sdcc-3.9.0 fork implementing GNU assembler syntax

This fork aims to provide better support for stm8-binutils

1 files changed, 905 insertions, 0 deletions

diff --git a/support/sdbinutils/binutils/coffgrok.c b/support/sdbinutils/binutils/coffgrok.c
new file mode 100644
index 0000000..df2d063
--- /dev/null
+++ b/support/sdbinutils/binutils/coffgrok.c
@@ -0,0 +1,905 @@
+/* coffgrok.c
+   Copyright (C) 1994-2018 Free Software Foundation, Inc.
+
+   This file is part of GNU Binutils.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+   MA 02110-1301, USA.  */
+
+
+/* Written by Steve Chamberlain (sac@cygnus.com)
+
+   This module reads a coff file and builds a really simple type tree
+   which can be read by other programs.  The first application is a
+   coff->sysroff converter.  It can be tested with coffdump.c.  */
+
+#include "sysdep.h"
+#include "bfd.h"
+#include "libiberty.h"
+#include "coff/internal.h"
+#include "../bfd/libcoff.h"
+#include "bucomm.h"
+#include "coffgrok.h"
+
+static int                      lofile = 1;
+
+static struct coff_scope *      top_scope;
+static struct coff_scope *      file_scope;
+static struct coff_ofile *      ofile;
+static struct coff_symbol *     last_function_symbol;
+static struct coff_type *       last_function_type;
+static struct coff_type *       last_struct;
+static struct coff_type *       last_enum;
+static struct coff_sfile *      cur_sfile;
+static struct coff_symbol **    tindex;
+static asymbol **               syms;
+static long                     symcount;
+static struct coff_ptr_struct * rawsyms;
+static unsigned int             rawcount;
+static bfd *                    abfd;
+
+#define N(x) ((x)->_n._n_nptr[1])
+
+#define PTR_SIZE	4
+#define SHORT_SIZE	2
+#define INT_SIZE	4
+#define LONG_SIZE	4
+#define FLOAT_SIZE	4
+#define DOUBLE_SIZE	8
+
+#define INDEXOF(p)  ((struct coff_ptr_struct *)(p)-(rawsyms))
+
+
+static struct coff_scope *
+empty_scope (void)
+{
+  return (struct coff_scope *) (xcalloc (sizeof (struct coff_scope), 1));
+}
+
+static struct coff_symbol *
+empty_symbol (void)
+{
+  return (struct coff_symbol *) (xcalloc (sizeof (struct coff_symbol), 1));
+}
+
+static void
+push_scope (int slink)
+{
+  struct coff_scope *n = empty_scope ();
+
+  if (slink)
+    {
+      if (top_scope)
+	{
+	  if (top_scope->list_tail)
+	    {
+	      top_scope->list_tail->next = n;
+	    }
+	  else
+	    {
+	      top_scope->list_head = n;
+	    }
+	  top_scope->list_tail = n;
+	}
+    }
+  n->parent = top_scope;
+
+  top_scope = n;
+}
+
+static void
+pop_scope (void)
+{
+  /* PR 17512: file: 809933ac.  */
+  if (top_scope == NULL)
+    fatal (_("Out of context scope change encountered"));
+  top_scope = top_scope->parent;
+}
+
+static void
+do_sections_p1 (struct coff_ofile *head)
+{
+  asection *section;
+  int idx;
+  struct coff_section *all = (struct coff_section *) (xcalloc (abfd->section_count + 1,
+					     sizeof (struct coff_section)));
+  head->nsections = abfd->section_count + 1;
+  head->sections = all;
+
+  for (idx = 0, section = abfd->sections; section; section = section->next, idx++)
+    {
+      long relsize;
+      unsigned int i = section->target_index;
+      arelent **relpp;
+      long relcount;
+
+      /* PR 17512: file: 2d6effca.  */
+      if (i > abfd->section_count)
+	fatal (_("Invalid section target index: %u"), i);
+
+      relsize = bfd_get_reloc_upper_bound (abfd, section);
+      if (relsize < 0)
+	bfd_fatal (bfd_get_filename (abfd));
+      if (relsize == 0)
+	continue;
+      relpp = (arelent **) xmalloc (relsize);
+      relcount = bfd_canonicalize_reloc (abfd, section, relpp, syms);
+      if (relcount < 0)
+	bfd_fatal (bfd_get_filename (abfd));
+
+      head->sections[i].name = (char *) (section->name);
+      head->sections[i].code = section->flags & SEC_CODE;
+      head->sections[i].data = section->flags & SEC_DATA;
+      if (strcmp (section->name, ".bss") == 0)
+	head->sections[i].data = 1;
+      head->sections[i].address = section->lma;
