diff options
| author | Yang Shi <yang.shi@linaro.org> | 2016-05-16 16:36:26 -0700 |
|---|---|---|
| committer | Michael Bestas <mkbestas@lineageos.org> | 2022-04-19 00:51:29 +0300 |
| commit | f2ff2852cf78ee8fd06e46ef83c4f0bb2f91b283 (patch) | |
| tree | 572e7d1dfa92bd381329e8a4cbe31b4c7ec9c839 /net/socket.c | |
| parent | b63b623cb9de3858e45f4923ddb121fe0886e1ba (diff) | |
bpf: arm64: remove callee-save registers use for tmp registers
In the current implementation of ARM64 eBPF JIT, R23 and R24 are used for
tmp registers, which are callee-saved registers. This leads to variable size
of JIT prologue and epilogue. The latest blinding constant change prefers to
constant size of prologue and epilogue. AAPCS reserves R9 ~ R15 for temp
registers which not need to be saved/restored during function call. So, replace
R23 and R24 to R10 and R11, and remove tmp_used flag to save 2 instructions for
some jited BPF program.
CC: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Zi Shen Lim <zlim.lnx@gmail.com>
Signed-off-by: Yang Shi <yang.shi@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Chatur27 <jasonbright2709@gmail.com>
Diffstat (limited to 'net/socket.c')
0 files changed, 0 insertions, 0 deletions