diff options
Diffstat (limited to 'src/VBox/ValidationKit/bootsectors/bs3kit/VBoxBs3ObjConverter.cpp')
| -rw-r--r-- | src/VBox/ValidationKit/bootsectors/bs3kit/VBoxBs3ObjConverter.cpp | 5530 |
1 files changed, 5530 insertions, 0 deletions
diff --git a/src/VBox/ValidationKit/bootsectors/bs3kit/VBoxBs3ObjConverter.cpp b/src/VBox/ValidationKit/bootsectors/bs3kit/VBoxBs3ObjConverter.cpp new file mode 100644 index 00000000..ce789b21 --- /dev/null +++ b/src/VBox/ValidationKit/bootsectors/bs3kit/VBoxBs3ObjConverter.cpp @@ -0,0 +1,5530 @@ +/* $Id: VBoxBs3ObjConverter.cpp $ */ +/** @file + * VirtualBox Validation Kit - Boot Sector 3 object file convert. + */ + +/* + * Copyright (C) 2006-2023 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 + */ + + +/********************************************************************************************************************************* +* Header Files * +*********************************************************************************************************************************/ +#include <stdio.h> +#include <string.h> +#include <stdlib.h> +#include <errno.h> +#include <iprt/types.h> +#include <iprt/ctype.h> +#include <iprt/assert.h> +#include <iprt/sort.h> +#include <iprt/x86.h> + +#include <iprt/formats/elf64.h> +#include <iprt/formats/elf-amd64.h> +#include <iprt/formats/pecoff.h> +#include <iprt/formats/omf.h> +#include <iprt/formats/codeview.h> + + +/********************************************************************************************************************************* +* Defined Constants And Macros * +*********************************************************************************************************************************/ +#if ARCH_BITS == 64 && !defined(RT_OS_WINDOWS) && !defined(RT_OS_DARWIN) +# define ELF_FMT_X64 "lx" +# define ELF_FMT_D64 "ld" +#else +# define ELF_FMT_X64 "llx" +# define ELF_FMT_D64 "lld" +#endif + +/** Compares an OMF string with a constant string. */ +#define IS_OMF_STR_EQUAL_EX(a_cch1, a_pch1, a_szConst2) \ + ( (a_cch1) == sizeof(a_szConst2) - 1 && memcmp(a_pch1, a_szConst2, sizeof(a_szConst2) - 1) == 0 ) + +/** Compares an OMF string with a constant string. */ +#define IS_OMF_STR_EQUAL(a_pchZeroPrefixed, a_szConst2) \ + IS_OMF_STR_EQUAL_EX((uint8_t)((a_pchZeroPrefixed)[0]), &((a_pchZeroPrefixed)[1]), a_szConst2) + + +/********************************************************************************************************************************* +* Global Variables * +*********************************************************************************************************************************/ +/** Verbosity level. */ +static unsigned g_cVerbose = 0; +/** Indicates that it's output from the 16-bit watcom C or C++ compiler. + * We will do some massaging for fixup records when this is used. */ +static bool g_f16BitWatcomC = false; + + +/* + * Minimal assertion support. + */ + +RTDECL(bool) RTAssertShouldPanic(void) +{ + return true; +} + + +RTDECL(void) RTAssertMsg1Weak(const char *pszExpr, unsigned uLine, const char *pszFile, const char *pszFunction) +{ + fprintf(stderr, + "VBoxBs3ObjConverter: assertion failed in %s (%s:%u)!\n" + "VBoxBs3ObjConverter: %s\n", + pszFunction, pszFile, uLine, pszExpr); +} + + +/** + * Opens a file for binary reading or writing. + * + * @returns File stream handle. + * @param pszFile The name of the file. + * @param fWrite Whether to open for writing or reading. + */ +static FILE *openfile(const char *pszFile, bool fWrite) +{ +#if defined(RT_OS_WINDOWS) || defined(RT_OS_OS2) + FILE *pFile = fopen(pszFile, fWrite ? "wb" : "rb"); +#else + FILE *pFile = fopen(pszFile, fWrite ? "w" : "r"); +#endif + if (!pFile) + fprintf(stderr, "error: Failed to open '%s' for %s: %s (%d)\n", + pszFile, fWrite ? "writing" : "reading", strerror(errno), errno); + return pFile; +} + + +/** + * Read the given file into memory. + * + * @returns true on success, false on failure. + * @param pszFile The file to read. + * @param ppvFile Where to return the memory. + * @param pcbFile Where to return the size. + */ +static bool readfile(const char *pszFile, void **ppvFile, size_t *pcbFile) +{ + FILE *pFile = openfile(pszFile, false); + if (pFile) + { + /* + * Figure the size. + */ + if (fseek(pFile, 0, SEEK_END) == 0) + { + long cbFile = ftell(pFile); + if (cbFile > 0) + { + if (fseek(pFile, SEEK_SET, 0) == 0) + { + /* + * Allocate and read content. + */ + void *pvFile = malloc((size_t)cbFile); + if (pvFile) + { + if (fread(pvFile, cbFile, 1, pFile) == 1) + { + *ppvFile = pvFile; + *pcbFile = (size_t)cbFile; + fclose(pFile); + return true; + } + free(pvFile); + fprintf(stderr, "error: fread failed in '%s': %s (%d)\n", pszFile, strerror(errno), errno); + } + else + fprintf(stderr, "error: failed to allocate %ld bytes of memory for '%s'\n", cbFile, pszFile); + } + else + fprintf(stderr, "error: fseek #2 failed in '%s': %s (%d)\n", pszFile, strerror(errno), errno); + } + else + fprintf(stderr, "error: ftell failed in '%s': %s (%d)\n", pszFile, strerror(errno), errno); + } + else + fprintf(stderr, "error: fseek #1 failed in '%s': %s (%d)\n", pszFile, strerror(errno), errno); + fclose(pFile); + } + return false; +} + + +/** + * Write the given file into memory. + * + * @returns true on success, false on failure. + * @param pszFile The file to write. + * @param pvFile Where to return the memory. + * @param cbFile Where to return the size. + */ +static bool writefile(const char *pszFile, void const *pvFile, size_t cbFile) +{ + remove(pszFile); + + FILE *pFile = openfile(pszFile, true); + if (pFile) + { + if (fwrite(pvFile, cbFile, 1, pFile) == 1) + { + fclose(pFile); + return true; + } + fprintf(stderr, "error: fwrite failed in '%s': %s (%d)\n", pszFile, strerror(errno), errno); + fclose(pFile); + } + return false; +} + + +/** + * Reports an error and returns false. + * + * @returns false + * @param pszFile The filename. + * @param pszFormat The message format string. + * @param ... Format arguments. + */ +static bool error(const char *pszFile, const char *pszFormat, ...) +{ + fflush(stdout); + fprintf(stderr, "error: %s: ", pszFile); + va_list va; + va_start(va, pszFormat); + vfprintf(stderr, pszFormat, va); + va_end(va); + return false; +} + + + +/********************************************************************************************************************************* +* Common OMF Writer * +*********************************************************************************************************************************/ + +/** Entry for each segment/section in the source format for mapping it to a + * segment defintion. */ +typedef struct OMFTOSEGDEF +{ + /** The segment defintion index of the section, UINT16_MAX if not translated. */ + uint16_t iSegDef; + /** The group index for this segment, UINT16_MAX if not applicable. */ + uint16_t iGrpDef; + /** The class name table entry, UINT16_MAX if not applicable. */ + uint16_t iClassNm; + /** The group name for this segment, UINT16_MAX if not applicable. */ + uint16_t iGrpNm; + /** The group name for this segment, UINT16_MAX if not applicable. */ + uint16_t iSegNm; + /** The number of public definitions for this segment. */ + uint32_t cPubDefs; + /** The segment name (OMF). */ + char *pszName; +} OMFTOSEGDEF; +/** Pointer to a segment/section to segdef mapping. */ +typedef OMFTOSEGDEF *POMFTOSEGDEF; + +/** Symbol table translation type. */ +typedef enum OMFSYMTYPE +{ + /** Invalid symbol table entry (aux sym). */ + OMFSYMTYPE_INVALID = 0, + /** Ignored. */ + OMFSYMTYPE_IGNORED, + /** A public defintion. */ + OMFSYMTYPE_PUBDEF, + /** An external definition. */ + OMFSYMTYPE_EXTDEF, + /** A segment reference for fixups. */ + OMFSYMTYPE_SEGDEF, + /** Internal symbol that may be used for fixups. */ + OMFSYMTYPE_INTERNAL +} OMFSYMTYPE; + +/** Symbol table translation. */ +typedef struct OMFSYMBOL +{ + /** What this source symbol table entry should be translated into. */ + OMFSYMTYPE enmType; + /** The OMF table index. UINT16_MAX if not applicable. */ + uint16_t idx; + /** The OMF segment definition index. */ + uint16_t idxSegDef; + /** The OMF group definition index. */ + uint16_t idxGrpDef; +} OMFSYMBOL; +/** Pointer to an source symbol table translation entry. */ +typedef OMFSYMBOL *POMFSYMBOL; + +/** OMF Writer LNAME lookup record. */ +typedef struct OMFWRLNAME +{ + /** Pointer to the next entry with the name hash. */ + struct OMFWRLNAME *pNext; + /** The LNAMES index number. */ + uint16_t idxName; + /** The name length. */ + uint8_t cchName; + /** The name (variable size). */ + char szName[1]; +} OMFWRLNAME; +/** Pointer to the a OMF writer LNAME lookup record. */ +typedef OMFWRLNAME *POMFWRLNAME; + +/** + * OMF converter & writer instance. + */ +typedef struct OMFWRITER +{ + /** The source file name (for bitching). */ + const char *pszSrc; + /** The destination output file. */ + FILE *pDst; + + /** Pointer to the table mapping from source segments/section to segdefs. */ + POMFTOSEGDEF paSegments; + /** Number of source segments/sections. */ + uint32_t cSegments; + + /** Number of entries in the source symbol table. */ + uint32_t cSymbols; + /** Pointer to the table mapping from source symbols to OMF stuff. */ + POMFSYMBOL paSymbols; + + /** LEDATA segment offset. */ + uint32_t offSeg; + /** Start of the current LEDATA record. */ + uint32_t offSegRec; + /** The LEDATA end segment offset. */ + uint32_t offSegEnd; + /** The current LEDATA segment. */ + uint16_t idx; + + /** The index of the next list of names entry. */ + uint16_t idxNextName; + + /** The current record size. */ + uint16_t cbRec; + /** The current record type */ + uint8_t bType; + /** The record data buffer (too large, but whatever). */ + uint8_t abData[_1K + 64]; + + /** Current FIXUPP entry. */ + uint8_t iFixupp; + /** FIXUPP records being prepared for LEDATA currently stashed in abData. + * We may have to adjust addend values in the LEDATA when converting to OMF + * fixups. */ + struct + { + uint16_t cbRec; + uint8_t abData[_1K + 64]; + uint8_t abAlign[2]; /**< Alignment padding. */ + } aFixupps[3]; + + /** The index of the FLAT group. */ + uint16_t idxGrpFlat; + /** The EXTDEF index of the __ImageBase symbol. */ + uint16_t idxExtImageBase; + + /** LNAME lookup hash table. To avoid too many duplicates. */ + POMFWRLNAME apNameLookup[63]; +} OMFWRITE; +/** Pointer to an OMF writer. */ +typedef OMFWRITE *POMFWRITER; + + +/** + * Creates an OMF writer instance. + */ +static POMFWRITER omfWriter_Create(const char *pszSrc, uint32_t cSegments, uint32_t cSymbols, FILE *pDst) +{ + POMFWRITER pThis = (POMFWRITER)calloc(sizeof(OMFWRITER), 1); + if (pThis) + { + pThis->pszSrc = pszSrc; + pThis->idxNextName = 1; /* We start counting at 1. */ + pThis->cSegments = cSegments; + pThis->paSegments = (POMFTOSEGDEF)calloc(sizeof(OMFTOSEGDEF), cSegments); + if (pThis->paSegments) + { + pThis->cSymbols = cSymbols; + pThis->paSymbols = (POMFSYMBOL)calloc(sizeof(OMFSYMBOL), cSymbols); + if (pThis->paSymbols) + { + pThis->pDst = pDst; + return pThis; + } + free(pThis->paSegments); + } + free(pThis); + } + error(pszSrc, "Out of memory!\n"); + return NULL; +} + +/** + * Destroys the given OMF writer instance. + * @param pThis OMF writer instance. + */ +static void omfWriter_Destroy(POMFWRITER pThis) +{ + free(pThis->paSymbols); + + for (uint32_t i = 0; i < pThis->cSegments; i++) + if (pThis->paSegments[i].pszName) + free(pThis->paSegments[i].pszName); + + free(pThis->paSegments); + + uint32_t i = RT_ELEMENTS(pThis->apNameLookup); + while (i-- > 0) + { + POMFWRLNAME pNext = pThis->apNameLookup[i]; + pThis->apNameLookup[i] = NULL; + while (pNext) + { + POMFWRLNAME pFree = pNext; + pNext = pNext->pNext; + free(pFree); + } + } + + free(pThis); +} + +static bool omfWriter_RecBegin(POMFWRITER pThis, uint8_t bType) +{ + pThis->bType = bType; + pThis->cbRec = 0; + return true; +} + +static bool omfWriter_RecAddU8(POMFWRITER pThis, uint8_t b) +{ + if (pThis->cbRec < OMF_MAX_RECORD_PAYLOAD) + { + pThis->abData[pThis->cbRec++] = b; + return true; + } + return error(pThis->pszSrc, "Exceeded max OMF record length (bType=%#x)!