ld/ldexp.h

   1 /* ldexp.h -
   2    Copyright 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2000, 2001, 2002,
   3    2003, 2004 Free Software Foundation, Inc.
   4
   5    This file is part of GLD, the Gnu Linker.
   6
   7    GLD is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2, or (at your option)
  10    any later version.
  11
  12    GLD is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GLD; see the file COPYING.  If not, write to the Free
  19    Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  20    02111-1307, USA.  */
  21
  22 #ifndef LDEXP_H
  23 #define LDEXP_H
  24
  25 /* The result of an expression tree */
  26 typedef struct {
  27   bfd_vma value;
  28   char *str;
  29   struct lang_output_section_statement_struct *section;
  30   bfd_boolean valid_p;
  31 } etree_value_type;
  32
  33 typedef struct {
  34   int node_code;
  35   enum {
  36     etree_binary,
  37     etree_trinary,
  38     etree_unary,
  39     etree_name,
  40     etree_assign,
  41     etree_provide,
  42     etree_provided,
  43     etree_undef,
  44     etree_unspec,
  45     etree_value,
  46     etree_assert,
  47     etree_rel
  48   } node_class;
  49 } node_type;
  50
  51 typedef union etree_union {
  52   node_type type;
  53   struct {
  54     node_type type;
  55     union etree_union *lhs;
  56     union etree_union *rhs;
  57   } binary;
  58   struct {
  59     node_type type;
  60     union etree_union *cond;
  61     union etree_union *lhs;
  62     union etree_union *rhs;
  63   } trinary;
  64   struct {
  65     node_type type;
  66     const char *dst;
  67     union etree_union *src;
  68   } assign;
  69   struct {
  70     node_type type;
  71     union etree_union *child;
  72   } unary;
  73   struct {
  74     node_type type;
  75     const char *name;
  76   } name;
  77   struct {
  78     node_type type;
  79     bfd_vma value;
  80     char *str;
  81   } value;
  82   struct {
  83     node_type type;
  84     asection *section;
  85     bfd_vma value;
  86   } rel;
  87   struct {
  88     node_type type;
  89     union etree_union *child;
  90     const char *message;
  91   } assert_s;
  92 } etree_type;
  93
  94 extern struct exp_data_seg {
  95   enum {
  96     exp_dataseg_none,
  97     exp_dataseg_align_seen,
  98     exp_dataseg_relro_seen,
  99     exp_dataseg_end_seen,
 100     exp_dataseg_relro_adjust,
 101     exp_dataseg_adjust
 102   } phase;
 103   bfd_vma base, relro_end, end, pagesize;
 104 } exp_data_seg;
 105
 106 /* A maps from a segment name to a base address.  */
 107 typedef struct segment_struct {
 108   /* The next segment in the linked list.  */
 109   struct segment_struct *next;
 110   /* The name of the sgement.  */
 111   const char *name;
 112   /* The base address for the segment.  */
 113   bfd_vma value;
 114   /* True if a SEGMENT_START directive corresponding to this segment
 115      has been seen.  */
 116   bfd_boolean used;
 117 } segment_type;
 118
 119 /* The segments specified by the user on the command-line.  */
 120 extern segment_type *segments;
 121
 122 typedef struct _fill_type fill_type;
 123
 124 etree_type *exp_intop
 125   (bfd_vma);
 126 etree_type *exp_bigintop
 127   (bfd_vma, char *);
 128 etree_type *exp_relop
 129   (asection *, bfd_vma);
 130 etree_value_type invalid
 131   (void);
 132 etree_value_type exp_fold_tree
 133   (etree_type *, struct lang_output_section_statement_struct *,
 134    lang_phase_type, bfd_vma, bfd_vma *);
 135 etree_type *exp_binop
 136   (int, etree_type *, etree_type *);
 137 etree_type *exp_trinop
 138   (int,etree_type *, etree_type *, etree_type *);
 139 etree_type *exp_unop
 140   (int, etree_type *);
 141 etree_type *exp_nameop
 142   (int, const char *);
 143 etree_type *exp_assop
 144   (int, const char *, etree_type *);
 145 etree_type *exp_provide
 146   (const char *, etree_type *);
 147 etree_type *exp_assert
 148   (etree_type *, const char *);
 149 void exp_print_tree
 150   (etree_type *);
 151 bfd_vma exp_get_vma
 152   (etree_type *, bfd_vma, char *, lang_phase_type);
 153 int exp_get_value_int
 154   (etree_type *, int, char *, lang_phase_type);
 155 fill_type *exp_get_fill
 156   (etree_type *, fill_type *, char *, lang_phase_type);
 157 bfd_vma exp_get_abs_int
 158   (etree_type *, int, char *, lang_phase_type);
 159
 160 #endif