1 /* ldexp.h - 2 Copyright 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2000, 2001, 2002, 3 2003, 2004, 2005 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, 51 Franklin Street - Fifth Floor, Boston, MA 20 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 enum { 36 etree_binary, 37 etree_trinary, 38 etree_unary, 39 etree_name, 40 etree_assign, 41 etree_provide, 42 etree_provided, 43 etree_value, 44 etree_assert, 45 etree_rel 46 } node_class; 47 } node_type; 48 49 typedef union etree_union { 50 node_type type; 51 struct { 52 node_type type; 53 union etree_union *lhs; 54 union etree_union *rhs; 55 } binary; 56 struct { 57 node_type type; 58 union etree_union *cond; 59 union etree_union *lhs; 60 union etree_union *rhs; 61 } trinary; 62 struct { 63 node_type type; 64 const char *dst; 65 union etree_union *src; 66 bfd_boolean hidden; 67 } assign; 68 struct { 69 node_type type; 70 union etree_union *child; 71 } unary; 72 struct { 73 node_type type; 74 const char *name; 75 } name; 76 struct { 77 node_type type; 78 bfd_vma value; 79 char *str; 80 } value; 81 struct { 82 node_type type; 83 asection *section; 84 bfd_vma value; 85 } rel; 86 struct { 87 node_type type; 88 union etree_union *child; 89 const char *message; 90 } assert_s; 91 } etree_type; 92 93 typedef enum { 94 lang_first_phase_enum, 95 lang_mark_phase_enum, 96 lang_allocating_phase_enum, 97 lang_final_phase_enum 98 } lang_phase_type; 99 100 struct ldexp_control { 101 /* Modify expression evaluation depending on this. */ 102 lang_phase_type phase; 103 104 /* Principally used for diagnostics. */ 105 bfd_boolean assigning_to_dot; 106 107 /* Working results. */ 108 etree_value_type result; 109 bfd_vma dot; 110 111 /* Current dot and section passed to ldexp folder. */ 112 bfd_vma *dotp; 113 asection *section; 114 115 /* State machine and results for DATASEG. */ 116 struct { 117 enum { 118 exp_dataseg_none, 119 exp_dataseg_align_seen, 120 exp_dataseg_relro_seen, 121 exp_dataseg_end_seen, 122 exp_dataseg_relro_adjust, 123 exp_dataseg_adjust 124 } phase; 125 126 bfd_vma base, min_base, relro_end, end, pagesize, maxpagesize; 127 } dataseg; 128 }; 129 130 extern struct ldexp_control expld; 131 132 /* A maps from a segment name to a base address. */ 133 typedef struct segment_struct { 134 /* The next segment in the linked list. */ 135 struct segment_struct *next; 136 /* The name of the sgement. */ 137 const char *name; 138 /* The base address for the segment. */ 139 bfd_vma value; 140 /* True if a SEGMENT_START directive corresponding to this segment 141 has been seen. */ 142 bfd_boolean used; 143 } segment_type; 144 145 /* The segments specified by the user on the command-line. */ 146 extern segment_type *segments; 147 148 typedef struct _fill_type fill_type; 149 150 etree_type *exp_intop 151 (bfd_vma); 152 etree_type *exp_bigintop 153 (bfd_vma, char *); 154 etree_type *exp_relop 155 (asection *, bfd_vma); 156 void exp_fold_tree 157 (etree_type *, asection *, bfd_vma *); 158 etree_type *exp_binop 159 (int, etree_type *, etree_type *); 160 etree_type *exp_trinop 161 (int,etree_type *, etree_type *, etree_type *); 162 etree_type *exp_unop 163 (int, etree_type *); 164 etree_type *exp_nameop 165 (int, const char *); 166 etree_type *exp_assop 167 (int, const char *, etree_type *); 168 etree_type *exp_provide 169 (const char *, etree_type *, bfd_boolean); 170 etree_type *exp_assert 171 (etree_type *, const char *); 172 void exp_print_tree 173 (etree_type *); 174 bfd_vma exp_get_vma 175 (etree_type *, bfd_vma, char *); 176 int exp_get_value_int 177 (etree_type *, int, char *); 178 fill_type *exp_get_fill 179 (etree_type *, fill_type *, char *); 180 bfd_vma exp_get_abs_int 181 (etree_type *, int, char *); 182 183 #endif 184