\n", pThis->bType); +} + +static bool omfWriter_RecAddU16(POMFWRITER pThis, uint16_t u16) +{ + if (pThis->cbRec + 2U <= OMF_MAX_RECORD_PAYLOAD) + { + pThis->abData[pThis->cbRec++] = (uint8_t)u16; + pThis->abData[pThis->cbRec++] = (uint8_t)(u16 >> 8); + return true; + } + return error(pThis->pszSrc, "Exceeded max OMF record length (bType=%#x)!\n", pThis->bType); +} + +static bool omfWriter_RecAddU32(POMFWRITER pThis, uint32_t u32) +{ + if (pThis->cbRec + 4U <= OMF_MAX_RECORD_PAYLOAD) + { + pThis->abData[pThis->cbRec++] = (uint8_t)u32; + pThis->abData[pThis->cbRec++] = (uint8_t)(u32 >> 8); + pThis->abData[pThis->cbRec++] = (uint8_t)(u32 >> 16); + pThis->abData[pThis->cbRec++] = (uint8_t)(u32 >> 24); + return true; + } + return error(pThis->pszSrc, "Exceeded max OMF record length (bType=%#x)!\n", pThis->bType); +} + +static bool omfWriter_RecAddIdx(POMFWRITER pThis, uint16_t idx) +{ + if (idx < 128) + return omfWriter_RecAddU8(pThis, (uint8_t)idx); + if (idx < _32K) + return omfWriter_RecAddU8(pThis, (uint8_t)(idx >> 8) | 0x80) + && omfWriter_RecAddU8(pThis, (uint8_t)idx); + return error(pThis->pszSrc, "Index out of range %#x\n", idx); +} + +static bool omfWriter_RecAddBytes(POMFWRITER pThis, const void *pvData, size_t cbData) +{ + const uint16_t cbNasmHack = OMF_MAX_RECORD_PAYLOAD + 1; + if (cbData + pThis->cbRec <= cbNasmHack) + { + memcpy(&pThis->abData[pThis->cbRec], pvData, cbData); + pThis->cbRec += (uint16_t)cbData; + return true; + } + return error(pThis->pszSrc, "Exceeded max OMF record length (bType=%#x, cbData=%#x, cbRec=%#x, max=%#x)!\n", + pThis->bType, (unsigned)cbData, pThis->cbRec, OMF_MAX_RECORD_PAYLOAD); +} + +static bool omfWriter_RecAddStringNEx(POMFWRITER pThis, const char *pchString, size_t cchString, bool fPrependUnderscore) +{ + if (cchString < 256) + { + return omfWriter_RecAddU8(pThis, (uint8_t)cchString + fPrependUnderscore) + && (!fPrependUnderscore || omfWriter_RecAddU8(pThis, '_')) + && omfWriter_RecAddBytes(pThis, pchString, cchString); + } + return error(pThis->pszSrc, "String too long (%u bytes): '%*.*s'\n", + (unsigned)cchString, (int)cchString, (int)cchString, pchString); +} + +static bool omfWriter_RecAddStringN(POMFWRITER pThis, const char *pchString, size_t cchString) +{ + return omfWriter_RecAddStringNEx(pThis, pchString, cchString, false /*fPrependUnderscore*/); +} + +static bool omfWriter_RecAddString(POMFWRITER pThis, const char *pszString) +{ + return omfWriter_RecAddStringNEx(pThis, pszString, strlen(pszString), false /*fPrependUnderscore*/); +} + +static bool omfWriter_RecEnd(POMFWRITER pThis, bool fAddCrc) +{ + if ( !fAddCrc + || omfWriter_RecAddU8(pThis, 0)) + { + OMFRECHDR RecHdr = { pThis->bType, RT_H2LE_U16(pThis->cbRec) }; + if ( fwrite(&RecHdr, sizeof(RecHdr), 1, pThis->pDst) == 1 + && fwrite(pThis->abData, pThis->cbRec, 1, pThis->pDst) == 1) + { + pThis->bType = 0; + pThis->cbRec = 0; + return true; + } + return error(pThis->pszSrc, "Write error\n"); + } + return false; +} + +static bool omfWriter_RecEndWithCrc(POMFWRITER pThis) +{ + return omfWriter_RecEnd(pThis, true /*fAddCrc*/); +} + + +static bool omfWriter_BeginModule(POMFWRITER pThis, const char *pszFile) +{ + return omfWriter_RecBegin(pThis, OMF_THEADR) + && omfWriter_RecAddString(pThis, pszFile) + && omfWriter_RecEndWithCrc(pThis); +} + + +/** + * Simple stupid string hashing function (for LNAMES) + * @returns 8-bit hash. + * @param pchName The string. + * @param cchName The string length. + */ +DECLINLINE(uint8_t) omfWriter_HashStrU8(const char *pchName, size_t cchName) +{ + if (cchName) + return (uint8_t)(cchName + pchName[cchName >> 1]); + return 0; +} + +/** + * Looks up a LNAME. + * + * @returns Index (0..32K) if found, UINT16_MAX if not found. + * @param pThis The OMF writer. + * @param pchName The name to look up. + * @param cchName The length of the name. + */ +static uint16_t omfWriter_LNamesLookupN(POMFWRITER pThis, const char *pchName, size_t cchName) +{ + uint8_t uHash = omfWriter_HashStrU8(pchName, cchName); + uHash %= RT_ELEMENTS(pThis->apNameLookup); + + POMFWRLNAME pCur = pThis->apNameLookup[uHash]; + while (pCur) + { + if ( pCur->cchName == cchName + && memcmp(pCur->szName, pchName, cchName) == 0) + return pCur->idxName; + pCur = pCur->pNext; + } + + return UINT16_MAX; +} + +/** + * Add a LNAME lookup record. + * + * @returns success indicator. + * @param pThis The OMF writer. + * @param pchName The name to look up. + * @param cchName The length of the name. + * @param idxName The name index. + */ +static bool omfWriter_LNamesAddLookup(POMFWRITER pThis, const char *pchName, size_t cchName, uint16_t idxName) +{ + POMFWRLNAME pCur = (POMFWRLNAME)malloc(sizeof(*pCur) + cchName); + if (!pCur) + return error("???", "Out of memory!\n"); + + pCur->idxName = idxName; + pCur->cchName = (uint8_t)cchName; + memcpy(pCur->szName, pchName, cchName); + pCur->szName[cchName] = '\0'; + + uint8_t uHash = omfWriter_HashStrU8(pchName, cchName); + uHash %= RT_ELEMENTS(pThis->apNameLookup); + pCur->pNext = pThis->apNameLookup[uHash]; + pThis->apNameLookup[uHash] = pCur; + + return true; +} + + +static bool omfWriter_LNamesAddN(POMFWRITER pThis, const char *pchName, size_t cchName, uint16_t *pidxName) +{ + /* See if we've already got that name in the list. */ + uint16_t idxName; + if (pidxName) /* If pidxName is NULL, we assume the caller might just be passing stuff thru. */ + { + idxName = omfWriter_LNamesLookupN(pThis, pchName, cchName); + if (idxName != UINT16_MAX) + { + *pidxName = idxName; + return true; + } + } + + /* split? */ + if (pThis->cbRec + 1 /*len*/ + cchName + 1 /*crc*/ > OMF_MAX_RECORD_PAYLOAD) + { + if (pThis->cbRec == 0) + return error(pThis->pszSrc, "Too long LNAME '%*.*s'\n", (int)cchName, (int)cchName, pchName); + if ( !omfWriter_RecEndWithCrc(pThis) + || !omfWriter_RecBegin(pThis, OMF_LNAMES)) + return false; + } + + idxName = pThis->idxNextName++; + if (pidxName) + *pidxName = idxName; + return omfWriter_RecAddStringN(pThis, pchName, cchName) + && omfWriter_LNamesAddLookup(pThis, pchName, cchName, idxName); +} + +static bool omfWriter_LNamesAdd(POMFWRITER pThis, const char *pszName, uint16_t *pidxName) +{ + return omfWriter_LNamesAddN(pThis, pszName, strlen(pszName), pidxName); +} + +static bool omfWriter_LNamesBegin(POMFWRITER pThis, bool fAddZeroEntry) +{ + /* First entry is an empty string. */ + return omfWriter_RecBegin(pThis, OMF_LNAMES) + && ( pThis->idxNextName > 1 + || !fAddZeroEntry + || omfWriter_LNamesAddN(pThis, "", 0, NULL)); +} + +static bool omfWriter_LNamesEnd(POMFWRITER pThis) +{ + return omfWriter_RecEndWithCrc(pThis); +} + + +static bool omfWriter_SegDef(POMFWRITER pThis, uint8_t bSegAttr, uint32_t cbSeg, uint16_t idxSegName, uint16_t idxSegClass, + uint16_t idxOverlay = 1 /* NULL entry */) +{ + return omfWriter_RecBegin(pThis, OMF_SEGDEF32) + && omfWriter_RecAddU8(pThis, bSegAttr) + && omfWriter_RecAddU32(pThis, cbSeg) + && omfWriter_RecAddIdx(pThis, idxSegName) + && omfWriter_RecAddIdx(pThis, idxSegClass) + && omfWriter_RecAddIdx(pThis, idxOverlay) + && omfWriter_RecEndWithCrc(pThis); +} + +static bool omfWriter_SegDef16(POMFWRITER pThis, uint8_t bSegAttr, uint32_t cbSeg, uint16_t idxSegName, uint16_t idxSegClass, + uint16_t idxOverlay = 1 /* NULL entry */) +{ + Assert(cbSeg <= UINT16_MAX); + return omfWriter_RecBegin(pThis, OMF_SEGDEF16) + && omfWriter_RecAddU8(pThis, bSegAttr) + && omfWriter_RecAddU16(pThis, cbSeg) + && omfWriter_RecAddIdx(pThis, idxSegName) + && omfWriter_RecAddIdx(pThis, idxSegClass) + && omfWriter_RecAddIdx(pThis, idxOverlay) + && omfWriter_RecEndWithCrc(pThis); +} + +static bool omfWriter_GrpDefBegin(POMFWRITER pThis, uint16_t idxGrpName) +{ + return omfWriter_RecBegin(pThis, OMF_GRPDEF) + && omfWriter_RecAddIdx(pThis, idxGrpName); +} + +static bool omfWriter_GrpDefAddSegDef(POMFWRITER pThis, uint16_t idxSegDef) +{ + return omfWriter_RecAddU8(pThis, 0xff) + && omfWriter_RecAddIdx(pThis, idxSegDef); +} + +static bool omfWriter_GrpDefEnd(POMFWRITER pThis) +{ + return omfWriter_RecEndWithCrc(pThis); +} + + +static bool omfWriter_PubDefBegin(POMFWRITER pThis, uint16_t idxGrpDef, uint16_t idxSegDef) +{ + return omfWriter_RecBegin(pThis, OMF_PUBDEF32) + && omfWriter_RecAddIdx(pThis, idxGrpDef) + && omfWriter_RecAddIdx(pThis, idxSegDef) + && ( idxSegDef != 0 + || omfWriter_RecAddU16(pThis, 0)); + +} + +static bool omfWriter_PubDefAddN(POMFWRITER pThis, uint32_t uValue, const char *pchString, size_t cchString, + bool fPrependUnderscore) +{ + /* Split? */ + if (pThis->cbRec + 1 + cchString + 4 + 1 + 1 + fPrependUnderscore > OMF_MAX_RECORD_PAYLOAD) + { + if (cchString >= 256) + return error(pThis->pszSrc, "PUBDEF string too long %u ('%s')\n", + (unsigned)cchString, (int)cchString, (int)cchString, pchString); + if (!omfWriter_RecEndWithCrc(pThis)) + return false; + + /* Figure out the initial data length. */ + pThis->cbRec = 1 + ((pThis->abData[0] & 0x80) != 0); + if (pThis->abData[pThis->cbRec] != 0) + pThis->cbRec += 1 + ((pThis->abData[pThis->cbRec] & 0x80) != 0); + else + pThis->cbRec += 3; + pThis->bType = OMF_PUBDEF32; + } + + return omfWriter_RecAddStringNEx(pThis, pchString, cchString, fPrependUnderscore) + && omfWriter_RecAddU32(pThis, uValue) + && omfWriter_RecAddIdx(pThis, 0); /* type */ +} + +static bool omfWriter_PubDefAdd(POMFWRITER pThis, uint32_t uValue, const char *pszString, bool fPrependUnderscore) +{ + return omfWriter_PubDefAddN(pThis, uValue, pszString, strlen(pszString), fPrependUnderscore); +} + +static bool omfWriter_PubDefEnd(POMFWRITER pThis) +{ + return omfWriter_RecEndWithCrc(pThis); +} + +/** + * EXTDEF - Begin record. + */ +static bool omfWriter_ExtDefBegin(POMFWRITER pThis) +{ + return omfWriter_RecBegin(pThis, OMF_EXTDEF); + +} + +/** + * EXTDEF - Add an entry, split record if necessary. + */ +static bool omfWriter_ExtDefAddN(POMFWRITER pThis, const char *pchString, size_t cchString, uint16_t idxType, + bool fPrependUnderscore) +{ + /* Split? */ + if (pThis->cbRec + 1 + cchString + 1 + 1 + fPrependUnderscore > OMF_MAX_RECORD_PAYLOAD) + { + if (cchString >= 256) + return error(pThis->pszSrc, "EXTDEF string too long %u ('%s')\n", + (unsigned)cchString, (int)cchString, (int)cchString, pchString); + if ( !omfWriter_RecEndWithCrc(pThis) + || !omfWriter_RecBegin(pThis, OMF_EXTDEF)) + return false; + } + + return omfWriter_RecAddStringNEx(pThis, pchString, cchString, fPrependUnderscore) + && omfWriter_RecAddIdx(pThis, idxType); /* type */ +} + +/** + * EXTDEF - Add an entry, split record if necessary. + */ +static bool omfWriter_ExtDefAdd(POMFWRITER pThis, const char *pszString, bool fPrependUnderscore) +{ + return omfWriter_ExtDefAddN(pThis, pszString, strlen(pszString), 0, fPrependUnderscore); +} + +/** + * EXTDEF - End of record. + */ +static bool omfWriter_ExtDefEnd(POMFWRITER pThis) +{ + return omfWriter_RecEndWithCrc(pThis); +} + +/** + * COMENT/LINK_PASS_SEP - Add a link pass separator comment. + */ +static bool omfWriter_LinkPassSeparator(POMFWRITER pThis) +{ + return omfWriter_RecBegin(pThis, OMF_COMENT) + && omfWriter_RecAddU8(pThis, OMF_CTYP_NO_LIST) + && omfWriter_RecAddU8(pThis, OMF_CCLS_LINK_PASS_SEP) + && omfWriter_RecAddU8(pThis, 1) + && omfWriter_RecEndWithCrc(pThis); +} + + +/** + * LEDATA + FIXUPP - Begin records. + */ +static bool omfWriter_LEDataBegin(POMFWRITER pThis, uint16_t idxSeg, uint32_t offSeg) +{ + if ( omfWriter_RecBegin(pThis, OMF_LEDATA32) + && omfWriter_RecAddIdx(pThis, idxSeg) + && omfWriter_RecAddU32(pThis, offSeg)) + { + pThis->idx = idxSeg; + pThis->offSeg = offSeg; + pThis->offSegRec = offSeg; + pThis->offSegEnd = offSeg + OMF_MAX_RECORD_PAYLOAD - 1 /*CRC*/ - pThis->cbRec; + pThis->offSegEnd &= ~(uint32_t)7; /* qword align. */ + + /* Reset the associated FIXUPP records. */ + pThis->iFixupp = 0; + for (unsigned i = 0; i < RT_ELEMENTS(pThis->aFixupps); i++) + pThis->aFixupps[i].cbRec = 0; + return true; + } + return false; +} + +/** + * LEDATA + FIXUPP - Begin records. + */ +static bool omfWriter_LEDataBeginEx(POMFWRITER