* coffcode.h (coff_sym_filepos): Remove GNU960 conditional code.
[deliverable/binutils-gdb.git] / ld / ldexp.c
index 8e3ea6308e86ebb5ad8d221a4b738f65fcfef62c..ec25557bafb3879da2cc7f4b1f3dee05bc66eefd 100644 (file)
@@ -1,25 +1,25 @@
 /* This module handles expression trees.
    Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
-   2001, 2002
+   2001, 2002, 2003, 2004, 2005
    Free Software Foundation, Inc.
    Written by Steve Chamberlain of Cygnus Support <sac@cygnus.com>.
 
-This file is part of GLD, the Gnu Linker.
+   This file is part of GLD, the Gnu Linker.
 
-GLD 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, or (at your option)
-any later version.
+   GLD 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, or (at your option)
+   any later version.
 
-GLD 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.
+   GLD 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 GLD; see the file COPYING.  If not, write to the Free
-Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA.  */
+   You should have received a copy of the GNU General Public License
+   along with GLD; see the file COPYING.  If not, write to the Free
+   Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+   02111-1307, USA.  */
 
 /* This module is in charge of working out the contents of expressions.
 
@@ -36,44 +36,28 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
 #include "ldmain.h"
 #include "ldmisc.h"
 #include "ldexp.h"
-#include "ldgram.h"
+#include <ldgram.h>
 #include "ldlang.h"
 #include "libiberty.h"
 #include "safe-ctype.h"
 
-static void exp_print_token PARAMS ((token_code_type code, int infix_p));
-static void make_abs PARAMS ((etree_value_type *ptr));
-static etree_value_type new_abs PARAMS ((bfd_vma value));
-static void check PARAMS ((lang_output_section_statement_type *os,
-                          const char *name, const char *op));
-static etree_value_type new_rel
-  PARAMS ((bfd_vma, char *, lang_output_section_statement_type *section));
-static etree_value_type new_rel_from_section
-  PARAMS ((bfd_vma value, lang_output_section_statement_type *section));
-static etree_value_type fold_binary
-  PARAMS ((etree_type *tree,
-          lang_output_section_statement_type *current_section,
-          lang_phase_type allocation_done,
-          bfd_vma dot, bfd_vma *dotp));
-static etree_value_type fold_name
-  PARAMS ((etree_type *tree,
-          lang_output_section_statement_type *current_section,
-          lang_phase_type allocation_done,
-          bfd_vma dot));
 static etree_value_type exp_fold_tree_no_dot
-  PARAMS ((etree_type *tree,
-          lang_output_section_statement_type *current_section,
-          lang_phase_type allocation_done));
+  (etree_type *, lang_output_section_statement_type *, lang_phase_type);
+static bfd_vma align_n
+  (bfd_vma, bfd_vma);
 
 struct exp_data_seg exp_data_seg;
 
+segment_type *segments;
+
+/* Principally used for diagnostics.  */
+static bfd_boolean assigning_to_dot = FALSE;
+
 /* Print the string representation of the given token.  Surround it
-   with spaces if INFIX_P is true.  */
+   with spaces if INFIX_P is TRUE.  */
 
 static void
-exp_print_token (code, infix_p)
-     token_code_type code;
-     int infix_p;
+exp_print_token (token_code_type code, int infix_p)
 {
   static const struct
   {
@@ -120,9 +104,13 @@ exp_print_token (code, infix_p)
     { ADDR, "ADDR" },
     { LOADADDR, "LOADADDR" },
     { MAX_K, "MAX_K" },
-    { REL, "relocateable" },
+    { REL, "relocatable" },
     { DATA_SEGMENT_ALIGN, "DATA_SEGMENT_ALIGN" },
-    { DATA_SEGMENT_END, "DATA_SEGMENT_END" }
+    { DATA_SEGMENT_RELRO_END, "DATA_SEGMENT_RELRO_END" },
+    { DATA_SEGMENT_END, "DATA_SEGMENT_END" },
+    { ORIGIN, "ORIGIN" },
+    { LENGTH, "LENGTH" },
+    { SEGMENT_START, "SEGMENT_START" }
   };
   unsigned int idx;
 
@@ -145,8 +133,7 @@ exp_print_token (code, infix_p)
 }
 
 static void
-make_abs (ptr)
-     etree_value_type *ptr;
+make_abs (etree_value_type *ptr)
 {
   asection *s = ptr->section->bfd_section;
   ptr->value += s->vma;
@@ -154,33 +141,20 @@ make_abs (ptr)
 }
 
 static etree_value_type
-new_abs (value)
-     bfd_vma value;
+new_abs (bfd_vma value)
 {
   etree_value_type new;
-  new.valid_p = true;
+  new.valid_p = TRUE;
   new.section = abs_output_section;
   new.value = value;
+  new.str = NULL;
   return new;
 }
 
-static void
-check (os, name, op)
-     lang_output_section_statement_type *os;
-     const char *name;
-     const char *op;
-{
-  if (os == NULL)
-    einfo (_("%F%P: %s uses undefined section %s\n"), op, name);
-  if (! os->processed)
-    einfo (_("%F%P: %s forward reference of section %s\n"), op, name);
-}
-
 etree_type *
-exp_intop (value)
-     bfd_vma value;
+exp_intop (bfd_vma value)
 {
-  etree_type *new = (etree_type *) stat_alloc (sizeof (new->value));
+  etree_type *new = stat_alloc (sizeof (new->value));
   new->type.node_code = INT;
   new->value.value = value;
   new->value.str = NULL;
@@ -189,11 +163,9 @@ exp_intop (value)
 }
 
 etree_type *
-exp_bigintop (value, str)
-     bfd_vma value;
-     char *str;
+exp_bigintop (bfd_vma value, char *str)
 {
-  etree_type *new = (etree_type *) stat_alloc (sizeof (new->value));
+  etree_type *new = stat_alloc (sizeof (new->value));
   new->type.node_code = INT;
   new->value.value = value;
   new->value.str = str;
@@ -201,14 +173,12 @@ exp_bigintop (value, str)
   return new;
 }
 
-/* Build an expression representing an unnamed relocateable value.  */
+/* Build an expression representing an unnamed relocatable value.  */
 
 etree_type *
-exp_relop (section, value)
-     asection *section;
-     bfd_vma value;
+exp_relop (asection *section, bfd_vma value)
 {
-  etree_type *new = (etree_type *) stat_alloc (sizeof (new->rel));
+  etree_type *new = stat_alloc (sizeof (new->rel));
   new->type.node_code = REL;
   new->type.node_class = etree_rel;
   new->rel.section = section;
@@ -217,13 +187,12 @@ exp_relop (section, value)
 }
 
 static etree_value_type
-new_rel (value, str, section)
-     bfd_vma value;
-     char *str;
-     lang_output_section_statement_type *section;
+new_rel (bfd_vma value,
+        char *str,
+        lang_output_section_statement_type *section)
 {
   etree_value_type new;
-  new.valid_p = true;
+  new.valid_p = TRUE;
   new.value = value;
   new.str = str;
   new.section = section;
@@ -231,12 +200,11 @@ new_rel (value, str, section)
 }
 
 static etree_value_type
-new_rel_from_section (value, section)
-     bfd_vma value;
-     lang_output_section_statement_type *section;
+new_rel_from_section (bfd_vma value,
+                     lang_output_section_statement_type *section)
 {
   etree_value_type new;
-  new.valid_p = true;
+  new.valid_p = TRUE;
   new.value = value;
   new.str = NULL;
   new.section = section;
@@ -247,18 +215,126 @@ new_rel_from_section (value, section)
 }
 
 static etree_value_type
-fold_binary (tree, current_section, allocation_done, dot, dotp)
-     etree_type *tree;
-     lang_output_section_statement_type *current_section;
-     lang_phase_type allocation_done;
-     bfd_vma dot;
-     bfd_vma *dotp;
+fold_unary (etree_type *tree,
+           lang_output_section_statement_type *current_section,
+           lang_phase_type allocation_done,
+           bfd_vma dot,
+           bfd_vma *dotp)
 {
   etree_value_type result;
 
-  result = exp_fold_tree (tree->binary.lhs, current_section,
+  result = exp_fold_tree (tree->unary.child,
+                         current_section,
                          allocation_done, dot, dotp);
   if (result.valid_p)
+    {
+      switch (tree->type.node_code)
+       {
+       case ALIGN_K:
+         if (allocation_done != lang_first_phase_enum)
+           result = new_rel_from_section (align_n (dot, result.value),
+                                          current_section);
+         else
+           result.valid_p = FALSE;
+         break;
+
+       case ABSOLUTE:
+         if (allocation_done != lang_first_phase_enum)
+           {
+             result.value += result.section->bfd_section->vma;
+             result.section = abs_output_section;
+           }
+         else
+           result.valid_p = FALSE;
+         break;
+
+       case '~':
+         make_abs (&result);
+         result.value = ~result.value;
+         break;
+
+       case '!':
+         make_abs (&result);
+         result.value = !result.value;
+         break;
+
+       case '-':
+         make_abs (&result);
+         result.value = -result.value;
+         break;
+
+       case NEXT:
+         /* Return next place aligned to value.  */
+         if (allocation_done == lang_allocating_phase_enum)
+           {
+             make_abs (&result);
+             result.value = align_n (dot, result.value);
+           }
+         else
+           result.valid_p = FALSE;
+         break;
+
+       case DATA_SEGMENT_END:
+         if (allocation_done != lang_first_phase_enum
+             && current_section == abs_output_section
+             && (exp_data_seg.phase == exp_dataseg_align_seen
+                 || exp_data_seg.phase == exp_dataseg_relro_seen
+                 || exp_data_seg.phase == exp_dataseg_adjust
+                 || exp_data_seg.phase == exp_dataseg_relro_adjust
+                 || allocation_done != lang_allocating_phase_enum))
+           {
+             if (exp_data_seg.phase == exp_dataseg_align_seen
+                 || exp_data_seg.phase == exp_dataseg_relro_seen)
+               {
+                 exp_data_seg.phase = exp_dataseg_end_seen;
+                 exp_data_seg.end = result.value;
+               }
+           }
+         else
+           result.valid_p = FALSE;
+         break;
+
+       default:
+         FAIL ();
+         break;
+       }
+    }
+
+  return result;
+}
+
+static etree_value_type
+fold_binary (etree_type *tree,
+            lang_output_section_statement_type *current_section,
+            lang_phase_type allocation_done,
+            bfd_vma dot,
+            bfd_vma *dotp)
+{
+  etree_value_type result;
+
+  result = exp_fold_tree (tree->binary.lhs, current_section,
+                         allocation_done, dot, dotp);
+
+  /* The SEGMENT_START operator is special because its first
+     operand is a string, not the name of a symbol.  */
+  if (result.valid_p && tree->type.node_code == SEGMENT_START)
+    {
+      const char *segment_name;
+      segment_type *seg;
+      /* Check to see if the user has overridden the default
+        value.  */
+      segment_name = tree->binary.rhs->name.name;
+      for (seg = segments; seg; seg = seg->next) 
+       if (strcmp (seg->name, segment_name) == 0)
+         {
+           seg->used = TRUE;
+           result.value = seg->value;
+           result.str = NULL;
+           result.section = NULL;
+           break;
+         }
+    }
+  else if (result.valid_p)
     {
       etree_value_type other;
 
