1 /* ldexp.h - 2 Copyright 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2000, 2001, 2002, 3 2003, 2004, 2005, 2007 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 */ 26 typedef struct { 27 bfd_vma value; 28 char *str; 29 asection *section; 30 bfd_boolean valid_p; 31 } etree_value_type; 32 33 typedef struct { 34 int node_code; 35 unsigned int lineno; 36 enum { 37 etree_binary, 38 etree_trinary, 39 etree_unary, 40 etree_name, 41 etree_assign, 42 etree_provide, 43 etree_provided, 44 etree_value, 45 etree_assert, 46 etree_rel 47 } node_class; 48 } node_type; 49 50 typedef union etree_union { 51 node_type type; 52 struct { 53 node_type type; 54 union etree_union *lhs; 55 union etree_union *rhs; 56 } binary; 57 struct { 58 node_type type; 59 union etree_union *cond; 60 union etree_union *lhs; 61 union etree_union *rhs; 62 } trinary; 63 struct { 64 node_type type; 65 const char *dst; 66 union etree_union *src; 67 bfd_boolean hidden; 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 typedef enum { 95 lang_first_phase_enum, 96 lang_mark_phase_enum, 97 lang_allocating_phase_enum, 98 lang_final_phase_enum 99 } lang_phase_type; 100 101 union lang_statement_union; 102 103 struct ldexp_control { 104 /* Modify expression evaluation depending on this. */ 105 lang_phase_type phase; 106 107 /* Principally used for diagnostics. */ 108 bfd_boolean assigning_to_dot; 109 110 /* Working results. */ 111 etree_value_type result; 112 bfd_vma dot; 113 114 /* Current dot and section passed to ldexp folder. */ 115 bfd_vma *dotp; 116 asection *section; 117 118 /* State machine and results for DATASEG. */ 119 struct { 120 enum { 121 exp_dataseg_none, 122 exp_dataseg_align_seen, 123 exp_dataseg_relro_seen, 124 exp_dataseg_end_seen, 125 exp_dataseg_relro_adjust, 126 exp_dataseg_adjust 127 } phase; 128 129 bfd_vma base, min_base, relro_end, end, pagesize, maxpagesize; 130 131 enum { 132 exp_dataseg_relro_none, 133 exp_dataseg_relro_start, 134 exp_dataseg_relro_end, 135 } relro; 136 137 union lang_statement_union *relro_start_stat; 138 union lang_statement_union *relro_end_stat; 139 } dataseg; 140 }; 141 142 extern struct ldexp_control expld; 143 144 /* A maps from a segment name to a base address. */ 145 typedef struct segment_struct { 146 /* The next segment in the linked list. */ 147 struct segment_struct *next; 148 /* The name of the sgement. */ 149 const char *name; 150 /* The base address for the segment. */ 151 bfd_vma value; 152 /* True if a SEGMENT_START directive corresponding to this segment 153 has been seen. */ 154 bfd_boolean used; 155 } segment_type; 156 157 /* The segments specified by the user on the command-line. */ 158 extern segment_type *segments; 159 160 typedef struct _fill_type fill_type; 161 162 etree_type *exp_intop 163 (bfd_vma); 164 etree_type *exp_bigintop 165 (bfd_vma, char *); 166 etree_type *exp_relop 167 (asection *, bfd_vma); 168 void exp_fold_tree 169 (etree_type *, asection *, bfd_vma *); 170 etree_type *exp_binop 171 (int, etree_type *, etree_type *); 172 etree_type *exp_trinop 173 (int,etree_type *, etree_type *, etree_type *); 174 etree_type *exp_unop 175 (int, etree_type *); 176 etree_type *exp_nameop 177 (int, const char *); 178 etree_type *exp_assop 179 (int, const char *, etree_type *); 180 etree_type *exp_provide 181 (const char *, etree_type *, bfd_boolean); 182 etree_type *exp_assert 183 (etree_type *, const char *); 184 void exp_print_tree 185 (etree_type *); 186 bfd_vma exp_get_vma 187 (etree_type *, bfd_vma, char *); 188 int exp_get_value_int 189 (etree_type *, int, char *); 190 fill_type *exp_get_fill 191 (etree_type *, fill_type *, char *); 192 bfd_vma exp_get_abs_int 193 (etree_type *, int, char *); 194 195 #endif 196