qemu | Official QEMU mirror

by qemu C Version: v8.0.2 License: Non-SPDX

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | qemu Summary

qemu is a C library typically used in Hardware applications. qemu has no bugs and it has medium support. However qemu has 13 vulnerabilities and it has a Non-SPDX License. You can download it from GitHub, GitLab.

Official QEMU mirror. Please see https://www.qemu.org/contribute/ for how to submit changes to QEMU. Pull Requests are ignored. Please only use release tarballs from the QEMU website.

Support

Quality

Security

License

Reuse

Support

qemu has a medium active ecosystem.

It has 7935 star(s) with 4693 fork(s). There are 396 watchers for this library.

It had no major release in the last 6 months.

qemu has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of qemu is v8.0.2

Quality

qemu has no bugs reported.

Security

qemu has 13 vulnerability issues reported (0 critical, 4 high, 8 medium, 1 low).

License

qemu has a Non-SPDX License.

Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

Reuse

qemu releases are not available. You will need to build from source code and install.

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qemu Key Features

No Key Features are available at this moment for qemu.

qemu Examples and Code Snippets

No Code Snippets are available at this moment for qemu.

Community Discussions

Trending Discussions on qemu

va_args not accepting signed integer in C

How do I detect QEMU emulation from within a Docker container?

Am I misunderstand something? Unexpected behaviour in github actions

Android Emulator stop working after update to 31.2.6 [M1/Apple Silicon]

Android emulator on apple silicon (arm64) could be run only using sudo mode

Android Studio can't run AVD... times out

gnu ld treating assembly output as linker script, how to fix? or am i doing something wrong in my compiling?

When running yocto runqemu the ip seems not to be found

Why are zero-initialized globals defined outside of bss using this linker script?

xv6 installation in WSL (Ubuntu 20.04 LTS)

QUESTION

va_args not accepting signed integer in C

Asked 2022-Apr-04 at 12:24

I was designing my kernel using C. While making the kprintf function (a function like printf but works with the kernel) I saw that signed integers (precisely the data type is long), va_args is converting them to unsigned long.

Here's a snippet of the code: kPrint.c

...

ANSWER

Answered 2022-Apr-04 at 12:06

The call kprintf("Number: %d\n", -1234); is incorrect because %d extracts a long long. It must be kprintf("Number: %d\n", -1234LL);.

-1234 is a 32 bit operand. The problem could be that this is being passed in a 64 bit aligned word, but not being sign extended to 64 bits.

So that is to say, the -1234 value in 64 bits needs to be fffffffffffffb2e, but the 32 bit parameter is producing a 00000000fffffb2e image on the stack, which is 4294966062.

According to this hypothesis, we would have to pass -1000 to obtain the observed 429496629, however. It bears no relation to -1234. Something else could be going on, like garbage bits being interpreted as data.

The behavior is not well-defined, after all: you're shoving an integer of one size into a completely typeless and unsafe parameter passing mechanism and pulling out an integer of a different size.

Source https://stackoverflow.com/questions/71736608

QUESTION

How do I detect QEMU emulation from within a Docker container?

Asked 2022-Mar-28 at 07:26

From within a docker container (in my case running a Debian Busty based image) how can I detect whether it's running under QEMU emulation (as happens on ARM Macs for AMD64 images)?

From the non-docker perspective I've seen suggestion that cpuinfo might surface this, but it doesn't yield anything directly QEMU related when run from inside my container:

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ANSWER

Answered 2022-Mar-28 at 07:26

There are more ways to detect that the container is running under the emulation, however the most reliable way is to use identify if the entry point is emulated.

When a container is created, the entry point will become the PID 1. The mechanism that Docker uses for the qemu emulation will detect that the entry point is for a different architecture and will involve the emulator to emulate the architecture. You can read more about the mechanism used in this post.

Since the entry point will be emulated, the process name will be replaced with the qemu-xxxx where the xxxx is the architecture that will be emulated. We can identify if our entry pint process was substituted for qemu if we call ps -uax as in the following example:

Source https://stackoverflow.com/questions/70116861

QUESTION

Am I misunderstand something? Unexpected behaviour in github actions

Asked 2022-Mar-15 at 11:20

So I have a github workflow with job like this:

...

