x86, kaslr: Allow random address could be below loaded address
Now new output buffer is always after current one.
With correct tracking in mem_avoid, we can buffer below that.
That would make sure when bootloader like patched grub2 or kexec
have put output rather near the end of ram, we still can get
random base below output.
Now just pick 512M as min_addr.
with this patch, will get:
early console in decompress_kernel
decompress_kernel:
input: [0x13e9ee3b4-0x13f36b9df], output: [0x13c000000-0x13f394fff], heap: [0x13f376ac0-0x13f37eabf]
boot via startup_64
KASLR using RDTSC...
KASLR using RDTSC...
new output: [0x6f000000-0x72394fff]
Decompressing Linux... xz... Parsing ELF... Performing relocations... done.
Booting the kernel.
[ 0.000000] bootconsole [uart0] enabled
[ 0.000000] Kernel Layout:
[ 0.000000] .text: [0x6f000000-0x70096a9c]
[ 0.000000] .rodata: [0x70200000-0x70a4efff]
[ 0.000000] .data: [0x70c00000-0x70e4e9bf]
[ 0.000000] .init: [0x70e50000-0x7120bfff]
[ 0.000000] .bss: [0x71219000-0x7234efff]
[ 0.000000] .brk: [0x7234f000-0x72374fff]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
1 file changed
