diff options
Diffstat (limited to 'elf/rtld.c')
| -rw-r--r-- | elf/rtld.c | 42 |
1 files changed, 25 insertions, 17 deletions
diff --git a/elf/rtld.c b/elf/rtld.c index 0ce1fda229..a6910e5161 100644 --- a/elf/rtld.c +++ b/elf/rtld.c @@ -1211,11 +1211,9 @@ ERROR: ld.so: object '%s' from %s cannot be preloaded: ignored.\n", } #ifdef NEED_DL_SYSINFO + struct link_map *sysinfo_map = NULL; if (GL(dl_sysinfo_dso) != NULL) { - /* We have a prelinked DSO preloaded by the system. */ - GL(dl_sysinfo) = GL(dl_sysinfo_dso)->e_entry; - /* Do an abridged version of the work _dl_map_object_from_fd would do to map in the object. It's already mapped and prelinked (and better be, since it's read-only and so we couldn't relocate it). @@ -1225,9 +1223,6 @@ ERROR: ld.so: object '%s' from %s cannot be preloaded: ignored.\n", if (__builtin_expect (l != NULL, 1)) { static ElfW(Dyn) dyn_temp[DL_RO_DYN_TEMP_CNT]; -#ifndef NDEBUG - uint_fast16_t pt_load_num = 0; -#endif l->l_phdr = ((const void *) GL(dl_sysinfo_dso) + GL(dl_sysinfo_dso)->e_phoff); @@ -1239,21 +1234,21 @@ ERROR: ld.so: object '%s' from %s cannot be preloaded: ignored.\n", { l->l_ld = (void *) ph->p_vaddr; l->l_ldnum = ph->p_memsz / sizeof (ElfW(Dyn)); - break; } -#ifndef NDEBUG - if (ph->p_type == PT_LOAD) + else if (ph->p_type == PT_LOAD) { - assert (pt_load_num - || (void *) ph->p_vaddr == GL(dl_sysinfo_dso)); - pt_load_num++; + if (! l->l_addr) + l->l_addr = ph->p_vaddr; + else if (ph->p_vaddr + ph->p_memsz >= l->l_map_end) + l->l_map_end = ph->p_vaddr + ph->p_memsz; } -#endif } + l->l_map_start = (ElfW(Addr)) GL(dl_sysinfo_dso); + l->l_addr = l->l_map_start - l->l_addr; + l->l_map_end += l->l_addr; elf_get_dynamic_info (l, dyn_temp); _dl_setup_hash (l); l->l_relocated = 1; - l->l_map_start = (ElfW(Addr)) GL(dl_sysinfo_dso); /* Now that we have the info handy, use the DSO image's soname so this object can be looked up by name. Note that we do not @@ -1271,6 +1266,11 @@ ERROR: ld.so: object '%s' from %s cannot be preloaded: ignored.\n", _dl_fatal_printf ("out of memory\n"); l->l_libname->name = memcpy (copy, dsoname, len); } + + /* We have a prelinked DSO preloaded by the system. */ + if (GL(dl_sysinfo) == DL_SYSINFO_DEFAULT) + GL(dl_sysinfo) = GL(dl_sysinfo_dso)->e_entry + l->l_addr; + sysinfo_map = l; } } #endif @@ -1316,9 +1316,17 @@ ERROR: ld.so: object '%s' from %s cannot be preloaded: ignored.\n", ++i; GL(dl_rtld_map).l_prev = GL(dl_loaded)->l_searchlist.r_list[i - 1]; if (__builtin_expect (mode, normal) == normal) - GL(dl_rtld_map).l_next = (i + 1 < GL(dl_loaded)->l_searchlist.r_nlist - ? GL(dl_loaded)->l_searchlist.r_list[i + 1] - : NULL); + { + GL(dl_rtld_map).l_next = (i + 1 < GL(dl_loaded)->l_searchlist.r_nlist + ? GL(dl_loaded)->l_searchlist.r_list[i + 1] + : NULL); +#ifdef NEED_DL_SYSINFO + if (sysinfo_map != NULL + && GL(dl_rtld_map).l_prev->l_next == sysinfo_map + && GL(dl_rtld_map).l_next != sysinfo_map) + GL(dl_rtld_map).l_prev = sysinfo_map; +#endif + } else /* In trace mode there might be an invisible object (which we could not find) after the previous one in the search list. |