f420344cef
* elf/dynamic-link.h (elf_get_dynamic_info): Take new argument with load address. Relocate d_ptr in DT_DTRTAB, DT_SYMTAB, DT_RELA, DT_REL, DT_JMPREL, DT_PLTGOT, and DT_VERSYM l_info entry. (_ELF_DYNAMIC_DO_RELOC): Take extra argument which specifies whether rel and rela relocations can both happen and skip one test if this is not possible. (ELF_DYNAMIC_DO_RELA, ELF_DYNAMIC_DO_REL): Call _ELF_DYNAMIC_DO_RELOC appropriately. * elf/dl-addr.c (_dl_addr): DT_SYMTAB and DT_STRTAB entries are already relocated. * elf/dl-deps.c (_dl_map_object_deps): DT_STRTAB entry is already relocated. * elf/dl-load.c (_dl_init_paths): DT_STRTAB entry is already relocated. (_dl_map_object_from_fd): Call elf_get_dynamic_info with new argument. (_dl_map_object): DT_STRTAB entry is already relocated. * elf/dl-lookup.c (do_lookup): DT_STRTAB and DT_SYMTAB entries are already relocated. * elf/dl-reloc.c (_dl_relocate_object): DT_STRTAB entry is already relocated. * elf/dl-runtime.c (fixup): DT_SYMTAB, DT_STRTAB, DT_JMPREL, and DT_VERSYM entries are already relocated. (profile_fixup): Likewise. * elf/dl-version.c: Rename VERSTAG macro into VERSYMIDX. Replace all users. (match_symbol): DT_STRTAB entry is already relocated. (_dl_check_map_versions): Likewise. Also fo DT_VERSYM. * elf/do-rel.h (elf_dynamic_do_rel): reladdr is now assumed to be relocated already. DT_SYMTAB and DT_VERSYM entries are also relocated. * elf/rtld.c (_dl_start): Pass extra argument to elf_get_dynamic_info. (find_needed): DT_STRTAB entry is already relocated. (dl_main): Pass extra argument to elf_get_dynamic_info. DT_STRTAB entry is already relocated. * sysdeps/alpha/dl-machine.h (elf_machine_fixup_plt): DT_JMPREL and DT_PLTGOT entries are already relocated. (elf_machine_rela): Likewise for DT_SYMTAB. * sysdeps/arm/dl-machine.h (elf_machine_rel): DT_STRTAB is already relocated. * sysdeps/i386/dl-machine.h (elf_machine_rel): Likewise. * sysdeps/m68k/dl-machine.h (elf_machine_rela): Likewise. * sysdeps/sparc/sparc32/dl-machine.h (elf_machine_rela): Likewise. * sysdeps/sparc/sparc64/dl-machine.h (elf_machine_rela): Likewise. * sysdeps/powerpc/dl-machine.c (__process_machine_rela): Likewise. * sysdeps/mips/dl-machine.h (elf_machine_got_rel): Likewise. (elf_machine_got_rel): Likewise for DT_SYMTAB and DT_STRTAB. * grp/initgroups.c (initgroups): If function in current module was successful don't stop but continue to process to get all the groups.
219 lines
7.9 KiB
C
219 lines
7.9 KiB
C
/* Inline functions for dynamic linking.
