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Since the Guest is in ring 1, it can't read the debug registers: doing so gives a number of nasty messages: (gdb) run Starting program: /bin/sleep [ 31.170230] general protection fault: 0000 [#1] SMP [ 31.170230] Modules linked in: [ 31.170230] CPU: 0 PID: 2678 Comm: sleep Not tainted 3.11.0+ #64 [ 31.170230] task: cc5c09b0 ti: cc79c000 task.ti: cc79c000 [ 31.170230] EIP: 0061:[<c01333d8>] EFLAGS: 00000097 CPU: 0 [ 31.170230] EIP is at native_get_debugreg+0x58/0x70 [ 31.170230] EAX: 00000006 EBX: cc79dfb4 ECX: b7fff918 EDX: 00000000 [ 31.170230] ESI: cc5c09b0 EDI: 00000000 EBP: cc79df84 ESP: cc79df84 [ 31.170230] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0069 [ 31.170230] CR0: 00000008 CR2: 081ba69a CR3: 0e2f2000 CR4: 00000000 Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> |
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.. | ||
boot | ||
configs | ||
crypto | ||
ia32 | ||
include | ||
kernel | ||
kvm | ||
lguest | ||
lib | ||
math-emu | ||
mm | ||
net | ||
oprofile | ||
pci | ||
platform | ||
power | ||
realmode | ||
syscalls | ||
tools | ||
um | ||
vdso | ||
video | ||
xen | ||
.gitignore | ||
Kbuild | ||
Kconfig | ||
Kconfig.cpu | ||
Kconfig.debug | ||
Makefile | ||
Makefile.um | ||
Makefile_32.cpu |