allocated common section.  The dynamic linker can
+	 either resolve these symbols to something in a shared
+	 library, or it can just leave them here.  For our purposes,
+	 we can consider these symbols to be in a new section.  */
+      if (mips_elf_acom_section.name == NULL)
+	{
+	  /* Initialize the acommon section.  */
+	  mips_elf_acom_section.name = ".acommon";
+	  mips_elf_acom_section.flags = SEC_NO_FLAGS;
+	  mips_elf_acom_section.output_section = &mips_elf_acom_section;
+	  mips_elf_acom_section.symbol = &mips_elf_acom_symbol;
+	  mips_elf_acom_section.symbol_ptr_ptr = &mips_elf_acom_symbol_ptr;
+	  mips_elf_acom_symbol.name = ".acommon";
+	  mips_elf_acom_symbol.flags = BSF_SECTION_SYM;
+	  mips_elf_acom_symbol.section = &mips_elf_acom_section;
+	  mips_elf_acom_symbol_ptr = &mips_elf_acom_symbol;
+	}
+      asym->section = &mips_elf_acom_section;
       break;
 
     case SHN_COMMON:
@@ -995,21 +1562,64 @@ mips_elf_symbol_processing (abfd, asym)
     }
 }
 
+/* ECOFF swapping routines.  These are used when dealing with the
+   .mdebug section, which is in the ECOFF debugging format.  */
+static const struct ecoff_debug_swap mips_elf_ecoff_debug_swap =
+{
+  /* Symbol table magic number.  */
+  magicSym,
+  /* Alignment of debugging information.  E.g., 4.  */
+  4,
+  /* Sizes of external symbolic information.  */
+  sizeof (struct hdr_ext),
+  sizeof (struct dnr_ext),
+  sizeof (struct pdr_ext),
+  sizeof (struct sym_ext),
+  sizeof (struct opt_ext),
+  sizeof (struct fdr_ext),
+  sizeof (struct rfd_ext),
+  sizeof (struct ext_ext),
+  /* Functions to swap in external symbolic data.  */
+  ecoff_swap_hdr_in,
+  ecoff_swap_dnr_in,
+  ecoff_swap_pdr_in,
+  ecoff_swap_sym_in,
+  ecoff_swap_opt_in,
+  ecoff_swap_fdr_in,
+  ecoff_swap_rfd_in,
+  ecoff_swap_ext_in,
+  /* Functions to swap out external symbolic data.  */
+  ecoff_swap_hdr_out,
+  ecoff_swap_dnr_out,
+  ecoff_swap_pdr_out,
+  ecoff_swap_sym_out,
+  ecoff_swap_opt_out,
+  ecoff_swap_fdr_out,
+  ecoff_swap_rfd_out,
+  ecoff_swap_ext_out
+};
+
 #define TARGET_LITTLE_SYM		bfd_elf32_littlemips_vec
 #define TARGET_LITTLE_NAME		"elf32-littlemips"
 #define TARGET_BIG_SYM			bfd_elf32_bigmips_vec
 #define TARGET_BIG_NAME			"elf32-bigmips"
 #define ELF_ARCH			bfd_arch_mips
+#define ELF_MACHINE_CODE		EM_MIPS
 #define ELF_MAXPAGESIZE			0x10000
 #define elf_info_to_howto		0
 #define elf_info_to_howto_rel		mips_info_to_howto_rel
+#define elf_backend_sym_is_global	mips_elf_sym_is_global
+#define elf_backend_object_p		mips_elf_object_p
 #define elf_backend_section_from_shdr	mips_elf_section_from_shdr
 #define elf_backend_fake_sections	mips_elf_fake_sections
 #define elf_backend_section_from_bfd_section \
 					mips_elf_section_from_bfd_section
 #define elf_backend_section_processing	mips_elf_section_processing
 #define elf_backend_symbol_processing	mips_elf_symbol_processing
+#define elf_backend_final_write_processing \
+					mips_elf_final_write_processing
+#define elf_backend_ecoff_debug_swap	&mips_elf_ecoff_debug_swap
 
-#define bfd_elf32_bfd_seclet_link	mips_elf_seclet_link
+#define bfd_elf32_bfd_final_link	mips_elf_final_link
 
 #include "elf32-target.h"