r3 | Experimental static RTOS testing the limit of Rust 's const

by yvt Rust Version: 0.1.1 License: Non-SPDX

X-Ray Key Features Code Snippets(2)Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | r3 Summary

r3 is a Rust library typically used in Embedded System applications. r3 has no bugs, it has no vulnerabilities and it has low support. However r3 has a Non-SPDX License. You can download it from GitHub.

Experimental static RTOS testing the limit of Rust's const eval and generics, supporting Arm A-/M-profile and RISC-V

Support

Quality

Security

License

Reuse

Support

r3 has a low active ecosystem.

It has 64 star(s) with 2 fork(s). There are 5 watchers for this library.

It had no major release in the last 12 months.

r3 has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of r3 is 0.1.1

Quality

r3 has 0 bugs and 0 code smells.

Security

r3 has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

r3 code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

r3 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

r3 releases are available to install and integrate.

Installation instructions are not available. Examples and code snippets are available.

Top functions reviewed by kandi - BETA

kandi's functional review helps you automatically verify the functionalities of the libraries and avoid rework.
Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of r3

Get all kandi verified functions for this library.

r3 Key Features

No Key Features are available at this moment for r3.

r3 Examples and Code Snippets

Example

Rust

Lines of Code : 50

License : Non-SPDX (NOASSERTION)

Copy

#![feature(asm)]
#![feature(const_fn)]
#![feature(const_mut_refs)]
#![feature(const_fn_fn_ptr_basics)]
#![no_std]
#![no_main]

// ----------------------------------------------------------------

// Instantiate the Armv7-M port
use r3_port_arm_m as p

Prerequisites

Rust

Lines of Code : 3

License : Non-SPDX (NOASSERTION)

Copy

error[E0463]: can't find crate for `core`
  |
  = note: the `thumbv7m-none-eabi` target may not be installed

Community Discussions

Trending Discussions on r3

No direct packet access in BPF program with just CAP_BPF?

GNU ARM assembler giving a seemingly irrelevant register in error message

How to know programmatically which is the last object that has the animation

How to stack keyframes in CSS animation programmatically

Avoid volatile bit-field assignment expression reading or writing memory several times

moving between section page using next and previous button in javascript

Why does this PowerPC instruction sequence appear to be setting both cr0 and cr1?

Can't install bash in multiarch build on Alpine

Use Paketo.io / CloudNativeBuildpacks (CNB) in GitLab CI with Kubernetes executor & unprivileged Runners (without pack CLI & docker)

Extract column names for each value in column in matrix in R

QUESTION

No direct packet access in BPF program with just CAP_BPF?

Asked 2022-Mar-09 at 10:21

Up until Linux 5.8 CAP_SYSADMIN was required to load any but the most basic BPF program. The recently introduced CAP_BPF is a welcome addition as it allows to run software leveraging BPF with less privileges.

Certain types of BPF programs can access packet data. The pre-4.7 way of doing it is via bpf_skb_load_bytes() helper. As the verifier got smarter, it became possible to perform "direct packet access", i.e. to access packet bytes by following pointers in the context structure. E.g:

...

ANSWER

Answered 2022-Mar-09 at 10:00

To make direct packet accesses in your program, you will need CAP_PERFMON in addition to CAP_BPF. I'm not aware of any way around it.

Why?

Because of Spectre vulnerabilities, someone able to perform arithmetic on unbounded pointers (i.e., all except stack and map value pointers) can read arbitrary memory via speculative out-of-bounds loads.

Such operations thus need to be forbidden for unprivileged users. Allowing CAP_BPF users to perform those operations would essentially give read access to arbitrary memory to CAP_BPF. For those reasons, I doubt this limitation will be lifted in the future.

Source https://stackoverflow.com/questions/71351495

QUESTION

GNU ARM assembler giving a seemingly irrelevant register in error message

Asked 2022-Feb-15 at 11:20

Goal

I'm building a mutex primitive using gcc inline assembly for a CortexM7 target using the LDREX and STREX instructions, following the Barrier Litmus Tests and Cookbook document from ARM.

Code ...

ANSWER

Answered 2022-Feb-15 at 11:20

Per @jester's help, I realized I had the wrong constraint on the GCC-inline variable alias for the lock. It should have been "+m", specifying a memory address instead of a register.

I was also de-referencing the address of the lock when I should have been leaving it as a pointer.

I changed [lock] "+l"(*lock) to [lock] "+m"(lock) and it now builds.

Source https://stackoverflow.com/questions/71065708

QUESTION

How to know programmatically which is the last object that has the animation

Asked 2022-Feb-05 at 01:19

Is there a way for me to know programmatically on which object the CSS animation applies last

For example,

...

ANSWER

Answered 2022-Feb-04 at 19:17

You can try to achieve this using animationend like so :-

Source https://stackoverflow.com/questions/70991093

QUESTION

How to stack keyframes in CSS animation programmatically

Asked 2022-Jan-28 at 23:00

I am trying to stack CSS keyframes (animation-delay) on the following and I am not sure how to do this programmatically?

