drivers/scsi/aic7xxx/aicasm/aicasm.c - android_kernel_lge_hammerhead - Gitiles

 /*
  * Aic7xxx SCSI host adapter firmware asssembler
  *
  * Copyright (c) 1997, 1998, 2000, 2001 Justin T. Gibbs.
  * Copyright (c) 2001, 2002 Adaptec Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions, and the following disclaimer,
  *    without modification.
  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  *    substantially similar to the "NO WARRANTY" disclaimer below
  *    ("Disclaimer") and any redistribution must be conditioned upon
  *    including a substantially similar Disclaimer requirement for further
  *    binary redistribution.
  * 3. Neither the names of the above-listed copyright holders nor the names
  *    of any contributors may be used to endorse or promote products derived
  *    from this software without specific prior written permission.
  *
  * Alternatively, this software may be distributed under the terms of the
  * GNU General Public License ("GPL") version 2 as published by the Free
  * Software Foundation.
  *
  * NO WARRANTY
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGES.
  *
  * $Id: //depot/aic7xxx/aic7xxx/aicasm/aicasm.c#23 $
  *
  * $FreeBSD$
  */
 #include <sys/types.h>
 #include <sys/mman.h>

 #include <ctype.h>
 #include <inttypes.h>
 #include <regex.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sysexits.h>
 #include <unistd.h>

 #if linux
 #include <endian.h>
 #else
 #include <machine/endian.h>
 #endif

 #include "aicasm.h"
 #include "aicasm_symbol.h"
 #include "aicasm_insformat.h"

 typedef struct patch {
 	STAILQ_ENTRY(patch) links;
 	int		patch_func;
 	u_int		begin;
 	u_int		skip_instr;
 	u_int		skip_patch;
 } patch_t;

 STAILQ_HEAD(patch_list, patch) patches;

 static void usage(void);
 static void back_patch(void);
 static void output_code(void);
 static void output_listing(char *ifilename);
 static void dump_scope(scope_t *scope);
 static void emit_patch(scope_t *scope, int patch);
 static int check_patch(patch_t **start_patch, int start_instr,
 		       int *skip_addr, int *func_vals);

 struct path_list search_path;
 int includes_search_curdir;
 char *appname;
 char *stock_include_file;
 FILE *ofile;
 char *ofilename;
 char *regfilename;
 FILE *regfile;
 char *listfilename;
 FILE *listfile;
 char *regdiagfilename;
 FILE *regdiagfile;
 int   src_mode;
 int   dst_mode;

 static STAILQ_HEAD(,instruction) seq_program;
 struct cs_tailq cs_tailq;
 struct scope_list scope_stack;
 symlist_t patch_functions;

 #if DEBUG
 extern int yy_flex_debug;
 extern int mm_flex_debug;
 extern int yydebug;
 extern int mmdebug;
 #endif
 extern FILE *yyin;
 extern int yyparse(void);

 int main(int argc, char *argv[]);

 int
 main(int argc, char *argv[])
 {
 	extern char *optarg;
 	extern int optind;
 	int  ch;
 	int  retval;
 	char *inputfilename;
 	scope_t *sentinal;

 	STAILQ_INIT(&patches);
 	SLIST_INIT(&search_path);
 	STAILQ_INIT(&seq_program);
 	TAILQ_INIT(&cs_tailq);
 	SLIST_INIT(&scope_stack);

 	/* Set Sentinal scope node */
 	sentinal = scope_alloc();
 	sentinal->type = SCOPE_ROOT;

