dladdr - translate address to symbolic information
#include <stdio.h> #define __EXTENSIONS__ #include
Dl_info *dlip );
Specifies the address for the symbol being sought. Specifies
the preallocated Dl_info structure that dladdr() will
fill in based on the specified address.
The dladdr() function is one of a family of routines that
give the user direct access to the dynamic linking facilities.
It can only be used in dynamically linked processes.
The dladdr() function determines whether the specified
address is located within one of the mapped objects that
make up the current application's address space. An
address is considered to be within a mapped object when it
is between the base address and the end address of that
object. If a mapped object fits this criteria, the loader
searches the object's symbol table to locate the nearest
symbol to the specified address.
The Dl_info structure includes the following members:
const char * dli_fname; void * dli_fbase; const
char * dli_sname; void * dli_saddr;
Descriptions of these members are as follows: Pointer to
the file name of the containing object. The base address
of the containing object. Pointer to the symbol name
nearest to the specified address. This symbol either had
the same address or is the nearest symbol with a lower
address. The actual address of the symbol pointed to by
the dli_sname member.
The Dl_info pointer elements point to addresses within the
mapped objects. These may become invalid if objects are
removed prior to these elements being used (see
If the specified address cannot be matched to a mapped
object, a 0 (zero) is returned. Otherwise, a nonzero
returned is made and the associated Dl_info elements are
If no symbol is found to describe the specified address,
both the dli_sname and the dli_saddr members are set to 0.
Functions: dlclose(3), dlerror(3), dlopen(3), dlsym(3)
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