On 4/30/19 3:27 AM, Atish Patra wrote: [...]
>>> Yes. FIT image parsing can be done in that way. However, the idea was >>> here to load Image.gz directly. Image.gz is default compressed Linux >>> kernel image format in RISC-V. >> >> Sigh, and the image header is compressed as well, so there's no way to >> identify the image format, right ? And there's no decompressor, so the >> dcompressing has to be done by bootloader, which would need some sort of >> very smart way of figuring out which exact compression method is used ? >> > Yes. Image.gz is always gunzip. So checking first two bytes is enough to > confirm that it is a gz file. What happens once people start feeding it more exotic compression methods, like LZ4 or LZO or LZMA for example ? > The tricky part is length of the compressed file. I took another look at > the gunzip implementation in U-Boot. It looks like to me that compressed > header length just to parse the header correctly. It doesn't actually > use the "length" to decompress. In fact, it updates the length with > uncompressed bytes after the decompression. That's possible. -- Best regards, Marek Vasut _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot