1 %{ 2 /* 3 * Lexical Analyzer for the Aic7xxx SCSI Host adapter sequencer assembler. 4 * 5 * Copyright (c) 1997-1998 Justin T. Gibbs. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions, and the following disclaimer, 13 * without modification. 14 * 2. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: src/sys/dev/aic7xxx/aicasm_scan.l,v 1.8 1999/12/06 18:23:30 gibbs Exp $ 30 */ 31 32 #include <sys/types.h> 33 34 #include <limits.h> 35 #include <stdio.h> 36 #include <string.h> 37 #include <sysexits.h> 38 #include <sys/queue.h> 39 40 #include "aicasm.h" 41 #include "aicasm_symbol.h" 42 #include "y.tab.h" 43 44 #define MAX_STR_CONST 256 45 char string_buf[MAX_STR_CONST]; 46 char *string_buf_ptr; 47 int parren_count; 48 %} 49 50 PATH [-/A-Za-z0-9_.]*[./][-/A-Za-z0-9_.]* 51 WORD [A-Za-z_][-A-Za-z_0-9]* 52 SPACE [ \t]+ 53 54 %x COMMENT 55 %x CEXPR 56 %x INCLUDE 57 58 %% 59 \n { ++yylineno; } 60 "/*" { BEGIN COMMENT; /* Enter comment eating state */ } 61 <COMMENT>"/*" { fprintf(stderr, "Warning! Comment within comment."); } 62 <COMMENT>\n { ++yylineno; } 63 <COMMENT>[^*/\n]* ; 64 <COMMENT>"*"+[^*/\n]* ; 65 <COMMENT>"/"+[^*/\n]* ; 66 <COMMENT>"*"+"/" { BEGIN INITIAL; } 67 if[ \t]*\( { 68 string_buf_ptr = string_buf; 69 parren_count = 1; 70 BEGIN CEXPR; 71 return T_IF; 72 } 73 <CEXPR>\( { *string_buf_ptr++ = '('; parren_count++; } 74 <CEXPR>\) { 75 parren_count--; 76 if (parren_count == 0) { 77 /* All done */ 78 BEGIN INITIAL; 79 *string_buf_ptr = '\0'; 80 yylval.sym = symtable_get(string_buf); 81 return T_CEXPR; 82 } else { 83 *string_buf_ptr++ = ')'; 84 } 85 } 86 <CEXPR>\n { ++yylineno; } 87 <CEXPR>[^()\n]+ { 88 char *yptr = yytext; 89 90 while (*yptr != '\0') 91 *string_buf_ptr++ = *yptr++; 92 } 93 94 {SPACE} ; 95 96 /* Register/SCB/SRAM definition keywords */ 97 register { return T_REGISTER; } 98 const { yylval.value = FALSE; return T_CONST; } 99 download { return T_DOWNLOAD; } 100 address { return T_ADDRESS; } 101 access_mode { return T_ACCESS_MODE; } 102 RW|RO|WO { 103 if (strcmp(yytext, "RW") == 0) 104 yylval.value = RW; 105 else if (strcmp(yytext, "RO") == 0) 106 yylval.value = RO; 107 else 108 yylval.value = WO; 109 return T_MODE; 110 } 111 bit { return T_BIT; } 112 mask { return T_MASK; } 113 alias { return T_ALIAS; } 114 size { return T_SIZE; } 115 scb { return T_SCB; } 116 scratch_ram { return T_SRAM; } 117 accumulator { return T_ACCUM; } 118 allones { return T_ALLONES; } 119 allzeros { return T_ALLZEROS; } 120 none { return T_NONE; } 121 sindex { return T_SINDEX; } 122 A { return T_A; } 123 124 /* Opcodes */ 125 shl { return T_SHL; } 126 shr { return T_SHR; } 127 ror { return T_ROR; } 128 rol { return T_ROL; } 129 mvi { return T_MVI; } 130 mov { return T_MOV; } 131 clr { return T_CLR; } 132 jmp { return T_JMP; } 133 jc { return T_JC; } 134 jnc { return T_JNC; } 135 je { return T_JE; } 136 jne { return T_JNE; } 137 jz { return T_JZ; } 138 jnz { return T_JNZ; } 139 call { return T_CALL; } 140 add { return T_ADD; } 141 adc { return T_ADC; } 142 bmov { return T_BMOV; } 143 inc { return T_INC; } 144 dec { return T_DEC; } 145 stc { return T_STC; } 146 clc { return T_CLC; } 147 cmp { return T_CMP; } 148 xor { return T_XOR; } 149 test { return T_TEST;} 150 and { return T_AND; } 151 or { return T_OR; } 152 ret { return T_RET; } 153 nop { return T_NOP; } 154 else { return T_ELSE; } 155 156 /* Allowed Symbols */ 157 [-+,:()~|&."