arch/alpha/boot/tools/objstrip.c: Mark "usage" static
[linux-2.6.git] / arch / sparc / boot / btfixupprep.c
1 /*
2    Simple utility to prepare vmlinux image for sparc.
3    Resolves all BTFIXUP uses and settings and creates
4    a special .s object to link to the image.
5    
6    Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
7    
8    This program is free software; you can redistribute it and/or modify
9    it under the terms of the GNU General Public License as published by
10    the Free Software Foundation; either version 2 of the License, or
11    (at your option) any later version.
12    
13    This program is distributed in the hope that it will be useful,
14    but WITHOUT ANY WARRANTY; without even the implied warranty of
15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16    GNU General Public License for more details.
17
18    You should have received a copy of the GNU General Public License
19    along with this program; if not, write to the Free Software
20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
21    
22 #include <stdio.h>
23 #include <string.h>
24 #include <ctype.h>
25 #include <errno.h>
26 #include <unistd.h>
27 #include <stdlib.h>
28 #include <malloc.h>
29
30 #define MAXSYMS 1024
31
32 static char *symtab = "SYMBOL TABLE:";
33 static char *relrec = "RELOCATION RECORDS FOR [";
34 static int rellen;
35 static int symlen;
36 int mode;
37
38 struct _btfixup;
39
40 typedef struct _btfixuprel {
41         char *sect;
42         unsigned long offset;
43         struct _btfixup *f;
44         int frel;
45         struct _btfixuprel *next;
46 } btfixuprel;
47
48 typedef struct _btfixup {
49         int type;
50         int setinitval;
51         unsigned int initval;
52         char *initvalstr;
53         char *name;
54         btfixuprel *rel;
55 } btfixup;
56
57 btfixup array[MAXSYMS];
58 int last = 0;
59 char buffer[1024];
60 unsigned long lastfoffset = -1;
61 unsigned long lastfrelno;
62 btfixup *lastf;
63
64 void fatal(void) __attribute__((noreturn));
65 void fatal(void)
66 {
67         fprintf(stderr, "Malformed output from objdump\n%s\n", buffer);
68         exit(1);
69 }
70
71 btfixup *find(int type, char *name)
72 {
73         int i;
74         for (i = 0; i < last; i++) {
75                 if (array[i].type == type && !strcmp(array[i].name, name))
76                         return array + i;
77         }
78         array[last].type = type;
79         array[last].name = strdup(name);
80         array[last].setinitval = 0;
81         if (!array[last].name) fatal();
82         array[last].rel = NULL;
83         last++;
84         if (last >= MAXSYMS) {
85                 fprintf(stderr, "Ugh. Something strange. More than %d different BTFIXUP symbols\n", MAXSYMS);
86                 exit(1);
87         }
88         return array + last - 1;
89 }
90
91 void set_mode (char *buffer)
92 {
93         for (mode = 0;; mode++)
94                 if (buffer[mode] < '0' || buffer[mode] > '9')
95                         break;
96         if (mode != 8 && mode != 16)
97                 fatal();
98 }
99
100
101 int main(int argc,char **argv)
102 {
103         char *p, *q;
104         char *sect;
105         int i, j, k;
106         unsigned int initval;
107         int shift;
108         btfixup *f;
109         btfixuprel *r, **rr;
110         unsigned long offset;
111         char *initvalstr;
112
113         symlen = strlen(symtab);
114         while (fgets (buffer, 1024, stdin) != NULL)
115                 if (!strncmp (buffer, symtab, symlen))
116                         goto main0;
117         fatal();
118 main0:
119         rellen = strlen(relrec);
120         while (fgets (buffer, 1024, stdin) != NULL)
121                 if (!strncmp (buffer, relrec, rellen))
122                         goto main1;
123         fatal();
124 main1:
125         sect = malloc(strlen (buffer + rellen) + 1);
126         if (!sect) fatal();
127         strcpy (sect, buffer + rellen);
128         p = strchr (sect, ']');
129         if (!p) fatal();
130         *p = 0;
131         if (fgets (buffer, 1024, stdin) == NULL)
132                 fatal();
133         while (fgets (buffer, 1024, stdin) != NULL) {
134                 int nbase;
135                 if (!strncmp (buffer, relrec, rellen))
136                         goto main1;
137                 if (mode == 0)
138                         set_mode (buffer);
139                 p = strchr (buffer, '\n');
140                 if (p) *p = 0;
141                 if (strlen (buffer) < 22+mode)
142                         continue;
143                 if (strncmp (buffer + mode, " R_SPARC_", 9))
144                         continue;
145                 nbase = 27 - 8 + mode;
146                 if (buffer[nbase] != '_' || buffer[nbase+1] != '_' || buffer[nbase+2] != '_')
147                         continue;
148                 switch (buffer[nbase+3]) {
149                         case 'f':       /* CALL */
150                         case 'b':       /* BLACKBOX */
151                         case 's':       /* SIMM13 */
152                         case 'a':       /* HALF */
153                         case 'h':       /* SETHI */
154                         case 'i':       /* INT */
155                                 break;
156                         default:
157                                 continue;
158                 }
159                 p = strchr (buffer + nbase+5, '+');
160                 if (p) *p = 0;
161                 shift = nbase + 5;
162                 if (buffer[nbase+4] == 's' && buffer[nbase+5] == '_') {
163                         shift = nbase + 6;
164                         if (strcmp (sect, ".init.text")) {
165                                 fprintf(stderr,
166                                     "Wrong use of '%s' BTFIXUPSET in '%s' section.\n"
167                                     "BTFIXUPSET_CALL can be used only in"
168                                     " __init sections\n",
169                                     buffer + shift, sect);
170                                 exit(1);
171                         }
172                 } else if (buffer[nbase+4] != '_')
173                         continue;
174                 if (!strcmp (sect, ".text.exit"))
175                         continue;
176                 if (strcmp (sect, ".text") &&
177                     strcmp (sect, ".init.text") &&
178                     strcmp (sect, ".fixup") &&
179                     (strcmp (sect, "__ksymtab") || buffer[nbase+3] != 'f')) {
180                         if (buffer[nbase+3] == 'f')
181                                 fprintf(stderr,
182                                     "Wrong use of '%s' in '%s' section.\n"
183                                     " It can be used only in .text, .init.text,"
184                                     " .fixup and __ksymtab\n",
185                                     buffer + shift, sect);
186                         else
187                                 fprintf(stderr,
188                                     "Wrong use of '%s' in '%s' section.\n"
189                                     " It can be only used in .text, .init.text,"
190                                     " and .fixup\n", buffer + shift, sect);
191                         exit(1);
192                 }
193                 p = strstr (buffer + shift, "__btset_");
194                 if (p && buffer[nbase+4] == 's') {
195                         fprintf(stderr, "__btset_ in BTFIXUP name can only be used when defining the variable, not for setting\n%s\n", buffer);
196                         exit(1);
197                 }
198                 initval = 0;
199                 initvalstr = NULL;
200                 if (p) {
201                         if (p[8] != '0' || p[9] != 'x') {
202                                 fprintf(stderr, "Pre-initialized values can be only initialized with hexadecimal constants starting 0x\n%s\n", buffer);
203                                 exit(1);
204                         }
205                         initval = strtoul(p + 10, &q, 16);
206                         if (*q || !initval) {
207                                 fprintf(stderr, "Pre-initialized values can be only in the form name__btset_0xXXXXXXXX where X are hex digits.\nThey cannot be name__btset_0x00000000 though. Use BTFIXUPDEF_XX instead of BTFIXUPDEF_XX_INIT then.\n%s\n", buffer);
208                                 exit(1);
209                         }
210                         initvalstr = p + 10;
211                         *p = 0;
212                 }
213                 f = find(buffer[nbase+3], buffer + shift);
214                 if (buffer[nbase+4] == 's')
215                         continue;
216                 switch (buffer[nbase+3]) {
217                 case 'f':
218                         if (initval) {
219                                 fprintf(stderr, "Cannot use pre-initalized fixups for calls\n%s\n", buffer);
220                                 exit(1);
221                         }
222                         if (!strcmp (sect, "__ksymtab")) {
223                                 if (strncmp (buffer + mode+9, "32        ", 10)) {
224                                         fprintf(stderr, "BTFIXUP_CALL in EXPORT_SYMBOL results in relocation other than R_SPARC_32\n\%s\n", buffer);
225                                         exit(1);
226                                 }
227                         } else if (strncmp (buffer + mode+9, "WDISP30   ", 10) &&
228                                    strncmp (buffer + mode+9, "HI22      ", 10) &&
229                                    strncmp (buffer + mode+9, "LO10      ", 10)) {
230                                 fprintf(stderr, "BTFIXUP_CALL results in relocation other than R_SPARC_WDISP30, R_SPARC_HI22 or R_SPARC_LO10\n%s\n", buffer);
231                                 exit(1);
232                         }
233                         break;
234                 case 'b':
235                         if (initval) {
236                                 fprintf(stderr, "Cannot use pre-initialized fixups for blackboxes\n%s\n", buffer);
237                                 exit(1);
238                         }
239                         if (strncmp (buffer + mode+9, "HI22      ", 10)) {
240                                 fprintf(stderr, "BTFIXUP_BLACKBOX results in relocation other than R_SPARC_HI22\n%s\n", buffer);
241                                 exit(1);
242                         }
243                         break;
244                 case 's':
245                         if (initval + 0x1000 >= 0x2000) {
246                                 fprintf(stderr, "Wrong initializer for SIMM13. Has to be from $fffff000 to $00000fff\n%s\n", buffer);
247                                 exit(1);
248                         }
249                         if (strncmp (buffer + mode+9, "13        ", 10)) {
250                                 fprintf(stderr, "BTFIXUP_SIMM13 results in relocation other than R_SPARC_13\n%s\n", buffer);
251                                 exit(1);
252                         }
253                         break;
254                 case 'a':
255                         if (initval + 0x1000 >= 0x2000 && (initval & 0x3ff)) {
256                                 fprintf(stderr, "Wrong initializer for HALF.\n%s\n", buffer);
257                                 exit(1);
258                         }
259                         if (strncmp (buffer + mode+9, "13        ", 10)) {
260                                 fprintf(stderr, "BTFIXUP_HALF results in relocation other than R_SPARC_13\n%s\n", buffer);
261                                 exit(1);
262                         }
263                         break;
264                 case 'h':
265                         if (initval & 0x3ff) {
266                                 fprintf(stderr, "Wrong initializer for SETHI. Cannot have set low 10 bits\n%s\n", buffer);
267                                 exit(1);
268                         }
269                         if (strncmp (buffer + mode+9, "HI22      ", 10)) {
270                                 fprintf(stderr, "BTFIXUP_SETHI results in relocation other than R_SPARC_HI22\n%s\n", buffer);
271                                 exit(1);
272                         }
273                         break;
274                 case 'i':
275                         if (initval) {
276                                 fprintf(stderr, "Cannot use pre-initalized fixups for INT\n%s\n", buffer);
277                                 exit(1);
278                         }
279                         if (strncmp (buffer + mode+9, "HI22      ", 10) && strncmp (buffer + mode+9, "LO10      ", 10)) {
280                                 fprintf(stderr, "BTFIXUP_INT results in relocation other than R_SPARC_HI22 and R_SPARC_LO10\n%s\n", buffer);
281                                 exit(1);
282                         }
283                         break;
284                 }
285                 if (!f->setinitval) {
286                         f->initval = initval;
287                         if (initvalstr) {
288                                 f->initvalstr = strdup(initvalstr);
289                                 if (!f->initvalstr) fatal();
290                         }
291                         f->setinitval = 1;
292                 } else if (f->initval != initval) {
293                         fprintf(stderr, "Btfixup %s previously used with initializer %s which doesn't match with current initializer\n%s\n",
294                                         f->name, f->initvalstr ? : "0x00000000", buffer);
295                         exit(1);
296                 } else if (initval && strcmp(f->initvalstr, initvalstr)) {
297                         fprintf(stderr, "Btfixup %s previously used with initializer %s which doesn't match with current initializer.\n"
298                                         "Initializers have to match literally as well.\n%s\n",
