trace_printk(____fmt, sizeof(____fmt), ##__VA_ARGS__); \ }) #endif The program can then use the macro naturally like printk("skb len:%u\n", skb->len); . The output will then be wri�en to the trace pipe and value structures. For example, BTF in combina�on with BPF maps and the BPF_ANNOTATE_KV_PAIR() macro from iproute2 will result in the following dump ( test_xdp_noinline.o from kernel sel�ests): # cat BPF_ANNOTATE_KV_PAIR(ctl_array, __u32, struct ctl_value); [...] The BPF_ANNOTATE_KV_PAIR() macro forces a map-specific ELF sec�on containing an empty key and value, this enables the iproute2 BPF

trace_printk(____fmt, sizeof(____fmt), ##__VA_ARGS__); \ }) #endif The program can then use the macro naturally like printk("skb len:%u\n", skb->len);. The output will then be written to the trace pipe and value structures. For example, BTF in combination with BPF maps and the BPF_ANNOTATE_KV_PAIR() macro from iproute2 will result in the following dump (test_xdp_noinline.o from kernel selftests): # cat BPF_ANNOTATE_KV_PAIR(ctl_array, __u32, struct ctl_value); [...] The BPF_ANNOTATE_KV_PAIR() macro forces a map-specific ELF section containing an empty key and value, this enables the iproute2 BPF

trace_printk(____fmt, sizeof(____fmt), ##__VA_ARGS__); \ }) #endif The program can then use the macro naturally like printk("skb len:%u\n", skb->len);. The output will then be written to the trace pipe and value structures. For example, BTF in combination with BPF maps and the BPF_ANNOTATE_KV_PAIR() macro from iproute2 will result in the following dump (test_xdp_noinline.o from kernel selftests): # cat BPF_ANNOTATE_KV_PAIR(ctl_array, __u32, struct ctl_value); [...] The BPF_ANNOTATE_KV_PAIR() macro forces a map-specific ELF section containing an empty key and value, this enables the iproute2 BPF

trace_printk(____fmt, sizeof(____fmt), ##__VA_ARGS__); \ }) #endif The program can then use the macro naturally like printk("skb len:%u\n", skb->len);. The output will then be written to the trace pipe and value structures. For example, BTF in combination with BPF maps and the BPF_ANNOTATE_KV_PAIR() macro from iproute2 will result in the following dump (test_xdp_noinline.o from kernel selftests): # cat BPF_ANNOTATE_KV_PAIR(ctl_array, __u32, struct ctl_value); [...] The BPF_ANNOTATE_KV_PAIR() macro forces a map-specific ELF section containing an empty key and value, this enables the iproute2 BPF

trace_printk(____fmt, sizeof(____fmt), ##__VA_ARGS__); \ }) #endif The program can then use the macro naturally like printk("skb len:%u\n", skb->len);. The output will then be written to the trace pipe and value structures. For example, BTF in combination with BPF maps and the BPF_ANNOTATE_KV_PAIR() macro from iproute2 will result in the following dump (test_xdp_noinline.o from kernel selftests): # cat BPF_ANNOTATE_KV_PAIR(ctl_array, __u32, struct ctl_value); [...] The BPF_ANNOTATE_KV_PAIR() macro forces a map-specific ELF section containing an empty key and value, this enables the iproute2 BPF

trace_printk(____fmt, sizeof(____fmt), ##__VA_ARGS__); \ }) #endif The program can then use the macro naturally like printk("skb len:%u\n", skb->len);. The output will then be written to the trace pipe and value structures. For example, BTF in combination with BPF maps and the BPF_ANNOTATE_KV_PAIR() macro from iproute2 will result in the following dump (test_xdp_noinline.o from kernel selftests): # cat BPF_ANNOTATE_KV_PAIR(ctl_array, __u32, struct ctl_value); [...] The BPF_ANNOTATE_KV_PAIR() macro forces a map-specific ELF section containing an empty key and value, this enables the iproute2 BPF

trace_printk(____fmt, sizeof(____fmt), ##__VA_ARGS__); \ }) #endif The program can then use the macro naturally like printk("skb len:%u\n", skb->len);. The output will then be written to the trace pipe and value structures. For example, BTF in combination with BPF maps and the BPF_ANNOTATE_KV_PAIR() macro from iproute2 will result in the following dump (test_xdp_noinline.o from kernel selftests): # cat BPF_ANNOTATE_KV_PAIR(ctl_array, __u32, struct ctl_value); [...] The BPF_ANNOTATE_KV_PAIR() macro forces a map-specific ELF section containing an empty key and value, this enables the iproute2 BPF