 	includes_search_curdir = 1;
 	appname = *argv;
 	regfile = NULL;
 	listfile = NULL;
 #if DEBUG
 	yy_flex_debug = 0;
 	mm_flex_debug = 0;
 	yydebug = 0;
 	mmdebug = 0;
 #endif
 	while ((ch = getopt(argc, argv, "d:i:l:n:o:p:r:I:")) != -1) {
 		switch(ch) {
 		case 'd':
 #if DEBUG
 			if (strcmp(optarg, "s") == 0) {
 				yy_flex_debug = 1;
 				mm_flex_debug = 1;
 			} else if (strcmp(optarg, "p") == 0) {
 				yydebug = 1;
 				mmdebug = 1;
 			} else {
 				fprintf(stderr, "%s: -d Requires either an "
 					"'s' or 'p' argument\n", appname);
 				usage();
 			}
 #else
 			stop("-d: Assembler not built with debugging "
 			     "information", EX_SOFTWARE);
 #endif
 			break;
 		case 'i':
 			stock_include_file = optarg;
 			break;
 		case 'l':
 			/* Create a program listing */
 			if ((listfile = fopen(optarg, "w")) == NULL) {
 				perror(optarg);
 				stop(NULL, EX_CANTCREAT);
 			}
 			listfilename = optarg;
 			break;
 		case 'n':
 			/* Don't complain about the -nostdinc directrive */
 			if (strcmp(optarg, "ostdinc")) {
 				fprintf(stderr, "%s: Unknown option -%c%s\n",
 					appname, ch, optarg);
 				usage();
 				/* NOTREACHED */
 			}
 			break;
 		case 'o':
 			if ((ofile = fopen(optarg, "w")) == NULL) {
 				perror(optarg);
 				stop(NULL, EX_CANTCREAT);
 			}
 			ofilename = optarg;
 			break;
 		case 'p':
 			/* Create Register Diagnostic "printing" Functions */
 			if ((regdiagfile = fopen(optarg, "w")) == NULL) {
 				perror(optarg);
 				stop(NULL, EX_CANTCREAT);
 			}
 			regdiagfilename = optarg;
 			break;
 		case 'r':
 			if ((regfile = fopen(optarg, "w")) == NULL) {
 				perror(optarg);
 				stop(NULL, EX_CANTCREAT);
 			}
 			regfilename = optarg;
 			break;
 		case 'I':
 		{
 			path_entry_t include_dir;

 			if (strcmp(optarg, "-") == 0) {
 				if (includes_search_curdir == 0) {
 					fprintf(stderr, "%s: Warning - '-I-' "
 							"specified multiple "
 							"times\n", appname);
 				}
 				includes_search_curdir = 0;
 				for (include_dir = SLIST_FIRST(&search_path);
 				     include_dir != NULL;
 				     include_dir = SLIST_NEXT(include_dir,
 							      links))
 					/*
 					 * All entries before a '-I-' only
 					 * apply to includes specified with
 					 * quotes instead of "<>".
 					 */
 					include_dir->quoted_includes_only = 1;
 			} else {
 				include_dir =
 				    (path_entry_t)malloc(sizeof(*include_dir));
 				if (include_dir == NULL) {
 					perror(optarg);
 					stop(NULL, EX_OSERR);
 				}
 				include_dir->directory = strdup(optarg);
 				if (include_dir->directory == NULL) {
 					perror(optarg);
 					stop(NULL, EX_OSERR);
 				}
 				include_dir->quoted_includes_only = 0;
 				SLIST_INSERT_HEAD(&search_path, include_dir,
 						  links);
 			}
 			break;
 		}
 		case '?':
 		default:
 			usage();
 			/* NOTREACHED */
 		}
 	}
 	argc -= optind;
 	argv += optind;

 	if (argc != 1) {
 		fprintf(stderr, "%s: No input file specifiled\n", appname);
 		usage();
 		/* NOTREACHED */
 	}

 	if (regdiagfile != NULL
 	 && (regfile == NULL || stock_include_file == NULL)) {
 		fprintf(stderr,
 			"%s: The -p option requires the -r and -i options.\n",
 			appname);
 		usage();
 		/* NOTREACHED */
 	}
 	symtable_open();
 	inputfilename = *argv;
 	include_file(*argv, SOURCE_FILE);
 	retval = yyparse();
 	if (retval == 0) {
 		if (SLIST_FIRST(&scope_stack) == NULL
 		 || SLIST_FIRST(&scope_stack)->type != SCOPE_ROOT) {
 			stop("Unterminated conditional expression", EX_DATAERR);
 			/* NOTREACHED */
 		}

 		/* Process outmost scope */
 		process_scope(SLIST_FIRST(&scope_stack));
 		/*
 		 * Decend the tree of scopes and insert/emit
 		 * patches as appropriate.  We perform a depth first
 		 * tranversal, recursively handling each scope.
 		 */
 		/* start at the root scope */
 		dump_scope(SLIST_FIRST(&scope_stack));

