d3e454b956
This is a linker-only solution to the incompatibility between shared library protected visibility variables and using .dynbss and copy relocs for non-PIC access to shared library variables. bfd/ * elf32-ppc.c (struct ppc_elf_link_hash_entry): Add has_addr16_ha and has_addr16_lo. Make has_sda_refs a bitfield. (ppc_elf_check_relocs): Set new flags. (ppc_elf_link_hash_table_create): Update default_params. (ppc_elf_adjust_dynamic_symbol): Clear protected_def in cases where we won't be making .dynbss entries or editing code. Set params->pic_fixup when we'll edit code for protected var access. (allocate_dynrelocs): Allocate got entry for edited code and discard dyn_relocs. (struct ppc_elf_relax_info): Add picfixup_size. (ppc_elf_relax_section): Rename struct one_fixup to struct one_branch_fixup. Rename fixups to branch_fixups. Size space for pic fixups. (ppc_elf_relocate_section): Edit non-PIC accessing protected visibility variables to PIC. Don't emit dyn_relocs for code we've edited. * elf32-ppc.h (struct ppc_elf_params): Add pic_fixup. ld/ * emultempl/ppc32elf.em: Handle --no-pic-fixup. (params): Init new field. (ppc_before_allocation): Enable relaxation for pic_fixup.
61 lines
2.1 KiB
C
61 lines
2.1 KiB
C
/* PowerPC-specific support for 64-bit ELF.
|
|
Copyright (C) 2003-2015 Free Software Foundation, Inc.
|
|
|
|
This file is part of BFD, the Binary File Descriptor library.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program 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 General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
|
|
MA 02110-1301, USA. */
|
|
|
|
enum ppc_elf_plt_type
|
|
{
|
|
PLT_UNSET,
|
|
PLT_OLD,
|
|
PLT_NEW,
|
|
PLT_VXWORKS
|
|
};
|
|
|
|
/* Various options passed from the linker to bfd backend. */
|
|
struct ppc_elf_params
|
|
{
|
|
/* Chooses the type of .plt. */
|
|
enum ppc_elf_plt_type plt_style;
|
|
|
|
/* Whether to emit symbols for stubs. */
|
|
int emit_stub_syms;
|
|
|
|
/* Whether to emit special stub for __tls_get_addr calls. */
|
|
int no_tls_get_addr_opt;
|
|
|
|
/* Insert trampolines for branches that won't reach their destination. */
|
|
int branch_trampolines;
|
|
|
|
/* Avoid execution falling into new page. */
|
|
int ppc476_workaround;
|
|
unsigned int pagesize_p2;
|
|
|
|
/* The bfd backend detected a non-PIC reference to a protected symbol
|
|
defined in a shared library. */
|
|
int pic_fixup;
|
|
};
|
|
|
|
void ppc_elf_link_params (struct bfd_link_info *, struct ppc_elf_params *);
|
|
int ppc_elf_select_plt_layout (bfd *, struct bfd_link_info *);
|
|
asection *ppc_elf_tls_setup (bfd *, struct bfd_link_info *);
|
|
bfd_boolean ppc_elf_tls_optimize (bfd *, struct bfd_link_info *);
|
|
void ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *);
|
|
extern bfd_boolean ppc_elf_modify_segment_map (bfd *,
|
|
struct bfd_link_info * ATTRIBUTE_UNUSED);
|
|
extern bfd_boolean ppc_elf_section_processing (bfd *, Elf_Internal_Shdr *);
|