darwin-xnu | This repository is a pure mirror

 by   apple C Version: xnu-7195.121.3 License: Non-SPDX

kandi X-RAY | darwin-xnu Summary

kandi X-RAY | darwin-xnu Summary

darwin-xnu is a C library. darwin-xnu has no bugs, it has no vulnerabilities and it has medium support. However darwin-xnu has a Non-SPDX License. You can download it from GitHub.

XNU kernel is part of the Darwin operating system for use in macOS and iOS operating systems. XNU is an acronym for X is Not Unix. XNU is a hybrid kernel combining the Mach kernel developed at Carnegie Mellon University with components from FreeBSD and a C++ API for writing drivers called IOKit. XNU runs on x86_64 for both single processor and multi-processor configurations.
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              darwin-xnu has a medium active ecosystem.
              It has 10671 star(s) with 1658 fork(s). There are 578 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              darwin-xnu has no issues reported. There are 3 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of darwin-xnu is xnu-7195.121.3

            kandi-Quality Quality

              darwin-xnu has 0 bugs and 0 code smells.

            kandi-Security Security

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

            kandi-License License

              darwin-xnu 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.

            kandi-Reuse Reuse

              darwin-xnu releases are not available. You will need to build from source code and install.
              Installation instructions, examples and code snippets are available.
              It has 48870 lines of code, 1400 functions and 322 files.
              It has high code complexity. Code complexity directly impacts maintainability of the code.

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            darwin-xnu Key Features

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            darwin-xnu Examples and Code Snippets

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            Community Discussions

            QUESTION

            What are the alignments referred to when discussing the strings section of a process address space
            Asked 2021-Apr-13 at 05:00

            I'm trying to write a program to expose the arguments of other pids on macOS. I've made the KERN_PROCARGS2 sysctl, but it turns out that everyone and their dog use this wrong. Including Apple's ps, and Google's Chrome. The exec family of functions all allow you to pass an empty string as argv[0], which is not great but it can happen and so must be dealt with. In this case, the standard approach of skipping forward past the NULLs following the exec_path in the returned buffer doesn't work, as the last NULL before the rest of the arguments is actually the terminating NULL of an empty string, So you wind up skipping an argument you didn't mean to, which can result in printing an env var as an argument (I've confirmed this behaviour in many programs).

            To do this properly one must calculate how many nulls to skip, instead of skipping them all every time. There are references around the web to the different parts of the returned buffer being pointer aligned, however no matter what part of the buffer I try to check with len % 8 I don't get a correct count of padding NULLs.

            ...

            ANSWER

            Answered 2021-Apr-13 at 05:00

            It's the length of the saved exec_path that needs to be padded to a multiple of the system pointer length.

            Source https://stackoverflow.com/questions/66943561

            QUESTION

            Should macOS driverkit system extensions be arm64 or arm64e for Apple Silicon / M1?
            Asked 2021-Feb-02 at 21:26

            I compile a macOS driverkit system extension as a Universal library so that it contains both x86_64 and arm64. One Apple Silicon computer A the driver starts when I attach the USB device. On Apple Silicon computer B I can see kernel: exec_mach_imgact: disallowing arm64 platform driverkit binary "com.example.driver", should be arm64e being printed in the Console.app when the USB device is attached. I've looked at the source code of where this is happening but I cannot figure out what the problem is. If I compile it for arm64e then it get exec_mach_imgact: not running binary "com.example.driver" built against preview arm64e on computer A, bit then it starts on computer B.

            None of the computers have -arm64e_preview_abi set in the boot-args.

            If I create a new Xcode (12.4) project on each machine and build Release then computer A and otool -fvv com.example.driver gives

            ...

            ANSWER

            Answered 2021-Jan-31 at 10:41

            My experience so far indicates that arm64e is the correct and only correct Apple Silicon architecture to use for dexts.

            For one, there's the "disallowing arm64 platform" error, and also Apple's own DriverKit based drivers are built for arm64e:

