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1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005.
4 */
5
6%option noyywrap nounput noinput never-interactive
7
8%x BYTESTRING
9%x PROPNODENAME
10%s V1
11
12PROPNODECHAR [a-zA-Z0-9,._+*#?@-]
13PATHCHAR ({PROPNODECHAR}|[/])
14LABEL [a-zA-Z_][a-zA-Z0-9_]*
15STRING \"([^\\"]|\\.)*\"
16CHAR_LITERAL '([^']|\\')*'
17WS [[:space:]]
18COMMENT "/*"([^*]|\*+[^*/])*\*+"/"
19LINECOMMENT "//".*\n
20
21%{
22#include "dtc.h"
23#include "srcpos.h"
24#include "dtc-parser.tab.h"
25
26extern bool treesource_error;
27
28/* CAUTION: this will stop working if we ever use yyless() or yyunput() */
29#define YY_USER_ACTION \
30 { \
31 srcpos_update(&yylloc, yytext, yyleng); \
32 }
33
34/*#define LEXDEBUG 1*/
35
36#ifdef LEXDEBUG
37#define DPRINT(fmt, ...) fprintf(stderr, fmt, ##__VA_ARGS__)
38#else
39#define DPRINT(fmt, ...) do { } while (0)
40#endif
41
42static int dts_version = 1;
43
44#define BEGIN_DEFAULT() DPRINT("<V1>\n"); \
45 BEGIN(V1); \
46
47static void push_input_file(const char *filename);
48static bool pop_input_file(void);
49static void PRINTF(1, 2) lexical_error(const char *fmt, ...);
50
51%}
52
53%%
54<*>"/include/"{WS}*{STRING} {
55 char *name = strchr(yytext, '\"') + 1;
56 yytext[yyleng-1] = '\0';
57 push_input_file(name);
58 }
59
60<*>^"#"(line)?[ \t]+[0-9]+[ \t]+{STRING}([ \t]+[0-9]+)* {
61 char *line, *fnstart, *fnend;
62 struct data fn;
63 /* skip text before line # */
64 line = yytext;
65 while (!isdigit((unsigned char)*line))
66 line++;
67
68 /* regexp ensures that first and list "
69 * in the whole yytext are those at
70 * beginning and end of the filename string */
71 fnstart = memchr(yytext, '"', yyleng);
72 for (fnend = yytext + yyleng - 1;
73 *fnend != '"'; fnend--)
74 ;
75 assert(fnstart && fnend && (fnend > fnstart));
76
77 fn = data_copy_escape_string(fnstart + 1,
78 fnend - fnstart - 1);
79
80 /* Don't allow nuls in filenames */
81 if (memchr(fn.val, '\0', fn.len - 1))
82 lexical_error("nul in line number directive");
83
84 /* -1 since #line is the number of the next line */
85 srcpos_set_line(xstrdup(fn.val), atoi(line) - 1);
86 data_free(fn);
87 }
88
89<*><<EOF>> {
90 if (!pop_input_file()) {
91 yyterminate();
92 }
93 }
94
95<*>{STRING} {
96 DPRINT("String: %s\n", yytext);
97 yylval.data = data_copy_escape_string(yytext+1,
98 yyleng-2);
99 return DT_STRING;
100 }
101
102<*>"/dts-v1/" {
103 DPRINT("Keyword: /dts-v1/\n");
104 dts_version = 1;
105 BEGIN_DEFAULT();
106 return DT_V1;
107 }
108
109<*>"/plugin/" {
110 DPRINT("Keyword: /plugin/\n");
111 return DT_PLUGIN;
112 }
113
114<*>"/memreserve/" {
115 DPRINT("Keyword: /memreserve/\n");
116 BEGIN_DEFAULT();
117 return DT_MEMRESERVE;
118 }
119
120<*>"/bits/" {
121 DPRINT("Keyword: /bits/\n");
122 BEGIN_DEFAULT();
123 return DT_BITS;
124 }
125
126<*>"/delete-property/" {
127 DPRINT("Keyword: /delete-property/\n");
128 DPRINT("<PROPNODENAME>\n");
129 BEGIN(PROPNODENAME);
130 return DT_DEL_PROP;
131 }
132
133<*>"/delete-node/" {
134 DPRINT("Keyword: /delete-node/\n");
135 DPRINT("<PROPNODENAME>\n");
136 BEGIN(PROPNODENAME);
137 return DT_DEL_NODE;
138 }
139
140<*>"/omit-if-no-ref/" {
141 DPRINT("Keyword: /omit-if-no-ref/\n");
142 DPRINT("<PROPNODENAME>\n");
143 BEGIN(PROPNODENAME);
144 return DT_OMIT_NO_REF;
145 }
146
147<*>{LABEL}: {
148 DPRINT("Label: %s\n", yytext);
149 yylval.labelref = xstrdup(yytext);
