1# This shell script emits a C file. -*- C -*- 2# Copyright (C) 2003-2016 Free Software Foundation, Inc. 3# 4# This file is part of the GNU Binutils. 5# 6# This program is free software; you can redistribute it and/or modify 7# it under the terms of the GNU General Public License as published by 8# the Free Software Foundation; either version 3 of the License, or 9# (at your option) any later version. 10# 11# This program is distributed in the hope that it will be useful, 12# but WITHOUT ANY WARRANTY; without even the implied warranty of 13# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14# GNU General Public License for more details. 15# 16# You should have received a copy of the GNU General Public License 17# along with this program; if not, write to the Free Software 18# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 19# MA 02110-1301, USA. 20# 21 22# This file is sourced from elf32.em, and defines extra alpha 23# specific routines. 24# 25fragment <<EOF 26 27#include "elf/internal.h" 28#include "elf/alpha.h" 29#include "elf-bfd.h" 30 31static bfd_boolean limit_32bit; 32 33extern bfd_boolean elf64_alpha_use_secureplt; 34 35 36/* Set the start address as in the Tru64 ld. */ 37#define ALPHA_TEXT_START_32BIT 0x12000000 38 39static void 40alpha_after_open (void) 41{ 42 if (bfd_get_flavour (link_info.output_bfd) == bfd_target_elf_flavour 43 && elf_object_id (link_info.output_bfd) == ALPHA_ELF_DATA) 44 { 45 unsigned int num_plt; 46 lang_output_section_statement_type *os; 47 lang_output_section_statement_type *plt_os[2]; 48 49 num_plt = 0; 50 for (os = &lang_output_section_statement.head->output_section_statement; 51 os != NULL; 52 os = os->next) 53 { 54 if (os->constraint == SPECIAL && strcmp (os->name, ".plt") == 0) 55 { 56 if (num_plt < 2) 57 plt_os[num_plt] = os; 58 ++num_plt; 59 } 60 } 61 62 if (num_plt == 2) 63 { 64 plt_os[0]->constraint = elf64_alpha_use_secureplt ? 0 : -1; 65 plt_os[1]->constraint = elf64_alpha_use_secureplt ? -1 : 0; 66 } 67 } 68 69 gld${EMULATION_NAME}_after_open (); 70} 71 72static void 73alpha_after_parse (void) 74{ 75 link_info.relax_pass = 2; 76 if (limit_32bit 77 && !bfd_link_pic (&link_info) 78 && !bfd_link_relocatable (&link_info)) 79 lang_section_start (".interp", 80 exp_binop ('+', 81 exp_intop (ALPHA_TEXT_START_32BIT), 82 exp_nameop (SIZEOF_HEADERS, NULL)), 83 NULL); 84 85 gld${EMULATION_NAME}_after_parse (); 86} 87 88static void 89alpha_before_allocation (void) 90{ 91 /* Call main function; we're just extending it. */ 92 gld${EMULATION_NAME}_before_allocation (); 93 94 /* Add -relax if -O, not -r, and not explicitly disabled. */ 95 if (link_info.optimize 96 && !bfd_link_relocatable (&link_info) 97 && ! RELAXATION_DISABLED_BY_USER) 98 ENABLE_RELAXATION; 99} 100 101static void 102alpha_finish (void) 103{ 104 if (limit_32bit) 105 elf_elfheader (link_info.output_bfd)->e_flags |= EF_ALPHA_32BIT; 106 107 finish_default (); 108} 109EOF 110 111# Define some shell vars to insert bits of code into the standard elf 112# parse_args and list_options functions. 113# 114PARSE_AND_LIST_PROLOGUE=' 115#define OPTION_TASO 300 116#define OPTION_SECUREPLT (OPTION_TASO + 1) 117#define OPTION_NO_SECUREPLT (OPTION_SECUREPLT + 1) 118' 119 120PARSE_AND_LIST_LONGOPTS=' 121 { "taso", no_argument, NULL, OPTION_TASO }, 122 { "secureplt", no_argument, NULL, OPTION_SECUREPLT }, 123 { "no-secureplt", no_argument, NULL, OPTION_NO_SECUREPLT }, 124' 125 126PARSE_AND_LIST_OPTIONS=' 127 fprintf (file, _("\ 128 --taso Load executable in the lower 31-bit addressable\n\ 129 virtual address range.\n\ 130 --secureplt Force PLT in text segment.\n\ 131 --no-secureplt Force PLT in data segment.\n\ 132")); 133' 134 135PARSE_AND_LIST_ARGS_CASES=' 136 case OPTION_TASO: 137 limit_32bit = 1; 138 break; 139 case OPTION_SECUREPLT: 140 elf64_alpha_use_secureplt = TRUE; 141 break; 142 case OPTION_NO_SECUREPLT: 143 elf64_alpha_use_secureplt = FALSE; 144 break; 145' 146 147# Put these extra alpha routines in ld_${EMULATION_NAME}_emulation 148# 149LDEMUL_AFTER_OPEN=alpha_after_open 150LDEMUL_AFTER_PARSE=alpha_after_parse 151LDEMUL_BEFORE_ALLOCATION=alpha_before_allocation 152LDEMUL_FINISH=alpha_finish 153