@@ -279,15 +355,14 @@ fold_binary (tree, current_section, allocation_done, dot, dotp)
              && (tree->type.node_code == '+'
                  || tree->type.node_code == '-'))
            {
-             etree_value_type hold;
-
-             /* If there is only one absolute term, make sure it is the
-                second one.  */
              if (other.section != abs_output_section)
                {
-                 hold = result;
-                 result = other;
-                 other = hold;
+                 /* Keep the section of the other term.  */
+                 if (tree->type.node_code == '+')
+                   other.value = result.value + other.value;
+                 else
+                   other.value = result.value - other.value;
+                 return other;
                }
            }
          else if (result.section != other.section
@@ -341,24 +416,34 @@ fold_binary (tree, current_section, allocation_done, dot, dotp)
                result = other;
              break;
 
+           case ALIGN_K:
+             result.value = align_n (result.value, other.value);
+             break;
+
            case DATA_SEGMENT_ALIGN:
              if (allocation_done != lang_first_phase_enum
                  && current_section == abs_output_section
                  && (exp_data_seg.phase == exp_dataseg_none
                      || exp_data_seg.phase == exp_dataseg_adjust
+                     || exp_data_seg.phase == exp_dataseg_relro_adjust
                      || allocation_done != lang_allocating_phase_enum))
                {
                  bfd_vma maxpage = result.value;
 
                  result.value = align_n (dot, maxpage);
-                 if (exp_data_seg.phase != exp_dataseg_adjust)
+                 if (exp_data_seg.phase == exp_dataseg_relro_adjust)
+                   result.value = exp_data_seg.base;
+                 else if (exp_data_seg.phase != exp_dataseg_adjust)
                    {
                      result.value += dot & (maxpage - 1);
                      if (allocation_done == lang_allocating_phase_enum)
                        {
                          exp_data_seg.phase = exp_dataseg_align_seen;
+                         exp_data_seg.min_base = align_n (dot, maxpage);
                          exp_data_seg.base = result.value;
                          exp_data_seg.pagesize = other.value;
+                         exp_data_seg.maxpagesize = maxpage;
+                         exp_data_seg.relro_end = 0;
                        }
                    }
                  else if (other.value < maxpage)
@@ -366,7 +451,33 @@ fold_binary (tree, current_section, allocation_done, dot, dotp)
                                    & (maxpage - other.value);
                }
              else
-               result.valid_p = false;
+               result.valid_p = FALSE;
+             break;
+
+           case DATA_SEGMENT_RELRO_END:
+             if (allocation_done != lang_first_phase_enum
+                 && (exp_data_seg.phase == exp_dataseg_align_seen
+                     || exp_data_seg.phase == exp_dataseg_adjust
+                     || exp_data_seg.phase == exp_dataseg_relro_adjust
+                     || allocation_done != lang_allocating_phase_enum))
+               {
+                 if (exp_data_seg.phase == exp_dataseg_align_seen
+                     || exp_data_seg.phase == exp_dataseg_relro_adjust)
+                   exp_data_seg.relro_end
+                     = result.value + other.value;
+                 if (exp_data_seg.phase == exp_dataseg_relro_adjust
+                     && (exp_data_seg.relro_end
+                         & (exp_data_seg.pagesize - 1)))
+                   {
+                     exp_data_seg.relro_end += exp_data_seg.pagesize - 1;
+                     exp_data_seg.relro_end &= ~(exp_data_seg.pagesize - 1);
+                     result.value = exp_data_seg.relro_end - other.value;
+                   }
+                 if (exp_data_seg.phase == exp_dataseg_align_seen)
+                   exp_data_seg.phase = exp_dataseg_relro_seen;
+               }
+             else
+               result.valid_p = FALSE;
              break;
 
            default:
@@ -375,70 +486,78 @@ fold_binary (tree, current_section, allocation_done, dot, dotp)
        }
       else
        {
-         result.valid_p = false;
+         result.valid_p = FALSE;
        }
     }
 
   return result;
 }
 
-etree_value_type
-invalid ()
+static etree_value_type
+fold_trinary (etree_type *tree,
+             lang_output_section_statement_type *current_section,
+             lang_phase_type allocation_done,
+             bfd_vma dot,
+             bfd_vma *dotp)
 {
-  etree_value_type new;
-  new.valid_p = false;
-  return new;
+  etree_value_type result;
+
+  result = exp_fold_tree (tree->trinary.cond, current_section,
+                         allocation_done, dot, dotp);
+  if (result.valid_p)
+    result = exp_fold_tree ((result.value
+                            ? tree->trinary.lhs
+                            : tree->trinary.rhs),
+                           current_section,
+                           allocation_done, dot, dotp);
+
+  return result;
 }
 
 static etree_value_type
-fold_name (tree, current_section, allocation_done, dot)
-     etree_type *tree;
-     lang_output_section_statement_type *current_section;
-     lang_phase_type allocation_done;
-     bfd_vma dot;
+fold_name (etree_type *tree,
+          lang_output_section_statement_type *current_section,
+          lang_phase_type allocation_done,
+          bfd_vma dot)
 {
   etree_value_type result;
 
+  result.valid_p = FALSE;
+
   switch (tree->type.node_code)
     {
     case SIZEOF_HEADERS:
       if (allocation_done != lang_first_phase_enum)
-       {
-         result = new_abs ((bfd_vma)
-                           bfd_sizeof_headers (output_bfd,
-                                               link_info.relocateable));
-       }
-      else
-       {
-         result.valid_p = false;
-       }
+       result = new_abs (bfd_sizeof_headers (output_bfd,
+                                             link_info.relocatable));
       break;
     case DEFINED:
       if (allocation_done == lang_first_phase_enum)
-       result.valid_p = false;
+       lang_track_definedness (tree->name.name);
       else
        {
          struct bfd_link_hash_entry *h;
+         int def_iteration
+           = lang_symbol_definition_iteration (tree->name.name);
 
          h = bfd_wrapped_link_hash_lookup (output_bfd, &link_info,
                                            tree->name.name,
-                                           false, false, true);
-         result.value = (h != (struct bfd_link_hash_entry *) NULL
+                                           FALSE, FALSE, TRUE);
+         result.value = (h != NULL
                          && (h->type == bfd_link_hash_defined
                              || h->type == bfd_link_hash_defweak
-                             || h->type == bfd_link_hash_common));
-         result.section = 0;
-         result.valid_p = true;
+                             || h->type == bfd_link_hash_common)
+                         && (def_iteration == lang_statement_iteration
+                             || def_iteration == -1));
+         result.section = abs_output_section;
+         result.valid_p = TRUE;
        }
       break;
     case NAME:
-      result.valid_p = false;
       if (tree->name.name[0] == '.' && tree->name.name[1] == 0)
        {
          if (allocation_done != lang_first_phase_enum)
            result = new_rel_from_section (dot, current_section);
-         else
-           result = invalid ();
        }
       else if (allocation_done != lang_first_phase_enum)
        {
@@ -446,10 +565,11 @@ fold_name (tree, current_section, allocation_done, dot)
 
          h = bfd_wrapped_link_hash_lookup (output_bfd, &link_info,
                                            tree->name.name,
-                                           false, false, true);
-         if (h != NULL
-             && (h->type == bfd_link_hash_defined
-                 || h->type == bfd_link_hash_defweak))
+                                           TRUE, FALSE, TRUE);
+         if (!h)
+           einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
+         else if (h->type == bfd_link_hash_defined
+                  || h->type == bfd_link_hash_defweak)
            {
              if (bfd_is_abs_section (h->u.def.section))
                result = new_abs (h->u.def.value);
@@ -479,9 +599,17 @@ fold_name (tree, current_section, allocation_done, dot)
                    }
                }
            }
-         else if (allocation_done == lang_final_phase_enum)
+         else if (allocation_done == lang_final_phase_enum
+                  || assigning_to_dot)
            einfo (_("%F%S: undefined symbol `%s' referenced in expression\n"),
                   tree->name.name);
+         else if (h->type == bfd_link_hash_new)
+           {
+             h->type = bfd_link_hash_undefined;
+             h->u.undef.abfd = NULL;
+             if (h->u.undef.next == NULL && h != link_info.hash->undefs_tail)
+               bfd_link_add_undef (link_info.hash, h);
+           }
        }
       break;
 
