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339
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1 /*
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2 lwlink.h
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3 Copyright © 2009 William Astle
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4
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5 This file is part of LWLINK.
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6
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7 LWLINK is free software: you can redistribute it and/or modify it under the
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8 terms of the GNU General Public License as published by the Free Software
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9 Foundation, either version 3 of the License, or (at your option) any later
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10 version.
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11
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12 This program is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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15 more details.
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16
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17 You should have received a copy of the GNU General Public License along with
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18 this program. If not, see <http://www.gnu.org/licenses/>.
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19
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20 Contains the main defs used by the linker
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21 */
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22
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23
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24 #ifndef __lwlink_h_seen__
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25 #define __lwlink_h_seen__
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26
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27 #include "expr.h"
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28
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29 #define OUTPUT_DECB 0 // DECB multirecord format
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30 #define OUTPUT_RAW 1 // raw sequence of bytes
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31 #define OUTPUT_LWEX0 2 // LWOS LWEX binary version 0
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32
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33 typedef struct symtab_s symtab_t;
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34 struct symtab_s
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35 {
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36 unsigned char *sym; // symbol name
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37 int offset; // local offset
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38 // int realval; // resolved value
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39 symtab_t *next; // next symbol
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40 };
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41
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42 #define RELOC_NORM 0 // all default (16 bit)
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43 #define RELOC_8BIT 1 // only use the low 8 bits for the reloc
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44 typedef struct reloc_s reloc_t;
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45 struct reloc_s
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46 {
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47 int offset; // where in the section
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48 int flags; // flags for the relocation
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49 lw_expr_stack_t *expr; // the expression to calculate it
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50 reloc_t *next; // ptr to next relocation
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51 };
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52
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53 typedef struct fileinfo_s fileinfo_t;
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54
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55 #define SECTION_BSS 1
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56 typedef struct
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57 {
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58 unsigned char *name; // name of the section
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59 int flags; // section flags
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60 int codesize; // size of the code
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61 unsigned char *code; // pointer to the code
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62 int loadaddress; // the actual load address of the section
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63 int processed; // was the section processed yet?
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64
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65 symtab_t *localsyms; // local symbol table
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66 symtab_t *exportedsyms; // exported symbols table
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67
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68 reloc_t *incompletes; // table of incomplete references
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69
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70 fileinfo_t *file; // the file we are in
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71 } section_t;
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72
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73 struct fileinfo_s
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74 {
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75 char *filename;
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76 unsigned char *filedata;
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77 long filesize;
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78 section_t *sections;
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79 int nsections;
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80 int islib; // set to true if the file is a "-l" option
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81
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82 int forced; // set to true if the file is a "forced" include
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83
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84 // "sub" files (like in archives or libraries)
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85 int nsubs;
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86 fileinfo_t **subs;
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87 fileinfo_t *parent;
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88 };
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89
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90 struct section_list
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91 {
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92 section_t *ptr; // ptr to section structure
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93 int forceaddr; // was this force to an address by the link script?
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94 };
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95
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96 #ifndef __link_c_seen__
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97 extern struct section_list *sectlist;
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98 extern int nsects;
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99 #endif
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100
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101
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102 #ifndef __lwlink_c_seen__
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103
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104 extern int debug_level;
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105 extern int outformat;
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106 extern char *outfile;
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107 extern int ninputfiles;
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108 extern fileinfo_t **inputfiles;
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109 extern char *scriptfile;
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110
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111 extern int nlibdirs;
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112 extern char **libdirs;
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113
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114 extern int nscriptls;
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115 extern char **scriptls;
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116
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117 extern int symerr;
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118
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119 extern char *map_file;
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120
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121 #define __lwlink_E__ extern
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122 #else
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123 #define __lwlink_E__
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124 #endif // __lwlink_c_seen__
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125
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126 __lwlink_E__ void add_input_file(char *fn);
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127 __lwlink_E__ void add_input_library(char *fn);
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128 __lwlink_E__ void add_library_search(char *fn);
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129 __lwlink_E__ void add_section_base(char *fn);
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130
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131 #undef __lwlink_E__
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132
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133 struct scriptline_s
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134 {
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135 char *sectname; // name of section, NULL for wildcard
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136 int loadat; // address to load at (or -1)
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137 int noflags; // flags to NOT have
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138 int yesflags; // flags to HAVE
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139 };
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140
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141 typedef struct
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142 {
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143 int nlines; // number of lines in the script
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144 struct scriptline_s *lines; // the parsed script lines (section)
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145 int padsize; // the size to pad to, -1 for none
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146 char *execsym; // entry point symbol
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147 int execaddr; // execution address (entry point)
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148 int stacksize; // stack size
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149 } linkscript_t;
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150
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151 #ifndef __script_c_seen__
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152 extern linkscript_t linkscript;
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153 #endif
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154
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155 #endif //__lwlink_h_seen__
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