NAME
dl_iterate_phdr —
iterate over program headers
SYNOPSIS
#include
<link.h>
int
dl_iterate_phdr(int
(*callback)(struct dl_phdr_info *, size_t, void*),
void *data);
DESCRIPTION
The
dl_iterate_phdr()
function iterates over all shared objects loaded into a process's address
space, calling callback for each shared object,
passing it information about the object's program headers and the
data argument. Iteration continues until either there
are no more objects to iterate over or callback
returns a non-zero value.
The information about the program headers is passed in a structure that is defined as:
struct dl_phdr_info {
Elf_Addr dlpi_addr;
const char *dlpi_name;
const Elf_Phdr *dlpi_phdr;
Elf_Half dlpi_phnum;
};
The members of struct dl_phdr_info have the following meaning:
- dlpi_addr
- The base address at which the shared object is mapped into the address space of the calling process.
- dlpi_name
- The name of the shared object.
- dlpi_phdr
- A pointer to the shared object's program headers.
- dlpi_phnum
- The number of program headers in the shared object.
Future versions of OpenBSD might add more members to this structure. To make it possible for programs to check whether any new members have been added, the size of the structure is passed as an argument to callback.
SEE ALSO
HISTORY
The dl_iterate_phdr function first
appeared in OpenBSD 3.7.