Code isn't generated: open-vm-tools/lib/backdoor/backdoorGcc64.c Backdoor_InOut(Backdoor_proto *myBp) // IN/OUT { uint64 dummy;
__asm__ __volatile__( #ifdef __APPLE__ /* * Save %rbx on the stack because the Mac OS GCC doesn't want us to * clobber it - it erroneously thinks %rbx is the PIC register. * (Radar bug 7304232) */ "pushq %%rbx" "\n\t" #endif "pushq %%rax" "\n\t" "movq 40(%%rax), %%rdi" "\n\t" "movq 32(%%rax), %%rsi" "\n\t" "movq 24(%%rax), %%rdx" "\n\t" "movq 16(%%rax), %%rcx" "\n\t" "movq 8(%%rax), %%rbx" "\n\t" "movq (%%rax), %%rax" "\n\t" "inl %%dx, %%eax" "\n\t" /* NB: There is no inq instruction */ "xchgq %%rax, (%%rsp)" "\n\t" "movq %%rdi, 40(%%rax)" "\n\t" "movq %%rsi, 32(%%rax)" "\n\t" "movq %%rdx, 24(%%rax)" "\n\t" "movq %%rcx, 16(%%rax)" "\n\t" "movq %%rbx, 8(%%rax)" "\n\t" "popq (%%rax)" "\n\t" #ifdef __APPLE__ "popq %%rbx" "\n\t" #endif : "=a" (dummy) : "0" (myBp) /* * vmware can modify the whole VM state without the compiler knowing * it. So far it does not modify EFLAGS. --hpreg */ : #ifndef __APPLE__ /* %rbx is unchanged at the end of the function on Mac OS. */ "rbx", #endif "rcx", "rdx", "rsi", "rdi", "memory" ); } Last functional change in 2011, so it isn't a change to the crashing code itself. The failing instruction is the port-io hypercall See: http://www.felixcloutier.com/x86/IN.html It does a 32bit read to EAX from source port defined in DX. DX is lowest 16 bit of RDX We have RDX from the crash: rdx 0x7700005658 511101130328 It is that The error being "dx" suggests that the source port would be wrong? That would be 0x5658 or in decimal 22104 I don't know the VMware Hipercall interface - is that source port reasonable? That is not getting us anywhere without help I assume :-/ I'll post this reading of the call to the upstream bug. The question is what happens on this hypercall and/or the call to it that triggers the bug? I'm afraid we have to wait for a reproducer due to upstream work on it or one of the affected chiming in here. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1791220 Title: increased crash rate since 10.3 upgrade is available To manage notifications about this bug go to: https://bugs.launchpad.net/open-vm-tools/+bug/1791220/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs