Hi, I just tried to boot coreinfo in qemu-q35, and it got an NMI exception after a second:
> Run img/coreinfo > Calling addr 0x00100000 > <coreinfo starts and shows information> > Non-Maskable-Interrupt Exception > Error code: n/a > EIP: 0x00104175 > CS: 0x0010 > EFLAGS: 0x00000093 > EAX: 0x52797503 > ECX: 0x00000000 > EDX: 0x00000001 > EBX: 0x5a769ba0 > ESP: 0x0015917c > EBP: 0x0000011a > ESI: 0x31ef541a > EDI: 0x00000001 > DS: 0x0018 > ES: 0x0018 > SS: 0x0018 > FS: 0x0018 > GS: 0x0018 > Dumping stack: > 0x159360: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 > 00000000 > 0x159340: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 > 00000000 > 0x159320: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 > 00000000 > 0x159300: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 > 00000000 > 0x1592e0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 > 00000000 > 0x1592c0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 > 00000000 > 0x1592a0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 > 00000000 > 0x159280: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 > 00000000 > 0x159260: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 > 00000000 > 0x159240: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 > 00000000 > 0x159220: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 > 00000000 > 0x159200: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 > 00000000 > 0x1591e0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 > 00000000 > 0x1591c0: 00000000 00000000 00100051 00006fb4 00000000 00000000 00000000 > 00000000 > 0x1591a0: 001591d0 001591c0 ffe27904 001020d0 0010546b 00104d07 00104f88 > 001020d0 > 0x159180: 00006fb4 001591d0 001591a8 0010209c 000001f4 00000000 001591d0 > 00006fb4 > 0x159160: 00000000 001591d0 00006fb4 001591d0 00104175 00000010 00000093 > 001591d0 This happens reliably both with and without SeaBIOS and in both qemu-system-i386 and qemu-system-x86_64 (version 2.5.0). The coreinfo application code is apparently irrelevant: I replaced coreinfo's main() with a printf and an endless loop and still get the same result. What could be causing this? Jonathan
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