1/* instructions used to output a skb based software event, produced
  2 * from code snippet:
  3 * struct TMP {
  4 *  uint64_t tmp;
  5 * } tt;
  6 * tt.tmp = 5;
  7 * bpf_perf_event_output(skb, &connection_tracking_event_map, 0,
  8 *			 &tt, sizeof(tt));
  9 * return 1;
 10 *
 11 * the bpf assembly from llvm is:
 12 *        0:       b7 02 00 00 05 00 00 00         r2 = 5
 13 *        1:       7b 2a f8 ff 00 00 00 00         *(u64 *)(r10 - 8) = r2
 14 *        2:       bf a4 00 00 00 00 00 00         r4 = r10
 15 *        3:       07 04 00 00 f8 ff ff ff         r4 += -8
 16 *        4:       18 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00    r2 = 0ll
 17 *        6:       b7 03 00 00 00 00 00 00         r3 = 0
 18 *        7:       b7 05 00 00 08 00 00 00         r5 = 8
 19 *        8:       85 00 00 00 19 00 00 00         call 25
 20 *        9:       b7 00 00 00 01 00 00 00         r0 = 1
 21 *       10:       95 00 00 00 00 00 00 00         exit
 22 *
 23 *     The reason I put the code here instead of fill_helpers is that map fixup
 24 *     is against the insns, instead of filled prog.
 25 */
 26
 27#define __PERF_EVENT_INSNS__					\
 28	BPF_MOV64_IMM(BPF_REG_2, 5),				\
 29	BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_2, -8),		\
 30	BPF_MOV64_REG(BPF_REG_4, BPF_REG_10),			\
 31	BPF_ALU64_IMM(BPF_ADD, BPF_REG_4, -8),			\
 32	BPF_LD_MAP_FD(BPF_REG_2, 0),				\
 33	BPF_MOV64_IMM(BPF_REG_3, 0),				\
 34	BPF_MOV64_IMM(BPF_REG_5, 8),				\
 35	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,		\
 36		     BPF_FUNC_perf_event_output),		\
 37	BPF_MOV64_IMM(BPF_REG_0, 1),				\
 38	BPF_EXIT_INSN(),
 39{
 40	"perfevent for sockops",
 41	.insns = { __PERF_EVENT_INSNS__ },
 42	.prog_type = BPF_PROG_TYPE_SOCK_OPS,
 43	.fixup_map_event_output = { 4 },
 44	.result = ACCEPT,
 45	.retval = 1,
 46},
 47{
 48	"perfevent for tc",
 49	.insns =  { __PERF_EVENT_INSNS__ },
 50	.prog_type = BPF_PROG_TYPE_SCHED_CLS,
 51	.fixup_map_event_output = { 4 },
 52	.result = ACCEPT,
 53	.retval = 1,
 54},
 55{
 56	"perfevent for lwt out",
 57	.insns =  { __PERF_EVENT_INSNS__ },
 58	.prog_type = BPF_PROG_TYPE_LWT_OUT,
 59	.fixup_map_event_output = { 4 },
 60	.result = ACCEPT,
 61	.retval = 1,
 62},
 63{
 64	"perfevent for xdp",
 65	.insns =  { __PERF_EVENT_INSNS__ },
 66	.prog_type = BPF_PROG_TYPE_XDP,
 67	.fixup_map_event_output = { 4 },
 68	.result = ACCEPT,
 69	.retval = 1,
 70},
 71{
 72	"perfevent for socket filter",
 73	.insns =  { __PERF_EVENT_INSNS__ },
 74	.prog_type = BPF_PROG_TYPE_SOCKET_FILTER,
 75	.fixup_map_event_output = { 4 },
 76	.result = ACCEPT,
 77	.retval = 1,
 78},
 79{
 80	"perfevent for sk_skb",
 81	.insns =  { __PERF_EVENT_INSNS__ },
 82	.prog_type = BPF_PROG_TYPE_SK_SKB,
 83	.fixup_map_event_output = { 4 },
 84	.result = ACCEPT,
 85	.retval = 1,
 86},
 87{
 88	"perfevent for cgroup skb",
 89	.insns =  { __PERF_EVENT_INSNS__ },
 90	.prog_type = BPF_PROG_TYPE_CGROUP_SKB,
 91	.fixup_map_event_output = { 4 },
 92	.result = ACCEPT,
 93	.retval = 1,
 94},
 95{
 96	"perfevent for cgroup dev",
 97	.insns =  { __PERF_EVENT_INSNS__ },
 98	.prog_type = BPF_PROG_TYPE_CGROUP_DEVICE,
 99	.fixup_map_event_output = { 4 },
100	.result = ACCEPT,
101	.retval = 1,
102},
103{
104	"perfevent for cgroup sysctl",
105	.insns =  { __PERF_EVENT_INSNS__ },
106	.prog_type = BPF_PROG_TYPE_CGROUP_SYSCTL,
107	.fixup_map_event_output = { 4 },
108	.result = ACCEPT,
109	.retval = 1,
110},
111{
112	"perfevent for cgroup sockopt",
113	.insns =  { __PERF_EVENT_INSNS__ },
114	.prog_type = BPF_PROG_TYPE_CGROUP_SOCKOPT,
115	.expected_attach_type = BPF_CGROUP_SETSOCKOPT,
116	.fixup_map_event_output = { 4 },
117	.result = ACCEPT,
118	.retval = 1,
119},