 		/* Patch up forward jump addresses */
 		back_patch();

 		if (ofile != NULL)
 			output_code();
 		if (regfile != NULL)
 			symtable_dump(regfile, regdiagfile);
 		if (listfile != NULL)
 			output_listing(inputfilename);
 	}

 	stop(NULL, 0);
 	/* NOTREACHED */
 	return (0);
 }

 static void
 usage()
 {

 	(void)fprintf(stderr,
 "usage: %-16s [-nostdinc] [-I-] [-I directory] [-o output_file]\n"
 "	[-r register_output_file [-p register_diag_file -i includefile]]\n"
 "	[-l program_list_file]\n"
 "	input_file\n", appname);
 	exit(EX_USAGE);
 }

 static void
 back_patch()
 {
 	struct instruction *cur_instr;

 	for (cur_instr = STAILQ_FIRST(&seq_program);
 	     cur_instr != NULL;
 	     cur_instr = STAILQ_NEXT(cur_instr, links)) {
 		if (cur_instr->patch_label != NULL) {
 			struct ins_format3 *f3_instr;
 			u_int address;

 			if (cur_instr->patch_label->type != LABEL) {
 				char buf[255];

 				snprintf(buf, sizeof(buf),
 					 "Undefined label %s",
 					 cur_instr->patch_label->name);
 				stop(buf, EX_DATAERR);
 				/* NOTREACHED */
 			}
 			f3_instr = &cur_instr->format.format3;
 			address = f3_instr->address;
 			address += cur_instr->patch_label->info.linfo->address;
 			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",
 			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%s", buf);
 				line++;
 		}
 		fprintf(listfile, "%04x %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
 		/*
 		 * Macro expansions can cause several instructions
 		 * to be output for a single source line.  Only
 		 * advance the line once in these cases.
 		 */
 		if (line == cur_instr->srcline) {
 			fgets(buf, sizeof(buf), ifile);
 			fprintf(listfile, "\t%s", buf);
 			line++;
 		} else {
 			fprintf(listfile, "\n");
 		}
 		instrptr++;
 	}
 	/* Dump the remainder of the file */
 	while(fgets(buf, sizeof(buf), ifile) != NULL)
 		fprintf(listfile, "             %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);
 	}
 }
	/*
	* Aic7xxx SCSI host adapter firmware asssembler
	*
	* Copyright (c) 1997, 1998, 2000, 2001 Justin T. Gibbs.
	* Copyright (c) 2001, 2002 Adaptec Inc.
	* All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions, and the following disclaimer,
	* without modification.
	* 2. Redistributions in binary form must reproduce at minimum a disclaimer
	* substantially similar to the "NO WARRANTY" disclaimer below
	* ("Disclaimer") and any redistribution must be conditioned upon
	* including a substantially similar Disclaimer requirement for further
	* binary redistribution.
	* 3. Neither the names of the above-listed copyright holders nor the names
	* of any contributors may be used to endorse or promote products derived
	* from this software without specific prior written permission.
	*
	* Alternatively, this software may be distributed under the terms of the
	* GNU General Public License ("GPL") version 2 as published by the Free
	* Software Foundation.
	*
	* NO WARRANTY
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	* POSSIBILITY OF SUCH DAMAGES.
	*
	* $Id: //depot/aic7xxx/aic7xxx/aicasm/aicasm.c#23 $
	*
	* $FreeBSD$
	*/
	#include <sys/types.h>
	#include <sys/mman.h>

	#include <ctype.h>
	#include <inttypes.h>
	#include <regex.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <sysexits.h>
	#include <unistd.h>

	#if linux
	#include <endian.h>
	#else
	#include <machine/endian.h>
	#endif

	#include "aicasm.h"
	#include "aicasm_symbol.h"
	#include "aicasm_insformat.h"

	typedef struct patch {
	STAILQ_ENTRY(patch) links;
	int patch_func;
	u_int begin;
	u_int skip_instr;
	u_int skip_patch;
	} patch_t;

