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1/*
2 * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005.
3 *
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation; either version 2 of the
8 * License, or (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
18 * USA
19 */
20%{
21#include <stdio.h>
22
23#include "dtc.h"
24#include "srcpos.h"
25
26extern int yylex(void);
27extern void yyerror(char const *s);
28#define ERROR(loc, ...) \
29 do { \
30 srcpos_error((loc), "Error", __VA_ARGS__); \
31 treesource_error = true; \
32 } while (0)
33
34extern struct boot_info *the_boot_info;
35extern bool treesource_error;
36%}
37
38%union {
39 char *propnodename;
40 char *labelref;
41 uint8_t byte;
42 struct data data;
43
44 struct {
45 struct data data;
46 int bits;
47 } array;
48
49 struct property *prop;
50 struct property *proplist;
51 struct node *node;
52 struct node *nodelist;
53 struct reserve_info *re;
54 uint64_t integer;
55}
56
57%token DT_V1
58%token DT_MEMRESERVE
59%token DT_LSHIFT DT_RSHIFT DT_LE DT_GE DT_EQ DT_NE DT_AND DT_OR
60%token DT_BITS
61%token DT_DEL_PROP
62%token DT_DEL_NODE
63%token <propnodename> DT_PROPNODENAME
64%token <integer> DT_LITERAL
65%token <integer> DT_CHAR_LITERAL
66%token <byte> DT_BYTE
67%token <data> DT_STRING
68%token <labelref> DT_LABEL
69%token <labelref> DT_REF
70%token DT_INCBIN
71
72%type <data> propdata
73%type <data> propdataprefix
74%type <re> memreserve
75%type <re> memreserves
76%type <array> arrayprefix
77%type <data> bytestring
78%type <prop> propdef
79%type <proplist> proplist
80
81%type <node> devicetree
82%type <node> nodedef
83%type <node> subnode
84%type <nodelist> subnodes
85
86%type <integer> integer_prim
87%type <integer> integer_unary
88%type <integer> integer_mul
89%type <integer> integer_add
90%type <integer> integer_shift
91%type <integer> integer_rela
92%type <integer> integer_eq
93%type <integer> integer_bitand
94%type <integer> integer_bitxor
95%type <integer> integer_bitor
96%type <integer> integer_and
97%type <integer> integer_or
98%type <integer> integer_trinary
99%type <integer> integer_expr
100
101%%
102
103sourcefile:
104 DT_V1 ';' memreserves devicetree
105 {
106 the_boot_info = build_boot_info($3, $4,
107 guess_boot_cpuid($4));
108 }
109 ;
110
111memreserves:
112 /* empty */
113 {
114 $$ = NULL;
115 }
116 | memreserve memreserves
117 {
118 $$ = chain_reserve_entry($1, $2);
119 }
120 ;
121
122memreserve:
123 DT_MEMRESERVE integer_prim integer_prim ';'
124 {
125 $$ = build_reserve_entry($2, $3);
126 }
127 | DT_LABEL memreserve
128 {
129 add_label(&$2->labels, $1);
130 $$ = $2;
131 }
132 ;
133
134devicetree:
135 '/' nodedef
136 {
137 $$ = name_node($2, "");
138 }
139 | devicetree '/' nodedef
140 {
141 $$ = merge_nodes($1, $3);
142 }
143
144 | devicetree DT_LABEL DT_REF nodedef
145 {
146 struct node *target = get_node_by_ref($1, $3);
147
148 add_label(&target->labels, $2);
149 if (target)
150 merge_nodes(target, $4);
151 else
152 ERROR(&@3, "Label or path %s not found", $3);
153 $$ = $1;
154 }
155 | devicetree DT_REF nodedef
