| # This shell script emits a C file. -*- C -*- |
| # Copyright 2003, 2005, 2007, 2008, 2009, 2010, 2011, 2012 |
| # Free Software Foundation, Inc. |
| # |
| # This file is part of the GNU Binutils. |
| # |
| # 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. |
| # |
| |
| # This file is sourced from elf32.em, and defines extra powerpc32-elf |
| # specific routines. |
| # |
| fragment <<EOF |
| |
| #include "libbfd.h" |
| #include "elf32-ppc.h" |
| #include "ldlex.h" |
| |
| #define is_ppc_elf(bfd) \ |
| (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ |
| && elf_object_id (bfd) == PPC32_ELF_DATA) |
| |
| /* Whether to run tls optimization. */ |
| static int notlsopt = 0; |
| static int no_tls_get_addr_opt = 0; |
| |
| /* Whether to emit symbols for stubs. */ |
| static int emit_stub_syms = -1; |
| |
| /* Chooses the correct place for .plt and .got. */ |
| static enum ppc_elf_plt_type plt_style = PLT_UNSET; |
| static int old_got = 0; |
| |
| static void |
| ppc_after_open (void) |
| { |
| if (is_ppc_elf (link_info.output_bfd)) |
| { |
| int new_plt; |
| int keep_new; |
| unsigned int num_plt; |
| unsigned int num_got; |
| lang_output_section_statement_type *os; |
| lang_output_section_statement_type *plt_os[2]; |
| lang_output_section_statement_type *got_os[2]; |
| |
| if (emit_stub_syms < 0) |
| emit_stub_syms = link_info.emitrelocations || link_info.shared; |
| new_plt = ppc_elf_select_plt_layout (link_info.output_bfd, &link_info, |
| plt_style, emit_stub_syms); |
| if (new_plt < 0) |
| einfo ("%X%P: select_plt_layout problem %E\n"); |
| |
| num_got = 0; |
| num_plt = 0; |
| for (os = &lang_output_section_statement.head->output_section_statement; |
| os != NULL; |
| os = os->next) |
| { |
| if (os->constraint == SPECIAL && strcmp (os->name, ".plt") == 0) |
| { |
| if (num_plt < 2) |
| plt_os[num_plt] = os; |
| ++num_plt; |
| } |
| if (os->constraint == SPECIAL && strcmp (os->name, ".got") == 0) |
| { |
| if (num_got < 2) |
| got_os[num_got] = os; |
| ++num_got; |
| } |
| } |
| |
| keep_new = new_plt == 1 ? 0 : -1; |
| if (num_plt == 2) |
| { |
| plt_os[0]->constraint = keep_new; |
| plt_os[1]->constraint = ~keep_new; |
| } |
| if (num_got == 2) |
| { |
| if (old_got) |
| keep_new = -1; |
| got_os[0]->constraint = keep_new; |
| got_os[1]->constraint = ~keep_new; |
| } |
| } |
| |
| gld${EMULATION_NAME}_after_open (); |
| } |
| |
| static void |
| ppc_before_allocation (void) |
| { |
| if (is_ppc_elf (link_info.output_bfd)) |
| { |
| if (ppc_elf_tls_setup (link_info.output_bfd, &link_info, |
| no_tls_get_addr_opt) |
| && !notlsopt) |
| { |
| if (!ppc_elf_tls_optimize (link_info.output_bfd, &link_info)) |
| { |
| einfo ("%X%P: TLS problem %E\n"); |
| return; |
| } |
| } |
| } |
| |
| gld${EMULATION_NAME}_before_allocation (); |
| |
| /* Turn on relaxation if executable sections have addresses that |
| might make branches overflow. */ |
| if (RELAXATION_DISABLED_BY_DEFAULT) |
| { |
| bfd_vma low = (bfd_vma) -1; |
| bfd_vma high = 0; |
| asection *o; |
| |
| /* Run lang_size_sections (if not already done). */ |
| if (expld.phase != lang_mark_phase_enum) |
| { |
| expld.phase = lang_mark_phase_enum; |
| expld.dataseg.phase = exp_dataseg_none; |
| one_lang_size_sections_pass (NULL, FALSE); |
| lang_reset_memory_regions (); |
| } |
| |
| for (o = link_info.output_bfd->sections; o != NULL; o = o->next) |
| { |
| if ((o->flags & (SEC_ALLOC | SEC_CODE)) != (SEC_ALLOC | SEC_CODE)) |
| continue; |
| if (o->rawsize == 0) |
| continue; |
| if (low > o->vma) |
| low = o->vma; |
| if (high < o->vma + o->rawsize - 1) |
| high = o->vma + o->rawsize - 1; |
| } |
| if (high > low && high - low > (1 << 25) - 1) |
| ENABLE_RELAXATION; |
| } |
| } |
| |
| EOF |
| |
| if grep -q 'ld_elf32_spu_emulation' ldemul-list.h; then |
| fragment <<EOF |
| /* Special handling for embedded SPU executables. */ |
| extern bfd_boolean embedded_spu_file (lang_input_statement_type *, const char *); |
| static bfd_boolean gld${EMULATION_NAME}_load_symbols (lang_input_statement_type *); |
| |
| static bfd_boolean |
| ppc_recognized_file (lang_input_statement_type *entry) |
| { |
| if (embedded_spu_file (entry, "-m32")) |
| return TRUE; |
| |
| return gld${EMULATION_NAME}_load_symbols (entry); |
| } |
| |
| EOF |
| LDEMUL_RECOGNIZED_FILE=ppc_recognized_file |
| fi |
| |
| # Define some shell vars to insert bits of code into the standard elf |
| # parse_args and list_options functions. |
| # |
| PARSE_AND_LIST_PROLOGUE=${PARSE_AND_LIST_PROLOGUE}' |
| #define OPTION_NO_TLS_OPT 321 |
| #define OPTION_NO_TLS_GET_ADDR_OPT (OPTION_NO_TLS_OPT + 1) |
| #define OPTION_NEW_PLT (OPTION_NO_TLS_GET_ADDR_OPT + 1) |
| #define OPTION_OLD_PLT (OPTION_NEW_PLT + 1) |
| #define OPTION_OLD_GOT (OPTION_OLD_PLT + 1) |
| #define OPTION_STUBSYMS (OPTION_OLD_GOT + 1) |
| #define OPTION_NO_STUBSYMS (OPTION_STUBSYMS + 1) |
| ' |
| |
| PARSE_AND_LIST_LONGOPTS=${PARSE_AND_LIST_LONGOPTS}' |
| { "emit-stub-syms", no_argument, NULL, OPTION_STUBSYMS }, |
| { "no-emit-stub-syms", no_argument, NULL, OPTION_NO_STUBSYMS }, |
| { "no-tls-optimize", no_argument, NULL, OPTION_NO_TLS_OPT }, |
| { "no-tls-get-addr-optimize", no_argument, NULL, OPTION_NO_TLS_GET_ADDR_OPT }, |
| { "secure-plt", no_argument, NULL, OPTION_NEW_PLT }, |
| { "bss-plt", no_argument, NULL, OPTION_OLD_PLT }, |
| { "sdata-got", no_argument, NULL, OPTION_OLD_GOT }, |
| ' |
| |
| PARSE_AND_LIST_OPTIONS=${PARSE_AND_LIST_OPTIONS}' |
| fprintf (file, _("\ |
| --emit-stub-syms Label linker stubs with a symbol.\n\ |
| --no-emit-stub-syms Don'\''t label linker stubs with a symbol.\n\ |
| --no-tls-optimize Don'\''t try to optimize TLS accesses.\n\ |
| --no-tls-get-addr-optimize Don'\''t use a special __tls_get_addr call.\n\ |
| --secure-plt Use new-style PLT if possible.\n\ |
| --bss-plt Force old-style BSS PLT.\n\ |
| --sdata-got Force GOT location just before .sdata.\n" |
| )); |
| ' |
| |
| PARSE_AND_LIST_ARGS_CASES=${PARSE_AND_LIST_ARGS_CASES}' |
| case OPTION_STUBSYMS: |
| emit_stub_syms = 1; |
| break; |
| |
| case OPTION_NO_STUBSYMS: |
| emit_stub_syms = 0; |
| break; |
| |
| case OPTION_NO_TLS_OPT: |
| notlsopt = 1; |
| break; |
| |
| case OPTION_NO_TLS_GET_ADDR_OPT: |
| no_tls_get_addr_opt = 1; |
| break; |
| |
| case OPTION_NEW_PLT: |
| plt_style = PLT_NEW; |
| break; |
| |
| case OPTION_OLD_PLT: |
| plt_style = PLT_OLD; |
| break; |
| |
| case OPTION_OLD_GOT: |
| old_got = 1; |
| break; |
| |
| case OPTION_TRADITIONAL_FORMAT: |
| notlsopt = 1; |
| no_tls_get_addr_opt = 1; |
| return FALSE; |
| ' |
| |
| # Put these extra ppc32elf routines in ld_${EMULATION_NAME}_emulation |
| # |
| LDEMUL_AFTER_OPEN=ppc_after_open |
| LDEMUL_BEFORE_ALLOCATION=ppc_before_allocation |