/* Do relocations for ELF dynamic linking.
- Copyright (C) 1995,96,97,98,99,2000 Free Software Foundation, Inc.
+ Copyright (C) 1995-2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
+ Lesser General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If not,
- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
/* This file may be included twice, to define both
`elf_dynamic_do_rel' and `elf_dynamic_do_rela'. */
#ifdef DO_RELA
-# define elf_dynamic_do_rel elf_dynamic_do_rela
-# define Rel Rela
-# define elf_machine_rel elf_machine_rela
+# define elf_dynamic_do_Rel elf_dynamic_do_Rela
+# define Rel Rela
+# define elf_machine_rel elf_machine_rela
+# define elf_machine_rel_relative elf_machine_rela_relative
#endif
-#ifndef VERSYMIDX
-# define VERSYMIDX(sym) (DT_NUM + DT_THISPROCNUM + DT_VERSIONTAGIDX (sym))
+#ifndef DO_ELF_MACHINE_REL_RELATIVE
+# define DO_ELF_MACHINE_REL_RELATIVE(map, l_addr, relative) \
+ elf_machine_rel_relative (l_addr, relative, \
+ (void *) (l_addr + relative->r_offset))
#endif
/* Perform the relocations in MAP on the running program image as specified
relocations; they should be set up to call _dl_runtime_resolve, rather
than fully resolved now. */
-static inline void
-elf_dynamic_do_rel (struct link_map *map,
+auto inline void __attribute__ ((always_inline))
+elf_dynamic_do_Rel (struct link_map *map,
ElfW(Addr) reladdr, ElfW(Addr) relsize,
- int lazy)
+ __typeof (((ElfW(Dyn) *) 0)->d_un.d_val) nrelative,
+ int lazy, int skip_ifunc)
{
const ElfW(Rel) *r = (const void *) reladdr;
const ElfW(Rel) *end = (const void *) (reladdr + relsize);
+ ElfW(Addr) l_addr = map->l_addr;
+# if defined ELF_MACHINE_IRELATIVE && !defined RTLD_BOOTSTRAP
+ const ElfW(Rel) *r2 = NULL;
+ const ElfW(Rel) *end2 = NULL;
+# endif
+#if (!defined DO_RELA || !defined ELF_MACHINE_PLT_REL) && !defined RTLD_BOOTSTRAP
+ /* We never bind lazily during ld.so bootstrap. Unfortunately gcc is
+ not clever enough to see through all the function calls to realize
+ that. */
if (lazy)
{
/* Doing lazy PLT relocations; they need very little info. */
- ElfW(Addr) l_addr = map->l_addr;
for (; r < end; ++r)
- elf_machine_lazy_rel (map, l_addr, r);
+# ifdef ELF_MACHINE_IRELATIVE
+ if (ELFW(R_TYPE) (r->r_info) == ELF_MACHINE_IRELATIVE)
+ {
+ if (r2 == NULL)
+ r2 = r;
+ end2 = r;
+ }
+ else
+# endif
+ elf_machine_lazy_rel (map, l_addr, r, skip_ifunc);
+
+# ifdef ELF_MACHINE_IRELATIVE
+ if (r2 != NULL)
+ for (; r2 <= end2; ++r2)
+ if (ELFW(R_TYPE) (r2->r_info) == ELF_MACHINE_IRELATIVE)
+ elf_machine_lazy_rel (map, l_addr, r2, skip_ifunc);
+# endif
}
else
+#endif
{
const ElfW(Sym) *const symtab =
(const void *) D_PTR (map, l_info[DT_SYMTAB]);
+ const ElfW(Rel) *relative = r;
+ r += nrelative;
+
+#ifndef RTLD_BOOTSTRAP
+ /* This is defined in rtld.c, but nowhere in the static libc.a; make
+ the reference weak so static programs can still link. This
+ declaration cannot be done when compiling rtld.c (i.e. #ifdef
