linux_dsm_epyc7002/tools/perf/include/bpf/bpf.h
Arnaldo Carvalho de Melo 664b6a95d7 perf bpf: Add syscall_exit() helper
So that we can hook to the syscalls:sys_exit_SYSCALL tracepoints in
addition to the syscalls:sys_enter_SYSCALL we hook using the
syscall_enter() helper.

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-6qh8aph1jklyvdu7w89c0izc@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-08-30 15:52:20 -03:00

40 lines
1.1 KiB
C

// SPDX-License-Identifier: GPL-2.0
#ifndef _PERF_BPF_H
#define _PERF_BPF_H
#include <uapi/linux/bpf.h>
/*
* A helper structure used by eBPF C program to describe map attributes to
* elf_bpf loader, taken from tools/testing/selftests/bpf/bpf_helpers.h:
*/
struct bpf_map {
unsigned int type;
unsigned int key_size;
unsigned int value_size;
unsigned int max_entries;
unsigned int map_flags;
unsigned int inner_map_idx;
unsigned int numa_node;
};
#define SEC(NAME) __attribute__((section(NAME), used))
#define probe(function, vars) \
SEC(#function "=" #function " " #vars) function
#define syscall_enter(name) \
SEC("syscalls:sys_enter_" #name) syscall_enter_ ## name
#define syscall_exit(name) \
SEC("syscalls:sys_exit_" #name) syscall_exit_ ## name
#define license(name) \
char _license[] SEC("license") = #name; \
int _version SEC("version") = LINUX_VERSION_CODE;
static int (*probe_read)(void *dst, int size, const void *unsafe_addr) = (void *)BPF_FUNC_probe_read;
static int (*probe_read_str)(void *dst, int size, const void *unsafe_addr) = (void *)BPF_FUNC_probe_read_str;
#endif /* _PERF_BPF_H */