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| author | Alan Maguire <alan.maguire@oracle.com> | 2024-06-20 12:17:31 +0300 |
|---|---|---|
| committer | Andrii Nakryiko <andrii@kernel.org> | 2024-06-22 00:45:07 +0300 |
| commit | 8646db238997df36c6ad71a9d7e0b52ceee221b2 (patch) | |
| tree | 3968d9444fab7f563fc71f78ac0fb2fd5df188e0 /kernel/bpf/Makefile | |
| parent | e7ac331b30555cf1a0826784a346f36dbf800451 (diff) | |
| download | linux-8646db238997df36c6ad71a9d7e0b52ceee221b2.tar.xz | |
libbpf,bpf: Share BTF relocate-related code with kernel
Share relocation implementation with the kernel. As part of this,
we also need the type/string iteration functions so also share
btf_iter.c file. Relocation code in kernel and userspace is identical
save for the impementation of the reparenting of split BTF to the
relocated base BTF and retrieval of the BTF header from "struct btf";
these small functions need separate user-space and kernel implementations
for the separate "struct btf"s they operate upon.
One other wrinkle on the kernel side is we have to map .BTF.ids in
modules as they were generated with the type ids used at BTF encoding
time. btf_relocate() optionally returns an array mapping from old BTF
ids to relocated ids, so we use that to fix up these references where
needed for kfuncs.
Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/bpf/20240620091733.1967885-5-alan.maguire@oracle.com
Diffstat (limited to 'kernel/bpf/Makefile')
| -rw-r--r-- | kernel/bpf/Makefile | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/kernel/bpf/Makefile b/kernel/bpf/Makefile index 7eb9ad3a3ae6..0291eef9ce92 100644 --- a/kernel/bpf/Makefile +++ b/kernel/bpf/Makefile @@ -50,5 +50,11 @@ endif obj-$(CONFIG_BPF_PRELOAD) += preload/ obj-$(CONFIG_BPF_SYSCALL) += relo_core.o -$(obj)/relo_core.o: $(srctree)/tools/lib/bpf/relo_core.c FORCE +obj-$(CONFIG_BPF_SYSCALL) += btf_iter.o +obj-$(CONFIG_BPF_SYSCALL) += btf_relocate.o + +# Some source files are common to libbpf. +vpath %.c $(srctree)/kernel/bpf:$(srctree)/tools/lib/bpf + +$(obj)/%.o: %.c FORCE $(call if_changed_rule,cc_o_c) |