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annotate lwlink/main.c @ 523:1744f2d1a821

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Change behaviour of --format=raw; old behaviour kept for --format=raw2 Make the default --format=raw output just ignore BSS flagged sections. If you put any in the middle of your code, your output file will break. Don't do dumb things like that. If you really need the old behaviour, change to --format=raw2 Neither behaviour is really ideal but doing the "right" thing is a boatload more complicated and is still going to do the wrong thing from time to time. Most situations will likely load the BSS sections with separate link script directives anyway or be assembling directly to raw without using the linker.
author William Astle <lost@l-w.ca>
date Mon, 24 Jan 2022 13:55:40 -0700
parents a6c9129e5948
children cde1a5a48636
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
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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
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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, "raw2"))
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88 outformat = OUTPUT_RAW2;
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89 else if (!strcasecmp(arg, "lwex0") || !strcasecmp(arg, "lwex"))
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90 outformat = OUTPUT_LWEX0;
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91 else if (!strcasecmp(arg, "os9"))
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92 outformat = OUTPUT_OS9;
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93 else if (!strcasecmp(arg, "srec"))
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94 outformat = OUTPUT_SREC;
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95 else
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96 {
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97 fprintf(stderr, "Invalid output format: %s\n", arg);
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98 exit(1);
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99 }
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100 break;
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101 case lw_cmdline_key_end:
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102 // done; sanity check
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103 if (!outfile)
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104 outfile = "a.out";
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105 break;
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106
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107 case 'l':
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108 add_input_library(arg);
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109 break;
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110
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111 case 'L':
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112 add_library_search(arg);
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113 break;
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114
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115 case 0x100:
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116 add_section_base(arg);
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117 break;
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118
179
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119 case 0x101:
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120 sysroot = arg;
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121 break;
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122
0
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123 case 'm':
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124 map_file = arg;
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125 break;
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126
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127 case lw_cmdline_key_arg:
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128 add_input_file(arg);
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129 break;
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130
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131 default:
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132 return lw_cmdline_err_unknown;
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133 }
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134 return 0;
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135 }
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136
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137 static struct lw_cmdline_options options[] =
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138 {
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139 { "output", 'o', "FILE", 0,
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140 "Output to FILE"},
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141 { "debug", 'd', 0, 0,
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142 "Set debug mode"},
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143 { "format", 'f', "TYPE", 0,
344
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144 "Select output format: decb, raw, lwex, os9, srec"},
0
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145 { "decb", 'b', 0, 0,
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146 "Generate DECB .bin format output, equivalent of --format=decb"},
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147 { "raw", 'r', 0, 0,
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148 "Generate raw binary format output, equivalent of --format=raw"},
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149 { "script", 's', "FILE", 0,
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150 "Specify the linking script (overrides the built in defaults)"},
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151 { "library", 'l', "LIBSPEC", 0,
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152 "Read library libLIBSPEC.a from the search path" },
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153 { "library-path", 'L', "DIR", 0,
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154 "Add DIR to the library search path" },
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155 { "section-base", 0x100, "SECT=BASE", 0,
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156 "Load section SECT at BASE" },
183
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157 { "entry", 'e', "SYM", 0,
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158 "Specify SYM as program entry point" },
179
606123758641 Added --sysroot support to lwlink and the ld wrapper script
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159 { "sysroot", 0x101, "DIR", 0,
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160 "Specify the path to replace an initial = with in library paths" },
0
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161 { "map", 'm', "FILE", 0,
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162 "Output informaiton about the link" },
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163 { 0 }
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164 };
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165
8
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166 static struct lw_cmdline_parser cmdline_parser =
0
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167 {
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168 options,
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169 parse_opts,
8
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170 "INPUTFILE ...",
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171 "lwlink, a HD6309 and MC6809 cross-linker",
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172 PROGVER
0
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173 };
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174
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175 extern void read_files(void);
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176 extern void setup_script(void);
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177 extern void resolve_files(void);
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178 extern void resolve_sections(void);
234
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179 extern void generate_symbols(void);
0
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180 extern void resolve_references(void);
236
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181 extern void resolve_padding(void);
0
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182 extern void do_output(void);
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183 extern void display_map(void);
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184
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185 // main function; parse command line, set up assembler state, and run the
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186 // assembler on the first file
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187 int main(int argc, char **argv)
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188 {
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189 program_name = argv[0];
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190
441
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191 if (lw_cmdline_parse(&cmdline_parser, argc, argv, 0, 0, NULL) != 0)
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192 {
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193 // bail if parsing failed
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194 exit(1);
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195 }
0
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196 if (ninputfiles == 0)
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197 {
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198 fprintf(stderr, "No input files\n");
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199 exit(1);
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200 }
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201
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202 unlink(outfile);
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203
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204 // handle the linker script
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205 setup_script();
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206
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207 // read the input files
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208 read_files();
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209
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210 // trace unresolved references and determine which non-forced
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211 // objects must be included
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212 resolve_files();
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213
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214 // resolve section bases and section order
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215 resolve_sections();
234
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216
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217 // generate symbols
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218 generate_symbols();
0
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219
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220 // resolve incomplete references
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221 resolve_references();
236
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222
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223 // resolve section padding bits
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224 resolve_padding();
0
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225
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226 // do the actual output
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227 do_output();
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228
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229 // display/output the link map
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230 if (map_file)
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231 display_map();
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232
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233 exit(0);
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234 }