notes/qemu_monitor_command at master · denis-plotnikov/notes · GitHub

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get cpu's state
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virsh qemu-monitor-command VM_93d73cfa --hmp info cpus

get VM settings
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virsh qemu-monitor-command VM_93d73cfa --hmp info qtree

start gdb server and connect to it
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virsh qemu-monitor-command <vm_name> --hmp gdbserver tcp::<port_number>

then to connect to gdb server do:
gdb
(gdb) set architecture i386:x86-64 [this is needed for proper answer parsing by gdb]
(gdb) target remote 0.0.0.0.:<port_number>

list to serial output all supported sysRQs
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virsh send-key debian-7-x86_64_thiJ6 KEY_LEFTALT KEY_SYSRQ KEY_H


read phisical memory: /128ih  /(number)(format)(size) http://software.viamep.com/qemu-doc.html
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read 128 instructions 16 bit
virsh qemu-monitor-command VM_3440fe0f --hmp xp /128ih 0x9a000