pThis, uint16_t idxSeg, uint32_t offSeg, + uint32_t cbData, uint32_t cbRawData, void const *pbRawData, uint8_t **ppbData) +{ + if ( omfWriter_RecBegin(pThis, OMF_LEDATA32) + && omfWriter_RecAddIdx(pThis, idxSeg) + && omfWriter_RecAddU32(pThis, offSeg)) + { + if ( cbData <= _1K + && pThis->cbRec + cbData + 1 <= OMF_MAX_RECORD_PAYLOAD) + { + uint8_t *pbDst = &pThis->abData[pThis->cbRec]; + if (ppbData) + *ppbData = pbDst; + + if (cbRawData) + memcpy(pbDst, pbRawData, RT_MIN(cbData, cbRawData)); + if (cbData > cbRawData) + memset(&pbDst[cbRawData], 0, cbData - cbRawData); + + pThis->cbRec += cbData; + pThis->idx = idxSeg; + pThis->offSegRec = offSeg; + pThis->offSeg = offSeg + cbData; + pThis->offSegEnd = offSeg + cbData; + + /* Reset the associated FIXUPP records. */ + pThis->iFixupp = 0; + for (unsigned i = 0; i < RT_ELEMENTS(pThis->aFixupps); i++) + pThis->aFixupps[i].cbRec = 0; + return true; + } + error(pThis->pszSrc, "Too much data for LEDATA record! (%#x)\n", (unsigned)cbData); + } + return false; +} + +/** + * LEDATA + FIXUPP - Add FIXUPP subrecord bytes, split if necessary. + */ +static bool omfWriter_LEDataAddFixuppBytes(POMFWRITER pThis, void *pvSubRec, size_t cbSubRec) +{ + /* Split? */ + unsigned iFixupp = pThis->iFixupp; + if (pThis->aFixupps[iFixupp].cbRec + cbSubRec >= OMF_MAX_RECORD_PAYLOAD) + { + if (g_cVerbose >= 2) + printf("debug: FIXUPP split\n"); + iFixupp++; + if (iFixupp >= RT_ELEMENTS(pThis->aFixupps)) + return error(pThis->pszSrc, "Out of FIXUPP records\n"); + pThis->iFixupp = iFixupp; + pThis->aFixupps[iFixupp].cbRec = 0; /* paranoia */ + } + + /* Append the sub-record data. */ + memcpy(&pThis->aFixupps[iFixupp].abData[pThis->aFixupps[iFixupp].cbRec], pvSubRec, cbSubRec); + pThis->aFixupps[iFixupp].cbRec += (uint16_t)cbSubRec; + return true; +} + +/** + * LEDATA + FIXUPP - Add fixup, split if necessary. + */ +static bool omfWriter_LEDataAddFixup(POMFWRITER pThis, uint16_t offDataRec, bool fSelfRel, uint8_t bLocation, + uint8_t bFrame, uint16_t idxFrame, + uint8_t bTarget, uint16_t idxTarget, bool fTargetDisp, uint32_t offTargetDisp) +{ + if (g_cVerbose >= 2) + printf("debug: FIXUP[%#x]: off=%#x frame=%u:%#x target=%u:%#x disp=%d:%#x\n", pThis->aFixupps[pThis->iFixupp].cbRec, + offDataRec, bFrame, idxFrame, bTarget, idxTarget, fTargetDisp, offTargetDisp); + + if ( offDataRec >= _1K + || bFrame >= 6 + || bTarget > 6 + || idxFrame >= _32K + || idxTarget >= _32K + || fTargetDisp != (bTarget <= OMF_FIX_T_FRAME_NO) ) + return error(pThis->pszSrc, + "Internal error: offDataRec=%#x bFrame=%u idxFrame=%#x bTarget=%u idxTarget=%#x fTargetDisp=%d offTargetDisp=%#x\n", + offDataRec, bFrame, idxFrame, bTarget, idxTarget, fTargetDisp, offTargetDisp); + + + /* + * Encode the FIXUP subrecord. + */ + uint8_t abFixup[16]; + uint8_t off = 0; + /* Location */ + abFixup[off++] = (offDataRec >> 8) | (bLocation << 2) | ((uint8_t)!fSelfRel << 6) | 0x80; + abFixup[off++] = (uint8_t)offDataRec; + /* Fix Data */ + abFixup[off++] = 0x00 /*F=0*/ | (bFrame << 4) | 0x00 /*T=0*/ | bTarget; + /* Frame Datum */ + if (bFrame <= OMF_FIX_F_FRAME_NO) + { + if (idxFrame >= 128) + abFixup[off++] = (uint8_t)(idxFrame >> 8) | 0x80; + abFixup[off++] = (uint8_t)idxFrame; + } + /* Target Datum */ + if (idxTarget >= 128) + abFixup[off++] = (uint8_t)(idxTarget >> 8) | 0x80; + abFixup[off++] = (uint8_t)idxTarget; + /* Target Displacement */ + if (fTargetDisp) + { + abFixup[off++] = RT_BYTE1(offTargetDisp); + abFixup[off++] = RT_BYTE2(offTargetDisp); + abFixup[off++] = RT_BYTE3(offTargetDisp); + abFixup[off++] = RT_BYTE4(offTargetDisp); + } + + return omfWriter_LEDataAddFixuppBytes(pThis, abFixup, off); +} + +/** + * LEDATA + FIXUPP - Add simple fixup, split if necessary. + */ +static bool omfWriter_LEDataAddFixupNoDisp(POMFWRITER pThis, uint16_t offDataRec, uint8_t bLocation, + uint8_t bFrame, uint16_t idxFrame, uint8_t bTarget, uint16_t idxTarget) +{ + return omfWriter_LEDataAddFixup(pThis, offDataRec, false /*fSelfRel*/, bLocation, bFrame, idxFrame, bTarget, idxTarget, + false /*fTargetDisp*/, 0 /*offTargetDisp*/); +} + + +/** + * LEDATA + FIXUPP - End of records. + */ +static bool omfWriter_LEDataEnd(POMFWRITER pThis) +{ + if (omfWriter_RecEndWithCrc(pThis)) + { + for (unsigned iFixupp = 0; iFixupp <= pThis->iFixupp; iFixupp++) + { + uint16_t const cbRec = pThis->aFixupps[iFixupp].cbRec; + if (!cbRec) + break; + if (g_cVerbose >= 3) + printf("debug: FIXUPP32 #%u cbRec=%#x\n", iFixupp, cbRec); + if ( !omfWriter_RecBegin(pThis, OMF_FIXUPP32) + || !omfWriter_RecAddBytes(pThis, pThis->aFixupps[iFixupp].abData, cbRec) + || !omfWriter_RecEndWithCrc(pThis)) + return false; + } + pThis->iFixupp = 0; + return true; + } + return false; +} + +/** + * LEDATA + FIXUPP - Splits the LEDATA record. + */ +static bool omfWriter_LEDataSplit(POMFWRITER pThis) +{ + return omfWriter_LEDataEnd(pThis) + && omfWriter_LEDataBegin(pThis, pThis->idx, pThis->offSeg); +} + +/** + * LEDATA + FIXUPP - Returns available space in current LEDATA record. + */ +static uint32_t omfWriter_LEDataAvailable(POMFWRITER pThis) +{ + if (pThis->offSeg < pThis->offSegEnd) + return pThis->offSegEnd - pThis->offSeg; + return 0; +} + +/** + * LEDATA + FIXUPP - Splits LEDATA record if less than @a cb bytes available. + */ +static bool omfWriter_LEDataEnsureSpace(POMFWRITER pThis, uint32_t cb) +{ + if ( omfWriter_LEDataAvailable(pThis) >= cb + || omfWriter_LEDataSplit(pThis)) + return true; + return false; +} + +/** + * LEDATA + FIXUPP - Adds data to the LEDATA record, splitting it if needed. + */ +static bool omfWriter_LEDataAddBytes(POMFWRITER pThis, void const *pvData, size_t cbData) +{ + while (cbData > 0) + { + uint32_t cbAvail = omfWriter_LEDataAvailable(pThis); + if (cbAvail >= cbData) + { + if (omfWriter_RecAddBytes(pThis, pvData, cbData)) + { + pThis->offSeg += (uint32_t)cbData; + break; + } + return false; + } + if (!omfWriter_RecAddBytes(pThis, pvData, cbAvail)) + return false; + pThis->offSeg += cbAvail; + pvData = (uint8_t const *)pvData + cbAvail; + cbData -= cbAvail; + if (!omfWriter_LEDataSplit(pThis)) + return false; + } + return true; +} + +/** + * LEDATA + FIXUPP - Adds a U32 to the LEDATA record, splitting if needed. + */ +static bool omfWriter_LEDataAddU32(POMFWRITER pThis, uint32_t u32) +{ + if ( omfWriter_LEDataEnsureSpace(pThis, 4) + && omfWriter_RecAddU32(pThis, u32)) + { + pThis->offSeg += 4; + return true; + } + return false; +} + +/** + * LEDATA + FIXUPP - Adds a U16 to the LEDATA record, splitting if needed. + */ +static bool omfWriter_LEDataAddU16(POMFWRITER pThis, uint16_t u16) +{ + if ( omfWriter_LEDataEnsureSpace(pThis, 2) + && omfWriter_RecAddU16(pThis, u16)) + { + pThis->offSeg += 2; + return true; + } + return false; +} + +#if 0 /* unused */ +/** + * LEDATA + FIXUPP - Adds a byte to the LEDATA record, splitting if needed. + */ +static bool omfWriter_LEDataAddU8(POMFWRITER pThis, uint8_t b) +{ + if ( omfWriter_LEDataEnsureSpace(pThis, 1) + && omfWriter_RecAddU8(pThis, b)) + { + pThis->offSeg += 1; + return true; + } + return false; +} +#endif + +/** + * MODEND - End of module, simple variant. + */ +static bool omfWriter_EndModule(POMFWRITER pThis) +{ + return omfWriter_RecBegin(pThis, OMF_MODEND32) + && omfWriter_RecAddU8(pThis, 0) + && omfWriter_RecEndWithCrc(pThis); +} + + + + +/********************************************************************************************************************************* +* ELF64/AMD64 -> ELF64/i386 Converter * +*********************************************************************************************************************************/ + +/** AMD64 relocation type names for ELF. */ +static const char * const g_apszElfAmd64RelTypes[] = +{ + "R_X86_64_NONE", + "R_X86_64_64", + "R_X86_64_PC32", + "R_X86_64_GOT32", + "R_X86_64_PLT32", + "R_X86_64_COPY", + "R_X86_64_GLOB_DAT", + "R_X86_64_JMP_SLOT", + "R_X86_64_RELATIVE", + "R_X86_64_GOTPCREL", + "R_X86_64_32", + "R_X86_64_32S", + "R_X86_64_16", + "R_X86_64_PC16", + "R_X86_64_8", + "R_X86_64_PC8", + "R_X86_64_DTPMOD64", + "R_X86_64_DTPOFF64", + "R_X86_64_TPOFF64", + "R_X86_64_TLSGD", + "R_X86_64_TLSLD", + "R_X86_64_DTPOFF32", + "R_X86_64_GOTTPOFF", + "R_X86_64_TPOFF32", +}; + +/** AMD64 relocation type sizes for ELF. */ +static uint8_t const g_acbElfAmd64RelTypes[] = +{ + 0, /* R_X86_64_NONE */ + 8, /* R_X86_64_64 */ + 4, /* R_X86_64_PC32 */ + 4, /* R_X86_64_GOT32 */ + 4, /* R_X86_64_PLT32 */ + 0, /* R_X86_64_COPY */ + 0, /* R_X86_64_GLOB_DAT */ + 0, /* R_X86_64_JMP_SLOT */ + 0, /* R_X86_64_RELATIVE */ + 0, /* R_X86_64_GOTPCREL */ + 4, /* R_X86_64_32 */ + 4, /* R_X86_64_32S */ + 2, /* R_X86_64_16 */ + 2, /* R_X86_64_PC16 */ + 1, /* R_X86_64_8 */ + 1, /* R_X86_64_PC8 */ + 0, /* R_X86_64_DTPMOD64 */ + 0, /* R_X86_64_DTPOFF64 */ + 0, /* R_X86_64_TPOFF64 */ + 0, /* R_X86_64_TLSGD */ + 0, /* R_X86_64_TLSLD */ + 0, /* R_X86_64_DTPOFF32 */ + 0, /* R_X86_64_GOTTPOFF */ + 0, /* R_X86_64_TPOFF32 */ +}; + +/** Macro for getting the size of a AMD64 ELF relocation. */ +#define ELF_AMD64_RELOC_SIZE(a_Type) ( (a_Type) < RT_ELEMENTS(g_acbElfAmd64RelTypes) ? g_acbElfAmd64RelTypes[(a_Type)] : 1) + + +typedef struct ELFDETAILS +{ + /** The ELF header. */ + Elf64_Ehdr const *pEhdr; + /** The section header table. */ + Elf64_Shdr const *paShdrs; + /** The string table for the section names. */ + const char *pchShStrTab; + + /** The symbol table section number. UINT16_MAX if not found. */ + uint16_t iSymSh; + /** The string table section number. UINT16_MAX if not found. */ + uint16_t iStrSh; + + /** The symbol table. */ + Elf64_Sym const *paSymbols; + /** The number of symbols in the symbol table. */ + uint32_t cSymbols; + + /** Pointer to the (symbol) string table if found. */ + const char *pchStrTab; + /** The string table size. */ + size_t cbStrTab; + +} ELFDETAILS; +typedef ELFDETAILS *PELFDETAILS; +typedef ELFDETAILS const *PCELFDETAILS; + + +static bool validateElf(const char *pszFile, uint8_t const *pbFile, size_t cbFile, PELFDETAILS pElfStuff) +{ + /* + * Initialize the ELF details structure. + */ + memset(pElfStuff, 0, sizeof(*pElfStuff)); + pElfStuff->iSymSh = UINT16_MAX; + pElfStuff->iStrSh = UINT16_MAX; + + /* + * Validate the header and our other expectations. + */ + Elf64_Ehdr const *pEhdr = (Elf64_Ehdr const *)pbFile; + pElfStuff->pEhdr = pEhdr; + if ( pEhdr->e_ident[EI_CLASS] != ELFCLASS64 + || pEhdr->e_ident[EI_DATA] != ELFDATA2LSB + || pEhdr->e_ehsize != sizeof(Elf64_Ehdr) + || pEhdr->e_shentsize != sizeof(Elf64_Shdr) + || pEhdr->e_version != EV_CURRENT ) + return error(pszFile, "Unsupported ELF config\n"); + if (pEhdr->e_type != ET_REL) + return error(pszFile, "Expected relocatable ELF file (e_type=%d)\n", pEhdr->e_type); + if (pEhdr->e_machine != EM_X86_64) + return error(pszFile, "Expected relocatable ELF file (e_type=%d)\n", pEhdr->e_machine); + if (pEhdr->e_phnum != 0) + return error(pszFile, "Expected e_phnum to be zero not %u\n", pEhdr->e_phnum); + if (pEhdr->e_shnum < 2) + return error(pszFile, "Expected e_shnum to be two or higher\n"); + if (pEhdr->e_shstrndx >= pEhdr->e_shnum || pEhdr->e_shstrndx == 0) + return error(pszFile, "Bad e_shstrndx=%u (e_shnum=%u)\n", pEhdr->e_shstrndx, pEhdr->e_shnum); + if ( pEhdr->e_shoff >= cbFile + || pEhdr->e_shoff + pEhdr->e_shnum * sizeof(Elf64_Shdr) > cbFile) + return error(pszFile, "Section table is outside the file (e_shoff=%#llx, e_shnum=%u, cbFile=%#llx)\n", + pEhdr->e_shstrndx, pEhdr->e_shnum, (uint64_t)cbFile); + + /* + * Locate the section name string table. + * We assume it's okay as we only reference it in verbose mode. + */ + Elf64_Shdr const *paShdrs = (Elf64_Shdr const *)&pbFile[pEhdr->e_shoff]; + pElfStuff->paShdrs = paShdrs; + + Elf64_Xword const cbShStrTab = paShdrs[pEhdr->e_shstrndx].sh_size; + if ( paShdrs[pEhdr->e_shstrndx].sh_offset > cbFile + || cbShStrTab > cbFile + || paShdrs[pEhdr->e_shstrndx].sh_offset + cbShStrTab > cbFile) + return error(pszFile, + "Section string table is outside the file (sh_offset=%#" ELF_FMT_X64 " sh_size=%#" ELF_FMT_X64 " cbFile=%#" ELF_FMT_X64 ")\n", + paShdrs[pEhdr->e_shstrndx].sh_offset, paShdrs[pEhdr->e_shstrndx].sh_size, (Elf64_Xword)cbFile); + const char *pchShStrTab = (const char *)&pbFile[paShdrs[pEhdr->e_shstrndx].sh_offset]; + pElfStuff->pchShStrTab = pchShStrTab; + + /* + * Work the section table. + */ + bool fRet = true; + for (uint32_t i = 1; i < pEhdr->e_shnum; i++) + { + if (paShdrs[i].sh_name >= cbShStrTab) + return error(pszFile, "Invalid sh_name value (%#x) for section #%u\n", paShdrs[i].sh_name, i); + const char *pszShNm = &pchShStrTab[paShdrs[i].sh_name]; + + if ( paShdrs[i].sh_offset > cbFile + || paShdrs[i].sh_size > cbFile + || paShdrs[i].sh_offset + paShdrs[i].sh_size > cbFile) + return error(pszFile, "Section #%u '%s' has data outside the file: %#" ELF_FMT_X64 " LB %#" ELF_FMT_X64 " (cbFile=%#" ELF_FMT_X64 ")\n", + i, pszShNm, paShdrs[i].sh_offset, paShdrs[i].sh_size, (Elf64_Xword)cbFile); + if (g_cVerbose) + printf("shdr[%u]: name=%#x '%s' type=%#x flags=%#" ELF_FMT_X64 " addr=%#" ELF_FMT_X64 " off=%#" ELF_FMT_X64 " size=%#" ELF_FMT_X64 "\n" + " link=%u info=%#x align=%#" ELF_FMT_X64 " entsize=%#" ELF_FMT_X64 "\n", + i, paShdrs[i].sh_name, pszShNm, paShdrs[i].sh_type, paShdrs[i].sh_flags, + paShdrs[i].sh_addr, paShdrs[i].sh_offset, paShdrs[i].sh_size, + paShdrs[i].sh_link, paShdrs[i].sh_info, paShdrs[i].sh_addralign, paShdrs[i].sh_entsize); + + if (paShdrs[i].sh_link >= pEhdr->e_shnum) + return error(pszFile, "Section #%u '%s' links to a section outside the section table: %#x, max %#x\n", + i, pszShNm, paShdrs[i].sh_link, pEhdr->e_shnum); + if (!RT_IS_POWER_OF_TWO(paShdrs[i].sh_addralign)) + return error(pszFile, "Section #%u '%s' alignment value is not a power of two: %#" ELF_FMT_X64 "\n", + i, pszShNm, paShdrs[i].sh_addralign); + if (!RT_IS_POWER_OF_TWO(paShdrs[i].sh_addralign)) + return error(pszFile, "Section #%u '%s' alignment value is not a power of two: %#" ELF_FMT_X64 "\n", + i, pszShNm, paShdrs[i].sh_addralign); + if (paShdrs[i].sh_addr != 0) + return error(pszFile, "Section #%u '%s' has non-zero address: %#" ELF_FMT_X64 "\n", i, pszShNm, paShdrs[i].sh_addr); + + if (paShdrs[i].sh_type == SHT_RELA) + { + if (paShdrs[i].sh_entsize != sizeof(Elf64_Rela)) + return error(pszFile, "Expected sh_entsize to be %u not %u for section #%u (%s)\n", (unsigned)sizeof(Elf64_Rela), + paShdrs[i].sh_entsize, i, pszShNm); + uint32_t const cRelocs = paShdrs[i].sh_size / sizeof(Elf64_Rela); + if (cRelocs * sizeof(Elf64_Rela) != paShdrs[i].sh_size) + return error(pszFile, "Uneven relocation entry count in #%u (%s): sh_size=%#" ELF_FMT_X64 "\n", + i, pszShNm, paShdrs[i].sh_size); + if ( paShdrs[i].sh_offset > cbFile + || paShdrs[i].sh_size >= cbFile + || paShdrs[i].sh_offset + paShdrs[i].sh_size > cbFile) + return error(pszFile, "The content of section #%u '%s' is outside the file (%#" ELF_FMT_X64 " LB %#" ELF_FMT_X64 ", cbFile=%#lx)\n", + i, pszShNm, paShdrs[i].sh_offset, paShdrs[i].sh_size, (unsigned long)cbFile); + if (paShdrs[i].sh_info != i - 1) + return error(pszFile, "Expected relocation section #%u (%s) to link to previous section: sh_info=%#u\n", + i, pszShNm, (unsigned)paShdrs[i].sh_link); + if (paShdrs[paShdrs[i].sh_link].sh_type != SHT_SYMTAB) + return error(pszFile, "Expected relocation section #%u (%s) to link to symbol table: sh_link=%#u -> sh_type=%#x\n", + i, pszShNm, (unsigned)paShdrs[i].sh_link, (unsigned)paShdrs[paShdrs[i].sh_link].sh_type); + uint32_t cSymbols = paShdrs[paShdrs[i].sh_link].sh_size / paShdrs[paShdrs[i].sh_link].sh_entsize; + + Elf64_Rela const *paRelocs = (Elf64_Rela *)&pbFile[paShdrs[i].sh_offset]; + for (uint32_t j = 0; j < cRelocs; j++) + { + uint8_t const bType = ELF64_R_TYPE(paRelocs[j].r_info); + if (RT_UNLIKELY(bType >= R_X86_64_COUNT)) + fRet = error(pszFile, + "%#018" ELF_FMT_X64 " %#018" ELF_FMT_X64 ": unknown fix up %#x (%+" ELF_FMT_D64 ")\n", + paRelocs[j].r_offset, paRelocs[j].r_info, bType, paRelocs[j].r_addend); + if (RT_UNLIKELY( paRelocs[j].r_offset > paShdrs[i - 1].sh_size + || paRelocs[j].r_offset + ELF_AMD64_RELOC_SIZE(ELF64_R_TYPE(paRelocs[j].r_info)) + > paShdrs[i - 1].sh_size)) + fRet = error(pszFile, + "%#018" ELF_FMT_X64 " %#018" ELF_FMT_X64 ": out of bounds (sh_size %" ELF_FMT_X64 ")\n", + paRelocs[j].r_offset, paRelocs[j].r_info, paShdrs[i - 1].sh_size); + + uint32_t const iSymbol = ELF64_R_SYM(paRelocs[j].r_info); + if (RT_UNLIKELY(iSymbol >= cSymbols)) + fRet = error(pszFile, + "%#018" ELF_FMT_X64 " %#018" ELF_FMT_X64 ": symbol index (%#x) out of bounds (%#x)\n", + paRelocs[j].r_offset, paRelocs[j].r_info, iSymbol, cSymbols); + } + } + else if (paShdrs[i].sh_type == SHT_REL) + fRet = error(pszFile, "Section #%u '%s': Unexpected SHT_REL section\n", i, pszShNm); + else if (paShdrs[i].sh_type == SHT_SYMTAB) + { + if (paShdrs[i].sh_entsize != sizeof(Elf64_Sym)) + fRet = error(pszFile, "Section #%u '%s': Unsupported symbol table entry size in : #%u (expected #%u)\n", + i, pszShNm, paShdrs[i].sh_entsize, sizeof(Elf64_Sym)); + Elf64_Xword const cSymbols = paShdrs[i].sh_size / paShdrs[i].sh_entsize; + if (cSymbols * paShdrs[i].sh_entsize != paShdrs[i].sh_size) + fRet = error(pszFile, "Section #%u '%s': Size not a multiple of entry size: %#" ELF_FMT_X64 " %% %#" ELF_FMT_X64 " = %#" ELF_FMT_X64 "\n", + i, pszShNm, paShdrs[i].sh_size, paShdrs[i].sh_entsize, paShdrs[i].sh_size % paShdrs[i].sh_entsize); + if (cSymbols > UINT32_MAX) + fRet = error(pszFile, "Section #%u '%s': too many symbols: %" ELF_FMT_X64 "\n", + i, pszShNm, paShdrs[i].sh_size, cSymbols); + + if (pElfStuff->iSymSh == UINT16_MAX) + { + pElfStuff->iSymSh = (uint16_t)i; + pElfStuff->paSymbols = (Elf64_Sym const *)&pbFile[paShdrs[i].sh_offset]; + pElfStuff->cSymbols = cSymbols; + + if (paShdrs[i].sh_link != 0) + { + /* Note! The symbol string table section header may not have been validated yet! */ + Elf64_Shdr const *pStrTabShdr = &paShdrs[paShdrs[i].sh_link]; + pElfStuff->iStrSh = paShdrs[i].sh_link; + pElfStuff->pchStrTab = (const char *)&pbFile[pStrTabShdr->sh_offset]; + pElfStuff->cbStrTab = (size_t)pStrTabShdr->sh_size; + } + else + fRet = error(pszFile, "Section #%u '%s': String table link is out of bounds (%#x)\n", + i, pszShNm, paShdrs[i].sh_link); + } + else + fRet = error(pszFile, "Section #%u '%s': Found additonal symbol table, previous in #%u\n", + i, pszShNm, pElfStuff->iSymSh); + } + } + return fRet; +} + + +static bool convertElfSectionsToSegDefsAndGrpDefs(POMFWRITER pThis, PCELFDETAILS pElfStuff) +{ + /* + * Do the list of names pass. + */ + uint16_t idxGrpFlat, idxGrpData; + uint16_t idxClassCode, idxClassData, idxClassDwarf; + if ( !omfWriter_LNamesBegin(pThis, true /*fAddZeroEntry*/) + || !omfWriter_LNamesAddN(pThis, RT_STR_TUPLE("FLAT"), &idxGrpFlat) + || !omfWriter_LNamesAddN(pThis, RT_STR_TUPLE("BS3DATA64_GROUP"), &idxGrpData) + || !omfWriter_LNamesAddN(pThis, RT_STR_TUPLE("BS3CLASS64CODE"), &idxClassCode) + || !omfWriter_LNamesAddN(pThis, RT_STR_TUPLE("FAR_DATA"), &idxClassData) + || !omfWriter_LNamesAddN(pThis, RT_STR_TUPLE("DWARF"), &idxClassDwarf) + ) + return false; + + bool fHaveData = false; + Elf64_Shdr const *pShdr = &pElfStuff->paShdrs[1]; + Elf64_Half const cSections = pElfStuff->pEhdr->e_shnum; + for (Elf64_Half i = 1; i < cSections; i++, pShdr++) + { + const char *pszName = &pElfStuff->pchShStrTab[pShdr->sh_name]; + if (*pszName == '\0') + return error(pThis->pszSrc, "Section #%u has an empty name!\n", i); + + switch (pShdr->sh_type) + { + case SHT_PROGBITS: + case SHT_NOBITS: + /* We drop a few sections we don't want:. */ + if ( strcmp(pszName, ".comment") != 0 /* compiler info */ + && strcmp(pszName, ".note.GNU-stack") != 0 /* some empty section for hinting the linker/whatever */ + && strcmp(pszName, ".eh_frame") != 0 /* unwind / exception info */ + ) + { + pThis->paSegments[i].iSegDef = UINT16_MAX; + pThis->paSegments[i].iGrpDef = UINT16_MAX; + + /* Translate the name and determine group and class. + Note! We currently strip sub-sections. */ + if ( strcmp(pszName, ".text") == 0 + || strncmp(pszName, RT_STR_TUPLE(".text.")) == 0) + { + pszName = "BS3TEXT64"; + pThis->paSegments[i].iGrpNm = idxGrpFlat; + pThis->paSegments[i].iClassNm = idxClassCode; + } + else if ( strcmp(pszName, ".data") == 0 + || strncmp(pszName, RT_STR_TUPLE(".data.")) == 0) + { + pszName = "BS3DATA64"; + pThis->paSegments[i].iGrpNm = idxGrpData; + pThis->paSegments[i].iClassNm = idxClassData; + } + else if (strcmp(pszName, ".bss") == 0) + { + pszName = "BS3BSS64"; + pThis->paSegments[i].iGrpNm = idxGrpData; + pThis->paSegments[i].iClassNm = idxClassData; + } + else if ( strcmp(pszName, ".rodata") == 0 + || strncmp(pszName, RT_STR_TUPLE(".rodata.")) == 0) + { + pszName = "BS3DATA64CONST"; + pThis->paSegments[i].iGrpNm = idxGrpData; + pThis->paSegments[i].iClassNm = idxClassData; + } + else if (strncmp(pszName, RT_STR_TUPLE(".debug_")) == 0) + { + pThis->paSegments[i].iGrpNm = UINT16_MAX; + pThis->paSegments[i].iClassNm = idxClassDwarf; + } + else + { + pThis->paSegments[i].iGrpNm = idxGrpData; + pThis->paSegments[i].iClassNm = idxClassData; + error(pThis->pszSrc, "Unknown data (?) segment: '%s'\n", pszName); + } + + /* Save the name. */ + pThis->paSegments[i].pszName = strdup(pszName); + if (!pThis->paSegments[i].pszName) + return error(pThis->pszSrc, "Out of memory!\n"); + + /* Add the section name. */ + if (!omfWriter_LNamesAdd(pThis, pThis->paSegments[i].pszName, &pThis->paSegments[i].iSegNm)) + return false; + + fHaveData |= pThis->paSegments[i].iGrpNm == idxGrpData; + break; + } + RT_FALL_THRU(); + + default: + pThis->paSegments[i].iSegDef = UINT16_MAX; + pThis->paSegments[i].iGrpDef = UINT16_MAX; + pThis->paSegments[i].iSegNm = UINT16_MAX; + pThis->paSegments[i].iGrpNm = UINT16_MAX; + pThis->paSegments[i].iClassNm = UINT16_MAX; + pThis->paSegments[i].pszName = NULL; + break; + } + } + + if (!omfWriter_LNamesEnd(pThis)) + return false; + + /* + * Emit segment definitions. + */ + uint16_t iSegDef = 1; /* Start counting at 1. */ + pShdr = &pElfStuff->paShdrs[1]; + for (Elf64_Half i = 1; i < cSections; i++, pShdr++) + { + if (pThis->paSegments[i].iSegNm == UINT16_MAX) + continue; + + uint8_t bSegAttr = 0; + + /* The A field. */ + switch (pShdr->sh_addralign) + { + case 0: + case 1: + bSegAttr |= 1 << 5; + break; + case 2: + bSegAttr |= 2 << 5; + break; + case 4: + bSegAttr |= 5 << 5; + break; + case 8: + case 16: + bSegAttr |= 3 << 5; + break; + case 32: + case 64: + case 128: + case 256: + bSegAttr |= 4 << 5; + break; + default: + bSegAttr |= 6 << 5; /* page aligned, pharlabs extension. */ + break; + } + + /* The C field. */ + bSegAttr |= 2 << 2; /* public */ + + /* The B field. We don't have 4GB segments, so leave it as zero. */ + + /* The D field shall be set as we're doing USE32. */ + bSegAttr |= 1; + + + /* Done. */ + if (!omfWriter_SegDef(pThis, bSegAttr, (uint32_t)pShdr->sh_size, + pThis->paSegments[i].iSegNm, + pThis->paSegments[i].iClassNm)) + return false; + pThis->paSegments[i].iSegDef = iSegDef++; + } + + /* + * Flat group definition (#1) - special, no members. + */ + uint16_t iGrpDef = 1; + if ( !omfWriter_GrpDefBegin(pThis, idxGrpFlat) + || !omfWriter_GrpDefEnd(pThis)) + return false; + for (uint16_t i = 0; i < cSections; i++) + if (pThis->paSegments[i].iGrpNm == idxGrpFlat) + pThis->paSegments[i].iGrpDef = iGrpDef; + pThis->idxGrpFlat = iGrpDef++; + + /* + * Data group definition (#2). + */ + /** @todo do we need to consider missing segments and ordering? */ + uint16_t cGrpNms = 0; + uint16_t aiGrpNms[2] = { 0, 0 }; /* Shut up, GCC. */ + if (fHaveData) + aiGrpNms[cGrpNms++] = idxGrpData; + for (uint32_t iGrpNm = 0; iGrpNm < cGrpNms; iGrpNm++) + { + if (!omfWriter_GrpDefBegin(pThis, aiGrpNms[iGrpNm])) + return false; + for (uint16_t i = 0; i < cSections; i++) + if (pThis->paSegments[i].iGrpNm == aiGrpNms[iGrpNm]) + { + pThis->paSegments[i].iGrpDef = iGrpDef; + if (!omfWriter_GrpDefAddSegDef(pThis, pThis->paSegments[i].iSegDef)) + return false; + } + if (!omfWriter_GrpDefEnd(pThis)) + return false; + iGrpDef++; + } + + return true; +} + +static bool convertElfSymbolsToPubDefsAndExtDefs(POMFWRITER pThis, PCELFDETAILS pElfStuff) +{ + if (!pElfStuff->cSymbols) + return true; + + /* + * Process the symbols the first. + */ + uint32_t cAbsSyms = 0; + uint32_t cExtSyms = 0; + uint32_t cPubSyms = 0; + for (uint32_t iSeg = 0; iSeg < pThis->cSegments; iSeg++) + pThis->paSegments[iSeg].cPubDefs = 0; + + uint32_t const cSections = pElfStuff->pEhdr->e_shnum; + uint32_t const cSymbols = pElfStuff->cSymbols; + Elf64_Sym const * const paSymbols = pElfStuff->paSymbols; + for (uint32_t iSym = 0; iSym < cSymbols; iSym++) + { + const uint8_t bBind = ELF64_ST_BIND(paSymbols[iSym].st_info); + const uint8_t bType = ELF64_ST_TYPE(paSymbols[iSym].st_info); + const char *pszSymName = &pElfStuff->pchStrTab[paSymbols[iSym].st_name]; + if ( *pszSymName == '\0' + && bType == STT_SECTION + && paSymbols[iSym].st_shndx < cSections) + pszSymName = &pElfStuff->pchShStrTab[pElfStuff->paShdrs[paSymbols[iSym].st_shndx].sh_name]; + + pThis->paSymbols[iSym].enmType = OMFSYMTYPE_IGNORED; + pThis->paSymbols[iSym].idx = UINT16_MAX; + pThis->paSymbols[iSym].idxSegDef = UINT16_MAX; + pThis->paSymbols[iSym].idxGrpDef = UINT16_MAX; + + uint32_t const idxSection = paSymbols[iSym].st_shndx; + if (idxSection == SHN_UNDEF) + { + if (bBind == STB_GLOBAL) + { + pThis->paSymbols[iSym].enmType = OMFSYMTYPE_EXTDEF; + cExtSyms++; + if (*pszSymName == '\0') + return error(pThis->pszSrc, "External symbol #%u (%s) has an empty name.