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annotate lwlink/main.c @ 0:2c24602be78f

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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
author lost@l-w.ca
date Wed, 19 Jan 2011 22:27:17 -0700
parents
children 7317fbe024af
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2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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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 <argp.h>
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26 #include <errno.h>
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27 #include <stdio.h>
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28 #include <stdlib.h>
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29 #include <unistd.h>
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30
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31 #include "lwlink.h"
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32
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33 char *program_name;
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34
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35 // command line option handling
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36 const char *argp_program_version = "LWLINK from " PACKAGE_STRING;
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37 const char *argp_program_bug_address = PACKAGE_BUGREPORT;
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38
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39 static error_t parse_opts(int key, char *arg, struct argp_state *state)
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40 {
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41 switch (key)
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42 {
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43 case 'o':
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44 // output
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45 outfile = arg;
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46 break;
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47
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48 case 's':
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49 // script file
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50 scriptfile = arg;
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51 break;
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52
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53 case 'd':
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54 // debug
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55 debug_level++;
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56 break;
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57
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58 case 'b':
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59 // decb output
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60 outformat = OUTPUT_DECB;
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61 break;
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62
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63 case 'r':
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64 // raw binary output
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65 outformat = OUTPUT_RAW;
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66 break;
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67
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68 case 'f':
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69 // output format
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70 if (!strcasecmp(arg, "decb"))
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71 outformat = OUTPUT_DECB;
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72 else if (!strcasecmp(arg, "raw"))
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73 outformat = OUTPUT_RAW;
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74 else if (!strcasecmp(arg, "lwex0") || !strcasecmp(arg, "lwex"))
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75 outformat = OUTPUT_LWEX0;
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76 else
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77 {
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78 fprintf(stderr, "Invalid output format: %s\n", arg);
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79 exit(1);
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80 }
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81 break;
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82 case ARGP_KEY_END:
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83 // done; sanity check
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84 if (!outfile)
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85 outfile = "a.out";
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86 break;
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87
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88 case 'l':
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89 add_input_library(arg);
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90 break;
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91
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92 case 'L':
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93 add_library_search(arg);
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94 break;
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95
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96 case 0x100:
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97 add_section_base(arg);
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98 break;
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99
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100 case 'm':
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101 map_file = arg;
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102 break;
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103
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104 case ARGP_KEY_ARG:
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105 add_input_file(arg);
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106 break;
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107
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108 default:
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109 return ARGP_ERR_UNKNOWN;
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110 }
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111 return 0;
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112 }
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113
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114 static struct argp_option options[] =
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115 {
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116 { "output", 'o', "FILE", 0,
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117 "Output to FILE"},
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118 { "debug", 'd', 0, 0,
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119 "Set debug mode"},
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120 { "format", 'f', "TYPE", 0,
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121 "Select output format: decb, raw, lwex"},
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122 { "decb", 'b', 0, 0,
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123 "Generate DECB .bin format output, equivalent of --format=decb"},
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124 { "raw", 'r', 0, 0,
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125 "Generate raw binary format output, equivalent of --format=raw"},
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126 { "script", 's', "FILE", 0,
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127 "Specify the linking script (overrides the built in defaults)"},
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128 { "library", 'l', "LIBSPEC", 0,
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129 "Read library libLIBSPEC.a from the search path" },
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130 { "library-path", 'L', "DIR", 0,
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131 "Add DIR to the library search path" },
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132 { "section-base", 0x100, "SECT=BASE", 0,
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133 "Load section SECT at BASE" },
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134 { "map", 'm', "FILE", 0,
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135 "Output informaiton about the link" },
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136 { 0 }
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137 };
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138
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139 static struct argp argp =
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140 {
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141 options,
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142 parse_opts,
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143 "<input file> ...",
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144 "LWLINK, a HD6309 and MC6809 cross-linker"
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145 };
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146
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147 extern void read_files(void);
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148 extern void setup_script(void);
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149 extern void resolve_files(void);
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150 extern void resolve_sections(void);
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151 extern void resolve_references(void);
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152 extern void do_output(void);
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153 extern void display_map(void);
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154
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155 // main function; parse command line, set up assembler state, and run the
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156 // assembler on the first file
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157 int main(int argc, char **argv)
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158 {
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159 program_name = argv[0];
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160
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161 argp_parse(&argp, argc, argv, 0, 0, NULL);
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162 if (ninputfiles == 0)
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163 {
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164 fprintf(stderr, "No input files\n");
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165 exit(1);
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166 }
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167
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168 unlink(outfile);
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169
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170 // handle the linker script
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171 setup_script();
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172
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173 // read the input files
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174 read_files();
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175
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176 // trace unresolved references and determine which non-forced
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177 // objects must be included
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178 resolve_files();
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179
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180 // resolve section bases and section order
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181 resolve_sections();
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182
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183 // resolve incomplete references
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184 resolve_references();
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185
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186 // do the actual output
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187 do_output();
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188
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189 // display/output the link map
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190 if (map_file)
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191 display_map();
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192
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193 exit(0);
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194 }