1/* ldexp.h - 2 Copyright 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2000, 2001, 2002, 3 2003, 2004, 2005, 2007, 2011 Free Software Foundation, Inc. 4 5 This file is part of the GNU Binutils. 6 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. 11 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. 16 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. */ 21 22#ifndef LDEXP_H 23#define LDEXP_H 24 25/* The result of an expression tree */ 26typedef struct { 27 bfd_vma value; 28 char *str; 29 asection *section; 30 bfd_boolean valid_p; 31} etree_value_type; 32 33enum node_tree_enum { 34 etree_binary, 35 etree_trinary, 36 etree_unary, 37 etree_name, 38 etree_assign, 39 etree_provide, 40 etree_provided, 41 etree_value, 42 etree_assert, 43 etree_rel 44}; 45 46typedef struct { 47 int node_code; 48 unsigned int lineno; 49 enum node_tree_enum node_class; 50} node_type; 51 52typedef union etree_union { 53 node_type type; 54 struct { 55 node_type type; 56 union etree_union *lhs; 57 union etree_union *rhs; 58 } binary; 59 struct { 60 node_type type; 61 union etree_union *cond; 62 union etree_union *lhs; 63 union etree_union *rhs; 64 } trinary; 65 struct { 66 node_type type; 67 const char *dst; 68 union etree_union *src; 69 bfd_boolean hidden; 70 } assign; 71 struct { 72 node_type type; 73 union etree_union *child; 74 } unary; 75 struct { 76 node_type type; 77 const char *name; 78 } name; 79 struct { 80 node_type type; 81 bfd_vma value; 82 char *str; 83 } value; 84 struct { 85 node_type type; 86 asection *section; 87 bfd_vma value; 88 } rel; 89 struct { 90 node_type type; 91 union etree_union *child; 92 const char *message; 93 } assert_s; 94} etree_type; 95 96typedef enum { 97 lang_first_phase_enum, 98 lang_mark_phase_enum, 99 lang_allocating_phase_enum, 100 lang_assigning_phase_enum, 101 lang_final_phase_enum 102} lang_phase_type; 103 104union lang_statement_union; 105 106enum phase_enum { 107 /* We step through the first four states here as we see the 108 associated linker script tokens. */ 109 exp_dataseg_none, 110 exp_dataseg_align_seen, 111 exp_dataseg_relro_seen, 112 exp_dataseg_end_seen, 113 /* The last three states are final, and affect the value returned 114 by DATA_SEGMENT_ALIGN. */ 115 exp_dataseg_relro_adjust, 116 exp_dataseg_adjust, 117 exp_dataseg_done 118}; 119 120enum relro_enum { 121 exp_dataseg_relro_none, 122 exp_dataseg_relro_start, 123 exp_dataseg_relro_end, 124}; 125 126struct ldexp_control { 127 /* Modify expression evaluation depending on this. */ 128 lang_phase_type phase; 129 130 /* Principally used for diagnostics. */ 131 bfd_boolean assigning_to_dot; 132 133 /* Working results. */ 134 etree_value_type result; 135 bfd_vma dot; 136 137 /* Current dot and section passed to ldexp folder. */ 138 bfd_vma *dotp; 139 asection *section; 140 141 /* State machine and results for DATASEG. */ 142 struct { 143 enum phase_enum phase; 144 145 bfd_vma base, min_base, relro_end, end, pagesize, maxpagesize; 146 147 enum relro_enum relro; 148 149 union lang_statement_union *relro_start_stat; 150 union lang_statement_union *relro_end_stat; 151 } dataseg; 152}; 153 154extern struct ldexp_control expld; 155 156/* A maps from a segment name to a base address. */ 157typedef struct segment_struct { 158 /* The next segment in the linked list. */ 159 struct segment_struct *next; 160 /* The name of the sgement. */ 161 const char *name; 162 /* The base address for the segment. */ 163 bfd_vma value; 164 /* True if a SEGMENT_START directive corresponding to this segment 165 has been seen. */ 166 bfd_boolean used; 167} segment_type; 168 169/* The segments specified by the user on the command-line. */ 170extern segment_type *segments; 171 172typedef struct _fill_type fill_type; 173 174etree_type *exp_intop 175 (bfd_vma); 176etree_type *exp_bigintop 177 (bfd_vma, char *); 178etree_type *exp_relop 179 (asection *, bfd_vma); 180void exp_fold_tree 181 (etree_type *, asection *, bfd_vma *); 182void exp_fold_tree_no_dot 183 (etree_type *); 184etree_type *exp_binop 185 (int, etree_type *, etree_type *); 186etree_type *exp_trinop 187 (int,etree_type *, etree_type *, etree_type *); 188etree_type *exp_unop 189 (int, etree_type *); 190etree_type *exp_nameop 191 (int, const char *); 192etree_type *exp_assign 193 (const char *, etree_type *); 194etree_type *exp_defsym 195 (const char *, etree_type *); 196etree_type *exp_provide 197 (const char *, etree_type *, bfd_boolean); 198etree_type *exp_assert 199 (etree_type *, const char *); 200void exp_print_tree 201 (etree_type *); 202bfd_vma exp_get_vma 203 (etree_type *, bfd_vma, char *); 204int exp_get_value_int 205 (etree_type *, int, char *); 206fill_type *exp_get_fill 207 (etree_type *, fill_type *, char *); 208bfd_vma exp_get_abs_int 209 (etree_type *, int, char *); 210 211#endif 212