Commit | Line | Data |
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7ea0db89 | 1 | #ifndef lint |
175b0d05 | 2 | static char sccsid[] = "@(#)ld.c 4.10 %G%"; |
7ea0db89 | 3 | #endif |
c0278934 | 4 | |
c4e4978a | 5 | /* |
a8cefc6a | 6 | * ld - string table version for VAX |
c4e4978a BJ |
7 | */ |
8 | ||
9 | #include <sys/types.h> | |
10 | #include <signal.h> | |
11 | #include <stdio.h> | |
12 | #include <ctype.h> | |
537f7e17 BJ |
13 | #include <ar.h> |
14 | #include <a.out.h> | |
c4e4978a | 15 | #include <ranlib.h> |
05cbc547 | 16 | #include <sys/stat.h> |
c4e4978a BJ |
17 | |
18 | /* | |
19 | * Basic strategy: | |
20 | * | |
21 | * The loader takes a number of files and libraries as arguments. | |
22 | * A first pass examines each file in turn. Normal files are | |
23 | * unconditionally loaded, and the (external) symbols they define and require | |
24 | * are noted in the symbol table. Libraries are searched, and the | |
25 | * library members which define needed symbols are remembered | |
26 | * in a special data structure so they can be selected on the second | |
27 | * pass. Symbols defined and required by library members are also | |
28 | * recorded. | |
29 | * | |
30 | * After the first pass, the loader knows the size of the basic text | |
31 | * data, and bss segments from the sum of the sizes of the modules which | |
32 | * were required. It has computed, for each ``common'' symbol, the | |
33 | * maximum size of any reference to it, and these symbols are then assigned | |
34 | * storage locations after their sizes are appropriately rounded. | |
35 | * The loader now knows all sizes for the eventual output file, and | |
36 | * can determine the final locations of external symbols before it | |
37 | * begins a second pass. | |
38 | * | |
39 | * On the second pass each normal file and required library member | |
40 | * is processed again. The symbol table for each such file is | |
41 | * reread and relevant parts of it are placed in the output. The offsets | |
42 | * in the local symbol table for externally defined symbols are recorded | |
43 | * since relocation information refers to symbols in this way. | |
44 | * Armed with all necessary information, the text and data segments | |
45 | * are relocated and the result is placed in the output file, which | |
46 | * is pasted together, ``in place'', by writing to it in several | |
47 | * different places concurrently. | |
48 | */ | |
49 | ||
50 | /* | |
51 | * Internal data structures | |
52 | * | |
53 | * All internal data structures are segmented and dynamically extended. | |
54 | * The basic structures hold 1103 (NSYM) symbols, ~~200 (NROUT) | |
55 | * referenced library members, and 100 (NSYMPR) private (local) symbols | |
56 | * per object module. For large programs and/or modules, these structures | |
57 | * expand to be up to 40 (NSEG) times as large as this as necessary. | |
58 | */ | |
59 | #define NSEG 40 /* Number of segments, each data structure */ | |
60 | #define NSYM 1103 /* Number of symbols per segment */ | |
61 | #define NROUT 250 /* Number of library references per segment */ | |
62 | #define NSYMPR 100 /* Number of private symbols per segment */ | |
63 | ||
64 | /* | |
65 | * Structure describing each symbol table segment. | |
66 | * Each segment has its own hash table. We record the first | |
67 | * address in and first address beyond both the symbol and hash | |
68 | * tables, for use in the routine symx and the lookup routine respectively. | |
69 | * The symfree routine also understands this structure well as it used | |
70 | * to back out symbols from modules we decide that we don't need in pass 1. | |
71 | * | |
72 | * Csymseg points to the current symbol table segment; | |
73 | * csymseg->sy_first[csymseg->sy_used] is the next symbol slot to be allocated, | |
74 | * (unless csymseg->sy_used == NSYM in which case we will allocate another | |
75 | * symbol table segment first.) | |
76 | */ | |
77 | struct symseg { | |
78 | struct nlist *sy_first; /* base of this alloc'ed segment */ | |
79 | struct nlist *sy_last; /* end of this segment, for n_strx */ | |
80 | int sy_used; /* symbols used in this seg */ | |
81 | struct nlist **sy_hfirst; /* base of hash table, this seg */ | |
82 | struct nlist **sy_hlast; /* end of hash table, this seg */ | |
83 | } symseg[NSEG], *csymseg; | |
84 | ||
85 | /* | |
86 | * The lookup routine uses quadratic rehash. Since a quadratic rehash | |
87 | * only probes 1/2 of the buckets in the table, and since the hash | |
88 | * table is segmented the same way the symbol table is, we make the | |
89 | * hash table have twice as many buckets as there are symbol table slots | |
90 | * in the segment. This guarantees that the quadratic rehash will never | |
91 | * fail to find an empty bucket if the segment is not full and the | |
92 | * symbol is not there. | |
93 | */ | |
94 | #define HSIZE (NSYM*2) | |
95 | ||
96 | /* | |
97 | * Xsym converts symbol table indices (ala x) into symbol table pointers. | |
98 | * Symx (harder, but never used in loops) inverts pointers into the symbol | |
99 | * table into indices using the symseg[] structure. | |
100 | */ | |
101 | #define xsym(x) (symseg[(x)/NSYM].sy_first+((x)%NSYM)) | |
102 | /* symx() is a function, defined below */ | |
103 | ||
104 | struct nlist cursym; /* current symbol */ | |
105 | struct nlist *lastsym; /* last symbol entered */ | |
106 | struct nlist *nextsym; /* next available symbol table entry */ | |
107 | struct nlist *addsym; /* first sym defined during incr load */ | |
108 | int nsym; /* pass2: number of local symbols in a.out */ | |
109 | /* nsym + symx(nextsym) is the symbol table size during pass2 */ | |
110 | ||
111 | struct nlist **lookup(), **slookup(); | |
537f7e17 | 112 | struct nlist *p_etext, *p_edata, *p_end, *entrypt; |
c4e4978a BJ |
113 | |
114 | /* | |
115 | * Definitions of segmentation for library member table. | |
116 | * For each library we encounter on pass 1 we record pointers to all | |
117 | * members which we will load on pass 2. These are recorded as offsets | |
118 | * into the archive in the library member table. Libraries are | |
119 | * separated in the table by the special offset value -1. | |
120 | */ | |
121 | off_t li_init[NROUT]; | |
122 | struct libseg { | |
123 | off_t *li_first; | |
124 | int li_used; | |
125 | int li_used2; | |
126 | } libseg[NSEG] = { | |
127 | li_init, 0, 0, | |
128 | }, *clibseg = libseg; | |
129 | ||
130 | /* | |
131 | * In processing each module on pass 2 we must relocate references | |
132 | * relative to external symbols. These references are recorded | |
133 | * in the relocation information as relative to local symbol numbers | |
134 | * assigned to the external symbols when the module was created. | |
135 | * Thus before relocating the module in pass 2 we create a table | |
136 | * which maps these internal numbers to symbol table entries. | |
137 | * A hash table is constructed, based on the local symbol table indices, | |
138 | * for quick lookup of these symbols. | |
c4e4978a BJ |
139 | */ |
140 | #define LHSIZ 31 | |
141 | struct local { | |
142 | int l_index; /* index to symbol in file */ | |
143 | struct nlist *l_symbol; /* ptr to symbol table */ | |
144 | struct local *l_link; /* hash link */ | |
145 | } *lochash[LHSIZ], lhinit[NSYMPR]; | |
146 | struct locseg { | |
147 | struct local *lo_first; | |
148 | int lo_used; | |
149 | } locseg[NSEG] = { | |
150 | lhinit, 0 | |
151 | }, *clocseg; | |
152 | ||
153 | /* | |
154 | * Libraries are typically built with a table of contents, | |
155 | * which is the first member of a library with special file | |
156 | * name __.SYMDEF and contains a list of symbol names | |
157 | * and with each symbol the offset of the library member which defines | |
158 | * it. The loader uses this table to quickly tell which library members | |
159 | * are (potentially) useful. The alternative, examining the symbol | |
160 | * table of each library member, is painfully slow for large archives. | |
161 | * | |
162 | * See <ranlib.h> for the definition of the ranlib structure and an | |
163 | * explanation of the __.SYMDEF file format. | |
164 | */ | |
165 | int tnum; /* number of symbols in table of contents */ | |
166 | int ssiz; /* size of string table for table of contents */ | |
167 | struct ranlib *tab; /* the table of contents (dynamically allocated) */ | |