{};<>[\]!] { return yytext[0]; } 158 159 /* Number processing */ 160 0[0-7]* { 161 yylval.value = strtol(yytext, NULL, 8); 162 return T_NUMBER; 163 } 164 165 0[xX][0-9a-fA-F]+ { 166 yylval.value = strtoul(yytext + 2, NULL, 16); 167 return T_NUMBER; 168 } 169 170 [1-9][0-9]* { 171 yylval.value = strtol(yytext, NULL, 10); 172 return T_NUMBER; 173 } 174 175 /* Include Files */ 176 #include { return T_INCLUDE; BEGIN INCLUDE;} 177 <INCLUDE>[<>\"] { return yytext[0]; } 178 <INCLUDE>{PATH} { yylval.str = strdup(yytext); return T_PATH; } 179 <INCLUDE>; { BEGIN INITIAL; return yytext[0]; } 180 <INCLUDE>. { stop("Invalid include line", EX_DATAERR); } 181 182 /* For parsing C include files with #define foo */ 183 #define { yylval.value = TRUE; return T_CONST; } 184 /* Throw away macros */ 185 #define[^\n]*[()]+[^\n]* ; 186 {PATH} { yylval.str = strdup(yytext); return T_PATH; } 187 188 {WORD} { yylval.sym = symtable_get(yytext); return T_SYMBOL; } 189 190 . { 191 char buf[255]; 192 193 snprintf(buf, sizeof(buf), "Invalid character " 194 "'%c'", yytext[0]); 195 stop(buf, EX_DATAERR); 196 } 197 %% 198 199 typedef struct include { 200 YY_BUFFER_STATE buffer; 201 int lineno; 202 char *filename; 203 SLIST_ENTRY(include) links; 204 }include_t; 205 206 SLIST_HEAD(, include) include_stack; 207 208 void 209 include_file(file_name, type) 210 char *file_name; 211 include_type type; 212 { 213 FILE *newfile; 214 include_t *include; 215 216 newfile = NULL; 217 /* Try the current directory first */ 218 if (includes_search_curdir != 0 || type == SOURCE_FILE) 219 newfile = fopen(file_name, "r"); 220 221 if (newfile == NULL && type != SOURCE_FILE) { 222 path_entry_t include_dir; 223 for (include_dir = search_path.slh_first; 224 include_dir != NULL; 225 include_dir = include_dir->links.sle_next) { 226 char fullname[PATH_MAX]; 227 228 if ((include_dir->quoted_includes_only == TRUE) 229 && (type != QUOTED_INCLUDE)) 230 continue; 231 232 snprintf(fullname, sizeof(fullname), 233 "%s/%s", include_dir->directory, file_name); 234 235 if ((newfile = fopen(fullname, "r")) != NULL) 236 break; 237 } 238 } 239 240 if (newfile == NULL) { 241 perror(file_name); 242 stop("Unable to open input file", EX_SOFTWARE); 243 /* NOTREACHED */ 244 } 245 246 if (type != SOURCE_FILE) { 247 include = (include_t *)malloc(sizeof(include_t)); 248 if (include == NULL) { 249 stop("Unable to allocate include stack entry", 250 EX_SOFTWARE); 251 /* NOTREACHED */ 252 } 253 include->buffer = YY_CURRENT_BUFFER; 254 include->lineno = yylineno; 255 include->filename = yyfilename; 256 SLIST_INSERT_HEAD(&include_stack, include, links); 257 } 258 yy_switch_to_buffer(yy_create_buffer(newfile, YY_BUF_SIZE)); 259 yylineno = 1; 260 yyfilename = strdup(file_name); 261 } 262 263 int 264 yywrap() 265 { 266 include_t *include; 267 268 yy_delete_buffer(YY_CURRENT_BUFFER); 269 (void)fclose(yyin); 270 if (yyfilename != NULL) 271 free(yyfilename); 272 yyfilename = NULL; 273 include = include_stack.slh_first; 274 if (include != NULL) { 275 yy_switch_to_buffer(include->buffer); 276 yylineno = include->lineno; 277 yyfilename = include->filename; 278 SLIST_REMOVE_HEAD(&include_stack, links); 279 free(include); 280 return (0); 281 } 282 return (1); 283 } 284