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libbpf: Add BPF_PROG_BIND_MAP syscall and use it on .rodata section

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The patch adds a simple wrapper bpf_prog_bind_map around the syscall.
When the libbpf tries to load a program, it will probe the kernel for
the support of this syscall and unconditionally bind .rodata section
to the program.

Signed-off-by: YiFei Zhu <zhuyifei@google.com>
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Cc: YiFei Zhu <zhuyifei1999@gmail.com>
Link: https://lore.kernel.org/bpf/20200915234543.3220146-4-sdf@google.com
This commit is contained in:
YiFei Zhu
2020-09-15 16:45:41 -07:00
committed by Andrii Nakryiko
parent f38fccf3cc
commit 3cf3c6cd26
4 changed files with 94 additions and 0 deletions
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1
src/libbpf.map
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@@ -302,6 +302,7 @@ LIBBPF_0.1.0 {
LIBBPF_0.2.0 {
global:
bpf_prog_bind_map;
bpf_program__section_name;
perf_buffer__buffer_cnt;
perf_buffer__buffer_fd;