one-elf | ELF reader in Java

 by   odnoklassniki Java Version: Current License: Apache-2.0

kandi X-RAY | one-elf Summary

kandi X-RAY | one-elf Summary

one-elf is a Java library. one-elf has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. However one-elf build file is not available. You can download it from GitHub.

ELF reader in Java.
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    Quality
      Security
        License
          Reuse

            kandi-support Support

              one-elf has a low active ecosystem.
              It has 15 star(s) with 5 fork(s). There are 12 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              There are 0 open issues and 1 have been closed. There are 1 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of one-elf is current.

            kandi-Quality Quality

              one-elf has 0 bugs and 0 code smells.

            kandi-Security Security

              one-elf has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              one-elf code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              one-elf is licensed under the Apache-2.0 License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              one-elf releases are not available. You will need to build from source code and install.
              one-elf has no build file. You will be need to create the build yourself to build the component from source.
              one-elf saves you 377 person hours of effort in developing the same functionality from scratch.
              It has 899 lines of code, 97 functions and 16 files.
              It has medium code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi has reviewed one-elf and discovered the below as its top functions. This is intended to give you an instant insight into one-elf implemented functionality, and help decide if they suit your requirements.
            • Returns an iterator over all symbols in this set
            • Read a string at the given index
            • Gets the symbol with the given name
            • Returns link
            • Returns a string representation of this symbol
            • Get the integer type
            • Gets the symbol
            • Returns a string representation of the address
            • Get the type of the directory
            • Get the number of elements
            • Returns a string representation of this object
            • Returns the column name
            • Read directory types
            • Instantiates a new directory
            • Returns a string representation of this virtual address
            • The name of the field
            • Get the relocations
            • Region relocation
            • Reads a list of sections
            • Reads a section
            • Returns the byte order for the buffer
            • Reads a name from the buffer
            • Returns a string representation of this attribute
            • Return an array of all the symbols
            • Iterates over the set of relocations
            • Returns a section with the given name
            Get all kandi verified functions for this library.

            one-elf Key Features

            No Key Features are available at this moment for one-elf.

            one-elf Examples and Code Snippets

            No Code Snippets are available at this moment for one-elf.

            Community Discussions

            QUESTION

            How do I really disable all rustc optimizations?
            Asked 2022-Mar-11 at 12:38

            I'm trying to learn assembly through compiling Rust. I have found a way to compile Rust code to binary machine code and be able to objdump it to view the assembly. However if I write the following:

            ...

            ANSWER

            Answered 2022-Mar-11 at 12:38

            There is one compiler pass before the generation of LLVM-IR, which is the generation of MIR, the Rust intermediate representation. If you emit this for the given code with a command such as this one:

            Source https://stackoverflow.com/questions/71437329

            QUESTION

            Can't find where preempt count in the stack is declared for a percpu variable access. (linux kernel)
            Asked 2022-Feb-11 at 12:21

            I was debugging linux boot and tried to understand how these percpu variables work in arm64. For test, I added a function called read_pkcontext1 which returns the percpu variable printk_context. (This value is used for printk) And I found something I can't understand.
            (this is from linux 5.4.21)

            ...

            ANSWER

            Answered 2022-Feb-11 at 12:21

            this_cpu_read(printk_context) expands to:
            __pcpu_size_call_return(this_cpu_read_, printk_context)

            Source https://stackoverflow.com/questions/71061922

            QUESTION

            Why ARM cores behaving differently with an ELF and binary file
            Asked 2022-Jan-06 at 10:11

            I am doing baremetal development on ARM and emulating Raspi 3 on QEMU. Below is my minimal assembly code :

            ...

            ANSWER

            Answered 2022-Jan-06 at 10:11

            The QEMU -kernel option treats the file it loads differently depending on whether it is an ELF file or not.

            If it is an ELF file, it is loaded according to what the ELF file says it should be loaded as, and started by executing from the ELF entry point. If it is not an ELF file, it is assumed to be a Linux kernel, and started in the way that the Linux kernel's booting protocol requires.

            In particular, for a multi-core board, if -kernel gets an ELF file it starts all the cores at once at the entry point. If it gets a non-ELF file then it will do whatever that hardware is supposed to do for loading a Linux kernel. For raspi3b this means emulating the firmware behaviour of "secondary cores sit in a loop waiting for the primary core to release them by writing to a 'mailbox' address. This is the behaviour you're seeing in gdb -- the 0x300 address that cores 1-3 are at is in the "spin in a loop waiting" code.

            In general, unless your guest code is a Linux kernel or is expecting to be booted in the same way as a Linux kernel, don't use the -kernel option to load it. -kernel is specifically "try to do what Linux kernels want", and it also tends to have a lot of legacy "this seemed like a useful thing to somebody" behaviour that differs from board to board or between different guest CPU architectures. The "generic loader" is a good way to load ELF files if you want complete manual control for "bare metal" work.

            For more info on the various QEMU options for loading guest code, see this answer.

            Source https://stackoverflow.com/questions/70603156

            QUESTION

            GDB stepping through instructions on a particular core in baremetal development on QEMU
            Asked 2022-Jan-05 at 18:09

            I am learning baremetal development on ARM, for which I chose to simulate Raspi3 on QEMU. Hence, its a virtual ARM Cortex A-53 imlementing ARMv8 architecture. I have compiled the following simple baremetal code :

            ...

