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perf bpf: Add unistd.h to the headers accessible to bpf proggies

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Start with a getpid() function wrapping BPF_FUNC_get_current_pid_tgid,
idea is to mimic the system headers.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-zo8hv22onidep7tm785dzxfk@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2018-11-06 15:21:45 -03:00
parent b1a9d7b019
commit 1475d35c4a
1 changed files with 10 additions and 0 deletions
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10
tools/perf/include/bpf/unistd.h Normal file
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// SPDX-License-Identifier: LGPL-2.1
#include <bpf.h>
static int (*bpf_get_current_pid_tgid)(void) = (void *)BPF_FUNC_get_current_pid_tgid;
static pid_t getpid(void)
{
return bpf_get_current_pid_tgid();
}