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NAMEdl_iterate_phdr —
iterate over program headers
LIBRARYFor the dynamically linked binaries, the service is provided by ld-elf.so.1(1) dynamic linker. Statically linked programs use an implementation ofdl_iterate_phdr () from libc.
SYNOPSIS#include <link.h>
int
DESCRIPTIONThedl_iterate_phdr () function iterates over all ELF
objects loaded into a process's address space, calling
callback for each object, passing it information about
the object's program headers and the data argument. The
iteration is aborted when all objects are passed, or when the next
callback call returns 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; unsigned long long int dlpi_adds; unsigned long long int dlpi_subs; size_t dlpi_tls_modid; void *dlpi_tls_data; }; The members of
Future versions of FreeBSD 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 second argument to callback. The third argument to callback is the data
value passed to the call to RETURN VALUESThedl_iterate_phdr () returns the value returned by the
last callback call executed.
SEE ALSOld(1), ld-elf.so.1(1), dlopen(3), elf(5)HISTORYThedl_iterate_phdr function first appeared in
FreeBSD 7.0.
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