bjoto

// https://lwn.net/Articles/679137/
// make csum && ./csum
// cc     csum.c   -o csum
// generic: ffe3 65507
// x86    : ffffffe3 -29


#include <stdio.h>

typedef unsigned int __wsum;

bjoto

So, e.g., this program ebpf program is jited to (scroll down)

test_pkt_access.o:	file format ELF64-BPF

Disassembly of section test1:
process:
       0:	b7 00 00 00 02 00 00 00 	r0 = 2
       1:	61 12 50 00 00 00 00 00 	r2 = *(u32 *)(r1 + 80)
       2:	61 11 4c 00 00 00 00 00 	r1 = *(u32 *)(r1 + 76)
       3:	bf 13 00 00 00 00 00 00 	r3 = r1