156 {
157 struct node *target = get_node_by_ref($1, $2);
158
159 if (target)
160 merge_nodes(target, $3);
161 else
162 ERROR(&@2, "Label or path %s not found", $2);
163 $$ = $1;
164 }
165 | devicetree DT_DEL_NODE DT_REF ';'
166 {
167 struct node *target = get_node_by_ref($1, $3);
168
169 if (target)
170 delete_node(target);
171 else
172 ERROR(&@3, "Label or path %s not found", $3);
173
174
175 $$ = $1;
176 }
177 ;
178
179nodedef:
180 '{' proplist subnodes '}' ';'
181 {
182 $$ = build_node($2, $3);
183 }
184 ;
185
186proplist:
187 /* empty */
188 {
189 $$ = NULL;
190 }
191 | proplist propdef
192 {
193 $$ = chain_property($2, $1);
194 }
195 ;
196
197propdef:
198 DT_PROPNODENAME '=' propdata ';'
199 {
200 $$ = build_property($1, $3);
201 }
202 | DT_PROPNODENAME ';'
203 {
204 $$ = build_property($1, empty_data);
205 }
206 | DT_DEL_PROP DT_PROPNODENAME ';'
207 {
208 $$ = build_property_delete($2);
209 }
210 | DT_LABEL propdef
211 {
212 add_label(&$2->labels, $1);
213 $$ = $2;
214 }
215 ;
216
217propdata:
218 propdataprefix DT_STRING
219 {
220 $$ = data_merge($1, $2);
221 }
222 | propdataprefix arrayprefix '>'
223 {
224 $$ = data_merge($1, $2.data);
225 }
226 | propdataprefix '[' bytestring ']'
227 {
228 $$ = data_merge($1, $3);
229 }
230 | propdataprefix DT_REF
231 {
232 $$ = data_add_marker($1, REF_PATH, $2);
233 }
234 | propdataprefix DT_INCBIN '(' DT_STRING ',' integer_prim ',' integer_prim ')'
235 {
236 FILE *f = srcfile_relative_open($4.val, NULL);
237 struct data d;
238
239 if ($6 != 0)
240 if (fseek(f, $6, SEEK_SET) != 0)
241 die("Couldn't seek to offset %llu in \"%s\": %s",
242 (unsigned long long)$6, $4.val,
243 strerror(errno));
244
245 d = data_copy_file(f, $8);
246
247 $$ = data_merge($1, d);
248 fclose(f);
249 }
250 | propdataprefix DT_INCBIN '(' DT_STRING ')'
251 {
252 FILE *f = srcfile_relative_open($4.val, NULL);
253 struct data d = empty_data;
254
255 d = data_copy_file(f, -1);
256
257 $$ = data_merge($1, d);
258 fclose(f);
259 }
260 | propdata DT_LABEL
261 {
262 $$ = data_add_marker($1, LABEL, $2);
263 }
264 ;
265
266propdataprefix:
267 /* empty */
268 {
269 $$ = empty_data;
270 }
271 | propdata ','
272 {
273 $$ = $1;
274 }
275 | propdataprefix DT_LABEL
276 {
277 $$ = data_add_marker($1, LABEL, $2);
278 }
279 ;
280
281arrayprefix:
282 DT_BITS DT_LITERAL '<'
283 {
284 unsigned long long bits;
285
286 bits = $2;
287
288 if ((bits != 8) && (bits != 16) &&
289 (bits != 32) && (bits != 64)) {
290 ERROR(&@2, "Array elements must be"
291 " 8, 16, 32 or 64-bits");
292 bits = 32;
293 }
294
295 $$.data = empty_data;
296 $$.bits = bits;
297 }
298 | '<'
299 {
300 $$.data = empty_data;
301 $$.bits = 32;
302 }
303 | arrayprefix integer_prim
304 {
305 if ($1.bits < 64) {
306 uint64_t mask = (1ULL << $1.bits) - 1;
307 /*
308 * Bits above mask must either be all zero
309 * (positive within range of mask) or all one
310 * (negative and sign-extended). The second
311 * condition is true if when we set all bits
312 * within the mask to one (i.e. | in the
313 * mask), all bits are one.
