D26895.diff
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	Index: head/sys/ddb/db_sym.c
	===================================================================
	--- head/sys/ddb/db_sym.c
	+++ head/sys/ddb/db_sym.c
	@@ -371,8 +371,21 @@
	unsigned int diff;
	size_t newdiff;
	int i;
	- c_db_sym_t ret = C_DB_SYM_NULL, sym;
	+ c_db_sym_t ret, sym;

	+ /*
	+ * The kernel will never map the first page, so any symbols in that
	+ * range cannot refer to addresses. Some third-party assembly files
	+ * define internal constants which appear in their symbol table.
	+ * Avoiding the lookup for those symbols avoids replacing small offsets
	+ * with those symbols during disassembly.
	+ */
	+ if (val < PAGE_SIZE) {
	+ *offp = 0;
	+ return (C_DB_SYM_NULL);
	+ }
	+
	+ ret = C_DB_SYM_NULL;
	newdiff = diff = val;
	for (i = 0; i < db_nsymtab; i++) {
	sym = X_db_search_symbol(&db_symtabs[i], val, strategy, &newdiff);