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perf tools: Fix PowerPC native building

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Checks BPF syscall number, turn off libbpf building on platform doesn't
correctly support sys_bpf instead of blocking compiling.

Reported-and-Tested-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1452520124-2073-7-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Wang Nan 2016-01-11 13:47:57 +00:00 committed by Arnaldo Carvalho de Melo
parent 3167eea27b
commit 8f9e05fb29
2 changed files with 21 additions and 3 deletions
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20
tools/build/feature/test-bpf.c
View File

@ -1,9 +1,23 @@
#include <asm/unistd.h>
#include <linux/bpf.h>
#include <unistd.h>
#ifndef __NR_bpf
# if defined(__i386__)
# define __NR_bpf 357
# elif defined(__x86_64__)
# define __NR_bpf 321
# elif defined(__aarch64__)
# define __NR_bpf 280
# error __NR_bpf not defined. libbpf does not support your arch.
# endif
#endif
int main(void)
{
union bpf_attr attr;
/* Check fields in attr */
attr.prog_type = BPF_PROG_TYPE_KPROBE;
attr.insn_cnt = 0;
attr.insns = 0;
@ -14,5 +28,9 @@ int main(void)
attr.kern_version = 0;
attr = attr;
return 0;
/*
* Test existence of __NR_bpf and BPF_PROG_LOAD.
* This call should fail if we run the testcase.
*/
return syscall(__NR_bpf, BPF_PROG_LOAD, attr, sizeof(attr));
}

4
tools/lib/bpf/bpf.c
View File

@ -14,8 +14,8 @@
#include "bpf.h"
/*
* When building perf, unistd.h is override. Define __NR_bpf is
* required to be defined.
* When building perf, unistd.h is overrided. __NR_bpf is
* required to be defined explicitly.
*/
#ifndef __NR_bpf
# if defined(__i386__)