Mercurial > hg > index.cgi
annotate lwlink/script.c @ 4:a4812d57ed13
Started implementing command line parsing in lwlib
author | lost@l-w.ca |
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date | Fri, 21 Jan 2011 22:54:48 -0700 |
parents | 7317fbe024af |
children | fdc11ef4115b |
rev | line source |
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0
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1 /* |
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2 script.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 Read and parse linker scripts |
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22 */ |
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23 |
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24 #include <ctype.h> |
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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 "lwlink.h" |
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31 #include "util.h" |
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32 |
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33 // the built-in DECB target linker script |
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34 static char *decb_script = |
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35 "section init load 2000\n" |
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36 "section code\n" |
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37 "section *,!bss\n" |
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38 "section *,bss\n" |
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39 "entry 2000\n" |
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40 ; |
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41 |
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42 // the built-in RAW target linker script |
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43 static char *raw_script = |
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44 "section init load 0000\n" |
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45 "section code\n" |
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46 "section *,!bss\n" |
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47 "section *,bss\n" |
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48 ; |
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49 |
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50 static char *lwex0_script = |
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51 "section init load 0100\n" |
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52 "section .text\n" |
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53 "section .data\n" |
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54 "section *,!bss\n" |
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55 "section *,bss\n" |
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56 "entry __start\n" |
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57 "stacksize 0100\n" // default 256 byte stack |
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58 ; |
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59 |
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60 // the "simple" script |
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61 static char *simple_script = |
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62 "section *,!bss\n" |
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63 "section *,bss\n" |
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64 ; |
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65 |
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66 linkscript_t linkscript = { 0, NULL, -1 }; |
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67 |
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68 void setup_script() |
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69 { |
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70 char *script, *oscript; |
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71 long size; |
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72 |
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73 // read the file if needed |
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74 if (scriptfile) |
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75 { |
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76 FILE *f; |
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77 long bread; |
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78 |
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79 f = fopen(scriptfile, "rb"); |
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80 if (!f) |
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81 { |
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82 fprintf(stderr, "Can't open file %s:", scriptfile); |
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83 perror(""); |
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84 exit(1); |
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85 } |
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86 fseek(f, 0, SEEK_END); |
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87 size = ftell(f); |
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88 rewind(f); |
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89 |
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90 script = lw_malloc(size + 2); |
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91 |
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92 bread = fread(script, 1, size, f); |
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93 if (bread < size) |
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94 { |
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95 fprintf(stderr, "Short read on file %s (%ld/%ld):", scriptfile, bread, size); |
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96 perror(""); |
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97 exit(1); |
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98 } |
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99 fclose(f); |
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100 |
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101 script[size] = '\n'; |
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102 script[size + 1] = '\0'; |
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103 } |
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104 else |
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105 { |
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106 // fetch defaults based on output mode |
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107 switch (outformat) |
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108 { |
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109 case OUTPUT_RAW: |
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110 script = raw_script; |
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111 break; |
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112 |
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113 case OUTPUT_DECB: |
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114 script = decb_script; |
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115 break; |
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116 |
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117 case OUTPUT_LWEX0: |
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118 script = lwex0_script; |
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119 break; |
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120 |
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121 default: |
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122 script = simple_script; |
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123 break; |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff
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|
124 } |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
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|
125 |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff
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|
126 size = strlen(script); |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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127 if (nscriptls) |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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|
128 { |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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|
129 char *rscript; |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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130 int i; |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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|
131 // prepend the "extra" script lines |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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132 for (i = 0; i < nscriptls; i++) |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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133 size += strlen(scriptls[i]) + 1; |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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|
134 |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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135 rscript = lw_malloc(size + 1); |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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136 oscript = rscript; |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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137 for (i = 0; i < nscriptls; i++) |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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138 { |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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139 oscript += sprintf(oscript, "%s\n", scriptls[i]); |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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140 } |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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141 strcpy(oscript, script); |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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142 script = rscript; |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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|
143 } |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff
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|
144 } |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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145 |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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146 if (outformat == OUTPUT_LWEX0) |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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147 linkscript.stacksize = 0x100; |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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148 |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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149 oscript = script; |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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150 // now parse the script file |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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151 while (*script) |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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152 { |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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153 char *ptr, *ptr2, *line; |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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154 |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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155 for (ptr = script; *ptr && *ptr != '\n' && *ptr != '\r'; ptr++) |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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156 /* do nothing */ ; |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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157 |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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158 line = lw_malloc(ptr - script + 1); |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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159 memcpy(line, script, ptr - script); |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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160 line[ptr - script] = '\0'; |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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161 |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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162 // skip line terms |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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163 for (script = ptr + 1; *script == '\n' || *script == '\r'; script++) |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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164 /* do nothing */ ; |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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165 |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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166 // ignore leading whitespace |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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167 for (ptr = line; *ptr && isspace(*ptr); ptr++) |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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168 /* do nothing */ ; |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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169 |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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170 // ignore blank lines |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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171 if (!