\n", iSym, pszSymName); + } + else if (bBind != STB_LOCAL || iSym != 0) /* Entry zero is usually a dummy. */ + return error(pThis->pszSrc, "Unsupported or invalid bind type %#x for undefined symbol #%u (%s)\n", + bBind, iSym, pszSymName); + } + else if (idxSection < cSections) + { + pThis->paSymbols[iSym].idxSegDef = pThis->paSegments[idxSection].iSegDef; + pThis->paSymbols[iSym].idxGrpDef = pThis->paSegments[idxSection].iGrpDef; + if (bBind == STB_GLOBAL) + { + pThis->paSymbols[iSym].enmType = OMFSYMTYPE_PUBDEF; + pThis->paSegments[idxSection].cPubDefs++; + cPubSyms++; + if (bType == STT_SECTION) + return error(pThis->pszSrc, "Don't know how to export STT_SECTION symbol #%u (%s)\n", iSym, pszSymName); + if (*pszSymName == '\0') + return error(pThis->pszSrc, "Public symbol #%u (%s) has an empty name.\n", iSym, pszSymName); + } + else if (bType == STT_SECTION) + pThis->paSymbols[iSym].enmType = OMFSYMTYPE_SEGDEF; + else + pThis->paSymbols[iSym].enmType = OMFSYMTYPE_INTERNAL; + } + else if (idxSection == SHN_ABS) + { + if (bType != STT_FILE) + { + if (bBind == STB_GLOBAL) + { + pThis->paSymbols[iSym].enmType = OMFSYMTYPE_PUBDEF; + pThis->paSymbols[iSym].idxSegDef = 0; + pThis->paSymbols[iSym].idxGrpDef = 0; + cAbsSyms++; + if (*pszSymName == '\0') + return error(pThis->pszSrc, "Public absolute symbol #%u (%s) has an empty name.\n", iSym, pszSymName); + } + else + return error(pThis->pszSrc, "Unsupported or invalid bind type %#x for absolute symbol #%u (%s)\n", + bBind, iSym, pszSymName); + } + } + else if (idxSection == SHN_COMMON) + return error(pThis->pszSrc, "Symbol #%u (%s) is in the unsupported 'common' section.\n", iSym, pszSymName); + else + return error(pThis->pszSrc, "Unsupported or invalid section number %#x for symbol #%u (%s)\n", + idxSection, iSym, pszSymName); + } + + /* + * Emit the PUBDEFs the first time around (see order of records in TIS spec). + */ + uint16_t idxPubDef = 1; + if (cPubSyms) + { + for (uint32_t iSeg = 0; iSeg < pThis->cSegments; iSeg++) + if (pThis->paSegments[iSeg].cPubDefs > 0) + { + uint16_t const idxSegDef = pThis->paSegments[iSeg].iSegDef; + if (!omfWriter_PubDefBegin(pThis, pThis->paSegments[iSeg].iGrpDef, idxSegDef)) + return false; + for (uint16_t iSym = 0; iSym < cSymbols; iSym++) + if ( pThis->paSymbols[iSym].idxSegDef == idxSegDef + && pThis->paSymbols[iSym].enmType == OMFSYMTYPE_PUBDEF) + { + /* Underscore prefix all names not already underscored/mangled. */ + const char *pszName = &pElfStuff->pchStrTab[paSymbols[iSym].st_name]; + if (!omfWriter_PubDefAdd(pThis, paSymbols[iSym].st_value, pszName, pszName[0] != '_')) + return false; + pThis->paSymbols[iSym].idx = idxPubDef++; + } + if (!omfWriter_PubDefEnd(pThis)) + return false; + } + } + + if (cAbsSyms > 0) + { + if (!omfWriter_PubDefBegin(pThis, 0, 0)) + return false; + for (uint16_t iSym = 0; iSym < cSymbols; iSym++) + if ( pThis->paSymbols[iSym].idxSegDef == 0 + && pThis->paSymbols[iSym].enmType == OMFSYMTYPE_PUBDEF) + { + /* Underscore prefix all names not already underscored/mangled. */ + const char *pszName = &pElfStuff->pchStrTab[paSymbols[iSym].st_name]; + if (!omfWriter_PubDefAdd(pThis, paSymbols[iSym].st_value, pszName, pszName[0] != '_')) + return false; + pThis->paSymbols[iSym].idx = idxPubDef++; + } + if (!omfWriter_PubDefEnd(pThis)) + return false; + } + + /* + * Go over the symbol table and emit external definition records. + */ + if (!omfWriter_ExtDefBegin(pThis)) + return false; + uint16_t idxExtDef = 1; + for (uint16_t iSym = 0; iSym < cSymbols; iSym++) + if (pThis->paSymbols[iSym].enmType == OMFSYMTYPE_EXTDEF) + { + /* Underscore prefix all names not already underscored/mangled. */ + const char *pszName = &pElfStuff->pchStrTab[paSymbols[iSym].st_name]; + if (!omfWriter_ExtDefAdd(pThis, pszName, *pszName != '_')) + return false; + pThis->paSymbols[iSym].idx = idxExtDef++; + } + + if (!omfWriter_ExtDefEnd(pThis)) + return false; + + return true; +} + +/** + * @callback_method_impl{FNRTSORTCMP, For Elf64_Rela tables.} + */ +static DECLCALLBACK(int) convertElfCompareRelA(void const *pvElement1, void const *pvElement2, void *pvUser) +{ + Elf64_Rela const *pReloc1 = (Elf64_Rela const *)pvElement1; + Elf64_Rela const *pReloc2 = (Elf64_Rela const *)pvElement2; + if (pReloc1->r_offset < pReloc2->r_offset) + return -1; + if (pReloc1->r_offset > pReloc2->r_offset) + return 1; + RT_NOREF_PV(pvUser); + return 0; +} + +static bool convertElfSectionsToLeDataAndFixupps(POMFWRITER pThis, PCELFDETAILS pElfStuff, uint8_t const *pbFile, size_t cbFile) +{ + Elf64_Sym const *paSymbols = pElfStuff->paSymbols; + Elf64_Shdr const *paShdrs = pElfStuff->paShdrs; + bool fRet = true; + RT_NOREF_PV(cbFile); + + for (uint32_t i = 1; i < pThis->cSegments; i++) + { + if (pThis->paSegments[i].iSegDef == UINT16_MAX) + continue; + + const char *pszSegNm = &pElfStuff->pchShStrTab[paShdrs[i].sh_name]; + bool const fRelocs = i + 1 < pThis->cSegments && paShdrs[i + 1].sh_type == SHT_RELA; + uint32_t cRelocs = fRelocs ? paShdrs[i + 1].sh_size / sizeof(Elf64_Rela) : 0; + Elf64_Rela const *paRelocs = fRelocs ? (Elf64_Rela *)&pbFile[paShdrs[i + 1].sh_offset] : NULL; + Elf64_Xword cbVirtData = paShdrs[i].sh_size; + Elf64_Xword cbData = paShdrs[i].sh_type == SHT_NOBITS ? 0 : cbVirtData; + uint8_t const *pbData = &pbFile[paShdrs[i].sh_offset]; + uint32_t off = 0; + + /* We sort fixups by r_offset in order to more easily split them into chunks. */ + RTSortShell((void *)paRelocs, cRelocs, sizeof(paRelocs[0]), convertElfCompareRelA, NULL); + + /* The OMF record size requires us to split larger sections up. To make + life simple, we fill zeros for unitialized (BSS) stuff. */ + const uint32_t cbMaxData = RT_MIN(OMF_MAX_RECORD_PAYLOAD - 1 - (pThis->paSegments[i].iSegDef >= 128) - 4 - 1, _1K); + while (cbVirtData > 0) + { + /* Figure out how many bytes to put out in this chunk. Must make sure + fixups doesn't cross chunk boundraries. ASSUMES sorted relocs. */ + uint32_t cChunkRelocs = cRelocs; + uint32_t cbChunk = cbVirtData; + uint32_t offEnd = off + cbChunk; + if (cbChunk > cbMaxData) + { + cbChunk = cbMaxData; + offEnd = off + cbChunk; + cChunkRelocs = 0; + + /* Quickly determin the reloc range. */ + while ( cChunkRelocs < cRelocs + && paRelocs[cChunkRelocs].r_offset < offEnd) + cChunkRelocs++; + + /* Ensure final reloc doesn't go beyond chunk. */ + while ( cChunkRelocs > 0 + && paRelocs[cChunkRelocs - 1].r_offset + + ELF_AMD64_RELOC_SIZE(ELF64_R_TYPE(paRelocs[cChunkRelocs - 1].r_info)) + > offEnd) + { + uint32_t cbDrop = offEnd - paRelocs[cChunkRelocs - 1].r_offset; + cbChunk -= cbDrop; + offEnd -= cbDrop; + cChunkRelocs--; + } + + if (!cbVirtData) + return error(pThis->pszSrc, "Wtf? cbVirtData is zero!\n"); + } + if (g_cVerbose >= 2) + printf("debug: LEDATA off=%#x cb=%#x cRelocs=%#x sect=#%u segdef=%#x grpdef=%#x '%s'\n", + off, cbChunk, cRelocs, i, pThis->paSegments[i].iSegDef, pThis->paSegments[i].iGrpDef, pszSegNm); + + /* + * We stash the bytes into the OMF writer record buffer, receiving a + * pointer to the start of it so we can make adjustments if necessary. + */ + uint8_t *pbCopy; + if (!omfWriter_LEDataBeginEx(pThis, pThis->paSegments[i].iSegDef, off, cbChunk, cbData, pbData, &pbCopy)) + return false; + + /* + * Convert fiuxps. + */ + for (uint32_t iReloc = 0; iReloc < cChunkRelocs; iReloc++) + { + /* Get the OMF and ELF data for the symbol the reloc references. */ + uint32_t const uType = ELF64_R_TYPE(paRelocs[iReloc].r_info); + uint32_t const iSymbol = ELF64_R_SYM(paRelocs[iReloc].r_info); + Elf64_Sym const * const pElfSym = &paSymbols[iSymbol]; + POMFSYMBOL const pOmfSym = &pThis->paSymbols[iSymbol]; + const char * const pszSymName = &pElfStuff->pchStrTab[pElfSym->st_name]; + + /* Calc fixup location in the pending chunk and setup a flexible pointer to it. */ + uint16_t offDataRec = (uint16_t)(paRelocs[iReloc].r_offset - off); + RTPTRUNION uLoc; + uLoc.pu8 = &pbCopy[offDataRec]; + + /* OMF fixup data initialized with typical defaults. */ + bool fSelfRel = true; + uint8_t bLocation = OMF_FIX_LOC_32BIT_OFFSET; + uint8_t bFrame = OMF_FIX_F_GRPDEF; + uint16_t idxFrame = pThis->idxGrpFlat; + uint8_t bTarget; + uint16_t idxTarget; + bool fTargetDisp; + uint32_t offTargetDisp; + switch (pOmfSym->enmType) + { + case OMFSYMTYPE_INTERNAL: + case OMFSYMTYPE_PUBDEF: + bTarget = OMF_FIX_T_SEGDEF; + idxTarget = pOmfSym->idxSegDef; + fTargetDisp = true; + offTargetDisp = pElfSym->st_value; + break; + + case OMFSYMTYPE_SEGDEF: + bTarget = OMF_FIX_T_SEGDEF_NO_DISP; + idxTarget = pOmfSym->idxSegDef; + fTargetDisp = false; + offTargetDisp = 0; + break; + + case OMFSYMTYPE_EXTDEF: + bTarget = OMF_FIX_T_EXTDEF_NO_DISP; + idxTarget = pOmfSym->idx; + fTargetDisp = false; + offTargetDisp = 0; + break; + + default: + return error(pThis->pszSrc, "Relocation in segment #%u '%s' references ignored or invalid symbol (%s)\n", + i, pszSegNm, pszSymName); + } + + /* Do COFF relocation type conversion. */ + switch (uType) + { + case R_X86_64_64: + { + int64_t iAddend = paRelocs[iReloc].r_addend; + if (iAddend > _1G || iAddend < -_1G) + fRet = error(pThis->pszSrc, "R_X86_64_64 with large addend (%" ELF_FMT_D64 ") at %#x in segment #%u '%s'\n", + iAddend, paRelocs[iReloc].r_offset, i, pszSegNm); + *uLoc.pu64 = iAddend; + fSelfRel = false; + break; + } + + case R_X86_64_32: + case R_X86_64_32S: /* signed, unsigned, whatever. */ + fSelfRel = false; + RT_FALL_THRU(); + case R_X86_64_PC32: + case R_X86_64_PLT32: /* binutils commit 451875b4f976a527395e9303224c7881b65e12ed feature/regression. */ + { + /* defaults are ok, just handle the addend. */ + int32_t iAddend = paRelocs[iReloc].r_addend; + if (iAddend != paRelocs[iReloc].r_addend) + fRet = error(pThis->pszSrc, "R_X86_64_PC32 with large addend (%d) at %#x in segment #%u '%s'\n", + iAddend, paRelocs[iReloc].r_offset, i, pszSegNm); + if (fSelfRel) + *uLoc.pu32 = iAddend + 4; + else + *uLoc.pu32 = iAddend; + break; + } + + case R_X86_64_NONE: + continue; /* Ignore this one */ + + case R_X86_64_GOT32: + case R_X86_64_COPY: + case R_X86_64_GLOB_DAT: + case R_X86_64_JMP_SLOT: + case R_X86_64_RELATIVE: + case R_X86_64_GOTPCREL: + case R_X86_64_16: + case R_X86_64_PC16: + case R_X86_64_8: + case R_X86_64_PC8: + case R_X86_64_DTPMOD64: + case R_X86_64_DTPOFF64: + case R_X86_64_TPOFF64: + case R_X86_64_TLSGD: + case R_X86_64_TLSLD: + case R_X86_64_DTPOFF32: + case R_X86_64_GOTTPOFF: + case R_X86_64_TPOFF32: + default: + return error(pThis->pszSrc, "Unsupported fixup type %#x (%s) at rva=%#x in section #%u '%s' against '%s'\n", + uType, g_apszElfAmd64RelTypes[uType], paRelocs[iReloc].r_offset, i, pszSegNm, pszSymName); + } + + /* Add the fixup. */ + if (idxFrame == UINT16_MAX) + error(pThis->pszSrc, "idxFrame=UINT16_MAX