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3c3bdf30 | 1 | # This shell script emits a C file. -*- C -*- |
f13a99db AM |
2 | # Copyright 2001, 2002, 2003, 2004, 2007, 2008 |
3 | # Free Software Foundation, Inc. | |
3c3bdf30 | 4 | # |
f96b4a7b | 5 | # This file is part of the GNU Binutils. |
3c3bdf30 NC |
6 | # |
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 | |
f96b4a7b | 9 | # the Free Software Foundation; either version 3 of the License, or |
3c3bdf30 NC |
10 | # (at your option) any later version. |
11 | # | |
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. | |
16 | # | |
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 | |
f96b4a7b NC |
19 | # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
20 | # MA 02110-1301, USA. | |
3c3bdf30 NC |
21 | # |
22 | ||
23 | # This file is sourced from elf32.em and mmo.em, used to define | |
24 | # MMIX-specific things common to ELF and MMO. | |
25 | ||
92b93329 | 26 | fragment <<EOF |
3c3bdf30 NC |
27 | #include "elf/mmix.h" |
28 | ||
48fa4a5d HPN |
29 | /* Set up handling of linker-allocated global registers. */ |
30 | ||
31 | static void | |
0c7a8e5a | 32 | mmix_before_allocation (void) |
48fa4a5d HPN |
33 | { |
34 | /* Call the default first. */ | |
35 | gld${EMULATION_NAME}_before_allocation (); | |
36 | ||
37 | /* There's a needrelax.em which uses this ..._before_allocation-hook and | |
38 | just has the statement below as payload. It's more of a hassle to | |
39 | use that than to just include these two lines and take the | |
40 | maintenance burden to keep them in sync. (Of course we lose the | |
41 | maintenance burden of checking that it still does what we need.) */ | |
42 | ||
06335781 HPN |
43 | /* Force -relax on (regardless of whether we're doing a relocatable |
44 | link). */ | |
45 | command_line.relax = TRUE; | |
48fa4a5d | 46 | |
f13a99db | 47 | if (!_bfd_mmix_before_linker_allocation (link_info.output_bfd, &link_info)) |
48fa4a5d HPN |
48 | einfo ("%X%P: Internal problems setting up section %s", |
49 | MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME); | |
50 | } | |
3c3bdf30 NC |
51 | |
52 | /* We need to set the VMA of the .MMIX.reg_contents section when it has | |
48fa4a5d HPN |
53 | been allocated, and produce the final settings for the linker-generated |
54 | GREGs. */ | |
3c3bdf30 NC |
55 | |
56 | static void | |
0c7a8e5a | 57 | mmix_after_allocation (void) |
3c3bdf30 | 58 | { |
eaeb0a9d | 59 | asection *sec; |
8017dbcb | 60 | bfd_signed_vma regvma; |
3c3bdf30 | 61 | |
eaeb0a9d AM |
62 | gld${EMULATION_NAME}_after_allocation (); |
63 | ||
83c2d653 | 64 | /* If there's no register section, we don't need to do anything. On the |
6266d8d4 HPN |
65 | other hand, if there's a non-standard linker-script without a mapping |
66 | from MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME when that section is | |
67 | present (as in the ld test "NOCROSSREFS 2"), that section (1) will be | |
68 | orphaned; not inserted in MMIX_REG_CONTENTS_SECTION_NAME and (2) we | |
69 | will not do the necessary preparations for those relocations that | |
70 | caused it to be created. We'll SEGV from the latter error. The | |
71 | former error in separation will result in a non-working binary, but | |
72 | that's expected when you play tricks with linker scripts. The | |
73 | "NOCROSSREFS 2" test does not run the output so it does not matter | |
74 | there. */ | |
eaeb0a9d AM |
75 | sec = bfd_get_section_by_name (link_info.output_bfd, |
76 | MMIX_REG_CONTENTS_SECTION_NAME); | |
83c2d653 HPN |
77 | if (sec == NULL) |
78 | sec | |
f13a99db | 79 | = bfd_get_section_by_name (link_info.output_bfd, |
83c2d653 | 80 | MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME); |
3c3bdf30 NC |
81 | if (sec == NULL) |
82 | return; | |
83 | ||
eea6121a | 84 | regvma = 256 * 8 - sec->size - 8; |
3c3bdf30 | 85 | |
74c44237 HPN |
86 | /* If we start on a local register, we have too many global registers. |
87 | We treat this error as nonfatal (meaning processing will continue in | |
88 | search for other errors), because it's a link error in the same way | |
89 | as an undefined symbol. */ | |
3c3bdf30 | 90 | if (regvma < 32 * 8) |
74c44237 HPN |
91 | { |
92 | einfo ("%X%P: Too many global registers: %u, max 223\n", | |
eea6121a | 93 | (unsigned) sec->size / 8); |
74c44237 HPN |
94 | regvma = 32 * 8; |
95 | } | |
3c3bdf30 NC |
96 | |
97 | /* Set vma to correspond to first such register number * 8. */ | |
f13a99db | 98 | bfd_set_section_vma (link_info.output_bfd, sec, (bfd_vma) regvma); |
3c3bdf30 | 99 | |
3c3bdf30 | 100 | /* Simplify symbol output for the register section (without contents; |
48fa4a5d HPN |
101 | created for register symbols) by setting the output offset to 0. |
102 | This section is only present when there are register symbols. */ | |
f13a99db | 103 | sec = bfd_get_section_by_name (link_info.output_bfd, MMIX_REG_SECTION_NAME); |
48fa4a5d HPN |
104 | if (sec != NULL) |
105 | bfd_set_section_vma (abfd, sec, 0); | |
3c3bdf30 | 106 | |
f13a99db | 107 | if (!_bfd_mmix_after_linker_allocation (link_info.output_bfd, &link_info)) |
48fa4a5d | 108 | { |
74c44237 HPN |
109 | /* This is a fatal error; make einfo call not return. */ |
110 | einfo ("%F%P: Can't finalize linker-allocated global registers\n"); | |
48fa4a5d | 111 | } |
3c3bdf30 NC |
112 | } |
113 | EOF | |
114 | ||
48fa4a5d HPN |
115 | LDEMUL_AFTER_ALLOCATION=mmix_after_allocation |
116 | LDEMUL_BEFORE_ALLOCATION=mmix_before_allocation |