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annotate lwlink/main.c @ 389:2d9b7ae6c329

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Throw error if address overflows in extended mode This may or may not cause extra problems due to sloppiness in dealing with calculations that overflow in 16 bits. However, presumably it is a good idea so unless something major pops up, it seems like a good idea. Thanks to Erik G <erik@6809.org> for the patch.
author William Astle <lost@l-w.ca>
date Mon, 13 Jul 2015 21:37:49 -0600
parents 221b5f58d8ad
children b138b4005125
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 <string.h>
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29
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30 #include <lw_cmdline.h>
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31 #include <lw_version.h>
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32
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33 #include "lwlink.h"
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34
386
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35 #ifdef _MSC_VER
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36 #include <lw_win.h> // windows build
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37 #else
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38 #include <unistd.h>
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39 #endif
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40
0
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41 char *program_name;
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42
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43 // command line option handling
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44 #define PROGVER "lwlink from " PACKAGE_STRING
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45
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46 static int parse_opts(int key, char *arg, void *state)
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47 {
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48 switch (key)
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49 {
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50 case 'o':
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51 // output
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52 outfile = arg;
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53 break;
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54
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55 case 's':
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56 // script file
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57 scriptfile = arg;
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58 break;
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59
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60 case 'd':
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61 // debug
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62 debug_level++;
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63 break;
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64
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65 case 'e':
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66 // entry symbol
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67 entrysym = arg;
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68 break;
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69
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70 case 'b':
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71 // decb output
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72 outformat = OUTPUT_DECB;
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73 break;
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74
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75 case 'r':
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76 // raw binary output
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77 outformat = OUTPUT_RAW;
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78 break;
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79
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80 case 'f':
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81 // output format
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82 if (!strcasecmp(arg, "decb"))
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83 outformat = OUTPUT_DECB;
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84 else if (!strcasecmp(arg, "raw"))
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85 outformat = OUTPUT_RAW;
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86 else if (!strcasecmp(arg, "lwex0") || !strcasecmp(arg, "lwex"))
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87 outformat = OUTPUT_LWEX0;
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88 else if (!strcasecmp(arg, "os9"))
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89 outformat = OUTPUT_OS9;
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90 else if (!strcasecmp(arg, "srec"))
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91 outformat = OUTPUT_SREC;
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92 else
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93 {
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94 fprintf(stderr, "Invalid output format: %s\n", arg);
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95 exit(1);
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96 }
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97 break;
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98 case lw_cmdline_key_end:
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99 // done; sanity check
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100 if (!outfile)
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101 outfile = "a.out";
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102 break;
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103
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104 case 'l':
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105 add_input_library(arg);
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106 break;
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107
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108 case 'L':
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109 add_library_search(arg);
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110 break;
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111
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112 case 0x100:
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113 add_section_base(arg);
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114 break;
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115
179
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116 case 0x101:
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117 sysroot = arg;
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118 break;
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119
0
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120 case 'm':
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121 map_file = arg;
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122 break;
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123
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124 case lw_cmdline_key_arg:
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125 add_input_file(arg);
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126 break;
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127
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128 default:
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129 return lw_cmdline_err_unknown;
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130 }
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131 return 0;
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132 }
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133
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134 static struct lw_cmdline_options options[] =
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135 {
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136 { "output", 'o', "FILE", 0,
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137 "Output to FILE"},
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138 { "debug", 'd', 0, 0,
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139 "Set debug mode"},
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140 { "format", 'f', "TYPE", 0,
344
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141 "Select output format: decb, raw, lwex, os9, srec"},
0
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142 { "decb", 'b', 0, 0,
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143 "Generate DECB .bin format output, equivalent of --format=decb"},
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144 { "raw", 'r', 0, 0,
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145 "Generate raw binary format output, equivalent of --format=raw"},
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146 { "script", 's', "FILE", 0,
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147 "Specify the linking script (overrides the built in defaults)"},
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148 { "library", 'l', "LIBSPEC", 0,
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149 "Read library libLIBSPEC.a from the search path" },
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150 { "library-path", 'L', "DIR", 0,
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151 "Add DIR to the library search path" },
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152 { "section-base", 0x100, "SECT=BASE", 0,
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153 "Load section SECT at BASE" },
183
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154 { "entry", 'e', "SYM", 0,
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155 "Specify SYM as program entry point" },
179
606123758641 Added --sysroot support to lwlink and the ld wrapper script
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156 { "sysroot", 0x101, "DIR", 0,
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157 "Specify the path to replace an initial = with in library paths" },
0
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158 { "map", 'm', "FILE", 0,
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159 "Output informaiton about the link" },
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160 { 0 }
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161 };
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162
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163 static struct lw_cmdline_parser cmdline_parser =
0
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164 {
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165 options,
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166 parse_opts,
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167 "INPUTFILE ...",
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168 "lwlink, a HD6309 and MC6809 cross-linker",
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169 PROGVER
0
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170 };
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171
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172 extern void read_files(void);
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173 extern void setup_script(void);
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174 extern void resolve_files(void);
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175 extern void resolve_sections(void);
234
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176 extern void generate_symbols(void);
0
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177 extern void resolve_references(void);
236
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178 extern void resolve_padding(void);
0
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179 extern void do_output(void);
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180 extern void display_map(void);
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181
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182 // main function; parse command line, set up assembler state, and run the
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183 // assembler on the first file
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184 int main(int argc, char **argv)
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185 {
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186 program_name = argv[0];
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187
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188 lw_cmdline_parse(&cmdline_parser, argc, argv, 0, 0, NULL);
0
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189 if (ninputfiles == 0)
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190 {
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191 fprintf(stderr, "No input files\n");
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192 exit(1);
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193 }
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194
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195 unlink(outfile);
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196
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197 // handle the linker script
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198 setup_script();
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199
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200 // read the input files
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201 read_files();
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202
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203 // trace unresolved references and determine which non-forced
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204 // objects must be included
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205 resolve_files();
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206
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207 // resolve section bases and section order
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208 resolve_sections();
234
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209
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210 // generate symbols
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211 generate_symbols();
0
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212
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213 // resolve incomplete references
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214 resolve_references();
236
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215
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216 // resolve section padding bits
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217 resolve_padding();
0
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218
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219 // do the actual output
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220 do_output();
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221
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222 // display/output the link map
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223 if (map_file)
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224 display_map();
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225
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226 exit(0);
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227 }