VirtualBox archive - heldersrvio/PureDarwin GitHub Wiki
as of 2011 January: Virtualbox runs with PureDarwin nano **please see: **http://www.puredarwin.org/developers/virtualbox ** ** ** ** the following info is kept here for historical reasons! ** ** ** ** (Pure)Darwin 9 guest OS not supported or it doesn't seem to be trivial to make it works. No problem concerning loading the bootloader. Latest versions tested:
- VirtualBox 3.0.2 on Mac OS X
- VirtualBox 3.0.6 on Windows XP 32 bits
** ** Problem: black screen at kernel loading (just after kexts decompression), framebuffer unsupported? Settings {style="text-align:left"}
Set up "OS Type" variable as a "FreeBSD" machine. VT-x/AMD-v is a must. (ACPI must be disabled) PAE/NX seems to be needed^1^ and enabled^2^ (please add more text)
"Physical addresses greater than 32 bits are supported: extended page table entry formats, an extra level in the page translation tables is defined, 2-MByte pages are supported instead of 4 Mbyte pages if PAE bit is 1. The actual number of address bits beyond 32 is not defined, and is implementation specific." said Intel MacCPUID.app. Boot
-v is not needed since it is enabled by default. (please add more text)
Note: Pressing ? + *Enter *doesn't give any output.
?video works in booter and returns:
Note: Passing kernel flag "Graphics Mode"="<value>" also seems to work.
A bit obscure... Please let us know if you know about.
Then it fails, attempting to find SMBIOS table.
After using booter boot-132_dfe_r146 (instead of dfe_r28 version) from David Elliott, another problematic error is raised about determination of CPU:FSB multiplier (0 is found...).
Pressing 'y' leads irremediably to a (resized) blank screen, full cpu load, and a critical error forcing to poweroff the vm.
See corresponding VirtualBox log of pressing 'y':
00:00:03.572 Display::handleDisplayResize(): uScreenId = 0, pvVRAM=184d9000 w=640 h=480 bpp=32 cbLine=0xA00 00:00:05.906 Guest Log: Key pressed: 0086 00:00:05.942 Display::handleDisplayResize(): uScreenId = 0, pvVRAM=00000000 w=720 h=400 bpp=0 cbLine=0x0 00:00:09.600 Guest Log: Key pressed: 002E
Please, let us know if you have a solution.
Other attempts have been made, combining xnu-dev kernel (Voodoo BETA 2b ) and chameleon bootloader (v1.0.11). We can bypass the error above about CPU:FSB multiplier with the boot argument busratio=...
With ACPI enabled in VirtualBox, the vm hangs at "Local APIC version not 0x14 as expected":
Without ACPI, it complains about and irremediably lead to a kernel panic.
Problem: "Unable to find SMBIOS table" Solution 0: So, need another BIOS (with correct offset)?
Another solution would be to use the host SMBIOS table, or a copy of it. See http://www.virtualbox.org/ticket/1751 for more information. Solution 1: It's still remain possible to modify and recompile the VirtualBox sources in order to give a correct SMBIOS. See VirtualBox/src/VBox/Devices/PC/DevPcBios.cpp Solution 2: use another kernel (xnu-dev) and/or another bootloader (chameleon)
"The processor provides a variety of machine specific registers (accessed via the RDMSR and WRMSR instructions) that are used to control and report on processor performance. Virtually all MSRs handle system related functions and are not accessible to an application program. One exception to this rule is the time-stamp counter." said Intel MacCPUID.app.
According to Wikipedia: "The clock multiplier (or CPU multiplier or bus/core ratio) is the ratio of the internal CPU clock rate to the frequency of its external address/data bus, today often termed front side bus(FSB). A system with a CPU multiplier of 10x will have its CPU execute 10 complete cycles for every cycle of its FSB. For example, a system with an FSB running at 133 MHz and a clock multiplier of 10x, the CPU will run at 1.33 GHz."
CPU model seems OK:
00:00:02.889 Full Name: Intel(R) Core(TM)2 CPU T7400 @ 2.16GHz
- FSB: 667 Mhz
- Multiplier: 13x
The highlighted line could explain why suddenly the screen is auto resized, and consequently why the screen goes blank.
00:00:09.666 Guest Log: BIOS: Booting from CD-ROM... 00:00:58.579 Display::handleDisplayResize(): uScreenId = 0, pvVRAM=184d9000 w=1024 h=768 bpp=32 cbLine=0x1000 00:00:58.608 VERR_REM_TOO_MANY_TRAPS -> uTrap=d error=6a next_eip=ffe01890 eip=ffe01890 cr2=ffe01890 00:00:58.608 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! 00:00:58.608 !! 00:00:58.608 !! Guru Meditation -2304 (VERR_REM_TOO_MANY_TRAPS) 00:00:58.608 !! 00:00:58.608 !! 00:00:58.608 !! {mappings, <NULL>} 00:00:58.608 !! 00:00:58.608
Footnotes
^1^Why PAE/NX seems to be needed?
^2^How to enable PAE/NX?
Via command-line, assuming PureDarwin is the name of your vm:
/Applications/VirtualBox.app/Contents/MacOS/VBoxManage modifyvm PureDarwin -pae on
Via gui, a simple checkbox in the settings.
Ressources
http://alex.csgraf.de/self/?part/projects&folder/Qemu%20OSX&type/&project/projects¶meters/id=Qemu%20OSX/qemu http://www.virtualbox.org/ticket/1071 http://www.virtualbox.org/ticket/1751 (Allow SMBIOS information to be copied from host) http://softwarecommunity.intel.com/articles/eng/1107.htm (MacCPUID.app)
http://code.google.com/p/xnu-dev / (A fork of the XNU kernel)
The goal of this project is to make Darwin more usable by providing an installation ISO, documentation, and add-on software. You are welcome to join #puredarwin on irc.freenode.net or the Gitter chat if you would like to join PureDarwin development and to add to this site.
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