db> bt
Tracing pid 12 tid 100123 td 0xfffff8007213d500
vga_bitblt_one_text_pixels_block() at
vga_bitblt_one_text_pixels_block+0x135/frame 0xfffffe0350518030
vga_bitblt_text() at vga_bitblt_text+0xd0/frame 0xfffffe0350518090
vt_flush() at vt_flush+0x2cc/frame 0xfffffe03505180d0
termcn_cnputc() at termcn_cnputc+0x108/frame 0xfffffe0350518110
cnputc() at cnputc+0x6d/frame 0xfffffe0350518140
cnputs() at cnputs+0xd8/frame 0xfffffe0350518160
putchar() at putchar+0x15e/frame 0xfffffe03505181e0
kvprintf() at kvprintf+0x119/frame 0xfffffe03505182f0
_vprintf() at _vprintf+0x8d/frame 0xfffffe03505183d0
printf() at printf+0x53/frame 0xfffffe0350518430
xpt_announce_periph() at xpt_announce_periph+0x62/frame 0xfffffe0350518480
cddone() at cddone+0x24b/frame 0xfffffe0350518a40
xpt_done_process() at xpt_done_process+0x78a/frame 0xfffffe0350518a80
xpt_done_direct() at xpt_done_direct+0x3f/frame 0xfffffe0350518ab0
ahci_ch_intr_direct() at ahci_ch_intr_direct+0x155/frame 0xfffffe0350518b00
ahci_intr_one() at ahci_intr_one+0x2d/frame 0xfffffe0350518b20
intr_event_execute_handlers() at intr_event_execute_handlers+0x20f/frame
0xfffffe0350518b60
ithread_loop() at ithread_loop+0xc6/frame 0xfffffe0350518bb0
fork_exit() at fork_exit+0x85/frame 0xfffffe0350518bf0
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0350518bf0
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---
db> c
[ thread pid 12 tid 100123 ]
Stopped at      vga_bitblt_one_text_pixels_block+0x135: movl
(%rax,%r13,4),%ebx
db> c
[ thread pid 12 tid 100123 ]
Stopped at      vga_bitblt_one_text_pixels_block+0x135: movl
(%rax,%r13,4),%ebx
db> c
[ thread pid 12 tid 100123 ]
Stopped at      vga_bitblt_one_text_pixels_block+0x135: movl
(%rax,%r13,4),%ebx
db> c
[ thread pid 12 tid 100123 ]
Stopped at      vga_bitblt_one_text_pixels_block+0x135: movl
(%rax,%r13,4),%ebx
db> dump
Cannot dump: no dump device specified.
db> call doadump
= 0x6
db> reset