| /* MMIX support for BFD. |
| Copyright (C) 2001-2025 Free Software Foundation, Inc. |
| |
| This file is part of BFD, the Binary File Descriptor library. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| MA 02110-1301, USA. */ |
| |
| /* This file holds definitions specific to the MMIX ELF ABI. */ |
| |
| #ifndef ELF_MMIX_H |
| #define ELF_MMIX_H |
| |
| #include "elf/reloc-macros.h" |
| |
| /* Relocations. See the reloc table in bfd/elf64-mmix.c for details. */ |
| START_RELOC_NUMBERS (elf_mmix_reloc_type) |
| RELOC_NUMBER (R_MMIX_NONE, 0) |
| |
| /* Standard absolute relocations. */ |
| RELOC_NUMBER (R_MMIX_8, 1) |
| RELOC_NUMBER (R_MMIX_16, 2) |
| RELOC_NUMBER (R_MMIX_24, 3) |
| RELOC_NUMBER (R_MMIX_32, 4) |
| RELOC_NUMBER (R_MMIX_64, 5) |
| |
| /* Standard relative relocations. */ |
| RELOC_NUMBER (R_MMIX_PC_8, 6) |
| RELOC_NUMBER (R_MMIX_PC_16, 7) |
| RELOC_NUMBER (R_MMIX_PC_24, 8) |
| RELOC_NUMBER (R_MMIX_PC_32, 9) |
| RELOC_NUMBER (R_MMIX_PC_64, 10) |
| |
| /* GNU extensions for C++ vtables. */ |
| RELOC_NUMBER (R_MMIX_GNU_VTINHERIT, 11) |
| RELOC_NUMBER (R_MMIX_GNU_VTENTRY, 12) |
| |
| /* A GETA instruction. */ |
| RELOC_NUMBER (R_MMIX_GETA, 13) |
| RELOC_NUMBER (R_MMIX_GETA_1, 14) |
| RELOC_NUMBER (R_MMIX_GETA_2, 15) |
| RELOC_NUMBER (R_MMIX_GETA_3, 16) |
| |
| /* A conditional branch instruction. */ |
| RELOC_NUMBER (R_MMIX_CBRANCH, 17) |
| RELOC_NUMBER (R_MMIX_CBRANCH_J, 18) |
| RELOC_NUMBER (R_MMIX_CBRANCH_1, 19) |
| RELOC_NUMBER (R_MMIX_CBRANCH_2, 20) |
| RELOC_NUMBER (R_MMIX_CBRANCH_3, 21) |
| |
| /* A PUSHJ instruction. */ |
| RELOC_NUMBER (R_MMIX_PUSHJ, 22) |
| RELOC_NUMBER (R_MMIX_PUSHJ_1, 23) |
| RELOC_NUMBER (R_MMIX_PUSHJ_2, 24) |
| RELOC_NUMBER (R_MMIX_PUSHJ_3, 25) |
| |
| /* A JMP instruction. */ |
| RELOC_NUMBER (R_MMIX_JMP, 26) |
| RELOC_NUMBER (R_MMIX_JMP_1, 27) |
| RELOC_NUMBER (R_MMIX_JMP_2, 28) |
| RELOC_NUMBER (R_MMIX_JMP_3, 29) |
| |
| /* A relative address such as in a GETA or a branch. */ |
| RELOC_NUMBER (R_MMIX_ADDR19, 30) |
| |
| /* A relative address such as in a JMP (only). */ |
| RELOC_NUMBER (R_MMIX_ADDR27, 31) |
| |
| /* A general register or a number 0..255. */ |
| RELOC_NUMBER (R_MMIX_REG_OR_BYTE, 32) |
| |
| /* A general register. */ |
| RELOC_NUMBER (R_MMIX_REG, 33) |
| |
| /* A global register and an offset, the global register (allocated at |
| link time) contents plus the offset made equivalent to the relocation |
| expression at link time. The relocation must point at the Y field of |
| an instruction. */ |
| RELOC_NUMBER (R_MMIX_BASE_PLUS_OFFSET, 34) |
| |
| /* A LOCAL assertion. */ |
| RELOC_NUMBER (R_MMIX_LOCAL, 35) |
| |
| /* A PUSHJ instruction, generating a stub if it does not reach. */ |
| RELOC_NUMBER (R_MMIX_PUSHJ_STUBBABLE, 36) |
| END_RELOC_NUMBERS (R_MMIX_max) |
| |
| |
| /* Section Attributes. */ |
| /* A section containing necessary information for relaxation. */ |
| #define SHF_MMIX_CANRELAX 0x80000000 |
| |
| /* Symbol attributes. */ |
