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Diffstat (limited to 'include/iprt/formats/omf.h')
| -rw-r--r-- | include/iprt/formats/omf.h | 260 |
1 files changed, 260 insertions, 0 deletions
diff --git a/include/iprt/formats/omf.h b/include/iprt/formats/omf.h new file mode 100644 index 00000000..b5ffb01d --- /dev/null +++ b/include/iprt/formats/omf.h @@ -0,0 +1,260 @@ +/* $Id: omf.h $ */ +/** @file + * IPRT - Relocatable Object Module Format (OMF). + * + * @remarks For a more details description, see specification from Tools + * Interface Standards (TIS), version 1.1 dated May 2015. + * Typically named found as OMF_v1.1.pdf. + */ + +/* + * Copyright (C) 2006-2022 Oracle and/or its affiliates. + * + * This file is part of VirtualBox base platform packages, as + * available from https://www.virtualbox.org. + * + * 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, in version 3 of the + * License. + * + * 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, see <https://www.gnu.org/licenses>. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included + * in the VirtualBox distribution, in which case the provisions of the + * CDDL are applicable instead of those of the GPL. + * + * You may elect to license modified versions of this file under the + * terms and conditions of either the GPL or the CDDL or both. + * + * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0 + */ + +#ifndef IPRT_INCLUDED_formats_omf_h +#define IPRT_INCLUDED_formats_omf_h +#ifndef RT_WITHOUT_PRAGMA_ONCE +# pragma once +#endif + +#include <iprt/stdint.h> +#include <iprt/assertcompile.h> + + +/** @defgroup grp_rt_formats_omf Relocatable Object Module Format (OMF) structures and definitions + * @ingroup grp_rt_formats + * @{ + */ + +/** + * OMF record header. + */ +#pragma pack(1) +typedef struct OMFRECHDR +{ + /** The record type. */ + uint8_t bType; + /** The record length, excluding the this header. */ + uint16_t cbLen; +} OMFRECHDR; +#pragma pack() +AssertCompileSize(OMFRECHDR, 3); +/** Pointer to an OMF header. */ +typedef OMFRECHDR *POMFRECHDR; +/** Pointer to a const OMF header. */ +typedef OMFRECHDR *PCOMFRECHDR; + +/** The max OMF record length, including the header. */ +#define OMF_MAX_RECORD_LENGTH UINT16_C(1024) + +/** The max OMF record payload, including CRC byte. */ +#define OMF_MAX_RECORD_PAYLOAD UINT16_C(1021) + + +/** @name OMF Record Types (OMFRECHDR::bType). + * @{ */ +/** Record type flag indicating 32-bit record. */ +#define OMF_REC32 UINT8_C(0x01) +/** Object file header record. + * Is followed by a length prefixed string */ +#define OMF_THEADR UINT8_C(0x80) +/** Comment record. + * Is followed by a comment type byte and a commen class byte, thereafter comes + * type specific byte sequence. */ +#define OMF_COMENT UINT8_C(0x88) +/** Local name table referenced by segment and group defintions. + * Array of length prefixed strings. Multi record. */ +#define OMF_LNAMES UINT8_C(0x96) +/** 16-bit segment definition. + * Complicated, see TIS docs. */ +#define OMF_SEGDEF16 UINT8_C(0x98) +/** 32-bit segment