19990502 sourceware importbinu_ss_19990502

1 files changed, 737 insertions, 0 deletions

diff --git a/binutils/coffgrok.c b/binutils/coffgrok.c
new file mode 100644
index 0000000..8c4e6c9
--- /dev/null
+++ b/binutils/coffgrok.c
@@ -0,0 +1,737 @@
+/* coffgrok.c
+   Copyright (C) 1994, 95, 97, 1998 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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 <bfd.h>
+#include "bucomm.h"
+
+#include "coff/internal.h"
+#include "../bfd/libcoff.h"
+#include "coffgrok.h"
+int lofile = 1;
+static struct coff_scope *top_scope;
+static struct coff_scope *file_scope;
+static struct coff_ofile *ofile;
+
+struct coff_symbol *last_function_symbol;
+struct coff_type *last_function_type;
+struct coff_type *last_struct;
+struct coff_type *last_enum;
+struct coff_sfile *cur_sfile;
+
+static struct coff_symbol **tindex;
+
+
+static asymbol **syms;
+static long symcount;
+
+#define N(x) ((x)->_n._n_nptr[1])
+
+static struct coff_ptr_struct *rawsyms;
+static int rawcount;
+static bfd *abfd;
+extern char *xcalloc ();
+#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 ()
+{
+  struct coff_scope *l;
+  l = (struct coff_scope *) (xcalloc (sizeof (struct coff_scope), 1));
+  return l;
+}
+
+static struct coff_symbol *
+empty_symbol ()
+{
+  return (struct coff_symbol *) (xcalloc (sizeof (struct coff_symbol), 1));
+}
+
+/*int l;*/
+static void
+push_scope (link)
+     int link;
+{
+  struct coff_scope *n = empty_scope ();
+  if (link)
+    {
+      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 ()
+{
+  top_scope = top_scope->parent;
+}
+
+static void
+do_sections_p1 (head)
+     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;
+      int i = section->target_index;
+      arelent **relpp;
+      long relcount;
+
+      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 = section->_raw_size;
+      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 (head)
+     struct coff_ofile *head;
+{
+  asection *section;
+  for (section = abfd->sections; section; section = section->next)
+    {
+      unsigned int j;
+
+      for (j = 0; j < section->reloc_count; j++)
+	{
+	  int idx;
+	  int i = section->target_index;
+	  struct coff_reloc *r = head->sections[i].relocs + j;
+	  arelent *sr = section->relocation + j;
+	  r->offset = sr->address;
+	  r->addend = sr->addend;
+	  idx = ((coff_symbol_type *) (sr->sym_ptr_ptr[0]))->native - rawsyms;
+	  r->symbol = tindex[idx];
+	}
+    }
+}
+
+static struct coff_where *
+do_where (i)
+     int i;
+{
+  struct internal_syment *sym = &rawsyms[i].u.syment;
+  struct coff_where *where =
+    (struct coff_where *) (xmalloc (sizeof (struct coff_where)));
+  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;
+      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:
+      abort ();
+      break;
+    }
+  return where;
+}
+
+static
+struct coff_line *
+do_lines (i, name)
+     int i;
+     char *name;
+{
+  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)
+    {
+      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; 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; 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 (i)
+     int i;
+{
+  struct internal_syment *sym = &rawsyms[i].u.syment;
+  union internal_auxent *aux = &rawsyms[i + 1].u.auxent;
+  struct coff_type *res =
+    (struct coff_type *) xmalloc (sizeof (struct coff_type));
+  int type = sym->n_type;
+  int which_dt = 0;
+  int dimind = 0;
+
+  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;
+	  res->size = aux->x_scn.x_scnlen;
+	}
+      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;
+
+
+      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->x_sym.x_tagndx.p)
+	    {
+	      /* Refering to a struct defined elsewhere */