299                                         f->name, f->initvalstr, buffer);
300                         exit(1);
301                 }
302                 offset = strtoul(buffer, &q, 16);
303                 if (q != buffer + mode || (!offset && (mode == 8 ? strncmp (buffer, "00000000 ", 9) : strncmp (buffer, "0000000000000000 ", 17)))) {
304                         fprintf(stderr, "Malformed relocation address in\n%s\n", buffer);
305                         exit(1);
306                 }
307                 for (k = 0, r = f->rel, rr = &f->rel; r; rr = &r->next, r = r->next, k++)
308                         if (r->offset == offset && !strcmp(r->sect, sect)) {
309                                 fprintf(stderr, "Ugh. One address has two relocation records\n");
310                                 exit(1);
311                         }
312                 *rr = malloc(sizeof(btfixuprel));
313                 if (!*rr) fatal();
314                 (*rr)->offset = offset;
315                 (*rr)->f = NULL;
316                 if (buffer[nbase+3] == 'f') {
317                         lastf = f;
318                         lastfoffset = offset;
319                         lastfrelno = k;
320                 } else if (lastfoffset + 4 == offset) {
321                         (*rr)->f = lastf;
322                         (*rr)->frel = lastfrelno;
323                 }
324                 (*rr)->sect = sect;
325                 (*rr)->next = NULL;
326         }
327         printf("! Generated by btfixupprep. Do not edit.\n\n");
328         printf("\t.section\t\".data.init\",#alloc,#write\n\t.align\t4\n\n");
329         printf("\t.global\t___btfixup_start\n___btfixup_start:\n\n");
330         for (i = 0; i < last; i++) {
331                 f = array + i;
332                 printf("\t.global\t___%cs_%s\n", f->type, f->name);
333                 if (f->type == 'f')
334                         printf("___%cs_%s:\n\t.word 0x%08x,0,0,", f->type, f->name, f->type << 24);
335                 else
336                         printf("___%cs_%s:\n\t.word 0x%08x,0,", f->type, f->name, f->type << 24);
337                 for (j = 0, r = f->rel; r != NULL; j++, r = r->next);
338                 if (j)
339                         printf("%d\n\t.word\t", j * 2);
340                 else
341                         printf("0\n");
342                 for (r = f->rel, j--; r != NULL; j--, r = r->next) {
343                         if (!strcmp (r->sect, ".text"))
344                                 printf ("_stext+0x%08lx", r->offset);
345                         else if (!strcmp (r->sect, ".init.text"))
346                                 printf ("__init_begin+0x%08lx", r->offset);
347                         else if (!strcmp (r->sect, "__ksymtab"))
348                                 printf ("__start___ksymtab+0x%08lx", r->offset);
349                         else if (!strcmp (r->sect, ".fixup"))
350                                 printf ("__start___fixup+0x%08lx", r->offset);
351                         else
352                                 fatal();
353                         if (f->type == 'f' || !r->f)
354                                 printf (",0");
355                         else
356                                 printf (",___fs_%s+0x%08x", r->f->name, (4 + r->frel*2)*4 + 4);
357                         if (j) printf (",");
358                         else printf ("\n");
359                 }
360                 printf("\n");
361         }
362         printf("\n\t.global\t___btfixup_end\n___btfixup_end:\n");
363         printf("\n\n! Define undefined references\n\n");
364         for (i = 0; i < last; i++) {
365                 f = array + i;
366                 if (f->type == 'f') {
367                         printf("\t.global\t___f_%s\n", f->name);
368                         printf("___f_%s:\n", f->name);
369                 }
370         }
371         printf("\tretl\n\t nop\n\n");
372         for (i = 0; i < last; i++) {
373                 f = array + i;
374                 if (f->type != 'f') {
375                         if (!f->initval) {
376                                 printf("\t.global\t___%c_%s\n", f->type, f->name);
377                                 printf("___%c_%s = 0\n", f->type, f->name);
378                         } else {
379                                 printf("\t.global\t___%c_%s__btset_0x%s\n", f->type, f->name, f->initvalstr);
380                                 printf("___%c_%s__btset_0x%s = 0x%08x\n", f->type, f->name, f->initvalstr, f->initval);
381                         }
382                 }
383         }
384         printf("\n\n");
385         exit(0);
386 }