@@ -54,6 +54,7 @@ SEC("sockops")
int bpf_testcb(struct bpf_sock_ops *skops)
{
char header[sizeof(struct ipv6hdr) + sizeof(struct tcphdr)];
+ struct bpf_sock_ops *reuse = skops;
struct tcphdr *thdr;
int good_call_rv = 0;
int bad_call_rv = 0;
@@ -62,6 +63,18 @@ int bpf_testcb(struct bpf_sock_ops *skops)
int v = 0;
int op;
+ /* Test reading fields in bpf_sock_ops using single register */
+ asm volatile (
+ "%[reuse] = *(u32 *)(%[reuse] +96)"
+ : [reuse] "+r"(reuse)
+ :);
+
+ asm volatile (
+ "%[op] = *(u32 *)(%[skops] +96)"
+ : [op] "+r"(op)
+ : [skops] "r"(skops)
+ :);
+
op = (int) skops->op;
update_event_map(op);