+      head->sections[i].size = bfd_get_section_size (section);
+      head->sections[i].number = idx;
+      head->sections[i].nrelocs = section->reloc_count;
+      head->sections[i].relocs =
+	(struct coff_reloc *) (xcalloc (section->reloc_count,
+					sizeof (struct coff_reloc)));
+      head->sections[i].bfd_section = section;
+    }
+  head->sections[0].name = "ABSOLUTE";
+  head->sections[0].code = 0;
+  head->sections[0].data = 0;
+  head->sections[0].address = 0;
+  head->sections[0].size = 0;
+  head->sections[0].number = 0;
+}
+
+static void
+do_sections_p2 (struct coff_ofile *head)
+{
+  asection *section;
+
+  for (section = abfd->sections; section; section = section->next)
+    {
+      unsigned int j;
+
+      /* PR 17512: file: 7c1a36e8.
+	 A corrupt COFF binary might have a reloc count but no relocs.
+	 Handle this here.  */
+      if (section->relocation == NULL)
+	continue;
+
+      for (j = 0; j < section->reloc_count; j++)
+	{
+	  unsigned int idx;
+	  int i = section->target_index;
+	  struct coff_reloc *r;
+	  arelent *sr = section->relocation + j;
+
+	  if (i > head->nsections)
+	    fatal (_("Invalid section target index: %d"), i);
+	  /* PR 17512: file: db850ff4.  */
+	  if (j >= head->sections[i].nrelocs)
+	    fatal (_("Target section has insufficient relocs"));
+	  r = head->sections[i].relocs + j;
+	  r->offset = sr->address;
+	  r->addend = sr->addend;
+	  idx = ((coff_symbol_type *) (sr->sym_ptr_ptr[0]))->native - rawsyms;
+	  if (idx >= rawcount)
+	    {
+	      if (rawcount == 0)
+		fatal (_("Symbol index %u encountered when there are no symbols"), idx);
+	      non_fatal (_("Invalid symbol index %u encountered"), idx);
+	      idx = 0;
+	    }
+	  r->symbol = tindex[idx];
+	}
+    }
+}
+
+static struct coff_where *
+do_where (unsigned int i)
+{
+  struct internal_syment *sym;
+  struct coff_where *where =
+    (struct coff_where *) (xmalloc (sizeof (struct coff_where)));
+
+  if (i >= rawcount)
+    fatal ("Invalid symbol index: %d\n", i);
+
+  sym = &rawsyms[i].u.syment;
+  where->offset = sym->n_value;
+
+  if (sym->n_scnum == -1)
+    sym->n_scnum = 0;
+
+  switch (sym->n_sclass)
+    {
+    case C_FIELD:
+      where->where = coff_where_member_of_struct;
+      where->offset = sym->n_value / 8;
+      where->bitoffset = sym->n_value % 8;
+      where->bitsize = rawsyms[i + 1].u.auxent.x_sym.x_misc.x_lnsz.x_size;
+      break;
+    case C_MOE:
+      where->where = coff_where_member_of_enum;
+      break;
+    case C_MOS:
+    case C_MOU:
+      where->where = coff_where_member_of_struct;
+      break;
+    case C_AUTO:
+    case C_ARG:
+      where->where = coff_where_stack;
+      break;
+    case C_EXT:
+    case C_STAT:
+    case C_EXTDEF:
+    case C_LABEL:
+      where->where = coff_where_memory;
+      /* PR 17512: file: 07a37c40.  */
+      /* PR 17512: file: 0c2eb101.  */
+      if (sym->n_scnum >= ofile->nsections || sym->n_scnum < 0)
+	{
+	  non_fatal (_("Invalid section number (%d) encountered"),
+		     sym->n_scnum);
+	  where->section = ofile->sections;
+	}
+      else
+	where->section = &ofile->sections[sym->n_scnum];
+      break;
+    case C_REG:
+    case C_REGPARM:
+      where->where = coff_where_register;
+      break;
+    case C_ENTAG:
+      where->where = coff_where_entag;
+      break;
+    case C_STRTAG:
+    case C_UNTAG:
+      where->where = coff_where_strtag;
+      break;
+    case C_TPDEF:
+      where->where = coff_where_typedef;
+      break;
+    default:
+      fatal (_("Unrecognized symbol class: %d"), sym->n_sclass);
+      break;
+    }
+  return where;
+}
+
+static struct coff_line *
+do_lines (int i, char *name ATTRIBUTE_UNUSED)
+{
+  struct coff_line *res = (struct coff_line *) xcalloc (sizeof (struct coff_line), 1);
+  asection *s;
+  unsigned int l;
+
+  /* Find out if this function has any line numbers in the table.  */
+  for (s = abfd->sections; s; s = s->next)
+    {
+      /* PR 17512: file: 07a37c40.