150 yylval.labelref[yyleng-1] = '\0';
151 return DT_LABEL;
152 }
153
154<V1>([0-9]+|0[xX][0-9a-fA-F]+)(U|L|UL|LL|ULL)? {
155 char *e;
156 DPRINT("Integer Literal: '%s'\n", yytext);
157
158 errno = 0;
159 yylval.integer = strtoull(yytext, &e, 0);
160
161 if (*e && e[strspn(e, "UL")]) {
162 lexical_error("Bad integer literal '%s'",
163 yytext);
164 }
165
166 if (errno == ERANGE)
167 lexical_error("Integer literal '%s' out of range",
168 yytext);
169 else
170 /* ERANGE is the only strtoull error triggerable
171 * by strings matching the pattern */
172 assert(errno == 0);
173 return DT_LITERAL;
174 }
175
176<*>{CHAR_LITERAL} {
177 struct data d;
178 DPRINT("Character literal: %s\n", yytext);
179
180 d = data_copy_escape_string(yytext+1, yyleng-2);
181 if (d.len == 1) {
182 lexical_error("Empty character literal");
183 yylval.integer = 0;
184 } else {
185 yylval.integer = (unsigned char)d.val[0];
186
187 if (d.len > 2)
188 lexical_error("Character literal has %d"
189 " characters instead of 1",
190 d.len - 1);
191 }
192
193 data_free(d);
194 return DT_CHAR_LITERAL;
195 }
196
197<*>\&{LABEL} { /* label reference */
198 DPRINT("Ref: %s\n", yytext+1);
199 yylval.labelref = xstrdup(yytext+1);
200 return DT_LABEL_REF;
201 }
202
203<*>"&{"{PATHCHAR}*\} { /* new-style path reference */
204 yytext[yyleng-1] = '\0';
205 DPRINT("Ref: %s\n", yytext+2);
206 yylval.labelref = xstrdup(yytext+2);
207 return DT_PATH_REF;
208 }
209
210<BYTESTRING>[0-9a-fA-F]{2} {
211 yylval.byte = strtol(yytext, NULL, 16);
212 DPRINT("Byte: %02x\n", (int)yylval.byte);
213 return DT_BYTE;
214 }
215
216<BYTESTRING>"]" {
217 DPRINT("/BYTESTRING\n");
218 BEGIN_DEFAULT();
219 return ']';
220 }
221
222<PROPNODENAME>\\?{PROPNODECHAR}+ {
223 DPRINT("PropNodeName: %s\n", yytext);
224 yylval.propnodename = xstrdup((yytext[0] == '\\') ?
225 yytext + 1 : yytext);
226 BEGIN_DEFAULT();
227 return DT_PROPNODENAME;
228 }
229
230"/incbin/" {
231 DPRINT("Binary Include\n");
232 return DT_INCBIN;
233 }
234
235<*>{WS}+ /* eat whitespace */
236<*>{COMMENT}+ /* eat C-style comments */
237<*>{LINECOMMENT}+ /* eat C++-style comments */
238
239<*>"<<" { return DT_LSHIFT; };
240<*>">>" { return DT_RSHIFT; };
241<*>"<=" { return DT_LE; };
242<*>">=" { return DT_GE; };
243<*>"==" { return DT_EQ; };
244<*>"!=" { return DT_NE; };
245<*>"&&" { return DT_AND; };
246<*>"||" { return DT_OR; };
247
248<*>. {
249 DPRINT("Char: %c (\\x%02x)\n", yytext[0],
250 (unsigned)yytext[0]);
251 if (yytext[0] == '[') {
252 DPRINT("<BYTESTRING>\n");
253 BEGIN(BYTESTRING);
254 }
255 if ((yytext[0] == '{')
256 || (yytext[0] == ';')) {
257 DPRINT("<PROPNODENAME>\n");
258 BEGIN(PROPNODENAME);
259 }
260 return yytext[0];
261 }
262
263%%
264
265static void push_input_file(const char *filename)
266{
267 assert(filename);
268
269 srcfile_push(filename);
270
271 yyin = current_srcfile->f;
272
273 yypush_buffer_state(yy_create_buffer(yyin, YY_BUF_SIZE));
274}
275
276
277static bool pop_input_file(void)
278{
279 if (srcfile_pop() == 0)
280 return false;
281
282 yypop_buffer_state();
283 yyin = current_srcfile->f;
284
285 return true;
286}
287
288static void lexical_error(const char *fmt, ...)
289{
290 va_list ap;
291
292 va_start(ap, fmt);
293 srcpos_verror(&yylloc, "Lexical error", fmt, ap);
294 va_end(ap);
295
296 treesource_error = true;
297}
1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005.
