Revision - 638dc54 - bpf: get rid of all builtins for packet access - origin: https://github.com/cilium/cilium

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09 April 2024, 21:14:05 UTC

Revision 638dc5443aaad81f808b653f9eed76264d6460b8 authored by Daniel Borkmann on 01 February 2019, 10:49:05 UTC, committed by Ian Vernon on 02 February 2019, 02:15:28 UTC

bpf: get rid of all builtins for packet access

[ upstream commit 70277b966fd5fcf38c86376dd0fb2aa257366803 ]

Existance of load_byte() in our code forces JIT to generate real crappy
code for every helper call that potentially changes packet data since
it has to recache skb->data/hlen or push/pop registers to stack (see [0])
otherwise (due to calling convention), not to speak that exception handling
is a mess with LD_ABS/IND. Lets get rid of this crazy madness to allow
for better (smaller) JIT code generation.

  [0] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e782bdcf58c5ace7b7d58b2436177de9785a18e8

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Joe Stringer <joe@cilium.io>

1 parent 5e5b6c3

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Tip revision: 638dc5443aaad81f808b653f9eed76264d6460b8 authored by Daniel Borkmann on 01 February 2019, 10:49:05 UTC
bpf: get rid of all builtins for packet access

Tip revision: 638dc54

File	Mode	Size
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Documentation
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bugtool
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cilium-health
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AUTHORS	-rw-r--r--	5.6 KB
CODEOWNERS	-rw-r--r--	1.1 KB
CONTRIBUTING.md	-rw-r--r--	193 bytes
Dockerfile	-rw-r--r--	1.9 KB
Dockerfile.builder	-rw-r--r--	1.1 KB
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Jenkinsfile.nightly	-rw-r--r--	4.7 KB
LICENSE	-rw-r--r--	11.1 KB
Makefile	-rw-r--r--	11.7 KB
Makefile.defs	-rw-r--r--	1.3 KB
Makefile.quiet	-rw-r--r--	456 bytes
NEWS.rst	-rw-r--r--	20 bytes
README.rst	-rw-r--r--	14.7 KB
VERSION	-rw-r--r--	10 bytes
Vagrantfile	-rw-r--r--	11.9 KB
cilium-docker-plugin.Dockerfile	-rw-r--r--	511 bytes
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docs.Jenkinsfile	-rw-r--r--	2.6 KB
flannel.Jenkinsfile	-rw-r--r--	3.4 KB
ginkgo-kubernetes-all.Jenkinsfile	-rw-r--r--	6.5 KB
ginkgo.Jenkinsfile	-rw-r--r--	4.2 KB
kubernetes-upstream.Jenkinsfile	-rw-r--r--	4.2 KB

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bpf: get rid of all builtins for packet access

README.rst