bpf, x86: Create bpf_tramp_run_ctx on the caller thread's stack

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BPF trampolines will create a bpf_tramp_run_ctx, a bpf_run_ctx, on
stacks and set/reset the current bpf_run_ctx before/after calling a
bpf_prog.

Signed-off-by: Kui-Feng Lee <kuifeng@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20220510205923.3206889-3-kuifeng@fb.com

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Kui-Feng Lee 2022-05-10 13:59:20 -07:00 • committed by Andrii Nakryiko

parent f7e0beaf39

commit e384c7b7b4

4 changed files with 66 additions and 19 deletions

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41

arch/x86/net/bpf_jit_comp.c

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17

include/linux/bpf.h

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7

kernel/bpf/syscall.c

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20

kernel/bpf/trampoline.c

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