@@ -491,11 +619,9 @@ fold_name (tree, current_section, allocation_done, dot)
          lang_output_section_statement_type *os;
 
          os = lang_output_section_find (tree->name.name);
-         check (os, tree->name.name, "ADDR");
-         result = new_rel (0, NULL, os);
+         if (os && os->processed > 0)
+           result = new_rel (0, NULL, os);
        }
-      else
-       result = invalid ();
       break;
 
     case LOADADDR:
@@ -504,16 +630,16 @@ fold_name (tree, current_section, allocation_done, dot)
          lang_output_section_statement_type *os;
 
          os = lang_output_section_find (tree->name.name);
-         check (os, tree->name.name, "LOADADDR");
-         if (os->load_base == NULL)
-           result = new_rel (0, NULL, os);
-         else
-           result = exp_fold_tree_no_dot (os->load_base,
-                                          abs_output_section,
-                                          allocation_done);
+         if (os && os->processed != 0)
+           {
+             if (os->load_base == NULL)
+               result = new_rel (0, NULL, os);
+             else
+               result = exp_fold_tree_no_dot (os->load_base,
+                                              abs_output_section,
+                                              allocation_done);
+           }
        }
-      else
-       result = invalid ();
       break;
 
     case SIZEOF:
@@ -523,11 +649,35 @@ fold_name (tree, current_section, allocation_done, dot)
          lang_output_section_statement_type *os;
 
          os = lang_output_section_find (tree->name.name);
-         check (os, tree->name.name, "SIZEOF");
-         result = new_abs (os->bfd_section->_raw_size / opb);
+         if (os && os->processed > 0)
+           result = new_abs (os->bfd_section->size / opb);
        }
-      else
-       result = invalid ();
+      break;
+
+    case LENGTH:
+      {
+        lang_memory_region_type *mem;
+        
+        mem = lang_memory_region_lookup (tree->name.name, FALSE);  
+        if (mem != NULL) 
+          result = new_abs (mem->length);
+        else          
+          einfo (_("%F%S: undefined MEMORY region `%s' referenced in expression\n"),
+                  tree->name.name);
+      }
+      break;
+
+    case ORIGIN:
+      {
+        lang_memory_region_type *mem;
+        
+        mem = lang_memory_region_lookup (tree->name.name, FALSE);  
+        if (mem != NULL) 
+          result = new_abs (mem->origin);
+        else          
+          einfo (_("%F%S: undefined MEMORY region `%s' referenced in expression\n"),
+                  tree->name.name);
+      }
       break;
 
     default:
@@ -539,18 +689,17 @@ fold_name (tree, current_section, allocation_done, dot)
 }
 
 etree_value_type
-exp_fold_tree (tree, current_section, allocation_done, dot, dotp)
-     etree_type *tree;
-     lang_output_section_statement_type *current_section;
-     lang_phase_type allocation_done;
-     bfd_vma dot;
-     bfd_vma *dotp;
+exp_fold_tree (etree_type *tree,
+              lang_output_section_statement_type *current_section,
+              lang_phase_type allocation_done,
+              bfd_vma dot,
+              bfd_vma *dotp)
 {
   etree_value_type result;
 
   if (tree == NULL)
     {
-      result.valid_p = false;
+      result.valid_p = FALSE;
       return result;
     }
 
@@ -562,7 +711,7 @@ exp_fold_tree (tree, current_section, allocation_done, dot, dotp)
 
     case etree_rel:
       if (allocation_done != lang_final_phase_enum)
-       result.valid_p = false;
+       result.valid_p = FALSE;
       else
        result = new_rel ((tree->rel.value
                           + tree->rel.section->output_section->vma
@@ -578,96 +727,14 @@ exp_fold_tree (tree, current_section, allocation_done, dot, dotp)
       if (result.valid_p)
        {
          if (! result.value)
-           einfo ("%F%P: %s\n", tree->assert_s.message);
+           einfo ("%X%P: %s\n", tree->assert_s.message);
          return result;
        }
       break;
 
