v4.19.13 snapshot.
diff --git a/tools/perf/include/bpf/bpf.h b/tools/perf/include/bpf/bpf.h
new file mode 100644
index 0000000..47897d6
--- /dev/null
+++ b/tools/perf/include/bpf/bpf.h
@@ -0,0 +1,36 @@
+// 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 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 */
diff --git a/tools/perf/include/bpf/stdio.h b/tools/perf/include/bpf/stdio.h
new file mode 100644
index 0000000..2899cb7
--- /dev/null
+++ b/tools/perf/include/bpf/stdio.h
@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <bpf.h>
+
+struct bpf_map SEC("maps") __bpf_stdout__ = {
+ .type = BPF_MAP_TYPE_PERF_EVENT_ARRAY,
+ .key_size = sizeof(int),
+ .value_size = sizeof(u32),
+ .max_entries = __NR_CPUS__,
+};
+
+static int (*perf_event_output)(void *, struct bpf_map *, int, void *, unsigned long) =
+ (void *)BPF_FUNC_perf_event_output;
+
+#define puts(from) \
+ ({ const int __len = sizeof(from); \
+ char __from[__len] = from; \
+ perf_event_output(args, &__bpf_stdout__, BPF_F_CURRENT_CPU, \
+ &__from, __len & (sizeof(from) - 1)); })