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annotate src/script.c @ 307:87c4e65074f0
Actually allow script file to be specified and fix segfault on parsing script file
| author | lost |
|---|---|
| date | Fri, 23 Jan 2009 04:53:01 +0000 |
| parents | be1abc4ac114 |
| children |
| rev | line source |
|---|---|
| 299 | 1 /* |
| 2 script.c | |
| 300 | 3 Copyright © 2009 William Astle |
| 299 | 4 |
| 5 This file is part of LWLINK. | |
| 6 | |
| 7 LWLINK is free software: you can redistribute it and/or modify it under the | |
| 8 terms of the GNU General Public License as published by the Free Software | |
| 9 Foundation, either version 3 of the License, or (at your option) any later | |
| 10 version. | |
| 11 | |
| 12 This program is distributed in the hope that it will be useful, but WITHOUT | |
| 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
| 15 more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License along with | |
| 18 this program. If not, see <http://www.gnu.org/licenses/>. | |
| 19 | |
| 20 | |
| 21 Read and parse linker scripts | |
| 22 */ | |
| 23 | |
| 24 #ifdef HAVE_CONFIG_H | |
| 25 #include "config.h" | |
| 26 #endif | |
| 27 | |
| 28 #include <errno.h> | |
| 29 #include <stdio.h> | |
| 30 #include <stdlib.h> | |
| 31 #include <string.h> | |
| 32 | |
| 33 #include "lwlink.h" | |
| 34 #include "util.h" | |
| 35 | |
| 36 // the built-in DECB target linker script | |
| 37 static char *decb_script = | |
| 306 | 38 "section init load 2000\n" |
| 299 | 39 "section code\n" |
| 40 "section *,!bss\n" | |
| 41 "section *,bss\n" | |
| 303 | 42 "entry 2000\n" |
| 299 | 43 ; |
| 44 | |
| 45 // the built-in RAW target linker script | |
| 46 static char *raw_script = | |
| 306 | 47 "section init load 0000\n" |
| 299 | 48 "section code\n" |
| 49 "section *,!bss\n" | |
| 50 "section *,bss\n" | |
| 51 ; | |
| 52 | |
| 53 // the "simple" script | |
| 54 static char *simple_script = | |
| 55 "section *,!bss\n" | |
| 56 "section *,bss\n" | |
| 57 ; | |
| 58 | |
| 59 linkscript_t linkscript = { 0, NULL, -1 }; | |
| 60 | |
| 61 void setup_script() | |
| 62 { | |
|
307
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Actually allow script file to be specified and fix segfault on parsing script file
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63 char *script, *oscript; |
| 299 | 64 long size; |
| 65 | |
| 66 // read the file if needed | |
| 67 if (scriptfile) | |
| 68 { | |
| 69 FILE *f; | |
| 70 long bread; | |
| 71 | |
| 72 f = fopen(scriptfile, "rb"); | |
| 73 if (!f) | |
| 74 { | |
| 75 fprintf(stderr, "Can't open file %s:", scriptfile); | |
| 76 perror(""); | |
| 77 exit(1); | |
| 78 } | |
| 79 fseek(f, 0, SEEK_END); | |
| 80 size = ftell(f); | |
| 81 rewind(f); | |
| 82 | |
| 83 script = lw_malloc(size + 2); | |
| 84 | |
| 85 bread = fread(script, 1, size, f); | |
| 86 if (bread < size) | |
| 87 { | |
| 88 fprintf(stderr, "Short read on file %s (%ld/%ld):", scriptfile, bread, size); | |
| 89 perror(""); | |
| 90 exit(1); | |
| 91 } | |
| 92 fclose(f); | |
| 93 | |
| 94 script[size] = '\n'; | |
| 95 script[size + 1] = '\0'; | |
| 96 } | |
| 97 else | |
| 98 { | |
| 99 // fetch defaults based on output mode | |
| 100 switch (outformat) | |
| 101 { | |
| 102 case OUTPUT_RAW: | |
| 103 script = raw_script; | |
| 104 break; | |
| 105 | |
| 106 case OUTPUT_DECB: | |
| 107 script = decb_script; | |
| 108 break; | |
| 109 | |
| 110 default: | |
| 111 script = simple_script; | |
| 112 break; | |
| 113 } | |
| 114 | |
| 115 size = strlen(script); | |
| 116 } | |
| 117 | |
|
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118 oscript = script; |
| 299 | 119 // now parse the script file |
| 120 while (*script) | |
| 121 { | |
| 122 char *ptr, *ptr2, *line; | |
| 123 | |
| 124 for (ptr = script; *ptr && *ptr != '\n' && *ptr != '\r'; ptr++) | |
| 125 /* do nothing */ ; | |
| 126 | |
| 127 line = lw_malloc(ptr - script + 1); | |
| 128 memcpy(line, script, ptr - script); | |
