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tools: kwboot: Recalculate 4-byte data checksum after injecting baudrate code

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If data part of image is modified, update 4-byte data checksum.

It looks like A385 BootROM does not verify this checksum for image
loaded via UART, but we do not know if other BootROMs are also ignoring
it. It is always better to provide correct checksum.

Signed-off-by: Pali Rohár <pali@kernel.org>
[ refactored ]
Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Pali Rohár
2021-10-25 15:12:57 +02:00
committed by Stefan Roese
parent 063cb35281
commit 82c5a0ac71
1 changed files with 3 additions and 0 deletions
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3
tools/kwboot.c
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@@ -1544,6 +1544,9 @@ kwboot_img_patch(void *img, size_t *size, int baudrate)
kwboot_printv("Injecting code for changing baudrate back\n");
_inject_baudrate_change_code(img, size, 1, baudrate, 115200);
/* Update the 32-bit data checksum */
*kwboot_img_csum32_ptr(img) = kwboot_img_csum32(img);
/* recompute header size */
hdrsz = kwbheader_size(hdr);
}