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authorAndrii Nakryiko2020-12-18 15:56:12 -0800
committerAlexei Starovoitov2021-01-08 13:39:24 -0800
commit792001f4f7aa036b1f1c1ed7bce44bb49126208a (patch)
tree95d6e3385c55e51fba29224e53d2c4f6cefbc3ab /net/strparser/Makefile
parent833d22f2f922bbee6430e558417af060db6bbe9c (diff)
libbpf: Add user-space variants of BPF_CORE_READ() family of macros
Add BPF_CORE_READ_USER(), BPF_CORE_READ_USER_STR() and their _INTO() variations to allow reading CO-RE-relocatable kernel data structures from the user-space. One of such cases is reading input arguments of syscalls, while reaping the benefits of CO-RE relocations w.r.t. handling 32/64 bit conversions and handling missing/new fields in UAPI data structs. Suggested-by: Gilad Reti <gilad.reti@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20201218235614.2284956-2-andrii@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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