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Annotation of sys/dev/microcode/aic7xxx/aicasm_macro_gram.y, Revision 1.1.1.1

1.1       nbrk        1: %{
                      2: /*     $OpenBSD: aicasm_macro_gram.y,v 1.3 2006/12/23 21:08:01 krw Exp $       */
                      3: /*     $NetBSD: aicasm_macro_gram.y,v 1.1 2003/04/19 19:26:11 fvdl Exp $       */
                      4:
                      5: /*
                      6:  * Sub-parser for macro invocation in the Aic7xxx SCSI
                      7:  * Host adapter sequencer assembler.
                      8:  *
                      9:  * Copyright (c) 2001 Adaptec Inc.
                     10:  * All rights reserved.
                     11:  *
                     12:  * Redistribution and use in source and binary forms, with or without
                     13:  * modification, are permitted provided that the following conditions
                     14:  * are met:
                     15:  * 1. Redistributions of source code must retain the above copyright
                     16:  *    notice, this list of conditions, and the following disclaimer,
                     17:  *    without modification.
                     18:  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
                     19:  *    substantially similar to the "NO WARRANTY" disclaimer below
                     20:  *    ("Disclaimer") and any redistribution must be conditioned upon
                     21:  *    including a substantially similar Disclaimer requirement for further
                     22:  *    binary redistribution.
                     23:  * 3. Neither the names of the above-listed copyright holders nor the names
                     24:  *    of any contributors may be used to endorse or promote products derived
                     25:  *    from this software without specific prior written permission.
                     26:  *
                     27:  * Alternatively, this software may be distributed under the terms of the
                     28:  * GNU General Public License ("GPL") version 2 as published by the Free
                     29:  * Software Foundation.
                     30:  *
                     31:  * NO WARRANTY
                     32:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
                     33:  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
                     34:  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
                     35:  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
                     36:  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     37:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     38:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     39:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
                     40:  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
                     41:  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
                     42:  * POSSIBILITY OF SUCH DAMAGES.
                     43:  *
                     44:  * $FreeBSD: src/sys/dev/aic7xxx/aicasm/aicasm_macro_gram.y,v 1.2 2002/08/31 06:39:40 gibbs Exp $
                     45:  */
                     46:
                     47: #include <sys/types.h>
                     48:
                     49: #include <inttypes.h>
                     50: #include <regex.h>
                     51: #include <stdio.h>
                     52: #include <stdlib.h>
                     53: #include <string.h>
                     54: #include <sysexits.h>
                     55:
                     56: #ifdef __linux__
                     57: #include "../queue.h"
                     58: #else
                     59: #include <sys/queue.h>
                     60: #endif
                     61:
                     62: #include "aicasm.h"
                     63: #include "aicasm_symbol.h"
                     64: #include "aicasm_insformat.h"
                     65:
                     66: static symbol_t *macro_symbol;
                     67:
                     68: static void add_macro_arg(const char *argtext, int position);
                     69:
                     70: %}
                     71:
                     72: %union {
                     73:        int             value;
                     74:        char            *str;
                     75:        symbol_t        *sym;
                     76: }
                     77:
                     78:
                     79: %token <str> T_ARG
                     80:
                     81: %token <sym> T_SYMBOL
                     82:
                     83: %type <value> macro_arglist
                     84:
                     85: %%
                     86:
                     87: macrocall:
                     88:        T_SYMBOL '('
                     89:        {
                     90:                macro_symbol = $1;
                     91:        }
                     92:        macro_arglist ')'
                     93:        {
                     94:                if (macro_symbol->info.macroinfo->narg != $4) {
                     95:                        printf("Narg == %d", macro_symbol->info.macroinfo->narg);
                     96:                        stop("Too few arguments for macro invocation",
                     97:                             EX_DATAERR);
                     98:                        /* NOTREACHED */
                     99:                }
                    100:                macro_symbol = NULL;
                    101:                YYACCEPT;
                    102:        }
                    103: ;
                    104:
                    105: macro_arglist:
                    106:        {
                    107:                /* Macros can take 0 arguments */
                    108:                $$ = 0;
                    109:        }
                    110: |      T_ARG
                    111:        {
                    112:                $$ = 1;
                    113:                add_macro_arg($1, 1);
                    114:        }
                    115: |      macro_arglist ',' T_ARG
                    116:        {
                    117:                if ($1 == 0) {
                    118:                        stop("Comma without preceding argument in arg list",
                    119:                             EX_DATAERR);
                    120:                        /* NOTREACHED */
                    121:                }
                    122:                $$ = $1 + 1;
                    123:                add_macro_arg($3, $$);
                    124:        }
                    125: ;
                    126:
                    127: %%
                    128:
                    129: static void
                    130: add_macro_arg(const char *argtext, int argnum)
                    131: {
                    132:        struct macro_arg *marg;
                    133:        int i;
                    134:
                    135:        if (macro_symbol == NULL || macro_symbol->type != MACRO) {
                    136:                stop("Invalid current symbol for adding macro arg",
                    137:                     EX_SOFTWARE);
                    138:                /* NOTREACHED */
                    139:        }
                    140:        /*
                    141:         * Macro Invocation.  Find the appropriate argument and fill
                    142:         * in the replace ment text for this call.
                    143:         */
                    144:        i = 0;
                    145:        TAILQ_FOREACH(marg, &macro_symbol->info.macroinfo->args, links) {
                    146:                i++;
                    147:                if (i == argnum)
                    148:                        break;
                    149:        }
                    150:        if (marg == NULL) {
                    151:                stop("Too many arguments for macro invocation", EX_DATAERR);
                    152:                /* NOTREACHED */
                    153:        }
                    154:        marg->replacement_text = strdup(argtext);
                    155:        if (marg->replacement_text == NULL) {
                    156:                stop("Unable to replicate replacement text", EX_SOFTWARE);
                    157:                /* NOTREACHED */
                    158:        }
                    159: }
                    160:
                    161: void
                    162: mmerror(const char *string)
                    163: {
                    164:        stop(string, EX_DATAERR);
                    165: }