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libbpf: Add BPF_CORE_READ/BPF_CORE_READ_INTO helpers

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Add few macros simplifying BCC-like multi-level probe reads, while also
emitting CO-RE relocations for each read.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20191008175942.1769476-7-andriin@fb.com
This commit is contained in:
Andrii Nakryiko
2019-10-08 10:59:41 -07:00
committed by Daniel Borkmann
parent e01a75c159
commit 7db3822ab9
12 changed files with 187 additions and 24 deletions
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3
tools/lib/bpf/Makefile
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@@ -250,7 +250,8 @@ install_headers: bpf_helper_defs.h
$(call do_install,bpf_helpers.h,$(prefix)/include/bpf,644); \
$(call do_install,bpf_helper_defs.h,$(prefix)/include/bpf,644); \
$(call do_install,bpf_tracing.h,$(prefix)/include/bpf,644); \
$(call do_install,bpf_endian.h,$(prefix)/include/bpf,644);
$(call do_install,bpf_endian.h,$(prefix)/include/bpf,644); \
$(call do_install,bpf_core_read.h,$(prefix)/include/bpf,644);
install_pkgconfig: $(PC_FILE)
$(call QUIET_INSTALL, $(PC_FILE)) \