Rev 5191 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
5191 | serge | 1 | /* MMIX support for BFD. |
6324 | serge | 2 | Copyright (C) 2001-2015 Free Software Foundation, Inc. |
5191 | serge | 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. */ |
||
29 | START_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) |
||
98 | END_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 |
||
165 | extern bfd_boolean _bfd_mmix_before_linker_allocation |
||
166 | (bfd *, struct bfd_link_info *); |
||
167 | extern bfd_boolean _bfd_mmix_after_linker_allocation |
||
168 | (bfd *, struct bfd_link_info *); |
||
169 | extern bfd_boolean _bfd_mmix_check_all_relocs |
||
170 | (bfd *, struct bfd_link_info *); |
||
171 | #endif |
||
172 | |||
173 | #endif /* ELF_MMIX_H */ |