Re: [ros-dev] SVN Trunk Dead

[Alex Ionescu]

Alex Ionescu wrote:

>   Hi,
>
>  Booting ROS doesn't work lately...... I've debugged the problem and 
>  found two likely causes:
>
>  1) RtlFormatCurrentUserKeyPath calls NtQueryInformationToken with a 
>  Kernel Mode address while in user-mode
>  2) Something is wrong with setting the current mode (in syscall.S), 
>  and so MmCopySafe... thinks that teh current mode is user while the 
>  buffer is kernel:
>
>  (mm/mm.c:60) 1, de1c7cf8
>
>  Note that 1 == UserMode while the buffer is kernel-mode.
>
>  It's late here so I don't have time to look into it with more detail.
>
>  Best regards,
>  Alex Ionescu
>  _______________________________________________ 
    /* Restore the old previous mode */
    popl %ebx                                                          
// + 0x2C
    int $3
    movb %bl, %ss:KTHREAD_PREVIOUS_MODE(%esi)

ebx = 0x300.
Nuff said, something is wrong when popping from the stack. It's 2AM so 
time to sleep, but this should take a second to fix for anyone.

bEst regards,
Alex Ionescu