+	 A corrupt COFF binary can have a linenumber count in the header
+	 but no line number table.  This should be reported elsewhere, but
+	 do not rely upon this.  */
+      if (s->lineno == NULL)
+	continue;
+
+      for (l = 0; l < s->lineno_count; l++)
+	{
+	  if (s->lineno[l].line_number == 0)
+	    {
+	      if (rawsyms + i == ((coff_symbol_type *) (&(s->lineno[l].u.sym[0])))->native)
+		{
+		  /* These lines are for this function - so count them and stick them on.  */
+		  int c = 0;
+		  /* Find the linenumber of the top of the function, since coff linenumbers
+		     are relative to the start of the function.  */
+		  int start_line = rawsyms[i + 3].u.auxent.x_sym.x_misc.x_lnsz.x_lnno;
+
+		  l++;
+		  for (c = 0;
+		       /* PR 17512: file: c2825452.  */
+		       l + c + 1 < s->lineno_count
+			 && s->lineno[l + c + 1].line_number;
+		       c++)
+		    ;
+
+		  /* Add two extra records, one for the prologue and one for the epilogue.  */
+		  c += 1;
+		  res->nlines = c;
+		  res->lines = (int *) (xcalloc (sizeof (int), c));
+		  res->addresses = (int *) (xcalloc (sizeof (int), c));
+		  res->lines[0] = start_line;
+		  res->addresses[0] = rawsyms[i].u.syment.n_value - s->vma;
+		  for (c = 0;
+		       /* PR 17512: file: c2825452.  */
+		       l + c + 1 < s->lineno_count
+			 && s->lineno[l + c + 1].line_number;
+		       c++)
+		    {
+		      res->lines[c + 1] = s->lineno[l + c].line_number + start_line - 1;
+		      res->addresses[c + 1] = s->lineno[l + c].u.offset;
+		    }
+		  return res;
+		}
+	    }
+	}
+    }
+  return res;
+}
+
+static struct coff_type *
+do_type (unsigned int i)
+{
+  struct internal_syment *sym;
+  union internal_auxent *aux;
+  struct coff_type *res = (struct coff_type *) xmalloc (sizeof (struct coff_type));
+  int type;
+  int which_dt = 0;
+  int dimind = 0;
+
+  if (i >= rawcount)
+    fatal (_("Type entry %u does not have enough symbolic information"), i);
+
+  if (!rawsyms[i].is_sym)
+    fatal (_("Type entry %u does not refer to a symbol"), i);
+  sym = &rawsyms[i].u.syment;
+
+  if (sym->n_numaux == 0 || i >= rawcount -1 || rawsyms[i + 1].is_sym)
+    aux = NULL;
+  else
+    aux = &rawsyms[i + 1].u.auxent;
+
+  type = sym->n_type;
+
+  res->type = coff_basic_type;
+  res->u.basic = type & 0xf;
+
+  switch (type & 0xf)
+    {
+    case T_NULL:
+    case T_VOID:
+      if (sym->n_numaux && sym->n_sclass == C_STAT)
+	{
+	  /* This is probably a section definition.  */
+	  res->type = coff_secdef_type;
+	  if (aux == NULL)
+	    fatal (_("Section definition needs a section length"));
+	  res->size = aux->x_scn.x_scnlen;
+
+	  /* PR 17512: file: 081c955d.