            ANSWER

            Answered 2022-Jan-05 at 05:15

            You probably have an issue with the versions of gdb or qemu you are using, since I was not able to reproduce your problem with a version 10.1 of aarch64-elf-gdb and a version 6.2.0 of qemu-system-aarch64 compiled from scratch on an Ubuntu 20.04.3 LTS system:

            wfe.s:

            Source https://stackoverflow.com/questions/70577980

            QUESTION

            How to run arm64 baremetal hello world program on qemu?
            Asked 2021-Dec-13 at 02:17

            Often a question leads me into another question.
            While trying to debug an inline assembly code, I met with another basic problem.
            To make long story short, I want to run arm64 baremetal hello world program on qemu.

            ...

            ANSWER

            Answered 2021-Dec-10 at 11:05

            When you build a program for "bare metal" that means that you need to configure your toolchain to produce a binary that works on the specific piece of bare metal that you try to run it on. For instance, the binary must:

            • put its code somewhere in the machine's memory map where there is either ROM or RAM
            • put its data where there is RAM
            • make sure that on startup the stack pointer is correctly initialized to point into RAM
            • if it wants to print output, include routines which access a suitable device on that machine. This is likely a serial port, and serial ports are often entirely different devices, located at different addresses, on different machines

            If any of these things are wrong or don't match the actual machine you run on, the result is typically exactly what you see -- the program crashes without output.

            More specifically, rdimon.specs tells the compiler to build in C library functions which do some of this via the "semihosting" debugger ABI (which has support for "print string" and some other things). Your QEMU command line doesn't enable implementation of semihosting (you can turn it on with the -semihosting option), so that won't work at all. But there are probably other problems you're also hitting.

            Source https://stackoverflow.com/questions/70302043

            QUESTION

            c++: error: unrecognized command-line option ‘-target’
            Asked 2021-Nov-28 at 08:16

            Im compiling a program I made using make and I get this error

            ...

            ANSWER

            Answered 2021-Nov-28 at 08:16

            In my case, c++ was the g++ compiler instead of the clang compiler, if you are having a similar issue try updating g++ or clang++(on older macs you may need to have to use brew to install those) or going in your /usr/bin directory(for mac and linux, I never used windows cant help you) and replacing the files(though only do that if you absolutely know what your doing!).

            Source https://stackoverflow.com/questions/70139565

            QUESTION

            In u-boot compile, linker script's sdram start and length are set by CONFIG_SPL_BSS_START_ADDR and CONFIG_SPL_BSS_MAX_SIZE values, why?
            Asked 2021-Nov-17 at 23:32

            I'm trying to build u-boot for our simple test board. (arm64)
            After setting in include/configs/ab21m.h (our board),

            ...

            ANSWER

            Answered 2021-Nov-17 at 12:49

            So, your first problem is a literal one. You have SZ_32K as the value for CONFIG_SPL_BSS_MAX_SIZE but since you're likely lacking #include in include/configs/ab21m.h you're not getting that constant evaluated.

            As for what this is all doing, and why you should likely use something more like 2MB as seen on other platforms and place it in SDRAM rather than much smaller on-chip memory, if you look at arch/arm/cpu/armv8/u-boot-spl.lds you can see we're defining where the BSS should reside and that's likely larger than 32KB (and you'll get an overflow error when linking, if so).

            Source https://stackoverflow.com/questions/70002562

            QUESTION

            How does `Depends on` and `Selected by` work in Kconfig when they conflict
            Asked 2021-Nov-15 at 14:15

            To understand how SPL (secondary boot loader), I tried (in u-boot v2021.10)

            ...

            ANSWER

            Answered 2021-Nov-15 at 14:15

            Kconfig in general can be difficult to follow (and a few things in how we use it in U-Boot need to be cleaned up as it makes things harder still to follow). It's often best to look at the Kconfig files directly, to better understand things. In this case as you've noted, SPL_OS_BOOT depends on SPL and if we look in common/spl/Kconfig we see:

            Source https://stackoverflow.com/questions/69971518

            QUESTION

            Why won't me custom kernel launch in QEMU?
            Asked 2021-Sep-07 at 10:34

            I'm looking into creating my own OS for a hobby/learning purpose.

            I have created a simple rust program but cannot get it to start with QEMU. My rust code is shown below.

            ...

            ANSWER

            Answered 2021-Sep-07 at 10:34

            QEMU has probably decided that your ELF file isn't the right format and fallen back to "assume this is a raw binary". If you want to debug what's going wrong you could run QEMU under gdb and look at the code path taken starting with the riscv_load_kernel() function.

            More generally, though, '-kernel' behaviour in QEMU is architecture-dependent, but mostly is designed for "boot a Linux kernel". So if you're definitely building your custom OS to match the image format and boot protocol that Linux uses, then it's the right option. If you're just building a random ELF file and want to have QEMU start from its entry point, though, you might find the generic loader a better fit.

            Source https://stackoverflow.com/questions/69083040

            QUESTION

            Unable to blink Raspberry Pi LED using bare metal Rust
            Asked 2021-Jul-29 at 15:52

            I am working on bare metal programming for a Raspberry Pi 3. I have been able to blink a light using a tutorial and I am now trying to do the same in Rust.

            My project contains the following files:

            main.rs

            ...

            ANSWER

            Answered 2021-Jul-29 at 15:52

            It turns out that the issue was in my arch.json file, which I was using to specify the architecture and tooling for the compiler. Changing the linker and llvm target to arm-none-eabihf fixed this issue:

            Source https://stackoverflow.com/questions/68551412

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

            Vulnerabilities

            No vulnerabilities reported

            Install one-elf

            You can download it from GitHub.
            You can use one-elf like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the one-elf component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .

            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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          • CLI

            gh repo clone odnoklassniki/one-elf

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            git@github.com:odnoklassniki/one-elf.git

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