	STAILQ_HEAD(patch_list, patch) patches;

	static void usage(void);
	static void back_patch(void);
	static void output_code(void);
	static void output_listing(char *ifilename);
	static void dump_scope(scope_t *scope);
	static void emit_patch(scope_t *scope, int patch);
	static int check_patch(patch_t **start_patch, int start_instr,
	int skip_addr, int func_vals);

	struct path_list search_path;
	int includes_search_curdir;
	char *appname;
	char *stock_include_file;
	FILE *ofile;
	char *ofilename;
	char *regfilename;
	FILE *regfile;
	char *listfilename;
	FILE *listfile;
	char *regdiagfilename;
	FILE *regdiagfile;
	int src_mode;
	int dst_mode;

	static STAILQ_HEAD(,instruction) seq_program;
	struct cs_tailq cs_tailq;
	struct scope_list scope_stack;
	symlist_t patch_functions;

	#if DEBUG
	extern int yy_flex_debug;
	extern int mm_flex_debug;
	extern int yydebug;
	extern int mmdebug;
	#endif
	extern FILE *yyin;
	extern int yyparse(void);

	int main(int argc, char *argv[]);

	int
	main(int argc, char *argv[])
	{
	extern char *optarg;
	extern int optind;
	int ch;
	int retval;
	char *inputfilename;
	scope_t *sentinal;

	STAILQ_INIT(&patches);
	SLIST_INIT(&search_path);
	STAILQ_INIT(&seq_program);
	TAILQ_INIT(&cs_tailq);
	SLIST_INIT(&scope_stack);

	/* Set Sentinal scope node */
	sentinal = scope_alloc();
	sentinal->type = SCOPE_ROOT;

	includes_search_curdir = 1;
	appname = *argv;
	regfile = NULL;
	listfile = NULL;
	#if DEBUG
	yy_flex_debug = 0;
	mm_flex_debug = 0;
	yydebug = 0;
	mmdebug = 0;
	#endif
	while ((ch = getopt(argc, argv, "d:i:l:n:o:p:r:I:")) != -1) {
	switch(ch) {
	case 'd':
	#if DEBUG
	if (strcmp(optarg, "s") == 0) {
	yy_flex_debug = 1;
	mm_flex_debug = 1;
	} else if (strcmp(optarg, "p") == 0) {
	yydebug = 1;
	mmdebug = 1;
	} else {
	fprintf(stderr, "%s: -d Requires either an "
	"'s' or 'p' argument\n", appname);
	usage();
	}
	#else
	stop("-d: Assembler not built with debugging "
	"information", EX_SOFTWARE);
	#endif
	break;
	case 'i':
	stock_include_file = optarg;
	break;
	case 'l':
	/* Create a program listing */
	if ((listfile = fopen(optarg, "w")) == NULL) {
	perror(optarg);
	stop(NULL, EX_CANTCREAT);
	}
	listfilename = optarg;
	break;
	case 'n':
	/* Don't complain about the -nostdinc directrive */
	if (strcmp(optarg, "ostdinc")) {
	fprintf(stderr, "%s: Unknown option -%c%s\n",
	appname, ch, optarg);
	usage();
	/* NOTREACHED */
	}
	break;
	case 'o':
	if ((ofile = fopen(optarg, "w")) == NULL) {
	perror(optarg);
	stop(NULL, EX_CANTCREAT);
	}
	ofilename = optarg;
	break;
	case 'p':
	/* Create Register Diagnostic "printing" Functions */
	if ((regdiagfile = fopen(optarg, "w")) == NULL) {
	perror(optarg);
	stop(NULL, EX_CANTCREAT);
	}
	regdiagfilename = optarg;
	break;
	case 'r':
	if ((regfile = fopen(optarg, "w")) == NULL) {
	perror(optarg);
	stop(NULL, EX_CANTCREAT);
	}
	regfilename = optarg;
	break;
	case 'I':
	{
	path_entry_t include_dir;

