Yang Shi 4c1cd4fdfd 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>		2016-05-17 14:03:33 -04:00
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bpf_jit_comp.c	bpf: arm64: remove callee-save registers use for tmp registers	2016-05-17 14:03:33 -04:00
bpf_jit.h	arm64: bpf: fix div-by-zero case	2015-11-06 16:58:36 +00:00
Makefile