aicasm.c

2.0.12 (May 13th, 2004) - Flag driver threads with PF_FREEZE to support software suspend. 2.0.

	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,
#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
		/*
		 * 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);
	}
}