[Qemu-devel] Cirrus VGA regression bug

[Qemu-devel] Cirrus VGA regression bug

[Alexandre CABROL PERALES]

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Hi everybody i try to use Windows NT 4.0
with qemu.

I tested with qemu 0.10.6 and vm crash on screen resolution resize
(switch from 640x480 16bits to 1280x1024 65536).

I made the same test with qemu 0.9.1 and it works well.
find attached gdb qemu 0.10.6 trace about cirrus crash.

please can you fix it ?
- --
Alexandre CABROL PERALES
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Ingenieur Securite des Systemes d'Information
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[-- Attachment #2: cirrus_vga-qemu-0.10.6.trace --]
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Program received signal SIGFPE, Arithmetic exception.
[Switching to Thread 0x7f48c91566e0 (LWP 31712)]
0x000000000045b2d2 in cirrus_bitblt_start (s=0x237b240) at /opt/qemu-0.10.6/hw/cirrus_vga.c:733
733	    sx = (src % ABS(s->cirrus_blt_srcpitch)) / depth;

Re: [Qemu-devel] Cirrus VGA regression bug

[Alexandre CABROL PERALES]

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i changed code with code from 0.9.1
from line 733 to 736:
    /* extra x, y */
    sx = (src % (width * depth)) / depth;
    sy = (src / (width * depth));
    dx = (dst % (width *depth)) / depth;
    dy = (dst / (width * depth));

qemu doesn't crash but i still have only winnt background screen (seems
refresh on display doesn't work well).



Alexandre CABROL PERALES a écrit :
> Hi everybody i try to use Windows NT 4.0
> with qemu.
> 
> I tested with qemu 0.10.6 and vm crash on screen resolution resize
> (switch from 640x480 16bits to 1280x1024 65536).
> 
> I made the same test with qemu 0.9.1 and it works well.
> find attached gdb qemu 0.10.6 trace about cirrus crash.
> 
> please can you fix it ?

- --
Alexandre CABROL PERALES
- --
Ingenieur Securite des Systemes d'Information
Mob. :    06.98.82.03.06
Mail :    alexandre.cabrol@artal.fr
Key fingerprint = 1E6B B8DF 5001 A6A8 E057  9D31 7B3B EAB1 4AE4 8953
- --
ARTAL Technologies

Rue Pierre-Gilles de Gennes
Ens."La Rue", Bat. 9, BP 38138
31681 Labege cedex

Tel. :    05.61.00.39.30
Fax :     05.61.00.20.43


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