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authorWang Nan <wangnan0@huawei.com>2016-07-18 06:01:08 +0000
committerArnaldo Carvalho de Melo <acme@redhat.com>2016-07-26 10:08:53 -0300
commit9b16137ab0feec00f8c9b52a63d4034a6d199d30 (patch)
treeec26a5f8b2c9ab6f3f08022792a668a1cf625dc4 /tools/lib
parent674d2d69b14f677a771ceec4b48bfade94a0c5f1 (diff)
downloadlinux-9b16137ab0feec00f8c9b52a63d4034a6d199d30.tar.bz2
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@huawei.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Cc: Zefan Li <lizefan@huawei.com> 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 <acme@redhat.com>
Diffstat (limited to 'tools/lib')
-rw-r--r--tools/lib/bpf/libbpf.c7
1 files changed, 6 insertions, 1 deletions
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;