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 */ 26typedef struct { 27 bfd_vma value; 28 char *str; 29 asection *section; 30 bfd_boolean valid_p; 31} etree_value_type; 32 33typedef 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 50typedef 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 94typedef 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 101struct ldexp_control { 102 /* Modify expression evaluation depending on this. */ 103 lang_phase_type phase; 104 105 /* Principally used for diagnostics. */ 106 bfd_boolean assigning_to_dot; 107 108 /* Working results. */ 109 etree_value_type result; 110 bfd_vma dot; 111 112 /* Current dot and section passed to ldexp folder. */ 113 bfd_vma *dotp; 114 asection *section; 115 116 /* State machine and results for DATASEG. */ 117 struct { 118 enum { 119 exp_dataseg_none, 120 exp_dataseg_align_seen, 121 exp_dataseg_relro_seen, 122 exp_dataseg_end_seen, 123 exp_dataseg_relro_adjust, 124 exp_dataseg_adjust 125 } phase; 126 127 bfd_vma base, min_base, relro_end, end, pagesize, maxpagesize; 128 } dataseg; 129}; 130 131extern struct ldexp_control expld; 132 133/* A maps from a segment name to a base address. */ 134typedef struct segment_struct { 135 /* The next segment in the linked list. */ 136 struct segment_struct *next; 137 /* The name of the sgement. */ 138 const char *name; 139 /* The base address for the segment. */ 140 bfd_vma value; 141 /* True if a SEGMENT_START directive corresponding to this segment 142 has been seen. */ 143 bfd_boolean used; 144} segment_type; 145 146/* The segments specified by the user on the command-line. */ 147extern segment_type *segments; 148 149typedef struct _fill_type fill_type; 150 151etree_type *exp_intop 152 (bfd_vma); 153etree_type *exp_bigintop 154 (bfd_vma, char *); 155etree_type *exp_relop 156 (asection *, bfd_vma); 157void exp_fold_tree 158 (etree_type *, asection *, bfd_vma *); 159etree_type *exp_binop 160 (int, etree_type *, etree_type *); 161etree_type *exp_trinop 162 (int,etree_type *, etree_type *, etree_type *); 163etree_type *exp_unop 164 (int, etree_type *); 165etree_type *exp_nameop 166 (int, const char *); 167etree_type *exp_assop 168 (int, const char *, etree_type *); 169etree_type *exp_provide 170 (const char *, etree_type *, bfd_boolean); 171etree_type *exp_assert 172 (etree_type *, const char *); 173void exp_print_tree 174 (etree_type *); 175bfd_vma exp_get_vma 176 (etree_type *, bfd_vma, char *); 177int exp_get_value_int 178 (etree_type *, int, char *); 179fill_type *exp_get_fill 180 (etree_type *, fill_type *, char *); 181bfd_vma exp_get_abs_int 182 (etree_type *, int, char *); 183 184#endif 185