+	     Fill in the asecdef structure as well.  */
+	  res->u.asecdef.address = 0;
+	  res->u.asecdef.size = 0;
+	}
+      else
+	{
+	  if (type == 0)
+	    {
+	      /* Don't know what this is, let's make it a simple int.  */
+	      res->size = INT_SIZE;
+	      res->u.basic = T_UINT;
+	    }
+	  else
+	    {
+	      /* Else it could be a function or pointer to void.  */
+	      res->size = 0;
+	    }
+	}
+      break;
+
+    case T_UCHAR:
+    case T_CHAR:
+      res->size = 1;
+      break;
+    case T_USHORT:
+    case T_SHORT:
+      res->size = SHORT_SIZE;
+      break;
+    case T_UINT:
+    case T_INT:
+      res->size = INT_SIZE;
+      break;
+    case T_ULONG:
+    case T_LONG:
+      res->size = LONG_SIZE;
+      break;
+    case T_FLOAT:
+      res->size = FLOAT_SIZE;
+      break;
+    case T_DOUBLE:
+      res->size = DOUBLE_SIZE;
+      break;
+    case T_STRUCT:
+    case T_UNION:
+      if (sym->n_numaux)
+	{
+	  if (aux == NULL)
+	    fatal (_("Aggregate definition needs auxillary information"));
+
+	  if (aux->x_sym.x_tagndx.p)
+	    {
+	      unsigned int idx;
+
+	      /* PR 17512: file: e72f3988.  */
+	      if (aux->x_sym.x_tagndx.l < 0 || aux->x_sym.x_tagndx.p < rawsyms)
+		{
+		  non_fatal (_("Invalid tag index %#lx encountered"), aux->x_sym.x_tagndx.l);
+		  idx = 0;
+		}
+	      else
+		idx = INDEXOF (aux->x_sym.x_tagndx.p);
+
+	      if (idx >= rawcount)
+		{
+		  if (rawcount == 0)
+		    fatal (_("Symbol index %u encountered when there are no symbols"), idx);
+		  non_fatal (_("Invalid symbol index %u encountered"), idx);
+		  idx = 0;
+		}
+
+	      /* Referring to a struct defined elsewhere.  */
+	      res->type = coff_structref_type;
+	      res->u.astructref.ref = tindex[idx];
+	      res->size = res->u.astructref.ref ?
+		res->u.astructref.ref->type->size : 0;
+	    }
+	  else
+	    {
+	      /* A definition of a struct.  */
+	      last_struct = res;
+	      res->type = coff_structdef_type;
+	      res->u.astructdef.elements = empty_scope ();
+	      res->u.astructdef.idx = 0;
+	      res->u.astructdef.isstruct = (type & 0xf) == T_STRUCT;
+	      res->size = aux->x_sym.x_misc.x_lnsz.x_size;
+	    }
+	}
+      else
+	{
+	  /* No auxents - it's anonymous.  */
+	  res->type = coff_structref_type;
+	  res->u.astructref.ref = 0;
+	  res->size = 0;
+	}
+      break;
+    case T_ENUM:
+      if (aux == NULL)
+	fatal (_("Enum definition needs auxillary information"));
+      if (aux->x_sym.x_tagndx.p)
+	{
+	  unsigned int idx = INDEXOF (aux->x_sym.x_tagndx.p);
+
+	  /* PR 17512: file: 1ef037c7.  */
+	  if (idx >= rawcount)
+	    fatal (_("Invalid enum symbol index %u encountered"), idx);
+	  /* Referring to a enum defined elsewhere.  */
+	  res->type = coff_enumref_type;
+	  res->u.aenumref.ref = tindex[idx];
+	  /* PR 17512: file: b85b67e8.  */
+	  if (res->u.aenumref.ref)
+	    res->size = res->u.aenumref.ref->type->size;
+	  else
+	    res->size = 0;
+	}
+      else
+	{
+	  /* A definition of an enum.  */
+	  last_enum = res;
+	  res->type = coff_enumdef_type;
+	  res->u.aenumdef.elements = empty_scope ();
+	  res->size = aux->x_sym.x_misc.x_lnsz.x_size;
+	}
+      break;
+    case T_MOE:
+      break;
+    }
+
+  for (which_dt = 5; which_dt >= 0; which_dt--)
+    {
+      switch ((type >> ((which_dt * 2) + 4)) & 0x3)
+	{
+	case 0:
+	  break;
+	case DT_ARY:
+	  {
+	    struct coff_type *ptr = ((struct coff_type *)
+				     xmalloc (sizeof (struct coff_type)));
+	    int els;
+
+	    if (aux == NULL)
+	      fatal (_("Array definition needs auxillary information"));
+	    els = (dimind < DIMNUM
+		   ? aux->x_sym.x_fcnary.x_ary.x_dimen[dimind]
+		   : 0);
+
+	    ++dimind;
+	    ptr->type = coff_array_type;
+	    /* PR 17512: file: ae1971e2.
