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tools lib bpf: Use official ELF e_machine value

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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>
This commit is contained in:
Wang Nan 2016-07-18 06:01:08 +00:00 committed by Arnaldo Carvalho de Melo
parent 674d2d69b1
commit 9b16137ab0
1 changed files with 6 additions and 1 deletions
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7
tools/lib/bpf/libbpf.c
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@ -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;