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Groups > linux.kernel > #1415711
| From | Zi Shen Lim <zlim.lnx@gmail.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH net-next v2 3/4] arm64: bpf: optimize JMP_CALL |
| Date | 2016-06-07 07:30 +0200 |
| Message-ID | <rHhKq-6U6-19@gated-at.bofh.it> (permalink) |
| References | <rHhKp-6U6-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Remove superfluous stack frame, saving us 3 instructions for every JMP_CALL. Signed-off-by: Zi Shen Lim <zlim.lnx@gmail.com> --- arch/arm64/net/bpf_jit_comp.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/arch/arm64/net/bpf_jit_comp.c b/arch/arm64/net/bpf_jit_comp.c index 51abc97..7ae304e 100644 --- a/arch/arm64/net/bpf_jit_comp.c +++ b/arch/arm64/net/bpf_jit_comp.c @@ -578,11 +578,8 @@ emit_cond_jmp: const u64 func = (u64)__bpf_call_base + imm; emit_a64_mov_i64(tmp, func, ctx); - emit(A64_PUSH(A64_FP, A64_LR, A64_SP), ctx); - emit(A64_MOV(1, A64_FP, A64_SP), ctx); emit(A64_BLR(tmp), ctx); emit(A64_MOV(1, r0, A64_R(0)), ctx); - emit(A64_POP(A64_FP, A64_LR, A64_SP), ctx); break; } /* tail call */ -- 1.9.1
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[PATCH net-next v2 0/4] arm64 BPF JIT updates Zi Shen Lim <zlim.lnx@gmail.com> - 2016-06-07 07:30 +0200 [PATCH net-next v2 1/4] bpf: fix missing header inclusion Zi Shen Lim <zlim.lnx@gmail.com> - 2016-06-07 07:30 +0200 [PATCH net-next v2 4/4] arm64: bpf: optimize LD_ABS, LD_IND Zi Shen Lim <zlim.lnx@gmail.com> - 2016-06-07 07:30 +0200 [PATCH net-next v2 3/4] arm64: bpf: optimize JMP_CALL Zi Shen Lim <zlim.lnx@gmail.com> - 2016-06-07 07:30 +0200 Re: [PATCH net-next v2 0/4] arm64 BPF JIT updates David Miller <davem@davemloft.net> - 2016-06-08 09:40 +0200
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