	if (strcmp(optarg, "-") == 0) {
	if (includes_search_curdir == 0) {
	fprintf(stderr, "%s: Warning - '-I-' "
	"specified multiple "
	"times\n", appname);
	}
	includes_search_curdir = 0;
	for (include_dir = SLIST_FIRST(&search_path);
	include_dir != NULL;
	include_dir = SLIST_NEXT(include_dir,
	links))
	/*
	* All entries before a '-I-' only
	* apply to includes specified with
	* quotes instead of "<>".
	*/
	include_dir->quoted_includes_only = 1;
	} else {
	include_dir =
	(path_entry_t)malloc(sizeof(*include_dir));
	if (include_dir == NULL) {
	perror(optarg);
	stop(NULL, EX_OSERR);
	}
	include_dir->directory = strdup(optarg);
	if (include_dir->directory == NULL) {
	perror(optarg);
	stop(NULL, EX_OSERR);
	}
	include_dir->quoted_includes_only = 0;
	SLIST_INSERT_HEAD(&search_path, include_dir,
	links);
	}
	break;
	}
	case '?':
	default:
	usage();
	/* NOTREACHED */
	}
	}
	argc -= optind;
	argv += optind;

	if (argc != 1) {
	fprintf(stderr, "%s: No input file specifiled\n", appname);
	usage();
	/* NOTREACHED */
	}

	if (regdiagfile != NULL
	&& (regfile == NULL \|\| stock_include_file == NULL)) {
	fprintf(stderr,
	"%s: The -p option requires the -r and -i options.\n",
	appname);
	usage();
	/* NOTREACHED */
	}
	symtable_open();
	inputfilename = *argv;
	include_file(*argv, SOURCE_FILE);
	retval = yyparse();
	if (retval == 0) {
	if (SLIST_FIRST(&scope_stack) == NULL
	\|\| SLIST_FIRST(&scope_stack)->type != SCOPE_ROOT) {
	stop("Unterminated conditional expression", EX_DATAERR);
	/* NOTREACHED */
	}

	/* Process outmost scope */
	process_scope(SLIST_FIRST(&scope_stack));
	/*
	* Decend the tree of scopes and insert/emit
	* patches as appropriate. We perform a depth first
	* tranversal, recursively handling each scope.
	*/
	/* start at the root scope */
	dump_scope(SLIST_FIRST(&scope_stack));

	/* Patch up forward jump addresses */
	back_patch();

	if (ofile != NULL)
	output_code();
	if (regfile != NULL)
	symtable_dump(regfile, regdiagfile);
	if (listfile != NULL)
	output_listing(inputfilename);
	}

	stop(NULL, 0);
	/* NOTREACHED */
	return (0);
	}

	static void
	usage()
	{

	(void)fprintf(stderr,
	"usage: %-16s [-nostdinc] [-I-] [-I directory] [-o output_file]\n"
	" [-r register_output_file [-p register_diag_file -i includefile]]\n"
	" [-l program_list_file]\n"
	" input_file\n", appname);
	exit(EX_USAGE);
	}

	static void
	back_patch()
	{
	struct instruction *cur_instr;

	for (cur_instr = STAILQ_FIRST(&seq_program);
	cur_instr != NULL;
	cur_instr = STAILQ_NEXT(cur_instr, links)) {
	if (cur_instr->patch_label != NULL) {
	struct ins_format3 *f3_instr;
	u_int address;

	if (cur_instr->patch_label->type != LABEL) {
	char buf[255];

	snprintf(buf, sizeof(buf),
	"Undefined label %s",
	cur_instr->patch_label->name);
	stop(buf, EX_DATAERR);
	/* NOTREACHED */
	}
	f3_instr = &cur_instr->format.format3;
	address = f3_instr->address;
	address += cur_instr->patch_label->info.linfo->address;
	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",
	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%s", buf);
	line++;
	}
	fprintf(listfile, "%04x %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
	/*
	* Macro expansions can cause several instructions
	* to be output for a single source line. Only
	* advance the line once in these cases.
	*/
	if (line == cur_instr->srcline) {
	fgets(buf, sizeof(buf), ifile);
	fprintf(listfile, "\t%s", buf);
	line++;
	} else {
	fprintf(listfile, "\n");
	}
	instrptr++;
	}
	/* Dump the remainder of the file */
	while(fgets(buf, sizeof(buf), ifile) != NULL)
	fprintf(listfile, " %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);
	}
	}