patch-2.4.21 linux-2.4.21/drivers/scsi/aic79xx/aicasm/aicasm.c

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diff -urN linux-2.4.20/drivers/scsi/aic79xx/aicasm/aicasm.c linux-2.4.21/drivers/scsi/aic79xx/aicasm/aicasm.c
@@ -0,0 +1,835 @@
+/*
+ * 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#22 $
+ *
+ * $FreeBSD$
+ */
+#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",
+#if BYTE_ORDER == 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,
+#if BYTE_ORDER == 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);
+	}
+}
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)