diff --git a/context.c b/context.c
index f51c6e1..5776ed6 100644
--- a/context.c
+++ b/context.c
@@ -2,12 +2,13 @@
 #include <string.h>
 
 #include "context.h"
+#include "filedata.h"
 #include "list.h"
 #include "logging.h"
 
 static LIST_HEAD(context_list);
 
-struct context * create_context(void)
+struct context * create_context(const char *filename)
 {
 	struct context *ctx = malloc(sizeof(struct context));
 	if (ctx == NULL) {
@@ -17,6 +18,12 @@ struct context * create_context(void)
 
 	memset(ctx, 0, sizeof(struct context));
 
+	ctx->file = get_filedata(filename);
+	if (ctx->file == NULL) {
+		free(ctx);
+		return NULL;
+	}
+
 	list_add(&ctx->list, &context_list);
 	return ctx;
 }
@@ -28,6 +35,7 @@ int destroy_context(struct context *ctx)
 	if (ctx->dev_close != NULL)
 		ctx->dev_close(ctx);
 
+	free(ctx->file);
 	free(ctx);
 	return 0;
 }
diff --git a/context.h b/context.h
index 7975995..daaccbe 100644
--- a/context.h
+++ b/context.h
@@ -1,6 +1,7 @@
 #ifndef _CONTEXT_H_
 #define _CONTEXT_H_
 
+#include "filedata.h"
 #include "list.h"
 
 struct context {
@@ -25,9 +26,11 @@ struct context {
 
 	/* xmodem */
 	int lastpkt;
+
+	struct filedata *file;
 };
 
-struct context * create_context(void);
+struct context * create_context(const char *filename);
 int destroy_context(struct context *ctx);
 
 int context_close(void);
diff --git a/serial.c b/serial.c
index 4760930..23aea78 100644
--- a/serial.c
+++ b/serial.c
@@ -79,12 +79,8 @@ static int close_serial(struct context *ctx)
 	return 0;
 }
 
-int serial_init(const char *device)
+int serial_init(struct context *ctx, const char *device)
 {
-	struct context *ctx = create_context();
-	if (ctx == NULL)
-		return -1;
-
 	ctx->dev_privdata = malloc(sizeof(struct serial_device));
 	if (ctx->dev_privdata == NULL) {
 		log_print(LOG_WARN, "serial_init_cb(): out of memory");
diff --git a/serial.h b/serial.h
index a0e1596..0b3237e 100644
--- a/serial.h
+++ b/serial.h
@@ -1,6 +1,8 @@
 #ifndef _SERIAL_H_
 #define _SERIAL_H_
 
-int serial_init(const char *device);
+#include "context.h"
+
+int serial_init(struct context *ctx, const char *device);
 
 #endif /* _SERIAL_H_ */
diff --git a/xmodem.c b/xmodem.c
index a51de86..bbb9dbc 100644
--- a/xmodem.c
+++ b/xmodem.c
@@ -12,8 +12,6 @@
 #include "filedata.h"
 #include "logging.h"
 
-struct filedata *filedata;
-
 enum {
 	XM_SOH = 0x01,
 	XM_EOT = 0x04,
@@ -69,7 +67,7 @@ int xmodem_read(int fd, void *privdata)
 		break;
 
 	case XM_ACK:	/* next packet */
-		if (ctx->lastpkt * 128 == filedata->size)
+		if (ctx->lastpkt * 128 == ctx->file->size)
 			return -1;
 
 		pktnum = ctx->lastpkt +1;
@@ -80,12 +78,12 @@ int xmodem_read(int fd, void *privdata)
 		break;
 	}
 
-	if (pktnum * 128 < filedata->size) {
+	if (pktnum * 128 < ctx->file->size) {
 		pkt.header = XM_SOH;
 		pkt.count = ((pktnum +1) & 0xFF);
 		pkt.ncount = 0xFF - pkt.count;
 
-		memcpy(pkt.data, (void *)(filedata->data) + pktnum * 128, 128);
+		memcpy(pkt.data, (void *)(ctx->file->data) + pktnum * 128, 128);
 
 		calc_crc(&pkt);
 		write(fd, &pkt, sizeof(pkt));
@@ -99,17 +97,3 @@ int xmodem_read(int fd, void *privdata)
 	ctx->lastpkt = pktnum;
 	return 0;
 }
-
-int xmodem_init(const char *filename)
-{
-	filedata = get_filedata(filename);
-	if (filedata == NULL)
-		return -1;
-
-	return 0;
-}
-
-void xmodem_close(void)
-{
-	free(filedata);
-}
diff --git a/xmodem.h b/xmodem.h
index 362c785..b99ebb4 100644
--- a/xmodem.h
+++ b/xmodem.h
@@ -1,9 +1,6 @@
 #ifndef _XMODEM_H_
 #define _XMODEM_H_
 
-int xmodem_init(const char *filename);
-void xmodem_close(void);
-
 int xmodem_read(int fd, void *privdata);
 
 #endif /* _XMODEM_H_ */
diff --git a/zyxel-revert.c b/zyxel-revert.c
index 829be57..f6c28f2 100644
--- a/zyxel-revert.c
+++ b/zyxel-revert.c
@@ -8,7 +8,6 @@
 #include "context.h"
 #include "event.h"
 #include "serial.h"
-#include "xmodem.h"
 
 static struct option opts[] = {
 	{"device",	1, 0, 'd'},
@@ -45,17 +44,17 @@ int main(int argc, char *argv[])
 		}
 	} while (code != -1);
 
-	if (devicename == NULL || serial_init(devicename))
+	struct context *ctx = create_context(filename);
+	if (ctx == NULL)
 		exit(1);
 
-	if (filename == NULL || xmodem_init(filename)) {
+	if (devicename == NULL || serial_init(ctx, devicename)) {
 		context_close();
 		exit(1);
 	}
 
 	event_loop();
 
-	xmodem_close();
 	context_close();
 	return 0;
 }