ANSWER

Answered 2022-Mar-15 at 11:20

As you can see on the Ubuntu-20.04 virtual environment, it is provided with some Rust Tools installed:

Source https://stackoverflow.com/questions/71467601

QUESTION

Android Emulator stop working after update to 31.2.6 [M1/Apple Silicon]

Asked 2022-Feb-06 at 07:36

After updating Android emulator to 31.2.6 today, emulator stop working. It says Connecting to the Emulator and process of qemu-system-aarch64 is become unresponsive

It worked well on previous version of emulator, which I downloaded with Arctic Fox, but can't rollback it

AS version: Bumblebee 2021.1.1 (downloaded it using Toolbox app)

macOS: Big Sur 11.6

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ANSWER

Answered 2022-Jan-27 at 11:25

Here is two workarounds I've found for now:

Try to close the process of qemu-system-aarch64 in Monitor System, not force close. When you click close emulator will prompt about saving state and two buttons Yes/No. Ignore them and click close icon in the left corner, then emulator start working correctly. Tried it at least once and it worked.
Because it's Bumblebee, emulator open inside AS by default. To turn off it, open:

Preferences -> Tools -> Emulator

And uncheck checkbox as in the image below

Then emulator will work correctly

Anyway, I think it's bug of 31.2.6

Source https://stackoverflow.com/questions/70876404

QUESTION

Android emulator on apple silicon (arm64) could be run only using sudo mode

Asked 2022-Feb-03 at 21:53

I'm trying to start android emulator on apple silicon mac and I'm always getting the same results:

Running emulator directly through Android Studio (the latest stable version, Arctic Fox 2020.3.1 Patch 4) causes a problem, when the process qemu-system-arch64 stucks and uses 99% CPU (there is no emulator's screen or something like than). Such behavior produces some logs:

internal-error-msg.txt says:

...

ANSWER

Answered 2022-Feb-03 at 21:53

Issue was successfully fixed in Android Emulator revision 31.2.7. Just go to Android SDK Manager and update it!

According to android emulator release notes:

Source https://stackoverflow.com/questions/70713301

QUESTION

Android Studio can't run AVD... times out

Asked 2022-Feb-02 at 15:36

Just got a new M1 Mac Mini and I have been having trouble running my Android projects.

I'm using Android Studio (Bumblebee), JDK 11 (tried 17 as well), and Gradle 7.3.

When I try to run the project from AS, it builds fine and then gets stuck on "Waiting for target device to come online" and eventually times out.

If I try to run the emulator again I get a message that the device is already running, including a path to a lock file.

However, I've found that if I run the emulator manually from the CLI, the emulator does open, at which point I can get AS to run the app on said emulator. So the problem is apparently just that AS can't open the AVD.

Command line output when running emulator via adelphia$ emulator -avd Pixel_3a_API_32_arm64-v8a:

...

ANSWER

Answered 2022-Feb-02 at 15:36

You have to update tools for AVD in the IDE. Android Emulator is 31.2.6

Source https://stackoverflow.com/questions/70920624

QUESTION

gnu ld treating assembly output as linker script, how to fix? or am i doing something wrong in my compiling?

Asked 2022-Feb-02 at 04:48

i've been working on my kernel project and to simulate it (that is to run it on QEMU), i need it as a .iso file.

I have an assembly file and to assemble it - as --32 boot.s -o boot.o

and for the main code (which is in c++), to compile it - gcc -S kernel.cpp -lstdc++ -o kernel.o

gives no error. but,

while linking it with this linker script:-

...

ANSWER

Answered 2021-Sep-08 at 02:58

gcc -S produces assembly language, but ld expects an object file. Somewhere in between you have to run the assembler.

There's no particular need to use the assembler output, so most likely you want to use -c, which does compilation and then assembly to produce an object file, instead of -S:

Source https://stackoverflow.com/questions/69096269

QUESTION

When running yocto runqemu the ip seems not to be found

Asked 2022-Jan-25 at 08:44

I have built a yocto image (just for reference see the end of this question) when I try to run it with runqemu I get the following error:

...

ANSWER

Answered 2022-Jan-25 at 08:44

this is actually complaining about the "ip" command not being found, not your IP address, you need to install it.

Depending on your distribution the package name may change, but for Ubuntu/Debian the package you need is iproute2

Source https://stackoverflow.com/questions/70845350

QUESTION

Why are zero-initialized globals defined outside of bss using this linker script?

Asked 2022-Jan-24 at 20:39

I have the following two variables, KMEM_END and MEM_TOP:

...

ANSWER

Answered 2022-Jan-24 at 20:39

Using --orphan-handling=error while invoking ld, I found out that .sbss existed in the object file, but was never included in the unified final executable.

So using *(.bss .bss.* .sbss .sbss.*) instead of *(.bss .bss.*) fixed the issue.

Source https://stackoverflow.com/questions/70826156

QUESTION

xv6 installation in WSL (Ubuntu 20.04 LTS)

Asked 2022-Jan-24 at 07:29

I have been trying to install xv6 using the following commands:

...

ANSWER

Answered 2022-Jan-24 at 07:29

You need to install the package containing qemu-system-i386. After a little search on https://packages.ubuntu.com, you can find the right package: qemu-system-x86.

To install the missing package, type

Source https://stackoverflow.com/questions/70815734

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install qemu

You can download it from GitHub, GitLab.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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