168 | char *tabstr; /* string table for table of contents */ | |
169 | ||
170 | /* | |
171 | * We open each input file or library only once, but in pass2 we | |
172 | * (historically) read from such a file at 2 different places at the | |
173 | * same time. These structures are remnants from those days, | |
537f7e17 | 174 | * and now serve only to catch ``Premature EOF''. |
c0278934 | 175 | * In order to make I/O more efficient, we provide routines which |
175b0d05 | 176 | * use the optimal block size returned by stat(). |
c4e4978a | 177 | */ |
c0278934 | 178 | #define BLKSIZE 1024 |
c4e4978a BJ |
179 | typedef struct { |
180 | short *fakeptr; | |
181 | int bno; | |
182 | int nibuf; | |
183 | int nuser; | |
175b0d05 RC |
184 | char *buff; |
185 | int bufsize; | |
c4e4978a BJ |
186 | } PAGE; |
187 | ||
188 | PAGE page[2]; | |
175b0d05 RC |
189 | int p_blksize; |
190 | int p_blkshift; | |
191 | int p_blkmask; | |
c4e4978a BJ |
192 | |
193 | struct { | |
194 | short *fakeptr; | |
195 | int bno; | |
196 | int nibuf; | |
197 | int nuser; | |
198 | } fpage; | |
199 | ||
200 | typedef struct { | |
201 | char *ptr; | |
202 | int bno; | |
203 | int nibuf; | |
204 | long size; | |
205 | long pos; | |
206 | PAGE *pno; | |
207 | } STREAM; | |
208 | ||
209 | STREAM text; | |
210 | STREAM reloc; | |
211 | ||
212 | /* | |
213 | * Header from the a.out and the archive it is from (if any). | |
214 | */ | |
215 | struct exec filhdr; | |
216 | struct ar_hdr archdr; | |
217 | #define OARMAG 0177545 | |
218 | ||
219 | /* | |
220 | * Options. | |
221 | */ | |
222 | int trace; | |
223 | int xflag; /* discard local symbols */ | |
224 | int Xflag; /* discard locals starting with 'L' */ | |
225 | int Sflag; /* discard all except locals and globals*/ | |
226 | int rflag; /* preserve relocation bits, don't define common */ | |
227 | int arflag; /* original copy of rflag */ | |
228 | int sflag; /* discard all symbols */ | |
a8cefc6a | 229 | int Mflag; /* print rudimentary load map */ |
c4e4978a BJ |
230 | int nflag; /* pure procedure */ |
231 | int dflag; /* define common even with rflag */ | |
537f7e17 | 232 | int zflag; /* demand paged */ |
c4e4978a BJ |
233 | long hsize; /* size of hole at beginning of data to be squashed */ |
234 | int Aflag; /* doing incremental load */ | |
537f7e17 | 235 | int Nflag; /* want impure a.out */ |
c4e4978a | 236 | int funding; /* reading fundamental file for incremental load */ |
a8cefc6a BJ |
237 | int yflag; /* number of symbols to be traced */ |
238 | char **ytab; /* the symbols */ | |
c4e4978a BJ |
239 | |
240 | /* | |
241 | * These are the cumulative sizes, set in pass 1, which | |
242 | * appear in the a.out header when the loader is finished. | |
243 | */ | |
244 | off_t tsize, dsize, bsize, trsize, drsize, ssize; | |
245 | ||
246 | /* | |
247 | * Symbol relocation: c?rel is a scale factor which is | |
248 | * added to an old relocation to convert it to new units; | |
249 | * i.e. it is the difference between segment origins. | |
537f7e17 BJ |
250 | * (Thus if we are loading from a data segment which began at location |
251 | * 4 in a .o file into an a.out where it will be loaded starting at | |
252 | * 1024, cdrel will be 1020.) | |
c4e4978a BJ |
253 | */ |
254 | long ctrel, cdrel, cbrel; | |
255 | ||
256 | /* | |
537f7e17 | 257 | * Textbase is the start address of all text, 0 unless given by -T. |
c4e4978a | 258 | * Database is the base of all data, computed before and used during pass2. |
537f7e17 BJ |
259 | */ |
260 | long textbase, database; | |
261 | ||
262 | /* | |
c4e4978a BJ |
263 | * The base addresses for the loaded text, data and bss from the |
264 | * current module during pass2 are given by torigin, dorigin and borigin. | |
265 | */ | |
c4e4978a BJ |
266 | long torigin, dorigin, borigin; |
267 | ||
268 | /* | |
269 | * Errlev is nonzero when errors have occured. | |
270 | * Delarg is an implicit argument to the routine delexit | |
271 | * which is called on error. We do ``delarg = errlev'' before normal | |
272 | * exits, and only if delarg is 0 (i.e. errlev was 0) do we make the | |
273 | * result file executable. | |
274 | */ | |
275 | int errlev; | |
276 | int delarg = 4; | |
277 | ||
278 | /* | |
279 | * The biobuf structure and associated routines are used to write | |
280 | * into one file at several places concurrently. Calling bopen | |
281 | * with a biobuf structure sets it up to write ``biofd'' starting | |
282 | * at the specified offset. You can then use ``bwrite'' and/or ``bputc'' | |
283 | * to stuff characters in the stream, much like ``fwrite'' and ``fputc''. | |
284 | * Calling bflush drains all the buffers and MUST be done before exit. | |
285 | */ | |
286 | struct biobuf { | |
287 | short b_nleft; /* Number free spaces left in b_buf */ | |
175b0d05 | 288 | /* Initialize to be less than b_bufsize initially, to boundary align in file */ |
c4e4978a | 289 | char *b_ptr; /* Next place to stuff characters */ |
175b0d05 RC |
290 | char *b_buf; /* Pointer to the buffer */ |
291 | int b_bufsize; /* Size of the buffer */ | |
c4e4978a BJ |
292 | off_t b_off; /* Current file offset */ |
293 | struct biobuf *b_link; /* Link in chain for bflush() */ | |
294 | } *biobufs; | |
295 | #define bputc(c,b) ((b)->b_nleft ? (--(b)->b_nleft, *(b)->b_ptr++ = (c)) \ | |
296 | : bflushc(b, c)) | |
297 | int biofd; | |
298 | off_t boffset; | |
299 | struct biobuf *tout, *dout, *trout, *drout, *sout, *strout; | |
300 | ||
301 | /* | |
302 | * Offset is the current offset in the string file. | |
303 | * Its initial value reflects the fact that we will | |
304 | * eventually stuff the size of the string table at the | |
305 | * beginning of the string table (i.e. offset itself!). | |
306 | */ | |
307 | off_t offset = sizeof (off_t); | |
308 | ||
309 | int ofilfnd; /* -o given; otherwise move l.out to a.out */ | |
310 | char *ofilename = "l.out"; | |
68694648 | 311 | int ofilemode; /* respect umask even for unsucessful ld's */ |
c4e4978a BJ |
312 | int infil; /* current input file descriptor */ |
313 | char *filname; /* and its name */ | |
314 | ||
315 | /* | |
316 | * Base of the string table of the current module (pass1 and pass2). | |
317 | */ | |
318 | char *curstr; | |
319 | ||
7ea0db89 SL |
320 | /* |
321 | * System software page size, as returned by getpagesize. | |
322 | */ | |
323 | int pagesize; | |
324 | ||
c4e4978a BJ |
325 | char get(); |
326 | int delexit(); | |
327 | char *savestr(); | |
328 | ||
329 | main(argc, argv) | |
330 | char **argv; | |
331 | { | |
332 | register int c, i; | |
333 | int num; | |
334 | register char *ap, **p; | |
335 | char save; | |
336 | ||
537f7e17 | 337 | if (signal(SIGINT, SIG_IGN) != SIG_IGN) { |
c4e4978a | 338 | signal(SIGINT, delexit); |
537f7e17 BJ |
339 | signal(SIGTERM, delexit); |
340 | } | |
c4e4978a BJ |
341 | if (argc == 1) |
342 | exit(4); | |
343 | p = argv+1; | |
7ea0db89 | 344 | pagesize = getpagesize(); |
c4e4978a | 345 | |
537f7e17 BJ |
346 | /* |
347 | * Scan files once to find where symbols are defined. | |
348 | */ | |
c4e4978a BJ |
349 | for (c=1; c<argc; c++) { |
350 | if (trace) | |
351 | printf("%s:\n", *p); | |
352 | filname = 0; | |
353 | ap = *p++; | |
354 | if (*ap != '-') { | |
355 | load1arg(ap); | |
356 | continue; | |
357 | } | |
358 | for (i=1; ap[i]; i++) switch (ap[i]) { | |
359 | ||
360 | case 'o': | |
361 | if (++c >= argc) | |
362 | error(1, "-o where?"); | |
363 | ofilename = *p++; | |
364 | ofilfnd++; | |
365 | continue; | |
366 | case 'u': | |
367 | case 'e': | |
368 | if (++c >= argc) | |
369 | error(1, "-u or -c: arg missing"); | |
370 | enter(slookup(*p++)); | |
371 | if (ap[i]=='e') | |
372 | entrypt = lastsym; | |
373 | continue; | |
374 | case 'H': | |
375 | if (++c >= argc) | |
376 | error(1, "-H: arg missing"); | |
377 | if (tsize!=0) | |
378 | error(1, "-H: too late, some text already loaded"); | |
379 | hsize = atoi(*p++); | |
380 | continue; | |
381 | case 'A': | |
382 | if (++c >= argc) | |
383 | error(1, "-A: arg missing"); | |
384 | if (Aflag) | |
385 | error(1, "-A: only one base file allowed"); | |
386 | Aflag = 1; | |
387 | nflag = 0; | |
388 | funding = 1; | |
389 | load1arg(*p++); | |
390 | trsize = drsize = tsize = dsize = bsize = 0; | |
391 | ctrel = cdrel = cbrel = 0; | |
392 | funding = 0; | |
393 | addsym = nextsym; | |
394 | continue; | |
395 | case 'D': | |
396 | if (++c >= argc) | |
397 | error(1, "-D: arg missing"); | |
398 | num = htoi(*p++); | |