314 */
315 if (($2 > mask) && (($2 | mask) != -1ULL))
316 ERROR(&@2, "Value out of range for"
317 " %d-bit array element", $1.bits);
318 }
319
320 $$.data = data_append_integer($1.data, $2, $1.bits);
321 }
322 | arrayprefix DT_REF
323 {
324 uint64_t val = ~0ULL >> (64 - $1.bits);
325
326 if ($1.bits == 32)
327 $1.data = data_add_marker($1.data,
328 REF_PHANDLE,
329 $2);
330 else
331 ERROR(&@2, "References are only allowed in "
332 "arrays with 32-bit elements.");
333
334 $$.data = data_append_integer($1.data, val, $1.bits);
335 }
336 | arrayprefix DT_LABEL
337 {
338 $$.data = data_add_marker($1.data, LABEL, $2);
339 }
340 ;
341
342integer_prim:
343 DT_LITERAL
344 | DT_CHAR_LITERAL
345 | '(' integer_expr ')'
346 {
347 $$ = $2;
348 }
349 ;
350
351integer_expr:
352 integer_trinary
353 ;
354
355integer_trinary:
356 integer_or
357 | integer_or '?' integer_expr ':' integer_trinary { $$ = $1 ? $3 : $5; }
358 ;
359
360integer_or:
361 integer_and
362 | integer_or DT_OR integer_and { $$ = $1 || $3; }
363 ;
364
365integer_and:
366 integer_bitor
367 | integer_and DT_AND integer_bitor { $$ = $1 && $3; }
368 ;
369
370integer_bitor:
371 integer_bitxor
372 | integer_bitor '|' integer_bitxor { $$ = $1 | $3; }
373 ;
374
375integer_bitxor:
376 integer_bitand
377 | integer_bitxor '^' integer_bitand { $$ = $1 ^ $3; }
378 ;
379
380integer_bitand:
381 integer_eq
382 | integer_bitand '&' integer_eq { $$ = $1 & $3; }
383 ;
384
385integer_eq:
386 integer_rela
387 | integer_eq DT_EQ integer_rela { $$ = $1 == $3; }
388 | integer_eq DT_NE integer_rela { $$ = $1 != $3; }
389 ;
390
391integer_rela:
392 integer_shift
393 | integer_rela '<' integer_shift { $$ = $1 < $3; }
394 | integer_rela '>' integer_shift { $$ = $1 > $3; }
395 | integer_rela DT_LE integer_shift { $$ = $1 <= $3; }
396 | integer_rela DT_GE integer_shift { $$ = $1 >= $3; }
397 ;
398
399integer_shift:
400 integer_shift DT_LSHIFT integer_add { $$ = $1 << $3; }
401 | integer_shift DT_RSHIFT integer_add { $$ = $1 >> $3; }
402 | integer_add
403 ;
404
405integer_add:
406 integer_add '+' integer_mul { $$ = $1 + $3; }
407 | integer_add '-' integer_mul { $$ = $1 - $3; }
408 | integer_mul
409 ;
410
411integer_mul:
412 integer_mul '*' integer_unary { $$ = $1 * $3; }
413 | integer_mul '/' integer_unary
414 {
415 if ($3 != 0) {
416 $$ = $1 / $3;
417 } else {
418 ERROR(&@$, "Division by zero");
419 $$ = 0;
420 }
421 }
422 | integer_mul '%' integer_unary
423 {
424 if ($3 != 0) {
425 $$ = $1 % $3;
426 } else {
427 ERROR(&@$, "Division by zero");
428 $$ = 0;
429 }
430 }
431 | integer_unary
432 ;
433
434integer_unary:
435 integer_prim
436 | '-' integer_unary { $$ = -$2; }
437 | '~' integer_unary { $$ = ~$2; }
438 | '!' integer_unary { $$ = !$2; }
439 ;
440
441bytestring:
442 /* empty */
443 {
444 $$ = empty_data;
445 }
446 | bytestring DT_BYTE
447 {
448 $$ = data_append_byte($1, $2);
449 }
450 | bytestring DT_LABEL
451 {
452 $$ = data_add_marker($1, LABEL, $2);
453 }
454 ;
455
456subnodes:
457 /* empty */
458 {
459 $$ = NULL;
460 }
461 | subnode subnodes
462 {
463 $$ = chain_node($1, $2);
464 }
465 | subnode propdef
466 {
467 ERROR(&@2, "Properties must precede subnodes");
468 YYERROR;
469 }
470 ;
471
472subnode:
473 DT_PROPNODENAME nodedef
474 {
475 $$ = name_node($2, $1);
476 }
477 | DT_DEL_NODE DT_PROPNODENAME ';'
478 {
479 $$ = name_node(build_node_delete(), $2);
480 }
481 | DT_LABEL subnode
482 {
483 add_label(&$2->labels, $1);
484 $$ = $2;
485 }
486 ;
487
488%%
489
490void yyerror(char const *s)
491{
492 ERROR(&yylloc, "%s", s);
493}
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005.
