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339
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1 /*
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2 main.c
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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
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21 Implements the program startup code
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22
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23 */
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24
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25 #include <config.h>
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26
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27 #include <argp.h>
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28 #include <errno.h>
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29 #include <stdio.h>
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30 #include <stdlib.h>
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31 #include <unistd.h>
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32
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33 #include "lwlink.h"
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34
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35 char *program_name;
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36
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37 // command line option handling
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38 const char *argp_program_version = "LWLINK from " PACKAGE_STRING;
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39 const char *argp_program_bug_address = PACKAGE_BUGREPORT;
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40
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41 static error_t parse_opts(int key, char *arg, struct argp_state *state)
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42 {
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43 switch (key)
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44 {
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45 case 'o':
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46 // output
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47 outfile = arg;
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48 break;
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49
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50 case 's':
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51 // script file
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52 scriptfile = arg;
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53 break;
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54
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55 case 'd':
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56 // debug
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57 debug_level++;
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58 break;
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59
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60 case 'b':
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61 // decb output
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62 outformat = OUTPUT_DECB;
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63 break;
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64
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65 case 'r':
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66 // raw binary output
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67 outformat = OUTPUT_RAW;
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68 break;
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69
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70 case 'f':
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71 // output format
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72 if (!strcasecmp(arg, "decb"))
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73 outformat = OUTPUT_DECB;
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74 else if (!strcasecmp(arg, "raw"))
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75 outformat = OUTPUT_RAW;
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76 else if (!strcasecmp(arg, "lwex0") || !strcasecmp(arg, "lwex"))
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77 outformat = OUTPUT_LWEX0;
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78 else
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79 {
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80 fprintf(stderr, "Invalid output format: %s\n", arg);
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81 exit(1);
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82 }
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83 break;
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84 case ARGP_KEY_END:
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85 // done; sanity check
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86 if (!outfile)
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87 outfile = "a.out";
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88 break;
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89
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90 case 'l':
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91 add_input_library(arg);
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92 break;
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93
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94 case 'L':
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95 add_library_search(arg);
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96 break;
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97
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98 case 0x100:
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99 add_section_base(arg);
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100 break;
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101
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102 case 'm':
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103 map_file = arg;
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104 break;
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105
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106 case ARGP_KEY_ARG:
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107 add_input_file(arg);
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108 break;
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109
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110 default:
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111 return ARGP_ERR_UNKNOWN;
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112 }
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113 return 0;
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114 }
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115
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116 static struct argp_option options[] =
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117 {
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118 { "output", 'o', "FILE", 0,
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119 "Output to FILE"},
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120 { "debug", 'd', 0, 0,
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121 "Set debug mode"},
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122 { "format", 'f', "TYPE", 0,
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123 "Select output format: decb, raw, lwex"},
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124 { "decb", 'b', 0, 0,
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125 "Generate DECB .bin format output, equivalent of --format=decb"},
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126 { "raw", 'r', 0, 0,
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127 "Generate raw binary format output, equivalent of --format=raw"},
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128 { "script", 's', "FILE", 0,
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129 "Specify the linking script (overrides the built in defaults)"},
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130 { "library", 'l', "LIBSPEC", 0,
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131 "Read library libLIBSPEC.a from the search path" },
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132 { "library-path", 'L', "DIR", 0,
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133 "Add DIR to the library search path" },
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134 { "section-base", 0x100, "SECT=BASE", 0,
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135 "Load section SECT at BASE" },
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136 { "map", 'm', "FILE", 0,
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137 "Output informaiton about the link" },
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138 { 0 }
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139 };
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140
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141 static struct argp argp =
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142 {
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143 options,
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144 parse_opts,
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145 "<input file> ...",
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146 "LWLINK, a HD6309 and MC6809 cross-linker"
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147 };
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148
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149 extern void read_files(void);
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150 extern void setup_script(void);
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151 extern void resolve_files(void);
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152 extern void resolve_sections(void);
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153 extern void resolve_references(void);
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154 extern void do_output(void);
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155 extern void display_map(void);
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156
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157 // main function; parse command line, set up assembler state, and run the
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158 // assembler on the first file
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159 int main(int argc, char **argv)
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160 {
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161 program_name = argv[0];
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162
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163 argp_parse(&argp, argc, argv, 0, 0, NULL);
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164 if (ninputfiles == 0)
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165 {
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166 fprintf(stderr, "No input files\n");
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167 exit(1);
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168 }
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169
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170 unlink(outfile);
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171
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172 // handle the linker script
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173 setup_script();
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174
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175 // read the input files
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176 read_files();
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177
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178 // trace unresolved references and determine which non-forced
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179 // objects must be included
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180 resolve_files();
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181
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182 // resolve section bases and section order
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183 resolve_sections();
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184
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185 // resolve incomplete references
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186 resolve_references();
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187
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188 // do the actual output
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189 do_output();
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190
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191 // display/output the link map
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192 if (map_file)
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193 display_map();
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194
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195 exit(0);
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196 }
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