4 */
5
6%option noyywrap nounput noinput never-interactive
7
8%x BYTESTRING
9%x PROPNODENAME
10%s V1
11
12PROPNODECHAR [a-zA-Z0-9,._+*#?@-]
13PATHCHAR ({PROPNODECHAR}|[/])
14LABEL [a-zA-Z_][a-zA-Z0-9_]*
15STRING \"([^\\"]|\\.)*\"
16CHAR_LITERAL '([^']|\\')*'
17WS [[:space:]]
18COMMENT "/*"([^*]|\*+[^*/])*\*+"/"
19LINECOMMENT "//".*\n
20
21%{
22#include "dtc.h"
23#include "srcpos.h"
24#include "dtc-parser.tab.h"
25
26YYLTYPE yylloc;
27extern bool treesource_error;
28
29/* CAUTION: this will stop working if we ever use yyless() or yyunput() */
30#define YY_USER_ACTION \
31 { \
32 srcpos_update(&yylloc, yytext, yyleng); \
33 }
34
35/*#define LEXDEBUG 1*/
36
37#ifdef LEXDEBUG
38#define DPRINT(fmt, ...) fprintf(stderr, fmt, ##__VA_ARGS__)
39#else
40#define DPRINT(fmt, ...) do { } while (0)
41#endif
42
43static int dts_version = 1;
44
45#define BEGIN_DEFAULT() DPRINT("<V1>\n"); \
46 BEGIN(V1); \
47
48static void push_input_file(const char *filename);
49static bool pop_input_file(void);
50static void PRINTF(1, 2) lexical_error(const char *fmt, ...);
51
52%}
53
54%%
55<*>"/include/"{WS}*{STRING} {
56 char *name = strchr(yytext, '\"') + 1;
57 yytext[yyleng-1] = '\0';
58 push_input_file(name);
59 }
60
61<*>^"#"(line)?[ \t]+[0-9]+[ \t]+{STRING}([ \t]+[0-9]+)? {
62 char *line, *fnstart, *fnend;
63 struct data fn;
64 /* skip text before line # */
65 line = yytext;
66 while (!isdigit((unsigned char)*line))
67 line++;
68
69 /* regexp ensures that first and list "
70 * in the whole yytext are those at
71 * beginning and end of the filename string */
72 fnstart = memchr(yytext, '"', yyleng);
73 for (fnend = yytext + yyleng - 1;
74 *fnend != '"'; fnend--)
75 ;
76 assert(fnstart && fnend && (fnend > fnstart));
77
78 fn = data_copy_escape_string(fnstart + 1,
79 fnend - fnstart - 1);
80
81 /* Don't allow nuls in filenames */
82 if (memchr(fn.val, '\0', fn.len - 1))
83 lexical_error("nul in line number directive");
84
85 /* -1 since #line is the number of the next line */
86 srcpos_set_line(xstrdup(fn.val), atoi(line) - 1);
87 data_free(fn);
88 }
89
90<*><<EOF>> {
91 if (!pop_input_file()) {
92 yyterminate();
93 }
94 }
95
96<*>{STRING} {
97 DPRINT("String: %s\n", yytext);
98 yylval.data = data_copy_escape_string(yytext+1,
99 yyleng-2);
100 return DT_STRING;
101 }
102
103<*>"/dts-v1/" {
104 DPRINT("Keyword: /dts-v1/\n");
105 dts_version = 1;
106 BEGIN_DEFAULT();
107 return DT_V1;
108 }
109
110<*>"/plugin/" {
111 DPRINT("Keyword: /plugin/\n");
112 return DT_PLUGIN;
113 }
114
115<*>"/memreserve/" {
116 DPRINT("Keyword: /memreserve/\n");
117 BEGIN_DEFAULT();
118 return DT_MEMRESERVE;
119 }
120
121<*>"/bits/" {
122 DPRINT("Keyword: /bits/\n");
123 BEGIN_DEFAULT();
124 return DT_BITS;
125 }
126
127<*>"/delete-property/" {
128 DPRINT("Keyword: /delete-property/\n");
129 DPRINT("<PROPNODENAME>\n");
130 BEGIN(PROPNODENAME);
131 return DT_DEL_PROP;
132 }
133
134<*>"/delete-node/" {
135 DPRINT("Keyword: /delete-node/\n");
136 DPRINT("<PROPNODENAME>\n");
137 BEGIN(PROPNODENAME);
138 return DT_DEL_NODE;
139 }
140
141<*>"/omit-if-no-ref/" {
142 DPRINT("Keyword: /omit-if-no-ref/\n");
143 DPRINT("<PROPNODENAME>\n");
144 BEGIN(PROPNODENAME);
145 return DT_OMIT_NO_REF;
146 }
147
148<*>{LABEL}: {
149 DPRINT("Label: %s\n", yytext);
150 yylval.labelref = xstrdup(yytext);