     case etree_unary:
-      result = exp_fold_tree (tree->unary.child,
-                             current_section,
-                             allocation_done, dot, dotp);
-      if (result.valid_p)
-       {
-         switch (tree->type.node_code)
-           {
-           case ALIGN_K:
-             if (allocation_done != lang_first_phase_enum)
-               result = new_rel_from_section (align_n (dot, result.value),
-                                              current_section);
-             else
-               result.valid_p = false;
-             break;
-
-           case ABSOLUTE:
-             if (allocation_done != lang_first_phase_enum)
-               {
-                 result.value += result.section->bfd_section->vma;
-                 result.section = abs_output_section;
-               }
-             else
-               result.valid_p = false;
-             break;
-
-           case '~':
-             make_abs (&result);
-             result.value = ~result.value;
-             break;
-
-           case '!':
-             make_abs (&result);
-             result.value = !result.value;
-             break;
-
-           case '-':
-             make_abs (&result);
-             result.value = -result.value;
-             break;
-
-           case NEXT:
-             /* Return next place aligned to value.  */
-             if (allocation_done == lang_allocating_phase_enum)
-               {
-                 make_abs (&result);
-                 result.value = align_n (dot, result.value);
-               }
-             else
-               result.valid_p = false;
-             break;
-
-           case DATA_SEGMENT_END:
-             if (allocation_done != lang_first_phase_enum
-                 && current_section == abs_output_section
-                 && (exp_data_seg.phase == exp_dataseg_align_seen
-                     || exp_data_seg.phase == exp_dataseg_adjust
-                     || allocation_done != lang_allocating_phase_enum))
-               {
-                 if (exp_data_seg.phase == exp_dataseg_align_seen)
-                   {
-                     exp_data_seg.phase = exp_dataseg_end_seen;
-                     exp_data_seg.end = result.value;
-                   }
-               }
-             else
-               result.valid_p = false;
-             break;
-
-           default:
-             FAIL ();
-             break;
-           }
-       }
-      break;
-
-    case etree_trinary:
-      result = exp_fold_tree (tree->trinary.cond, current_section,
-                             allocation_done, dot, dotp);
-      if (result.valid_p)
-       result = exp_fold_tree ((result.value
-                                ? tree->trinary.lhs
-                                : tree->trinary.rhs),
-                               current_section,
-                               allocation_done, dot, dotp);
+      result = fold_unary (tree, current_section, allocation_done,
+                          dot, dotp);
       break;
 
     case etree_binary:
@@ -675,6 +742,11 @@ exp_fold_tree (tree, current_section, allocation_done, dot, dotp)
                            dot, dotp);
       break;
 
+    case etree_trinary:
+      result = fold_trinary (tree, current_section, allocation_done,
+                            dot, dotp);
+      break;
+
     case etree_assign:
     case etree_provide:
     case etree_provided:
@@ -687,10 +759,13 @@ exp_fold_tree (tree, current_section, allocation_done, dot, dotp)
              || (allocation_done == lang_final_phase_enum
                  && current_section == abs_output_section))
            {
+             /* Notify the folder that this is an assignment to dot.  */
+             assigning_to_dot = TRUE;
              result = exp_fold_tree (tree->assign.src,
                                      current_section,
-                                     allocation_done, dot,
-                                     dotp);
+                                     allocation_done, dot, dotp);
+             assigning_to_dot = FALSE;
+
              if (! result.valid_p)
                einfo (_("%F%S invalid assignment to location counter\n"));
              else
@@ -720,22 +795,23 @@ exp_fold_tree (tree, current_section, allocation_done, dot, dotp)
                                  dot, dotp);
          if (result.valid_p)
            {
-             boolean create;
+             bfd_boolean create;
              struct bfd_link_hash_entry *h;
 
              if (tree->type.node_class == etree_assign)
-               create = true;
+               create = TRUE;
              else
-               create = false;
+               create = FALSE;
              h = bfd_link_hash_lookup (link_info.hash, tree->assign.dst,
-                                       create, false, false);
-             if (h == (struct bfd_link_hash_entry *) NULL)
+                                       create, FALSE, TRUE);
+             if (h == NULL)
                {
-                 if (tree->type.node_class == etree_assign)
+                 if (create)
                    einfo (_("%P%F:%s: hash creation failed\n"),
                           tree->assign.dst);
                }
              else if (tree->type.node_class == etree_provide
+                      && h->type != bfd_link_hash_new
                       && h->type != bfd_link_hash_undefined
                       && h->type != bfd_link_hash_common)
                {
@@ -746,6 +822,7 @@ exp_fold_tree (tree, current_section, allocation_done, dot, dotp)
                {
                  /* FIXME: Should we worry if the symbol is already
                     defined?  */
+                 lang_update_definedness (tree->assign.dst, h);
                  h->type = bfd_link_hash_defined;
                  h->u.def.value = result.value;
                  h->u.def.section = result.section->bfd_section;
@@ -769,20 +846,15 @@ exp_fold_tree (tree, current_section, allocation_done, dot, dotp)
 }
 
 static etree_value_type
-exp_fold_tree_no_dot (tree, current_section, allocation_done)
-     etree_type *tree;
-     lang_output_section_statement_type *current_section;
-     lang_phase_type allocation_done;
+exp_fold_tree_no_dot (etree_type *tree,
+                     lang_output_section_statement_type *current_section,
+                     lang_phase_type allocation_done)
 {
-  return exp_fold_tree (tree, current_section, allocation_done,
-                       (bfd_vma) 0, (bfd_vma *) NULL);
+  return exp_fold_tree (tree, current_section, allocation_done, 0, NULL);
 }
 
 etree_type *
-exp_binop (code, lhs, rhs)
-     int code;
-     etree_type *lhs;
-     etree_type *rhs;
+exp_binop (int code, etree_type *lhs, etree_type *rhs)
 {
   etree_type value, *new;
   etree_value_type r;
@@ -798,17 +870,13 @@ exp_binop (code, lhs, rhs)
     {
       return exp_intop (r.value);
     }
-  new = (etree_type *) stat_alloc (sizeof (new->binary));
-  memcpy ((char *) new, (char *) &value, sizeof (new->binary));
+  new = stat_alloc (sizeof (new->binary));
+  memcpy (new, &value, sizeof (new->binary));
   return new;
 }
 