4 */
5%locations
6
7%{
8#include <stdio.h>
9#include <inttypes.h>
10
11#include "dtc.h"
12#include "srcpos.h"
13
14extern int yylex(void);
15extern void yyerror(char const *s);
16#define ERROR(loc, ...) \
17 do { \
18 srcpos_error((loc), "Error", __VA_ARGS__); \
19 treesource_error = true; \
20 } while (0)
21
22#define YYERROR_CALL(msg) yyerror(msg)
23
24extern struct dt_info *parser_output;
25extern bool treesource_error;
26
27static bool is_ref_relative(const char *ref)
28{
29 return ref[0] != '/' && strchr(&ref[1], '/');
30}
31
32%}
33
34%union {
35 char *propnodename;
36 char *labelref;
37 uint8_t byte;
38 struct data data;
39
40 struct {
41 struct data data;
42 int bits;
43 } array;
44
45 struct property *prop;
46 struct property *proplist;
47 struct node *node;
48 struct node *nodelist;
49 struct reserve_info *re;
50 uint64_t integer;
51 unsigned int flags;
52}
53
54%token DT_V1
55%token DT_PLUGIN
56%token DT_MEMRESERVE
57%token DT_LSHIFT DT_RSHIFT DT_LE DT_GE DT_EQ DT_NE DT_AND DT_OR
58%token DT_BITS
59%token DT_DEL_PROP
60%token DT_DEL_NODE
61%token DT_OMIT_NO_REF
62%token <propnodename> DT_PROPNODENAME
63%token <integer> DT_LITERAL
64%token <integer> DT_CHAR_LITERAL
65%token <byte> DT_BYTE
66%token <data> DT_STRING
67%token <labelref> DT_LABEL
68%token <labelref> DT_LABEL_REF
69%token <labelref> DT_PATH_REF
70%token DT_INCBIN
71
72%type <data> propdata
73%type <data> propdataprefix
74%type <flags> header
75%type <flags> headers
76%type <re> memreserve
77%type <re> memreserves
78%type <array> arrayprefix
79%type <data> bytestring
80%type <prop> propdef
81%type <proplist> proplist
82%type <labelref> dt_ref
83
84%type <node> devicetree
85%type <node> nodedef
86%type <node> subnode
87%type <nodelist> subnodes
88
89%type <integer> integer_prim
90%type <integer> integer_unary
91%type <integer> integer_mul
92%type <integer> integer_add
93%type <integer> integer_shift
94%type <integer> integer_rela
95%type <integer> integer_eq
96%type <integer> integer_bitand
97%type <integer> integer_bitxor
98%type <integer> integer_bitor
99%type <integer> integer_and
100%type <integer> integer_or
101%type <integer> integer_trinary
102%type <integer> integer_expr
103
104%%
105
106sourcefile:
107 headers memreserves devicetree
108 {
109 parser_output = build_dt_info($1, $2, $3,
110 guess_boot_cpuid($3));
111 }
112 ;
113
114header:
115 DT_V1 ';'
116 {
117 $$ = DTSF_V1;
118 }
119 | DT_V1 ';' DT_PLUGIN ';'
120 {
121 $$ = DTSF_V1 | DTSF_PLUGIN;
122 }
123 ;
124
125headers:
126 header
127 | header headers
128 {
129 if ($2 != $1)
130 ERROR(&@2, "Header flags don't match earlier ones");
131 $$ = $1;
132 }
133 ;
134
135memreserves:
136 /* empty */
137 {
138 $$ = NULL;
139 }
140 | memreserve memreserves
141 {
142 $$ = chain_reserve_entry($1, $2);
143 }
144 ;
145
146memreserve:
147 DT_MEMRESERVE integer_prim integer_prim ';'
148 {
149 $$ = build_reserve_entry($2, $3);
150 }
151 | DT_LABEL memreserve
152 {
153 add_label(&$2->labels, $1);
154 $$ = $2;
155 }
156 ;
157
158dt_ref: DT_LABEL_REF | DT_PATH_REF;
159
160devicetree:
161 '/' nodedef
162 {
163 $$ = name_node($2, "");
164 }
165 | devicetree '/' nodedef
166 {
167 $$ = merge_nodes($1, $3);
168 }
169 | dt_ref nodedef
170 {
171 /*
172 * We rely on the rule being always:
173 * versioninfo plugindecl memreserves devicetree
174 * so $-1 is what we want (plugindecl)
175 */
176 if (!($<flags>-1 & DTSF_PLUGIN))
177 ERROR(&@2, "Label or path %s not found", $1);
178 else if (is_ref_relative($1))
179 ERROR(&@2, "Label-relative reference %s not supported in plugin", $1);
180 $$ = add_orphan_node(
181 name_node(build_node(NULL, NULL, NULL),
182 ""),
183 $2, $1);
184 }
185 | devicetree DT_LABEL dt_ref nodedef
186 {
187 struct node *target = get_node_by_ref($1, $3);
188
189 if (($<flags>-1 & DTSF_PLUGIN) && is_ref_relative($3))
190 ERROR(&@2, "Label-relative reference %s not supported in plugin", $3);
191
192 if (target) {
193 add_label(&target->labels, $2);
194 merge_nodes(target, $4);
195 } else
196 ERROR(&@3, "Label or path %s not found", $3);
197 $$ = $1;
198 }
199 | devicetree DT_PATH_REF nodedef
200 {
201 /*
202 * We rely on the rule being always:
203 * versioninfo plugindecl memreserves devicetree
204 * so $-1 is what we want (plugindecl)
205 */
206 if ($<flags>-1 & DTSF_PLUGIN) {
207 if (is_ref_relative($2))
208 ERROR(&@2, "Label-relative reference %s not supported in plugin", $2);
209 add_orphan_node($1, $3, $2);
210 } else {
211 struct node *target = get_node_by_ref($1, $2);
212
213 if (target)
214 merge_nodes(target, $3);
215 else
216 ERROR(&@2, "Label or path %s not found", $2);
217 }
218 $$ = $1;
219 }
220 | devicetree DT_LABEL_REF nodedef
221 {
222 struct node *target = get_node_by_ref($1, $2);
223
224 if (target) {
225 merge_nodes(target, $3);
226 } else {
227 /*
228 * We rely on the rule being always:
229 * versioninfo plugindecl memreserves devicetree
230 * so $-1 is what we want (plugindecl)
231 */
232 if ($<flags>-1 & DTSF_PLUGIN)
233 add_orphan_node($1, $3, $2);
234 else
235 ERROR(&@2, "Label or path %s not found", $2);
236 }
237 $$ = $1;
238 }
239 | devicetree DT_DEL_NODE dt_ref ';'
240 {
241 struct node *target = get_node_by_ref($1, $3);
242
243 if (target)
244 delete_node(target);
245 else
246 ERROR(&@3, "Label or path %s not found", $3);
247
248
249 $$ = $1;
250 }
251 | devicetree DT_OMIT_NO_REF dt_ref ';'
252 {
253 struct node *target = get_node_by_ref($1, $3);
254
255 if (target)
256 omit_node_if_unused(target);
257 else
258 ERROR(&@3, "Label or path %s not found", $3);
259
260
261 $$ = $1;
262 }
263 ;
264
265nodedef:
266 '{' proplist subnodes '}' ';'
267 {
268 $$ = build_node($2, $3, &@$);
