devs/foxbox
1
0
Fork 0
forked from len0rd/rockbox
Code Pull requests Activity

multiboot: Refactor boot data validation, add version numbers

Browse source 
Instead of verifying the CRC before every access of the boot data,
verify the CRC once at startup and set a flag to indicate the boot
data is valid.

Also add a framework to support multiple boot protocol versions.
Firmware declares the maximum supported protocol version using a
version byte in the boot data header. The bootloader chooses the
highest version supported by it and the firmware when deciding
what boot protocol to use.

Change-Id: I810194625dc0833f026d2a23b8d64ed467fa6aca
This commit is contained in:
Aidan MacDonald 2022-12-22 19:23:29 +00:00
parent af644e02a1
commit 6ffd42548b
11 changed files with 150 additions and 59 deletions
Download patch file Download diff file Expand all files Collapse all files

9
firmware/rolo.c
View file

@ -250,12 +250,9 @@ int rolo_load(const char* filename)
err = LOAD_FIRMWARE(filebuf, filename, filebuf_size);
#if defined(HAVE_BOOTDATA) && !defined(SIMULATOR)
/* write the bootdata as if rolo were the bootloader */
unsigned int crc = 0;
if (strcmp(filename, BOOTDIR "/" BOOTFILE) == 0)
crc = crc_32(boot_data.payload, boot_data.length, 0xffffffff);
if(crc > 0 && crc == boot_data.crc)
/* write the bootdata as if rolo were the bootloader
* FIXME: this won't work for root redirect... */
if (!strcmp(filename, BOOTDIR "/" BOOTFILE) && boot_data_valid)
write_bootdata(filebuf, filebuf_size, boot_data.boot_volume); /* rb-loader.c */
#endif