1 # This shell script emits a C file. -*- C -*-
2 # Copyright 2003, 2004, 2005, 2007, 2008, 2009
3 # Free Software Foundation, Inc.
5 # This file is part of the GNU Binutils.
7 # This program is free software; you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation; either version 3 of the License, or
10 # (at your option) any later version.
12 # This program is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with this program; if not, write to the Free Software
19 # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
23 # This file is sourced from elf32.em, and defines extra alpha
28 #include "elf/internal.h"
29 #include "elf/alpha.h"
32 static bfd_boolean limit_32bit;
33 static bfd_boolean disable_relaxation;
35 extern bfd_boolean elf64_alpha_use_secureplt;
38 /* Set the start address as in the Tru64 ld. */
39 #define ALPHA_TEXT_START_32BIT 0x12000000
42 alpha_after_open (void)
44 if (bfd_get_flavour (link_info.output_bfd) == bfd_target_elf_flavour
45 && elf_object_id (link_info.output_bfd) == ALPHA_ELF_TDATA)
48 lang_output_section_statement_type *os;
49 lang_output_section_statement_type *plt_os[2];
52 for (os = &lang_output_section_statement.head->output_section_statement;
56 if (os->constraint == SPECIAL && strcmp (os->name, ".plt") == 0)
66 plt_os[0]->constraint = elf64_alpha_use_secureplt ? 0 : -1;
67 plt_os[1]->constraint = elf64_alpha_use_secureplt ? -1 : 0;
71 gld${EMULATION_NAME}_after_open ();
75 alpha_after_parse (void)
77 if (limit_32bit && !link_info.shared && !link_info.relocatable)
78 lang_section_start (".interp",
80 exp_intop (ALPHA_TEXT_START_32BIT),
81 exp_nameop (SIZEOF_HEADERS, NULL)),
84 after_parse_default ();
88 alpha_before_allocation (void)
90 /* Call main function; we're just extending it. */
91 gld${EMULATION_NAME}_before_allocation ();
93 /* Add -relax if -O, not -r, and not explicitly disabled. */
94 if (link_info.optimize && !link_info.relocatable && !disable_relaxation)
95 command_line.relax = TRUE;
102 elf_elfheader (link_info.output_bfd)->e_flags |= EF_ALPHA_32BIT;
108 # Define some shell vars to insert bits of code into the standard elf
109 # parse_args and list_options functions.
111 PARSE_AND_LIST_PROLOGUE='
112 #define OPTION_TASO 300
113 #define OPTION_NO_RELAX (OPTION_TASO + 1)
114 #define OPTION_SECUREPLT (OPTION_NO_RELAX + 1)
115 #define OPTION_NO_SECUREPLT (OPTION_SECUREPLT + 1)
118 PARSE_AND_LIST_LONGOPTS='
119 { "taso", no_argument, NULL, OPTION_TASO },
120 { "no-relax", no_argument, NULL, OPTION_NO_RELAX },
121 { "secureplt", no_argument, NULL, OPTION_SECUREPLT },
122 { "no-secureplt", no_argument, NULL, OPTION_NO_SECUREPLT },
125 PARSE_AND_LIST_OPTIONS='
127 --taso Load executable in the lower 31-bit addressable\n\
128 virtual address range.\n\
129 --no-relax Do not relax call and gp sequences.\n\
130 --secureplt Force PLT in text segment.\n\
131 --no-secureplt Force PLT in data segment.\n\
135 PARSE_AND_LIST_ARGS_CASES='
139 case OPTION_NO_RELAX:
140 disable_relaxation = TRUE;
142 case OPTION_SECUREPLT:
143 elf64_alpha_use_secureplt = TRUE;
145 case OPTION_NO_SECUREPLT:
146 elf64_alpha_use_secureplt = FALSE;
150 # Put these extra alpha routines in ld_${EMULATION_NAME}_emulation
152 LDEMUL_AFTER_OPEN=alpha_after_open
153 LDEMUL_AFTER_PARSE=alpha_after_parse
154 LDEMUL_BEFORE_ALLOCATION=alpha_before_allocation
155 LDEMUL_FINISH=alpha_finish