for %s type=%s\n", pszSymName, g_apszElfAmd64RelTypes[uType]); + fRet = omfWriter_LEDataAddFixup(pThis, offDataRec, fSelfRel, bLocation, bFrame, idxFrame, + bTarget, idxTarget, fTargetDisp, offTargetDisp) && fRet; + } + + /* + * Write the LEDATA and associated FIXUPPs. + */ + if (!omfWriter_LEDataEnd(pThis)) + return false; + + /* + * Advance. + */ + paRelocs += cChunkRelocs; + cRelocs -= cChunkRelocs; + if (cbData > cbChunk) + { + cbData -= cbChunk; + pbData += cbChunk; + } + else + cbData = 0; + off += cbChunk; + cbVirtData -= cbChunk; + } + } + + return fRet; +} + + +static bool convertElfToOmf(const char *pszFile, uint8_t const *pbFile, size_t cbFile, FILE *pDst) +{ + /* + * Validate the source file a little. + */ + ELFDETAILS ElfStuff; + if (!validateElf(pszFile, pbFile, cbFile, &ElfStuff)) + return false; + + /* + * Instantiate the OMF writer. + */ + POMFWRITER pThis = omfWriter_Create(pszFile, ElfStuff.pEhdr->e_shnum, ElfStuff.cSymbols, pDst); + if (!pThis) + return false; + + /* + * Write the OMF object file. + */ + if (omfWriter_BeginModule(pThis, pszFile)) + { + if ( convertElfSectionsToSegDefsAndGrpDefs(pThis, &ElfStuff) + && convertElfSymbolsToPubDefsAndExtDefs(pThis, &ElfStuff) + && omfWriter_LinkPassSeparator(pThis) + && convertElfSectionsToLeDataAndFixupps(pThis, &ElfStuff, pbFile, cbFile) + && omfWriter_EndModule(pThis) ) + { + + omfWriter_Destroy(pThis); + return true; + } + } + + omfWriter_Destroy(pThis); + return false; +} + + + +/********************************************************************************************************************************* +* COFF -> OMF Converter * +*********************************************************************************************************************************/ + +/** AMD64 relocation type names for (Microsoft) COFF. */ +static const char * const g_apszCoffAmd64RelTypes[] = +{ + "ABSOLUTE", + "ADDR64", + "ADDR32", + "ADDR32NB", + "REL32", + "REL32_1", + "REL32_2", + "REL32_3", + "REL32_4", + "REL32_5", + "SECTION", + "SECREL", + "SECREL7", + "TOKEN", + "SREL32", + "PAIR", + "SSPAN32" +}; + +/** AMD64 relocation type sizes for (Microsoft) COFF. */ +static uint8_t const g_acbCoffAmd64RelTypes[] = +{ + 8, /* ABSOLUTE */ + 8, /* ADDR64 */ + 4, /* ADDR32 */ + 4, /* ADDR32NB */ + 4, /* REL32 */ + 4, /* REL32_1 */ + 4, /* REL32_2 */ + 4, /* REL32_3 */ + 4, /* REL32_4 */ + 4, /* REL32_5 */ + 2, /* SECTION */ + 4, /* SECREL */ + 1, /* SECREL7 */ + 0, /* TOKEN */ + 4, /* SREL32 */ + 0, /* PAIR */ + 4, /* SSPAN32 */ +}; + +/** Macro for getting the size of a AMD64 COFF relocation. */ +#define COFF_AMD64_RELOC_SIZE(a_Type) ( (a_Type) < RT_ELEMENTS(g_acbCoffAmd64RelTypes) ? g_acbCoffAmd64RelTypes[(a_Type)] : 1) + + +static const char *coffGetSymbolName(PCIMAGE_SYMBOL pSym, const char *pchStrTab, uint32_t cbStrTab, char pszShortName[16]) +{ + if (pSym->N.Name.Short != 0) + { + memcpy(pszShortName, pSym->N.ShortName, 8); + pszShortName[8] = '\0'; + return pszShortName; + } + if (pSym->N.Name.Long < cbStrTab) + { + uint32_t const cbLeft = cbStrTab - pSym->N.Name.Long; + const char *pszRet = pchStrTab + pSym->N.Name.Long; + if (memchr(pszRet, '\0', cbLeft) != NULL) + return pszRet; + } + error("<null>", "Invalid string table index %#x!\n", pSym->N.Name.Long); + return "Invalid Symbol Table Entry"; +} + +static bool validateCoff(const char *pszFile, uint8_t const *pbFile, size_t cbFile) +{ + /* + * Validate the header and our other expectations. + */ + PIMAGE_FILE_HEADER pHdr = (PIMAGE_FILE_HEADER)pbFile; + if (pHdr->Machine != IMAGE_FILE_MACHINE_AMD64) + return error(pszFile, "Expected IMAGE_FILE_MACHINE_AMD64 not %#x\n", pHdr->Machine); + if (pHdr->SizeOfOptionalHeader != 0) + return error(pszFile, "Expected SizeOfOptionalHeader to be zero, not %#x\n", pHdr->SizeOfOptionalHeader); + if (pHdr->NumberOfSections == 0) + return error(pszFile, "Expected NumberOfSections to be non-zero\n"); + uint32_t const cbHeaders = pHdr->NumberOfSections * sizeof(IMAGE_SECTION_HEADER) + sizeof(*pHdr); + if (cbHeaders > cbFile) + return error(pszFile, "Section table goes beyond the end of the of the file (cSections=%#x)\n", pHdr->NumberOfSections); + if (pHdr->NumberOfSymbols) + { + if ( pHdr->PointerToSymbolTable >= cbFile + || pHdr->NumberOfSymbols * (uint64_t)IMAGE_SIZE_OF_SYMBOL > cbFile) + return error(pszFile, "Symbol table goes beyond the end of the of the file (cSyms=%#x, offFile=%#x)\n", + pHdr->NumberOfSymbols, pHdr->PointerToSymbolTable); + } + + return true; +} + + +static bool convertCoffSectionsToSegDefsAndGrpDefs(POMFWRITER pThis, PCIMAGE_SECTION_HEADER paShdrs, uint16_t cSections) +{ + /* + * Do the list of names pass. + */ + uint16_t idxGrpFlat, idxGrpData; + uint16_t idxClassCode, idxClassData, idxClassDebugSymbols, idxClassDebugTypes; + if ( !omfWriter_LNamesBegin(pThis, true /*fAddZeroEntry*/) + || !omfWriter_LNamesAddN(pThis, RT_STR_TUPLE("FLAT"), &idxGrpFlat) + || !omfWriter_LNamesAddN(pThis, RT_STR_TUPLE("BS3DATA64_GROUP"), &idxGrpData) + || !omfWriter_LNamesAddN(pThis, RT_STR_TUPLE("BS3CLASS64CODE"), &idxClassCode) + || !omfWriter_LNamesAddN(pThis, RT_STR_TUPLE("FAR_DATA"), &idxClassData) + || !omfWriter_LNamesAddN(pThis, RT_STR_TUPLE("DEBSYM"), &idxClassDebugSymbols) + || !omfWriter_LNamesAddN(pThis, RT_STR_TUPLE("DEBTYP"), &idxClassDebugTypes) + ) + return false; + + bool fHaveData = false; + for (uint16_t i = 0; i < cSections; i++) + { + /* Copy the name and terminate it. */ + char szName[32]; + memcpy(szName, paShdrs[i].Name, sizeof(paShdrs[i].Name)); + unsigned cchName = sizeof(paShdrs[i].Name); + while (cchName > 0 && RT_C_IS_SPACE(szName[cchName - 1])) + cchName--; + if (cchName == 0) + return error(pThis->pszSrc, "Section #%u has an empty name!\n", i); + szName[cchName] = '\0'; + + if ( (paShdrs[i].Characteristics & (IMAGE_SCN_LNK_REMOVE | IMAGE_SCN_LNK_INFO)) + || strcmp(szName, ".pdata") == 0 /* Exception stuff, I think, so discard it. */ + || strcmp(szName, ".xdata") == 0 /* Ditto. */ ) + { + pThis->paSegments[i].iSegDef = UINT16_MAX; + pThis->paSegments[i].iGrpDef = UINT16_MAX; + pThis->paSegments[i].iSegNm = UINT16_MAX; + pThis->paSegments[i].iGrpNm = UINT16_MAX; + pThis->paSegments[i].iClassNm = UINT16_MAX; + pThis->paSegments[i].pszName = NULL; + } + else + { + /* Translate the name, group and class. */ + if ( strcmp(szName, ".text") == 0 + || strcmp(szName, ".text$mn") == 0 /* Seen first in VC++ 14.1 (could be older). */) + { + strcpy(szName, "BS3TEXT64"); + pThis->paSegments[i].iGrpNm = idxGrpFlat; + pThis->paSegments[i].iClassNm = idxClassCode; + } + else if (strcmp(szName, ".data") == 0) + { + strcpy(szName, "BS3DATA64"); + pThis->paSegments[i].iGrpNm = idxGrpData; + pThis->paSegments[i].iClassNm = idxClassData; + } + else if (strcmp(szName, ".bss") == 0) + { + strcpy(szName, "BS3BSS64"); + pThis->paSegments[i].iGrpNm = idxGrpData; + pThis->paSegments[i].iClassNm = idxClassData; + } + else if (strcmp(szName, ".rdata") == 0) + { + strcpy(szName, "BS3DATA64CONST"); + pThis->paSegments[i].iGrpNm = idxGrpData; + pThis->paSegments[i].iClassNm = idxClassData; + } + else if (strcmp(szName, ".debug$S") == 0) + { + strcpy(szName, "$$SYMBOLS"); + pThis->paSegments[i].iGrpNm = UINT16_MAX; + pThis->paSegments[i].iClassNm = idxClassDebugSymbols; + } + else if (strcmp(szName, ".debug$T") == 0) + { + strcpy(szName, "$$TYPES"); + pThis->paSegments[i].iGrpNm = UINT16_MAX; + pThis->paSegments[i].iClassNm = idxClassDebugTypes; + } + else if (paShdrs[i].Characteristics & (IMAGE_SCN_MEM_EXECUTE | IMAGE_SCN_CNT_CODE)) + { + pThis->paSegments[i].iGrpNm = idxGrpFlat; + pThis->paSegments[i].iClassNm = idxClassCode; + error(pThis->pszSrc, "Unknown code segment: '%s'\n", szName); + } + else + { + pThis->paSegments[i].iGrpNm = idxGrpData; + pThis->paSegments[i].iClassNm = idxClassData; + error(pThis->pszSrc, "Unknown data (?) segment: '%s'\n", szName); + } + + /* Save the name. */ + pThis->paSegments[i].pszName = strdup(szName); + if (!pThis->paSegments[i].pszName) + return error(pThis->pszSrc, "Out of memory!\n"); + + /* Add the section name. */ + if (!omfWriter_LNamesAdd(pThis, pThis->paSegments[i].pszName, &pThis->paSegments[i].iSegNm)) + return false; + + fHaveData |= pThis->paSegments[i].iGrpNm == idxGrpData; + } + } + + if (!omfWriter_LNamesEnd(pThis)) + return false; + + /* + * Emit segment definitions. + */ + uint16_t iSegDef = 1; /* Start counting at 1. */ + for (uint16_t i = 0; i < cSections; i++) + { + if (pThis->paSegments[i].iSegDef == UINT16_MAX) + continue; + + uint8_t bSegAttr = 0; + + /* The A field. */ + switch (paShdrs[i].Characteristics & IMAGE_SCN_ALIGN_MASK) + { + default: + case IMAGE_SCN_ALIGN_1BYTES: + bSegAttr |= 1 << 5; + break; + case IMAGE_SCN_ALIGN_2BYTES: + bSegAttr |= 2 << 5; + break; + case IMAGE_SCN_ALIGN_4BYTES: + bSegAttr |= 5 << 5; + break; + case IMAGE_SCN_ALIGN_8BYTES: + case IMAGE_SCN_ALIGN_16BYTES: + bSegAttr |= 3 << 5; + break; + case IMAGE_SCN_ALIGN_32BYTES: + case IMAGE_SCN_ALIGN_64BYTES: + case IMAGE_SCN_ALIGN_128BYTES: + case IMAGE_SCN_ALIGN_256BYTES: + bSegAttr |= 4 << 5; + break; + case IMAGE_SCN_ALIGN_512BYTES: + case IMAGE_SCN_ALIGN_1024BYTES: + case IMAGE_SCN_ALIGN_2048BYTES: + case IMAGE_SCN_ALIGN_4096BYTES: + case IMAGE_SCN_ALIGN_8192BYTES: + bSegAttr |= 6 << 5; /* page aligned, pharlabs extension. */ + break; + } + + /* The C field. */ + bSegAttr |= 2 << 2; /* public */ + + /* The B field. We don't have 4GB segments, so leave it as zero. */ + + /* The D field shall be set as we're doing USE32. */ + bSegAttr |= 1; + + + /* Done. */ + if (!omfWriter_SegDef(pThis, bSegAttr, paShdrs[i].SizeOfRawData, + pThis->paSegments[i].iSegNm, + pThis->paSegments[i].iClassNm)) + return false; + pThis->paSegments[i].iSegDef = iSegDef++; + } + + /* + * Flat group definition (#1) - special, no members. + */ + uint16_t iGrpDef = 1; + if ( !omfWriter_GrpDefBegin(pThis, idxGrpFlat) + || !omfWriter_GrpDefEnd(pThis)) + return false; + for (uint16_t i = 0; i < cSections; i++) + if (pThis->paSegments[i].iGrpNm == idxGrpFlat) + pThis->paSegments[i].iGrpDef = iGrpDef; + pThis->idxGrpFlat = iGrpDef++; + + /* + * Data group definition (#2). + */ + /** @todo do we need to consider missing segments and ordering? */ + uint16_t cGrpNms = 0; + uint16_t aiGrpNms[2] = { 0, 0 }; /* Shut up, GCC. */ + if (fHaveData) + aiGrpNms[cGrpNms++] = idxGrpData; + for (uint32_t iGrpNm = 0; iGrpNm < cGrpNms; iGrpNm++) + { + if (!omfWriter_GrpDefBegin(pThis, aiGrpNms[iGrpNm])) + return false; + for (uint16_t i = 0; i < cSections; i++) + if (pThis->paSegments[i].iGrpNm == aiGrpNms[iGrpNm]) + { + pThis->paSegments[i].iGrpDef = iGrpDef; + if (!omfWriter_GrpDefAddSegDef(pThis, pThis->paSegments[i].iSegDef)) + return false; + } + if (!omfWriter_GrpDefEnd(pThis)) + return false; + iGrpDef++; + } + + return true; +} + +/** + * This is for matching STATIC symbols with value 0 against the section name, + * to see if it's a section reference or symbol at offset 0 reference. + * + * @returns true / false. + * @param pszSymbol The symbol name. + * @param pachSectName8 The section name (8-bytes). + */ +static bool isCoffSymbolMatchingSectionName(const char *pszSymbol, uint8_t const pachSectName8[8]) +{ + uint32_t off = 0; + char ch; + while (off < 8 && (ch = pszSymbol[off]) != '\0') + { + if (ch != pachSectName8[off]) + return false; + off++; + } + while (off < 8) + { + if (!RT_C_IS_SPACE((ch = pachSectName8[off]))) + return ch == '\0'; + off++; + } + return true; +} + +static bool convertCoffSymbolsToPubDefsAndExtDefs(POMFWRITER pThis, PCIMAGE_SYMBOL paSymbols, uint16_t cSymbols, + const char *pchStrTab, PCIMAGE_SECTION_HEADER paShdrs) +{ + + if (!cSymbols) + return true; + uint32_t const cbStrTab = *(uint32_t const *)pchStrTab; + char szShort[16]; + + /* + * Process the symbols the first. + */ + uint32_t iSymImageBase = UINT32_MAX; + uint32_t cAbsSyms = 0; + uint32_t cExtSyms = 0; + uint32_t cPubSyms = 0; + for (uint32_t iSeg = 0; iSeg < pThis->cSegments; iSeg++) + pThis->paSegments[iSeg].cPubDefs = 0; + + for (uint16_t iSym = 0; iSym < cSymbols; iSym++) + { + const