definition. + * Complicated, see TIS docs. */ +#define OMF_SEGDEF32 UINT8_C(0x99) +/** Segment group definition. + * Starts with an LNAMES index (one or two bytes) of the group name. Followed + * by an array which entries consists of a 0xff byte and a segment + * defintion index (one or two bytes). */ +#define OMF_GRPDEF UINT8_C(0x9a) +/** External symbol defintions. + * Array where each entry is a length prefixed symbol name string followed by a + * one or two byte type number. */ +#define OMF_EXTDEF UINT8_C(0x8c) +/** 16-but public symbol definitions. + * Starts with a group index (one or two bytes) and a segment index (ditto) + * which indicates which group/segment the symbols belong to. + * Is followed by an array with entries consiting of a length prefixed symbol + * name string, a two byte segment offset, and a one or two byte type index. */ +#define OMF_PUBDEF16 UINT8_C(0x90) +/** 32-but public symbol definitions. + * Identical to #OMF_PUBDEF16 except that the symbol offset field is four + * byte. */ +#define OMF_PUBDEF32 UINT8_C(0x91) +/** 16-bit local symbol definitions. + * Same format as #OMF_PUBDEF16. */ +#define OMF_LPUBDEF16 UINT8_C(0xb6) +/** 16-bit local symbol definitions. + * Same format as #OMF_PUBDEF32. */ +#define OMF_LPUBDEF32 UINT8_C(0xb7) +/** Logical enumerated data record (a chunk of raw segment bits). + * Starts with the index of the segment it contributes to (one or two bytes) and + * is followed by the offset into the segment of the bytes (two bytes). + * After that comes the raw data bytes. */ +#define OMF_LEDATA16 UINT8_C(0xa0) +/** Logical enumerated data record (a chunk of raw segment bits). + * Identical to #OMF_LEDATA16 except that is has a the segment offset field is + * four bytes. */ +#define OMF_LEDATA32 UINT8_C(0xa1) +/** 16-bit fixup record. + * Complicated, see TIS docs. */ +#define OMF_FIXUPP16 UINT8_C(0x9c) +/** 32-bit fixup record. + * Complicated, see TIS docs. */ +#define OMF_FIXUPP32 UINT8_C(0x9d) +/** 16-bit line numbers record. */ +#define OMF_LINNUM16 UINT8_C(0x94) +/** 32-bit line numbers record. */ +#define OMF_LINNUM32 UINT8_C(0x95) +/** 16-bit object file end record. + * Duh! wrong bitfield order. + * + * Starts with a byte bitfield indicating module type: bit 0 is set if this is a + * main program module; bit 1 is set if this is a start address is available; + * bits 2 thru 6 are reserved and must be zero; bit 7 is set to indicate + * a non-absolute start address. + * + * When bit 1 is set what follow is: A FIXUPP byte, one or two byte frame datum, + * one or two byte target datum, and a 2 byte target displacement. */ +#define OMF_MODEND16 UINT8_C(0x8a) +/** 32-bit object file end record. + * Identical to #OMF_MODEND16 except that is has a 4 byte target + * displacement field. */ +#define OMF_MODEND32 UINT8_C(0x8b) +/** @} */ + +/** @name OMF COMENT Type Flags + * @{ */ +/** Comment type: Don't remove comment when object is manipulated. */ +#define OMF_CTYP_NO_PURGE UINT8_C(0x80) +/** Comment type: Don't include in object listing. */ +#define OMF_CTYP_NO_LIST UINT8_C(0x40) +/** @} */ + +/** @name OMF COMENT Classes + * @{ */ +/** Comment class: Dependency file. + * Is followed by a dword timestamp (1980 based?) and a length prefix + * filename string. */ +#define OMF_CCLS_DEP_FILE UINT8_C(0x88) +/** Comment class: Link pass separator. + * Contains a byte with the value 01 to indicate the linker can stop pass 1 + * processing now. */ +#define OMF_CCLS_LINK_PASS_SEP UINT8_C(0xa2) +/** Comment class: Borland type information. */ +#define OMF_CCLS_BORLAND_TYPES UINT8_C(0xe3) +/** Comment class: Borland symbol information. */ +#define OMF_CCLS_BORLAND_SYMBOLS UINT8_C(0xe6) +/** Comment class: Borland source file (applies to subsequent LINNUMs). */ +#define OMF_CCLS_BORLAND_SRC_FILE UINT8_C(0xe8) +/** Comment class: Borland dependency files. */ +#define OMF_CCLS_BORLAND_DEP_FILES UINT8_C(0xe9) +/** @} */ + +/** @name OMF SEGDEF Attrib. + * @{ */ +#define OMF_SEG_ATTR_ALIGN_ABS (UINT8_C(0) << 5) /**< SEGDEF attrib A: absolute - frame and offset fields present. */ +#define OMF_SEG_ATTR_ALIGN_BYTE (UINT8_C(1) << 5) /**< SEGDEF attrib A: 1-byte alignment. */ +#define OMF_SEG_ATTR_ALIGN_WORD (UINT8_C(2) << 5) /**< SEGDEF attrib A: 2-byte alignment. */ +#define OMF_SEG_ATTR_ALIGN_PARA (UINT8_C(3) << 5) /**< SEGDEF attrib A: 16-byte alignment. */ +#define OMF_SEG_ATTR_ALIGN_PAGE (UINT8_C(4) << 5) /**< SEGDEF attrib A: 4096-byte alignment (or 256-byte). */ +#define OMF_SEG_ATTR_ALIGN_DWORD (UINT8_C(5) << 5) /**< SEGDEF attrib A: 4-byte alignment. */ +#define OMF_SEG_ATTR_ALIGN_6 (UINT8_C(6) << 5) /**< SEGDEF attrib A: not supported (load-time locatable, paragraph aligned). */ +#define OMF_SEG_ATTR_ALIGN_7 (UINT8_C(7) << 5) /**< SEGDEF attrib A: undefined. */ +#define OMF_SEG_ATTR_ALIGN_MASK (UINT8_C(7) << 5) /**< SEGDEF attrib A: Mask for the alignment field. */ +#define OMF_SEG_ATTR_ALIGN_SHIFT 5 /**< SEGDEF attrib A: Shift count for the alignment field. */ + +#define OMF_SEG_ATTR_COMB_PRIVATE (UINT8_C(0) << 2) /**< SEGDEF attrib C: Private - do not combine with anyone. */ +#define OMF_SEG_ATTR_COMB_1 (UINT8_C(1) << 2) /**< SEGDEF attrib C: Reserved */ +#define OMF_SEG_ATTR_COMB_PUBLIC (UINT8_C(2) << 2) /**< SEGDEF attrib C: Public - append at offset meeting alignment. */ +#define OMF_SEG_ATTR_COMB_3 (UINT8_C(3) << 2) /**< SEGDEF attrib C: Reserved */ +#define OMF_SEG_ATTR_COMB_PUBLIC_4 (UINT8_C(4) << 2) /**< SEGDEF attrib C: Public - append at offset meeting alignment. */ +#define OMF_SEG_ATTR_COMB_STACK (UINT8_C(5) << 2) /**< SEGDEF attrib C: Stack - same as public, but forced byte alignment. */ +#define OMF_SEG_ATTR_COMB_COMMON (UINT8_C(6) << 2) /**< SEGDEF attrib C: Common - overlay using maximum size. */ +#define OMF_SEG_ATTR_COMB_PUBLIC_7 (UINT8_C(5) << 2) /**< SEGDEF attrib C: Public - append at offset meeting alignment. */ +#define OMF_SEG_ATTR_COMB_MASK (UINT8_C(7) << 2) /**< SEGDEF attrib C: Mask for the combination field. */ +#define OMF_SEG_ATTR_COMB_SHIFT 2 /**< SEGDEF attrib C: Shift count for the combination field. */ +#define OMF_SEG_ATTR_BIG UINT8_C(2) /**< SEGDEF attrib B: Big segment 64K / 