whatcanGOwrong

go/pkg/mod/github.com/cilium/ebpf@v0.11.0/testdata/subprog_reloc.c

@@ -0,0 +1,38 @@
+/* This file excercises the ELF loader.
+ */
+
+#include "common.h"
+
+char __license[] __section("license") = "MIT";
+
+struct bpf_map_def hash_map __section("maps") = {
+	.type        = BPF_MAP_TYPE_HASH,
+	.key_size    = sizeof(uint32_t),
+	.value_size  = sizeof(uint64_t),
+	.max_entries = 1,
+};
+
+static int sub_prog() {
+	uint32_t key = 0;
+	uint64_t val = 42;
+
+	map_update_elem(&hash_map, &key, &val, /* BPF_ANY */ 0);
+
+	return 0;
+}
+
+__section("xdp") int fp_relocation() {
+	uint32_t key = 0;
+	uint64_t val = 1;
+
+	map_update_elem(&hash_map, &key, &val, /* BPF_ANY */ 0);
+
+	for_each_map_elem(&hash_map, sub_prog, (void *)0, 0);
+
+	uint64_t *new_val = map_lookup_elem(&hash_map, &key);
+	if (!new_val) {
+		return -1;
+	}
+
+	return *new_val;
+}