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doc: Refresh URLs in the qemu-tech documentation 

The TwoOStwo and Willows page seem to have disappeared completely,
and also some of the other links were not pointing to the right
locations anymore.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1443173916-8895-1-git-send-email-thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Thomas Huth 2015-09-25 11:38:36 +02:00 committed by Paolo Bonzini
parent 717171bd20
commit 8e9620a683
1 changed files with 32 additions and 45 deletions
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77
qemu-tech.texi
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@ -320,7 +320,7 @@ SH4
@node QEMU compared to other emulators
@section QEMU compared to other emulators
Like bochs [3], QEMU emulates an x86 CPU. But QEMU is much faster than
Like bochs [1], QEMU emulates an x86 CPU. But QEMU is much faster than
bochs as it uses dynamic compilation. Bochs is closely tied to x86 PC
emulation while QEMU can emulate several processors.
@ -333,25 +333,25 @@ than QEMU (in particular it does register allocation) but it is closely
tied to an x86 host and target and has no support for precise exceptions
and system emulation.
EM86 [4] is the closest project to user space QEMU (and QEMU still uses
EM86 [3] is the closest project to user space QEMU (and QEMU still uses
some of its code, in particular the ELF file loader). EM86 was limited
to an alpha host and used a proprietary and slow interpreter (the
interpreter part of the FX!32 Digital Win32 code translator [5]).
interpreter part of the FX!32 Digital Win32 code translator [4]).
TWIN [6] is a Windows API emulator like Wine. It is less accurate than
Wine but includes a protected mode x86 interpreter to launch x86 Windows
executables. Such an approach has greater potential because most of the
Windows API is executed natively but it is far more difficult to develop
because all the data structures and function parameters exchanged
TWIN from Willows Software was a Windows API emulator like Wine. It is less
accurate than Wine but includes a protected mode x86 interpreter to launch
x86 Windows executables. Such an approach has greater potential because most
of the Windows API is executed natively but it is far more difficult to
develop because all the data structures and function parameters exchanged
between the API and the x86 code must be converted.
User mode Linux [7] was the only solution before QEMU to launch a
User mode Linux [5] was the only solution before QEMU to launch a
Linux kernel as a process while not needing any host kernel
patches. However, user mode Linux requires heavy kernel patches while
QEMU accepts unpatched Linux kernels. The price to pay is that QEMU is
slower.
The Plex86 [8] PC virtualizer is done in the same spirit as the now
The Plex86 [6] PC virtualizer is done in the same spirit as the now
obsolete qemu-fast system emulator. It requires a patched Linux kernel
to work (you cannot launch the same kernel on your PC), but the
patches are really small. As it is a PC virtualizer (no emulation is
@ -359,13 +359,13 @@ done except for some privileged instructions), it has the potential of
being faster than QEMU. The downside is that a complicated (and
potentially unsafe) host kernel patch is needed.
The commercial PC Virtualizers (VMWare [9], VirtualPC [10], TwoOStwo
[11]) are faster than QEMU, but they all need specific, proprietary
The commercial PC Virtualizers (VMWare [7], VirtualPC [8]) are faster
than QEMU (without virtualization), but they all need specific, proprietary
and potentially unsafe host drivers. Moreover, they are unable to
provide cycle exact simulation as an emulator can.
VirtualBox [12], Xen [13] and KVM [14] are based on QEMU. QEMU-SystemC
[15] uses QEMU to simulate a system where some hardware devices are
VirtualBox [9], Xen [10] and KVM [11] are based on QEMU. QEMU-SystemC
[12] uses QEMU to simulate a system where some hardware devices are
developed in SystemC.
@node Portable dynamic translation
@ -608,64 +608,51 @@ way, it can be relocated at load time.
@table @asis
@item [1]
@url{http://citeseer.nj.nec.com/piumarta98optimizing.html}, Optimizing
direct threaded code by selective inlining (1998) by Ian Piumarta, Fabio
Riccardi.
@item [2]
@url{http://developer.kde.org/~sewardj/}, Valgrind, an open-source
memory debugger for x86-GNU/Linux, by Julian Seward.
@item [3]
@url{http://bochs.sourceforge.net/}, the Bochs IA-32 Emulator Project,
by Kevin Lawton et al.
@item [4]
@url{http://www.cs.rose-hulman.edu/~donaldlf/em86/index.html}, the EM86
x86 emulator on Alpha-Linux.
@item [2]
@url{http://www.valgrind.org/}, Valgrind, an open-source memory debugger
for GNU/Linux.
@item [5]
@item [3]
@url{http://ftp.dreamtime.org/pub/linux/Linux-Alpha/em86/v0.2/docs/em86.html},
the EM86 x86 emulator on Alpha-Linux.
@item [4]
@url{http://www.usenix.org/publications/library/proceedings/usenix-nt97/@/full_papers/chernoff/chernoff.pdf},
DIGITAL FX!32: Running 32-Bit x86 Applications on Alpha NT, by Anton
Chernoff and Ray Hookway.
@item [6]
@url{http://www.willows.com/}, Windows API library emulation from
Willows Software.
@item [7]
@item [5]
@url{http://user-mode-linux.sourceforge.net/},
The User-mode Linux Kernel.
@item [8]
@item [6]
@url{http://www.plex86.org/},
The new Plex86 project.
@item [9]
@item [7]
@url{http://www.vmware.com/},
The VMWare PC virtualizer.
@item [10]
@url{http://www.microsoft.com/windowsxp/virtualpc/},
@item [8]
@url{https://www.microsoft.com/download/details.aspx?id=3702},
The VirtualPC PC virtualizer.
@item [11]
@url{http://www.twoostwo.org/},
The TwoOStwo PC virtualizer.
@item [12]
@item [9]
@url{http://virtualbox.org/},
The VirtualBox PC virtualizer.
@item [13]
@item [10]
@url{http://www.xen.org/},
The Xen hypervisor.
@item [14]
@url{http://kvm.qumranet.com/kvmwiki/Front_Page},
@item [11]
@url{http://www.linux-kvm.org/},
Kernel Based Virtual Machine (KVM).
@item [15]
@item [12]
@url{http://www.greensocs.com/projects/QEMUSystemC},
QEMU-SystemC, a hardware co-simulator.