From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wang Nan Subject: [PATCH 06/53] perf tools: Fix PowerPC native building Date: Mon, 11 Jan 2016 13:47:57 +0000 Message-ID: <1452520124-2073-7-git-send-email-wangnan0@huawei.com> References: <1452520124-2073-1-git-send-email-wangnan0@huawei.com> Mime-Version: 1.0 Content-Type: text/plain Cc: , , , , , Wang Nan , Sukadev Bhattiprolu To: Return-path: Received: from szxga03-in.huawei.com ([119.145.14.66]:41288 "EHLO szxga03-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759947AbcAKNtk (ORCPT ); Mon, 11 Jan 2016 08:49:40 -0500 In-Reply-To: <1452520124-2073-1-git-send-email-wangnan0@huawei.com> Sender: netdev-owner@vger.kernel.org List-ID: Checks BPF syscall number, turn off libbpf building on platform doesn't correctly support sys_bpf instead of blocking compiling. Reported-by: Naveen N. Rao Acked-by: Jiri Olsa Tested-by: Naveen N. Rao Signed-off-by: Wang Nan Cc: Arnaldo Carvalho de Melo Cc: Sukadev Bhattiprolu --- tools/build/feature/test-bpf.c | 20 +++++++++++++++++++- tools/lib/bpf/bpf.c | 4 ++-- 2 files changed, 21 insertions(+), 3 deletions(-) diff --git a/tools/build/feature/test-bpf.c b/tools/build/feature/test-bpf.c index 062bac8..b389026 100644 --- a/tools/build/feature/test-bpf.c +++ b/tools/build/feature/test-bpf.c @@ -1,9 +1,23 @@ +#include #include +#include + +#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)); } diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c index 5bdc6ea..1f91cc9 100644 --- a/tools/lib/bpf/bpf.c +++ b/tools/lib/bpf/bpf.c @@ -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__) -- 1.8.3.4