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835 lines
20 KiB
835 lines
20 KiB
/*
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* Aic7xxx SCSI host adapter firmware asssembler
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*
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* Copyright (c) 1997, 1998, 2000, 2001 Justin T. Gibbs.
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* Copyright (c) 2001, 2002 Adaptec Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*
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* $Id: //depot/aic7xxx/aic7xxx/aicasm/aicasm.c#22 $
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*
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* $FreeBSD$
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*/
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <ctype.h>
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#include <inttypes.h>
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#include <regex.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sysexits.h>
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#include <unistd.h>
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#if linux
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#include <endian.h>
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#else
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#include <machine/endian.h>
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#endif
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#include "aicasm.h"
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#include "aicasm_symbol.h"
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#include "aicasm_insformat.h"
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typedef struct patch {
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STAILQ_ENTRY(patch) links;
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int patch_func;
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u_int begin;
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u_int skip_instr;
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u_int skip_patch;
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} patch_t;
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STAILQ_HEAD(patch_list, patch) patches;
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static void usage(void);
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static void back_patch(void);
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static void output_code(void);
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static void output_listing(char *ifilename);
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static void dump_scope(scope_t *scope);
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static void emit_patch(scope_t *scope, int patch);
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static int check_patch(patch_t **start_patch, int start_instr,
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int *skip_addr, int *func_vals);
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struct path_list search_path;
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int includes_search_curdir;
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char *appname;
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char *stock_include_file;
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FILE *ofile;
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char *ofilename;
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char *regfilename;
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FILE *regfile;
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char *listfilename;
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FILE *listfile;
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char *regdiagfilename;
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FILE *regdiagfile;
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int src_mode;
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int dst_mode;
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|
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static STAILQ_HEAD(,instruction) seq_program;
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struct cs_tailq cs_tailq;
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struct scope_list scope_stack;
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symlist_t patch_functions;
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#if DEBUG
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extern int yy_flex_debug;
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extern int mm_flex_debug;
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extern int yydebug;
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extern int mmdebug;
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#endif
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extern FILE *yyin;
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extern int yyparse(void);
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int main(int argc, char *argv[]);
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int
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main(int argc, char *argv[])
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{
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extern char *optarg;
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extern int optind;
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int ch;
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int retval;
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char *inputfilename;
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scope_t *sentinal;
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STAILQ_INIT(&patches);
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SLIST_INIT(&search_path);
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STAILQ_INIT(&seq_program);
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TAILQ_INIT(&cs_tailq);
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SLIST_INIT(&scope_stack);
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/* Set Sentinal scope node */
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sentinal = scope_alloc();
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sentinal->type = SCOPE_ROOT;
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includes_search_curdir = 1;
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appname = *argv;
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regfile = NULL;
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listfile = NULL;
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#if DEBUG
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yy_flex_debug = 0;
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mm_flex_debug = 0;
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yydebug = 0;
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mmdebug = 0;
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#endif
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while ((ch = getopt(argc, argv, "d:i:l:n:o:p:r:I:")) != -1) {
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switch(ch) {
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case 'd':
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#if DEBUG
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if (strcmp(optarg, "s") == 0) {
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yy_flex_debug = 1;
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mm_flex_debug = 1;
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} else if (strcmp(optarg, "p") == 0) {
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yydebug = 1;
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mmdebug = 1;
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} else {
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fprintf(stderr, "%s: -d Requires either an "
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"'s' or 'p' argument\n", appname);
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usage();
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}
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#else
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stop("-d: Assembler not built with debugging "
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"information", EX_SOFTWARE);
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#endif
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break;
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case 'i':
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stock_include_file = optarg;