399 | if (dsize > num) | |
400 | error(1, "-D: too small"); | |
401 | dsize = num; | |
402 | continue; | |
403 | case 'T': | |
404 | if (++c >= argc) | |
405 | error(1, "-T: arg missing"); | |
406 | if (tsize!=0) | |
407 | error(1, "-T: too late, some text already loaded"); | |
408 | textbase = htoi(*p++); | |
409 | continue; | |
410 | case 'l': | |
411 | save = ap[--i]; | |
412 | ap[i]='-'; | |
413 | load1arg(&ap[i]); | |
414 | ap[i]=save; | |
415 | goto next; | |
a8cefc6a BJ |
416 | case 'M': |
417 | Mflag++; | |
418 | continue; | |
c4e4978a BJ |
419 | case 'x': |
420 | xflag++; | |
421 | continue; | |
422 | case 'X': | |
423 | Xflag++; | |
424 | continue; | |
425 | case 'S': | |
426 | Sflag++; | |
427 | continue; | |
428 | case 'r': | |
429 | rflag++; | |
430 | arflag++; | |
c4e4978a BJ |
431 | continue; |
432 | case 's': | |
433 | sflag++; | |
434 | xflag++; | |
435 | continue; | |
436 | case 'n': | |
437 | nflag++; | |
537f7e17 | 438 | Nflag = zflag = 0; |
c4e4978a BJ |
439 | continue; |
440 | case 'N': | |
537f7e17 BJ |
441 | Nflag++; |
442 | nflag = zflag = 0; | |
c4e4978a BJ |
443 | continue; |
444 | case 'd': | |
445 | dflag++; | |
446 | continue; | |
447 | case 'i': | |
448 | printf("ld: -i ignored\n"); | |
449 | continue; | |
450 | case 't': | |
451 | trace++; | |
452 | continue; | |
a8cefc6a BJ |
453 | case 'y': |
454 | if (ap[i+1] == 0) | |
455 | error(1, "-y: symbol name missing"); | |
456 | if (yflag == 0) { | |
457 | ytab = (char **)calloc(argc, sizeof (char **)); | |
458 | if (ytab == 0) | |
459 | error(1, "ran out of memory (-y)"); | |
460 | } | |
461 | ytab[yflag++] = &ap[i+1]; | |
462 | goto next; | |
c4e4978a BJ |
463 | case 'z': |
464 | zflag++; | |
537f7e17 | 465 | Nflag = nflag = 0; |
c4e4978a BJ |
466 | continue; |
467 | default: | |
468 | filname = savestr("-x"); /* kludge */ | |
469 | filname[1] = ap[i]; /* kludge */ | |
470 | archdr.ar_name[0] = 0; /* kludge */ | |
471 | error(1, "bad flag"); | |
472 | } | |
473 | next: | |
474 | ; | |
475 | } | |
537f7e17 BJ |
476 | if (rflag == 0 && Nflag == 0 && nflag == 0) |
477 | zflag++; | |
c4e4978a BJ |
478 | endload(argc, argv); |
479 | exit(0); | |
480 | } | |
481 | ||
482 | /* | |
483 | * Convert a ascii string which is a hex number. | |
484 | * Used by -T and -D options. | |
485 | */ | |
486 | htoi(p) | |
487 | register char *p; | |
488 | { | |
489 | register int c, n; | |
490 | ||
491 | n = 0; | |
492 | while (c = *p++) { | |
493 | n <<= 4; | |
494 | if (isdigit(c)) | |
495 | n += c - '0'; | |
496 | else if (c >= 'a' && c <= 'f') | |
497 | n += 10 + (c - 'a'); | |
498 | else if (c >= 'A' && c <= 'F') | |
499 | n += 10 + (c - 'A'); | |
500 | else | |
501 | error(1, "badly formed hex number"); | |
502 | } | |
503 | return (n); | |
504 | } | |
505 | ||
506 | delexit() | |
507 | { | |
a7acd2d7 KM |
508 | struct stat stbuf; |
509 | long size; | |
510 | char c = 0; | |
c4e4978a BJ |
511 | |
512 | bflush(); | |
513 | unlink("l.out"); | |
514 | if (delarg==0 && Aflag==0) | |
68694648 | 515 | chmod(ofilename, ofilemode); |
a7acd2d7 KM |
516 | /* |
517 | * We have to insure that the last block of the data segment | |
175b0d05 RC |
518 | * is allocated a full pagesize block. If the underlying |
519 | * file system allocates frags that are smaller than pagesize, | |
520 | * a full zero filled pagesize block needs to be allocated so | |
a7acd2d7 KM |
521 | * that when it is demand paged, the paged in block will be |
522 | * appropriately filled with zeros. | |
523 | */ | |
524 | fstat(biofd, &stbuf); | |
175b0d05 | 525 | size = round(stbuf.st_size, pagesize); |
c5aa50e2 | 526 | if (!rflag && size > stbuf.st_size) { |
a7acd2d7 KM |
527 | lseek(biofd, size - 1, 0); |
528 | write(biofd, &c, 1); | |
529 | } | |
c4e4978a BJ |
530 | exit (delarg); |
531 | } | |
532 | ||
533 | endload(argc, argv) | |
534 | int argc; | |
535 | char **argv; | |
536 | { | |
537 | register int c, i; | |
538 | long dnum; | |
539 | register char *ap, **p; | |
540 | ||
541 | clibseg = libseg; | |
542 | filname = 0; | |
543 | middle(); | |
544 | setupout(); | |
545 | p = argv+1; | |
546 | for (c=1; c<argc; c++) { | |
547 | ap = *p++; | |
548 | if (trace) | |
549 | printf("%s:\n", ap); | |
550 | if (*ap != '-') { | |
551 | load2arg(ap); | |
552 | continue; | |
553 | } | |
554 | for (i=1; ap[i]; i++) switch (ap[i]) { | |
555 | ||
556 | case 'D': | |
557 | dnum = htoi(*p); | |
558 | if (dorigin < dnum) | |
559 | while (dorigin < dnum) | |
560 | bputc(0, dout), dorigin++; | |
561 | /* fall into ... */ | |
562 | case 'T': | |
563 | case 'u': | |
564 | case 'e': | |
565 | case 'o': | |
566 | case 'H': | |
567 | ++c; | |
568 | ++p; | |
569 | /* fall into ... */ | |
570 | default: | |
571 | continue; | |
572 | case 'A': | |
573 | funding = 1; | |
574 | load2arg(*p++); | |
575 | funding = 0; | |
576 | c++; | |
577 | continue; | |
a8cefc6a BJ |
578 | case 'y': |
579 | goto next; | |
c4e4978a BJ |
580 | case 'l': |
581 | ap[--i]='-'; | |
582 | load2arg(&ap[i]); | |
583 | goto next; | |
584 | } | |
585 | next: | |
586 | ; | |
587 | } | |
588 | finishout(); | |
589 | } | |
590 | ||
591 | /* | |
592 | * Scan file to find defined symbols. | |
593 | */ | |
594 | load1arg(cp) | |
595 | register char *cp; | |
596 | { | |
597 | register struct ranlib *tp; | |
598 | off_t nloc; | |
a8cefc6a | 599 | int kind; |
c4e4978a | 600 | |
a8cefc6a BJ |
601 | kind = getfile(cp); |
602 | if (Mflag) | |
603 | printf("%s\n", filname); | |
604 | switch (kind) { | |
c4e4978a BJ |
605 | |
606 | /* | |
607 | * Plain file. | |
608 | */ | |
609 | case 0: | |
610 | load1(0, 0L); | |
611 | break; | |
612 | ||
613 | /* | |
614 | * Archive without table of contents. | |
615 | * (Slowly) process each member. | |
616 | */ | |
617 | case 1: | |
a8cefc6a BJ |
618 | error(-1, |
619 | "warning: archive has no table of contents; add one using ranlib(1)"); | |
c4e4978a BJ |
620 | nloc = SARMAG; |
621 | while (step(nloc)) | |
622 | nloc += sizeof(archdr) + | |
623 | round(atol(archdr.ar_size), sizeof (short)); | |
624 | break; | |
625 | ||
626 | /* | |
627 | * Archive with table of contents. | |
628 | * Read the table of contents and its associated string table. | |
629 | * Pass through the library resolving symbols until nothing changes | |
630 | * for an entire pass (i.e. you can get away with backward references | |
631 | * when there is a table of contents!) | |
632 | */ | |
633 | case 2: | |
634 | nloc = SARMAG + sizeof (archdr); | |
635 | dseek(&text, nloc, sizeof (tnum)); | |
636 | mget((char *)&tnum, sizeof (tnum), &text); | |
637 | nloc += sizeof (tnum); | |
638 | tab = (struct ranlib *)malloc(tnum); | |
639 | if (tab == 0) | |
640 | error(1, "ran out of memory (toc)"); | |
641 | dseek(&text, nloc, tnum); | |
642 | mget((char *)tab, tnum, &text); | |
643 | nloc += tnum; | |
644 | tnum /= sizeof (struct ranlib); | |
645 | dseek(&text, nloc, sizeof (ssiz)); | |
646 | mget((char *)&ssiz, sizeof (ssiz), &text); | |
647 | nloc += sizeof (ssiz); | |
648 | tabstr = (char *)malloc(ssiz); | |
649 | if (tabstr == 0) | |
650 | error(1, "ran out of memory (tocstr)"); | |
651 | dseek(&text, nloc, ssiz); | |
652 | mget((char *)tabstr, ssiz, &text); | |
653 | for (tp = &tab[tnum]; --tp >= tab;) { | |
654 | if (tp->ran_un.ran_strx < 0 || | |
655 | tp->ran_un.ran_strx >= ssiz) | |
656 | error(1, "mangled archive table of contents"); | |
657 | tp->ran_un.ran_name = tabstr + tp->ran_un.ran_strx; | |
658 | } | |
659 | while (ldrand()) | |
660 | continue; | |
661 | cfree((char *)tab); | |
662 | cfree(tabstr); | |
663 | nextlibp(-1); | |
664 | break; | |
665 | ||
666 | /* | |
667 | * Table of contents is out of date, so search | |
668 | * as a normal library (but skip the __.SYMDEF file). | |
669 | */ | |
670 | case 3: | |
a8cefc6a BJ |
671 | error(-1, |
672 | "warning: table of contents for archive is out of date; rerun ranlib(1)"); | |
c4e4978a BJ |
673 | nloc = SARMAG; |
674 | do | |
675 | nloc += sizeof(archdr) + | |
676 | round(atol(archdr.ar_size), sizeof(short)); | |
677 | while (step(nloc)); | |
678 | break; | |
679 | } | |
680 | close(infil); | |
681 | } | |
682 | ||
683 | /* | |
684 | * Advance to the next archive member, which | |
685 | * is at offset nloc in the archive. If the member | |
686 | * is useful, record its location in the liblist structure | |
687 | * for use in pass2. Mark the end of the archive in libilst with a -1. | |
688 | */ | |
689 | step(nloc) | |
690 | off_t nloc; | |
