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annotate lwlink/main.c @ 157:4682460aed00

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Correct bug with handling symbol resolution and constant section handling
author lost@l-w.ca
date Sun, 28 Aug 2011 11:45:38 -0600
parents 08fb11004df9
children 606123758641
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
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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 <errno.h>
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26 #include <stdio.h>
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27 #include <stdlib.h>
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28 #include <unistd.h>
2
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29 #include <string.h>
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30
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31 #include <lw_cmdline.h>
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32
0
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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 #define PROGVER "lwlink from " PACKAGE_STRING
0
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39
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40 static int parse_opts(int key, char *arg, void *state)
0
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41 {
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42 switch (key)
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43 {
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44 case 'o':
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45 // output
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46 outfile = arg;
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47 break;
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48
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49 case 's':
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50 // script file
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51 scriptfile = arg;
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52 break;
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53
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54 case 'd':
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55 // debug
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56 debug_level++;
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57 break;
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58
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59 case 'b':
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60 // decb output
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61 outformat = OUTPUT_DECB;
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62 break;
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63
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64 case 'r':
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65 // raw binary output
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66 outformat = OUTPUT_RAW;
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67 break;
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68
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69 case 'f':
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70 // output format
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71 if (!strcasecmp(arg, "decb"))
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72 outformat = OUTPUT_DECB;
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73 else if (!strcasecmp(arg, "raw"))
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74 outformat = OUTPUT_RAW;
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75 else if (!strcasecmp(arg, "lwex0") || !strcasecmp(arg, "lwex"))
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76 outformat = OUTPUT_LWEX0;
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77 else if (!strcasecmp(arg, "os9"))
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78 outformat = OUTPUT_OS9;
0
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79 else
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80 {
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81 fprintf(stderr, "Invalid output format: %s\n", arg);
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82 exit(1);
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83 }
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84 break;
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85 case lw_cmdline_key_end:
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86 // done; sanity check
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87 if (!outfile)
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88 outfile = "a.out";
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89 break;
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90
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91 case 'l':
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92 add_input_library(arg);
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93 break;
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94
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95 case 'L':
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96 add_library_search(arg);
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97 break;
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98
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99 case 0x100:
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100 add_section_base(arg);
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101 break;
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102
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103 case 'm':
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104 map_file = arg;
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105 break;
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106
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107 case lw_cmdline_key_arg:
0
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108 add_input_file(arg);
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109 break;
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110
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111 default:
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112 return lw_cmdline_err_unknown;
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113 }
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114 return 0;
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115 }
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116
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117 static struct lw_cmdline_options options[] =
0
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118 {
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119 { "output", 'o', "FILE", 0,
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120 "Output to FILE"},
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121 { "debug", 'd', 0, 0,
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122 "Set debug mode"},
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123 { "format", 'f', "TYPE", 0,
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124 "Select output format: decb, raw, lwex, os9"},
0
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125 { "decb", 'b', 0, 0,
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126 "Generate DECB .bin format output, equivalent of --format=decb"},
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127 { "raw", 'r', 0, 0,
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128 "Generate raw binary format output, equivalent of --format=raw"},
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129 { "script", 's', "FILE", 0,
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130 "Specify the linking script (overrides the built in defaults)"},
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131 { "library", 'l', "LIBSPEC", 0,
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132 "Read library libLIBSPEC.a from the search path" },
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133 { "library-path", 'L', "DIR", 0,
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134 "Add DIR to the library search path" },
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135 { "section-base", 0x100, "SECT=BASE", 0,
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136 "Load section SECT at BASE" },
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137 { "map", 'm', "FILE", 0,
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138 "Output informaiton about the link" },
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139 { 0 }
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140 };
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141
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142 static struct lw_cmdline_parser cmdline_parser =
0
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143 {
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144 options,
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145 parse_opts,
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146 "INPUTFILE ...",
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147 "lwlink, a HD6309 and MC6809 cross-linker",
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148 PROGVER
0
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149 };
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150
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151 extern void read_files(void);
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152 extern void setup_script(void);
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153 extern void resolve_files(void);
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154 extern void resolve_sections(void);
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155 extern void resolve_references(void);
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156 extern void do_output(void);
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157 extern void display_map(void);
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158
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159 // main function; parse command line, set up assembler state, and run the
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160 // assembler on the first file
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161 int main(int argc, char **argv)
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162 {
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163 program_name = argv[0];
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164
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165 lw_cmdline_parse(&cmdline_parser, argc, argv, 0, 0, NULL);
0
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166 if (ninputfiles == 0)
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167 {
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168 fprintf(stderr, "No input files\n");
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169 exit(1);
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170 }
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171
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172 unlink(outfile);
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173
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174 // handle the linker script
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175 setup_script();
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176
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177 // read the input files
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178 read_files();
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179
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180 // trace unresolved references and determine which non-forced
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181 // objects must be included
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182 resolve_files();
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183
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184 // resolve section bases and section order
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185 resolve_sections();
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186
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187 // resolve incomplete references
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188 resolve_references();
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189
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190 // do the actual output
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191 do_output();
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192
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193 // display/output the link map
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194 if (map_file)
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195 display_map();
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196
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197 exit(0);
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198 }