+	       Check for integer overflow.  */
+	    {
+	      long long a, z;
+	      a = els;
+	      z = res->size;
+	      a *= z;
+	      ptr->size = (int) a;
+	      if (ptr->size != a)
+		non_fatal (_("Out of range sum for els (%#x) * size (%#x)"), els, res->size);
+	    }
+	    ptr->u.array.dim = els;
+	    ptr->u.array.array_of = res;
+	    res = ptr;
+	    break;
+	  }
+	case DT_PTR:
+	  {
+	    struct coff_type *ptr =
+	      (struct coff_type *) xmalloc (sizeof (struct coff_type));
+
+	    ptr->size = PTR_SIZE;
+	    ptr->type = coff_pointer_type;
+	    ptr->u.pointer.points_to = res;
+	    res = ptr;
+	    break;
+	  }
+	case DT_FCN:
+	  {
+	    struct coff_type *ptr
+	      = (struct coff_type *) xmalloc (sizeof (struct coff_type));
+
+	    ptr->size = 0;
+	    ptr->type = coff_function_type;
+	    ptr->u.function.function_returns = res;
+	    ptr->u.function.parameters = empty_scope ();
+	    ptr->u.function.lines = do_lines (i, N(sym));
+	    ptr->u.function.code = 0;
+	    last_function_type = ptr;
+	    res = ptr;
+	    break;
+	  }
+	}
+    }
+  return res;
+}
+
+static struct coff_visible *
+do_visible (int i)
+{
+  struct internal_syment *sym = &rawsyms[i].u.syment;
+  struct coff_visible *visible =
+    (struct coff_visible *) (xmalloc (sizeof (struct coff_visible)));
+  enum coff_vis_type t;
+
+  switch (sym->n_sclass)
+    {
+    case C_MOS:
+    case C_MOU:
+    case C_FIELD:
+      t = coff_vis_member_of_struct;
+      break;
+    case C_MOE:
+      t = coff_vis_member_of_enum;
+      break;
+    case C_REGPARM:
+      t = coff_vis_regparam;
+      break;
+    case C_REG:
+      t = coff_vis_register;
+      break;
+    case C_STRTAG:
+    case C_UNTAG:
+    case C_ENTAG:
+    case C_TPDEF:
+      t = coff_vis_tag;
+      break;
+    case C_AUTOARG:
+    case C_ARG:
+      t = coff_vis_autoparam;
+      break;
+    case C_AUTO:
+      t = coff_vis_auto;
+      break;
+    case C_LABEL:
+    case C_STAT:
+      t = coff_vis_int_def;
+      break;
+    case C_EXT:
+      if (sym->n_scnum == N_UNDEF)
+	{
+	  if (sym->n_value)
+	    t = coff_vis_common;
+	  else
+	    t = coff_vis_ext_ref;
+	}
+      else
+	t = coff_vis_ext_def;
+      break;
+    default:
+      fatal (_("Unrecognised symbol class: %d"), sym->n_sclass);
+      break;
+    }
+  visible->type = t;
+  return visible;
+}
+
+/* Define a symbol and attach to block B.  */
+
+static int
+do_define (unsigned int i, struct coff_scope *b)
+{
+  static int symbol_index;
+  struct internal_syment *sym;
+  struct coff_symbol *s = empty_symbol ();
+
+  if (b == NULL)
+    fatal (_("ICE: do_define called without a block"));
+  if (i >= rawcount)
+    fatal (_("Out of range symbol index: %u"), i);
+
+  sym = &rawsyms[i].u.syment;
+  s->number = ++symbol_index;
+  s->name = N(sym);
+  s->sfile = cur_sfile;
+  /* Glue onto the ofile list.  */
+  if (lofile >= 0)
+    {
+      if (ofile->symbol_list_tail)
+	ofile->symbol_list_tail->next_in_ofile_list = s;
+      else
+	ofile->symbol_list_head = s;
+      ofile->symbol_list_tail = s;
+      /* And the block list.  */
