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/* This file tests rewriting constants from C compiled code.
*/
#include "common.h"
char __license[] __section("license") = "MIT";
struct bpf_map_def map_val __section("maps") = {
.type = 1,
.key_size = sizeof(unsigned int),
.value_size = sizeof(unsigned int),
.max_entries = 1,
};
#define CONSTANT "constant"
#define LOAD_CONSTANT(param, var) asm("%0 = " param " ll" : "=r"(var))
__section("socket") int rewrite() {
unsigned long acc = 0;
LOAD_CONSTANT(CONSTANT, acc);
return acc;
}
__section("socket/map") int rewrite_map() {
unsigned int key = 0;
unsigned int *value = map_lookup_elem(&map_val, &key);
if (!value) {
return 0;
}
return *value;
}
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