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/* instructions used to output a skb based software event, produced
* from code snippet:
* struct TMP {
* uint64_t tmp;
* } tt;
* tt.tmp = 5;
* bpf_perf_event_output(skb, &connection_tracking_event_map, 0,
* &tt, sizeof(tt));
* return 1;
*
* the bpf assembly from llvm is:
* 0: b7 02 00 00 05 00 00 00 r2 = 5
* 1: 7b 2a f8 ff 00 00 00 00 *(u64 *)(r10 - 8) = r2
* 2: bf a4 00 00 00 00 00 00 r4 = r10
* 3: 07 04 00 00 f8 ff ff ff r4 += -8
* 4: 18 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 r2 = 0ll
* 6: b7 03 00 00 00 00 00 00 r3 = 0
* 7: b7 05 00 00 08 00 00 00 r5 = 8
* 8: 85 00 00 00 19 00 00 00 call 25
* 9: b7 00 00 00 01 00 00 00 r0 = 1
* 10: 95 00 00 00 00 00 00 00 exit
*
* The reason I put the code here instead of fill_helpers is that map fixup
* is against the insns, instead of filled prog.
*/
#define __PERF_EVENT_INSNS__ \
BPF_MOV64_IMM(BPF_REG_2, 5), \
BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_2, -8), \
BPF_MOV64_REG(BPF_REG_4, BPF_REG_10), \
BPF_ALU64_IMM(BPF_ADD, BPF_REG_4, -8), \
BPF_LD_MAP_FD(BPF_REG_2, 0), \
BPF_MOV64_IMM(BPF_REG_3, 0), \
BPF_MOV64_IMM(BPF_REG_5, 8), \
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, \
BPF_FUNC_perf_event_output), \
BPF_MOV64_IMM(BPF_REG_0, 1), \
BPF_EXIT_INSN(),
{
"perfevent for sockops",
.insns = { __PERF_EVENT_INSNS__ },
.prog_type = BPF_PROG_TYPE_SOCK_OPS,
.fixup_map_event_output = { 4 },
.result = ACCEPT,
.retval = 1,
},
{
"perfevent for tc",
.insns = { __PERF_EVENT_INSNS__ },
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
.fixup_map_event_output = { 4 },
.result = ACCEPT,
.retval = 1,
},
{
"perfevent for lwt out",
.insns = { __PERF_EVENT_INSNS__ },
.prog_type = BPF_PROG_TYPE_LWT_OUT,
.fixup_map_event_output = { 4 },
.result = ACCEPT,
.retval = 1,
},
{
"perfevent for xdp",
.insns = { __PERF_EVENT_INSNS__ },
.prog_type = BPF_PROG_TYPE_XDP,
.fixup_map_event_output = { 4 },
.result = ACCEPT,
.retval = 1,
},
{
"perfevent for socket filter",
.insns = { __PERF_EVENT_INSNS__ },
.prog_type = BPF_PROG_TYPE_SOCKET_FILTER,
.fixup_map_event_output = { 4 },
.result = ACCEPT,
.retval = 1,
},
{
"perfevent for sk_skb",
.insns = { __PERF_EVENT_INSNS__ },
.prog_type = BPF_PROG_TYPE_SK_SKB,
.fixup_map_event_output = { 4 },
.result = ACCEPT,
.retval = 1,
},
{
"perfevent for cgroup skb",
.insns = { __PERF_EVENT_INSNS__ },
.prog_type = BPF_PROG_TYPE_CGROUP_SKB,
.fixup_map_event_output = { 4 },
.result = ACCEPT,
.retval = 1,
},
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