691 | { | |
692 | ||
693 | dseek(&text, nloc, (long) sizeof archdr); | |
694 | if (text.size <= 0) { | |
695 | nextlibp(-1); | |
696 | return (0); | |
697 | } | |
698 | getarhdr(); | |
699 | if (load1(1, nloc + (sizeof archdr))) | |
700 | nextlibp(nloc); | |
701 | return (1); | |
702 | } | |
703 | ||
704 | /* | |
705 | * Record the location of a useful archive member. | |
706 | * Recording -1 marks the end of files from an archive. | |
707 | * The liblist data structure is dynamically extended here. | |
708 | */ | |
709 | nextlibp(val) | |
710 | off_t val; | |
711 | { | |
712 | ||
713 | if (clibseg->li_used == NROUT) { | |
714 | if (++clibseg == &libseg[NSEG]) | |
715 | error(1, "too many files loaded from libraries"); | |
716 | clibseg->li_first = (off_t *)malloc(NROUT * sizeof (off_t)); | |
717 | if (clibseg->li_first == 0) | |
718 | error(1, "ran out of memory (nextlibp)"); | |
719 | } | |
720 | clibseg->li_first[clibseg->li_used++] = val; | |
a8cefc6a BJ |
721 | if (val != -1 && Mflag) |
722 | printf("\t%s\n", archdr.ar_name); | |
c4e4978a BJ |
723 | } |
724 | ||
725 | /* | |
726 | * One pass over an archive with a table of contents. | |
727 | * Remember the number of symbols currently defined, | |
728 | * then call step on members which look promising (i.e. | |
729 | * that define a symbol which is currently externally undefined). | |
730 | * Indicate to our caller whether this process netted any more symbols. | |
731 | */ | |
732 | ldrand() | |
733 | { | |
734 | register struct nlist *sp, **hp; | |
735 | register struct ranlib *tp, *tplast; | |
736 | off_t loc; | |
737 | int nsymt = symx(nextsym); | |
738 | ||
739 | tplast = &tab[tnum-1]; | |
740 | for (tp = tab; tp <= tplast; tp++) { | |
741 | if ((hp = slookup(tp->ran_un.ran_name)) == 0) | |
742 | continue; | |
743 | sp = *hp; | |
744 | if (sp->n_type != N_EXT+N_UNDF) | |
745 | continue; | |
746 | step(tp->ran_off); | |
747 | loc = tp->ran_off; | |
748 | while (tp < tplast && (tp+1)->ran_off == loc) | |
749 | tp++; | |
750 | } | |
751 | return (symx(nextsym) != nsymt); | |
752 | } | |
753 | ||
754 | /* | |
755 | * Examine a single file or archive member on pass 1. | |
756 | */ | |
757 | load1(libflg, loc) | |
758 | off_t loc; | |
759 | { | |
760 | register struct nlist *sp; | |
761 | struct nlist *savnext; | |
762 | int ndef, nlocal, type, size, nsymt; | |
763 | register int i; | |
764 | off_t maxoff; | |
765 | struct stat stb; | |
766 | ||
767 | readhdr(loc); | |
768 | if (filhdr.a_syms == 0) { | |
769 | if (filhdr.a_text+filhdr.a_data == 0) | |
770 | return (0); | |
771 | error(1, "no namelist"); | |
772 | } | |
773 | if (libflg) | |
774 | maxoff = atol(archdr.ar_size); | |
775 | else { | |
776 | fstat(infil, &stb); | |
777 | maxoff = stb.st_size; | |
778 | } | |
779 | if (N_STROFF(filhdr) + sizeof (off_t) >= maxoff) | |
780 | error(1, "too small (old format .o?)"); | |
781 | ctrel = tsize; cdrel += dsize; cbrel += bsize; | |
782 | ndef = 0; | |
783 | nlocal = sizeof(cursym); | |
784 | savnext = nextsym; | |
785 | loc += N_SYMOFF(filhdr); | |
786 | dseek(&text, loc, filhdr.a_syms); | |
787 | dseek(&reloc, loc + filhdr.a_syms, sizeof(off_t)); | |
788 | mget(&size, sizeof (size), &reloc); | |
789 | dseek(&reloc, loc + filhdr.a_syms+sizeof (off_t), size-sizeof (off_t)); | |
790 | curstr = (char *)malloc(size); | |
791 | if (curstr == NULL) | |
792 | error(1, "no space for string table"); | |
793 | mget(curstr+sizeof(off_t), size-sizeof(off_t), &reloc); | |
794 | while (text.size > 0) { | |
795 | mget((char *)&cursym, sizeof(struct nlist), &text); | |
796 | if (cursym.n_un.n_strx) { | |
797 | if (cursym.n_un.n_strx<sizeof(size) || | |
798 | cursym.n_un.n_strx>=size) | |
799 | error(1, "bad string table index (pass 1)"); | |
800 | cursym.n_un.n_name = curstr + cursym.n_un.n_strx; | |
801 | } | |
802 | type = cursym.n_type; | |
803 | if ((type&N_EXT)==0) { | |
804 | if (Xflag==0 || cursym.n_un.n_name[0]!='L' || | |
805 | type & N_STAB) | |
806 | nlocal += sizeof cursym; | |
807 | continue; | |
808 | } | |
809 | symreloc(); | |
810 | if (enter(lookup())) | |
811 | continue; | |
812 | if ((sp = lastsym)->n_type != N_EXT+N_UNDF) | |
813 | continue; | |
814 | if (cursym.n_type == N_EXT+N_UNDF) { | |
815 | if (cursym.n_value > sp->n_value) | |
816 | sp->n_value = cursym.n_value; | |
817 | continue; | |
818 | } | |
819 | if (sp->n_value != 0 && cursym.n_type == N_EXT+N_TEXT) | |
820 | continue; | |
821 | ndef++; | |
822 | sp->n_type = cursym.n_type; | |
823 | sp->n_value = cursym.n_value; | |
824 | } | |
825 | if (libflg==0 || ndef) { | |
826 | tsize += filhdr.a_text; | |
827 | dsize += round(filhdr.a_data, sizeof (long)); | |
828 | bsize += round(filhdr.a_bss, sizeof (long)); | |
829 | ssize += nlocal; | |
830 | trsize += filhdr.a_trsize; | |
831 | drsize += filhdr.a_drsize; | |
832 | if (funding) | |
833 | textbase = (*slookup("_end"))->n_value; | |
834 | nsymt = symx(nextsym); | |
835 | for (i = symx(savnext); i < nsymt; i++) { | |
836 | sp = xsym(i); | |
837 | sp->n_un.n_name = savestr(sp->n_un.n_name); | |
838 | } | |
839 | free(curstr); | |
840 | return (1); | |
841 | } | |
842 | /* | |
843 | * No symbols defined by this library member. | |
844 | * Rip out the hash table entries and reset the symbol table. | |
845 | */ | |
846 | symfree(savnext); | |
847 | free(curstr); | |
848 | return(0); | |
849 | } | |
850 | ||
851 | middle() | |
852 | { | |
853 | register struct nlist *sp; | |
854 | long csize, t, corigin, ocsize; | |
855 | int nund, rnd; | |
856 | char s; | |
857 | register int i; | |
858 | int nsymt; | |
859 | ||
860 | torigin = 0; | |
861 | dorigin = 0; | |
862 | borigin = 0; | |
863 | ||
c4e4978a BJ |
864 | p_etext = *slookup("_etext"); |
865 | p_edata = *slookup("_edata"); | |
866 | p_end = *slookup("_end"); | |
867 | /* | |
868 | * If there are any undefined symbols, save the relocation bits. | |
869 | */ | |
870 | nsymt = symx(nextsym); | |
871 | if (rflag==0) { | |
872 | for (i = 0; i < nsymt; i++) { | |
873 | sp = xsym(i); | |
874 | if (sp->n_type==N_EXT+N_UNDF && sp->n_value==0 && | |
537f7e17 | 875 | sp!=p_end && sp!=p_edata && sp!=p_etext) { |
c4e4978a BJ |
876 | rflag++; |
877 | dflag = 0; | |
878 | break; | |
879 | } | |
880 | } | |
881 | } | |
882 | if (rflag) | |
883 | sflag = zflag = 0; | |
884 | /* | |
885 | * Assign common locations. | |
886 | */ | |
887 | csize = 0; | |
888 | if (!Aflag) | |
889 | addsym = symseg[0].sy_first; | |
890 | database = round(tsize+textbase, | |
7ea0db89 | 891 | (nflag||zflag? pagesize : sizeof (long))); |
c4e4978a BJ |
892 | database += hsize; |
893 | if (dflag || rflag==0) { | |
c4e4978a BJ |
894 | ldrsym(p_etext, tsize, N_EXT+N_TEXT); |
895 | ldrsym(p_edata, dsize, N_EXT+N_DATA); | |
896 | ldrsym(p_end, bsize, N_EXT+N_BSS); | |
897 | for (i = symx(addsym); i < nsymt; i++) { | |
898 | sp = xsym(i); | |
899 | if ((s=sp->n_type)==N_EXT+N_UNDF && | |
900 | (t = sp->n_value)!=0) { | |
901 | if (t >= sizeof (double)) | |
902 | rnd = sizeof (double); | |
903 | else if (t >= sizeof (long)) | |
904 | rnd = sizeof (long); | |
905 | else | |
906 | rnd = sizeof (short); | |
907 | csize = round(csize, rnd); | |
908 | sp->n_value = csize; | |
909 | sp->n_type = N_EXT+N_COMM; | |
910 | ocsize = csize; | |
911 | csize += t; | |
912 | } | |
913 | if (s&N_EXT && (s&N_TYPE)==N_UNDF && s&N_STAB) { | |
914 | sp->n_value = ocsize; | |
915 | sp->n_type = (s&N_STAB) | (N_EXT+N_COMM); | |
916 | } | |
917 | } | |
918 | } | |
919 | /* | |
920 | * Now set symbols to their final value | |
921 | */ | |
922 | csize = round(csize, sizeof (long)); | |
923 | torigin = textbase; | |
924 | dorigin = database; | |
925 | corigin = dorigin + dsize; | |
926 | borigin = corigin + csize; | |
927 | nund = 0; | |
928 | nsymt = symx(nextsym); | |
929 | for (i = symx(addsym); i<nsymt; i++) { | |
930 | sp = xsym(i); | |
931 | switch (sp->n_type & (N_TYPE+N_EXT)) { | |
932 | ||
933 | case N_EXT+N_UNDF: | |
45e82142 RE |
934 | if (arflag == 0) |
935 | errlev |= 01; | |
c4e4978a | 936 | if ((arflag==0 || dflag) && sp->n_value==0) { |
537f7e17 BJ |
937 | if (sp==p_end || sp==p_etext || sp==p_edata) |
938 | continue; | |
c4e4978a BJ |
939 | if (nund==0) |
940 | printf("Undefined:\n"); | |
941 | nund++; | |
942 | printf("%s\n", sp->n_un.n_name); | |
943 | } | |
944 | continue; | |
945 | case N_EXT+N_ABS: | |
946 | default: | |
947 | continue; | |
948 | case N_EXT+N_TEXT: | |
