1 # This shell script emits a C file. -*- C -*-
2 # Copyright 2001, 2002, 2003, 2004, 2007 Free Software Foundation, Inc.
4 # This file is part of the GNU Binutils.
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.
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.
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,
22 # This file is sourced from elf32.em and mmo.em, used to define
23 # MMIX-specific things common to ELF and MMO.
28 /* Set up handling of linker-allocated global registers. */
31 mmix_before_allocation (void)
33 /* Call the default first. */
34 gld${EMULATION_NAME}_before_allocation ();
36 /* There's a needrelax.em which uses this ..._before_allocation-hook and
37 just has the statement below as payload. It's more of a hassle to
38 use that than to just include these two lines and take the
39 maintenance burden to keep them in sync. (Of course we lose the
40 maintenance burden of checking that it still does what we need.) */
42 /* Force -relax on (regardless of whether we're doing a relocatable
44 command_line.relax = TRUE;
46 if (!_bfd_mmix_before_linker_allocation (output_bfd, &link_info))
47 einfo ("%X%P: Internal problems setting up section %s",
48 MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME);
51 /* We need to set the VMA of the .MMIX.reg_contents section when it has
52 been allocated, and produce the final settings for the linker-generated
56 mmix_after_allocation (void)
59 = bfd_get_section_by_name (output_bfd, MMIX_REG_CONTENTS_SECTION_NAME);
60 bfd_signed_vma regvma;
62 /* If there's no register section, we don't need to do anything. On the
63 other hand, if there's a non-standard linker-script without a mapping
64 from MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME when that section is
65 present (as in the ld test "NOCROSSREFS 2"), that section (1) will be
66 orphaned; not inserted in MMIX_REG_CONTENTS_SECTION_NAME and (2) we
67 will not do the necessary preparations for those relocations that
68 caused it to be created. We'll SEGV from the latter error. The
69 former error in separation will result in a non-working binary, but
70 that's expected when you play tricks with linker scripts. The
71 "NOCROSSREFS 2" test does not run the output so it does not matter
75 = bfd_get_section_by_name (output_bfd,
76 MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME);
80 regvma = 256 * 8 - sec->size - 8;
82 /* If we start on a local register, we have too many global registers.
83 We treat this error as nonfatal (meaning processing will continue in
84 search for other errors), because it's a link error in the same way
85 as an undefined symbol. */
88 einfo ("%X%P: Too many global registers: %u, max 223\n",
89 (unsigned) sec->size / 8);
93 /* Set vma to correspond to first such register number * 8. */
94 bfd_set_section_vma (output_bfd, sec, (bfd_vma) regvma);
96 /* Simplify symbol output for the register section (without contents;
97 created for register symbols) by setting the output offset to 0.
98 This section is only present when there are register symbols. */
99 sec = bfd_get_section_by_name (output_bfd, MMIX_REG_SECTION_NAME);
101 bfd_set_section_vma (abfd, sec, 0);
103 if (!_bfd_mmix_after_linker_allocation (output_bfd, &link_info))
105 /* This is a fatal error; make einfo call not return. */
106 einfo ("%F%P: Can't finalize linker-allocated global registers\n");
111 LDEMUL_AFTER_ALLOCATION=mmix_after_allocation
112 LDEMUL_BEFORE_ALLOCATION=mmix_before_allocation