| 129 line[ptr - script] = '\0'; | |
| 130 | |
| 131 // skip line terms | |
| 132 for (script = ptr + 1; *script == '\n' || *script == '\r'; script++) | |
| 133 /* do nothing */ ; | |
| 134 | |
| 135 // ignore leading whitespace | |
| 136 for (ptr = line; *ptr && isspace(*ptr); ptr++) | |
| 137 /* do nothing */ ; | |
| 138 | |
| 139 // ignore blank lines | |
| 140 if (!*ptr) | |
| 141 continue; | |
| 142 | |
| 143 for (ptr = line; *ptr && !isspace(*ptr); ptr++) | |
| 144 /* do nothing */ ; | |
| 145 | |
| 146 // now ptr points to the char past the first word | |
| 147 // NUL it out | |
| 148 if (*ptr) | |
| 149 *ptr++ = '\0'; | |
| 150 | |
| 151 // skip spaces after the first word | |
| 152 for ( ; *ptr && isspace(*ptr); ptr++) | |
| 153 /* do nothing */ ; | |
| 154 | |
| 155 if (!strcmp(line, "pad")) | |
| 156 { | |
| 157 // padding | |
| 158 // parse the hex number and stow it | |
| 159 linkscript.padsize = strtol(ptr, NULL, 16); | |
| 160 if (linkscript.padsize < 0) | |
| 161 linkscript.padsize = 0; | |
| 162 } | |
| 303 | 163 else if (!strcmp(line, "entry")) |
| 164 { | |
| 165 int eaddr; | |
| 166 | |
| 167 eaddr = strtol(ptr, &ptr2, 16); | |
| 168 if (*ptr2) | |
| 169 { | |
| 170 linkscript.execaddr = -1; | |
| 171 linkscript.execsym = lw_strdup(ptr); | |
| 172 } | |
| 173 else | |
| 174 { | |
| 175 linkscript.execaddr = eaddr; | |
| 176 linkscript.execsym = NULL; | |
| 177 } | |
| 178 } | |
| 299 | 179 else if (!strcmp(line, "section")) |
| 180 { | |
| 181 // section | |
| 182 // parse out the section name and flags | |
| 183 for (ptr2 = ptr; *ptr2 && !isspace(*ptr2); ptr2++) | |
| 184 /* do nothing */ ; | |
| 185 | |
| 186 if (*ptr2) | |
| 187 *ptr2++ = '\0'; | |
| 188 | |
| 189 while (*ptr2 && isspace(*ptr2)) | |
| 190 ptr2++; | |
| 191 | |
| 192 // ptr now points to the section name and flags and ptr2 | |
| 193 // to the first non-space character following | |
| 194 | |
| 195 // then look for "load <addr>" clause | |
| 196 if (*ptr2) | |
| 197 { | |
| 198 if (!strncmp(ptr2, "load", 4)) | |
| 199 { | |
| 200 ptr2 += 4; | |
| 201 while (*ptr2 && isspace(*ptr2)) | |
| 202 ptr2++; | |
| 203 | |
| 204 } | |
| 205 else | |
| 206 { | |
| 207 fprintf(stderr, "%s: bad script\n", scriptfile); | |
| 208 exit(1); | |
| 209 } | |
| 210 } | |
| 211 | |
| 212 // now ptr2 points to the load address if there is one | |
| 213 // or NUL if not | |
| 214 linkscript.lines = lw_realloc(linkscript.lines, sizeof(struct scriptline_s) * (linkscript.nlines + 1)); | |
| 215 | |
| 216 linkscript.lines[linkscript.nlines].noflags = 0; | |
| 217 linkscript.lines[linkscript.nlines].yesflags = 0; | |
| 218 if (*ptr2) | |
| 219 linkscript.lines[linkscript.nlines].loadat = strtol(ptr2, NULL, 16); | |
| 220 else | |
| 221 linkscript.lines[linkscript.nlines].loadat = -1; | |
| 222 for (ptr2 = ptr; *ptr2 && *ptr2 != ','; ptr2++) | |
| 223 /* do nothing */ ; | |
| 224 if (*ptr2) | |
| 225 { | |
| 226 *ptr2++ = '\0'; | |
| 227 if (!strcmp(ptr2, "!bss")) | |
| 228 { | |
| 229 linkscript.lines[linkscript.nlines].noflags = SECTION_BSS; | |
| 230 } | |
| 231 else if (!strcmp(ptr2, "bss")) | |
| 232 { | |
| 233 linkscript.lines[linkscript.nlines].yesflags = SECTION_BSS; | |
| 234 } | |
| 235 else | |
| 236 { | |
| 237 fprintf(stderr, "%s: bad script\n", scriptfile); | |
| 238 exit(1); | |
| 239 } | |
| 240 } | |
| 301 | 241 if (ptr[0] == '*' && ptr[1] == '\0') |
| 242 linkscript.lines[linkscript.nlines].sectname = NULL; | |
| 243 else | |
| 244 linkscript.lines[linkscript.nlines].sectname = lw_strdup(ptr); | |
| 299 | 245 linkscript.nlines++; |
| 246 } | |
| 247 else | |
| 248 { | |
| 249 fprintf(stderr, "%s: bad script\n", scriptfile); | |
| 250 exit(1); | |
| 251 } | |
| 252 lw_free(line); | |
| 253 } | |
| 254 | |
| 255 if (scriptfile) | |
|
307
87c4e65074f0
Actually allow script file to be specified and fix segfault on parsing script file
lost
parents:
306
diff
changeset
|
256 lw_free(oscript); |
| 299 | 257 } |