174 lines
6.1 KiB
C
174 lines
6.1 KiB
C
/* MMIX support for BFD.
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Copyright (C) 2001-2015 Free Software Foundation, Inc.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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/* This file holds definitions specific to the MMIX ELF ABI. */
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#ifndef ELF_MMIX_H
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#define ELF_MMIX_H
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#include "elf/reloc-macros.h"
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/* Relocations. See the reloc table in bfd/elf64-mmix.c for details. */
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START_RELOC_NUMBERS (elf_mmix_reloc_type)
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RELOC_NUMBER (R_MMIX_NONE, 0)
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/* Standard absolute relocations. */
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RELOC_NUMBER (R_MMIX_8, 1)
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RELOC_NUMBER (R_MMIX_16, 2)
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RELOC_NUMBER (R_MMIX_24, 3)
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RELOC_NUMBER (R_MMIX_32, 4)
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RELOC_NUMBER (R_MMIX_64, 5)
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/* Standard relative relocations. */
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RELOC_NUMBER (R_MMIX_PC_8, 6)
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RELOC_NUMBER (R_MMIX_PC_16, 7)
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RELOC_NUMBER (R_MMIX_PC_24, 8)
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RELOC_NUMBER (R_MMIX_PC_32, 9)
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RELOC_NUMBER (R_MMIX_PC_64, 10)
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/* GNU extensions for C++ vtables. */
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RELOC_NUMBER (R_MMIX_GNU_VTINHERIT, 11)
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RELOC_NUMBER (R_MMIX_GNU_VTENTRY, 12)
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/* A GETA instruction. */
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RELOC_NUMBER (R_MMIX_GETA, 13)
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RELOC_NUMBER (R_MMIX_GETA_1, 14)
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RELOC_NUMBER (R_MMIX_GETA_2, 15)
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RELOC_NUMBER (R_MMIX_GETA_3, 16)
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/* A conditional branch instruction. */
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RELOC_NUMBER (R_MMIX_CBRANCH, 17)
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RELOC_NUMBER (R_MMIX_CBRANCH_J, 18)
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RELOC_NUMBER (R_MMIX_CBRANCH_1, 19)
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RELOC_NUMBER (R_MMIX_CBRANCH_2, 20)
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RELOC_NUMBER (R_MMIX_CBRANCH_3, 21)
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/* A PUSHJ instruction. */
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RELOC_NUMBER (R_MMIX_PUSHJ, 22)
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RELOC_NUMBER (R_MMIX_PUSHJ_1, 23)
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RELOC_NUMBER (R_MMIX_PUSHJ_2, 24)
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RELOC_NUMBER (R_MMIX_PUSHJ_3, 25)
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/* A JMP instruction. */
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RELOC_NUMBER (R_MMIX_JMP, 26)
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RELOC_NUMBER (R_MMIX_JMP_1, 27)
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RELOC_NUMBER (R_MMIX_JMP_2, 28)
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RELOC_NUMBER (R_MMIX_JMP_3, 29)
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/* A relative address such as in a GETA or a branch. */
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RELOC_NUMBER (R_MMIX_ADDR19, 30)
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/* A relative address such as in a JMP (only). */
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RELOC_NUMBER (R_MMIX_ADDR27, 31)
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/* A general register or a number 0..255. */
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RELOC_NUMBER (R_MMIX_REG_OR_BYTE, 32)
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/* A general register. */
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RELOC_NUMBER (R_MMIX_REG, 33)
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/* A global register and an offset, the global register (allocated at
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link time) contents plus the offset made equivalent to the relocation
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expression at link time. The relocation must point at the Y field of
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an instruction. */
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RELOC_NUMBER (R_MMIX_BASE_PLUS_OFFSET, 34)
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/* A LOCAL assertion. */
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RELOC_NUMBER (R_MMIX_LOCAL, 35)
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/* A PUSHJ instruction, generating a stub if it does not reach. */
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RELOC_NUMBER (R_MMIX_PUSHJ_STUBBABLE, 36)
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END_RELOC_NUMBERS (R_MMIX_max)
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/* Section Attributes. */
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/* A section containing necessary information for relaxation. */
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#define SHF_MMIX_CANRELAX 0x80000000
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/* Symbol attributes. */
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/* A symbol with this section-index is a register. */
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#define SHN_REGISTER SHN_LOPROC
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/* This section holds contents for each initialized register, at VMA
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regno*8. A symbol relative to this section will be transformed to an
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absolute symbol with the value corresponding to the register number at
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final link time. A symbol with a value outside the inclusive range
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32*8 .. 254*8 is an error. It is highly recommended to only use an
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upper bound of 253*8 or lower as specified in the (currently
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unspecified) ABI. */
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#define MMIX_REG_CONTENTS_SECTION_NAME ".MMIX.reg_contents"
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/* At link time, a section by this name is created, expected to be
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included in MMIX_REG_CONTENTS_SECTION_NAME in the output. */
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#define MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME \
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".MMIX.reg_contents.linker_allocated"
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/* This is a faked section holding symbols with SHN_REGISTER. Don't
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confuse it with MMIX_REG_CONTENTS_SECTION_NAME; this one has no
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contents, just values. It is an error for a value in this section to
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be outside the range 32..255 and it must never become an actual section
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in an object file. */
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#define MMIX_REG_SECTION_NAME "*REG*"
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/* Appended with a number N=0..65535, this is a representation of the
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mmixal "BSPEC N" ... "ESPEC" directive pair; the contents go into an
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ELF section by name ".MMIX.spec_data.N". */
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#define MMIX_OTHER_SPEC_SECTION_PREFIX ".MMIX.spec_data."
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/* A section SECNAME is noted to start at "__.MMIX.start.SECNAME" by the
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presence of this symbol. Currently only implemented for ".text"
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through the symbol "__.MMIX.start..text". */
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#define MMIX_LOC_SECTION_START_SYMBOL_PREFIX "__.MMIX.start."
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/* This symbol is always a function. */
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#define MMIX_START_SYMBOL_NAME "Main"
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/* We smuggle in a few MMO specifics here. We don't make a specific MMO
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file, since we can't reasonably support MMO without ELF; we have to
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include this file anyway. */
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#define MMO_TEXT_SECTION_NAME ".text"
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#define MMO_DATA_SECTION_NAME ".data"
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/* A definition for the flags we put in spec data in files. A copy of our
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own of some flags to keep immune to BFD flag changes. See section.c of
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2001-07-18 for flag documentation. */
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#define MMO_SEC_ALLOC 0x001
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#define MMO_SEC_LOAD 0x002
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#define MMO_SEC_RELOC 0x004
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#define MMO_SEC_READONLY 0x010
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#define MMO_SEC_CODE 0x020
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#define MMO_SEC_DATA 0x040
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#define MMO_SEC_NEVER_LOAD 0x400
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#define MMO_SEC_IS_COMMON 0x8000
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#define MMO_SEC_DEBUGGING 0x10000
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#ifdef BFD_ARCH_SIZE
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extern bfd_boolean _bfd_mmix_before_linker_allocation
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(bfd *, struct bfd_link_info *);
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extern bfd_boolean _bfd_mmix_after_linker_allocation
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(bfd *, struct bfd_link_info *);
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extern bfd_boolean _bfd_mmix_check_all_relocs
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(bfd *, struct bfd_link_info *);
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#endif
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#endif /* ELF_MMIX_H */
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