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break;
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case 'l':
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/* Create a program listing */
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if ((listfile = fopen(optarg, "w")) == NULL) {
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perror(optarg);
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stop(NULL, EX_CANTCREAT);
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}
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listfilename = optarg;
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break;
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case 'n':
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/* Don't complain about the -nostdinc directrive */
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if (strcmp(optarg, "ostdinc")) {
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fprintf(stderr, "%s: Unknown option -%c%s\n",
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appname, ch, optarg);
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usage();
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/* NOTREACHED */
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}
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break;
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case 'o':
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if ((ofile = fopen(optarg, "w")) == NULL) {
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perror(optarg);
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stop(NULL, EX_CANTCREAT);
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}
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ofilename = optarg;
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break;
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case 'p':
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/* Create Register Diagnostic "printing" Functions */
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if ((regdiagfile = fopen(optarg, "w")) == NULL) {
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perror(optarg);
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stop(NULL, EX_CANTCREAT);
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}
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regdiagfilename = optarg;
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break;
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case 'r':
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if ((regfile = fopen(optarg, "w")) == NULL) {
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perror(optarg);
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stop(NULL, EX_CANTCREAT);
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}
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regfilename = optarg;
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break;
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case 'I':
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{
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path_entry_t include_dir;
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if (strcmp(optarg, "-") == 0) {
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if (includes_search_curdir == 0) {
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fprintf(stderr, "%s: Warning - '-I-' "
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"specified multiple "
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"times\n", appname);
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}
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includes_search_curdir = 0;
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for (include_dir = SLIST_FIRST(&search_path);
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include_dir != NULL;
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include_dir = SLIST_NEXT(include_dir,
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links))
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/*
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* All entries before a '-I-' only
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* apply to includes specified with
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* quotes instead of "<>".
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*/
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include_dir->quoted_includes_only = 1;
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} else {
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include_dir =
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(path_entry_t)malloc(sizeof(*include_dir));
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if (include_dir == NULL) {
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perror(optarg);
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stop(NULL, EX_OSERR);
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|
}
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include_dir->directory = strdup(optarg);
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if (include_dir->directory == NULL) {
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perror(optarg);
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stop(NULL, EX_OSERR);
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}
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include_dir->quoted_includes_only = 0;
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SLIST_INSERT_HEAD(&search_path, include_dir,
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links);
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}
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break;
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}
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case '?':
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default:
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usage();
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/* NOTREACHED */
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}
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}
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argc -= optind;
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argv += optind;
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if (argc != 1) {
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fprintf(stderr, "%s: No input file specifiled\n", appname);
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usage();
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/* NOTREACHED */
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}
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if (regdiagfile != NULL
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&& (regfile == NULL || stock_include_file == NULL)) {
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fprintf(stderr,
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"%s: The -p option requires the -r and -i options.\n",
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appname);
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usage();
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/* NOTREACHED */
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}
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symtable_open();
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inputfilename = *argv;
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include_file(*argv, SOURCE_FILE);
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retval = yyparse();
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if (retval == 0) {
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if (SLIST_FIRST(&scope_stack) == NULL
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|| SLIST_FIRST(&scope_stack)->type != SCOPE_ROOT) {
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stop("Unterminated conditional expression", EX_DATAERR);
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/* NOTREACHED */
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}
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/* Process outmost scope */
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process_scope(SLIST_FIRST(&scope_stack));
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/*
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* Decend the tree of scopes and insert/emit
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* patches as appropriate. We perform a depth first
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* tranversal, recursively handling each scope.
