C++ (Cpp) elf_machine_dynamic Examples

Example #1

File: dl-reloc-static-pie.c Project: lattera/glibc

void
_dl_relocate_static_pie (void)
{
  struct link_map *main_map = _dl_get_dl_main_map ();

# define STATIC_PIE_BOOTSTRAP
# define BOOTSTRAP_MAP (main_map)
# define RESOLVE_MAP(sym, version, flags) BOOTSTRAP_MAP
# include "dynamic-link.h"

  /* Figure out the run-time load address of static PIE.  */
  main_map->l_addr = elf_machine_load_address ();

  /* Read our own dynamic section and fill in the info array.  */
  main_map->l_ld = ((void *) main_map->l_addr + elf_machine_dynamic ());
  elf_get_dynamic_info (main_map, NULL);

# ifdef ELF_MACHINE_BEFORE_RTLD_RELOC
  ELF_MACHINE_BEFORE_RTLD_RELOC (main_map->l_info);
# endif

  /* Relocate ourselves so we can do normal function calls and
     data access using the global offset table.  */
  ELF_DYNAMIC_RELOCATE (main_map, 0, 0, 0);
  main_map->l_relocated = 1;

  /* Initialize _r_debug.  */
  struct r_debug *r = _dl_debug_initialize (0, LM_ID_BASE);
  r->r_state = RT_CONSISTENT;

  /* Set up debugging before the debugger is notified for the first
     time.  */
# ifdef ELF_MACHINE_DEBUG_SETUP
  /* Some machines (e.g. MIPS) don't use DT_DEBUG in this way.  */
  ELF_MACHINE_DEBUG_SETUP (main_map, r);
# else
  if (main_map->l_info[DT_DEBUG] != NULL)
    /* There is a DT_DEBUG entry in the dynamic section.  Fill it in
       with the run-time address of the r_debug structure  */
    main_map->l_info[DT_DEBUG]->d_un.d_ptr = (ElfW(Addr)) r;
# endif
}

Example #2

File: db_rtld.c Project: brianmcgillion/graphene

void setup_pal_map (struct link_map * pal_map)
{
    const ElfW(Ehdr) * header = (void *) pal_map->l_addr;

    pal_map->l_real_ld = pal_map->l_ld = (void *) elf_machine_dynamic();
    pal_map->l_type = OBJECT_RTLD;
    pal_map->l_entry = header->e_entry;
    pal_map->l_phdr  = (void *) (pal_map->l_addr + header->e_phoff);
    pal_map->l_phnum = header->e_phnum;
    setup_elf_hash(pal_map);

    char buffer[BUFFER_LENGTH];
    snprintf(buffer, BUFFER_LENGTH,
             "add-symbol-file %s 0x%016llx -readnow -s .rodata 0x%016llx "
             "-s .dynamic 0x%016llx -s .data 0x%016llx -s .bss 0x%016llx",
             pal_map->l_name,
             &section_text, &section_rodata, &section_dynamic,
             &section_data, &section_bss);

    ocall_load_debug(buffer);
    pal_map->l_prev = pal_map->l_next = NULL;
    loaded_maps = pal_map;
}