Documentation / arm64 / kasan-offsets.sh


Based on kernel version 5.11. Page generated on 2021-02-15 21:58 EST.

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#!/bin/sh
 
# Print out the KASAN_SHADOW_OFFSETS required to place the KASAN SHADOW
# start address at the top of the linear region
 
print_kasan_offset () {
	printf "%02d\t" $1
	printf "0x%08x00000000\n" $(( (0xffffffff & (-1 << ($1 - 1 - 32))) \
			- (1 << (64 - 32 - $2)) ))
}
 
echo KASAN_SHADOW_SCALE_SHIFT = 3
printf "VABITS\tKASAN_SHADOW_OFFSET\n"
print_kasan_offset 48 3
print_kasan_offset 47 3
print_kasan_offset 42 3
print_kasan_offset 39 3
print_kasan_offset 36 3
echo
echo KASAN_SHADOW_SCALE_SHIFT = 4
printf "VABITS\tKASAN_SHADOW_OFFSET\n"
print_kasan_offset 48 4
print_kasan_offset 47 4
print_kasan_offset 42 4
print_kasan_offset 39 4
print_kasan_offset 36 4