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*/
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/* start at the root scope */
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dump_scope(SLIST_FIRST(&scope_stack));
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|
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/* Patch up forward jump addresses */
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back_patch();
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if (ofile != NULL)
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output_code();
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if (regfile != NULL)
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symtable_dump(regfile, regdiagfile);
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if (listfile != NULL)
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output_listing(inputfilename);
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}
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stop(NULL, 0);
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/* NOTREACHED */
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return (0);
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}
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|
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static void
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usage()
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{
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|
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|
(void)fprintf(stderr,
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"usage: %-16s [-nostdinc] [-I-] [-I directory] [-o output_file]\n"
|
|
" [-r register_output_file [-p register_diag_file -i includefile]]\n"
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" [-l program_list_file]\n"
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" input_file\n", appname);
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exit(EX_USAGE);
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}
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|
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static void
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back_patch()
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{
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struct instruction *cur_instr;
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|
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for (cur_instr = STAILQ_FIRST(&seq_program);
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cur_instr != NULL;
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cur_instr = STAILQ_NEXT(cur_instr, links)) {
|
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if (cur_instr->patch_label != NULL) {
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|
struct ins_format3 *f3_instr;
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u_int address;
|
|
|
|
if (cur_instr->patch_label->type != LABEL) {
|
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char buf[255];
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|
|
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snprintf(buf, sizeof(buf),
|
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"Undefined label %s",
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cur_instr->patch_label->name);
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stop(buf, EX_DATAERR);
|
|
/* NOTREACHED */
|
|
}
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|
f3_instr = &cur_instr->format.format3;
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|
address = f3_instr->address;
|
|
address += cur_instr->patch_label->info.linfo->address;
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f3_instr->address = address;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
output_code()
|
|
{
|
|
struct instruction *cur_instr;
|
|
patch_t *cur_patch;
|
|
critical_section_t *cs;
|
|
symbol_node_t *cur_node;
|
|
int instrcount;
|
|
|
|
instrcount = 0;
|
|
fprintf(ofile,
|
|
"/*\n"
|
|
" * DO NOT EDIT - This file is automatically generated\n"
|
|
" * from the following source files:\n"
|
|
" *\n"
|
|
"%s */\n", versions);
|
|
|
|
fprintf(ofile, "static uint8_t seqprog[] = {\n");
|
|
for (cur_instr = STAILQ_FIRST(&seq_program);
|
|
cur_instr != NULL;
|
|
cur_instr = STAILQ_NEXT(cur_instr, links)) {
|
|
|
|
fprintf(ofile, "%s\t0x%02x, 0x%02x, 0x%02x, 0x%02x",
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cur_instr == STAILQ_FIRST(&seq_program) ? "" : ",\n",
|
|
#ifdef __LITTLE_ENDIAN
|
|
cur_instr->format.bytes[0],
|
|
cur_instr->format.bytes[1],
|
|
cur_instr->format.bytes[2],
|
|
cur_instr->format.bytes[3]);
|
|
#else
|
|
cur_instr->format.bytes[3],
|
|
cur_instr->format.bytes[2],
|
|
cur_instr->format.bytes[1],
|
|
cur_instr->format.bytes[0]);
|
|
#endif
|
|
instrcount++;
|
|
}
|
|
fprintf(ofile, "\n};\n\n");
|
|
|
|
if (patch_arg_list == NULL)
|
|
stop("Patch argument list not defined",
|
|
EX_DATAERR);
|
|
|
|
/*
|
|
* Output patch information. Patch functions first.
|
|
*/
|
|
fprintf(ofile,
|
|
"typedef int %spatch_func_t (%s);\n", prefix, patch_arg_list);
|
|
|
|
for (cur_node = SLIST_FIRST(&patch_functions);
|
|
cur_node != NULL;
|
|
cur_node = SLIST_NEXT(cur_node,links)) {
|
|
fprintf(ofile,
|
|
"static %spatch_func_t %spatch%d_func;\n"
|
|
"\n"
|
|
"static int\n"
|
|
"%spatch%d_func(%s)\n"
|
|
"{\n"
|
|
" return (%s);\n"
|
|
"}\n\n",
|
|
prefix,
|
|
prefix,
|
|
cur_node->symbol->info.condinfo->func_num,
|
|
prefix,
|
|
cur_node->symbol->info.condinfo->func_num,
|
|
patch_arg_list,
|
|
cur_node->symbol->name);
|
|
}
|
|
|
|
fprintf(ofile,
|
|
"static struct patch {\n"
|
|
" %spatch_func_t *patch_func;\n"
|
|
" uint32_t begin :10,\n"
|
|
" skip_instr :10,\n"
|
|
" skip_patch :12;\n"
|
|
"} patches[] = {\n", prefix);
|
|
|
|
for (cur_patch = STAILQ_FIRST(&patches);
|
|
cur_patch != NULL;
|
|
cur_patch = STAILQ_NEXT(cur_patch,links)) {
|
|
fprintf(ofile, "%s\t{ %spatch%d_func, %d, %d, %d }",
|
|
cur_patch == STAILQ_FIRST(&patches) ? "" : ",\n",
|
|
prefix,
|
|
cur_patch->patch_func, cur_patch->begin,
|
|
cur_patch->skip_instr, cur_patch->skip_patch);
|
|
}
|
|
|
|
fprintf(ofile, "\n};\n\n");
|
|
|
|
fprintf(ofile,
|
|
"static struct cs {\n"
|
|
" uint16_t begin;\n"
|
|
" uint16_t end;\n"
|
|
"} critical_sections[] = {\n");
|
|
|
|
for (cs = TAILQ_FIRST(&cs_tailq);
|
|
cs != NULL;
|
|
cs = TAILQ_NEXT(cs, links)) {
|
|
fprintf(ofile, "%s\t{ %d, %d }",
|
|
cs == TAILQ_FIRST(&cs_tailq) ? "" : ",\n",
|
|
cs->begin_addr, cs->end_addr);
|
|
}
|
|
|
|
fprintf(ofile, "\n};\n\n");
|
|
|
|
fprintf(ofile,
|
|
"static const int num_critical_sections = sizeof(critical_sections)\n"
|
|
" / sizeof(*critical_sections);\n");
|
|
|
|
fprintf(stderr, "%s: %d instructions used\n", appname, instrcount);
|
|
}
|
|
|
|
static void
|
|
dump_scope(scope_t *scope)
|
|
{
|
|
scope_t *cur_scope;
|
|
|
|
/*
|
|
* Emit the first patch for this scope
|
|
*/
|
|
emit_patch(scope, 0);
|
|
|
|
/*
|
|
* Dump each scope within this one.
|
|
*/
|
|
cur_scope = TAILQ_FIRST(&scope->inner_scope);
|
|
|
|
while (cur_scope != NULL) {
|
|
|
|
dump_scope(cur_scope);
|
|
|
|
cur_scope = TAILQ_NEXT(cur_scope, scope_links);
|
|
}
|
|
|
|
/*
|
|
* Emit the second, closing, patch for this scope
|
|
*/
|
|
emit_patch(scope, 1);
|
|
}
|
|
|
|
void
|
|
emit_patch(scope_t *scope, int patch)
|
|
{
|
|
patch_info_t *pinfo;
|
|
patch_t *new_patch;
|
|
|
|
pinfo = &scope->patches[patch];
|
|
|
|
if (pinfo->skip_instr == 0)
|
|
/* No-Op patch */
|
|
return;
|
|
|
|
new_patch = (patch_t *)malloc(sizeof(*new_patch));
|
|
|
|
if (new_patch == NULL)
|
|
stop("Could not malloc patch structure", EX_OSERR);
|
|
|
|
memset(new_patch, 0, sizeof(*new_patch));
|
|
|
|
if (patch == 0) {
|
|
new_patch->patch_func = scope->func_num;
|
|
new_patch->begin = scope->begin_addr;
|
|
} else {
|
|
new_patch->patch_func = 0;
|
|
new_patch->begin = scope->end_addr;
|
|
}
|
|
new_patch->skip_instr = pinfo->skip_instr;
|
|
new_patch->skip_patch = pinfo->skip_patch;
|
|
STAILQ_INSERT_TAIL(&patches, new_patch, links);
|
|
}
|
|
|
|
void
|
|
output_listing(char *ifilename)
|
|
{
|
|
char buf[1024];
|
|
FILE *ifile;
|
|
struct instruction *cur_instr;
|
|
patch_t *cur_patch;
|
|
symbol_node_t *cur_func;
|
|
int *func_values;
|
|
int instrcount;
|
|
int instrptr;
|
|
int line;
|
|
int func_count;
|
|
int skip_addr;
|
|
|
|
instrcount = 0;
|
|
instrptr = 0;
|
|
line = 1;
|
|
skip_addr = 0;
|
|
if ((ifile = fopen(ifilename, "r")) == NULL) {
|
|
perror(ifilename);
|
|
stop(NULL, EX_DATAERR);
|
|
}
|
|
|
|
/*
|
|
* Determine which options to apply to this listing.
