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Subject: Re: [PATCH net-next] selftests: bpf: modify urandom_read and link it
 non-statically
To:     Stanislav Fomichev <sdf@fomichev.me>
Cc:     netdev@vger.kernel.org, Shuah Khan <shuah@kernel.org>,
        Alexei Starovoitov <ast@kernel.org>,
        Daniel Borkmann <daniel@iogearbox.net>,
        Martin KaFai Lau <kafai@fb.com>,
        Song Liu <songliubraving@fb.com>, Yonghong Song <yhs@fb.com>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@vger.kernel.org>,
        "open list:BPF (Safe dynamic programs and tools)" 
        <bpf@vger.kernel.org>, open list <linux-kernel@vger.kernel.org>
References: <20190315200414.32346-1-ivecera@redhat.com>
 <20190315200847.GC5481@mini-arch.hsd1.ca.comcast.net>
From:   Ivan Vecera <ivecera@redhat.com>
Message-ID: <2dcdc11c-4d04-4b0e-ddb7-04d969d04651@redhat.com>
Date:   Fri, 15 Mar 2019 21:14:43 +0100
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On 15. 03. 19 21:08, Stanislav Fomichev wrote:
> On 03/15, Ivan Vecera wrote:
>> After some experiences I found that urandom_read does not need to be
>> linked statically. When the 'read' syscall call is moved to separate
>> non-inlined function then bpf_get_stackid() is able to find
>> the executable in stack trace and extract its build_id from it.
> But why? Do you have some problems with it being linked statically?
> 
Dependency... you don't need to install static glibc to compile the bpf samples. 
Shared libc is available everytime.

Ivan