Commit | Line | Data |
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3c3bdf30 | 1 | # This shell script emits a C file. -*- C -*- |
6f2750fe | 2 | # Copyright (C) 2001-2016 Free Software Foundation, Inc. |
3c3bdf30 | 3 | # |
f96b4a7b | 4 | # This file is part of the GNU Binutils. |
3c3bdf30 NC |
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 | |
f96b4a7b | 8 | # the Free Software Foundation; either version 3 of the License, or |
3c3bdf30 NC |
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 | |
f96b4a7b NC |
18 | # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
19 | # MA 02110-1301, USA. | |
3c3bdf30 NC |
20 | # |
21 | ||
22 | # This file is sourced from elf32.em and mmo.em, used to define | |
23 | # MMIX-specific things common to ELF and MMO. | |
24 | ||
92b93329 | 25 | fragment <<EOF |
3c3bdf30 NC |
26 | #include "elf/mmix.h" |
27 | ||
48fa4a5d HPN |
28 | /* Set up handling of linker-allocated global registers. */ |
29 | ||
30 | static void | |
0c7a8e5a | 31 | mmix_before_allocation (void) |
48fa4a5d HPN |
32 | { |
33 | /* Call the default first. */ | |
34 | gld${EMULATION_NAME}_before_allocation (); | |
35 | ||
36 | /* There's a needrelax.em which uses this ..._before_allocation-hook and | |
37 | just has the statement below as payload. It's more of a hassle to | |
38 | use that than to just include these two lines and take the | |
39 | maintenance burden to keep them in sync. (Of course we lose the | |
40 | maintenance burden of checking that it still does what we need.) */ | |
41 | ||
06335781 HPN |
42 | /* Force -relax on (regardless of whether we're doing a relocatable |
43 | link). */ | |
28d5f677 | 44 | ENABLE_RELAXATION; |
48fa4a5d | 45 | |
f13a99db | 46 | if (!_bfd_mmix_before_linker_allocation (link_info.output_bfd, &link_info)) |
48fa4a5d HPN |
47 | einfo ("%X%P: Internal problems setting up section %s", |
48 | MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME); | |
49 | } | |
3c3bdf30 NC |
50 | |
51 | /* We need to set the VMA of the .MMIX.reg_contents section when it has | |
48fa4a5d HPN |
52 | been allocated, and produce the final settings for the linker-generated |
53 | GREGs. */ | |
3c3bdf30 NC |
54 | |
55 | static void | |
0c7a8e5a | 56 | mmix_after_allocation (void) |
3c3bdf30 | 57 | { |
eaeb0a9d | 58 | asection *sec; |
8017dbcb | 59 | bfd_signed_vma regvma; |
3c3bdf30 | 60 | |
eaeb0a9d AM |
61 | gld${EMULATION_NAME}_after_allocation (); |
62 | ||
83c2d653 | 63 | /* If there's no register section, we don't need to do anything. On the |
6266d8d4 HPN |
64 | other hand, if there's a non-standard linker-script without a mapping |
65 | from MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME when that section is | |
66 | present (as in the ld test "NOCROSSREFS 2"), that section (1) will be | |
67 | orphaned; not inserted in MMIX_REG_CONTENTS_SECTION_NAME and (2) we | |
68 | will not do the necessary preparations for those relocations that | |
69 | caused it to be created. We'll SEGV from the latter error. The | |
70 | former error in separation will result in a non-working binary, but | |
71 | that's expected when you play tricks with linker scripts. The | |
72 | "NOCROSSREFS 2" test does not run the output so it does not matter | |
73 | there. */ | |
eaeb0a9d AM |
74 | sec = bfd_get_section_by_name (link_info.output_bfd, |
75 | MMIX_REG_CONTENTS_SECTION_NAME); | |
83c2d653 HPN |
76 | if (sec == NULL) |
77 | sec | |
f13a99db | 78 | = bfd_get_section_by_name (link_info.output_bfd, |
83c2d653 | 79 | MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME); |
3c3bdf30 NC |
80 | if (sec == NULL) |
81 | return; | |
82 | ||
eea6121a | 83 | regvma = 256 * 8 - sec->size - 8; |
3c3bdf30 | 84 | |
74c44237 HPN |
85 | /* If we start on a local register, we have too many global registers. |
86 | We treat this error as nonfatal (meaning processing will continue in | |
87 | search for other errors), because it's a link error in the same way | |
88 | as an undefined symbol. */ | |
3c3bdf30 | 89 | if (regvma < 32 * 8) |
74c44237 HPN |
90 | { |
91 | einfo ("%X%P: Too many global registers: %u, max 223\n", | |
eea6121a | 92 | (unsigned) sec->size / 8); |
74c44237 HPN |
93 | regvma = 32 * 8; |
94 | } | |
3c3bdf30 NC |
95 | |
96 | /* Set vma to correspond to first such register number * 8. */ | |
f13a99db | 97 | bfd_set_section_vma (link_info.output_bfd, sec, (bfd_vma) regvma); |
3c3bdf30 | 98 | |
3c3bdf30 | 99 | /* Simplify symbol output for the register section (without contents; |
48fa4a5d HPN |
100 | created for register symbols) by setting the output offset to 0. |
101 | This section is only present when there are register symbols. */ | |
f13a99db | 102 | sec = bfd_get_section_by_name (link_info.output_bfd, MMIX_REG_SECTION_NAME); |
48fa4a5d | 103 | if (sec != NULL) |
0a09fb4a | 104 | bfd_set_section_vma (sec->owner, sec, 0); |
3c3bdf30 | 105 | |
f13a99db | 106 | if (!_bfd_mmix_after_linker_allocation (link_info.output_bfd, &link_info)) |
48fa4a5d | 107 | { |
74c44237 HPN |
108 | /* This is a fatal error; make einfo call not return. */ |
109 | einfo ("%F%P: Can't finalize linker-allocated global registers\n"); | |
48fa4a5d | 110 | } |
3c3bdf30 NC |
111 | } |
112 | EOF | |
113 | ||
48fa4a5d HPN |
114 | LDEMUL_AFTER_ALLOCATION=mmix_after_allocation |
115 | LDEMUL_BEFORE_ALLOCATION=mmix_before_allocation |