269 }
270 ;
271
272proplist:
273 /* empty */
274 {
275 $$ = NULL;
276 }
277 | proplist propdef
278 {
279 $$ = chain_property($2, $1);
280 }
281 ;
282
283propdef:
284 DT_PROPNODENAME '=' propdata ';'
285 {
286 $$ = build_property($1, $3, &@$);
287 }
288 | DT_PROPNODENAME ';'
289 {
290 $$ = build_property($1, empty_data, &@$);
291 }
292 | DT_DEL_PROP DT_PROPNODENAME ';'
293 {
294 $$ = build_property_delete($2);
295 }
296 | DT_LABEL propdef
297 {
298 add_label(&$2->labels, $1);
299 $$ = $2;
300 }
301 ;
302
303propdata:
304 propdataprefix DT_STRING
305 {
306 $$ = data_merge($1, $2);
307 }
308 | propdataprefix arrayprefix '>'
309 {
310 $$ = data_merge($1, $2.data);
311 }
312 | propdataprefix '[' bytestring ']'
313 {
314 $$ = data_merge($1, $3);
315 }
316 | propdataprefix dt_ref
317 {
318 $1 = data_add_marker($1, TYPE_STRING, $2);
319 $$ = data_add_marker($1, REF_PATH, $2);
320 }
321 | propdataprefix DT_INCBIN '(' DT_STRING ',' integer_prim ',' integer_prim ')'
322 {
323 FILE *f = srcfile_relative_open($4.val, NULL);
324 struct data d;
325
326 if ($6 != 0)
327 if (fseek(f, $6, SEEK_SET) != 0)
328 die("Couldn't seek to offset %llu in \"%s\": %s",
329 (unsigned long long)$6, $4.val,
330 strerror(errno));
331
332 d = data_copy_file(f, $8);
333
334 $$ = data_merge($1, d);
335 fclose(f);
336 }
337 | propdataprefix DT_INCBIN '(' DT_STRING ')'
338 {
339 FILE *f = srcfile_relative_open($4.val, NULL);
340 struct data d = empty_data;
341
342 d = data_copy_file(f, -1);
343
344 $$ = data_merge($1, d);
345 fclose(f);
346 }
347 | propdata DT_LABEL
348 {
349 $$ = data_add_marker($1, LABEL, $2);
350 }
351 ;
352
353propdataprefix:
354 /* empty */
355 {
356 $$ = empty_data;
357 }
358 | propdata ','
359 {
360 $$ = $1;
361 }
362 | propdataprefix DT_LABEL
363 {
364 $$ = data_add_marker($1, LABEL, $2);
365 }
366 ;
367
368arrayprefix:
369 DT_BITS DT_LITERAL '<'
370 {
371 unsigned long long bits;
372 enum markertype type = TYPE_UINT32;
373
374 bits = $2;
375
376 switch (bits) {
377 case 8: type = TYPE_UINT8; break;
378 case 16: type = TYPE_UINT16; break;
379 case 32: type = TYPE_UINT32; break;
380 case 64: type = TYPE_UINT64; break;
381 default:
382 ERROR(&@2, "Array elements must be"
383 " 8, 16, 32 or 64-bits");
384 bits = 32;
385 }
386
387 $$.data = data_add_marker(empty_data, type, NULL);
388 $$.bits = bits;
389 }
390 | '<'
391 {
392 $$.data = data_add_marker(empty_data, TYPE_UINT32, NULL);
393 $$.bits = 32;
394 }
395 | arrayprefix integer_prim
396 {
397 if ($1.bits < 64) {
398 uint64_t mask = (1ULL << $1.bits) - 1;
399 /*
400 * Bits above mask must either be all zero
401 * (positive within range of mask) or all one
402 * (negative and sign-extended). The second
403 * condition is true if when we set all bits
404 * within the mask to one (i.e. | in the
405 * mask), all bits are one.
