diff options
Diffstat (limited to 'binutils-2.21/ld/emultempl/alphaelf.em')
| -rw-r--r-- | binutils-2.21/ld/emultempl/alphaelf.em | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/binutils-2.21/ld/emultempl/alphaelf.em b/binutils-2.21/ld/emultempl/alphaelf.em new file mode 100644 index 0000000..21064ad --- /dev/null +++ b/binutils-2.21/ld/emultempl/alphaelf.em @@ -0,0 +1,148 @@ +# This shell script emits a C file. -*- C -*- +# Copyright 2003, 2004, 2005, 2007, 2008, 2009 +# 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 alpha +# specific routines. +# +fragment <<EOF + +#include "elf/internal.h" +#include "elf/alpha.h" +#include "elf-bfd.h" + +static bfd_boolean limit_32bit; + +extern bfd_boolean elf64_alpha_use_secureplt; + + +/* Set the start address as in the Tru64 ld. */ +#define ALPHA_TEXT_START_32BIT 0x12000000 + +static void +alpha_after_open (void) +{ + if (bfd_get_flavour (link_info.output_bfd) == bfd_target_elf_flavour + && elf_object_id (link_info.output_bfd) == ALPHA_ELF_DATA) + { + unsigned int num_plt; + lang_output_section_statement_type *os; + lang_output_section_statement_type *plt_os[2]; + + 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 (num_plt == 2) + { + plt_os[0]->constraint = elf64_alpha_use_secureplt ? 0 : -1; + plt_os[1]->constraint = elf64_alpha_use_secureplt ? -1 : 0; + } + } + + gld${EMULATION_NAME}_after_open (); +} + +static void +alpha_after_parse (void) +{ + if (limit_32bit && !link_info.shared && !link_info.relocatable) + lang_section_start (".interp", + exp_binop ('+', + exp_intop (ALPHA_TEXT_START_32BIT), + exp_nameop (SIZEOF_HEADERS, NULL)), + NULL); + + after_parse_default (); +} + +static void +alpha_before_allocation (void) +{ + /* Call main function; we're just extending it. */ + gld${EMULATION_NAME}_before_allocation (); + + /* Add -relax if -O, not -r, and not explicitly disabled. */ + if (link_info.optimize && !link_info.relocatable && ! RELAXATION_DISABLED_BY_USER) + ENABLE_RELAXATION; +} + +static void +alpha_finish (void) +{ + if (limit_32bit) + elf_elfheader (link_info.output_bfd)->e_flags |= EF_ALPHA_32BIT; + + finish_default (); +} +EOF + +# Define some shell vars to insert bits of code into the standard elf +# parse_args and list_options functions. +# +PARSE_AND_LIST_PROLOGUE=' +#define OPTION_TASO 300 +#define OPTION_SECUREPLT (OPTION_TASO + 1) +#define OPTION_NO_SECUREPLT (OPTION_SECUREPLT + 1) +' + +PARSE_AND_LIST_LONGOPTS=' + { "taso", no_argument, NULL, OPTION_TASO }, + { "secureplt", no_argument, NULL, OPTION_SECUREPLT }, + { "no-secureplt", no_argument, NULL, OPTION_NO_SECUREPLT }, +' + +PARSE_AND_LIST_OPTIONS=' + fprintf (file, _("\ + --taso Load executable in the lower 31-bit addressable\n\ + virtual address range.\n\ + --secureplt Force PLT in text segment.\n\ + --no-secureplt Force PLT in data segment.\n\ +")); +' + +PARSE_AND_LIST_ARGS_CASES=' + case OPTION_TASO: + limit_32bit = 1; + break; + case OPTION_SECUREPLT: + elf64_alpha_use_secureplt = TRUE; + break; + case OPTION_NO_SECUREPLT: + elf64_alpha_use_secureplt = FALSE; + break; +' + +# Put these extra alpha routines in ld_${EMULATION_NAME}_emulation +# +LDEMUL_AFTER_OPEN=alpha_after_open +LDEMUL_AFTER_PARSE=alpha_after_parse +LDEMUL_BEFORE_ALLOCATION=alpha_before_allocation +LDEMUL_FINISH=alpha_finish |