| /* A symbol with this section-index is a register. */ |
| #define SHN_REGISTER SHN_LOPROC |
| |
| /* This section holds contents for each initialized register, at VMA |
| regno*8. A symbol relative to this section will be transformed to an |
| absolute symbol with the value corresponding to the register number at |
| final link time. A symbol with a value outside the inclusive range |
| 32*8 .. 254*8 is an error. It is highly recommended to only use an |
| upper bound of 253*8 or lower as specified in the (currently |
| unspecified) ABI. */ |
| #define MMIX_REG_CONTENTS_SECTION_NAME ".MMIX.reg_contents" |
| |
| /* At link time, a section by this name is created, expected to be |
| included in MMIX_REG_CONTENTS_SECTION_NAME in the output. */ |
| #define MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME \ |
| ".MMIX.reg_contents.linker_allocated" |
| |
| /* This is a faked section holding symbols with SHN_REGISTER. Don't |
| confuse it with MMIX_REG_CONTENTS_SECTION_NAME; this one has no |
| contents, just values. It is an error for a value in this section to |
| be outside the range 32..255 and it must never become an actual section |
| in an object file. */ |
| #define MMIX_REG_SECTION_NAME "*REG*" |
| |
| /* Appended with a number N=0..65535, this is a representation of the |
| mmixal "BSPEC N" ... "ESPEC" directive pair; the contents go into an |
| ELF section by name ".MMIX.spec_data.N". */ |
| #define MMIX_OTHER_SPEC_SECTION_PREFIX ".MMIX.spec_data." |
| |
| /* A section SECNAME is noted to start at "__.MMIX.start.SECNAME" by the |
| presence of this symbol. Currently only implemented for ".text" |
| through the symbol "__.MMIX.start..text". */ |
| #define MMIX_LOC_SECTION_START_SYMBOL_PREFIX "__.MMIX.start." |
| |
| /* This symbol is always a function. */ |
| #define MMIX_START_SYMBOL_NAME "Main" |
| |
| |
| /* We smuggle in a few MMO specifics here. We don't make a specific MMO |
| file, since we can't reasonably support MMO without ELF; we have to |
| include this file anyway. */ |
| |
| #define MMO_TEXT_SECTION_NAME ".text" |
| #define MMO_DATA_SECTION_NAME ".data" |
| |
| /* A definition for the flags we put in spec data in files. A copy of our |
| own of some flags to keep immune to BFD flag changes. See section.c of |
| 2001-07-18 for flag documentation. */ |
| #define MMO_SEC_ALLOC 0x001 |
| #define MMO_SEC_LOAD 0x002 |
| #define MMO_SEC_RELOC 0x004 |
| #define MMO_SEC_READONLY 0x010 |
| #define MMO_SEC_CODE 0x020 |
| #define MMO_SEC_DATA 0x040 |
| #define MMO_SEC_NEVER_LOAD 0x400 |
| #define MMO_SEC_IS_COMMON 0x8000 |
| #define MMO_SEC_DEBUGGING 0x10000 |
| |
| #ifdef BFD_ARCH_SIZE |
| extern bool _bfd_mmix_before_linker_allocation |
| (bfd *, struct bfd_link_info *); |
| extern bool _bfd_mmix_after_linker_allocation |
| (bfd *, struct bfd_link_info *); |
| extern bool _bfd_mmix_check_all_relocs |
| (bfd *, struct bfd_link_info *); |
| #endif |
| |
| #endif /* ELF_MMIX_H */ |
