dl_iterate_phdr(3) - NetBSD Manual Pages

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DL_ITERATE_PHDR(3)      NetBSD Library Functions Manual     DL_ITERATE_PHDR(3)


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.  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 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.

     dlpi_adds     The number of objects added into the main program.

     dlpi_subs     The number of objects removed from the main program.

     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

     ld(1), ld.elf_so(1), dlfcn(3), elf(5)


HISTORY

     The dl_iterate_phdr function first appeared in NetBSD 6.0.

NetBSD 10.99                   October 16, 2010                   NetBSD 10.99