tools: kwboot: Show image type and error parsing reasons

Show image type and version during parsing of kwbimage.
And show reasons in error messages when parsing failed.
This can help to debug issues with invalid images.

Signed-off-by: Pali Rohár <pali@kernel.org>

1 files changed, 34 insertions, 5 deletions

diff --git a/tools/kwboot.c b/tools/kwboot.c
index cb31d5b..7c66648 100644
--- a/tools/kwboot.c
+++ b/tools/kwboot.c
@@ -1976,6 +1976,21 @@ _inject_baudrate_change_code(void *img, size_t *size, int for_data,
 	}
 }
 
+static const char *
+kwboot_img_type(uint8_t blockid)
+{
+	switch (blockid) {
+	case IBR_HDR_I2C_ID: return "I2C";
+	case IBR_HDR_SPI_ID: return "SPI";
+	case IBR_HDR_NAND_ID: return "NAND";
+	case IBR_HDR_SATA_ID: return "SATA";
+	case IBR_HDR_PEX_ID: return "PEX";
+	case IBR_HDR_UART_ID: return "UART";
+	case IBR_HDR_SDIO_ID: return "SDIO";
+	default: return "unknown";
+	}
+}
+
 static int
 kwboot_img_patch(void *img, size_t *size, int baudrate)
 {
@@ -1989,8 +2004,10 @@ kwboot_img_patch(void *img, size_t *size, int baudrate)
 
 	hdr = img;
 
-	if (*size < sizeof(struct main_hdr_v1))
+	if (*size < sizeof(struct main_hdr_v1)) {
+		fprintf(stderr, "Invalid image header size\n");
 		goto err;
+	}
 
 	image_ver = kwbimage_version(img);
 	if (image_ver != 0 && image_ver != 1) {
@@ -2000,12 +2017,18 @@ kwboot_img_patch(void *img, size_t *size, int baudrate)
 
 	hdrsz = kwbheader_size(hdr);
 
-	if (*size < hdrsz)
+	if (*size < hdrsz) {
+		fprintf(stderr, "Invalid image header size\n");
 		goto err;
+	}
+
+	kwboot_printv("Detected kwbimage v%d with %s boot signature\n", image_ver, kwboot_img_type(hdr->blockid));
 
 	csum = kwboot_hdr_csum8(hdr) - hdr->checksum;
-	if (csum != hdr->checksum)
+	if (csum != hdr->checksum) {
+		fprintf(stderr, "Image has invalid header checksum stored in image header\n");
 		goto err;
+	}
 
 	srcaddr = le32_to_cpu(hdr->srcaddr);
 
@@ -2028,9 +2051,15 @@ kwboot_img_patch(void *img, size_t *size, int baudrate)
 		break;
 	}
 
-	if (hdrsz > le32_to_cpu(hdr->srcaddr) ||
-	    *size < le32_to_cpu(hdr->srcaddr) + le32_to_cpu(hdr->blocksize))
+	if (hdrsz > le32_to_cpu(hdr->srcaddr)) {
+		fprintf(stderr, "Image has invalid data offset stored in image header\n");
+		goto err;
+	}
+
+	if (*size < le32_to_cpu(hdr->srcaddr) + le32_to_cpu(hdr->blocksize)) {
+		fprintf(stderr, "Image has invalid data size stored in image header\n");
 		goto err;
+	}
 
 	for_each_opt_hdr_v1 (ohdr, hdr) {
 		if (!opt_hdr_v1_valid_size(ohdr, (const uint8_t *)hdr + hdrsz)) {