949 | sp->n_value += torigin; | |
950 | continue; | |
951 | case N_EXT+N_DATA: | |
952 | sp->n_value += dorigin; | |
953 | continue; | |
954 | case N_EXT+N_BSS: | |
955 | sp->n_value += borigin; | |
956 | continue; | |
957 | case N_EXT+N_COMM: | |
958 | sp->n_type = (sp->n_type & N_STAB) | (N_EXT+N_BSS); | |
959 | sp->n_value += corigin; | |
960 | continue; | |
961 | } | |
962 | } | |
963 | if (sflag || xflag) | |
964 | ssize = 0; | |
965 | bsize += csize; | |
966 | nsym = ssize / (sizeof cursym); | |
967 | if (Aflag) { | |
c4e4978a BJ |
968 | fixspec(p_etext,torigin); |
969 | fixspec(p_edata,dorigin); | |
970 | fixspec(p_end,borigin); | |
971 | } | |
972 | } | |
973 | ||
974 | fixspec(sym,offset) | |
975 | struct nlist *sym; | |
976 | long offset; | |
977 | { | |
978 | ||
979 | if(symx(sym) < symx(addsym) && sym!=0) | |
980 | sym->n_value += offset; | |
981 | } | |
982 | ||
983 | ldrsym(sp, val, type) | |
984 | register struct nlist *sp; | |
985 | long val; | |
986 | { | |
987 | ||
988 | if (sp == 0) | |
989 | return; | |
990 | if ((sp->n_type != N_EXT+N_UNDF || sp->n_value) && !Aflag) { | |
991 | printf("%s: ", sp->n_un.n_name); | |
992 | error(0, "user attempt to redfine loader-defined symbol"); | |
993 | return; | |
994 | } | |
995 | sp->n_type = type; | |
996 | sp->n_value = val; | |
997 | } | |
998 | ||
999 | off_t wroff; | |
1000 | struct biobuf toutb; | |
1001 | ||
1002 | setupout() | |
1003 | { | |
1004 | int bss; | |
175b0d05 | 1005 | struct stat stbuf; |
a8cefc6a BJ |
1006 | extern char *sys_errlist[]; |
1007 | extern int errno; | |
c4e4978a | 1008 | |
68694648 KS |
1009 | ofilemode = 0777 & ~umask(0); |
1010 | biofd = creat(ofilename, 0666 & ofilemode); | |
a8cefc6a BJ |
1011 | if (biofd < 0) { |
1012 | filname = ofilename; /* kludge */ | |
1013 | archdr.ar_name[0] = 0; /* kludge */ | |
1014 | error(1, sys_errlist[errno]); /* kludge */ | |
1015 | } | |
175b0d05 RC |
1016 | fstat(biofd, &stbuf); /* suppose file exists, wrong*/ |
1017 | if (stbuf.st_mode & 0111) { /* mode, ld fails? */ | |
1018 | chmod(ofilename, stbuf.st_mode & 0666); | |
1019 | ofilemode = stbuf.st_mode; | |
1020 | } | |
c4e4978a BJ |
1021 | filhdr.a_magic = nflag ? NMAGIC : (zflag ? ZMAGIC : OMAGIC); |
1022 | filhdr.a_text = nflag ? tsize : | |
7ea0db89 SL |
1023 | round(tsize, zflag ? pagesize : sizeof (long)); |
1024 | filhdr.a_data = zflag ? round(dsize, pagesize) : dsize; | |
c4e4978a BJ |
1025 | bss = bsize - (filhdr.a_data - dsize); |
1026 | if (bss < 0) | |
1027 | bss = 0; | |
1028 | filhdr.a_bss = bss; | |
1029 | filhdr.a_trsize = trsize; | |
1030 | filhdr.a_drsize = drsize; | |
1031 | filhdr.a_syms = sflag? 0: (ssize + (sizeof cursym)*symx(nextsym)); | |
1032 | if (entrypt) { | |
1033 | if (entrypt->n_type!=N_EXT+N_TEXT) | |
1034 | error(0, "entry point not in text"); | |
1035 | else | |
1036 | filhdr.a_entry = entrypt->n_value; | |
1037 | } else | |
1038 | filhdr.a_entry = 0; | |
1039 | filhdr.a_trsize = (rflag ? trsize:0); | |
1040 | filhdr.a_drsize = (rflag ? drsize:0); | |
175b0d05 RC |
1041 | tout = &toutb; |
1042 | bopen(tout, 0, stbuf.st_blksize); | |
c4e4978a | 1043 | bwrite((char *)&filhdr, sizeof (filhdr), tout); |
175b0d05 RC |
1044 | if (zflag) |
1045 | bseek(tout, pagesize); | |
c4e4978a | 1046 | wroff = N_TXTOFF(filhdr) + filhdr.a_text; |
175b0d05 | 1047 | outb(&dout, filhdr.a_data, stbuf.st_blksize); |
c4e4978a | 1048 | if (rflag) { |
175b0d05 RC |
1049 | outb(&trout, filhdr.a_trsize, stbuf.st_blksize); |
1050 | outb(&drout, filhdr.a_drsize, stbuf.st_blksize); | |
c4e4978a BJ |
1051 | } |
1052 | if (sflag==0 || xflag==0) { | |
175b0d05 | 1053 | outb(&sout, filhdr.a_syms, stbuf.st_blksize); |
c4e4978a | 1054 | wroff += sizeof (offset); |
175b0d05 | 1055 | outb(&strout, 0, stbuf.st_blksize); |
c4e4978a BJ |
1056 | } |
1057 | } | |
1058 | ||
175b0d05 | 1059 | outb(bp, inc, bufsize) |
c4e4978a BJ |
1060 | register struct biobuf **bp; |
1061 | { | |
1062 | ||
1063 | *bp = (struct biobuf *)malloc(sizeof (struct biobuf)); | |
1064 | if (*bp == 0) | |
1065 | error(1, "ran out of memory (outb)"); | |
175b0d05 | 1066 | bopen(*bp, wroff, bufsize); |
c4e4978a BJ |
1067 | wroff += inc; |
1068 | } | |
1069 | ||
1070 | load2arg(acp) | |
1071 | char *acp; | |
1072 | { | |
1073 | register char *cp; | |
1074 | off_t loc; | |
1075 | ||
1076 | cp = acp; | |
1077 | if (getfile(cp) == 0) { | |
1078 | while (*cp) | |
1079 | cp++; | |
1080 | while (cp >= acp && *--cp != '/'); | |
1081 | mkfsym(++cp); | |
1082 | load2(0L); | |
1083 | } else { /* scan archive members referenced */ | |
1084 | for (;;) { | |
1085 | if (clibseg->li_used2 == clibseg->li_used) { | |
1086 | if (clibseg->li_used < NROUT) | |
1087 | error(1, "libseg botch"); | |
1088 | clibseg++; | |
1089 | } | |
1090 | loc = clibseg->li_first[clibseg->li_used2++]; | |
1091 | if (loc == -1) | |
1092 | break; | |
1093 | dseek(&text, loc, (long)sizeof(archdr)); | |
1094 | getarhdr(); | |
1095 | mkfsym(archdr.ar_name); | |
1096 | load2(loc + (long)sizeof(archdr)); | |
1097 | } | |
1098 | } | |
1099 | close(infil); | |
1100 | } | |
1101 | ||
1102 | load2(loc) | |
1103 | long loc; | |
1104 | { | |
1105 | int size; | |
1106 | register struct nlist *sp; | |
1107 | register struct local *lp; | |
1108 | register int symno, i; | |
1109 | int type; | |
1110 | ||
1111 | readhdr(loc); | |
537f7e17 | 1112 | if (!funding) { |
c4e4978a BJ |
1113 | ctrel = torigin; |
1114 | cdrel += dorigin; | |
1115 | cbrel += borigin; | |
1116 | } | |
1117 | /* | |
1118 | * Reread the symbol table, recording the numbering | |
1119 | * of symbols for fixing external references. | |
1120 | */ | |
1121 | for (i = 0; i < LHSIZ; i++) | |
1122 | lochash[i] = 0; | |
1123 | clocseg = locseg; | |
1124 | clocseg->lo_used = 0; | |
1125 | symno = -1; | |
1126 | loc += N_TXTOFF(filhdr); | |
1127 | dseek(&text, loc+filhdr.a_text+filhdr.a_data+ | |
1128 | filhdr.a_trsize+filhdr.a_drsize+filhdr.a_syms, sizeof(off_t)); | |
1129 | mget(&size, sizeof(size), &text); | |
1130 | dseek(&text, loc+filhdr.a_text+filhdr.a_data+ | |
1131 | filhdr.a_trsize+filhdr.a_drsize+filhdr.a_syms+sizeof(off_t), | |
1132 | size - sizeof(off_t)); | |
1133 | curstr = (char *)malloc(size); | |
1134 | if (curstr == NULL) | |
1135 | error(1, "out of space reading string table (pass 2)"); | |
1136 | mget(curstr+sizeof(off_t), size-sizeof(off_t), &text); | |
1137 | dseek(&text, loc+filhdr.a_text+filhdr.a_data+ | |
1138 | filhdr.a_trsize+filhdr.a_drsize, filhdr.a_syms); | |
1139 | while (text.size > 0) { | |
1140 | symno++; | |
1141 | mget((char *)&cursym, sizeof(struct nlist), &text); | |
1142 | if (cursym.n_un.n_strx) { | |
1143 | if (cursym.n_un.n_strx<sizeof(size) || | |
1144 | cursym.n_un.n_strx>=size) | |
1145 | error(1, "bad string table index (pass 2)"); | |
1146 | cursym.n_un.n_name = curstr + cursym.n_un.n_strx; | |
1147 | } | |
1148 | /* inline expansion of symreloc() */ | |
1149 | switch (cursym.n_type & 017) { | |
1150 | ||
1151 | case N_TEXT: | |
1152 | case N_EXT+N_TEXT: | |
1153 | cursym.n_value += ctrel; | |
1154 | break; | |
1155 | case N_DATA: | |
1156 | case N_EXT+N_DATA: | |
1157 | cursym.n_value += cdrel; | |
1158 | break; | |
1159 | case N_BSS: | |
1160 | case N_EXT+N_BSS: | |
1161 | cursym.n_value += cbrel; | |
1162 | break; | |
1163 | case N_EXT+N_UNDF: | |
1164 | break; | |
1165 | default: | |
1166 | if (cursym.n_type&N_EXT) | |
1167 | cursym.n_type = N_EXT+N_ABS; | |
1168 | } | |
1169 | /* end inline expansion of symreloc() */ | |
1170 | type = cursym.n_type; | |
a8cefc6a BJ |
1171 | if (yflag && cursym.n_un.n_name) |
1172 | for (i = 0; i < yflag; i++) | |
1173 | /* fast check for 2d character! */ | |
1174 | if (ytab[i][1] == cursym.n_un.n_name[1] && | |
1175 | !strcmp(ytab[i], cursym.n_un.n_name)) { | |
1176 | tracesym(); | |
1177 | break; | |
1178 | } | |
c4e4978a BJ |
1179 | if ((type&N_EXT) == 0) { |
1180 | if (!sflag&&!xflag&& | |
1181 | (!Xflag||cursym.n_un.n_name[0]!='L'||type&N_STAB)) | |
1182 | symwrite(&cursym, sout); | |
1183 | continue; | |
1184 | } | |
1185 | if (funding) | |
1186 | continue; | |
1187 | if ((sp = *lookup()) == 0) | |
1188 | error(1, "internal error: symbol not found"); | |
1189 | if (cursym.n_type == N_EXT+N_UNDF) { | |
1190 | if (clocseg->lo_used == NSYMPR) { | |
1191 | if (++clocseg == &locseg[NSEG]) | |
1192 | error(1, "local symbol overflow"); | |
1193 | clocseg->lo_used = 0; | |
1194 | } | |
1195 | if (clocseg->lo_first == 0) { | |