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Copyright (C) 1995, 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <elf.h>
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#include <dl-machine.h>
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#include <assert.h>
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#ifndef VERSYMIDX
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# define VERSYMIDX(sym) (DT_NUM + DT_PROCNUM + DT_VERSIONTAGIDX (sym))
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#endif
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/* Global read-only variable defined in rtld.c which is nonzero if we
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shall give more warning messages. */
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extern int _dl_verbose __attribute__ ((unused));
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/* Read the dynamic section at DYN and fill in INFO with indices DT_*. */
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static inline void __attribute__ ((unused))
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elf_get_dynamic_info (ElfW(Dyn) *dyn, ElfW(Addr) l_addr,
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ElfW(Dyn) *info[DT_NUM + DT_PROCNUM + DT_VERSIONTAGNUM
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+ DT_EXTRANUM])
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{
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if (! dyn)
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return;
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while (dyn->d_tag != DT_NULL)
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{
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if (dyn->d_tag < DT_NUM)
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info[dyn->d_tag] = dyn;
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else if (dyn->d_tag >= DT_LOPROC &&
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dyn->d_tag < DT_LOPROC + DT_PROCNUM)
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info[dyn->d_tag - DT_LOPROC + DT_NUM] = dyn;
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else if ((Elf32_Word) DT_VERSIONTAGIDX (dyn->d_tag) < DT_VERSIONTAGNUM)
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info[VERSYMIDX (dyn->d_tag)] = dyn;
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else if ((Elf32_Word) DT_EXTRATAGIDX (dyn->d_tag) < DT_EXTRANUM)
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info[DT_EXTRATAGIDX (dyn->d_tag) + DT_NUM + DT_PROCNUM
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+ DT_VERSIONTAGNUM] = dyn;
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else
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assert (! "bad dynamic tag");
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++dyn;
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}
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if (info[DT_PLTGOT] != NULL)
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info[DT_PLTGOT]->d_un.d_ptr += l_addr;
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if (info[DT_STRTAB] != NULL)
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info[DT_STRTAB]->d_un.d_ptr += l_addr;
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if (info[DT_SYMTAB] != NULL)
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info[DT_SYMTAB]->d_un.d_ptr += l_addr;
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#if ! ELF_MACHINE_NO_RELA
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if (info[DT_RELA] != NULL)
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{
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assert (info[DT_RELAENT]->d_un.d_val == sizeof (ElfW(Rela)));
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info[DT_RELA]->d_un.d_ptr += l_addr;
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}
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#endif
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#if ! ELF_MACHINE_NO_REL
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if (info[DT_REL] != NULL)
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{
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assert (info[DT_RELENT]->d_un.d_val == sizeof (ElfW(Rel)));
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info[DT_REL]->d_un.d_ptr += l_addr;
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}
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#endif
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if (info[DT_PLTREL] != NULL)
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{
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#if ELF_MACHINE_NO_RELA
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assert (info[DT_PLTREL]->d_un.d_val == DT_REL);
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#elif ELF_MACHINE_NO_REL
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assert (info[DT_PLTREL]->d_un.d_val == DT_RELA);
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#else
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assert (info[DT_PLTREL]->d_un.d_val == DT_REL
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|| info[DT_PLTREL]->d_un.d_val == DT_RELA);
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#endif
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}
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if (info[DT_JMPREL] != NULL)
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info[DT_JMPREL]->d_un.d_ptr += l_addr;
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if (info[VERSYMIDX (DT_VERSYM)] != NULL)
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info[VERSYMIDX (DT_VERSYM)]->d_un.d_ptr += l_addr;
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}
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#ifdef RESOLVE
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/* Get the definitions of `elf_dynamic_do_rel' and `elf_dynamic_do_rela'.
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These functions are almost identical, so we use cpp magic to avoid
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duplicating their code. It cannot be done in a more general function
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because we must be able to completely inline. */
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/* On some machines, notably SPARC, DT_REL* includes DT_JMPREL in its
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range. Note that according to the ELF spec, this is completely legal!
