Index: uspace/lib/c/generic/loader.c
===================================================================
--- uspace/lib/c/generic/loader.c	(revision 6e84dc3382e50a88e708b27b26e81ecced3b74f9)
+++ uspace/lib/c/generic/loader.c	(revision 25c60f4e31eed4c7355c6d2aa86ca7f9ca81851a)
@@ -35,5 +35,5 @@
 #include <ipc/loader.h>
 #include <ipc/services.h>
-#include <ipc/ns.h>
+#include <ns.h>
 #include <libc.h>
 #include <task.h>
@@ -44,4 +44,5 @@
 #include <vfs/vfs.h>
 #include <loader/loader.h>
+#include "private/loader.h"
 
 /** Connect to a new program loader.
@@ -63,13 +64,16 @@
 loader_t *loader_connect(void)
 {
-	int phone_id = service_connect_blocking(SERVICE_LOAD, 0, 0);
-	if (phone_id < 0)
-		return NULL;
-	
 	loader_t *ldr = malloc(sizeof(loader_t));
 	if (ldr == NULL)
 		return NULL;
 	
-	ldr->phone_id = phone_id;
+	async_sess_t *sess =
+	    service_connect_blocking(EXCHANGE_SERIALIZE, SERVICE_LOAD, 0, 0);
+	if (sess == NULL) {
+		free(ldr);
+		return NULL;
+	}
+	
+	ldr->sess = sess;
 	return ldr;
 }
@@ -88,15 +92,19 @@
 {
 	/* Get task ID. */
-	ipc_call_t answer;
-	aid_t req = async_send_0(ldr->phone_id, LOADER_GET_TASKID, &answer);
-	int rc = async_data_read_start(ldr->phone_id, task_id, sizeof(task_id_t));
-	if (rc != EOK) {
-		async_wait_for(req, NULL);
-		return rc;
-	}
-	
-	sysarg_t retval;
-	async_wait_for(req, &retval);
-	return (int) retval;
+	async_exch_t *exch = async_exchange_begin(ldr->sess);
+	
+	ipc_call_t answer;
+	aid_t req = async_send_0(exch, LOADER_GET_TASKID, &answer);
+	sysarg_t rc = async_data_read_start(exch, task_id, sizeof(task_id_t));
+	
+	async_exchange_end(exch);
+	
+	if (rc != EOK) {
+		async_wait_for(req, NULL);
+		return (int) rc;
+	}
+	
+	async_wait_for(req, &rc);
+	return (int) rc;
 }
 
@@ -112,26 +120,29 @@
 int loader_set_cwd(loader_t *ldr)
 {
-	char *cwd;
-	size_t len;
-
-	cwd = (char *) malloc(MAX_PATH_LEN + 1);
+	char *cwd = (char *) malloc(MAX_PATH_LEN + 1);
 	if (!cwd)
 		return ENOMEM;
+	
 	if (!getcwd(cwd, MAX_PATH_LEN + 1))
-		str_cpy(cwd, MAX_PATH_LEN + 1, "/"); 
-	len = str_length(cwd);
-	
-	ipc_call_t answer;
-	aid_t req = async_send_0(ldr->phone_id, LOADER_SET_CWD, &answer);
-	int rc = async_data_write_start(ldr->phone_id, cwd, len);
+		str_cpy(cwd, MAX_PATH_LEN + 1, "/");
+	
+	size_t len = str_length(cwd);
+	
+	async_exch_t *exch = async_exchange_begin(ldr->sess);
+	
+	ipc_call_t answer;
+	aid_t req = async_send_0(exch, LOADER_SET_CWD, &answer);
+	sysarg_t rc = async_data_write_start(exch, cwd, len);
+	
+	async_exchange_end(exch);
 	free(cwd);
-	if (rc != EOK) {
-		async_wait_for(req, NULL);
-		return rc;
-	}
-	
-	sysarg_t retval;
-	async_wait_for(req, &retval);
-	return (int) retval;
+	
+	if (rc != EOK) {
+		async_wait_for(req, NULL);
+		return (int) rc;
+	}
+	
+	async_wait_for(req, &rc);
+	return (int) rc;
 }
 
@@ -153,21 +164,23 @@
 	char *pa = absolutize(path, &pa_len);
 	if (!pa)
-		return 0;
+		return ENOMEM;
 	
 	/* Send program pathname */
-	ipc_call_t answer;
-	aid_t req = async_send_0(ldr->phone_id, LOADER_SET_PATHNAME, &answer);
-	int rc = async_data_write_start(ldr->phone_id, (void *) pa, pa_len);
-	if (rc != EOK) {
-		free(pa);
-		async_wait_for(req, NULL);
-		return rc;
-	}
-	
+	async_exch_t *exch = async_exchange_begin(ldr->sess);
+	
+	ipc_call_t answer;
+	aid_t req = async_send_0(exch, LOADER_SET_PATHNAME, &answer);
+	sysarg_t rc = async_data_write_start(exch, (void *) pa, pa_len);
+	
+	async_exchange_end(exch);
 	free(pa);
 	
