From 9b16137ab0feec00f8c9b52a63d4034a6d199d30 Mon Sep 17 00:00:00 2001 From: Wang Nan Date: Mon, 18 Jul 2016 06:01:08 +0000 Subject: [PATCH] tools lib bpf: Use official ELF e_machine value New LLVM will issue newly assigned EM_BPF machine code. The new code will be propagated to glibc and libelf. This patch introduces the new machine code to libbpf. Signed-off-by: Wang Nan Acked-by: Alexei Starovoitov Cc: Zefan Li Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1468821668-60088-1-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/lib/bpf/libbpf.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index 32e6b6bc6f7d..b699aea9a025 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -37,6 +37,10 @@ #include "libbpf.h" #include "bpf.h" +#ifndef EM_BPF +#define EM_BPF 247 +#endif + #define __printf(a, b) __attribute__((format(printf, a, b))) __printf(1, 2) @@ -439,7 +443,8 @@ static int bpf_object__elf_init(struct bpf_object *obj) } ep = &obj->efile.ehdr; - if ((ep->e_type != ET_REL) || (ep->e_machine != 0)) { + /* Old LLVM set e_machine to EM_NONE */ + if ((ep->e_type != ET_REL) || (ep->e_machine && (ep->e_machine != EM_BPF))) { pr_warning("%s is not an eBPF object file\n", obj->path); err = -LIBBPF_ERRNO__FORMAT; -- 2.20.1