...

ANSWER

Answered 2022-Jan-28 at 22:59

Set r class for your rects and I think this can help you:

Source https://stackoverflow.com/questions/70900961

QUESTION

Avoid volatile bit-field assignment expression reading or writing memory several times

Asked 2022-Jan-06 at 12:52

I want to use volatile bit-field struct to set hardware register like following code

...

ANSWER

Answered 2022-Jan-06 at 11:46

There seems to be no need for bitfields in your program: using uint16_t types should make it simpler and generate better code:

Source https://stackoverflow.com/questions/70605443

QUESTION

moving between section page using next and previous button in javascript

Asked 2022-Jan-03 at 11:53

In the same page I have multiple sections.

One section will be shown and this will happen using an active class.

In the same page I have li buttons 1, 2 and 3 and when I click on one of them the section related to it appears and the old one disappears. For that purpose I'm using Javascript.

Also in the same page I have a next and previous button. When I click on the next button the next section should appear and the old one should disappear.

And also the related li to the section should have the active class, the same thing for the previous: when I click on it it should go to the old section and the current should disappear and the li class should be active.

When I'm in the first section the previous button should disappear and when I'm in the last section the next button should disappear.

How can I implement this behavior for the next and previous buttons in this way using Javascript?

Any Help Please!!?

...

ANSWER

Answered 2021-Dec-28 at 08:43

tabsArray.forEach((ele) => {
    ele.addEventListener("click", function (e) {
        tabsArray.forEach((ele) => {
            ele.classList.remove("active");
        });
        e.currentTarget.classList.add("active");
        
        sectionArray.forEach((sec) => {
            sec.classList.remove("active");
        });
    // get the current click section
    // if the current section is 3
    // Then next button should be disabled
    // else if the current section is 1
    // Then prev button should be disabled


        document.querySelector('#' + e.currentTarget.dataset.cont).classList.add("active");
    });
});

Source https://stackoverflow.com/questions/70504236

QUESTION

Why does this PowerPC instruction sequence appear to be setting both cr0 and cr1?

Asked 2021-Nov-23 at 00:43

Upon executing the following set of PowerPC instructions on a big-endian POWER7, why is register r6 == 0b10001000000000000000000000000000?

Is there an implicit condition test from cmpd?

...

ANSWER

Answered 2021-Nov-23 at 00:43

I should have read closer.

From Power ISA V2.07B:

The POWER4, POWER5, POWER7 and POWER8 processors set to 0's all bytes of register RT other than the byte that contains the specified CR field. In the byte that contains the CR field, bits other than those containing the CR field may or may not be set to 0s.

So this behaviour is expected on the machine I am using.

Source https://stackoverflow.com/questions/70073224

QUESTION

Can't install bash in multiarch build on Alpine

Asked 2021-Nov-16 at 11:01

I am trying to build image for linux/arm64/v8 on linux/amd64 Gitlab runner. I run it with this command:

...

ANSWER

Answered 2021-Nov-16 at 11:01

There were three problems with my approach:

I needed to install buildx extension

Source https://stackoverflow.com/questions/69851400

QUESTION

Use Paketo.io / CloudNativeBuildpacks (CNB) in GitLab CI with Kubernetes executor & unprivileged Runners (without pack CLI & docker)

Asked 2021-Nov-15 at 14:04

We want to use Paketo.io / CloudNativeBuildpacks (CNB) GitLab CI in the most simple way. Our GitLab setup uses an AWS EKS cluster with unprivileged GitLab CI Runners leveraging the Kubernetes executor. We also don't want to introduce security risks by using Docker in our builds. So we don't have our host’s /var/run/docker.sock exposed nor want to use docker:dind.

We found some guides on how to use Paketo with GitLab CI like this https://tanzu.vmware.com/developer/guides/gitlab-ci-cd-cnb/ . But as described beneath the headline Use Cloud Native Buildpacks with GitLab in GitLab Build Job WITHOUT Using the GitLab Build Template, the approach relies on Docker and pack CLI. We tried to resemble this in our .gitlab-ci.yml which looks like this:

...

ANSWER

Answered 2021-Nov-15 at 14:04

TLDR;

Use the Buildpack's lifecycle directly inside your .gitlab-ci.yml here's a fully working example):

Source https://stackoverflow.com/questions/69569784

QUESTION

Extract column names for each value in column in matrix in R

Asked 2021-Nov-07 at 19:30

I have following matrix:

...

ANSWER

Answered 2021-Nov-07 at 19:29

We may use paste in a vectorized way by replicating the column names with col index and then get the unique after pasteing with the values of the n.mat (it is a data.frame after as.data.frame - so we used unlist)

Source https://stackoverflow.com/questions/69875793

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

Vulnerabilities

No vulnerabilities reported

Install r3

You can download it from GitHub.
Rust is installed and managed by the rustup tool. Rust has a 6-week rapid release process and supports a great number of platforms, so there are many builds of Rust available at any time. Please refer rust-lang.org for more information.

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 .

Find more information at: