[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