The function dlsym() takes a "handle" of a dynamic loaded shared object returned by dlopen(3) along with a null-terminated symbol name, and returns the address where that symbol is loaded into memory.

The function dlsym() takes a "handle" of a dynamic library returned by dlopen() and the null-terminated symbol name, returning the address where that symbol is loaded into memory. If the symbol is not found, in the specified library or any of the libraries that were automatically loaded by dlopen() when that library was loaded, dlsym() returns ...

Aug 30, 2009 · What dlsym() returns is normally a function pointer - disguised as a void *. (If you ask it for the name of a global variable, it will return you a pointer to that global variable, too.) You then invoke that function just as you might using any other pointer to function:

May 14, 2014 · From the Linux docs: The function dlerror() returns a human readable string describing the most recent error that occurred from dlopen(), dlsym() or dlclose() since the last call to dlerror(). It returns NULL if no errors have occurred since initialization or since it was last called.

Dynamically loaded (DL) libraries are libraries that are loaded at times other than during the startup of a program. They're particularly useful for implementing plugins or modules, because they permit waiting to load the plugin until it's needed.

dlsym — get the address of a symbol from a symbol table handle. #include <dlfcn.h> void *dlsym(void *restrict handle, const char *restrict name); The dlsym () function shall obtain the address of a symbol (a. function identifier or a data object identifier) defined in the. symbol table identified by the handle argument. The handle .

dlsym - get the address of a symbol from a symbol table handle SYNOPSIS. #include <dlfcn.h> void *dlsym(void *restrict handle, const char *restrict name); DESCRIPTION. The dlsym() function shall obtain the address of a symbol (a function identifier or a data object identifier) defined in the symbol table identified by the handle argument.

The dlsym() function shall obtain the address of a symbol defined within an object made accessible through a dlopen() call. The handle argument is the value returned from a call to dlopen() (and which has not since been released via a call to dlclose()), and name is the symbol's name as a character string.

The function dlsym() takes a "handle" of a dynamic loaded shared object returned by dlopen(3) along with a null-terminated symbol name, and returns the address where that symbol is loaded into memory.

Dec 27, 2023 · dlsym() Syntax and Parameters. The signature of the dlsym() function is quite simple: void *dlsym(void *restrict handle, const char *restrict symbol); It accepts a handle to a dynamic library returned by dlopen() as well as the symbol name string you want to lookup. It returns a void pointer to memory where that symbol resides.