 etree_type *
-exp_trinop (code, cond, lhs, rhs)
-     int code;
-     etree_type *cond;
-     etree_type *lhs;
-     etree_type *rhs;
+exp_trinop (int code, etree_type *cond, etree_type *lhs, etree_type *rhs)
 {
   etree_type value, *new;
   etree_value_type r;
@@ -817,21 +885,17 @@ exp_trinop (code, cond, lhs, rhs)
   value.trinary.cond = cond;
   value.trinary.rhs = rhs;
   value.type.node_class = etree_trinary;
-  r = exp_fold_tree_no_dot (&value,
-                           (lang_output_section_statement_type *) NULL,
-                           lang_first_phase_enum);
+  r = exp_fold_tree_no_dot (&value, NULL, lang_first_phase_enum);
   if (r.valid_p)
     return exp_intop (r.value);
 
-  new = (etree_type *) stat_alloc (sizeof (new->trinary));
-  memcpy ((char *) new, (char *) &value, sizeof (new->trinary));
+  new = stat_alloc (sizeof (new->trinary));
+  memcpy (new, &value, sizeof (new->trinary));
   return new;
 }
 
 etree_type *
-exp_unop (code, child)
-     int code;
-     etree_type *child;
+exp_unop (int code, etree_type *child)
 {
   etree_type value, *new;
 
@@ -844,15 +908,13 @@ exp_unop (code, child)
   if (r.valid_p)
     return exp_intop (r.value);
 
-  new = (etree_type *) stat_alloc (sizeof (new->unary));
-  memcpy ((char *) new, (char *) &value, sizeof (new->unary));
+  new = stat_alloc (sizeof (new->unary));
+  memcpy (new, &value, sizeof (new->unary));
   return new;
 }
 
 etree_type *
-exp_nameop (code, name)
-     int code;
-     const char *name;
+exp_nameop (int code, const char *name)
 {
   etree_type value, *new;
   etree_value_type r;
@@ -860,23 +922,18 @@ exp_nameop (code, name)
   value.name.name = name;
   value.name.type.node_class = etree_name;
 
-  r = exp_fold_tree_no_dot (&value,
-                           (lang_output_section_statement_type *) NULL,
-                           lang_first_phase_enum);
+  r = exp_fold_tree_no_dot (&value, NULL, lang_first_phase_enum);
   if (r.valid_p)
     return exp_intop (r.value);
 
-  new = (etree_type *) stat_alloc (sizeof (new->name));
-  memcpy ((char *) new, (char *) &value, sizeof (new->name));
+  new = stat_alloc (sizeof (new->name));
+  memcpy (new, &value, sizeof (new->name));
   return new;
 
 }
 
 etree_type *
-exp_assop (code, dst, src)
-     int code;
-     const char *dst;
-     etree_type *src;
+exp_assop (int code, const char *dst, etree_type *src)
 {
   etree_type value, *new;
 
@@ -886,25 +943,19 @@ exp_assop (code, dst, src)
   value.assign.dst = dst;
   value.assign.type.node_class = etree_assign;
 
-#if 0
-  if (exp_fold_tree_no_dot (&value, &result))
-    return exp_intop (result);
-#endif
-  new = (etree_type *) stat_alloc (sizeof (new->assign));
-  memcpy ((char *) new, (char *) &value, sizeof (new->assign));
+  new = stat_alloc (sizeof (new->assign));
+  memcpy (new, &value, sizeof (new->assign));
   return new;
 }
 
 /* Handle PROVIDE.  */
 
 etree_type *
-exp_provide (dst, src)
-     const char *dst;
-     etree_type *src;
+exp_provide (const char *dst, etree_type *src)
 {
   etree_type *n;
 
-  n = (etree_type *) stat_alloc (sizeof (n->assign));
+  n = stat_alloc (sizeof (n->assign));
   n->assign.type.node_code = '=';
   n->assign.type.node_class = etree_provide;
   n->assign.src = src;
@@ -915,13 +966,11 @@ exp_provide (dst, src)
 /* Handle ASSERT.  */
 
 etree_type *
-exp_assert (exp, message)
-     etree_type *exp;
-     const char *message;
+exp_assert (etree_type *exp, const char *message)
 {
   etree_type *n;
 
