@@ -238,6 +238,8 @@ struct bpf_program {
__u32 line_info_rec_size;
__u32 line_info_cnt;
__u32 prog_flags;
+
+ char *overwritten_section_name;
};
struct bpf_struct_ops {
@@ -442,6 +444,7 @@ static void bpf_program__exit(struct bpf_program *prog)
zfree(&prog->pin_name);
zfree(&prog->insns);
zfree(&prog->reloc_desc);
+ zfree(&prog->overwritten_section_name);
prog->nr_reloc = 0;
prog->insns_cnt = 0;
@@ -6637,7 +6640,7 @@ static int libbpf_find_attach_btf_id(struct bpf_program *prog)
{
enum bpf_attach_type attach_type = prog->expected_attach_type;
__u32 attach_prog_fd = prog->attach_prog_fd;
- const char *name = prog->section_name;
+ const char *name = prog->overwritten_section_name ? : prog->section_name;
int i, err;
if (!name)
@@ -8396,3 +8399,11 @@ void bpf_object__destroy_skeleton(struct bpf_object_skeleton *s)
free(s->progs);
free(s);
}
+
+char *bpf_program__overwrite_section_name(struct bpf_program *prog,
+ const char *sec_name)
+{
+ prog->overwritten_section_name = strdup(sec_name);
+
+ return prog->overwritten_section_name;
+}
@@ -595,6 +595,10 @@ bpf_program__bpil_addr_to_offs(struct bpf_prog_info_linear *info_linear);
LIBBPF_API void
bpf_program__bpil_offs_to_addr(struct bpf_prog_info_linear *info_linear);
+LIBBPF_API char *
+bpf_program__overwrite_section_name(struct bpf_program *prog,
+ const char *sec_name);
+
/*
* A helper function to get the number of possible CPUs before looking up
* per-CPU maps. Negative errno is returned on failure.
@@ -235,3 +235,8 @@ LIBBPF_0.0.7 {
btf__align_of;
libbpf_find_kernel_btf;
} LIBBPF_0.0.6;
+
+LIBBPF_0.0.8 {
+ global:
+ bpf_program__overwrite_section_name;
+} LIBBPF_0.0.7;
This is a temporary solution before Eelco Chaudron's work for bpf_program__set_attach_target(): https://patchwork.ozlabs.org/patch/1237539/ Signed-off-by: Song Liu <songliubraving@fb.com> --- tools/lib/bpf/libbpf.c | 13 ++++++++++++- tools/lib/bpf/libbpf.h | 4 ++++ tools/lib/bpf/libbpf.map | 5 +++++ 3 files changed, 21 insertions(+), 1 deletion(-)