406 */
407 if (($2 > mask) && (($2 | mask) != -1ULL)) {
408 char *loc = srcpos_string(&@2);
409 fprintf(stderr,
410 "WARNING: %s: Value 0x%016" PRIx64
411 " truncated to 0x%0*" PRIx64 "\n",
412 loc, $2, $1.bits / 4, ($2 & mask));
413 free(loc);
414 }
415 }
416
417 $$.data = data_append_integer($1.data, $2, $1.bits);
418 }
419 | arrayprefix dt_ref
420 {
421 uint64_t val = ~0ULL >> (64 - $1.bits);
422
423 if ($1.bits == 32)
424 $1.data = data_add_marker($1.data,
425 REF_PHANDLE,
426 $2);
427 else
428 ERROR(&@2, "References are only allowed in "
429 "arrays with 32-bit elements.");
430
431 $$.data = data_append_integer($1.data, val, $1.bits);
432 }
433 | arrayprefix DT_LABEL
434 {
435 $$.data = data_add_marker($1.data, LABEL, $2);
436 }
437 ;
438
439integer_prim:
440 DT_LITERAL
441 | DT_CHAR_LITERAL
442 | '(' integer_expr ')'
443 {
444 $$ = $2;
445 }
446 ;
447
448integer_expr:
449 integer_trinary
450 ;
451
452integer_trinary:
453 integer_or
454 | integer_or '?' integer_expr ':' integer_trinary { $$ = $1 ? $3 : $5; }
455 ;
456
457integer_or:
458 integer_and
459 | integer_or DT_OR integer_and { $$ = $1 || $3; }
460 ;
461
462integer_and:
463 integer_bitor
464 | integer_and DT_AND integer_bitor { $$ = $1 && $3; }
465 ;
466
467integer_bitor:
468 integer_bitxor
469 | integer_bitor '|' integer_bitxor { $$ = $1 | $3; }
470 ;
471
472integer_bitxor:
473 integer_bitand
474 | integer_bitxor '^' integer_bitand { $$ = $1 ^ $3; }
475 ;
476
477integer_bitand:
478 integer_eq
479 | integer_bitand '&' integer_eq { $$ = $1 & $3; }
480 ;
481
482integer_eq:
483 integer_rela
484 | integer_eq DT_EQ integer_rela { $$ = $1 == $3; }
485 | integer_eq DT_NE integer_rela { $$ = $1 != $3; }
486 ;
487
488integer_rela:
489 integer_shift
490 | integer_rela '<' integer_shift { $$ = $1 < $3; }
491 | integer_rela '>' integer_shift { $$ = $1 > $3; }
492 | integer_rela DT_LE integer_shift { $$ = $1 <= $3; }
493 | integer_rela DT_GE integer_shift { $$ = $1 >= $3; }
494 ;
495
496integer_shift:
497 integer_shift DT_LSHIFT integer_add { $$ = ($3 < 64) ? ($1 << $3) : 0; }
498 | integer_shift DT_RSHIFT integer_add { $$ = ($3 < 64) ? ($1 >> $3) : 0; }
499 | integer_add
500 ;
501
502integer_add:
503 integer_add '+' integer_mul { $$ = $1 + $3; }
504 | integer_add '-' integer_mul { $$ = $1 - $3; }
505 | integer_mul
506 ;
507
508integer_mul:
509 integer_mul '*' integer_unary { $$ = $1 * $3; }
510 | integer_mul '/' integer_unary
511 {
512 if ($3 != 0) {
513 $$ = $1 / $3;
514 } else {
515 ERROR(&@$, "Division by zero");
516 $$ = 0;
517 }
518 }
519 | integer_mul '%' integer_unary
520 {
521 if ($3 != 0) {
522 $$ = $1 % $3;
523 } else {
524 ERROR(&@$, "Division by zero");
525 $$ = 0;
526 }
527 }
528 | integer_unary
529 ;
530
531integer_unary:
532 integer_prim
533 | '-' integer_unary { $$ = -$2; }
534 | '~' integer_unary { $$ = ~$2; }
535 | '!' integer_unary { $$ = !$2; }
536 ;
537
538bytestring:
539 /* empty */
540 {
541 $$ = data_add_marker(empty_data, TYPE_UINT8, NULL);
542 }
543 | bytestring DT_BYTE
544 {
545 $$ = data_append_byte($1, $2);
546 }
547 | bytestring DT_LABEL
548 {
549 $$ = data_add_marker($1, LABEL, $2);
550 }
551 ;
552
553subnodes:
554 /* empty */
555 {
556 $$ = NULL;
557 }
558 | subnode subnodes
559 {
560 $$ = chain_node($1, $2);
561 }
562 | subnode propdef
563 {
564 ERROR(&@2, "Properties must precede subnodes");
565 YYERROR;
566 }
567 ;
568
569subnode:
570 DT_PROPNODENAME nodedef
571 {
572 $$ = name_node($2, $1);
573 }
574 | DT_DEL_NODE DT_PROPNODENAME ';'
575 {
576 $$ = name_node(build_node_delete(&@$), $2);
577 }
578 | DT_OMIT_NO_REF subnode
579 {
580 $$ = omit_node_if_unused($2);
581 }
582 | DT_LABEL subnode
583 {
584 add_label(&$2->labels, $1);
585 $$ = $2;
586 }
587 ;
588
589%%
590
591void yyerror(char const *s)
592{
593 ERROR(&yylloc, "%s", s);
594}