When building the system manually qemu seems to work fine, but in the image generated by travis something seems to be broken. Here is a backtrace of the code that causes the #PF and below are a few steps to debug the failing build:
(gdb) bt
0 0x0000000000459bde in warpPickSmoothPixelsxDeltahyDeltahxDeltavyDeltavsourceMapsmoothingdstShiftInc (nPixels=0, xDeltah=8776656, xDeltah@entry=65537,
yDeltah=518, yDeltah@entry=0, xDeltav=xDeltav@entry=0, yDeltav=yDeltav@entry=65537, sourceMap=sourceMap@entry=106196800, n=n@entry=4,
dstShiftInc=dstShiftInc@entry=-32) at ../../src/plugins/BitBltPlugin/BitBltPlugin.c:8005
1 0x000000000045be22 in warpLoop () at ../../src/plugins/BitBltPlugin/BitBltPlugin.c:7760
2 0x000000000045c1a9 in primitiveWarpBits () at ../../src/plugins/BitBltPlugin/BitBltPlugin.c:5648
3 0x000000000042cf6d in primitiveExternalCall () at ../../spurstack64src/vm/gcc3x-interp.c:68089
4 0x0000000000436d7c in interpret () at ../../spurstack64src/vm/gcc3x-interp.c:5704
5 0x0000000000441075 in interpret () at ../../spurstack64src/vm/gcc3x-interp.c:2455
6 0x0000000000405b4e in nopsys_vm_main (image=, image_length=57484688) at sqMain.c:18
7 0x0000000000402c9c in nopsys_main (magic=, mbi=0x10000) at main.c:37
We need to open the nopsys.kernel file which is in nopsys.vmdk. For that, we need to access the fat partition and copy the file out.
qemu-img convert -f vmdk -O raw nopsys.vmdk nopsys.raw
dd if=nopsys.raw of=fat.raw bs=512 skip=$((2097152/512)) #the start of the fat partition
mcopy -i fat.raw ::nopsys.kernel nopsys.kernel
now we've got the kernel out, we can debug with gdb. In one terminal we run
$>qemu-system-x86_64 -s -boot d -hda nopsys.vmdk -m 512
and in other one we run
$> gdb nopsys.kernel -x qemudbg
where qemudbg has to be copied from nopsys/boot. Within gdb, you'll want to add the directories where sources are stored, using the directory command.
When building the system manually qemu seems to work fine, but in the image generated by travis something seems to be broken. Here is a backtrace of the code that causes the #PF and below are a few steps to debug the failing build:
(gdb) bt
0 0x0000000000459bde in warpPickSmoothPixelsxDeltahyDeltahxDeltavyDeltavsourceMapsmoothingdstShiftInc (nPixels=0, xDeltah=8776656, xDeltah@entry=65537,
1 0x000000000045be22 in warpLoop () at ../../src/plugins/BitBltPlugin/BitBltPlugin.c:7760
2 0x000000000045c1a9 in primitiveWarpBits () at ../../src/plugins/BitBltPlugin/BitBltPlugin.c:5648
3 0x000000000042cf6d in primitiveExternalCall () at ../../spurstack64src/vm/gcc3x-interp.c:68089
4 0x0000000000436d7c in interpret () at ../../spurstack64src/vm/gcc3x-interp.c:5704
5 0x0000000000441075 in interpret () at ../../spurstack64src/vm/gcc3x-interp.c:2455
6 0x0000000000405b4e in nopsys_vm_main (image=, image_length=57484688) at sqMain.c:18
7 0x0000000000402c9c in nopsys_main (magic=, mbi=0x10000) at main.c:37
We need to open the nopsys.kernel file which is in nopsys.vmdk. For that, we need to access the fat partition and copy the file out.
now we've got the kernel out, we can debug with gdb. In one terminal we run
and in other one we run
where qemudbg has to be copied from nopsys/boot. Within gdb, you'll want to add the directories where sources are stored, using the
directory
command.