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accel
 
 
audio
audio
 
 
backends
backends
 
 
block
block
 
 
bsd-user
bsd-user
 
 
capstone @ 22ead3e
capstone @ 22ead3e
 
 
chardev
chardev
 
 
contrib
contrib
 
 
crypto
crypto
 
 
default-configs
default-configs
 
 
disas
disas
 
 
docs
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dtc @ e543880
dtc @ e543880
 
 
emscripten
emscripten
 
 
fpu
fpu
 
 
fsdev
fsdev
 
 
gdb-xml
gdb-xml
 
 
hw
hw
 
 
include
include
 
 
io
io
 
 
libdecnumber
libdecnumber
 
 
linux-headers
linux-headers
 
 
linux-user
linux-user
 
 
migration
migration
 
 
nbd
nbd
 
 
net
net
 
 
pc-bios
pc-bios
 
 
po
po
 
 
qapi
qapi
 
 
qga
qga
 
 
qobject
qobject
 
 
qom
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replay
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roms
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scripts
scripts
 
 
scsi
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slirp
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stubs
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target
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tcg
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tests
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trace
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ui
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util
util
 
 
.dir-locals.el
.dir-locals.el
 
 
.editorconfig
.editorconfig
 
 
.exrc
.exrc
 
 
.gdbinit
.gdbinit
 
 
.gitignore
.gitignore
 
 
.gitmodules
.gitmodules
 
 
.gitpublish
.gitpublish
 
 
.mailmap
.mailmap
 
 
.shippable.yml
.shippable.yml
 
 
.travis.yml
.travis.yml
 
 
2gbubble.c
2gbubble.c
 
 
CODING_STYLE
CODING_STYLE
 
 
COPYING
COPYING
 
 
COPYING.LIB
COPYING.LIB
 
 
Changelog
Changelog
 
 
HACKING
HACKING
 
 
LICENSE
LICENSE
 
 
MAINTAINERS
MAINTAINERS
 
 
Makefile
Makefile
 
 
Makefile.objs
Makefile.objs
 
 
Makefile.target
Makefile.target
 
 
README
README
 
 
README.md
README.md
 
 
VERSION
VERSION
 
 
arch_init.c
arch_init.c
 
 
balloon.c
balloon.c
 
 
block.c
block.c
 
 
blockdev-nbd.c
blockdev-nbd.c
 
 
blockdev.c
blockdev.c
 
 
blockjob.c
blockjob.c
 
 
bootdevice.c
bootdevice.c
 
 
bt-host.c
bt-host.c
 
 
bt-vhci.c
bt-vhci.c
 
 
configure
configure
 
 
cpus-common.c
cpus-common.c
 
 
cpus.c
cpus.c
 
 
device-hotplug.c
device-hotplug.c
 
 
device_tree.c
device_tree.c
 
 
disas.c
disas.c
 
 
dma-helpers.c
dma-helpers.c
 
 
dump.c
dump.c
 
 
exec.c
exec.c
 
 
gdbstub.c
gdbstub.c
 
 
hmp-commands-info.hx
hmp-commands-info.hx
 
 
hmp-commands.hx
hmp-commands.hx
 
 
hmp.c
hmp.c
 
 
hmp.h
hmp.h
 
 
ioport.c
ioport.c
 
 
iothread.c
iothread.c
 
 
job-qmp.c
job-qmp.c
 
 
job.c
job.c
 
 
memory.c
memory.c
 
 
memory_ldst.inc.c
memory_ldst.inc.c
 
 
memory_mapping.c
memory_mapping.c
 
 
module-common.c
module-common.c
 
 
monitor.c
monitor.c
 
 

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This is a port of QEMU machine emulator to JavaScript using Emscripten.

The port targets single-threaded WebAssembly and contains a proof-of-concept WebAssembly JIT. For now, only 32-bit guest are supported.

This time, it is branched from the upstream master branch and now this repo does not require separate qemujs-build. This rewrite is still even more work-in-progress than the original one and still does not support block devices.

Links

Here is my article (in Russian) about Qemu.js.

Some similar pre-existing projects:

  • JSLinux -- machine emulator written by Fabrice Bellard, the original author of QEMU
  • Virtual x86 -- another JavaScript machine emulator
  • another attempt (now frozen?) to port QEMU to JavaScript
  • Unicorn.js -- JavaScript port of a QEMU fork

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Qemu.js source code with proof-of-concept machine-code-to-WASM JIT.

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javascriptjitjsqemuvm

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