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ARM32 doesn't have instructions to do 64-bit/64-bit divisions. So, to
implement the following instructions:
BPF_ALU64 | BPF_DIV
BPF_ALU64 | BPF_MOD
BPF_ALU64 | BPF_SDIV
BPF_ALU64 | BPF_SMOD
We implement the above instructions by doing function calls to div64_u64()
and div64_u64_rem() for unsigned division/mod and calls to div64_s64()
for signed division/mod.
Signed-off-by: Puranjay Mohan <puranjay12@gmail.com>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://lore.kernel.org/r/20230907230550.1417590-7-puranjay12@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
71086041c2