| 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 | } assign; |
| 67 | struct { |
| 68 | node_type type; |
| 69 | union etree_union *child; |
| 70 | } unary; |
| 71 | struct { |
| 72 | node_type type; |
| 73 | const char *name; |
| 74 | } name; |
| 75 | struct { |
| 76 | node_type type; |
| 77 | bfd_vma value; |
| 78 | char *str; |
| 79 | } value; |
| 80 | struct { |
| 81 | node_type type; |
| 82 | asection *section; |
| 83 | bfd_vma value; |
| 84 | } rel; |
| 85 | struct { |
| 86 | node_type type; |
| 87 | union etree_union *child; |
| 88 | const char *message; |
| 89 | } assert_s; |
| 90 | } etree_type; |
| 91 | |
| 92 | typedef enum { |
| 93 | lang_first_phase_enum, |
| 94 | lang_mark_phase_enum, |
| 95 | lang_allocating_phase_enum, |
| 96 | lang_final_phase_enum |
| 97 | } lang_phase_type; |
| 98 | |
| 99 | struct ldexp_control { |
| 100 | /* Modify expression evaluation depending on this. */ |
| 101 | lang_phase_type phase; |
| 102 | |
| 103 | /* Principally used for diagnostics. */ |
| 104 | bfd_boolean assigning_to_dot; |
| 105 | |
| 106 | /* Working results. */ |
| 107 | etree_value_type result; |
| 108 | bfd_vma dot; |
| 109 | |
| 110 | /* Current dot and section passed to ldexp folder. */ |
| 111 | bfd_vma *dotp; |
| 112 | asection *section; |
| 113 | |
| 114 | /* State machine and results for DATASEG. */ |
| 115 | struct { |
| 116 | enum { |
| 117 | exp_dataseg_none, |
| 118 | exp_dataseg_align_seen, |
| 119 | exp_dataseg_relro_seen, |
| 120 | exp_dataseg_end_seen, |
| 121 | exp_dataseg_relro_adjust, |
| 122 | exp_dataseg_adjust |
| 123 | } phase; |
| 124 | |
| 125 | bfd_vma base, min_base, relro_end, end, pagesize, maxpagesize; |
| 126 | } dataseg; |
| 127 | }; |
| 128 | |
| 129 | extern struct ldexp_control expld; |
| 130 | |
| 131 | /* A maps from a segment name to a base address. */ |
| 132 | typedef struct segment_struct { |
| 133 | /* The next segment in the linked list. */ |
| 134 | struct segment_struct *next; |
| 135 | /* The name of the sgement. */ |
| 136 | const char *name; |
| 137 | /* The base address for the segment. */ |
| 138 | bfd_vma value; |
| 139 | /* True if a SEGMENT_START directive corresponding to this segment |
| 140 | has been seen. */ |
| 141 | bfd_boolean used; |
| 142 | } segment_type; |
| 143 | |
| 144 | /* The segments specified by the user on the command-line. */ |
| 145 | extern segment_type *segments; |
| 146 | |
| 147 | typedef struct _fill_type fill_type; |
| 148 | |
| 149 | etree_type *exp_intop |
| 150 | (bfd_vma); |
| 151 | etree_type *exp_bigintop |
| 152 | (bfd_vma, char *); |
| 153 | etree_type *exp_relop |
| 154 | (asection *, bfd_vma); |
| 155 | void exp_fold_tree |
| 156 | (etree_type *, asection *, bfd_vma *); |
| 157 | etree_type *exp_binop |
| 158 | (int, etree_type *, etree_type *); |
| 159 | etree_type *exp_trinop |
| 160 | (int,etree_type *, etree_type *, etree_type *); |
| 161 | etree_type *exp_unop |
| 162 | (int, etree_type *); |
| 163 | etree_type *exp_nameop |
| 164 | (int, const char *); |
| 165 | etree_type *exp_assop |
| 166 | (int, const char *, etree_type *); |
| 167 | etree_type *exp_provide |
| 168 | (const char *, etree_type *); |
| 169 | etree_type *exp_assert |
| 170 | (etree_type *, const char *); |
| 171 | void exp_print_tree |
| 172 | (etree_type *); |
| 173 | bfd_vma exp_get_vma |
| 174 | (etree_type *, bfd_vma, char *); |
| 175 | int exp_get_value_int |
| 176 | (etree_type *, int, char *); |
| 177 | fill_type *exp_get_fill |
| 178 | (etree_type *, fill_type *, char *); |
| 179 | bfd_vma exp_get_abs_int |
| 180 | (etree_type *, int, char *); |
| 181 | |
| 182 | #endif |