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annotate lwlink/main.c @ 512:7e41d6123175

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author William Astle <lost@l-w.ca>
date Sat, 04 Jul 2020 16:21:08 -0600
parents a6c9129e5948
children 1744f2d1a821
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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
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32 #include <version.h>
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33
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34 #include "lwlink.h"
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35
386
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36 #ifdef _MSC_VER
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37 #include <lw_win.h> // windows build
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38 #else
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39 #include <unistd.h>
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40 #endif
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41
0
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42 char *program_name;
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43
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44 // command line option handling
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45 #define PROGVER "lwlink from " PACKAGE_STRING
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46
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47 static int parse_opts(int key, char *arg, void *state)
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48 {
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49 switch (key)
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50 {
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51 case 'o':
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52 // output
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53 outfile = arg;
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54 break;
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55
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56 case 's':
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57 // script file
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58 scriptfile = arg;
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59 break;
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60
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61 case 'd':
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62 // debug
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63 debug_level++;
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64 break;
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65
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66 case 'e':
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67 // entry symbol
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68 entrysym = arg;
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69 break;
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70
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71 case 'b':
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72 // decb output
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73 outformat = OUTPUT_DECB;
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74 break;
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75
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76 case 'r':
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77 // raw binary output
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78 outformat = OUTPUT_RAW;
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79 break;
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80
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81 case 'f':
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82 // output format
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83 if (!strcasecmp(arg, "decb"))
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84 outformat = OUTPUT_DECB;
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85 else if (!strcasecmp(arg, "raw"))
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86 outformat = OUTPUT_RAW;
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87 else if (!strcasecmp(arg, "lwex0") || !strcasecmp(arg, "lwex"))
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88 outformat = OUTPUT_LWEX0;
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89 else if (!strcasecmp(arg, "os9"))
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90 outformat = OUTPUT_OS9;
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91 else if (!strcasecmp(arg, "srec"))
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92 outformat = OUTPUT_SREC;
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93 else
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94 {
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95 fprintf(stderr, "Invalid output format: %s\n", arg);
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96 exit(1);
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97 }
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98 break;
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99 case lw_cmdline_key_end:
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100 // done; sanity check
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101 if (!outfile)
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102 outfile = "a.out";
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103 break;
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104
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105 case 'l':
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106 add_input_library(arg);
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107 break;
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108
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109 case 'L':
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110 add_library_search(arg);
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111 break;
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112
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113 case 0x100:
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114 add_section_base(arg);
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115 break;
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116
179
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117 case 0x101:
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118 sysroot = arg;
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119 break;
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120
0
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121 case 'm':
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122 map_file = arg;
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123 break;
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124
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125 case lw_cmdline_key_arg:
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126 add_input_file(arg);
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127 break;
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128
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129 default:
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130 return lw_cmdline_err_unknown;
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131 }
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132 return 0;
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133 }
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134
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135 static struct lw_cmdline_options options[] =
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136 {
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137 { "output", 'o', "FILE", 0,
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138 "Output to FILE"},
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139 { "debug", 'd', 0, 0,
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140 "Set debug mode"},
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141 { "format", 'f', "TYPE", 0,
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142 "Select output format: decb, raw, lwex, os9, srec"},
0
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143 { "decb", 'b', 0, 0,
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144 "Generate DECB .bin format output, equivalent of --format=decb"},
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145 { "raw", 'r', 0, 0,
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146 "Generate raw binary format output, equivalent of --format=raw"},
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147 { "script", 's', "FILE", 0,
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148 "Specify the linking script (overrides the built in defaults)"},
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149 { "library", 'l', "LIBSPEC", 0,
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150 "Read library libLIBSPEC.a from the search path" },
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151 { "library-path", 'L', "DIR", 0,
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152 "Add DIR to the library search path" },
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153 { "section-base", 0x100, "SECT=BASE", 0,
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154 "Load section SECT at BASE" },
183
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155 { "entry", 'e', "SYM", 0,
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156 "Specify SYM as program entry point" },
179
606123758641 Added --sysroot support to lwlink and the ld wrapper script
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157 { "sysroot", 0x101, "DIR", 0,
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158 "Specify the path to replace an initial = with in library paths" },
0
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159 { "map", 'm', "FILE", 0,
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160 "Output informaiton about the link" },
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161 { 0 }
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162 };
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163
8
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164 static struct lw_cmdline_parser cmdline_parser =
0
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165 {
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166 options,
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167 parse_opts,
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168 "INPUTFILE ...",
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169 "lwlink, a HD6309 and MC6809 cross-linker",
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170 PROGVER
0
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171 };
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172
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173 extern void read_files(void);
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174 extern void setup_script(void);
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175 extern void resolve_files(void);
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176 extern void resolve_sections(void);
234
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177 extern void generate_symbols(void);
0
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178 extern void resolve_references(void);
236
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179 extern void resolve_padding(void);
0
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180 extern void do_output(void);
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181 extern void display_map(void);
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182
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183 // main function; parse command line, set up assembler state, and run the
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184 // assembler on the first file
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185 int main(int argc, char **argv)
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186 {
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187 program_name = argv[0];
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188
441
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189 if (lw_cmdline_parse(&cmdline_parser, argc, argv, 0, 0, NULL) != 0)
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190 {
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191 // bail if parsing failed
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192 exit(1);
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193 }
0
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194 if (ninputfiles == 0)
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195 {
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196 fprintf(stderr, "No input files\n");
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197 exit(1);
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198 }
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199
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200 unlink(outfile);
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201
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202 // handle the linker script
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203 setup_script();
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204
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205 // read the input files
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206 read_files();
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207
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208 // trace unresolved references and determine which non-forced
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209 // objects must be included
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210 resolve_files();
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211
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212 // resolve section bases and section order
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213 resolve_sections();
234
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214
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215 // generate symbols
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216 generate_symbols();
0
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217
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218 // resolve incomplete references
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219 resolve_references();
236
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220
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221 // resolve section padding bits
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222 resolve_padding();
0
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223
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224 // do the actual output
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225 do_output();
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226
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227 // display/output the link map
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228 if (map_file)
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229 display_map();
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230
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231 exit(0);
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232 }