1196 | clocseg->lo_first = (struct local *) | |
1197 | malloc(NSYMPR * sizeof (struct local)); | |
1198 | if (clocseg->lo_first == 0) | |
1199 | error(1, "out of memory (clocseg)"); | |
1200 | } | |
1201 | lp = &clocseg->lo_first[clocseg->lo_used++]; | |
1202 | lp->l_index = symno; | |
1203 | lp->l_symbol = sp; | |
1204 | lp->l_link = lochash[symno % LHSIZ]; | |
1205 | lochash[symno % LHSIZ] = lp; | |
1206 | continue; | |
1207 | } | |
1208 | if (cursym.n_type & N_STAB) | |
1209 | continue; | |
1210 | if (cursym.n_type!=sp->n_type || cursym.n_value!=sp->n_value) { | |
1211 | printf("%s: ", cursym.n_un.n_name); | |
1212 | error(0, "multiply defined"); | |
1213 | } | |
1214 | } | |
1215 | if (funding) | |
1216 | return; | |
1217 | dseek(&text, loc, filhdr.a_text); | |
1218 | dseek(&reloc, loc+filhdr.a_text+filhdr.a_data, filhdr.a_trsize); | |
537f7e17 | 1219 | load2td(ctrel, torigin - textbase, tout, trout); |
c4e4978a BJ |
1220 | dseek(&text, loc+filhdr.a_text, filhdr.a_data); |
1221 | dseek(&reloc, loc+filhdr.a_text+filhdr.a_data+filhdr.a_trsize, | |
1222 | filhdr.a_drsize); | |
537f7e17 | 1223 | load2td(cdrel, dorigin - database, dout, drout); |
c4e4978a BJ |
1224 | while (filhdr.a_data & (sizeof(long)-1)) { |
1225 | bputc(0, dout); | |
1226 | filhdr.a_data++; | |
1227 | } | |
1228 | torigin += filhdr.a_text; | |
168b3434 BJ |
1229 | dorigin += round(filhdr.a_data, sizeof (long)); |
1230 | borigin += round(filhdr.a_bss, sizeof (long)); | |
c4e4978a BJ |
1231 | free(curstr); |
1232 | } | |
1233 | ||
a8cefc6a BJ |
1234 | struct tynames { |
1235 | int ty_value; | |
1236 | char *ty_name; | |
1237 | } tynames[] = { | |
1238 | N_UNDF, "undefined", | |
1239 | N_ABS, "absolute", | |
1240 | N_TEXT, "text", | |
1241 | N_DATA, "data", | |
1242 | N_BSS, "bss", | |
1243 | N_COMM, "common", | |
1244 | 0, 0, | |
1245 | }; | |
1246 | ||
1247 | tracesym() | |
1248 | { | |
1249 | register struct tynames *tp; | |
1250 | ||
1251 | if (cursym.n_type & N_STAB) | |
1252 | return; | |
1253 | printf("%s", filname); | |
1254 | if (archdr.ar_name[0]) | |
1255 | printf("(%s)", archdr.ar_name); | |
1256 | printf(": "); | |
1257 | if ((cursym.n_type&N_TYPE) == N_UNDF && cursym.n_value) { | |
1258 | printf("definition of common %s size %d\n", | |
1259 | cursym.n_un.n_name, cursym.n_value); | |
1260 | return; | |
1261 | } | |
1262 | for (tp = tynames; tp->ty_name; tp++) | |
1263 | if (tp->ty_value == (cursym.n_type&N_TYPE)) | |
1264 | break; | |
1265 | printf((cursym.n_type&N_TYPE) ? "definition of" : "reference to"); | |
1266 | if (cursym.n_type&N_EXT) | |
1267 | printf(" external"); | |
1268 | if (tp->ty_name) | |
1269 | printf(" %s", tp->ty_name); | |
1270 | printf(" %s\n", cursym.n_un.n_name); | |
1271 | } | |
1272 | ||
537f7e17 BJ |
1273 | /* |
1274 | * This routine relocates the single text or data segment argument. | |
1275 | * Offsets from external symbols are resolved by adding the value | |
1276 | * of the external symbols. Non-external reference are updated to account | |
1277 | * for the relative motion of the segments (ctrel, cdrel, ...). If | |
1278 | * a relocation was pc-relative, then we update it to reflect the | |
1279 | * change in the positioning of the segments by adding the displacement | |
1280 | * of the referenced segment and subtracting the displacement of the | |
1281 | * current segment (creloc). | |
1282 | * | |
1283 | * If we are saving the relocation information, then we increase | |
1284 | * each relocation datum address by our base position in the new segment. | |
1285 | */ | |
1286 | load2td(creloc, position, b1, b2) | |
1287 | long creloc, offset; | |
c4e4978a BJ |
1288 | struct biobuf *b1, *b2; |
1289 | { | |
1290 | register struct nlist *sp; | |
1291 | register struct local *lp; | |
1292 | long tw; | |
1293 | register struct relocation_info *rp, *rpend; | |
c4e4978a BJ |
1294 | struct relocation_info *relp; |
1295 | char *codep; | |
1296 | register char *cp; | |
1297 | int relsz, codesz; | |
1298 | ||
1299 | relsz = reloc.size; | |
1300 | relp = (struct relocation_info *)malloc(relsz); | |
1301 | codesz = text.size; | |
1302 | codep = (char *)malloc(codesz); | |
1303 | if (relp == 0 || codep == 0) | |
1304 | error(1, "out of memory (load2td)"); | |
1305 | mget((char *)relp, relsz, &reloc); | |
1306 | rpend = &relp[relsz / sizeof (struct relocation_info)]; | |
1307 | mget(codep, codesz, &text); | |
1308 | for (rp = relp; rp < rpend; rp++) { | |
c4e4978a | 1309 | cp = codep + rp->r_address; |
537f7e17 BJ |
1310 | /* |
1311 | * Pick up previous value at location to be relocated. | |
1312 | */ | |
c4e4978a BJ |
1313 | switch (rp->r_length) { |
1314 | ||
1315 | case 0: /* byte */ | |
1316 | tw = *cp; | |
1317 | break; | |
1318 | ||
1319 | case 1: /* word */ | |
1320 | tw = *(short *)cp; | |
1321 | break; | |
1322 | ||
1323 | case 2: /* long */ | |
1324 | tw = *(long *)cp; | |
1325 | break; | |
1326 | ||
1327 | default: | |
1328 | error(1, "load2td botch: bad length"); | |
1329 | } | |
537f7e17 BJ |
1330 | /* |
1331 | * If relative to an external which is defined, | |
1332 | * resolve to a simpler kind of reference in the | |
1333 | * result file. If the external is undefined, just | |
1334 | * convert the symbol number to the number of the | |
1335 | * symbol in the result file and leave it undefined. | |
1336 | */ | |
c4e4978a | 1337 | if (rp->r_extern) { |
537f7e17 BJ |
1338 | /* |
1339 | * Search the hash table which maps local | |
1340 | * symbol numbers to symbol tables entries | |
1341 | * in the new a.out file. | |
1342 | */ | |
c4e4978a BJ |
1343 | lp = lochash[rp->r_symbolnum % LHSIZ]; |
1344 | while (lp->l_index != rp->r_symbolnum) { | |
1345 | lp = lp->l_link; | |
1346 | if (lp == 0) | |
1347 | error(1, "local symbol botch"); | |
1348 | } | |
1349 | sp = lp->l_symbol; | |
1350 | if (sp->n_type == N_EXT+N_UNDF) | |
1351 | rp->r_symbolnum = nsym+symx(sp); | |
1352 | else { | |
1353 | rp->r_symbolnum = sp->n_type & N_TYPE; | |
1354 | tw += sp->n_value; | |
1355 | rp->r_extern = 0; | |
1356 | } | |
1357 | } else switch (rp->r_symbolnum & N_TYPE) { | |
537f7e17 BJ |
1358 | /* |
1359 | * Relocation is relative to the loaded position | |
1360 | * of another segment. Update by the change in position | |
1361 | * of that segment. | |
1362 | */ | |
c4e4978a BJ |
1363 | case N_TEXT: |
1364 | tw += ctrel; | |
1365 | break; | |
1366 | case N_DATA: | |
1367 | tw += cdrel; | |
1368 | break; | |
1369 | case N_BSS: | |
1370 | tw += cbrel; | |
1371 | break; | |
1372 | case N_ABS: | |
1373 | break; | |
1374 | default: | |
1375 | error(1, "relocation format botch (symbol type))"); | |
1376 | } | |
537f7e17 BJ |
1377 | /* |
1378 | * Relocation is pc relative, so decrease the relocation | |
1379 | * by the amount the current segment is displaced. | |
1380 | * (E.g if we are a relative reference to a text location | |
1381 | * from data space, we added the increase in the text address | |
1382 | * above, and subtract the increase in our (data) address | |
1383 | * here, leaving the net change the relative change in the | |
1384 | * positioning of our text and data segments.) | |
1385 | */ | |
c4e4978a | 1386 | if (rp->r_pcrel) |
c4e4978a | 1387 | tw -= creloc; |
537f7e17 BJ |
1388 | /* |
1389 | * Put the value back in the segment, | |
1390 | * while checking for overflow. | |
1391 | */ | |
c4e4978a BJ |
1392 | switch (rp->r_length) { |
1393 | ||
1394 | case 0: /* byte */ | |
1395 | if (tw < -128 || tw > 127) | |
1396 | error(0, "byte displacement overflow"); | |
1397 | *cp = tw; | |
1398 | break; | |
1399 | case 1: /* word */ | |
1400 | if (tw < -32768 || tw > 32767) | |
1401 | error(0, "word displacement overflow"); | |
1402 | *(short *)cp = tw; | |
1403 | break; | |
1404 | case 2: /* long */ | |
1405 | *(long *)cp = tw; | |
1406 | break; | |
1407 | } | |
537f7e17 BJ |
1408 | /* |
1409 | * If we are saving relocation information, | |
1410 | * we must convert the address in the segment from | |
1411 | * the old .o file into an address in the segment in | |
1412 | * the new a.out, by adding the position of our | |
1413 | * segment in the new larger segment. | |
1414 | */ | |
c4e4978a | 1415 | if (rflag) |
537f7e17 | 1416 | rp->r_address += position; |
c4e4978a BJ |
1417 | } |
1418 | bwrite(codep, codesz, b1); | |
1419 | if (rflag) | |
1420 | bwrite(relp, relsz, b2); | |
1421 | cfree((char *)relp); | |
1422 | cfree(codep); | |
1423 | } | |
1424 | ||
1425 | finishout() | |
1426 | { | |
1427 | register int i; | |
1428 | int nsymt; | |
1429 | ||
1430 | if (sflag==0) { | |
1431 | nsymt = symx(nextsym); | |
1432 | for (i = 0; i < nsymt; i++) | |
1433 | symwrite(xsym(i), sout); | |
1434 | bwrite(&offset, sizeof offset, sout); | |
1435 | } | |
1436 | if (!ofilfnd) { | |
1437 | unlink("a.out"); | |
a8cefc6a BJ |
1438 | if (link("l.out", "a.out") < 0) |
1439 | error(1, "cannot move l.out to a.out"); | |
c4e4978a BJ |
1440 | ofilename = "a.out"; |
1441 | } | |
1442 | delarg = errlev; | |
1443 | delexit(); | |
1444 | } | |
1445 | ||
1446 | mkfsym(s) | |
1447 | char *s; | |
1448 | { | |
1449 | ||
1450 | if (sflag || xflag) | |
1451 | return; | |
1452 | cursym.n_un.n_name = s; | |
1453 | cursym.n_type = N_TEXT; | |
1454 | cursym.n_value = torigin; | |
1455 | symwrite(&cursym, sout); | |
1456 | } | |
1457 | ||
1458 | getarhdr() | |
1459 | { | |
1460 | register char *cp; | |
1461 | ||
1462 | mget((char *)&archdr, sizeof archdr, &text); | |
1463 | for (cp=archdr.ar_name; cp<&archdr.ar_name[sizeof(archdr.ar_name)];) | |
1464 | if (*cp++ == ' ') { | |
1465 | cp[-1] = 0; | |
1466 | return; | |
1467 | } | |
1468 | } | |
1469 | ||
1470 | mget(loc, n, sp) | |
1471 | register STREAM *sp; | |
1472 | register char *loc; | |
1473 | { | |
1474 | register char *p; | |
1475 | register int take; | |
1476 | ||
1477 | top: | |
1478 | if (n == 0) | |
1479 | return; | |
1480 | if (sp->size && sp->nibuf) { | |
1481 | p = sp->ptr; | |
1482 | take = sp->size; | |
1483 | if (take > sp->nibuf) | |
1484 | take = sp->nibuf; | |
1485 | if (take > n) | |
1486 | take = n; | |
1487 | n -= take; | |
1488 | sp->size -= take; | |
1489 | sp->nibuf -= take; | |
1490 | sp->pos += take; | |
1491 | do | |
1492 | *loc++ = *p++; | |
1493 | while (--take > 0); | |
1494 | sp->ptr = p; | |
1495 | goto top; | |
1496 | } | |
175b0d05 RC |
1497 | if (n > p_blksize) { |
1498 | take = n - n % p_blksize; | |
1499 | lseek(infil, (sp->bno+1)<<p_blkshift, 0); | |
c4e4978a BJ |
1500 | if (take > sp->size || read(infil, loc, take) != take) |
1501 | error(1, "premature EOF"); | |
1502 | loc += take; | |
1503 | n -= take; | |
1504 | sp->size -= take; | |
1505 | sp->pos += take; | |
175b0d05 | 1506 | dseek(sp, (sp->bno+1+(take>>p_blkshift))<<p_blkshift, -1); |
c4e4978a BJ |
1507 | goto top; |
1508 | } | |
1509 | *loc++ = get(sp); | |
1510 | --n; | |
1511 | goto top; | |
1512 | } | |
1513 | ||
1514 | symwrite(sp, bp) | |
1515 | struct nlist *sp; | |
1516 | struct biobuf *bp; | |
1517 | { | |
1518 | register int len; | |
1519 | register char *str; | |
1520 | ||
1521 | str = sp->n_un.n_name; | |
1522 | if (str) { | |
1523 | sp->n_un.n_strx = offset; | |
1524 | len = strlen(str) + 1; | |
1525 | bwrite(str, len, strout); | |
1526 | offset += len; | |
1527 | } | |
1528 | bwrite(sp, sizeof (*sp), bp); | |
1529 | sp->n_un.n_name = str; | |
1530 | } | |
1531 | ||
1532 | dseek(sp, loc, s) | |
1533 | register STREAM *sp; | |
1534 | long loc, s; | |
1535 | { | |
1536 | register PAGE *p; | |
1537 | register b, o; | |
1538 | int n; | |
1539 | ||
175b0d05 RC |
1540 | b = loc>>p_blkshift; |
1541 | o = loc&p_blkmask; | |
c4e4978a BJ |
1542 | if (o&01) |
1543 | error(1, "loader error; odd offset"); | |
1544 | --sp->pno->nuser; | |
1545 | if ((p = &page[0])->bno!=b && (p = &page[1])->bno!=b) | |
1546 | if (p->nuser==0 || (p = &page[0])->nuser==0) { | |
1547 | if (page[0].nuser==0 && page[1].nuser==0) | |
1548 | if (page[0].bno < page[1].bno) | |
1549 | p = &page[0]; | |
1550 | p->bno = b; | |
175b0d05 RC |
1551 | lseek(infil, loc & ~(long)p_blkmask, 0); |
1552 | if ((n = read(infil, p->buff, p_blksize)) < 0) | |
c4e4978a BJ |
1553 | n = 0; |
1554 | p->nibuf = n; | |
175b0d05 RC |
1555 | } else |
1556 | error(1, "botch: no pages"); | |
c4e4978a BJ |
1557 | ++p->nuser; |
1558 | sp->bno = b; | |
1559 | sp->pno = p; | |
1560 | if (s != -1) {sp->size = s; sp->pos = 0;} | |
1561 | sp->ptr = (char *)(p->buff + o); | |
1562 | if ((sp->nibuf = p->nibuf-o) <= 0) | |
1563 | sp->size = 0; | |
1564 | } | |
1565 | ||
1566 | char | |
1567 | get(asp) | |
1568 | STREAM *asp; | |
1569 | { | |
1570 | register STREAM *sp; | |
1571 | ||
1572 | sp = asp; | |
1573 | if ((sp->nibuf -= sizeof(char)) < 0) { | |
175b0d05 | 1574 | dseek(sp, ((long)(sp->bno+1)<<p_blkshift), (long)-1); |
c4e4978a BJ |
1575 | sp->nibuf -= sizeof(char); |
1576 | } | |
1577 | if ((sp->size -= sizeof(char)) <= 0) { | |
1578 | if (sp->size < 0) | |
1579 | error(1, "premature EOF"); | |
1580 | ++fpage.nuser; | |
1581 | --sp->pno->nuser; | |
1582 | sp->pno = (PAGE *) &fpage; | |
1583 | } | |
1584 | sp->pos += sizeof(char); | |
1585 | return(*sp->ptr++); | |
1586 | } | |
1587 | ||
1588 | getfile(acp) | |
1589 | char *acp; | |
1590 | { | |
1591 | register char *cp; | |
1592 | register int c; | |
1593 | char arcmag[SARMAG+1]; | |
1594 | struct stat stb; | |
1595 | ||
c4e4978a BJ |
1596 | infil = -1; |
1597 | archdr.ar_name[0] = '\0'; | |
175b0d05 | 1598 | filname = cp = acp; |
c4e4978a | 1599 | if (cp[0]=='-' && cp[1]=='l') { |
a8cefc6a | 1600 | char *locfilname = "/usr/local/lib/libxxxxxxxxxxxxxxx"; |
c4e4978a BJ |
1601 | if(cp[2] == '\0') |
1602 | cp = "-la"; | |
a8cefc6a | 1603 | filname = "/usr/lib/libxxxxxxxxxxxxxxx"; |
c4e4978a BJ |
1604 | for(c=0; cp[c+2]; c++) { |
1605 | filname[c+12] = cp[c+2]; | |
1606 | locfilname[c+18] = cp[c+2]; | |
1607 | } | |
1608 | filname[c+12] = locfilname[c+18] = '.'; | |
1609 | filname[c+13] = locfilname[c+19] = 'a'; | |
1610 | filname[c+14] = locfilname[c+20] = '\0'; | |
1611 | if ((infil = open(filname+4, 0)) >= 0) { | |
1612 | filname += 4; | |
1613 | } else if ((infil = open(filname, 0)) < 0) { | |
1614 | filname = locfilname; | |
1615 | } | |
1616 | } | |
1617 | if (infil == -1 && (infil = open(filname, 0)) < 0) | |
1618 | error(1, "cannot open"); | |
175b0d05 | 1619 | fstat(infil, &stb); |
c4e4978a BJ |
1620 | page[0].bno = page[1].bno = -1; |
1621 | page[0].nuser = page[1].nuser = 0; | |
175b0d05 RC |
1622 | c = stb.st_blksize; |
1623 | if (c == 0 || (c & (c - 1)) != 0) { | |
1624 | /* use default size if not a power of two */ | |
1625 | c = BLKSIZE; | |
1626 | } | |
1627 | if (p_blksize != c) { | |
1628 | p_blksize = c; | |
1629 | p_blkmask = c - 1; | |
1630 | for (p_blkshift = 0; c > 1 ; p_blkshift++) | |
1631 | c >>= 1; | |
1632 | if (page[0].buff != NULL) | |
1633 | free(page[0].buff); | |
1634 | page[0].buff = (char *)malloc(p_blksize); | |
1635 | if (page[0].buff == NULL) | |
1636 | error(1, "ran out of memory (getfile)"); | |
1637 | if (page[1].buff != NULL) | |
1638 | free(page[1].buff); | |
1639 | page[1].buff = (char *)malloc(p_blksize); | |
1640 | if (page[1].buff == NULL) | |
1641 | error(1, "ran out of memory (getfile)"); | |
1642 | } | |
c4e4978a BJ |
1643 | text.pno = reloc.pno = (PAGE *) &fpage; |
1644 | fpage.nuser = 2; | |
1645 | dseek(&text, 0L, SARMAG); | |
1646 | if (text.size <= 0) | |
1647 | error(1, "premature EOF"); | |
1648 | mget((char *)arcmag, SARMAG, &text); | |
1649 | arcmag[SARMAG] = 0; | |
1650 | if (strcmp(arcmag, ARMAG)) | |
1651 | return (0); | |
1652 | dseek(&text, SARMAG, sizeof archdr); | |
1653 | if(text.size <= 0) | |
1654 | return (1); | |
1655 | getarhdr(); | |
1656 | if (strncmp(archdr.ar_name, "__.SYMDEF", sizeof(archdr.ar_name)) != 0) | |
1657 | return (1); | |
c4e4978a BJ |
1658 | return (stb.st_mtime > atol(archdr.ar_date) ? 3 : 2); |
1659 | } | |
1660 | ||
1661 | struct nlist ** | |
1662 | lookup() | |
1663 | { | |
1664 | register int sh; | |
1665 | register struct nlist **hp; | |
1666 | register char *cp, *cp1; | |
1667 | register struct symseg *gp; | |
1668 | register int i; | |
1669 | ||
1670 | sh = 0; | |
1671 | for (cp = cursym.n_un.n_name; *cp;) | |
1672 | sh = (sh<<1) + *cp++; | |
1673 | sh = (sh & 0x7fffffff) % HSIZE; | |
1674 | for (gp = symseg; gp < &symseg[NSEG]; gp++) { | |
1675 | if (gp->sy_first == 0) { | |
1676 | gp->sy_first = (struct nlist *) | |
1677 | calloc(NSYM, sizeof (struct nlist)); | |
1678 | gp->sy_hfirst = (struct nlist **) | |
1679 | calloc(HSIZE, sizeof (struct nlist *)); | |
1680 | if (gp->sy_first == 0 || gp->sy_hfirst == 0) | |
1681 | error(1, "ran out of space for symbol table"); | |
1682 | gp->sy_last = gp->sy_first + NSYM; | |
1683 | gp->sy_hlast = gp->sy_hfirst + HSIZE; | |
1684 | } | |
1685 | if (gp > csymseg) | |
1686 | csymseg = gp; | |
1687 | hp = gp->sy_hfirst + sh; | |
1688 | i = 1; | |
1689 | do { | |
1690 | if (*hp == 0) { | |
