2 Copyright 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2000, 2001, 2002,
3 2003, 2004, 2005, 2007, 2011, 2012 Free Software Foundation, Inc.
5 This file is part of the GNU Binutils.
7 This program 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 3 of the License, or
10 (at your option) any later version.
12 This program 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.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
25 /* The result of an expression tree */
50 enum node_tree_enum node_class
;
53 typedef union etree_union
{
57 union etree_union
*lhs
;
58 union etree_union
*rhs
;
62 union etree_union
*cond
;
63 union etree_union
*lhs
;
64 union etree_union
*rhs
;
69 union etree_union
*src
;
75 union etree_union
*child
;
93 union etree_union
*child
;
98 /* Expression evaluation control. */
101 /* Parsing linker script. Will only return "valid" for expressions
102 that evaluate to a constant. */
103 lang_first_phase_enum
,
104 /* Prior to section sizing. */
105 lang_mark_phase_enum
,
106 /* During section sizing. */
107 lang_allocating_phase_enum
,
108 /* During assignment of symbol values when relaxation in progress. */
109 lang_assigning_phase_enum
,
110 /* Final assignment of symbol values. */
111 lang_final_phase_enum
114 union lang_statement_union
;
117 /* We step through the first four states here as we see the
118 associated linker script tokens. */
120 exp_dataseg_align_seen
,
121 exp_dataseg_relro_seen
,
122 exp_dataseg_end_seen
,
123 /* The last three states are final, and affect the value returned
124 by DATA_SEGMENT_ALIGN. */
125 exp_dataseg_relro_adjust
,
131 exp_dataseg_relro_none
,
132 exp_dataseg_relro_start
,
133 exp_dataseg_relro_end
,
136 struct ldexp_control
{
137 /* Modify expression evaluation depending on this. */
138 lang_phase_type phase
;
140 /* Principally used for diagnostics. */
141 bfd_boolean assigning_to_dot
;
142 /* If evaluating an assignment, the destination. Cleared if an
143 etree_name NAME matches this, to signal a self-assignment.
144 Note that an etree_name DEFINED does not clear this field, nor
145 does the false branch of a trinary expression. */
146 const char *assign_name
;
148 /* Working results. */
149 etree_value_type result
;
152 /* Current dot and section passed to ldexp folder. */
156 /* State machine and results for DATASEG. */
158 enum phase_enum phase
;
160 bfd_vma base
, min_base
, relro_end
, end
, pagesize
, maxpagesize
;
162 enum relro_enum relro
;
164 union lang_statement_union
*relro_start_stat
;
165 union lang_statement_union
*relro_end_stat
;
169 extern struct ldexp_control expld
;
171 /* A maps from a segment name to a base address. */
172 typedef struct segment_struct
{
173 /* The next segment in the linked list. */
174 struct segment_struct
*next
;
175 /* The name of the sgement. */
177 /* The base address for the segment. */
179 /* True if a SEGMENT_START directive corresponding to this segment
184 /* The segments specified by the user on the command-line. */
185 extern segment_type
*segments
;
187 typedef struct _fill_type fill_type
;
189 etree_type
*exp_intop
191 etree_type
*exp_bigintop
193 etree_type
*exp_relop
194 (asection
*, bfd_vma
);
196 (etree_type
*, asection
*, bfd_vma
*);
197 void exp_fold_tree_no_dot
199 etree_type
*exp_binop
200 (int, etree_type
*, etree_type
*);
201 etree_type
*exp_trinop
202 (int,etree_type
*, etree_type
*, etree_type
*);
205 etree_type
*exp_nameop
207 etree_type
*exp_assign
208 (const char *, etree_type
*, bfd_boolean
);
209 etree_type
*exp_defsym
210 (const char *, etree_type
*);
211 etree_type
*exp_provide
212 (const char *, etree_type
*, bfd_boolean
);
213 etree_type
*exp_assert
214 (etree_type
*, const char *);
218 (etree_type
*, bfd_vma
, char *);
219 int exp_get_value_int
220 (etree_type
*, int, char *);
221 fill_type
*exp_get_fill
222 (etree_type
*, fill_type
*, char *);
223 bfd_vma exp_get_abs_int
224 (etree_type
*, int, char *);