|
|
*/
|
|
for (func_count = 0, cur_func = SLIST_FIRST(&patch_functions);
|
|
cur_func != NULL;
|
|
cur_func = SLIST_NEXT(cur_func, links))
|
|
func_count++;
|
|
|
|
func_values = NULL;
|
|
if (func_count != 0) {
|
|
func_values = (int *)malloc(func_count * sizeof(int));
|
|
|
|
if (func_values == NULL)
|
|
stop("Could not malloc", EX_OSERR);
|
|
|
|
func_values[0] = 0; /* FALSE func */
|
|
func_count--;
|
|
|
|
/*
|
|
* Ask the user to fill in the return values for
|
|
* the rest of the functions.
|
|
*/
|
|
|
|
|
|
for (cur_func = SLIST_FIRST(&patch_functions);
|
|
cur_func != NULL && SLIST_NEXT(cur_func, links) != NULL;
|
|
cur_func = SLIST_NEXT(cur_func, links), func_count--) {
|
|
int input;
|
|
|
|
fprintf(stdout, "\n(%s)\n", cur_func->symbol->name);
|
|
fprintf(stdout,
|
|
"Enter the return value for "
|
|
"this expression[T/F]:");
|
|
|
|
while (1) {
|
|
|
|
input = getchar();
|
|
input = toupper(input);
|
|
|
|
if (input == 'T') {
|
|
func_values[func_count] = 1;
|
|
break;
|
|
} else if (input == 'F') {
|
|
func_values[func_count] = 0;
|
|
break;
|
|
}
|
|
}
|
|
if (isatty(fileno(stdin)) == 0)
|
|
putchar(input);
|
|
}
|
|
fprintf(stdout, "\nThanks!\n");
|
|
}
|
|
|
|
/* Now output the listing */
|
|
cur_patch = STAILQ_FIRST(&patches);
|
|
for (cur_instr = STAILQ_FIRST(&seq_program);
|
|
cur_instr != NULL;
|
|
cur_instr = STAILQ_NEXT(cur_instr, links), instrcount++) {
|
|
|
|
if (check_patch(&cur_patch, instrcount,
|
|
&skip_addr, func_values) == 0) {
|
|
/* Don't count this instruction as it is in a patch
|
|
* that was removed.
