Commit-ID: 9b16137ab0feec00f8c9b52a63d4034a6d199d30
Gitweb: http://git.kernel.org/tip/9b16137ab0feec00f8c9b52a63d4034a6d199d30
Author: Wang Nan <wangnan0@xxxxxxxxxx>
AuthorDate: Mon, 18 Jul 2016 06:01:08 +0000
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Tue, 26 Jul 2016 10:08:53 -0300
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 <wangnan0@xxxxxxxxxx>
Acked-by: Alexei Starovoitov <ast@xxxxxxxxxx>
Cc: Zefan Li <lizefan@xxxxxxxxxx>
Cc: pi3orama@xxxxxxx
Link: http://lkml.kernel.org/r/1468821668-60088-1-git-send-email-wangnan0@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
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 32e6b6b..b699aea 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;
--
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