When reading a file using the load command from a FAT file system this works fine irrespective of the alignment.
When reading from an EXT4 partition raw sectors are read to unaligned addresses which leads to a failure to load the file => echo $kernel_addr_r 0x40080000 => load mmc 0:3 $kernel_addr_r helloworld.efi 10a1 1 fs/fs_internal.c(76) fs_devread: partition->start 0x400000, sector 0x2, block_len 0x400, log2blksz 0x9, buffer 0x00000000b9f8ea40 fs/fs_internal.c(76) fs_devread: partition->start 0x400000, sector 0x42031, block_len 0xe00, log2blksz 0x9, buffer 0x00000000400801ff ** fs_devread read error - block Failed to load 'helloworld.efi' The problem is in fs_devread() in the part marked as /* Get the read to the beginning of a partition */ Here the wrong assumption is made that variable buf is cache-aligned after advancing it by an odd number of bytes. Valerij first observed the problem when trying to read the EXT4 partition why the EFI_FILE_PROTOCOL on a Pine64 system. I was able to reproduce it on the Pine64 A64 LTS. Best regards Heinrich