|
|
*/
|
|
continue;
|
|
}
|
|
|
|
while (line < cur_instr->srcline) {
|
|
fgets(buf, sizeof(buf), ifile);
|
|
fprintf(listfile, "\t\t%s", buf);
|
|
line++;
|
|
}
|
|
fprintf(listfile, "%03x %02x%02x%02x%02x", instrptr,
|
|
#ifdef __LITTLE_ENDIAN
|
|
cur_instr->format.bytes[0],
|
|
cur_instr->format.bytes[1],
|
|
cur_instr->format.bytes[2],
|
|
cur_instr->format.bytes[3]);
|
|
#else
|
|
cur_instr->format.bytes[3],
|
|
cur_instr->format.bytes[2],
|
|
cur_instr->format.bytes[1],
|
|
cur_instr->format.bytes[0]);
|
|
#endif
|
|
fgets(buf, sizeof(buf), ifile);
|
|
fprintf(listfile, "\t%s", buf);
|
|
line++;
|
|
instrptr++;
|
|
}
|
|
/* Dump the remainder of the file */
|
|
while(fgets(buf, sizeof(buf), ifile) != NULL)
|
|
fprintf(listfile, "\t\t%s", buf);
|
|
|
|
fclose(ifile);
|
|
}
|
|
|
|
static int
|
|
check_patch(patch_t **start_patch, int start_instr,
|
|
int *skip_addr, int *func_vals)
|
|
{
|
|
patch_t *cur_patch;
|
|
|
|
cur_patch = *start_patch;
|
|
|
|
while (cur_patch != NULL && start_instr == cur_patch->begin) {
|
|
if (func_vals[cur_patch->patch_func] == 0) {
|
|
int skip;
|
|
|
|
/* Start rejecting code */
|
|
*skip_addr = start_instr + cur_patch->skip_instr;
|
|
for (skip = cur_patch->skip_patch;
|
|
skip > 0 && cur_patch != NULL;
|
|
skip--)
|
|
cur_patch = STAILQ_NEXT(cur_patch, links);
|
|
} else {
|
|
/* Accepted this patch. Advance to the next
|
|
* one and wait for our intruction pointer to
|
|
* hit this point.
|
|
*/
|
|
cur_patch = STAILQ_NEXT(cur_patch, links);
|
|
}
|
|
}
|
|
|
|
*start_patch = cur_patch;
|
|
if (start_instr < *skip_addr)
|
|
/* Still skipping */
|
|
return (0);
|
|
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Print out error information if appropriate, and clean up before
|
|
* terminating the program.
|
|
*/
|
|
void
|
|
stop(const char *string, int err_code)
|
|
{
|
|
if (string != NULL) {
|
|
fprintf(stderr, "%s: ", appname);
|
|
if (yyfilename != NULL) {
|
|
fprintf(stderr, "Stopped at file %s, line %d - ",
|
|
yyfilename, yylineno);
|
|
}
|
|
fprintf(stderr, "%s\n", string);
|
|
}
|
|
|
|
if (ofile != NULL) {
|
|
fclose(ofile);
|
|
if (err_code != 0) {
|
|
fprintf(stderr, "%s: Removing %s due to error\n",
|
|
appname, ofilename);
|
|
unlink(ofilename);
|
|
}
|
|
}
|
|
|
|
if (regfile != NULL) {
|
|
fclose(regfile);
|
|
if (err_code != 0) {
|
|
fprintf(stderr, "%s: Removing %s due to error\n",
|
|
appname, regfilename);
|
|
unlink(regfilename);
|
|
}
|
|
}
|
|
|
|
if (listfile != NULL) {
|
|
fclose(listfile);
|
|
if (err_code != 0) {
|
|
fprintf(stderr, "%s: Removing %s due to error\n",
|
|
appname, listfilename);
|
|
unlink(listfilename);
|
|
}
|
|
}
|
|
|
|
symlist_free(&patch_functions);
|
|
symtable_close();
|
|
|
|
exit(err_code);
|
|
}
|
|
|
|
struct instruction *
|
|
seq_alloc()
|
|
{
|
|
struct instruction *new_instr;
|
|
|
|
new_instr = (struct instruction *)malloc(sizeof(struct instruction));
|
|
if (new_instr == NULL)
|
|
stop("Unable to malloc instruction object", EX_SOFTWARE);
|
|
memset(new_instr, 0, sizeof(*new_instr));
|
|
STAILQ_INSERT_TAIL(&seq_program, new_instr, links);
|
|
new_instr->srcline = yylineno;
|
|
return new_instr;
|
|
}
|
|
|
|
critical_section_t *
|
|
cs_alloc()
|
|
{
|
|
critical_section_t *new_cs;
|
|
|
|
new_cs= (critical_section_t *)malloc(sizeof(critical_section_t));
|
|
if (new_cs == NULL)
|
|
stop("Unable to malloc critical_section object", EX_SOFTWARE);
|
|
memset(new_cs, 0, sizeof(*new_cs));
|
|
|
|
TAILQ_INSERT_TAIL(&cs_tailq, new_cs, links);
|
|
return new_cs;
|
|
}
|
|
|
|
scope_t *
|
|
scope_alloc()
|
|
{
|
|
scope_t *new_scope;
|
|
|
|
new_scope = (scope_t *)malloc(sizeof(scope_t));
|
|
if (new_scope == NULL)
|
|
stop("Unable to malloc scope object", EX_SOFTWARE);
|
|
memset(new_scope, 0, sizeof(*new_scope));
|
|
TAILQ_INIT(&new_scope->inner_scope);
|
|
|
|
if (SLIST_FIRST(&scope_stack) != NULL) {
|
|
TAILQ_INSERT_TAIL(&SLIST_FIRST(&scope_stack)->inner_scope,
|
|
new_scope, scope_links);
|
|
}
|
|
/* This patch is now the current scope */
|
|
SLIST_INSERT_HEAD(&scope_stack, new_scope, scope_stack_links);
|
|
return new_scope;
|
|
}
|
|
|
|
void
|
|
process_scope(scope_t *scope)
|
|
{
|
|
/*
|
|
* We are "leaving" this scope. We should now have
|
|
* enough information to process the lists of scopes
|
|
* we encapsulate.
|
|
*/
|
|
scope_t *cur_scope;
|
|
u_int skip_patch_count;
|
|
u_int skip_instr_count;
|
|
|
|
cur_scope = TAILQ_LAST(&scope->inner_scope, scope_tailq);
|
|
skip_patch_count = 0;
|
|
skip_instr_count = 0;
|
|
while (cur_scope != NULL) {
|
|
u_int patch0_patch_skip;
|
|
|
|
patch0_patch_skip = 0;
|
|
switch (cur_scope->type) {
|
|
case SCOPE_IF:
|
|
case SCOPE_ELSE_IF:
|
|
if (skip_instr_count != 0) {
|
|
/* Create a tail patch */
|
|
patch0_patch_skip++;
|
|
cur_scope->patches[1].skip_patch =
|
|
skip_patch_count + 1;
|
|
cur_scope->patches[1].skip_instr =
|
|
skip_instr_count;
|
|
}
|
|
|
|
/* Count Head patch */
|
|
patch0_patch_skip++;
|
|
|
|
/* Count any patches contained in our inner scope */
|
|
patch0_patch_skip += cur_scope->inner_scope_patches;
|
|
|
|
cur_scope->patches[0].skip_patch = patch0_patch_skip;
|
|
cur_scope->patches[0].skip_instr =
|
|
cur_scope->end_addr - cur_scope->begin_addr;
|
|
|
|
skip_instr_count += cur_scope->patches[0].skip_instr;
|
|
|
|
skip_patch_count += patch0_patch_skip;
|
|
if (cur_scope->type == SCOPE_IF) {
|
|
scope->inner_scope_patches += skip_patch_count;
|
|
skip_patch_count = 0;
|
|
skip_instr_count = 0;
|
|
}
|
|
break;
|
|
case SCOPE_ELSE:
|
|
/* Count any patches contained in our innter scope */
|
|
skip_patch_count += cur_scope->inner_scope_patches;
|
|
|
|
skip_instr_count += cur_scope->end_addr
|
|
- cur_scope->begin_addr;
|
|
break;
|
|
case SCOPE_ROOT:
|
|
stop("Unexpected scope type encountered", EX_SOFTWARE);
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
cur_scope = TAILQ_PREV(cur_scope, scope_tailq, scope_links);
|
|
}
|
|
}
|
|
|