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Subject[PATCH 10/13] libbpf: Add bpf_object__run_(begin|end) functions
Date
Add bpf_object__run_(begin|end) functions to run
BEGIN/END code for specific object.

Link: http://lkml.kernel.org/n/tip-hj1hwb7fshdwco706j22ela3@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/lib/bpf/libbpf.c | 30 ++++++++++++++++++++++++++++++
tools/lib/bpf/libbpf.h | 4 ++++
2 files changed, 34 insertions(+)

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 26231e278bb8..f1f999d64d6a 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -45,6 +45,7 @@

#include "libbpf.h"
#include "bpf.h"
+#include "interp.h"

#ifndef EM_BPF
#define EM_BPF 247
@@ -2107,3 +2108,32 @@ int bpf_prog_load(const char *file, enum bpf_prog_type type,
*prog_fd = bpf_program__fd(first_prog);
return 0;
}
+
+static u64 bpf_program__run(struct bpf_program *prog,
+ struct bpf_insn *insn,
+ struct bpf_interp *interp)
+{
+ interp->insns = prog->insns;
+ interp->insns_cnt = prog->insns_cnt;
+ interp->insns_start = insn - prog->insns;
+
+ return bpf_interp__run(interp);
+}
+
+u64 bpf_object__run_begin(struct bpf_object *obj, struct bpf_interp *interp)
+{
+ struct bpf_program *prog = obj->text;
+ struct bpf_insn *insn = obj->insn_begin;
+
+ pr_debug("running BEGIN(%p) for %s\n", insn, prog->name);
+ return insn && bpf_program__run(obj->text, insn, interp);
+}
+
+u64 bpf_object__run_end(struct bpf_object *obj, struct bpf_interp *interp)
+{
+ struct bpf_program *prog = obj->text;
+ struct bpf_insn *insn = obj->insn_end;
+
+ pr_debug("running END(%p) for %s\n", insn, prog->name);
+ return insn && bpf_program__run(obj->text, insn, interp);
+}
diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h
index bfc4d0411ec5..8ac4d4efcc1b 100644
--- a/tools/lib/bpf/libbpf.h
+++ b/tools/lib/bpf/libbpf.h
@@ -96,6 +96,10 @@ struct bpf_program;
struct bpf_program *bpf_program__next(struct bpf_program *prog,
struct bpf_object *obj);

+struct bpf_interp;
+u64 bpf_object__run_begin(struct bpf_object *obj, struct bpf_interp *interp);
+u64 bpf_object__run_end(struct bpf_object *obj, struct bpf_interp *interp);
+
#define bpf_object__for_each_program(pos, obj) \
for ((pos) = bpf_program__next(NULL, (obj)); \
(pos) != NULL; \
--
2.13.6
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