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But conditionally define things so that on machines we know this will
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not happen we do something more optimal. */
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# ifdef ELF_MACHINE_PLTREL_OVERLAP
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# define _ELF_DYNAMIC_DO_RELOC(RELOC, reloc, map, do_lazy, test_rel) \
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do { \
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struct { ElfW(Addr) start, size; int lazy; } ranges[3]; \
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int ranges_index; \
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\
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ranges[0].lazy = ranges[2].lazy = 0; \
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ranges[1].lazy = 1; \
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ranges[0].size = ranges[1].size = ranges[2].size = 0; \
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\
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if ((map)->l_info[DT_##RELOC]) \
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{ \
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ranges[0].start = (map)->l_info[DT_##RELOC]->d_un.d_ptr; \
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ranges[0].size = (map)->l_info[DT_##RELOC##SZ]->d_un.d_val; \
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} \
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\
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if ((do_lazy) \
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&& (map)->l_info[DT_PLTREL] \
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&& (!test_rel || (map)->l_info[DT_PLTREL]->d_un.d_val == DT_##RELOC)) \
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{ \
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ranges[1].start = (map)->l_info[DT_JMPREL]->d_un.d_ptr; \
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ranges[1].size = (map)->l_info[DT_PLTRELSZ]->d_un.d_val; \
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ranges[2].start = ranges[1].start + ranges[1].size; \
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ranges[2].size = ranges[0].start + ranges[0].size - ranges[2].start; \
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ranges[0].size = ranges[1].start - ranges[0].start; \
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} \
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\
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for (ranges_index = 0; ranges_index < 3; ++ranges_index) \
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elf_dynamic_do_##reloc ((map), \
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ranges[ranges_index].start, \
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ranges[ranges_index].size, \
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ranges[ranges_index].lazy); \
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} while (0)
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# else
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# define _ELF_DYNAMIC_DO_RELOC(RELOC, reloc, map, do_lazy, test_rel) \
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do { \
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struct { ElfW(Addr) start, size; int lazy; } ranges[2]; \
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int ranges_index; \
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ranges[0].lazy = 0; \
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ranges[0].size = ranges[1].size = 0; \
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ranges[0].start = 0; \
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\
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if ((map)->l_info[DT_##RELOC]) \
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{ \
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ranges[0].start = (map)->l_info[DT_##RELOC]->d_un.d_ptr; \
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ranges[0].size = (map)->l_info[DT_##RELOC##SZ]->d_un.d_val; \
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} \
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if ((map)->l_info[DT_PLTREL] \
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&& (!test_rel || (map)->l_info[DT_PLTREL]->d_un.d_val == DT_##RELOC)) \
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{ \
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ElfW(Addr) start = (map)->l_info[DT_JMPREL]->d_un.d_ptr; \
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\
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if ((do_lazy) \
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/* This test does not only detect whether the relocation \
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sections are in the right order, it also checks whether \
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there is a DT_REL/DT_RELA section. */ \
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|| ranges[0].start + ranges[0].size != start) \
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{ \
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ranges[1].start = start; \
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ranges[1].size = (map)->l_info[DT_PLTRELSZ]->d_un.d_val; \
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ranges[1].lazy = (do_lazy); \
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} \
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else \
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/* Combine processing the sections. */ \
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ranges[0].size += (map)->l_info[DT_PLTRELSZ]->d_un.d_val; \
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} \
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\
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for (ranges_index = 0; ranges_index < 2; ++ranges_index) \
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elf_dynamic_do_##reloc ((map), \
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ranges[ranges_index].start, \
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ranges[ranges_index].size, \
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ranges[ranges_index].lazy); \
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} while (0)
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# endif
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# if ELF_MACHINE_NO_REL || ELF_MACHINE_NO_RELA
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# define _ELF_CHECK_REL 0
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# else
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# define _ELF_CHECK_REL 1
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# endif
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# if ! ELF_MACHINE_NO_REL
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# include "do-rel.h"
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# define ELF_DYNAMIC_DO_REL(map, lazy) \
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_ELF_DYNAMIC_DO_RELOC (REL, rel, map, lazy, _ELF_CHECK_REL)
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# else
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# define ELF_DYNAMIC_DO_REL(map, lazy) /* Nothing to do. */
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# endif
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# if ! ELF_MACHINE_NO_RELA
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# define DO_RELA
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# include "do-rel.h"
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# define ELF_DYNAMIC_DO_RELA(map, lazy) \
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_ELF_DYNAMIC_DO_RELOC (RELA, rela, map, lazy, _ELF_CHECK_REL)
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# else
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# define ELF_DYNAMIC_DO_RELA(map, lazy) /* Nothing to do. */
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# endif
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/* This can't just be an inline function because GCC is too dumb
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to inline functions containing inlines themselves. */
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# define ELF_DYNAMIC_RELOCATE(map, lazy, consider_profile) \
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do { \
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int edr_lazy = elf_machine_runtime_setup ((map), (lazy), \
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(consider_profile)); \
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ELF_DYNAMIC_DO_REL ((map), edr_lazy); \
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ELF_DYNAMIC_DO_RELA ((map), edr_lazy); \
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} while (0)
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#endif
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