1691 | if (gp->sy_used == NSYM) | |
1692 | break; | |
1693 | return (hp); | |
1694 | } | |
1695 | cp1 = (*hp)->n_un.n_name; | |
1696 | for (cp = cursym.n_un.n_name; *cp == *cp1++;) | |
1697 | if (*cp++ == 0) | |
1698 | return (hp); | |
1699 | hp += i; | |
1700 | i += 2; | |
1701 | if (hp >= gp->sy_hlast) | |
1702 | hp -= HSIZE; | |
1703 | } while (i < HSIZE); | |
1704 | if (i > HSIZE) | |
1705 | error(1, "hash table botch"); | |
1706 | } | |
1707 | error(1, "symbol table overflow"); | |
1708 | /*NOTREACHED*/ | |
1709 | } | |
1710 | ||
1711 | symfree(saved) | |
1712 | struct nlist *saved; | |
1713 | { | |
1714 | register struct symseg *gp; | |
1715 | register struct nlist *sp; | |
1716 | ||
1717 | for (gp = csymseg; gp >= symseg; gp--, csymseg--) { | |
1718 | sp = gp->sy_first + gp->sy_used; | |
1719 | if (sp == saved) { | |
1720 | nextsym = sp; | |
1721 | return; | |
1722 | } | |
1723 | for (sp--; sp >= gp->sy_first; sp--) { | |
1724 | gp->sy_hfirst[sp->n_hash] = 0; | |
1725 | gp->sy_used--; | |
1726 | if (sp == saved) { | |
1727 | nextsym = sp; | |
1728 | return; | |
1729 | } | |
1730 | } | |
1731 | } | |
1732 | if (saved == 0) | |
1733 | return; | |
1734 | error(1, "symfree botch"); | |
1735 | } | |
1736 | ||
1737 | struct nlist ** | |
1738 | slookup(s) | |
1739 | char *s; | |
1740 | { | |
1741 | ||
1742 | cursym.n_un.n_name = s; | |
1743 | cursym.n_type = N_EXT+N_UNDF; | |
1744 | cursym.n_value = 0; | |
1745 | return (lookup()); | |
1746 | } | |
1747 | ||
1748 | enter(hp) | |
1749 | register struct nlist **hp; | |
1750 | { | |
1751 | register struct nlist *sp; | |
1752 | ||
1753 | if (*hp==0) { | |
1754 | if (hp < csymseg->sy_hfirst || hp >= csymseg->sy_hlast) | |
1755 | error(1, "enter botch"); | |
1756 | *hp = lastsym = sp = csymseg->sy_first + csymseg->sy_used; | |
1757 | csymseg->sy_used++; | |
1758 | sp->n_un.n_name = cursym.n_un.n_name; | |
1759 | sp->n_type = cursym.n_type; | |
1760 | sp->n_hash = hp - csymseg->sy_hfirst; | |
1761 | sp->n_value = cursym.n_value; | |
1762 | nextsym = lastsym + 1; | |
1763 | return(1); | |
1764 | } else { | |
1765 | lastsym = *hp; | |
1766 | return(0); | |
1767 | } | |
1768 | } | |
1769 | ||
1770 | symx(sp) | |
1771 | struct nlist *sp; | |
1772 | { | |
1773 | register struct symseg *gp; | |
1774 | ||
1775 | if (sp == 0) | |
1776 | return (0); | |
1777 | for (gp = csymseg; gp >= symseg; gp--) | |
1778 | /* <= is sloppy so nextsym will always work */ | |
1779 | if (sp >= gp->sy_first && sp <= gp->sy_last) | |
1780 | return ((gp - symseg) * NSYM + sp - gp->sy_first); | |
1781 | error(1, "symx botch"); | |
1782 | /*NOTREACHED*/ | |
1783 | } | |
1784 | ||
1785 | symreloc() | |
1786 | { | |
1787 | if(funding) return; | |
1788 | switch (cursym.n_type & 017) { | |
1789 | ||
1790 | case N_TEXT: | |
1791 | case N_EXT+N_TEXT: | |
1792 | cursym.n_value += ctrel; | |
1793 | return; | |
1794 | ||
1795 | case N_DATA: | |
1796 | case N_EXT+N_DATA: | |
1797 | cursym.n_value += cdrel; | |
1798 | return; | |
1799 | ||
1800 | case N_BSS: | |
1801 | case N_EXT+N_BSS: | |
1802 | cursym.n_value += cbrel; | |
1803 | return; | |
1804 | ||
1805 | case N_EXT+N_UNDF: | |
1806 | return; | |
1807 | ||
1808 | default: | |
1809 | if (cursym.n_type&N_EXT) | |
1810 | cursym.n_type = N_EXT+N_ABS; | |
1811 | return; | |
1812 | } | |
1813 | } | |
1814 | ||
1815 | error(n, s) | |
1816 | char *s; | |
1817 | { | |
a8cefc6a | 1818 | |
c4e4978a BJ |
1819 | if (errlev==0) |
1820 | printf("ld:"); | |
1821 | if (filname) { | |
1822 | printf("%s", filname); | |
1823 | if (n != -1 && archdr.ar_name[0]) | |
1824 | printf("(%s)", archdr.ar_name); | |
1825 | printf(": "); | |
1826 | } | |
1827 | printf("%s\n", s); | |
1828 | if (n == -1) | |
1829 | return; | |
1830 | if (n) | |
1831 | delexit(); | |
1832 | errlev = 2; | |
1833 | } | |
1834 | ||
1835 | readhdr(loc) | |
1836 | off_t loc; | |
1837 | { | |
1838 | ||
1839 | dseek(&text, loc, (long)sizeof(filhdr)); | |
1840 | mget((short *)&filhdr, sizeof(filhdr), &text); | |
1841 | if (N_BADMAG(filhdr)) { | |
1842 | if (filhdr.a_magic == OARMAG) | |
1843 | error(1, "old archive"); | |
1844 | error(1, "bad magic number"); | |
1845 | } | |
1846 | if (filhdr.a_text&01 || filhdr.a_data&01) | |
1847 | error(1, "text/data size odd"); | |
1848 | if (filhdr.a_magic == NMAGIC || filhdr.a_magic == ZMAGIC) { | |
7ea0db89 | 1849 | cdrel = -round(filhdr.a_text, pagesize); |
c4e4978a BJ |
1850 | cbrel = cdrel - filhdr.a_data; |
1851 | } else if (filhdr.a_magic == OMAGIC) { | |
1852 | cdrel = -filhdr.a_text; | |
1853 | cbrel = cdrel - filhdr.a_data; | |
1854 | } else | |
1855 | error(1, "bad format"); | |
1856 | } | |
1857 | ||
1858 | round(v, r) | |
1859 | int v; | |
1860 | u_long r; | |
1861 | { | |
1862 | ||
1863 | r--; | |
1864 | v += r; | |
1865 | v &= ~(long)r; | |
1866 | return(v); | |
1867 | } | |
1868 | ||
1869 | #define NSAVETAB 8192 | |
1870 | char *savetab; | |
1871 | int saveleft; | |
1872 | ||
1873 | char * | |
1874 | savestr(cp) | |
1875 | register char *cp; | |
1876 | { | |
1877 | register int len; | |
1878 | ||
1879 | len = strlen(cp) + 1; | |
1880 | if (len > saveleft) { | |
1881 | saveleft = NSAVETAB; | |
1882 | if (len > saveleft) | |
1883 | saveleft = len; | |
1884 | savetab = (char *)malloc(saveleft); | |
1885 | if (savetab == 0) | |
1886 | error(1, "ran out of memory (savestr)"); | |
1887 | } | |
1888 | strncpy(savetab, cp, len); | |
1889 | cp = savetab; | |
1890 | savetab += len; | |
1891 | saveleft -= len; | |
1892 | return (cp); | |
1893 | } | |
1894 | ||
175b0d05 RC |
1895 | bopen(bp, off, bufsize) |
1896 | register struct biobuf *bp; | |
c4e4978a BJ |
1897 | { |
1898 | ||
175b0d05 RC |
1899 | bp->b_ptr = bp->b_buf = (char *)malloc(bufsize); |
1900 | if (bp->b_ptr == (char *)0) | |
1901 | error(1, "ran out of memory (bopen)"); | |
1902 | bp->b_bufsize = bufsize; | |
1903 | bp->b_nleft = bufsize - (off % bufsize); | |
c4e4978a BJ |
1904 | bp->b_off = off; |
1905 | bp->b_link = biobufs; | |
1906 | biobufs = bp; | |
1907 | } | |
1908 | ||
1909 | int bwrerror; | |
1910 | ||
1911 | bwrite(p, cnt, bp) | |
1912 | register char *p; | |
1913 | register int cnt; | |
1914 | register struct biobuf *bp; | |
1915 | { | |
1916 | register int put; | |
1917 | register char *to; | |
1918 | ||
1919 | top: | |
1920 | if (cnt == 0) | |
1921 | return; | |
1922 | if (bp->b_nleft) { | |
1923 | put = bp->b_nleft; | |
1924 | if (put > cnt) | |
1925 | put = cnt; | |
1926 | bp->b_nleft -= put; | |
1927 | to = bp->b_ptr; | |
1928 | asm("movc3 r8,(r11),(r7)"); | |
1929 | bp->b_ptr += put; | |
1930 | p += put; | |
1931 | cnt -= put; | |
1932 | goto top; | |
1933 | } | |
175b0d05 | 1934 | if (cnt >= bp->b_bufsize) { |
c4e4978a BJ |
1935 | if (bp->b_ptr != bp->b_buf) |
1936 | bflush1(bp); | |
175b0d05 | 1937 | put = cnt - cnt % bp->b_bufsize; |
c4e4978a BJ |
1938 | if (boffset != bp->b_off) |
1939 | lseek(biofd, bp->b_off, 0); | |
1940 | if (write(biofd, p, put) != put) { | |
1941 | bwrerror = 1; | |
1942 | error(1, "output write error"); | |
1943 | } | |
1944 | bp->b_off += put; | |
1945 | boffset = bp->b_off; | |
1946 | p += put; | |
1947 | cnt -= put; | |
1948 | goto top; | |
1949 | } | |
1950 | bflush1(bp); | |
1951 | goto top; | |
1952 | } | |
1953 | ||
1954 | bflush() | |
1955 | { | |
1956 | register struct biobuf *bp; | |
1957 | ||
1958 | if (bwrerror) | |
1959 | return; | |
1960 | for (bp = biobufs; bp; bp = bp->b_link) | |
1961 | bflush1(bp); | |
1962 | } | |
1963 | ||
1964 | bflush1(bp) | |
1965 | register struct biobuf *bp; | |
1966 | { | |
1967 | register int cnt = bp->b_ptr - bp->b_buf; | |
1968 | ||
1969 | if (cnt == 0) | |
1970 | return; | |
1971 | if (boffset != bp->b_off) | |
1972 | lseek(biofd, bp->b_off, 0); | |
1973 | if (write(biofd, bp->b_buf, cnt) != cnt) { | |
1974 | bwrerror = 1; | |
1975 | error(1, "output write error"); | |
1976 | } | |
1977 | bp->b_off += cnt; | |
1978 | boffset = bp->b_off; | |
1979 | bp->b_ptr = bp->b_buf; | |
175b0d05 | 1980 | bp->b_nleft = bp->b_bufsize; |
c4e4978a BJ |
1981 | } |
1982 | ||
1983 | bflushc(bp, c) | |
1984 | register struct biobuf *bp; | |
1985 | { | |
1986 | ||
1987 | bflush1(bp); | |
1988 | bputc(c, bp); | |
1989 | } | |
175b0d05 RC |
1990 | |
1991 | bseek(bp, off) | |
1992 | register struct biobuf *bp; | |
1993 | register off_t off; | |
1994 | { | |
1995 | bflush1(bp); | |
1996 | ||
1997 | bp->b_nleft = bp->b_bufsize - (off % bp->b_bufsize); | |
1998 | bp->b_off = off; | |
1999 | } |