169 lines
4.4 KiB
Plaintext
169 lines
4.4 KiB
Plaintext
# This shell script emits a C file. -*- C -*-
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# Copyright 2003, 2005 Free Software Foundation, Inc.
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#
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# This file is part of GLD, the Gnu Linker.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program 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
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
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#
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# This file is sourced from elf32.em, and defines extra powerpc32-elf
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# specific routines.
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#
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cat >>e${EMULATION_NAME}.c <<EOF
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#include "libbfd.h"
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#include "elf32-ppc.h"
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extern const bfd_target bfd_elf32_powerpc_vec;
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extern const bfd_target bfd_elf32_powerpcle_vec;
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/* Whether to run tls optimization. */
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static int notlsopt = 0;
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/* Chooses the correct place for .plt and .got. */
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static int old_plt = 0;
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static int old_got = 0;
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static void
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ppc_after_open (void)
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{
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if (link_info.hash->creator == &bfd_elf32_powerpc_vec
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|| link_info.hash->creator == &bfd_elf32_powerpcle_vec)
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{
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int new_plt;
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int keep_new;
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unsigned int num_plt;
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unsigned int num_got;
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lang_output_section_statement_type *os;
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lang_output_section_statement_type *plt_os[2];
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lang_output_section_statement_type *got_os[2];
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new_plt = ppc_elf_select_plt_layout (output_bfd, &link_info, old_plt);
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if (new_plt < 0)
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einfo ("%X%P: select_plt_layout problem %E\n");
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num_got = 0;
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num_plt = 0;
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for (os = &lang_output_section_statement.head->output_section_statement;
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os != NULL;
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os = os->next)
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{
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if (os->constraint == SPECIAL && strcmp (os->name, ".plt") == 0)
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{
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if (num_plt < 2)
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plt_os[num_plt] = os;
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++num_plt;
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}
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if (os->constraint == SPECIAL && strcmp (os->name, ".got") == 0)
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{
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if (num_got < 2)
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got_os[num_got] = os;
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++num_got;
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}
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}
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keep_new = new_plt == 1 ? 0 : -1;
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if (num_plt == 2)
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{
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plt_os[0]->constraint = keep_new;
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plt_os[1]->constraint = ~keep_new;
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}
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if (num_got == 2)
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{
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if (old_got)
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keep_new = -1;
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got_os[0]->constraint = keep_new;
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got_os[1]->constraint = ~keep_new;
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}
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}
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gld${EMULATION_NAME}_after_open ();
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}
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static void
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ppc_before_allocation (void)
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{
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if (link_info.hash->creator == &bfd_elf32_powerpc_vec
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|| link_info.hash->creator == &bfd_elf32_powerpcle_vec)
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{
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if (ppc_elf_tls_setup (output_bfd, &link_info) && !notlsopt)
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{
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if (!ppc_elf_tls_optimize (output_bfd, &link_info))
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{
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einfo ("%X%P: TLS problem %E\n");
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return;
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}
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}
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}
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gld${EMULATION_NAME}_before_allocation ();
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}
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static void
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gld${EMULATION_NAME}_after_allocation (void)
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{
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if ((link_info.hash->creator == &bfd_elf32_powerpc_vec
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|| link_info.hash->creator == &bfd_elf32_powerpcle_vec)
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&& !link_info.relocatable)
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{
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if (!ppc_elf_set_sdata_syms (output_bfd, &link_info))
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einfo ("%X%P: cannot set sdata syms %E\n");
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}
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}
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EOF
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# Define some shell vars to insert bits of code into the standard elf
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# parse_args and list_options functions.
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#
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PARSE_AND_LIST_PROLOGUE='
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#define OPTION_NO_TLS_OPT 301
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#define OPTION_OLD_PLT 302
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#define OPTION_OLD_GOT 303
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'
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PARSE_AND_LIST_LONGOPTS='
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{ "no-tls-optimize", no_argument, NULL, OPTION_NO_TLS_OPT },
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{ "bss-plt", no_argument, NULL, OPTION_OLD_PLT },
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{ "sdata-got", no_argument, NULL, OPTION_OLD_GOT },
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'
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PARSE_AND_LIST_OPTIONS='
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fprintf (file, _("\
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--no-tls-optimize Don'\''t try to optimize TLS accesses.\n\
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--bss-plt Force old-style BSS PLT.\n\
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--sdata-got Force GOT location just before .sdata.\n"
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));
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'
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PARSE_AND_LIST_ARGS_CASES='
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case OPTION_NO_TLS_OPT:
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notlsopt = 1;
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break;
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case OPTION_OLD_PLT:
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old_plt = 1;
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break;
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case OPTION_OLD_GOT:
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old_got = 1;
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break;
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'
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# Put these extra ppc32elf routines in ld_${EMULATION_NAME}_emulation
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#
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LDEMUL_AFTER_OPEN=ppc_after_open
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LDEMUL_BEFORE_ALLOCATION=ppc_before_allocation
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LDEMUL_AFTER_ALLOCATION=gld${EMULATION_NAME}_after_allocation
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