+	      res->type = coff_structref_type;
+	      res->u.astructref.ref = tindex[INDEXOF (aux->x_sym.x_tagndx.p)];
+	      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 anonynmous */
+	  res->type = coff_structref_type;
+	  res->u.astructref.ref = 0;
+	  res->size = 0;
+	}
+      break;
+    case T_ENUM:
+      if (aux->x_sym.x_tagndx.p)
+	{
+	  /* Refering to a enum defined elsewhere */
+	  res->type = coff_enumref_type;
+	  res->u.aenumref.ref = tindex[INDEXOF (aux->x_sym.x_tagndx.p)];
+	  res->size = res->u.aenumref.ref->type->size;
+	}
+      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 = (dimind < DIMNUM
+		       ? aux->x_sym.x_fcnary.x_ary.x_dimen[dimind]
+		       : 0);
+	    ++dimind;
+	    ptr->type = coff_array_type;
+	    ptr->size = 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, sym->_n._n_nptr[1]);
+	    ptr->u.function.code = 0;
+	    last_function_type = ptr;
+	    res = ptr;
+	    break;
+	  }
+	}
+    }
+  return res;
+}
+
+static struct coff_visible *
+do_visible (i)
+     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:
+      abort ();
+      break;
+
+    }
+  visible->type = t;
+  return visible;
+}
+
+static int
+do_define (i, b)
+     int i;
+     struct coff_scope *b;
+{
+  static int symbol_index;
+  struct internal_syment *sym = &rawsyms[i].u.syment;
+
+  /* Define a symbol and attach to block b */
+  struct coff_symbol *s = empty_symbol ();
+
+  s->number = ++symbol_index;
+  s->name = sym->_n._n_nptr[1];
+  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 = cur_sfile->section + s->where->section->number;
+
+      if (!is->init)
+	{
+	  is->low = s->where->offset;
+	  is->high = s->where->offset + 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 ()
+{
+  int i;
+  int infile = 0;
+  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 = sym->_n._n_nptr[1];
+	    n->next = 0;
+
+	    if (infile)
+	      {
+		pop_scope ();
+	      }
+	    infile = 1;
+	    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 = sym->_n._n_nptr[1];
+	    if (name[1] == 'b')
+	      {
+		/* Function start */
+		push_scope (0);
+		last_function_type->u.function.code = top_scope;
+		top_scope->sec = ofile->sections + sym->n_scnum;
+		top_scope->offset = sym->n_value;
+	      }
+	    else
+	      {
+		top_scope->size = sym->n_value - top_scope->offset + 1;
+		pop_scope ();
+
+	      }
+	    i += sym->n_numaux + 1;
+	  }
+	  break;
+
+	case C_BLOCK:
+	  {
+	    char *name = sym->_n._n_nptr[1];
+	    if (name[1] == 'b')
+	      {
+		/* Block start */
+		push_scope (1);
+		top_scope->sec = ofile->sections + sym->n_scnum;
+		top_scope->offset = sym->n_value;
+
+	      }
+	    else
+	      {
+		top_scope->size = sym->n_value - top_scope->offset + 1;
+		pop_scope ();
+	      }
+	    i += sym->n_numaux + 1;
+	  }
+	  break;
+	case C_REGPARM:
+	case C_ARG:
+	  i = do_define (i, last_function_symbol->type->u.function.parameters);
+	  break;
+	case C_MOS:
+	case C_MOU:
+	case C_FIELD:
+	  i = do_define (i, last_struct->u.astructdef.elements);
+	  break;
+	case C_MOE:
+	  i = do_define (i, last_enum->u.aenumdef.elements);
+	  break;
+	case C_STRTAG:
+	case C_ENTAG:
+	case C_UNTAG:
+	  /* Various definition */
+	  i = do_define (i, top_scope);
+	  break;
+	case C_EXT:
+	case C_LABEL:
+	  i = do_define (i, file_scope);
+	  break;
+	case C_STAT:
+	case C_TPDEF:
+	case C_AUTO:
+	case C_REG:
+	  i = do_define (i, top_scope);
+	  break;
+	default:
+	  abort ();
+	case C_EOS:
+	  i += sym->n_numaux + 1;
+	  break;
+	}
+    }
+  do_sections_p2 (head);
+  return head;
+}
+
+struct coff_ofile *
+coff_grok (inabfd)
+     bfd *inabfd;
+{
+  long storage;
+  struct coff_ofile *p;
+  abfd = inabfd;
+  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;
+}