| Message ID | 1302383601-9955-1-git-send-email-michael@walle.cc |
|---|---|
| State | New |
| Headers | show |
On 2011-04-09 23:13, Michael Walle wrote: > There is a bug in nvidia's binary GPU driver, which causes a segmentation > fault if linked to libGL. > > Signed-off-by: Michael Walle <michael@walle.cc> > --- > configure | 1 + > 1 files changed, 1 insertions(+), 0 deletions(-) > > diff --git a/configure b/configure > index 2bb3faa..be40a31 100755 > --- a/configure > +++ b/configure > @@ -177,6 +177,7 @@ spice="" > rbd="" > smartcard="" > smartcard_nss="" > +opengl="no" > > # parse CC options first > for opt do I stumbled over this issue as well, but was unhappy about simply disabling OpenGL without understanding what goes wrong. Still, I can't provide a better solution yet, just some maybe helpful insights: ... 00908000-0134f000 rw-p 00000000 00:00 0 [heap] 41944000-43944000 rwxp 00000000 00:00 0 ... That's an extract of /proc/$QEMU_PID/maps with -lGL, and below without it: 00908000-010bd000 rw-p 00000000 00:00 0 010bd000-010be000 rwxp 00000000 00:00 0 010be000-01335000 rw-p 00000000 00:00 0 [heap] 40514000-42514000 rwxp 00000000 00:00 0 IOW, we are lacking the executable code_gen_prologue page. This problem behaves like a heisenbug, ie. it disappears here when I run qemu in gdb or under strace. But ftrace confirms that the qemu process issues mprotect to make the whole heap non-executable after setting up that TCG buffer - it just doesn't tell me which part of qemu is responsible for this. Note that I'm still forced to use this wonderful binary nvidia stuff. Anyone any ideas? Jan
On Sat, Apr 09, 2011 at 11:13:20PM +0200, Michael Walle wrote: > There is a bug in nvidia's binary GPU driver, which causes a segmentation > fault if linked to libGL. > > Signed-off-by: Michael Walle <michael@walle.cc> > --- > configure | 1 + > 1 files changed, 1 insertions(+), 0 deletions(-) Thanks, applied. > diff --git a/configure b/configure > index 2bb3faa..be40a31 100755 > --- a/configure > +++ b/configure > @@ -177,6 +177,7 @@ spice="" > rbd="" > smartcard="" > smartcard_nss="" > +opengl="no" > > # parse CC options first > for opt do > -- > 1.7.2.3 > > >
diff --git a/configure b/configure index 2bb3faa..be40a31 100755 --- a/configure +++ b/configure @@ -177,6 +177,7 @@ spice="" rbd="" smartcard="" smartcard_nss="" +opengl="no" # parse CC options first for opt do
There is a bug in nvidia's binary GPU driver, which causes a segmentation fault if linked to libGL. Signed-off-by: Michael Walle <michael@walle.cc> --- configure | 1 + 1 files changed, 1 insertions(+), 0 deletions(-)