Commit | Line | Data |
---|---|---|
3c3bdf30 | 1 | /* MMIX support for BFD. |
fd6ba1fc | 2 | Copyright 2001, 2002, 2003 Free Software Foundation, Inc. |
3c3bdf30 NC |
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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
19 | ||
20 | /* This file holds definitions specific to the MMIX ELF ABI. */ | |
21 | #ifndef ELF_MMIX_H | |
22 | #define ELF_MMIX_H | |
23 | ||
24 | #include "elf/reloc-macros.h" | |
25 | ||
f4b9d8ef | 26 | /* Relocations. See the reloc table in bfd/elf64-mmix.c for details. */ |
3c3bdf30 NC |
27 | START_RELOC_NUMBERS (elf_mmix_reloc_type) |
28 | RELOC_NUMBER (R_MMIX_NONE, 0) | |
29 | ||
30 | /* Standard absolute relocations. */ | |
31 | RELOC_NUMBER (R_MMIX_8, 1) | |
32 | RELOC_NUMBER (R_MMIX_16, 2) | |
33 | RELOC_NUMBER (R_MMIX_24, 3) | |
34 | RELOC_NUMBER (R_MMIX_32, 4) | |
35 | RELOC_NUMBER (R_MMIX_64, 5) | |
36 | ||
37 | /* Standard relative relocations. */ | |
38 | RELOC_NUMBER (R_MMIX_PC_8, 6) | |
39 | RELOC_NUMBER (R_MMIX_PC_16, 7) | |
40 | RELOC_NUMBER (R_MMIX_PC_24, 8) | |
41 | RELOC_NUMBER (R_MMIX_PC_32, 9) | |
42 | RELOC_NUMBER (R_MMIX_PC_64, 10) | |
43 | ||
44 | /* GNU extensions for C++ vtables. */ | |
45 | RELOC_NUMBER (R_MMIX_GNU_VTINHERIT, 11) | |
46 | RELOC_NUMBER (R_MMIX_GNU_VTENTRY, 12) | |
47 | ||
48 | /* A GETA instruction. */ | |
49 | RELOC_NUMBER (R_MMIX_GETA, 13) | |
50 | RELOC_NUMBER (R_MMIX_GETA_1, 14) | |
51 | RELOC_NUMBER (R_MMIX_GETA_2, 15) | |
52 | RELOC_NUMBER (R_MMIX_GETA_3, 16) | |
53 | ||
54 | /* A conditional branch instruction. */ | |
55 | RELOC_NUMBER (R_MMIX_CBRANCH, 17) | |
56 | RELOC_NUMBER (R_MMIX_CBRANCH_J, 18) | |
57 | RELOC_NUMBER (R_MMIX_CBRANCH_1, 19) | |
58 | RELOC_NUMBER (R_MMIX_CBRANCH_2, 20) | |
59 | RELOC_NUMBER (R_MMIX_CBRANCH_3, 21) | |
60 | ||
61 | /* A PUSHJ instruction. */ | |
62 | RELOC_NUMBER (R_MMIX_PUSHJ, 22) | |
63 | RELOC_NUMBER (R_MMIX_PUSHJ_1, 23) | |
64 | RELOC_NUMBER (R_MMIX_PUSHJ_2, 24) | |
65 | RELOC_NUMBER (R_MMIX_PUSHJ_3, 25) | |
66 | ||
67 | /* A JMP instruction. */ | |
68 | RELOC_NUMBER (R_MMIX_JMP, 26) | |
69 | RELOC_NUMBER (R_MMIX_JMP_1, 27) | |
70 | RELOC_NUMBER (R_MMIX_JMP_2, 28) | |
71 | RELOC_NUMBER (R_MMIX_JMP_3, 29) | |
72 | ||
73 | /* A relative address such as in a GETA or a branch. */ | |
74 | RELOC_NUMBER (R_MMIX_ADDR19, 30) | |
75 | ||
76 | /* A relative address such as in a JMP (only). */ | |
77 | RELOC_NUMBER (R_MMIX_ADDR27, 31) | |
78 | ||
79 | /* A general register or a number 0..255. */ | |
80 | RELOC_NUMBER (R_MMIX_REG_OR_BYTE, 32) | |
81 | ||
82 | /* A general register. */ | |
83 | RELOC_NUMBER (R_MMIX_REG, 33) | |
84 | ||
b52a8679 HPN |
85 | /* A global register and an offset, the global register (allocated at |
86 | link time) contents plus the offset made equivalent to the relocation | |
87 | expression at link time. The relocation must point at the Y field of | |
88 | an instruction. */ | |
3c3bdf30 NC |
89 | RELOC_NUMBER (R_MMIX_BASE_PLUS_OFFSET, 34) |
90 | ||
91 | /* A LOCAL assertion. */ | |
92 | RELOC_NUMBER (R_MMIX_LOCAL, 35) | |
f4b9d8ef HPN |
93 | |
94 | /* A PUSHJ instruction, generating a stub if it does not reach. */ | |
95 | RELOC_NUMBER (R_MMIX_PUSHJ_STUBBABLE, 36) | |
3c3bdf30 NC |
96 | END_RELOC_NUMBERS (R_MMIX_max) |
97 | ||
98 | ||
99 | /* Section Attributes. */ | |
100 | /* A section containing necessary information for relaxation. */ | |
101 | #define SHF_MMIX_CANRELAX 0x80000000 | |
102 | ||
103 | /* Symbol attributes. */ | |
104 | /* A symbol with this section-index is a register. */ | |
105 | #define SHN_REGISTER SHN_LOPROC | |
106 | ||
107 | /* This section holds contents for each initialized register, at VMA | |
108 | regno*8. A symbol relative to this section will be transformed to an | |
109 | absolute symbol with the value corresponding to the register number at | |
110 | final link time. A symbol with a value outside the inclusive range | |
111 | 32*8 .. 254*8 is an error. It is highly recommended to only use an | |
112 | upper bound of 253*8 or lower as specified in the (currently | |
113 | unspecified) ABI. */ | |
114 | #define MMIX_REG_CONTENTS_SECTION_NAME ".MMIX.reg_contents" | |
115 | ||
b52a8679 HPN |
116 | /* At link time, a section by this name is created, expected to be |
117 | included in MMIX_REG_CONTENTS_SECTION_NAME in the output. */ | |
118 | #define MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME \ | |
119 | ".MMIX.reg_contents.linker_allocated" | |
120 | ||
3c3bdf30 NC |
121 | /* This is a faked section holding symbols with SHN_REGISTER. Don't |
122 | confuse it with MMIX_REG_CONTENTS_SECTION_NAME; this one has no | |
123 | contents, just values. It is an error for a value in this section to | |
124 | be outside the range 32..255 and it must never become an actual section | |
125 | in an object file. */ | |
126 | #define MMIX_REG_SECTION_NAME "*REG*" | |
127 | ||
128 | /* Appended with a number N=0..65535, this is a representation of the | |
129 | mmixal "BSPEC N" ... "ESPEC" directive pair; the contents go into an | |
130 | ELF section by name ".MMIX.spec_data.N". */ | |
131 | #define MMIX_OTHER_SPEC_SECTION_PREFIX ".MMIX.spec_data." | |
132 | ||
133 | /* A section SECNAME is noted to start at "__.MMIX.start.SECNAME" by the | |
134 | presence of this symbol. Currently only implemented for ".text" | |
135 | through the symbol "__.MMIX.start..text". */ | |
136 | #define MMIX_LOC_SECTION_START_SYMBOL_PREFIX "__.MMIX.start." | |
137 | ||
138 | /* This symbol is always a function. */ | |
139 | #define MMIX_START_SYMBOL_NAME "Main" | |
140 | ||
141 | ||
142 | /* We smuggle in a few MMO specifics here. We don't make a specific MMO | |
143 | file, since we can't reasonably support MMO without ELF; we have to | |
144 | include this file anyway. */ | |
145 | ||
146 | #define MMO_TEXT_SECTION_NAME ".text" | |
147 | #define MMO_DATA_SECTION_NAME ".data" | |
148 | ||
149 | /* A definition for the flags we put in spec data in files. A copy of our | |
150 | own of some flags to keep immune to BFD flag changes. See section.c of | |
151 | 2001-07-18 for flag documentation. */ | |
152 | #define MMO_SEC_ALLOC 0x001 | |
153 | #define MMO_SEC_LOAD 0x002 | |
154 | #define MMO_SEC_RELOC 0x004 | |
155 | #define MMO_SEC_READONLY 0x010 | |
156 | #define MMO_SEC_CODE 0x020 | |
157 | #define MMO_SEC_DATA 0x040 | |
158 | #define MMO_SEC_NEVER_LOAD 0x400 | |
159 | #define MMO_SEC_IS_COMMON 0x8000 | |
160 | #define MMO_SEC_DEBUGGING 0x10000 | |
161 | ||
b52a8679 | 162 | #ifdef BFD_ARCH_SIZE |
f4b9d8ef | 163 | extern bfd_boolean _bfd_mmix_before_linker_allocation |
fd6ba1fc | 164 | (bfd *, struct bfd_link_info *); |
f4b9d8ef | 165 | extern bfd_boolean _bfd_mmix_after_linker_allocation |
fd6ba1fc | 166 | (bfd *, struct bfd_link_info *); |
b34976b6 | 167 | extern bfd_boolean _bfd_mmix_check_all_relocs |
fd6ba1fc | 168 | (bfd *, struct bfd_link_info *); |
b52a8679 HPN |
169 | #endif |
170 | ||
3c3bdf30 | 171 | #endif /* ELF_MMIX_H */ |