-	sysarg_t retval;
-	async_wait_for(req, &retval);
-	return (int) retval;
+	if (rc != EOK) {
+		async_wait_for(req, NULL);
+		return (int) rc;
+	}
+	
+	async_wait_for(req, &rc);
+	return (int) rc;
 }
 
@@ -212,20 +225,21 @@
 	
 	/* Send serialized arguments to the loader */
-	ipc_call_t answer;
-	aid_t req = async_send_0(ldr->phone_id, LOADER_SET_ARGS, &answer);
-	sysarg_t rc = async_data_write_start(ldr->phone_id, (void *) arg_buf, buffer_size);
-	if (rc != EOK) {
-		async_wait_for(req, NULL);
-		return rc;
-	}
-	
-	async_wait_for(req, &rc);
-	if (rc != EOK)
-		return rc;
-	
-	/* Free temporary buffer */
+	async_exch_t *exch = async_exchange_begin(ldr->sess);
+	
+	ipc_call_t answer;
+	aid_t req = async_send_0(exch, LOADER_SET_ARGS, &answer);
+	sysarg_t rc = async_data_write_start(exch, (void *) arg_buf,
+	    buffer_size);
+	
+	async_exchange_end(exch);
 	free(arg_buf);
 	
-	return EOK;
+	if (rc != EOK) {
+		async_wait_for(req, NULL);
+		return (int) rc;
+	}
+	
+	async_wait_for(req, &rc);
+	return (int) rc;
 }
 
@@ -266,21 +280,21 @@
 	
 	/* Send serialized files to the loader */
-	ipc_call_t answer;
-	aid_t req = async_send_0(ldr->phone_id, LOADER_SET_FILES, &answer);
-	sysarg_t rc = async_data_write_start(ldr->phone_id, (void *) files_buf,
+	async_exch_t *exch = async_exchange_begin(ldr->sess);
+	
+	ipc_call_t answer;
+	aid_t req = async_send_0(exch, LOADER_SET_FILES, &answer);
+	sysarg_t rc = async_data_write_start(exch, (void *) files_buf,
 	    count * sizeof(fdi_node_t));
-	if (rc != EOK) {
-		async_wait_for(req, NULL);
-		return rc;
-	}
-	
-	async_wait_for(req, &rc);
-	if (rc != EOK)
-		return rc;
-	
-	/* Free temporary buffer */
+	
+	async_exchange_end(exch);
 	free(files_buf);
 	
-	return EOK;
+	if (rc != EOK) {
+		async_wait_for(req, NULL);
+		return (int) rc;
+	}
+	
+	async_wait_for(req, &rc);
+	return (int) rc;
 }
 
@@ -297,5 +311,9 @@
 int loader_load_program(loader_t *ldr)
 {
-	return (int) async_req_0_0(ldr->phone_id, LOADER_LOAD);
+	async_exch_t *exch = async_exchange_begin(ldr->sess);
+	int rc = async_req_0_0(exch, LOADER_LOAD);
+	async_exchange_end(exch);
+	
+	return rc;
 }
 
@@ -306,6 +324,6 @@
  * the task and its thread is stopped.
  *
- * After using this function, no further operations must be performed
- * on the loader structure. It should be de-allocated using free().
+ * After using this function, no further operations can be performed
+ * on the loader structure and it is deallocated.
  *
  * @param ldr Loader connection structure.
@@ -316,10 +334,14 @@
 int loader_run(loader_t *ldr)
 {
-	int rc = async_req_0_0(ldr->phone_id, LOADER_RUN);
+	async_exch_t *exch = async_exchange_begin(ldr->sess);
+	int rc = async_req_0_0(exch, LOADER_RUN);
+	async_exchange_end(exch);
+	
 	if (rc != EOK)
 		return rc;
 	
-	async_hangup(ldr->phone_id);
-	ldr->phone_id = 0;
+	async_hangup(ldr->sess);
+	free(ldr);
+	
 	return EOK;
 }
@@ -327,7 +349,7 @@
 /** Cancel the loader session.
  *
- * Tells the loader not to load any program and terminate.
- * After using this function, no further operations must be performed
- * on the loader structure. It should be de-allocated using free().
+ * Tell the loader not to load any program and terminate.
+ * After using this function, no further operations can be performed
+ * on the loader structure and it is deallocated.
  *
  * @param ldr Loader connection structure.
@@ -338,6 +360,6 @@
 void loader_abort(loader_t *ldr)
 {
-	async_hangup(ldr->phone_id);
-	ldr->phone_id = 0;
+	async_hangup(ldr->sess);
+	free(ldr);
 }