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SubjectRe: [Linux-NTFS-Dev] ntfs OOPS (2.5.63)

On Sat, 8 Mar 2003, Szakacsits Szabolcs wrote:
>
> EFLAGS: 00010282
> eax: f6c0f080 ebx: 0000416d ecx: 00010282 edx: f6c0f0f8
> esi: c040b078 edi: f6c0f0f8 ebp: f6dd1dbc esp: f6dd1db4
> ds: 007b es: 007b ss: 0068
>
> 3c0: b9 06 00 00 00 mov $0x6,%ecx
> ... not important ...
> 3cc: 89 d7 mov %edx,%edi
> 3ce: 89 55 f4 mov %edx,0xfffffff4(%ebp)
> 3d1: f3 a5 repz movsl %ds:(%esi),%es:(%edi)
> 3d3: 8d 50 78 lea 0x78(%eax),%edx
> 3d6: 8b 4d f4 mov 0xfffffff4(%ebp),%ecx
> 3d9: 89 51 18 mov %edx,0x18(%ecx) ## OOPS ##
>
> So %ecx should be %edi-24 = f6c0f0e0, instead it's EFLAGS. Oops [indeed].
> %ebp value is correct, I checked. So it seems a hardware, strong
> radiation or an interrupt that didn't restore ecx.

Actually the "interrupt" did a pushfl and overwrote 0xfffffff4(%ebp).
esp = 0xfffffff4(%ebp). For kernel code the compiler shouldn't have
generated the above code.

Szaka

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