mirror of
https://github.com/torvalds/linux
synced 2024-10-21 02:39:51 +00:00
025dceb0fa
Once the JITed images for each function in a multi-function program
are generated after the first three JIT passes, we only need to fix
the target address for the branch instruction corresponding to each
bpf-to-bpf function call.
This introduces the following optimizations for reducing the work
done by the JIT compiler when handling multi-function programs:
[1] Instead of doing two extra passes to fix the bpf function calls,
do just one as that would be sufficient.
[2] During the extra pass, only overwrite the instruction sequences
for the bpf-to-bpf function calls as everything else would still
remain exactly the same. This also reduces the number of writes
to the JITed image.
[3] Do not regenerate the prologue and the epilogue during the extra
pass as that would be redundant.
Signed-off-by: Sandipan Das <sandipan@linux.ibm.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
|
||
|---|---|---|
| .. | ||
| bpf_jit.h | ||
| bpf_jit32.h | ||
| bpf_jit64.h | ||
| bpf_jit_asm.S | ||
| bpf_jit_comp.c | ||
| bpf_jit_comp64.c | ||
| Makefile | ||