source: trunk/libs/newlib/src/include/elf/mmix.h @ 467

Last change on this file since 467 was 444, checked in by satin@…, 6 years ago

add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc

File size: 6.1 KB
Line 
1/* MMIX support for BFD.
2   Copyright 2001, 2002, 2003, 2010 Free Software Foundation, Inc.
3
4   This file is part of BFD, the Binary File Descriptor library.
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 3 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,
19   MA 02110-1301, USA.  */
20
21/* This file holds definitions specific to the MMIX ELF ABI.  */
22
23#ifndef ELF_MMIX_H
24#define ELF_MMIX_H
25
26#include "elf/reloc-macros.h"
27
28/* Relocations.  See the reloc table in bfd/elf64-mmix.c for details.  */
29START_RELOC_NUMBERS (elf_mmix_reloc_type)
30  RELOC_NUMBER (R_MMIX_NONE, 0)
31
32  /* Standard absolute relocations.  */
33  RELOC_NUMBER (R_MMIX_8, 1)
34  RELOC_NUMBER (R_MMIX_16, 2)
35  RELOC_NUMBER (R_MMIX_24, 3)
36  RELOC_NUMBER (R_MMIX_32, 4)
37  RELOC_NUMBER (R_MMIX_64, 5)
38
39  /* Standard relative relocations.  */
40  RELOC_NUMBER (R_MMIX_PC_8, 6)
41  RELOC_NUMBER (R_MMIX_PC_16, 7)
42  RELOC_NUMBER (R_MMIX_PC_24, 8)
43  RELOC_NUMBER (R_MMIX_PC_32, 9)
44  RELOC_NUMBER (R_MMIX_PC_64, 10)
45
46  /* GNU extensions for C++ vtables.  */
47  RELOC_NUMBER (R_MMIX_GNU_VTINHERIT, 11)
48  RELOC_NUMBER (R_MMIX_GNU_VTENTRY, 12)
49
50  /* A GETA instruction.  */
51  RELOC_NUMBER (R_MMIX_GETA, 13)
52  RELOC_NUMBER (R_MMIX_GETA_1, 14)
53  RELOC_NUMBER (R_MMIX_GETA_2, 15)
54  RELOC_NUMBER (R_MMIX_GETA_3, 16)
55
56  /* A conditional branch instruction.  */
57  RELOC_NUMBER (R_MMIX_CBRANCH, 17)
58  RELOC_NUMBER (R_MMIX_CBRANCH_J, 18)
59  RELOC_NUMBER (R_MMIX_CBRANCH_1, 19)
60  RELOC_NUMBER (R_MMIX_CBRANCH_2, 20)
61  RELOC_NUMBER (R_MMIX_CBRANCH_3, 21)
62
63  /* A PUSHJ instruction.  */
64  RELOC_NUMBER (R_MMIX_PUSHJ, 22)
65  RELOC_NUMBER (R_MMIX_PUSHJ_1, 23)
66  RELOC_NUMBER (R_MMIX_PUSHJ_2, 24)
67  RELOC_NUMBER (R_MMIX_PUSHJ_3, 25)
68
69  /* A JMP instruction.  */
70  RELOC_NUMBER (R_MMIX_JMP, 26)
71  RELOC_NUMBER (R_MMIX_JMP_1, 27)
72  RELOC_NUMBER (R_MMIX_JMP_2, 28)
73  RELOC_NUMBER (R_MMIX_JMP_3, 29)
74
75  /* A relative address such as in a GETA or a branch.  */
76  RELOC_NUMBER (R_MMIX_ADDR19, 30)
77
78  /* A relative address such as in a JMP (only).  */
79  RELOC_NUMBER (R_MMIX_ADDR27, 31)
80
81  /* A general register or a number 0..255.  */
82  RELOC_NUMBER (R_MMIX_REG_OR_BYTE, 32)
83
84  /* A general register. */
85  RELOC_NUMBER (R_MMIX_REG, 33)
86
87  /* A global register and an offset, the global register (allocated at
88     link time) contents plus the offset made equivalent to the relocation
89     expression at link time.  The relocation must point at the Y field of
90     an instruction.  */
91  RELOC_NUMBER (R_MMIX_BASE_PLUS_OFFSET, 34)
92
93  /* A LOCAL assertion.  */
94  RELOC_NUMBER (R_MMIX_LOCAL, 35)
95
96  /* A PUSHJ instruction, generating a stub if it does not reach.  */
97  RELOC_NUMBER (R_MMIX_PUSHJ_STUBBABLE, 36)
98END_RELOC_NUMBERS (R_MMIX_max)
99
100
101/* Section Attributes.  */
102/* A section containing necessary information for relaxation.  */
103#define SHF_MMIX_CANRELAX       0x80000000
104
105/* Symbol attributes.  */
106/* A symbol with this section-index is a register.  */
107#define SHN_REGISTER    SHN_LOPROC
108
109/* This section holds contents for each initialized register, at VMA
110   regno*8.  A symbol relative to this section will be transformed to an
111   absolute symbol with the value corresponding to the register number at
112   final link time.  A symbol with a value outside the inclusive range
113   32*8 .. 254*8 is an error.  It is highly recommended to only use an
114   upper bound of 253*8 or lower as specified in the (currently
115   unspecified) ABI.  */
116#define MMIX_REG_CONTENTS_SECTION_NAME ".MMIX.reg_contents"
117
118/* At link time, a section by this name is created, expected to be
119   included in MMIX_REG_CONTENTS_SECTION_NAME in the output.  */
120#define MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME \
121 ".MMIX.reg_contents.linker_allocated"
122
123/* This is a faked section holding symbols with SHN_REGISTER.  Don't
124   confuse it with MMIX_REG_CONTENTS_SECTION_NAME; this one has no
125   contents, just values.  It is an error for a value in this section to
126   be outside the range 32..255 and it must never become an actual section
127   in an object file.  */
128#define MMIX_REG_SECTION_NAME "*REG*"
129
130/* Appended with a number N=0..65535, this is a representation of the
131   mmixal "BSPEC N" ... "ESPEC" directive pair; the contents go into an
132   ELF section by name ".MMIX.spec_data.N".  */
133#define MMIX_OTHER_SPEC_SECTION_PREFIX ".MMIX.spec_data."
134
135/* A section SECNAME is noted to start at "__.MMIX.start.SECNAME" by the
136   presence of this symbol.  Currently only implemented for ".text"
137   through the symbol "__.MMIX.start..text".  */
138#define MMIX_LOC_SECTION_START_SYMBOL_PREFIX "__.MMIX.start."
139
140/* This symbol is always a function.  */
141#define MMIX_START_SYMBOL_NAME "Main"
142
143
144/* We smuggle in a few MMO specifics here.  We don't make a specific MMO
145   file, since we can't reasonably support MMO without ELF; we have to
146   include this file anyway.  */
147
148#define MMO_TEXT_SECTION_NAME ".text"
149#define MMO_DATA_SECTION_NAME ".data"
150
151/* A definition for the flags we put in spec data in files.  A copy of our
152   own of some flags to keep immune to BFD flag changes.  See section.c of
153   2001-07-18 for flag documentation.  */
154#define MMO_SEC_ALLOC      0x001
155#define MMO_SEC_LOAD       0x002
156#define MMO_SEC_RELOC      0x004
157#define MMO_SEC_READONLY   0x010
158#define MMO_SEC_CODE       0x020
159#define MMO_SEC_DATA       0x040
160#define MMO_SEC_NEVER_LOAD 0x400
161#define MMO_SEC_IS_COMMON 0x8000
162#define MMO_SEC_DEBUGGING 0x10000
163
164#ifdef BFD_ARCH_SIZE
165extern bfd_boolean _bfd_mmix_before_linker_allocation
166  (bfd *, struct bfd_link_info *);
167extern bfd_boolean _bfd_mmix_after_linker_allocation
168  (bfd *, struct bfd_link_info *);
169extern bfd_boolean _bfd_mmix_check_all_relocs
170  (bfd *, struct bfd_link_info *);
171#endif
172
173#endif /* ELF_MMIX_H */
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