1 /* 2 * (C) Copyright David Gibson <dwg (at) 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 %option noyywrap nounput noinput never-interactive 22 23 %x BYTESTRING 24 %x PROPNODENAME 25 %s V1 26 27 PROPNODECHAR [a-zA-Z0-9,._+*#?@-] 28 PATHCHAR ({PROPNODECHAR}|[/]) 29 LABEL [a-zA-Z_][a-zA-Z0-9_]* 30 STRING \"([^\\"]|\\.)*\" 31 CHAR_LITERAL '([^']|\\')*' 32 WS [[:space:]] 33 COMMENT "/*"([^*]|\*+[^*/])*\*+"/" 34 LINECOMMENT "//".*\n 35 36 %{ 37 #include "dtc.h" 38 #include "srcpos.h" 39 #include "dtc-parser.h" 40 41 YYLTYPE yylloc; 42 extern bool treesource_error; 43 44 /* CAUTION: this will stop working if we ever use yyless() or yyunput() */ 45 #define YY_USER_ACTION \ 46 { \ 47 srcpos_update(&yylloc, yytext, yyleng); \ 48 } 49 50 /*#define LEXDEBUG 1*/ 51 52 #ifdef LEXDEBUG 53 #define DPRINT(fmt, ...) fprintf(stderr, fmt, ##__VA_ARGS__) 54 #else 55 #define DPRINT(fmt, ...) do { } while (0) 56 #endif 57 58 static int dts_version = 1; 59 60 #define BEGIN_DEFAULT() DPRINT("<V1>\n"); \ 61 BEGIN(V1); \ 62 63 static void push_input_file(const char *filename); 64 static bool pop_input_file(void); 65 static void lexical_error(const char *fmt, ...); 66 %} 67 68 %% 69 <*>"/include/"{WS}*{STRING} { 70 char *name = strchr(yytext, '\"') + 1; 71 yytext[yyleng-1] = '\0'; 72 push_input_file(name); 73 } 74 75 <*>^"#"(line)?[ \t]+[0-9]+[ \t]+{STRING}([ \t]+[0-9]+)? { 76 char *line, *fnstart, *fnend; 77 struct data fn; 78 /* skip text before line # */ 79 line = yytext; 80 while (!isdigit((unsigned char)*line)) 81 line++; 82 83 /* regexp ensures that first and list " 84 * in the whole yytext are those at 85 * beginning and end of the filename string */ 86 fnstart = memchr(yytext, '"', yyleng); 87 for (fnend = yytext + yyleng - 1; 88 *fnend != '"'; fnend--) 89 ; 90 assert(fnstart && fnend && (fnend > fnstart)); 91 92 fn = data_copy_escape_string(fnstart + 1, 93 fnend - fnstart - 1); 94 95 /* Don't allow nuls in filenames */ 96 if (memchr(fn.val, '\0', fn.len - 1)) 97 lexical_error("nul in line number directive"); 98 99 /* -1 since #line is the number of the next line */ 100 srcpos_set_line(xstrdup(fn.val), atoi(line) - 1); 101 data_free(fn); 102 } 103 104 <*><<EOF>> { 105 if (!pop_input_file()) { 106 yyterminate(); 107 } 108 } 109 110 <*>{STRING} { 111 DPRINT("String: %s\n", yytext); 112 yylval.data = data_copy_escape_string(yytext+1, 113 yyleng-2); 114 return DT_STRING; 115 } 116 117 <*>"/dts-v1/" { 118 DPRINT("Keyword: /dts-v1/\n"); 119 dts_version = 1; 120 BEGIN_DEFAULT(); 121 return DT_V1; 122 } 123 124 <*>"/plugin/" { 125 DPRINT("Keyword: /plugin/\n"); 126 return DT_PLUGIN; 127 } 128 129 <*>"/memreserve/" { 130 DPRINT("Keyword: /memreserve/\n"); 131 BEGIN_DEFAULT(); 132 return DT_MEMRESERVE; 133 } 134 135 <*>"/bits/" { 136 DPRINT("Keyword: /bits/\n"); 137 BEGIN_DEFAULT(); 138 return DT_BITS; 139 } 140 141 <*>"/delete-property/" { 142 DPRINT("Keyword: /delete-property/\n"); 143 DPRINT("<PROPNODENAME>\n"); 144 BEGIN(PROPNODENAME); 145 return DT_DEL_PROP; 146 } 147 148 <*>"/delete-node/" { 149 DPRINT("Keyword: /delete-node/\n"); 150 DPRINT("<PROPNODENAME>\n"); 151 BEGIN(PROPNODENAME); 152 return DT_DEL_NODE; 153 } 154 155 <*>{LABEL}: { 156 DPRINT("Label: %s\n", yytext); 157 yylval.labelref = xstrdup(yytext); 158 yylval.labelref[yyleng-1] = '\0'; 