diff options
| -rw-r--r-- | aarch64/src/fdt.rs | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/aarch64/src/fdt.rs b/aarch64/src/fdt.rs index dd15b0a..23d0481 100644 --- a/aarch64/src/fdt.rs +++ b/aarch64/src/fdt.rs @@ -4,6 +4,7 @@ use std::ffi::CStr; use std::fs::File; +use std::io::Read; use arch::fdt::{ begin_node, end_node, finish_fdt, generate_prop32, generate_prop64, property, property_cstring, @@ -187,7 +188,15 @@ fn create_chosen_node( begin_node(fdt, "chosen")?; property_u32(fdt, "linux,pci-probe-only", 1)?; property_cstring(fdt, "bootargs", cmdline)?; - property_u64(fdt, "kaslr", 0)?; + + let mut random_file = File::open("/dev/urandom").map_err(Error::FdtIoError)?; + let mut kaslr_seed_bytes = [0u8; 8]; + random_file + .read_exact(&mut kaslr_seed_bytes) + .map_err(Error::FdtIoError)?; + let kaslr_seed = u64::from_le_bytes(kaslr_seed_bytes); + property_u64(fdt, "kaslr-seed", kaslr_seed)?; + if let Some((initrd_addr, initrd_size)) = initrd { let initrd_start = initrd_addr.offset() as u32; let initrd_end = initrd_start + initrd_size as u32; |