+    }
+  if (b->vars_tail)
+    b->vars_tail->next = s;
+  else
+    b->vars_head = s;
+
+  b->vars_tail = s;
+  b->nvars++;
+  s->type = do_type (i);
+  s->where = do_where (i);
+  s->visible = do_visible (i);
+
+  tindex[i] = s;
+
+  /* We remember the lowest address in each section for each source file.  */
+  if (s->where->where == coff_where_memory
+      && s->type->type == coff_secdef_type)
+    {
+      struct coff_isection *is;
+
+      /* PR 17512: file: 4676c97f.  */
+      if (cur_sfile == NULL)
+	non_fatal (_("Section referenced before any file is defined"));
+      else
+	{
+	  is = cur_sfile->section + s->where->section->number;
+
+	  if (!is->init)
+	    {
+	      is->low = s->where->offset;
+	      /* PR 17512: file: 37e7a80d.
+		 Check for integer overflow computing low + size.  */
+	      {
+		long long a, z;
+
+		a = s->where->offset;
+		z = s->type->size;
+		a += z;
+		is->high = (int) a;
+		if (a != is->high)
+		  non_fatal (_("Out of range sum for offset (%#x) + size (%#x)"),
+			     is->low, s->type->size);
+	      }
+	      /* PR 17512: file: 37e7a80d.  */
+	      if (is->high < s->where->offset)
+		fatal (_("Out of range type size: %u"), s->type->size);
+	      is->init = 1;
+	      is->parent = s->where->section;
+	    }
+	}
+    }
+
+  if (s->type->type == coff_function_type)
+    last_function_symbol = s;
+
+  return i + sym->n_numaux + 1;
+}
+
+static struct coff_ofile *
+doit (void)
+{
+  unsigned int i;
+  bfd_boolean infile = FALSE;
+  struct coff_ofile *head =
+    (struct coff_ofile *) xmalloc (sizeof (struct coff_ofile));
+
+  ofile = head;
+  head->source_head = 0;
+  head->source_tail = 0;
+  head->nsources = 0;
+  head->symbol_list_tail = 0;
+  head->symbol_list_head = 0;
+  do_sections_p1 (head);
+  push_scope (1);
+
+  for (i = 0; i < rawcount;)
+    {
+      struct internal_syment *sym = &rawsyms[i].u.syment;
+
+      switch (sym->n_sclass)
+	{
+	case C_FILE:
+	  {
+	    /* New source file announced.  */
+	    struct coff_sfile *n =
+	      (struct coff_sfile *) xmalloc (sizeof (struct coff_sfile));
+
+	    n->section = (struct coff_isection *) xcalloc (sizeof (struct coff_isection), abfd->section_count + 1);
+	    cur_sfile = n;
+	    n->name = N(sym);
+	    n->next = 0;
+
+	    if (infile)
+	      pop_scope ();
+	    else
+	      infile = TRUE;
+
+	    push_scope (1);
+	    file_scope = n->scope = top_scope;
+
+	    if (head->source_tail)
+	      head->source_tail->next = n;
+	    else
+	      head->source_head = n;
+	    head->source_tail = n;
+	    head->nsources++;
+	    i += sym->n_numaux + 1;
+	  }
+	  break;
+	case C_FCN:
+	  {
+	    char *name = N(sym);
+
+	    if (name[1] == 'b')
+	      {
+		/* Function start.  */
+		push_scope (0);
+		/* PR 17512: file: 0ef7fbaf.  */
+		if (last_function_type)
+		  last_function_type->u.function.code = top_scope;
+		/* PR 17512: file: 22908266.  */
+		if (sym->n_scnum < ofile->nsections && sym->n_scnum >= 0)
+		  top_scope->sec = ofile->sections + sym->n_scnum;
+		else
+		  top_scope->sec = NULL;
+		top_scope->offset = sym->n_value;
+	      }
+	    else
+	      {
+		/* PR 17512: file: e92e42e1.  */
+		if (top_scope == NULL)
+		  fatal (_("Function start encountered without a top level scope."));
+		top_scope->size = sym->n_value - top_scope->offset + 1;
+		pop_scope ();
+	      }
+	    i += sym->n_numaux + 1;
+	  }
+	  break;
+
+	case C_BLOCK:
+	  {
+	    char *name = N(sym);
+
+	    if (name[1] == 'b')
+	      {
+		/* Block start.  */
+		push_scope (1);
+		/* PR 17512: file: af7e8e83.  */
+		if (sym->n_scnum < ofile->nsections && sym->n_scnum >= 0)
+		  top_scope->sec = ofile->sections + sym->n_scnum;
+		else
+		  top_scope->sec = NULL;
+		top_scope->offset = sym->n_value;
+	      }
+	    else
+	      {
+		if (top_scope == NULL)
+		  fatal (_("Block start encountered without a scope for it."));
+		top_scope->size = sym->n_value - top_scope->offset + 1;
+		pop_scope ();
+	      }
+	    i += sym->n_numaux + 1;
+	  }
+	  break;
+	case C_REGPARM:
+	case C_ARG:
+	  if (last_function_symbol == NULL)
+	    fatal (_("Function arguments encountered without a function definition"));
+	  i = do_define (i, last_function_symbol->type->u.function.parameters);
+	  break;
+	case C_MOS:
+	case C_MOU:
+	case C_FIELD:
+	  /* PR 17512: file: 43ab21f4.  */
+	  if (last_struct == NULL)
+	    fatal (_("Structure element encountered without a structure definition"));
+	  i = do_define (i, last_struct->u.astructdef.elements);
+	  break;
+	case C_MOE:
+	  if (last_enum == NULL)
+	    fatal (_("Enum element encountered without an enum definition"));
+	  i = do_define (i, last_enum->u.aenumdef.elements);
+	  break;
+	case C_STRTAG:
+	case C_ENTAG:
+	case C_UNTAG:
+	  /* Various definition.  */
+	  if (top_scope == NULL)
+	    fatal (_("Aggregate definition encountered without a scope"));
+	  i = do_define (i, top_scope);
+	  break;
+	case C_EXT:
+	case C_LABEL:
+	  if (file_scope == NULL)
+	    fatal (_("Label definition encountered without a file scope"));
+	  i = do_define (i, file_scope);
+	  break;
+	case C_STAT:
+	case C_TPDEF:
+	case C_AUTO:
+	case C_REG:
+	  if (top_scope == NULL)
+	    fatal (_("Variable definition encountered without a scope"));
+	  i = do_define (i, top_scope);
+	  break;
+	case C_EOS:
+	  i += sym->n_numaux + 1;
+	  break;
+	default:
+	  fatal (_("Unrecognised symbol class: %d"), sym->n_sclass);
+	}
+    }
+  do_sections_p2 (head);
+  return head;
+}
+
+struct coff_ofile *
+coff_grok (bfd *inabfd)
+{
+  long storage;
+  struct coff_ofile *p;
+  abfd = inabfd;
+
+  if (! bfd_family_coff (abfd))
+    {
+      non_fatal (_("%s: is not a COFF format file"), bfd_get_filename (abfd));
+      return NULL;
+    }
+
+  storage = bfd_get_symtab_upper_bound (abfd);
+
+  if (storage < 0)
+    bfd_fatal (abfd->filename);
+
+  syms = (asymbol **) xmalloc (storage);
+  symcount = bfd_canonicalize_symtab (abfd, syms);
+  if (symcount < 0)
+    bfd_fatal (abfd->filename);
+  rawsyms = obj_raw_syments (abfd);
+  rawcount = obj_raw_syment_count (abfd);
+  tindex = (struct coff_symbol **) (xcalloc (sizeof (struct coff_symbol *), rawcount));
+
+  p = doit ();
+  return p;
+}