*ptr) |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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172 continue; |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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173 |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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174 for (ptr = line; *ptr && !isspace(*ptr); ptr++) |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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175 /* do nothing */ ; |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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176 |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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177 // now ptr points to the char past the first word |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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178 // NUL it out |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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179 if (*ptr) |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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180 *ptr++ = '\0'; |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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181 |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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182 // skip spaces after the first word |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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183 for ( ; *ptr && isspace(*ptr); ptr++) |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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184 /* do nothing */ ; |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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185 |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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186 if (!strcmp(line, "pad")) |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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187 { |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
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188 // padding |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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189 // parse the hex number and stow it |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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190 linkscript.padsize = strtol(ptr, NULL, 16); |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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191 if (linkscript.padsize < 0) |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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192 linkscript.padsize = 0; |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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193 } |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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194 else if (!strcmp(line, "stacksize")) |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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195 { |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff
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|
196 // stack size for targets that support it |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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197 // parse the hex number and stow it |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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|
198 linkscript.padsize = strtol(ptr, NULL, 16); |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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|
199 if (linkscript.stacksize < 0) |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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200 linkscript.stacksize = 0x100; |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff
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|
201 } |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff
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|
202 else if (!strcmp(line, "entry")) |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff
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|
203 { |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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|
204 int eaddr; |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
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|
205 |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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|
206 eaddr = strtol(ptr, &ptr2, 16); |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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|
207 if (*ptr2) |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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|
208 { |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff
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|
209 linkscript.execaddr = -1; |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
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|
210 linkscript.execsym = lw_strdup(ptr); |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff
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|
211 } |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff
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|
212 else |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff
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|
213 { |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
214 linkscript.execaddr = eaddr; |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff
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|
215 linkscript.execsym = NULL; |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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|
216 } |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff
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|
217 } |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff
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|
218 else if (!strcmp(line, "section")) |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff
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|
219 { |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
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|
220 // section |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff
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|
221 // parse out the section name and flags |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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222 for (ptr2 = ptr; *ptr2 && !isspace(*ptr2); ptr2++) |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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|
223 /* do nothing */ ; |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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|
224 |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff
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|
225 if (*ptr2) |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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226 *ptr2++ = '\0'; |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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|
227 |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff
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|
228 while (*ptr2 && isspace(*ptr2)) |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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|
229 ptr2++; |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
230 |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff
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|
231 // ptr now points to the section name and flags and ptr2 |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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|
232 // to the first non-space character following |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff
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|
233 |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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|
234 // then look for "load <addr>" clause |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
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|
235 if (*ptr2) |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff
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|
236 { |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
237 if (!strncmp(ptr2, "load", 4)) |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
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|
238 { |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
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|
239 ptr2 += 4; |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
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|
240 while (*ptr2 && isspace(*ptr2)) |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
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|
241 ptr2++; |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
242 |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
243 } |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
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|
244 else |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
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|
245 { |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
246 fprintf(stderr, "%s: bad script\n", scriptfile); |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
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247 exit(1); |
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248 } |
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249 } |
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250 |
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251 // now ptr2 points to the load address if there is one |
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252 // or NUL if not |
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253 linkscript.lines = lw_realloc(linkscript.lines, sizeof(struct scriptline_s) * (linkscript.nlines + 1)); |
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254 |
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255 linkscript.lines[linkscript.nlines].noflags = 0; |
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256 linkscript.lines[linkscript.nlines].yesflags = 0; |
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257 if (*ptr2) |
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258 linkscript.lines[linkscript.nlines].loadat = strtol(ptr2, NULL, 16); |
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259 else |
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260 linkscript.lines[linkscript.nlines].loadat = -1; |
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261 for (ptr2 = ptr; *ptr2 && *ptr2 != ','; ptr2++) |
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262 /* do nothing */ ; |
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263 if (*ptr2) |
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264 { |
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265 *ptr2++ = '\0'; |
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266 if (!strcmp(ptr2, "!bss")) |
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267 { |
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268 linkscript.lines[linkscript.nlines].noflags = SECTION_BSS; |
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269 } |
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270 else if (!strcmp(ptr2, "bss")) |
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271 { |
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272 linkscript.lines[linkscript.nlines].yesflags = SECTION_BSS; |
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273 } |
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274 else |
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275 { |
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276 fprintf(stderr, "%s: bad script\n", scriptfile); |
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277 exit(1); |
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278 } |
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279 } |
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280 if (ptr[0] == '*' && ptr[1] == '\0') |
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281 linkscript.lines[linkscript.nlines].sectname = NULL; |
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282 else |
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283 linkscript.lines[linkscript.nlines].sectname = lw_strdup(ptr); |
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284 linkscript.nlines++; |
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285 } |
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286 else |
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287 { |
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288 fprintf(stderr, "%s: bad script\n", scriptfile); |
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289 exit(1); |
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290 } |
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291 lw_free(line); |
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292 } |
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293 |
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294 if (scriptfile || nscriptls) |
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295 lw_free(oscript); |
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296 } |