| # This shell script emits a C file. -*- C -*- |
| # Copyright 2002 Free Software Foundation, Inc. |
| # |
| # This file is part of GLD, the Gnu Linker. |
| # |
| # 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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| # |
| |
| # This file is sourced from elf32.em, and defines extra powerpc64-elf |
| # specific routines. |
| # |
| cat >>e${EMULATION_NAME}.c <<EOF |
| |
| #include "elf64-ppc.h" |
| |
| static int need_laying_out = 0; |
| |
| static void gld${EMULATION_NAME}_after_allocation PARAMS ((void)); |
| static void gld${EMULATION_NAME}_finish PARAMS ((void)); |
| |
| /* Call the back-end function to set TOC base after we have placed all |
| the sections. */ |
| static void |
| gld${EMULATION_NAME}_after_allocation () |
| { |
| if (!ppc64_elf_set_toc (output_bfd, &link_info)) |
| einfo ("%X%P: can not set TOC base: %E\n"); |
| } |
| |
| /* Final emulation specific call. PowerPC64 has 24 byte .plt entries, |
| and needs different call stubs for any entries that cross a 64k |
| boundary relative to the TOC. That means we need to wait until all |
| sections have been laid out to initialise the stubs. */ |
| |
| static void |
| gld${EMULATION_NAME}_finish () |
| { |
| /* e_entry on PowerPC64 points to the function descriptor for |
| _start. If _start is missing, default to the first function |
| descriptor in the .opd section. */ |
| entry_section = ".opd"; |
| |
| /* If generating a relocatable output file, then we don't have any |
| stubs. */ |
| if (link_info.relocateable) |
| return; |
| |
| /* bfd_elf64_discard_info just plays with debugging sections, |
| ie. doesn't affect any code, so we can delay resizing the |
| sections. It's likely we'll resize everything in the process of |
| adjusting stub sizes. */ |
| if (bfd_elf${ELFSIZE}_discard_info (output_bfd, &link_info)) |
| need_laying_out = 1; |
| |
| while (1) |
| { |
| /* Call into the BFD backend to do the real work. */ |
| if (! ppc64_elf_size_stubs (output_bfd, &link_info, &need_laying_out)) |
| { |
| einfo ("%X%P: can not size stub section: %E\n"); |
| return; |
| } |
| |
| if (!need_laying_out) |
| break; |
| |
| /* If we have changed the size of the stub section, then we need |
| to recalculate all the section offsets. After this, we may |
| need to adjust the stub size again. */ |
| need_laying_out = 0; |
| |
| lang_reset_memory_regions (); |
| |
| /* Resize the sections. */ |
| lang_size_sections (stat_ptr->head, abs_output_section, |
| &stat_ptr->head, 0, (bfd_vma) 0, NULL); |
| |
| /* Recalculate TOC base. */ |
| ldemul_after_allocation (); |
| |
| /* Do the assignments again. */ |
| lang_do_assignments (stat_ptr->head, abs_output_section, |
| (fill_type *) 0, (bfd_vma) 0); |
| } |
| |
| if (! ppc64_elf_build_stubs (output_bfd, &link_info)) |
| einfo ("%X%P: can not build stubs: %E\n"); |
| } |
| EOF |
| |
| # Put these extra ppc64elf routines in ld_${EMULATION_NAME}_emulation |
| # |
| LDEMUL_AFTER_ALLOCATION=gld${EMULATION_NAME}_after_allocation |
| LDEMUL_FINISH=gld${EMULATION_NAME}_finish |