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x86: bpf_jit: support negative offsets
Commit a998d43 claimed to introduce negative offset support to x86 jit, but it couldn't be working, since at the time of the execution of LD+ABS or LD+IND instructions via call into bpf_internal_load_pointer_neg_helper() the %edx (3rd argument of this func) had junk value instead of access size in bytes (1 or 2 or 4). Store size into %edx instead of %ecx (what original commit intended to do) Fixes: a998d43 ("bpf jit: Let the x86 jit handle negative offsets") Signed-off-by: Alexei Starovoitov <[email protected]> Cc: Jan Seiffert <[email protected]> Cc: Eric Dumazet <[email protected]> Acked-by: Eric Dumazet <[email protected]> Signed-off-by: David S. Miller <[email protected]>
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