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authorJiri Olsa <jolsa@kernel.org>2020-03-12 20:55:58 +0100
committerAlexei Starovoitov <ast@kernel.org>2020-03-13 12:49:51 -0700
commit535911c80ad4f5801700e9d827a1985bbff41519 (patch)
treebbb6ef548496d99a0d46e3d961748856fe8d285d /include/linux/bpf.h
parent6a64037d4bf252bb8cf13917320c8e001da8997a (diff)
bpf: Add struct bpf_ksym
Adding 'struct bpf_ksym' object that will carry the kallsym information for bpf symbol. Adding the start and end address to begin with. It will be used by bpf_prog, bpf_trampoline, bpf_dispatcher objects. The symbol_start/symbol_end values were originally used to sort bpf_prog objects. For the address displayed in /proc/kallsyms we are using prog->bpf_func value. I'm using the bpf_func value for program symbol start instead of the symbol_start, because it makes no difference for sorting bpf_prog objects and we can use it directly as an address to display it in /proc/kallsyms. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20200312195610.346362-4-jolsa@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'include/linux/bpf.h')
-rw-r--r--include/linux/bpf.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/bpf.h b/include/linux/bpf.h
index fe1f8b075378..6ca3d5c8ccf3 100644
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -471,6 +471,11 @@ int arch_prepare_bpf_trampoline(void *image, void *image_end,
u64 notrace __bpf_prog_enter(void);
void notrace __bpf_prog_exit(struct bpf_prog *prog, u64 start);
+struct bpf_ksym {
+ unsigned long start;
+ unsigned long end;
+};
+
enum bpf_tramp_prog_type {
BPF_TRAMP_FENTRY,
BPF_TRAMP_FEXIT,
@@ -653,6 +658,7 @@ struct bpf_prog_aux {
u32 size_poke_tab;
struct latch_tree_node ksym_tnode;
struct list_head ksym_lnode;
+ struct bpf_ksym ksym;
const struct bpf_prog_ops *ops;
struct bpf_map **used_maps;
struct bpf_prog *prog;