+ RTLD_BOOTSTRAP) because rtld.c contains the common defn for
+ _dl_rtld_map, which is incompatible with a weak decl in the same
+ file. */
+# ifndef SHARED
+ weak_extern (GL(dl_rtld_map));
+# endif
+ if (map != &GL(dl_rtld_map)) /* Already done in rtld itself. */
+# if !defined DO_RELA || defined ELF_MACHINE_REL_RELATIVE
+ /* Rela platforms get the offset from r_addend and this must
+ be copied in the relocation address. Therefore we can skip
+ the relative relocations only if this is for rel
+ relocations or rela relocations if they are computed as
+ memory_loc += l_addr... */
+ if (l_addr != 0)
+# else
+ /* ...or we know the object has been prelinked. */
+ if (l_addr != 0 || ! map->l_info[VALIDX(DT_GNU_PRELINKED)])
+# endif
+#endif
+ for (; relative < r; ++relative)
+ DO_ELF_MACHINE_REL_RELATIVE (map, l_addr, relative);
+#ifdef RTLD_BOOTSTRAP
+ /* The dynamic linker always uses versioning. */
+ assert (map->l_info[VERSYMIDX (DT_VERSYM)] != NULL);
+#else
if (map->l_info[VERSYMIDX (DT_VERSYM)])
+#endif
{
const ElfW(Half) *const version =
(const void *) D_PTR (map, l_info[VERSYMIDX (DT_VERSYM)]);
for (; r < end; ++r)
{
- ElfW(Half) ndx = version[ELFW(R_SYM) (r->r_info)];
+#if defined ELF_MACHINE_IRELATIVE && !defined RTLD_BOOTSTRAP
+ if (ELFW(R_TYPE) (r->r_info) == ELF_MACHINE_IRELATIVE)
+ {
+ if (r2 == NULL)
+ r2 = r;
+ end2 = r;
+ continue;
+ }
+#endif
+
+ ElfW(Half) ndx = version[ELFW(R_SYM) (r->r_info)] & 0x7fff;
elf_machine_rel (map, r, &symtab[ELFW(R_SYM) (r->r_info)],
&map->l_versions[ndx],
- (void *) (map->l_addr + r->r_offset));
+ (void *) (l_addr + r->r_offset), skip_ifunc);
}
+
+#if defined ELF_MACHINE_IRELATIVE && !defined RTLD_BOOTSTRAP
+ if (r2 != NULL)
+ for (; r2 <= end2; ++r2)
+ if (ELFW(R_TYPE) (r2->r_info) == ELF_MACHINE_IRELATIVE)
+ {
+ ElfW(Half) ndx
+ = version[ELFW(R_SYM) (r2->r_info)] & 0x7fff;
+ elf_machine_rel (map, r2,
+ &symtab[ELFW(R_SYM) (r2->r_info)],
+ &map->l_versions[ndx],
+ (void *) (l_addr + r2->r_offset),
+ skip_ifunc);
+ }
+#endif
}
+#ifndef RTLD_BOOTSTRAP
else
- for (; r < end; ++r)
- elf_machine_rel (map, r, &symtab[ELFW(R_SYM) (r->r_info)], NULL,
- (void *) (map->l_addr + r->r_offset));
+ {
+ for (; r < end; ++r)
+# ifdef ELF_MACHINE_IRELATIVE
+ if (ELFW(R_TYPE) (r->r_info) == ELF_MACHINE_IRELATIVE)
+ {
+ if (r2 == NULL)
+ r2 = r;
+ end2 = r;
+ }
+ else
+# endif
+ elf_machine_rel (map, r, &symtab[ELFW(R_SYM) (r->r_info)], NULL,
+ (void *) (l_addr + r->r_offset), skip_ifunc);
+
+# ifdef ELF_MACHINE_IRELATIVE
+ if (r2 != NULL)
+ for (; r2 <= end2; ++r2)
+ if (ELFW(R_TYPE) (r2->r_info) == ELF_MACHINE_IRELATIVE)
+ elf_machine_rel (map, r2, &symtab[ELFW(R_SYM) (r2->r_info)],
+ NULL, (void *) (l_addr + r2->r_offset),
+ skip_ifunc);
+# endif
+ }
+#endif
}
}
-#undef elf_dynamic_do_rel
+#undef elf_dynamic_do_Rel
#undef Rel
#undef elf_machine_rel
+#undef elf_machine_rel_relative
+#undef DO_ELF_MACHINE_REL_RELATIVE
+#undef DO_RELA
projects / thirdparty / glibc.git / blobdiff