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<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [llvmpipe] SEGV in sse2_has_daz on ancient Pentium4-M"
href="https://bugs.freedesktop.org/show_bug.cgi?id=87658">87658</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[llvmpipe] SEGV in sse2_has_daz on ancient Pentium4-M
</td>
</tr>
<tr>
<th>Product</th>
<td>Mesa
</td>
</tr>
<tr>
<th>Version</th>
<td>10.3
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86 (IA32)
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Component</th>
<td>Other
</td>
</tr>
<tr>
<th>Assignee</th>
<td>mesa-dev@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>chris@edesix.com
</td>
</tr></table>
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<div>
<pre>Hi,
I'm trying to run some modern OpenGL 3.3 code on an ancient machine. When I set
LIBGL_ALWAYS_SOFTWARE the llvmpipe driver seems to be chosen, but it raises a
segv in sse2_has_daz()...
I'm running Fedora mesa-*-10.3.3-1.20141110.fc20.i686
Program received signal SIGSEGV, Segmentation fault.
sse2_has_daz () at util/u_cpu_detect.c:285
285 __asm __volatile ("fxsave %0" : "+m" (fxarea));
(gdb) bt
#0 sse2_has_daz () at util/u_cpu_detect.c:285
#1 0xb72d4805 in util_cpu_detect () at util/u_cpu_detect.c:378
#2 0xb75c9407 in llvmpipe_create_screen (winsys=winsys@entry=0x8141a98) at
lp_screen.c:555
#3 0xb7006b38 in sw_screen_create_named (driver=<optimized out>,
winsys=0x8141a98) at
../../../../src/gallium/auxiliary/target-helpers/inline_sw_helper.h:30
#4 sw_screen_create (winsys=0x8141a98) at
../../../../src/gallium/auxiliary/target-helpers/inline_sw_helper.h:57
#5 drisw_create_screen (lf=lf@entry=0xb779d744 <drisw_lf>) at
../../../../src/gallium/auxiliary/target-helpers/inline_sw_helper.h:84
#6 0xb727507e in drisw_init_screen (sPriv=0x812eac8) at drisw.c:363
#7 0xb726ffc6 in driCreateNewScreen2 (scrn=scrn@entry=0, fd=fd@entry=-1,
extensions=extensions@entry=0xb7b7d378 <loader_extensions>,
driver_extensions=driver_extensions@entry=0xb779d724
<galliumsw_driver_extensions>, driver_configs=driver_configs@entry=0xbfffed30,
data=data@entry=0x81311a0) at dri_util.c:159
#8 0xb7270108 in driSWRastCreateNewScreen2 (scrn=0, extensions=0xb7b7d378
<loader_extensions>, driver_extensions=0xb779d724
<galliumsw_driver_extensions>, driver_configs=0xbfffed30,
data=0x81311a0) at dri_util.c:214
#9 0xb7b0bc78 in driswCreateScreen (screen=0, priv=0x812ebb0) at
drisw_glx.c:686
#10 0xb7ae53f9 in AllocAndFetchScreenConfigs (priv=0x812ebb0, dpy=0x8120a38) at
glxext.c:796
#11 __glXInitialize (dpy=dpy@entry=0x8120a38) at glxext.c:902
#12 0xb7ae166e in GetGLXPrivScreenConfig (dpy=dpy@entry=0x8120a38,
scrn=scrn@entry=0, ppriv=ppriv@entry=0xbfffedd8, ppsc=ppsc@entry=0xbfffeddc) at
glxcmds.c:172
#13 0xb7ae1fe7 in GetGLXPrivScreenConfig (ppsc=0xbfffeddc, ppriv=0xbfffedd8,
scrn=0, dpy=0x8120a38) at glxcmds.c:168
#14 glXChooseVisual (dpy=0x8120a38, screen=0, attribList=0xbfffef34) at
glxcmds.c:1249
#15 0xb7c47491 in X11_GL_GetVisual (_this=_this@entry=0x8120310,
display=display@entry=0x8120a38, screen=screen@entry=0) at
/usr/src/debug/SDL2-2.0.3/src/video/x11/SDL_x11opengl.c:525
#16 0xb7c4770e in X11_GL_InitExtensions (_this=0x8120310) at
/usr/src/debug/SDL2-2.0.3/src/video/x11/SDL_x11opengl.c:323
#17 X11_GL_LoadLibrary (_this=0x8120310, path=<optimized out>) at
/usr/src/debug/SDL2-2.0.3/src/video/x11/SDL_x11opengl.c:218
#18 0xb7c3a16f in SDL_GL_LoadLibrary_REAL (path=path@entry=0x0) at
/usr/src/debug/SDL2-2.0.3/src/video/SDL_video.c:2401
#19 0xb7c3bfd8 in SDL_CreateWindow_REAL (title=title@entry=0xb7c612b2 "OpenGL
test", x=x@entry=-32, y=y@entry=-32, w=w@entry=32, h=h@entry=32,
flags=flags@entry=10)
at /usr/src/debug/SDL2-2.0.3/src/video/SDL_video.c:1240
#20 0xb7c3bcb1 in ShouldUseTextureFramebuffer () at
/usr/src/debug/SDL2-2.0.3/src/video/SDL_video.c:192
#21 SDL_VideoInit_REAL (driver_name=driver_name@entry=0x0) at
/usr/src/debug/SDL2-2.0.3/src/video/SDL_video.c:506
#22 0xb7b8aad4 in SDL_InitSubSystem_REAL (flags=16416) at
/usr/src/debug/SDL2-2.0.3/src/SDL.c:173
#23 0xb7bbe09d in SDL_Init (a=32) at
/usr/src/debug/SDL2-2.0.3/src/dynapi/SDL_dynapi_procs.h:89
$ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Mobile Intel(R) Pentium(R) 4 - M CPU 1.80GHz
stepping : 7
microcode : 0x39
cpu MHz : 1200.000
cache size : 512 KB
fdiv_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat
pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe pebs bts cid
bogomips : 2392.96
clflush size : 64
cache_alignment : 128
address sizes : 36 bits physical, 32 bits virtual
power management:</pre>
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