Messages in this thread Patch in this message | | | From | Christophe Leroy <> | Subject | [PATCH v1 05/10] powerpc/bpf/32: BPF prog is never called with more than one arg | Date | Thu, 1 Dec 2022 08:56:30 +0100 |
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BPF progs are never called with more than one argument, plus the tail call count as a second argument when needed.
So, no need to retrieve 9th and 10th argument (5th 64 bits argument) from the stack in prologue.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> --- arch/powerpc/net/bpf_jit_comp32.c | 6 ------ 1 file changed, 6 deletions(-)
diff --git a/arch/powerpc/net/bpf_jit_comp32.c b/arch/powerpc/net/bpf_jit_comp32.c index 7f54d37bede6..7c129fe810f5 100644 --- a/arch/powerpc/net/bpf_jit_comp32.c +++ b/arch/powerpc/net/bpf_jit_comp32.c @@ -159,12 +159,6 @@ void bpf_jit_build_prologue(u32 *image, struct codegen_context *ctx) if (bpf_is_seen_register(ctx, i)) EMIT(PPC_RAW_STW(i, _R1, bpf_jit_stack_offsetof(ctx, i))); - /* If needed retrieve arguments 9 and 10, ie 5th 64 bits arg.*/ - if (bpf_is_seen_register(ctx, bpf_to_ppc(BPF_REG_5))) { - EMIT(PPC_RAW_LWZ(bpf_to_ppc(BPF_REG_5) - 1, _R1, BPF_PPC_STACKFRAME(ctx)) + 8); - EMIT(PPC_RAW_LWZ(bpf_to_ppc(BPF_REG_5), _R1, BPF_PPC_STACKFRAME(ctx)) + 12); - } - /* Setup frame pointer to point to the bpf stack area */ if (bpf_is_seen_register(ctx, bpf_to_ppc(BPF_REG_FP))) { EMIT(PPC_RAW_LI(bpf_to_ppc(BPF_REG_FP) - 1, 0)); -- 2.38.1
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