151 yylval.labelref[yyleng-1] = '\0';
152 return DT_LABEL;
153 }
154
155<V1>([0-9]+|0[xX][0-9a-fA-F]+)(U|L|UL|LL|ULL)? {
156 char *e;
157 DPRINT("Integer Literal: '%s'\n", yytext);
158
159 errno = 0;
160 yylval.integer = strtoull(yytext, &e, 0);
161
162 if (*e && e[strspn(e, "UL")]) {
163 lexical_error("Bad integer literal '%s'",
164 yytext);
165 }
166
167 if (errno == ERANGE)
168 lexical_error("Integer literal '%s' out of range",
169 yytext);
170 else
171 /* ERANGE is the only strtoull error triggerable
172 * by strings matching the pattern */
173 assert(errno == 0);
174 return DT_LITERAL;
175 }
176
177<*>{CHAR_LITERAL} {
178 struct data d;
179 DPRINT("Character literal: %s\n", yytext);
180
181 d = data_copy_escape_string(yytext+1, yyleng-2);
182 if (d.len == 1) {
183 lexical_error("Empty character literal");
184 yylval.integer = 0;
185 } else {
186 yylval.integer = (unsigned char)d.val[0];
187
188 if (d.len > 2)
189 lexical_error("Character literal has %d"
190 " characters instead of 1",
191 d.len - 1);
192 }
193
194 data_free(d);
195 return DT_CHAR_LITERAL;
196 }
197
198<*>\&{LABEL} { /* label reference */
199 DPRINT("Ref: %s\n", yytext+1);
200 yylval.labelref = xstrdup(yytext+1);
201 return DT_LABEL_REF;
202 }
203
204<*>"&{/"{PATHCHAR}*\} { /* new-style path reference */
205 yytext[yyleng-1] = '\0';
206 DPRINT("Ref: %s\n", yytext+2);
207 yylval.labelref = xstrdup(yytext+2);
208 return DT_PATH_REF;
209 }
210
211<BYTESTRING>[0-9a-fA-F]{2} {
212 yylval.byte = strtol(yytext, NULL, 16);
213 DPRINT("Byte: %02x\n", (int)yylval.byte);
214 return DT_BYTE;
215 }
216
217<BYTESTRING>"]" {
218 DPRINT("/BYTESTRING\n");
219 BEGIN_DEFAULT();
220 return ']';
221 }
222
223<PROPNODENAME>\\?{PROPNODECHAR}+ {
224 DPRINT("PropNodeName: %s\n", yytext);
225 yylval.propnodename = xstrdup((yytext[0] == '\\') ?
226 yytext + 1 : yytext);
227 BEGIN_DEFAULT();
228 return DT_PROPNODENAME;
229 }
230
231"/incbin/" {
232 DPRINT("Binary Include\n");
233 return DT_INCBIN;
234 }
235
236<*>{WS}+ /* eat whitespace */
237<*>{COMMENT}+ /* eat C-style comments */
238<*>{LINECOMMENT}+ /* eat C++-style comments */
239
240<*>"<<" { return DT_LSHIFT; };
241<*>">>" { return DT_RSHIFT; };
242<*>"<=" { return DT_LE; };
243<*>">=" { return DT_GE; };
244<*>"==" { return DT_EQ; };
245<*>"!=" { return DT_NE; };
246<*>"&&" { return DT_AND; };
247<*>"||" { return DT_OR; };
248
249<*>. {
250 DPRINT("Char: %c (\\x%02x)\n", yytext[0],
251 (unsigned)yytext[0]);
252 if (yytext[0] == '[') {
253 DPRINT("<BYTESTRING>\n");
254 BEGIN(BYTESTRING);
255 }
256 if ((yytext[0] == '{')
257 || (yytext[0] == ';')) {
258 DPRINT("<PROPNODENAME>\n");
259 BEGIN(PROPNODENAME);
260 }
261 return yytext[0];
262 }
263
264%%
265
266static void push_input_file(const char *filename)
267{
268 assert(filename);
269
270 srcfile_push(filename);
271
272 yyin = current_srcfile->f;
273
274 yypush_buffer_state(yy_create_buffer(yyin, YY_BUF_SIZE));
275}
276
277
278static bool pop_input_file(void)
279{
280 if (srcfile_pop() == 0)
281 return false;
282
283 yypop_buffer_state();
284 yyin = current_srcfile->f;
285
286 return true;
287}
288
289static void lexical_error(const char *fmt, ...)
290{
291 va_list ap;
292
293 va_start(ap, fmt);
294 srcpos_verror(&yylloc, "Lexical error", fmt, ap);
295 va_end(ap);
296
297 treesource_error = true;
298}