-  n = (etree_type *) stat_alloc (sizeof (n->assert_s));
+  n = stat_alloc (sizeof (n->assert_s));
   n->assert_s.type.node_code = '!';
   n->assert_s.type.node_class = etree_assert;
   n->assert_s.child = exp;
@@ -930,8 +979,7 @@ exp_assert (exp, message)
 }
 
 void
-exp_print_tree (tree)
-     etree_type *tree;
+exp_print_tree (etree_type *tree)
 {
   if (config.map_file == NULL)
     config.map_file = stderr;
@@ -953,15 +1001,8 @@ exp_print_tree (tree)
       minfo ("%s+0x%v", tree->rel.section->name, tree->rel.value);
       return;
     case etree_assign:
-#if 0
-      if (tree->assign.dst->sdefs != (asymbol *) NULL)
-       fprintf (config.map_file, "%s (%x) ", tree->assign.dst->name,
-                tree->assign.dst->sdefs->value);
-      else
-       fprintf (config.map_file, "%s (UNDEFINED)", tree->assign.dst->name);
-#endif
       fprintf (config.map_file, "%s", tree->assign.dst);
-      exp_print_token (tree->type.node_code, true);
+      exp_print_token (tree->type.node_code, TRUE);
       exp_print_tree (tree->assign.src);
       break;
     case etree_provide:
@@ -973,7 +1014,7 @@ exp_print_tree (tree)
     case etree_binary:
       fprintf (config.map_file, "(");
       exp_print_tree (tree->binary.lhs);
-      exp_print_token (tree->type.node_code, true);
+      exp_print_token (tree->type.node_code, TRUE);
       exp_print_tree (tree->binary.rhs);
       fprintf (config.map_file, ")");
       break;
@@ -985,7 +1026,7 @@ exp_print_tree (tree)
       exp_print_tree (tree->trinary.rhs);
       break;
     case etree_unary:
-      exp_print_token (tree->unary.type.node_code, false);
+      exp_print_token (tree->unary.type.node_code, FALSE);
       if (tree->unary.child)
        {
          fprintf (config.map_file, " (");
@@ -1010,7 +1051,7 @@ exp_print_tree (tree)
        }
       else
        {
-         exp_print_token (tree->type.node_code, false);
+         exp_print_token (tree->type.node_code, FALSE);
          if (tree->name.name)
            fprintf (config.map_file, " (%s)", tree->name.name);
        }
@@ -1022,11 +1063,10 @@ exp_print_tree (tree)
 }
 
 bfd_vma
-exp_get_vma (tree, def, name, allocation_done)
-     etree_type *tree;
-     bfd_vma def;
-     char *name;
-     lang_phase_type allocation_done;
+exp_get_vma (etree_type *tree,
+            bfd_vma def,
+            char *name,
+            lang_phase_type allocation_done)
 {
   etree_value_type r;
 
@@ -1042,21 +1082,19 @@ exp_get_vma (tree, def, name, allocation_done)
 }
 
 int
-exp_get_value_int (tree, def, name, allocation_done)
-     etree_type *tree;
-     int def;
-     char *name;
-     lang_phase_type allocation_done;
+exp_get_value_int (etree_type *tree,
+                  int def,
+                  char *name,
+                  lang_phase_type allocation_done)
 {
-  return (int) exp_get_vma (tree, (bfd_vma) def, name, allocation_done);
+  return exp_get_vma (tree, def, name, allocation_done);
 }
 
 fill_type *
-exp_get_fill (tree, def, name, allocation_done)
-     etree_type *tree;
-     fill_type *def;
-     char *name;
-     lang_phase_type allocation_done;
+exp_get_fill (etree_type *tree,
+             fill_type *def,
+             char *name,
+             lang_phase_type allocation_done)
 {
   fill_type *fill;
   etree_value_type r;
@@ -1074,10 +1112,10 @@ exp_get_fill (tree, def, name, allocation_done)
     {
       unsigned char *dst;
       unsigned char *s;
-      fill = (fill_type *) xmalloc ((len + 1) / 2 + sizeof (*fill) - 1);
+      fill = xmalloc ((len + 1) / 2 + sizeof (*fill) - 1);
       fill->size = (len + 1) / 2;
       dst = fill->data;
-      s = r.str;
+      s = (unsigned char *) r.str;
       val = 0;
       do
        {
@@ -1099,7 +1137,7 @@ exp_get_fill (tree, def, name, allocation_done)
     }
   else
     {
-      fill = (fill_type *) xmalloc (4 + sizeof (*fill) - 1);
+      fill = xmalloc (4 + sizeof (*fill) - 1);
       val = r.value;
       fill->data[0] = (val >> 24) & 0xff;
       fill->data[1] = (val >> 16) & 0xff;
@@ -1111,11 +1149,10 @@ exp_get_fill (tree, def, name, allocation_done)
 }
 
 bfd_vma
-exp_get_abs_int (tree, def, name, allocation_done)
-     etree_type *tree;
-     int def ATTRIBUTE_UNUSED;
-     char *name;
-     lang_phase_type allocation_done;
+exp_get_abs_int (etree_type *tree,
+                int def ATTRIBUTE_UNUSED,
+                char *name,
+                lang_phase_type allocation_done)
 {
   etree_value_type res;
   res = exp_fold_tree_no_dot (tree, abs_output_section, allocation_done);
@@ -1128,9 +1165,8 @@ exp_get_abs_int (tree, def, name, allocation_done)
   return res.value;
 }
 
-bfd_vma align_n (value, align)
-     bfd_vma value;
-     bfd_vma align;
+static bfd_vma
+align_n (bfd_vma value, bfd_vma align)
 {
   if (align <= 1)
     return value;
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