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Diffstat (limited to 'include/elf/mmix.h')
| -rw-r--r-- | include/elf/mmix.h | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/include/elf/mmix.h b/include/elf/mmix.h new file mode 100644 index 000000000..e3be26b0f --- /dev/null +++ b/include/elf/mmix.h @@ -0,0 +1,168 @@ +/* MMIX support for BFD. + Copyright (C) 2001, 2002 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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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. */ +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) +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 boolean _bfd_mmix_prepare_linker_allocated_gregs + PARAMS ((bfd *, struct bfd_link_info *)); +extern boolean _bfd_mmix_finalize_linker_allocated_gregs + PARAMS ((bfd *, struct bfd_link_info *)); +extern boolean _bfd_mmix_check_all_relocs + PARAMS ((bfd *, struct bfd_link_info *)); +#endif + +#endif /* ELF_MMIX_H */ |