4GB. */ +#define OMF_SEG_ATTR_USE32 UINT8_C(1) /**< SEGDEF attrib P: Indicates 32-bit data or code. */ +#define OMF_SEG_ATTR_USE16 UINT8_C(0) /**< SEGDEF attrib ~P: Just for spelling out !USE32. */ +/** @} */ + + +/** @name OMF FIXUPP Locations. + * @{ */ +#define OMF_FIX_LOC_8BIT_LOW_BYTE UINT8_C(0) /**< FIXUP location: low byte (offset or displacement). */ +#define OMF_FIX_LOC_16BIT_OFFSET UINT8_C(1) /**< FIXUP location: 16-bit offset. */ +#define OMF_FIX_LOC_16BIT_SEGMENT UINT8_C(2) /**< FIXUP location: 16-bit segment. */ +#define OMF_FIX_LOC_1616FAR UINT8_C(3) /**< FIXUP location: 16:16 far pointer. */ +#define OMF_FIX_LOC_8BIT_HIGH_BYTE UINT8_C(4) /**< FIXUP location: high byte (offset). Not supported by MS/IBM. */ +#define OMF_FIX_LOC_16BIT_OFFSET_LDR UINT8_C(5) /**< FIXUP location: 16-bit loader resolved offset, same a 1 for linker. PharLab conflict. */ +#define OMF_FIX_LOC_RESERVED_FAR1632 UINT8_C(6) /**< FIXUP location: PharLab 16:32 far pointers, not defined by MS/IBM. */ +#define OMF_FIX_LOC_RESERVED_7 UINT8_C(7) /**< FIXUP location: Not defined. */ +#define OMF_FIX_LOC_RESERVED_8 UINT8_C(8) /**< FIXUP location: Not defined. */ +#define OMF_FIX_LOC_32BIT_OFFSET UINT8_C(9) /**< FIXUP location: 32-bit offset. */ +#define OMF_FIX_LOC_RESERVED_10 UINT8_C(10) /**< FIXUP location: Not defined. */ +#define OMF_FIX_LOC_1632FAR UINT8_C(11) /**< FIXUP location: 16:32 far pointer. */ +#define OMF_FIX_LOC_RESERVED_12 UINT8_C(12) /**< FIXUP location: Not defined. */ +#define OMF_FIX_LOC_32BIT_OFFSET_LDR UINT8_C(13) /**< FIXUP location: 32-bit loader resolved offset, same as 9 for linker. */ +/** @} */ +/** @name OMF FIXUPP Targets + * @{ */ +#define OMF_FIX_T_SEGDEF UINT8_C(0) /**< FIXUP target: SEGDEF index. */ +#define OMF_FIX_T_GRPDEF UINT8_C(1) /**< FIXUP target: GRPDEF index. */ +#define OMF_FIX_T_EXTDEF UINT8_C(2) /**< FIXUP target: EXTDEF index. */ +#define OMF_FIX_T_FRAME_NO UINT8_C(3) /**< FIXUP target: Explicit frame number, not supported by MS/IBM. */ +#define OMF_FIX_T_SEGDEF_NO_DISP UINT8_C(4) /**< FIXUP target: SEGDEF index only, displacement take as 0. */ +#define OMF_FIX_T_GRPDEF_NO_DISP UINT8_C(5) /**< FIXUP target: GRPDEF index only, displacement take as 0. */ +#define OMF_FIX_T_EXTDEF_NO_DISP UINT8_C(6) /**< FIXUP target: EXTDEF index only, displacement take as 0. */ +/** @} */ +/** @name OMF FIXUPP Frames + * @{ */ +#define OMF_FIX_F_SEGDEF UINT8_C(0) /**< FIXUP frame: SEGDEF index. */ +#define OMF_FIX_F_GRPDEF UINT8_C(1) /**< FIXUP frame: GRPDEF index. */ +#define OMF_FIX_F_EXTDEF UINT8_C(2) /**< FIXUP frame: EXTDEF index. */ +#define OMF_FIX_F_FRAME_NO UINT8_C(3) /**< FIXUP frame: Explicit frame number, not supported by any linkers. */ +#define OMF_FIX_F_LXDATA_SEG UINT8_C(4) /**< FIXUP frame: Determined from the data being fixed up. (No index field.) */ +#define OMF_FIX_F_TARGET_SEG UINT8_C(5) /**< FIXUP frame: Determined from the target. (No index field.) */ +#define OMF_FIX_F_RESERVED_6 UINT8_C(6) /**< FIXUP frame: Reserved. */ +/** @} */ + + +/** @} */ +#endif /* !IPRT_INCLUDED_formats_omf_h */ + |