Index: uspace/app/taskdump/fibrildump.c
===================================================================
--- uspace/app/taskdump/fibrildump.c	(revision 1619faa28e6911344d7aea822650ebf41044c395)
+++ uspace/app/taskdump/fibrildump.c	(revision da9d6cae9d1c35542e015f3d2826946a83fef587)
@@ -43,5 +43,5 @@
 #include <udebug.h>
 
-static int fibrildump_read_uintptr(void *, uintptr_t, uintptr_t *);
+static errno_t fibrildump_read_uintptr(void *, uintptr_t, uintptr_t *);
 
 static stacktrace_ops_t fibrildump_st_ops = {
@@ -49,5 +49,5 @@
 }; 
 
-static int fibrildump_read_uintptr(void *arg, uintptr_t addr, uintptr_t *data)
+static errno_t fibrildump_read_uintptr(void *arg, uintptr_t addr, uintptr_t *data)
 {
 	async_sess_t *sess = (async_sess_t *)arg;
@@ -56,7 +56,7 @@
 }
 
-static int read_link(async_sess_t *sess, uintptr_t addr, link_t *link)
+static errno_t read_link(async_sess_t *sess, uintptr_t addr, link_t *link)
 {
-	int rc;
+	errno_t rc;
 
 	rc = udebug_mem_read(sess, (void *)link, addr, sizeof(link_t));
@@ -64,7 +64,7 @@
 }
 
-static int read_fibril(async_sess_t *sess, uintptr_t addr, fibril_t *fibril)
+static errno_t read_fibril(async_sess_t *sess, uintptr_t addr, fibril_t *fibril)
 {
-	int rc;
+	errno_t rc;
 
 	rc = udebug_mem_read(sess, (void *)fibril, addr, sizeof(fibril_t));
@@ -72,5 +72,5 @@
 }
 
-int fibrils_dump(symtab_t *symtab, async_sess_t *sess)
+errno_t fibrils_dump(symtab_t *symtab, async_sess_t *sess)
 {
 	uintptr_t fibril_list_addr;
@@ -79,5 +79,5 @@
 	uintptr_t addr, fibril_addr;
 	uintptr_t pc, fp;
-	int rc;
+	errno_t rc;
 
 	/*