1# This shell script emits a C file. -*- C -*-
2#   Copyright 2003, 2004, 2005 Free Software Foundation, Inc.
3#
4# This file is part of GLD, the Gnu Linker.
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 2 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, MA 02110-1301, USA.
19#
20
21# This file is sourced from elf32.em, and defines extra alpha
22# specific routines.
23#
24cat >>e${EMULATION_NAME}.c <<EOF
25
26#include "elf/internal.h"
27#include "elf/alpha.h"
28#include "elf-bfd.h"
29
30static bfd_boolean limit_32bit;
31static bfd_boolean disable_relaxation;
32
33extern bfd_boolean elf64_alpha_use_secureplt;
34extern const bfd_target bfd_elf64_alpha_vec;
35extern const bfd_target bfd_elf64_alpha_freebsd_vec;
36
37
38/* Set the start address as in the Tru64 ld.  */
39#define ALPHA_TEXT_START_32BIT 0x12000000
40
41static void
42alpha_after_open (void)
43{
44  if (link_info.hash->creator == &bfd_elf64_alpha_vec
45      || link_info.hash->creator == &bfd_elf64_alpha_freebsd_vec)
46    {
47      unsigned int num_plt;
48      lang_output_section_statement_type *os;
49      lang_output_section_statement_type *plt_os[2];
50
51      num_plt = 0;
52      for (os = &lang_output_section_statement.head->output_section_statement;
53	   os != NULL;
54	   os = os->next)
55	{
56	  if (os->constraint == SPECIAL && strcmp (os->name, ".plt") == 0)
57	    {
58	      if (num_plt < 2)
59		plt_os[num_plt] = os;
60	      ++num_plt;
61	    }
62	}
63
64      if (num_plt == 2)
65	{
66	  plt_os[0]->constraint = elf64_alpha_use_secureplt ? 0 : -1;
67	  plt_os[1]->constraint = elf64_alpha_use_secureplt ? -1 : 0;
68	}
69    }
70
71  gld${EMULATION_NAME}_after_open ();
72}
73
74static void
75alpha_after_parse (void)
76{
77  if (limit_32bit && !link_info.shared && !link_info.relocatable)
78    lang_section_start (".interp",
79			exp_binop ('+',
80				   exp_intop (ALPHA_TEXT_START_32BIT),
81				   exp_nameop (SIZEOF_HEADERS, NULL)),
82			NULL);
83}
84
85static void
86alpha_before_allocation (void)
87{
88  /* Call main function; we're just extending it.  */
89  gld${EMULATION_NAME}_before_allocation ();
90
91  /* Add -relax if -O, not -r, and not explicitly disabled.  */
92  if (link_info.optimize && !link_info.relocatable && !disable_relaxation)
93    command_line.relax = TRUE;
94}
95
96static void
97alpha_finish (void)
98{
99  if (limit_32bit)
100    elf_elfheader (output_bfd)->e_flags |= EF_ALPHA_32BIT;
101
102  gld${EMULATION_NAME}_finish ();
103}
104EOF
105
106# Define some shell vars to insert bits of code into the standard elf
107# parse_args and list_options functions.
108#
109PARSE_AND_LIST_PROLOGUE='
110#define OPTION_TASO		300
111#define OPTION_NO_RELAX		(OPTION_TASO + 1)
112#define OPTION_SECUREPLT	(OPTION_NO_RELAX + 1)
113#define OPTION_NO_SECUREPLT	(OPTION_SECUREPLT + 1)
114'
115
116PARSE_AND_LIST_LONGOPTS='
117  { "taso", no_argument, NULL, OPTION_TASO },
118  { "no-relax", no_argument, NULL, OPTION_NO_RELAX },
119  { "secureplt", no_argument, NULL, OPTION_SECUREPLT },
120  { "no-secureplt", no_argument, NULL, OPTION_NO_SECUREPLT },
121'
122
123PARSE_AND_LIST_OPTIONS='
124  fprintf (file, _("\
125  --taso		Load executable in the lower 31-bit addressable\n\
126			virtual address range.\n\
127  --no-relax		Do not relax call and gp sequences.\n\
128  --secureplt		Force PLT in text segment.\n\
129  --no-secureplt	Force PLT in data segment.\n\
130"));
131'
132
133PARSE_AND_LIST_ARGS_CASES='
134    case OPTION_TASO:
135      limit_32bit = 1;
136      break;
137    case OPTION_NO_RELAX:
138      disable_relaxation = TRUE;
139      break;
140    case OPTION_SECUREPLT:
141      elf64_alpha_use_secureplt = TRUE;
142      break;
143    case OPTION_NO_SECUREPLT:
144      elf64_alpha_use_secureplt = FALSE;
145      break;
146'
147
148# Put these extra alpha routines in ld_${EMULATION_NAME}_emulation
149#
150LDEMUL_AFTER_OPEN=alpha_after_open
151LDEMUL_AFTER_PARSE=alpha_after_parse
152LDEMUL_BEFORE_ALLOCATION=alpha_before_allocation
153LDEMUL_FINISH=alpha_finish
154