lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Tue, 19 May 2015 17:18:44 -0700 From: Alexei Starovoitov <ast@...mgrid.com> To: Andy Lutomirski <luto@...capital.net> CC: "David S. Miller" <davem@...emloft.net>, Ingo Molnar <mingo@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, Michael Holzheu <holzheu@...ux.vnet.ibm.com>, Zi Shen Lim <zlim.lnx@...il.com>, Linux API <linux-api@...r.kernel.org>, Network Development <netdev@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: Re: [PATCH net-next 1/4] bpf: allow bpf programs to tail-call other bpf programs On 5/19/15 5:13 PM, Andy Lutomirski wrote: > > IMO this is starting to get a bit ugly. Would it be possible to have > the program dereference the subprogram reference itself from the jump > table? There would have to be a verifier type that represents a > reference to a program tail-call entry point, but that seems better > than having this weird indirection. Which part? I don't think you've looked at examples yet. network parser has to call itself. Otherwise we cannot parse 10 mpls labels or TLVs. Indirection via jump_table also has to be there. We need to dynamically add and remove programs form this jump table. It cannot be all static. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists