X-Git-Url: http://drtracing.org/?a=blobdiff_plain;ds=sidebyside;f=ld%2Fldexp.h;h=717e839bd41131703029f2a0386ceee7e941d2df;hb=612f258a491539f36c618030cc558e83e7d58b4e;hp=fed3a0da44c9e2d62f7f944a6549b82ad7b3d8e1;hpb=01f0fe5e0450edf168c1f612feb93cf588e4e7ea;p=deliverable%2Fbinutils-gdb.git

diff --git a/ld/ldexp.h b/ld/ldexp.h
index fed3a0da44..717e839bd4 100644
--- a/ld/ldexp.h
+++ b/ld/ldexp.h
@@ -1,23 +1,22 @@
 /* ldexp.h -
-   Copyright 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2000, 2001, 2002,
-   2003, 2004, 2005 Free Software Foundation, Inc.
+   Copyright (C) 1991-2020 Free Software Foundation, Inc.
 
-   This file is part of GLD, the Gnu Linker.
+   This file is part of the GNU Binutils.
 
-   GLD is free software; you can redistribute it and/or modify
+   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, or (at your option)
-   any later version.
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
 
-   GLD is distributed in the hope that it will be useful,
+   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 GLD; see the file COPYING.  If not, write to the Free
-   Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
-   02110-1301, USA.  */
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+   MA 02110-1301, USA.  */
 
 #ifndef LDEXP_H
 #define LDEXP_H
@@ -30,20 +29,24 @@ typedef struct {
   bfd_boolean valid_p;
 } etree_value_type;
 
+enum node_tree_enum {
+  etree_binary,
+  etree_trinary,
+  etree_unary,
+  etree_name,
+  etree_assign,
+  etree_provide,
+  etree_provided,
+  etree_value,
+  etree_assert,
+  etree_rel
+};
+
 typedef struct {
   int node_code;
-  enum {
-    etree_binary,
-    etree_trinary,
-    etree_unary,
-    etree_name,
-    etree_assign,
-    etree_provide,
-    etree_provided,
-    etree_value,
-    etree_assert,
-    etree_rel
-  } node_class;
+  unsigned int lineno;
+  const char *filename;
+  enum node_tree_enum node_class;
 } node_type;
 
 typedef union etree_union {
@@ -90,13 +93,57 @@ typedef union etree_union {
   } assert_s;
 } etree_type;
 
-typedef enum {
+/* Expression evaluation control.  */
+typedef enum
+{
+  /* Parsing linker script.  Will only return "valid" for expressions
+     that evaluate to a constant.  */
   lang_first_phase_enum,
+  /* Prior to section sizing.  */
   lang_mark_phase_enum,
+  /* During section sizing.  */
   lang_allocating_phase_enum,
-  lang_final_phase_enum
+  /* During assignment of symbol values when relaxation in progress.  */
+  lang_assigning_phase_enum,
+  /* Final assignment of symbol values.  */
+  lang_final_phase_enum,
+  /* Run after symbol values have been fixed, for lang_map.  */
+  lang_fixed_phase_enum
 } lang_phase_type;
 
+union lang_statement_union;
+
+enum phase_enum {
+  /* We step through the first four states here as we see the
+     associated linker script tokens.  */
+  exp_seg_none,
+  exp_seg_align_seen,
+  exp_seg_relro_seen,
+  exp_seg_end_seen,
+  /* The last three states are final, and affect the value returned
+     by XXX_SEGMENT_ALIGN.  */
+  exp_seg_relro_adjust,
+  exp_seg_adjust,
+  exp_seg_done
+};
+
+enum relro_enum {
+  exp_seg_relro_none,
+  exp_seg_relro_start,
+  exp_seg_relro_end,
+};
+
+typedef struct {
+  enum phase_enum phase;
+
+  bfd_vma base, relro_offset, relro_end, end, pagesize, maxpagesize;
+
+  enum relro_enum relro;
+
+  union lang_statement_union *relro_start_stat;
+  union lang_statement_union *relro_end_stat;
+} seg_align_type;
+
 struct ldexp_control {
   /* Modify expression evaluation depending on this.  */
   lang_phase_type phase;
@@ -104,6 +151,24 @@ struct ldexp_control {
   /* Principally used for diagnostics.  */
   bfd_boolean assigning_to_dot;
 
+  /* Set if the current expression used "dot", SEGMENT_START or
+     ORIGIN, but not ABSOLUTE or combined symbols in a way that forces
+     an absolute result.  Used in tracking symbols assigned from dot
+     outside of output section statements, in order to later convert
+     them from absolute.  */
+  bfd_boolean rel_from_abs;
+
+  /* If evaluating an assignment, the destination.  Cleared if an
+     etree_name NAME matches this, to signal a self-assignment.
+     Note that an etree_name DEFINED does not clear this field, nor
+     does the false branch of a trinary expression.  */
+  const char *assign_name;
+
+  /* If evaluating an assignment, the source if it is an expression
+     referencing single etree_name NAME, or a trinary expression where
+     the true branch references a single etree_name NAME.  */
+  struct bfd_link_hash_entry *assign_src;
+
   /* Working results.  */
   etree_value_type result;
   bfd_vma dot;
@@ -113,18 +178,7 @@ struct ldexp_control {
   asection *section;
 
   /* State machine and results for DATASEG.  */
-  struct {
-    enum {
-      exp_dataseg_none,
-      exp_dataseg_align_seen,
-      exp_dataseg_relro_seen,
-      exp_dataseg_end_seen,
-      exp_dataseg_relro_adjust,
-      exp_dataseg_adjust
-    } phase;
-
-    bfd_vma base, min_base, relro_end, end, pagesize, maxpagesize;
-  } dataseg;
+  seg_align_type dataseg;
 };
 
 extern struct ldexp_control expld;
@@ -155,6 +209,8 @@ etree_type *exp_relop
   (asection *, bfd_vma);
 void exp_fold_tree
   (etree_type *, asection *, bfd_vma *);
+void exp_fold_tree_no_dot
+  (etree_type *);
 etree_type *exp_binop
   (int, etree_type *, etree_type *);
 etree_type *exp_trinop
@@ -163,8 +219,10 @@ etree_type *exp_unop
   (int, etree_type *);
 etree_type *exp_nameop
   (int, const char *);
-etree_type *exp_assop
-  (int, const char *, etree_type *);
+etree_type *exp_assign
+  (const char *, etree_type *, bfd_boolean);
+etree_type *exp_defsym
+  (const char *, etree_type *);
 etree_type *exp_provide
   (const char *, etree_type *, bfd_boolean);
 etree_type *exp_assert
@@ -173,11 +231,14 @@ void exp_print_tree
   (etree_type *);
 bfd_vma exp_get_vma
   (etree_type *, bfd_vma, char *);
-int exp_get_value_int
-  (etree_type *, int, char *);
+int exp_get_power
+  (etree_type *, char *);
 fill_type *exp_get_fill
   (etree_type *, fill_type *, char *);
 bfd_vma exp_get_abs_int
   (etree_type *, int, char *);
+void ldexp_init (void);
+void ldexp_finalize_syms (void);
+void ldexp_finish (void);
 
 #endif