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;
74 union etree_union *child;
92 union etree_union *child;
97 /* Expression evaluation control. */
100 /* Parsing linker script. Will only return "valid" for expressions
101 that evaluate to a constant. */
102 lang_first_phase_enum,
103 /* Prior to section sizing. */
104 lang_mark_phase_enum,
105 /* During section sizing. */
106 lang_allocating_phase_enum,
107 /* During assignment of symbol values when relaxation in progress. */
108 lang_assigning_phase_enum,
109 /* Final assignment of symbol values. */
110 lang_final_phase_enum
113 union lang_statement_union;
116 /* We step through the first four states here as we see the
117 associated linker script tokens. */
119 exp_dataseg_align_seen,
120 exp_dataseg_relro_seen,
121 exp_dataseg_end_seen,
122 /* The last three states are final, and affect the value returned
123 by DATA_SEGMENT_ALIGN. */
124 exp_dataseg_relro_adjust,
130 exp_dataseg_relro_none,
131 exp_dataseg_relro_start,
132 exp_dataseg_relro_end,
135 struct ldexp_control {
136 /* Modify expression evaluation depending on this. */
137 lang_phase_type phase;
139 /* Principally used for diagnostics. */
140 bfd_boolean assigning_to_dot;
142 /* Working results. */
143 etree_value_type result;
146 /* Current dot and section passed to ldexp folder. */
150 /* State machine and results for DATASEG. */
152 enum phase_enum phase;
154 bfd_vma base, min_base, relro_end, end, pagesize, maxpagesize;
156 enum relro_enum relro;
158 union lang_statement_union *relro_start_stat;
159 union lang_statement_union *relro_end_stat;
163 extern struct ldexp_control expld;
165 /* A maps from a segment name to a base address. */
166 typedef struct segment_struct {
167 /* The next segment in the linked list. */
168 struct segment_struct *next;
169 /* The name of the sgement. */
171 /* The base address for the segment. */
173 /* True if a SEGMENT_START directive corresponding to this segment
178 /* The segments specified by the user on the command-line. */
179 extern segment_type *segments;
181 typedef struct _fill_type fill_type;
183 etree_type *exp_intop
185 etree_type *exp_bigintop
187 etree_type *exp_relop
188 (asection *, bfd_vma);
190 (etree_type *, asection *, bfd_vma *);
191 void exp_fold_tree_no_dot
193 etree_type *exp_binop
194 (int, etree_type *, etree_type *);
195 etree_type *exp_trinop
196 (int,etree_type *, etree_type *, etree_type *);
199 etree_type *exp_nameop
201 etree_type *exp_assign
202 (const char *, etree_type *);
203 etree_type *exp_defsym
204 (const char *, etree_type *);
205 etree_type *exp_provide
206 (const char *, etree_type *, bfd_boolean);
207 etree_type *exp_assert
208 (etree_type *, const char *);
212 (etree_type *, bfd_vma, char *);
213 int exp_get_value_int
214 (etree_type *, int, char *);
215 fill_type *exp_get_fill
216 (etree_type *, fill_type *, char *);
217 bfd_vma exp_get_abs_int
218 (etree_type *, int, char *);