159 return DT_LABEL; 160 } 161 162 <V1>([0-9]+|0[xX][0-9a-fA-F]+)(U|L|UL|LL|ULL)? { 163 char *e; 164 DPRINT("Integer Literal: '%s'\n", yytext); 165 166 errno = 0; 167 yylval.integer = strtoull(yytext, &e, 0); 168 169 if (*e && e[strspn(e, "UL")]) { 170 lexical_error("Bad integer literal '%s'", 171 yytext); 172 } 173 174 if (errno == ERANGE) 175 lexical_error("Integer literal '%s' out of range", 176 yytext); 177 else 178 /* ERANGE is the only strtoull error triggerable 179 * by strings matching the pattern */ 180 assert(errno == 0); 181 return DT_LITERAL; 182 } 183 184 <*>{CHAR_LITERAL} { 185 struct data d; 186 DPRINT("Character literal: %s\n", yytext); 187 188 d = data_copy_escape_string(yytext+1, yyleng-2); 189 if (d.len == 1) { 190 lexical_error("Empty character literal"); 191 yylval.integer = 0; 192 } else { 193 yylval.integer = (unsigned char)d.val[0]; 194 195 if (d.len > 2) 196 lexical_error("Character literal has %d" 197 " characters instead of 1", 198 d.len - 1); 199 } 200 201 data_free(d); 202 return DT_CHAR_LITERAL; 203 } 204 205 <*>\&{LABEL} { /* label reference */ 206 DPRINT("Ref: %s\n", yytext+1); 207 yylval.labelref = xstrdup(yytext+1); 208 return DT_REF; 209 } 210 211 <*>"&{/"{PATHCHAR}*\} { /* new-style path reference */ 212 yytext[yyleng-1] = '\0'; 213 DPRINT("Ref: %s\n", yytext+2); 214 yylval.labelref = xstrdup(yytext+2); 215 return DT_REF; 216 } 217 218 <BYTESTRING>[0-9a-fA-F]{2} { 219 yylval.byte = strtol(yytext, NULL, 16); 220 DPRINT("Byte: %02x\n", (int)yylval.byte); 221 return DT_BYTE; 222 } 223 224 <BYTESTRING>"]" { 225 DPRINT("/BYTESTRING\n"); 226 BEGIN_DEFAULT(); 227 return ']'; 228 } 229 230 <PROPNODENAME>\\?{PROPNODECHAR}+ { 231 DPRINT("PropNodeName: %s\n", yytext); 232 yylval.propnodename = xstrdup((yytext[0] == '\\') ? 233 yytext + 1 : yytext); 234 BEGIN_DEFAULT(); 235 return DT_PROPNODENAME; 236 } 237 238 "/incbin/" { 239 DPRINT("Binary Include\n"); 240 return DT_INCBIN; 241 } 242 243 <*>{WS}+ /* eat whitespace */ 244 <*>{COMMENT}+ /* eat C-style comments */ 245 <*>{LINECOMMENT}+ /* eat C++-style comments */ 246 247 <*>"<<" { return DT_LSHIFT; }; 248 <*>">>" { return DT_RSHIFT; }; 249 <*>"<=" { return DT_LE; }; 250 <*>">=" { return DT_GE; }; 251 <*>"==" { return DT_EQ; }; 252 <*>"!=" { return DT_NE; }; 253 <*>"&&" { return DT_AND; }; 254 <*>"||" { return DT_OR; }; 255 256 <*>. { 257 DPRINT("Char: %c (\\x%02x)\n", yytext[0], 258 (unsigned)yytext[0]); 259 if (yytext[0] == '[') { 260 DPRINT("<BYTESTRING>\n"); 261 BEGIN(BYTESTRING); 262 } 263 if ((yytext[0] == '{') 264 || (yytext[0] == ';')) { 265 DPRINT("<PROPNODENAME>\n"); 266 BEGIN(PROPNODENAME); 267 } 268 return yytext[0]; 269 } 270 271 %% 272 273 static void push_input_file(const char *filename) 274 { 275 assert(filename); 276 277 srcfile_push(filename); 278 279 yyin = current_srcfile->f; 280 281 yypush_buffer_state(yy_create_buffer(yyin, YY_BUF_SIZE)); 282 } 283 284 285 static bool pop_input_file(void) 286 { 287 if (srcfile_pop() == 0) 288 return false; 289 290 yypop_buffer_state(); 291 yyin = current_srcfile->f; 292 293 return true; 294 } 295 296 static void lexical_error(const char *fmt, ...) 297 { 298 va_list ap; 299 300 va_start(ap, fmt); 301 srcpos_verror(&yylloc, "Lexical error", fmt, ap); 302 va_end(ap); 303 304 treesource_error = true; 305 } 306
