db{6}> bt/a 0xffff0009de6bdb00
trace: pid 1322 lid 1322 at tf 0xffffc000e9daf740 (in pcb)
---- switchframe 0xffffc000e9daf740 (304 bytes) ----
   x19=ffff0009de6bdb00,    x20=ffffc00000e48180
   x21=ffff0009dedc8a80,    x22=ffffc00000b241c0
   x23=0000000000000000,    x24=0000000000000003
   x25=0000000000000001,    x26=ffffc000011b9808
   x27=0000000000000041,    x28=0000ffffff997618
fp=x29=ffffc000e9daf870, lr=x30=ffffc000005705f0
------------------------------------------------
fp ffffc000e9daf870 mi_switch() at ffffc000005705ec netbsd:mi_switch+0x21c
fp ffffc000e9daf8e0 sleepq_block() at ffffc0000056cba4 netbsd:sleepq_block+0xa4
fp ffffc000e9daf920 cv_wait() at ffffc0000052b4b4 netbsd:cv_wait+0x44
fp ffffc000e9daf950 xc_unicast() at ffffc000005b3eb8 netbsd:xc_unicast+0xa8
fp ffffc000e9daf9a0 percpu_foreach_xcall() at ffffc000005a0364 netbsd:percpu_foreach_xcall+0x54
fp ffffc000e9dafa00 if_stats_to_if_data() at ffffc0000066dce0 netbsd:if_stats_to_if_data+0x60
fp ffffc000e9dafa30 if_export_if_data() at ffffc00000657254 netbsd:if_export_if_data+0x14
fp ffffc000e9dafa50 rt_ifmsg() at ffffc00000692a4c netbsd:rt_ifmsg+0x8c
fp ffffc000e9dafb80 if_up_locked() at ffffc00000650198 netbsd:if_up_locked+0x58
fp ffffc000e9dafba0 doifioctl() at ffffc000006566ac netbsd:doifioctl+0x66c
fp ffffc000e9dafd40 sys_ioctl() at ffffc000005bb21c netbsd:sys_ioctl+0x3cc
fp ffffc000e9dafe20 syscall() at ffffc000000b1a3c netbsd:syscall+0x19c
tf ffffc000e9dafed0 el0_trap() at ffffc000000b4ff0 netbsd:el1_trap_exit+0x68
---- trapframe 0xffffc000e9dafed0 (304 bytes) ----
    pc=0000f5fa50f28640,   spsr=0000000000000000
   esr=0000000056000036,    far=0000f5fa50f42148
    x0=0000000000000005,     x1=0000000080906910
    x2=0000ffffff987478,     x3=0000000000000090
    x4=0000ffffff987260,     x5=0000000000000000
    x6=0000000000000000,     x7=0000000000000000
    x8=0000000000000000,     x9=6168207365636166
   x10=cccccccccccccccd,    x11=0101010101010101
   x12=0000000000001230,    x13=00000000fffffffb
   x14=8f5c28f5c28f5c29,    x15=00a3d70a3d70a3d6
   x16=0000000001c9d020,    x17=0000f5fa50f2863c
   x18=00000000000007e6,    x19=0000000080906910
   x20=0000000000000005,    x21=0000ffffff987408
   x22=0000ffffff997618,    x23=0000000000000010
   x24=0000000000000090,    x25=0000ffffff987478
   x26=0000000001c79000,    x27=0000ffffff997860
   x28=0000ffffff997618, fp=x29=0000ffffff977260
lr=x30=0000000001c5b900,     sp=0000ffffff977260
------------------------------------------------
db{6}>