            Source https://stackoverflow.com/questions/65970643

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

            Vulnerabilities

            No vulnerabilities reported

            Install darwin-xnu

            To install IOKit headers, see additional comments in [iokit/IOKit/Makefile](). XNU installs header files at the following locations -. Kernel.framework is used by kernel extensions.\ The System.framework and /usr/include are used by user level applications. \ /System/DriverKit/usr/include is used by userspace drivers. \ The header files in framework’s PrivateHeaders are only available for Apple Internal Development . The directory containing the header file should have a Makefile that creates the list of files that should be installed at different locations. If you are adding the first header file in a directory, you will need to create Makefile similar to xnu/bsd/sys/Makefile. Add your header file to the correct file list depending on where you want to install it. The default locations where the header files are installed from each file list are -. The Makefile combines the file lists mentioned above into different install lists which are used by build system to install the header files. There are two types of install lists: machine-dependent and machine-independent. These lists are indicated by the presence of MD and MI in the build setting, respectively. If your header is architecture-specific, then you should use a machine-dependent install list (e.g. INSTALL_MD_LIST). If your header should be installed for all architectures, then you should use a machine-independent install list (e.g. INSTALL_MI_LIST). If the install list that you are interested does not exist, create it by adding the appropriate file lists. The default install lists, its member file lists and their default location are described below -. If you want to install the header file in a sub-directory of the paths described in (1), specify the directory name using two variables INSTALL_MI_DIR and EXPORT_MI_DIR as follows -. A single header file can exist at different locations using the steps mentioned above. However it might not be desirable to make all the code in the header file available at all the locations. For example, you want to export a function only to kernel level but not user level.
            $(DSTROOT)/System/Library/Frameworks/Kernel.framework/Headers
            $(DSTROOT)/System/Library/Frameworks/Kernel.framework/PrivateHeaders
            $(DSTROOT)/usr/include/
            $(DSTROOT)/System/DriverKit/usr/include/
            $(DSTROOT)/System/Library/Frameworks/System.framework/PrivateHeaders
            DATAFILES : To make header file available in user level - $(DSTROOT)/usr/include
            DRIVERKIT_DATAFILES : To make header file available to DriverKit userspace drivers - $(DSTROOT)/System/DriverKit/usr/include
            PRIVATE_DATAFILES : To make header file available to Apple internal in user level - $(DSTROOT)/System/Library/Frameworks/System.framework/PrivateHeaders
            KERNELFILES : To make header file available in kernel level - $(DSTROOT)/System/Library/Frameworks/Kernel.framework/Headers $(DSTROOT)/System/Library/Frameworks/Kernel.framework/PrivateHeaders
            PRIVATE_KERNELFILES : To make header file available to Apple internal for kernel extensions - $(DSTROOT)/System/Library/Frameworks/Kernel.framework/PrivateHeaders
            INSTALL_MI_LIST : Installs header file to a location that is available to everyone in user level. Locations - $(DSTROOT)/usr/include Definition - INSTALL_MI_LIST = ${DATAFILES}
            INSTALL_DRIVERKIT_MI_LIST : Installs header file to a location that is available to DriverKit userspace drivers. Locations - $(DSTROOT)/System/DriverKit/usr/include Definition - INSTALL_DRIVERKIT_MI_LIST = ${DRIVERKIT_DATAFILES}
            INSTALL_MI_LCL_LIST : Installs header file to a location that is available for Apple internal in user level. Locations - $(DSTROOT)/System/Library/Frameworks/System.framework/PrivateHeaders Definition - INSTALL_MI_LCL_LIST = ${PRIVATE_DATAFILES}
            INSTALL_KF_MI_LIST : Installs header file to location that is available to everyone for kernel extensions. Locations - $(DSTROOT)/System/Library/Frameworks/Kernel.framework/Headers Definition - INSTALL_KF_MI_LIST = ${KERNELFILES}
            INSTALL_KF_MI_LCL_LIST : Installs header file to location that is available for Apple internal for kernel extensions. Locations - $(DSTROOT)/System/Library/Frameworks/Kernel.framework/PrivateHeaders Definition - INSTALL_KF_MI_LCL_LIST = ${KERNELFILES} ${PRIVATE_KERNELFILES}
            EXPORT_MI_LIST : Exports header file to all of xnu (bsd/, osfmk/, etc.) for compilation only. Does not install anything into the SDK. Definition - EXPORT_MI_LIST = ${KERNELFILES} ${PRIVATE_KERNELFILES}
            INSTALL_MODULEMAP_INCDIR_MI_LIST : Installs module map file to a location that is available to everyone in user level, installing at the root of INCDIR. Locations - $(DSTROOT)/usr/include Definition - INSTALL_MODULEMAP_INCDIR_MI_LIST = ${MODULEMAP_INCDIR_FILES}
            PRIVATE : If defined, enclosed definitions are considered System Private Interfaces. These are visible within xnu and exposed in user/kernel headers installed within the AppleInternal "PrivateHeaders" sections of the System and Kernel frameworks.
            KERNEL_PRIVATE : If defined, enclosed code is available to all of xnu kernel and Apple internal kernel extensions and omitted from user headers.
            BSD_KERNEL_PRIVATE : If defined, enclosed code is visible exclusively within the xnu/bsd module.
            MACH_KERNEL_PRIVATE: If defined, enclosed code is visible exclusively within the xnu/osfmk module.
            XNU_KERNEL_PRIVATE: If defined, enclosed code is visible exclusively within xnu.
            KERNEL : If defined, enclosed code is available within xnu and kernel extensions and is not visible in user level header files. Only the header files installed in following paths will have the code - $(DSTROOT)/System/Library/Frameworks/Kernel.framework/Headers $(DSTROOT)/System/Library/Frameworks/Kernel.framework/PrivateHeaders g. `DRIVERKIT`: If defined, enclosed code is visible exclusively in the DriverKit SDK headers used by userspace drivers.

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