linux-kernel - Re: [6/6] ppc: ebpf/jit: Implement JIT compiler for extended BPF

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Message-Id: <3rWKtT2tSrz9t2G@ozlabs.org>
Date:	Fri, 17 Jun 2016 22:53:21 +1000 (AEST)
From:	Michael Ellerman <mpe@...erman.id.au>
To:	"Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	netdev@...r.kernel.org
Cc:	Matt Evans <matt@...abs.org>,
	Daniel Borkmann <daniel@...earbox.net>,
	Alexei Starovoitov <ast@...com>,
	Denis Kirjanov <kda@...ux-powerpc.org>,
	Paul Mackerras <paulus@...ba.org>,
	"David S. Miller" <davem@...emloft.net>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>
Subject: Re: [6/6] ppc: ebpf/jit: Implement JIT compiler for extended BPF

On Tue, 2016-07-06 at 13:32:23 UTC, "Naveen N. Rao" wrote:
> diff --git a/arch/powerpc/net/bpf_jit_comp64.c b/arch/powerpc/net/bpf_jit_comp64.c
> new file mode 100644
> index 0000000..954ff53
> --- /dev/null
> +++ b/arch/powerpc/net/bpf_jit_comp64.c
> @@ -0,0 +1,956 @@
...
> +
> +static void bpf_jit_fill_ill_insns(void *area, unsigned int size)
> +{
> +	int *p = area;
> +
> +	/* Fill whole space with trap instructions */
> +	while (p < (int *)((char *)area + size))
> +		*p++ = BREAKPOINT_INSTRUCTION;
> +}

This breaks the build for some configs, presumably you're missing a header:

  arch/powerpc/net/bpf_jit_comp64.c:30:10: error: 'BREAKPOINT_INSTRUCTION' undeclared (first use in this function)

http://kisskb.ellerman.id.au/kisskb/buildresult/12720611/

cheers