XV6 registers

 pc       000000000000100c
 mhartid  0000000000000000
 mstatus  0000000000000000
 mip      0x0
 mie      0000000000000000
 mideleg  0000000000000000
 medeleg  0000000000000000
 mtvec    0000000000000000
 mepc     0000000000000000
 mcause   0000000000000000
 x0/zero 0000000000000000 x1/ra 0000000000000000 x2/sp 0000000000000000 x3/gp 0000000000000000
 x4/tp 0000000000000000 x5/t0 0000000000001000 x6/t1 0000000000000000 x7/t2 0000000000000000
 x8/s0 0000000000000000 x9/s1 0000000000000000 x10/a0 0000000000000000 x11/a1 0000000000001020
 x12/a2 0000000000000000 x13/a3 0000000000000000 x14/a4 0000000000000000 x15/a5 0000000000000000
 x16/a6 0000000000000000 x17/a7 0000000000000000 x18/s2 0000000000000000 x19/s3 0000000000000000
 x20/s4 0000000000000000 x21/s5 0000000000000000 x22/s6 0000000000000000 x23/s7 0000000000000000
 x24/s8 0000000000000000 x25/s9 0000000000000000 x26/s10 0000000000000000 x27/s11 0000000000000000
 x28/t3 0000000000000000 x29/t4 0000000000000000 x30/t5 0000000000000000 x31/t6 0000000000000000