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In most Unix-like systems, most of the machine code that makes up the dynamic linker is actually an external executable that the operating system kernel loads and executes first in a process address space newly constructed as a result of calling exec or posix_spawn functions. At link time, the path of the dynamic linker that should be used is ...
An ELF file has two views: the program header shows the segments used at run time, whereas the section header lists the set of sections.. In computing, the Executable and Linkable Format [2] (ELF, formerly named Extensible Linking Format) is a common standard file format for executable files, object code, shared libraries, and core dumps.
This allows drivers and devices outside of the mainline kernel to continue working after a Linux kernel upgrade. [3] Another benefit of DKMS is that it allows the installation of a new driver on an existing system, running an arbitrary kernel version, without any need for manual compilation or precompiled packages provided by the vendor.
Depending on the library ordering on the link command line (i.e. -lfoo -lbar) the dynamic linker uses the weak f from libfoo.so although a strong version is available at runtime. The GNU ld provides the environment variable LD_DYNAMIC_WEAK to provide weak semantics for the dynamic linker. [1] [8] When using constructs like
Dynamic linking or late binding is linking performed while a program is being loaded or executed (), rather than when the executable file is created.A dynamically linked library (dynamic-link library, or DLL, under Windows and OS/2; shareable image under OpenVMS; [3] dynamic shared object, or DSO, under Unix-like systems) is a library intended for dynamic linking.
Direct binding is a feature of the linker and dynamic linker on Solaris and OpenSolaris.It provides a method to allow libraries to directly bind symbols to other libraries, rather than weakly bind to them and leave the dynamic linker to figure out which library contains the symbol.
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Loadable kernel modules in Linux are loaded (and unloaded) by the modprobe command. They are located in /lib/modules or /usr/lib/modules and have had the extension .ko ("kernel object") since version 2.6 (previous versions used the .o extension). [5] The lsmod command lists the loaded kernel modules.