From 716ca530e1c4515d8683c9d5be3d56b301758b66 Mon Sep 17 00:00:00 2001
From: James <>
Date: Wed, 4 Nov 2015 11:49:21 +0000
Subject: trunk-47381

---
 package/boot/uboot-oxnas/files/tools/mkox820crc.c | 123 ++++++++++++++++++++++
 1 file changed, 123 insertions(+)
 create mode 100644 package/boot/uboot-oxnas/files/tools/mkox820crc.c

(limited to 'package/boot/uboot-oxnas/files/tools/mkox820crc.c')

diff --git a/package/boot/uboot-oxnas/files/tools/mkox820crc.c b/package/boot/uboot-oxnas/files/tools/mkox820crc.c
new file mode 100644
index 0000000..d100191
--- /dev/null
+++ b/package/boot/uboot-oxnas/files/tools/mkox820crc.c
@@ -0,0 +1,123 @@
+/* J J Larworthy 27 September 2006 */
+
+/* file to read the boot sector of a dis and the loaded image and report
+ * if the boot rom would accept the data as intact and suitable for use
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/errno.h>
+
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+
+extern uint32_t crc32(uint32_t, const unsigned char *, unsigned int);
+
+#define NUMBER_VECTORS   12
+struct {
+	unsigned int start_vector[NUMBER_VECTORS];
+	char code[4];
+	unsigned int header_length;
+	unsigned int reserved[3];
+	unsigned int length;
+	unsigned int img_CRC;
+	unsigned int CRC;
+} img_header;
+
+void print_usage(void)
+{
+	printf("update_header file.bin\n");
+}
+
+void print_header(void)
+{
+	int i;
+
+	printf("vectors in header\n");
+	for (i = 0; i < NUMBER_VECTORS; i++) {
+		printf("%d:0x%08x\n", i, img_header.start_vector[i]);
+	}
+	printf("length:%8x\nimg_CRC:0x%08x\nHeader CRC:0x%08x\n",
+		img_header.length, img_header.img_CRC, img_header.CRC);
+}
+
+int main(int argc, char **argv)
+{
+	int in_file;
+	int status;
+	int unsigned crc;
+	int file_length;
+	int len;
+
+	struct stat file_stat;
+
+	void *executable;
+
+	in_file = open(argv[1], O_RDWR);
+
+	if (in_file < 0) {
+		printf("failed to open file:%s\n", argv[optind]);
+		return -ENOENT;
+	}
+
+	status = fstat(in_file, &file_stat);
+
+	/* read header and obtain size of image */
+	status = read(in_file, &img_header, sizeof(img_header));
+
+	file_length = file_stat.st_size - sizeof(img_header);
+
+	if (img_header.length != file_length) {
+		printf("size in header:%d, size of file: %d\n",
+			img_header.length, file_length);
+	}
+	img_header.length = file_length;
+
+	/* read working image and CRC */
+	executable = malloc(file_length);
+
+	status = read(in_file, executable, file_length);
+
+	if (status != file_length) {
+		printf("Failed to load image\n");
+		return -ENOENT;
+	}
+
+	/* verify image CRC */
+	crc = crc32(0, (const unsigned char *) executable, img_header.length);
+
+	if (crc != img_header.img_CRC) {
+		printf("New Image CRC:0x%08x, hdr:0x%08x\n", crc,
+			img_header.img_CRC);
+		img_header.img_CRC = crc;
+	}
+	memcpy(img_header.code, "BOOT", 4);
+	img_header.header_length = sizeof(img_header);
+
+	/* check header CRC */
+	crc = crc32(0, (const unsigned char *) &img_header,
+			sizeof(img_header) - sizeof(unsigned int));
+	if (crc != img_header.CRC) {
+		printf("New header CRC - crc:0x%08x hdr:0x%08x\n", crc,
+			img_header.CRC);
+		img_header.CRC = crc;
+	}
+
+	/* re-write the file */
+	status = lseek(in_file, 0, SEEK_SET);
+	if (status != 0) {
+		printf("failed to rewind\n");
+		return 1;
+	}
+	len = write(in_file, &img_header, sizeof(img_header));
+	assert(len == sizeof(img_header));
+	len = write(in_file, executable, file_length);
+	assert(len == file_length);
+	close(in_file);
+
+	return 0;
+}
-- 
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