Mercurial > hg > index.cgi
comparison lwlink/script.c @ 315:fcd103148aa6
Add ability to load sections downward instead of upward
Add "section ... high ..." statement to link scripts to allow a section to
be placed based on its end address instead of its start address. All
sections listed after such a statement are treated as growing downward until
the next section statement specifying a load address.
| author | William Astle <lost@l-w.ca> |
|---|---|
| date | Wed, 27 Nov 2013 16:01:26 -0700 |
| parents | 86eb8814a05c |
| children | 55c1f9a321e9 |
comparison
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| 310:86eb8814a05c | 315:fcd103148aa6 |
|---|---|
| 378 linkscript.execsym = NULL; | 378 linkscript.execsym = NULL; |
| 379 } | 379 } |
| 380 } | 380 } |
| 381 else if (!strcmp(line, "section")) | 381 else if (!strcmp(line, "section")) |
| 382 { | 382 { |
| 383 int growsdown = 0; | |
| 383 // section | 384 // section |
| 384 // parse out the section name and flags | 385 // parse out the section name and flags |
| 385 for (ptr2 = ptr; *ptr2 && !isspace(*ptr2); ptr2++) | 386 for (ptr2 = ptr; *ptr2 && !isspace(*ptr2); ptr2++) |
| 386 /* do nothing */ ; | 387 /* do nothing */ ; |
| 387 | 388 |
| 402 ptr2 += 4; | 403 ptr2 += 4; |
| 403 while (*ptr2 && isspace(*ptr2)) | 404 while (*ptr2 && isspace(*ptr2)) |
| 404 ptr2++; | 405 ptr2++; |
| 405 | 406 |
| 406 } | 407 } |
| 408 else if (!strncmp(ptr2, "high", 4)) | |
| 409 { | |
| 410 ptr2 += 4; | |
| 411 while (*ptr2 && isspace(*ptr2)) | |
| 412 ptr2++; | |
| 413 growsdown = 1; | |
| 414 } | |
| 407 else | 415 else |
| 408 { | 416 { |
| 409 fprintf(stderr, "%s: bad script\n", scriptfile); | 417 fprintf(stderr, "%s: bad script\n", scriptfile); |
| 410 exit(1); | 418 exit(1); |
| 411 } | 419 } |
| 420 } | |
| 421 else | |
| 422 { | |
| 423 if (linkscript.nlines > 0) | |
| 424 growsdown = linkscript.lines[linkscript.nlines - 1].growsdown; | |
| 412 } | 425 } |
| 413 | 426 |
| 414 // now ptr2 points to the load address if there is one | 427 // now ptr2 points to the load address if there is one |
| 415 // or NUL if not | 428 // or NUL if not |
| 416 linkscript.lines = lw_realloc(linkscript.lines, sizeof(struct scriptline_s) * (linkscript.nlines + 1)); | 429 linkscript.lines = lw_realloc(linkscript.lines, sizeof(struct scriptline_s) * (linkscript.nlines + 1)); |
| 417 | 430 |
| 418 linkscript.lines[linkscript.nlines].noflags = 0; | 431 linkscript.lines[linkscript.nlines].noflags = 0; |
| 419 linkscript.lines[linkscript.nlines].yesflags = 0; | 432 linkscript.lines[linkscript.nlines].yesflags = 0; |
| 433 linkscript.lines[linkscript.nlines].growsdown = growsdown; | |
| 420 if (*ptr2) | 434 if (*ptr2) |
| 421 linkscript.lines[linkscript.nlines].loadat = strtol(ptr2, NULL, 16); | 435 linkscript.lines[linkscript.nlines].loadat = strtol(ptr2, NULL, 16); |
| 422 else | 436 else |
| 423 linkscript.lines[linkscript.nlines].loadat = -1; | 437 linkscript.lines[linkscript.nlines].loadat = -1; |
| 424 for (ptr2 = ptr; *ptr2 && *ptr2 != ','; ptr2++) | 438 for (ptr2 = ptr; *ptr2 && *ptr2 != ','; ptr2++) |