char *pszSymName = coffGetSymbolName(&paSymbols[iSym], pchStrTab, cbStrTab, szShort); + + pThis->paSymbols[iSym].enmType = OMFSYMTYPE_IGNORED; + pThis->paSymbols[iSym].idx = UINT16_MAX; + pThis->paSymbols[iSym].idxSegDef = UINT16_MAX; + pThis->paSymbols[iSym].idxGrpDef = UINT16_MAX; + + int16_t const idxSection = paSymbols[iSym].SectionNumber; + if ( (idxSection >= 1 && idxSection <= (int32_t)pThis->cSegments) + || idxSection == IMAGE_SYM_ABSOLUTE) + { + switch (paSymbols[iSym].StorageClass) + { + case IMAGE_SYM_CLASS_EXTERNAL: + if (idxSection != IMAGE_SYM_ABSOLUTE) + { + if (pThis->paSegments[idxSection - 1].iSegDef != UINT16_MAX) + { + pThis->paSymbols[iSym].enmType = OMFSYMTYPE_PUBDEF; + pThis->paSymbols[iSym].idxSegDef = pThis->paSegments[idxSection - 1].iSegDef; + pThis->paSymbols[iSym].idxGrpDef = pThis->paSegments[idxSection - 1].iGrpDef; + pThis->paSegments[idxSection - 1].cPubDefs++; + cPubSyms++; + } + } + else + { + pThis->paSymbols[iSym].enmType = OMFSYMTYPE_PUBDEF; + pThis->paSymbols[iSym].idxSegDef = 0; + pThis->paSymbols[iSym].idxGrpDef = 0; + cAbsSyms++; + } + break; + + case IMAGE_SYM_CLASS_STATIC: + if ( paSymbols[iSym].Value == 0 + && idxSection != IMAGE_SYM_ABSOLUTE + && isCoffSymbolMatchingSectionName(pszSymName, paShdrs[idxSection - 1].Name) ) + { + pThis->paSymbols[iSym].enmType = OMFSYMTYPE_SEGDEF; + pThis->paSymbols[iSym].idxSegDef = pThis->paSegments[idxSection - 1].iSegDef; + pThis->paSymbols[iSym].idxGrpDef = pThis->paSegments[idxSection - 1].iGrpDef; + break; + } + RT_FALL_THRU(); + + case IMAGE_SYM_CLASS_END_OF_FUNCTION: + case IMAGE_SYM_CLASS_AUTOMATIC: + case IMAGE_SYM_CLASS_REGISTER: + case IMAGE_SYM_CLASS_LABEL: + case IMAGE_SYM_CLASS_MEMBER_OF_STRUCT: + case IMAGE_SYM_CLASS_ARGUMENT: + case IMAGE_SYM_CLASS_STRUCT_TAG: + case IMAGE_SYM_CLASS_MEMBER_OF_UNION: + case IMAGE_SYM_CLASS_UNION_TAG: + case IMAGE_SYM_CLASS_TYPE_DEFINITION: + case IMAGE_SYM_CLASS_ENUM_TAG: + case IMAGE_SYM_CLASS_MEMBER_OF_ENUM: + case IMAGE_SYM_CLASS_REGISTER_PARAM: + case IMAGE_SYM_CLASS_BIT_FIELD: + case IMAGE_SYM_CLASS_BLOCK: + case IMAGE_SYM_CLASS_FUNCTION: + case IMAGE_SYM_CLASS_END_OF_STRUCT: + case IMAGE_SYM_CLASS_FILE: + pThis->paSymbols[iSym].enmType = OMFSYMTYPE_INTERNAL; + if (idxSection != IMAGE_SYM_ABSOLUTE) + { + pThis->paSymbols[iSym].idxSegDef = pThis->paSegments[idxSection - 1].iSegDef; + pThis->paSymbols[iSym].idxGrpDef = pThis->paSegments[idxSection - 1].iGrpDef; + } + else + { + pThis->paSymbols[iSym].idxSegDef = 0; + pThis->paSymbols[iSym].idxGrpDef = 0; + } + break; + + case IMAGE_SYM_CLASS_SECTION: + case IMAGE_SYM_CLASS_EXTERNAL_DEF: + case IMAGE_SYM_CLASS_NULL: + case IMAGE_SYM_CLASS_UNDEFINED_LABEL: + case IMAGE_SYM_CLASS_UNDEFINED_STATIC: + case IMAGE_SYM_CLASS_CLR_TOKEN: + case IMAGE_SYM_CLASS_FAR_EXTERNAL: + case IMAGE_SYM_CLASS_WEAK_EXTERNAL: + return error(pThis->pszSrc, "Unsupported storage class value %#x for symbol #%u (%s)\n", + paSymbols[iSym].StorageClass, iSym, pszSymName); + + default: + return error(pThis->pszSrc, "Unknown storage class value %#x for symbol #%u (%s)\n", + paSymbols[iSym].StorageClass, iSym, pszSymName); + } + } + else if (idxSection == IMAGE_SYM_UNDEFINED) + { + if ( paSymbols[iSym].StorageClass == IMAGE_SYM_CLASS_EXTERNAL + || paSymbols[iSym].StorageClass == IMAGE_SYM_CLASS_EXTERNAL_DEF) + { + pThis->paSymbols[iSym].enmType = OMFSYMTYPE_EXTDEF; + cExtSyms++; + if (iSymImageBase == UINT32_MAX && strcmp(pszSymName, "__ImageBase") == 0) + iSymImageBase = iSym; + } + else + return error(pThis->pszSrc, "Unknown/unknown storage class value %#x for undefined symbol #%u (%s)\n", + paSymbols[iSym].StorageClass, iSym, pszSymName); + } + else if (idxSection != IMAGE_SYM_DEBUG) + return error(pThis->pszSrc, "Invalid section number %#x for symbol #%u (%s)\n", idxSection, iSym, pszSymName); + + /* Skip AUX symbols. */ + uint8_t cAuxSyms = paSymbols[iSym].NumberOfAuxSymbols; + while (cAuxSyms-- > 0) + { + iSym++; + pThis->paSymbols[iSym].enmType = OMFSYMTYPE_INVALID; + pThis->paSymbols[iSym].idx = UINT16_MAX; + } + } + + /* + * Emit the PUBDEFs the first time around (see order of records in TIS spec). + */ + uint16_t idxPubDef = 1; + if (cPubSyms) + { + for (uint32_t iSeg = 0; iSeg < pThis->cSegments; iSeg++) + if (pThis->paSegments[iSeg].cPubDefs > 0) + { + uint16_t const idxSegDef = pThis->paSegments[iSeg].iSegDef; + if (!omfWriter_PubDefBegin(pThis, pThis->paSegments[iSeg].iGrpDef, idxSegDef)) + return false; + for (uint16_t iSym = 0; iSym < cSymbols; iSym++) + if ( pThis->paSymbols[iSym].idxSegDef == idxSegDef + && pThis->paSymbols[iSym].enmType == OMFSYMTYPE_PUBDEF) + { + /* Underscore prefix all symbols not already underscored or mangled. */ + const char *pszName = coffGetSymbolName(&paSymbols[iSym], pchStrTab, cbStrTab, szShort); + if (!omfWriter_PubDefAdd(pThis, paSymbols[iSym].Value, pszName, pszName[0] != '_' && pszName[0] != '?')) + return false; + pThis->paSymbols[iSym].idx = idxPubDef++; + } + if (!omfWriter_PubDefEnd(pThis)) + return false; + } + } + + if (cAbsSyms > 0) + { + if (!omfWriter_PubDefBegin(pThis, 0, 0)) + return false; + for (uint16_t iSym = 0; iSym < cSymbols; iSym++) + if ( pThis->paSymbols[iSym].idxSegDef == 0 + && pThis->paSymbols[iSym].enmType == OMFSYMTYPE_PUBDEF) + { + /* Underscore prefix all symbols not already underscored or mangled. */ + const char *pszName = coffGetSymbolName(&paSymbols[iSym], pchStrTab, cbStrTab, szShort); + if (!omfWriter_PubDefAdd(pThis, paSymbols[iSym].Value, pszName, pszName[0] != '_' && pszName[0] != '?') ) + return false; + pThis->paSymbols[iSym].idx = idxPubDef++; + } + if (!omfWriter_PubDefEnd(pThis)) + return false; + } + + /* + * Go over the symbol table and emit external definition records. + */ + if (!omfWriter_ExtDefBegin(pThis)) + return false; + uint16_t idxExtDef = 1; + for (uint16_t iSym = 0; iSym < cSymbols; iSym++) + if (pThis->paSymbols[iSym].enmType == OMFSYMTYPE_EXTDEF) + { + /* Underscore prefix all symbols not already underscored or mangled. */ + const char *pszName = coffGetSymbolName(&paSymbols[iSym], pchStrTab, cbStrTab, szShort); + if (!omfWriter_ExtDefAdd(pThis, pszName, pszName[0] != '_' && pszName[0] != '?')) + return false; + pThis->paSymbols[iSym].idx = idxExtDef++; + } + + /* Always add an __ImageBase reference, in case we need it to deal with ADDR32NB fixups. */ + /** @todo maybe we don't actually need this and could use FLAT instead? */ + if (iSymImageBase != UINT32_MAX) + pThis->idxExtImageBase = pThis->paSymbols[iSymImageBase].idx; + else if (omfWriter_ExtDefAdd(pThis, "__ImageBase", false /*fPrependUnderscore*/)) + pThis->idxExtImageBase = idxExtDef; + else + return false; + + if (!omfWriter_ExtDefEnd(pThis)) + return false; + + return true; +} + + +static bool convertCoffSectionsToLeDataAndFixupps(POMFWRITER pThis, uint8_t const *pbFile, size_t cbFile, + PCIMAGE_SECTION_HEADER paShdrs, uint16_t cSections, + PCIMAGE_SYMBOL paSymbols, uint16_t cSymbols, const char *pchStrTab) +{ + RT_NOREF_PV(cbFile); + RT_NOREF_PV(cSections); + RT_NOREF_PV(cSymbols); + + uint32_t const cbStrTab = *(uint32_t const *)pchStrTab; + bool fRet = true; + for (uint32_t i = 0; i < pThis->cSegments; i++) + { + if (pThis->paSegments[i].iSegDef == UINT16_MAX) + continue; + + char szShortName[16]; + const char *pszSegNm = pThis->paSegments[i].pszName; + uint16_t cRelocs = paShdrs[i].NumberOfRelocations; + PCIMAGE_RELOCATION paRelocs = (PCIMAGE_RELOCATION)&pbFile[paShdrs[i].PointerToRelocations]; + uint32_t cbVirtData = paShdrs[i].SizeOfRawData; + uint32_t cbData = paShdrs[i].Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA ? 0 : cbVirtData; + uint8_t const *pbData = &pbFile[paShdrs[i].PointerToRawData]; + uint32_t off = 0; + + /* Check that the relocations are sorted and within the section. */ + for (uint32_t iReloc = 1; iReloc < cRelocs; iReloc++) + if (paRelocs[iReloc - 1].u.VirtualAddress >= paRelocs[iReloc].u.VirtualAddress) + return error(pThis->pszSrc, "Section #%u (%s) relocations aren't sorted\n", i, pszSegNm); + if ( cRelocs > 0 + && paRelocs[cRelocs - 1].u.VirtualAddress - paShdrs[i].VirtualAddress + + COFF_AMD64_RELOC_SIZE(paRelocs[cRelocs - 1].Type) > cbVirtData) + return error(pThis->pszSrc, + "Section #%u (%s) relocations beyond section data! cbVirtData=%#x RvaFix=%#x RVASeg=%#x type=%#x\n", + i, pszSegNm, cbVirtData, paRelocs[cRelocs - 1].u.VirtualAddress, paShdrs[i].VirtualAddress, + paRelocs[cRelocs - 1].Type); + + /* The OMF record size requires us to split larger sections up. To make + life simple, we fill zeros for unitialized (BSS) stuff. */ + const uint32_t cbMaxData = RT_MIN(OMF_MAX_RECORD_PAYLOAD - 1 - (pThis->paSegments[i].iSegDef >= 128) - 4 - 1, _1K); + while (cbVirtData > 0) + { + /* Figure out how many bytes to put out in this chunk. Must make sure + fixups doesn't cross chunk boundraries. ASSUMES sorted relocs. */ + uint32_t cChunkRelocs = cRelocs; + uint32_t cbChunk = cbVirtData; + uint32_t uRvaEnd = paShdrs[i].VirtualAddress + off + cbChunk; + if (cbChunk > cbMaxData) + { + cbChunk = cbMaxData; + uRvaEnd = paShdrs[i].VirtualAddress + off + cbChunk; + cChunkRelocs = 0; + + /* Quickly determin the reloc range. */ + while ( cChunkRelocs < cRelocs + && paRelocs[cChunkRelocs].u.VirtualAddress < uRvaEnd) + cChunkRelocs++; + + /* Ensure final reloc doesn't go beyond chunk. */ + while ( cChunkRelocs > 0 + && paRelocs[cChunkRelocs - 1].u.VirtualAddress + COFF_AMD64_RELOC_SIZE(paRelocs[cChunkRelocs - 1].Type) + > uRvaEnd) + { + uint32_t cbDrop = uRvaEnd - paRelocs[cChunkRelocs - 1].u.VirtualAddress; + cbChunk -= cbDrop; + uRvaEnd -= cbDrop; + cChunkRelocs--; + } + + if (!cbVirtData) + return error(pThis->pszSrc, "Wtf? cbVirtData is zero!\n"); + } + + /* + * We stash the bytes into the OMF writer record buffer, receiving a + * pointer to the start of it so we can make adjustments if necessary. + */ + uint8_t *pbCopy; + if (!omfWriter_LEDataBeginEx(pThis, pThis->paSegments[i].iSegDef, off, cbChunk, cbData, pbData, &pbCopy)) + return false; + + /* + * Convert fiuxps. + */ + uint32_t const uRvaChunk = paShdrs[i].VirtualAddress + off; + for (uint32_t iReloc = 0; iReloc < cChunkRelocs; iReloc++) + { + /* Get the OMF and COFF data for the symbol the reloc references. */ + if (paRelocs[iReloc].SymbolTableIndex >= pThis->cSymbols) + return error(pThis->pszSrc, "Relocation symtab index (%#x) is out of range in segment #%u '%s'\n", + paRelocs[iReloc].SymbolTableIndex, i, pszSegNm); + PCIMAGE_SYMBOL pCoffSym = &paSymbols[paRelocs[iReloc].SymbolTableIndex]; + POMFSYMBOL pOmfSym = &pThis->paSymbols[paRelocs[iReloc].SymbolTableIndex]; + + /* Calc fixup location in the pending chunk and setup a flexible pointer to it. */ + uint16_t offDataRec = (uint16_t)(paRelocs[iReloc].u.VirtualAddress - uRvaChunk); + RTPTRUNION uLoc; + uLoc.pu8 = &pbCopy[offDataRec]; + + /* OMF fixup data initialized with typical defaults. */ + bool fSelfRel = true; + uint8_t bLocation = OMF_FIX_LOC_32BIT_OFFSET; + uint8_t bFrame = OMF_FIX_F_GRPDEF; + uint16_t idxFrame = pThis->idxGrpFlat; + uint8_t bTarget; + uint16_t idxTarget; + bool fTargetDisp; + uint32_t offTargetDisp; + switch (pOmfSym->enmType) + { + case OMFSYMTYPE_INTERNAL: + case OMFSYMTYPE_PUBDEF: + bTarget = OMF_FIX_T_SEGDEF; + idxTarget = pOmfSym->idxSegDef; + fTargetDisp = true; + offTargetDisp = pCoffSym->Value; + break; + + case OMFSYMTYPE_SEGDEF: + bTarget = OMF_FIX_T_SEGDEF_NO_DISP; + idxTarget = pOmfSym->idxSegDef; + fTargetDisp = false; + offTargetDisp = 0; + break; + + case OMFSYMTYPE_EXTDEF: + bTarget = OMF_FIX_T_EXTDEF_NO_DISP; + idxTarget = pOmfSym->idx; + fTargetDisp = false; + offTargetDisp = 0; + break; + + default: + return error(pThis->pszSrc, "Relocation in segment #%u '%s' references ignored or invalid symbol (%s)\n", + i, pszSegNm, coffGetSymbolName(pCoffSym, pchStrTab, cbStrTab, szShortName)); + } + + /* Do COFF relocation type conversion. */ + switch (paRelocs[iReloc].Type) + { + case IMAGE_REL_AMD64_ADDR64: + { + uint64_t uAddend = *uLoc.pu64; + if (uAddend > _1G) + fRet = error(pThis->pszSrc, "ADDR64 with large addend (%#llx) at %#x in segment #%u '%s'\n", + uAddend, paRelocs[iReloc].u.VirtualAddress, i, pszSegNm); + fSelfRel = false; + break; + } + + case IMAGE_REL_AMD64_REL32_1: + case IMAGE_REL_AMD64_REL32_2: + case IMAGE_REL_AMD64_REL32_3: + case IMAGE_REL_AMD64_REL32_4: + case IMAGE_REL_AMD64_REL32_5: + /** @todo Check whether OMF read addends from the data or relies on the + * displacement. Also, check what it's relative to. */ + *uLoc.pu32 -= paRelocs[iReloc].Type - IMAGE_REL_AMD64_REL32; + break; + + case IMAGE_REL_AMD64_ADDR32: + fSelfRel = false; + break; + + case IMAGE_REL_AMD64_ADDR32NB: + fSelfRel = false; + bFrame = OMF_FIX_F_EXTDEF; + idxFrame = pThis->idxExtImageBase; + break; + + case IMAGE_REL_AMD64_REL32: + /* defaults are ok. */ + break; + + case IMAGE_REL_AMD64_SECTION: + bLocation = OMF_FIX_LOC_16BIT_SEGMENT; + RT_FALL_THRU(); + + case IMAGE_REL_AMD64_SECREL: + fSelfRel = false; + if (pOmfSym->enmType == OMFSYMTYPE_EXTDEF) + { + bFrame = OMF_FIX_F_EXTDEF; + idxFrame = pOmfSym->idx; + } + else + { + bFrame = OMF_FIX_F_SEGDEF; + idxFrame = pOmfSym->idxSegDef; + } + break; + + case IMAGE_REL_AMD64_ABSOLUTE: + continue; /* Ignore it like the PECOFF.DOC says we should. */ + + case IMAGE_REL_AMD64_SECREL7: + default: + return error(pThis->pszSrc, "Unsupported fixup type %#x (%s) at rva=%#x in section #%u '%-8.8s'\n", + paRelocs[iReloc].Type, + paRelocs[iReloc].Type < RT_ELEMENTS(g_apszCoffAmd64RelTypes) + ? g_apszCoffAmd64RelTypes[paRelocs[iReloc].Type] : "unknown", + paRelocs[iReloc].u.VirtualAddress, i, paShdrs[i].Name); + } + + /* Add the fixup. */ + if (idxFrame == UINT16_MAX) + error(pThis->pszSrc, "idxFrame=UINT16_MAX for %s type=%s\n", + coffGetSymbolName(pCoffSym, pchStrTab, cbStrTab, szShortName), + g_apszCoffAmd64RelTypes[paRelocs[iReloc].Type]); + fRet = omfWriter_LEDataAddFixup(pThis, offDataRec, fSelfRel, bLocation, bFrame, idxFrame, + bTarget, idxTarget, fTargetDisp, offTargetDisp) && fRet; + } + + /* + * Write the LEDATA and associated FIXUPPs. + */ + if (!omfWriter_LEDataEnd(pThis)) + return false; + + /* + * Advance. + */ + paRelocs += cChunkRelocs; + cRelocs -= cChunkRelocs; + if (cbData > cbChunk) + { + cbData -= cbChunk; + pbData += cbChunk; + } + else + cbData = 0; + off += cbChunk; + cbVirtData -= cbChunk; + } + } + + return fRet; +} + + +static bool convertCoffToOmf(const char *pszFile, uint8_t const *pbFile, size_t cbFile, FILE *pDst) +{ + /* + * Validate the source file a little. + */ + if (!validateCoff(pszFile, pbFile, cbFile)) + return false; + + /* + * Instantiate the OMF writer. + */ + PIMAGE_FILE_HEADER pHdr = (PIMAGE_FILE_HEADER)pbFile; + POMFWRITER pThis = omfWriter_Create(pszFile, pHdr->NumberOfSections, pHdr->NumberOfSymbols, pDst); + if (!pThis) + return false; + + /* + * Write the OMF object file. + */ + if (omfWriter_BeginModule(pThis, pszFile)) + { + PCIMAGE_SECTION_HEADER paShdrs = (PCIMAGE_SECTION_HEADER)(pHdr + 1); + PCIMAGE_SYMBOL paSymTab = (PCIMAGE_SYMBOL)&pbFile[pHdr->PointerToSymbolTable]; + const char *pchStrTab = (const char *)&paSymTab[pHdr->NumberOfSymbols]; + if ( convertCoffSectionsToSegDefsAndGrpDefs(pThis, paShdrs, pHdr->NumberOfSections) + && convertCoffSymbolsToPubDefsAndExtDefs(pThis, paSymTab, pHdr->NumberOfSymbols, pchStrTab, paShdrs) + && omfWriter_LinkPassSeparator(pThis) + && convertCoffSectionsToLeDataAndFixupps(pThis, pbFile, cbFile, paShdrs, pHdr->NumberOfSections, + paSymTab, pHdr->NumberOfSymbols, pchStrTab) + && omfWriter_EndModule(pThis) ) + { + + omfWriter_Destroy(pThis); + return true; + } + } + + omfWriter_Destroy(pThis); + return false; +} + + +/********************************************************************************************************************************* +* Mach-O/AMD64 -> OMF/i386 Converter * +*********************************************************************************************************************************/ + +//#define MACHO_TO_OMF_CONVERSION +#ifdef MACHO_TO_OMF_CONVERSION + +/** AMD64 relocation type names for Mach-O. */ +static const char * const g_apszMachOAmd64RelTypes[] = +{ + "X86_64_RELOC_UNSIGNED", + "X86_64_RELOC_SIGNED", + "X86_64_RELOC_BRANCH", + "X86_64_RELOC_GOT_LOAD", + "X86_64_RELOC_GOT", + "X86_64_RELOC_SUBTRACTOR", + "X86_64_RELOC_SIGNED_1", + "X86_64_RELOC_SIGNED_2", + "X86_64_RELOC_SIGNED_4" +}; + +/** AMD64 relocation type sizes for Mach-O. */ +static uint8_t const g_acbMachOAmd64RelTypes[] = +{ + 8, /* X86_64_RELOC_UNSIGNED */ + 4, /* X86_64_RELOC_SIGNED */ + 4, /* X86_64_RELOC_BRANCH */ + 4, /* X86_64_RELOC_GOT_LOAD */ + 4, /* X86_64_RELOC_GOT */ + 8, /* X86_64_RELOC_SUBTRACTOR */ + 4, /* X86_64_RELOC_SIGNED_1 */ + 4, /* X86_64_RELOC_SIGNED_2 */ + 4, /* X86_64_RELOC_SIGNED_4 */ +}; + +/** Macro for getting the size of a AMD64 Mach-O relocation. */ +#define MACHO_AMD64_RELOC_SIZE(a_Type) ( (a_Type) < RT_ELEMENTS(g_acbMachOAmd64RelTypes) ? g_acbMachOAmd64RelTypes[(a_Type)] : 1) + + +typedef struct MACHODETAILS +{ + /** The ELF header. */ + Elf64_Ehdr const *pEhdr; + /** The section header table. */ + Elf64_Shdr const *paShdrs; + /** The string table for the section names. */ + const char *pchShStrTab; + + /** The symbol table section number. UINT16_MAX if not found. */ + uint16_t iSymSh; + /** The string table section number. UINT16_MAX if not found. */ + uint16_t iStrSh; + + /** The symbol table. */ + Elf64_Sym const *paSymbols; + /** The number of symbols in the symbol table. */ + uint32_t cSymbols; + + /** Pointer to the (symbol) string table if found. */ + const char *pchStrTab; + /** The string table size. */ + size_t cbStrTab; + +} MACHODETAILS; +typedef MACHODETAILS *PMACHODETAILS; +typedef MACHODETAILS const *PCMACHODETAILS; + + +static bool validateMacho(const char *pszFile, uint8_t const *pbFile, size_t cbFile, PMACHODETAILS pMachOStuff) +{ + /* + * Initialize the Mach-O details structure. + */ + memset(pMachOStuff, 0, sizeof(*pMachOStuff)); + pMachOStuff->iSymSh = UINT16_MAX; + pMachOStuff->iStrSh = UINT16_MAX; + + /* + * Validate the header and our other expectations. + */ + Elf64_Ehdr const *pEhdr = (Elf64_Ehdr const *)pbFile; + pMachOStuff->pEhdr = pEhdr; + if ( pEhdr->e_ident[EI_CLASS] != ELFCLASS64 + || pEhdr->e_ident[EI_DATA] != ELFDATA2LSB + || pEhdr->e_ehsize != sizeof(Elf64_Ehdr) + || pEhdr->e_shentsize != sizeof(Elf64_Shdr) + || pEhdr->e_version != EV_CURRENT ) + return error(pszFile, "Unsupported ELF config\n"); + if (pEhdr->e_type != ET_REL) + return error(pszFile, "Expected relocatable ELF file (e_type=%d)\n", pEhdr->e_type); + if (pEhdr->e_machine != EM_X86_64) + return error(pszFile, "Expected relocatable ELF file (e_type=%d)\n", pEhdr->e_machine); + if (pEhdr->e_phnum != 0) + return error(pszFile, "Expected e_phnum to be zero not %u\n", pEhdr->e_phnum); + if (pEhdr->e_shnum < 2) + return error(pszFile, "Expected e_shnum to be two or higher\n"); + if (pEhdr->e_shstrndx >= pEhdr->e_shnum || pEhdr->e_shstrndx == 0) + return error(pszFile, "Bad e_shstrndx=%u (e_shnum=%u)\n", pEhdr->e_shstrndx, pEhdr->e_shnum); + if ( pEhdr->e_shoff >= cbFile + || pEhdr->e_shoff + pEhdr->e_shnum * sizeof(Elf64_Shdr) > cbFile) + return error(pszFile, "Section table is outside the file (e_shoff=%#llx, e_shnum=%u, cbFile=%#llx)\n", + pEhdr->e_shstrndx, pEhdr->e_shnum, (uint64_t)cbFile); + + /* + * Locate the section name string table. + * We assume it's okay as we only reference it in verbose mode. + */ + Elf64_Shdr const *paShdrs = (Elf64_Shdr const *)&pbFile[pEhdr->e_shoff]; + pMachOStuff->paShdrs = paShdrs; + + Elf64_Xword const cbShStrTab = paShdrs[pEhdr->e_shstrndx].sh_size; + if ( paShdrs[pEhdr->e_shstrndx].sh_offset > cbFile + || cbShStrTab > cbFile + || paShdrs[pEhdr->e_shstrndx].sh_offset + cbShStrTab > cbFile) + return error(pszFile, + "Section string table is outside the file (sh_offset=%#" ELF_FMT_X64 " sh_size=%#" ELF_FMT_X64 " cbFile=%#" ELF_FMT_X64 ")\n", + paShdrs[pEhdr->e_shstrndx].sh_offset, paShdrs[pEhdr->e_shstrndx].sh_size, (Elf64_Xword)cbFile); + const char *pchShStrTab = (const char *)&pbFile[paShdrs[pEhdr->e_shstrndx].sh_offset]; + pMachOStuff->pchShStrTab = pchShStrTab; + + /* + * Work the section table. + */ + bool fRet = true; + for (uint32_t i = 1; i < pEhdr->e_shnum; i++) + { + if (paShdrs[i].sh_name >= cbShStrTab) + return error(pszFile, "Invalid sh_name value (%#x) for section #%u\n", paShdrs[i].sh_name, i); + const char *pszShNm = &pchShStrTab[paShdrs[i].sh_name]; + + if ( paShdrs[i].sh_offset > cbFile + || paShdrs[i].sh_size > cbFile + || paShdrs[i].sh_offset + paShdrs[i].sh_size > cbFile) + return error(pszFile, "Section #%u '%s' has data outside the file: %#" ELF_FMT_X64 " LB %#" ELF_FMT_X64 " (cbFile=%#" ELF_FMT_X64 ")\n", + i, pszShNm, paShdrs[i].sh_offset, paShdrs[i].sh_size, (Elf64_Xword)cbFile); + if (g_cVerbose) + printf("shdr[%u]: name=%#x '%s' type=%#x flags=%#" ELF_FMT_X64 " addr=%#" ELF_FMT_X64 " off=%#" ELF_FMT_X64 " size=%#" ELF_FMT_X64 "\n" + " link=%u info=%#x align=%#" ELF_FMT_X64 " entsize=%#" ELF_FMT_X64 "\n", + i, paShdrs[i].sh_name, pszShNm, paShdrs[i].sh_type, paShdrs[i].sh_flags, + paShdrs[i].sh_addr, paShdrs[i].sh_offset, paShdrs[i].sh_size, + paShdrs[i].sh_link, paShdrs[i].sh_info, paShdrs[i].sh_addralign, paShdrs[i].sh_entsize); + + if (paShdrs[i].sh_link >= pEhdr->e_shnum) + return error(pszFile, "Section #%u '%s' links to a section outside the section table: %#x, max %#x\n", + i, pszShNm, paShdrs[i].sh_link, pEhdr->e_shnum); + if (!RT_IS_POWER_OF_TWO(paShdrs[i].sh_addralign)) + return error(pszFile, "Section #%u '%s' alignment value is not a power of two: %#" ELF_FMT_X64 "\n", + i, pszShNm, paShdrs[i].sh_addralign); + if (!RT_IS_POWER_OF_TWO(paShdrs[i].sh_addralign)) + return error(pszFile, "Section #%u '%s' alignment value is not a power of two: %#" ELF_FMT_X64 "\n", + i, pszShNm, paShdrs[i].sh_addralign); + if (paShdrs[i].sh_addr != 0) + return error(pszFile, "Section #%u '%s' has non-zero address: %#" ELF_FMT_X64 "\n", i, pszShNm, paShdrs[i].sh_addr); + + if (paShdrs[i].sh_type == SHT_RELA) + { + if (paShdrs[i].sh_entsize != sizeof(Elf64_Rela)) + return error(pszFile, "Expected sh_entsize to be %u not %u for section #%u (%s)\n", (unsigned)sizeof(Elf64_Rela), + paShdrs[i].sh_entsize, i, pszShNm); + uint32_t const cRelocs = paShdrs[i].sh_size / sizeof(Elf64_Rela); + if (cRelocs * sizeof(Elf64_Rela) != paShdrs[i].sh_size) + return error(pszFile, "Uneven relocation entry count in #%u (%s): sh_size=%#" ELF_FMT_X64 "\n", + i, pszShNm, paShdrs[i].sh_size); + if ( paShdrs[i].sh_offset > cbFile + || paShdrs[i].sh_size >= cbFile + || paShdrs[i].sh_offset + paShdrs[i].sh_size > cbFile) + return error(pszFile, "The content of section #%u '%s' is outside the file (%#" ELF_FMT_X64 " LB %#" ELF_FMT_X64 ", cbFile=%#lx)\n", + i, pszShNm, paShdrs[i].sh_offset, paShdrs[i].sh_size, (unsigned long)cbFile); + if (paShdrs[i].sh_info != i - 1) + return error(pszFile, "Expected relocation section #%u (%s) to link to previous section: sh_info=%#u\n", + i, pszShNm, (unsigned)paShdrs[i].sh_link); + if (paShdrs[paShdrs[i].sh_link].sh_type != SHT_SYMTAB) + return error(pszFile, "Expected relocation section #%u (%s) to link to symbol table: sh_link=%#u -> sh_type=%#x\n", + i, pszShNm, (unsigned)paShdrs[i].sh_link, (unsigned)paShdrs[paShdrs[i].sh_link].sh_type); + uint32_t cSymbols = paShdrs[paShdrs[i].sh_link].sh_size / paShdrs[paShdrs[i].sh_link].sh_entsize; + + Elf64_Rela const *paRelocs = (Elf64_Rela *)&pbFile[paShdrs[i].sh_offset]; + for (uint32_t j = 0; j < cRelocs; j++) + { + uint8_t const bType = ELF64_R_TYPE(paRelocs[j].r_info); + if (RT_UNLIKELY(bType >= R_X86_64_COUNT)) + fRet = error(pszFile, + "%#018" ELF_FMT_X64 " %#018" ELF_FMT_X64 ": unknown fix up %#x (%+" ELF_FMT_D64 ")\n", + paRelocs[j].r_offset, paRelocs[j].r_info, bType, paRelocs[j].r_addend); + if (RT_UNLIKELY( j > 1 + && paRelocs[j].r_offset <= paRelocs[j - 1].r_offset + && paRelocs[j].r_offset + ELF_AMD64_RELOC_SIZE(ELF64_R_TYPE(paRelocs[j].r_info)) + < paRelocs[j - 1].r_offset )) + fRet = error(pszFile, + "%#018" ELF_FMT_X64 " %#018" ELF_FMT_X64 ": out of offset order (prev %" ELF_FMT_X64 ")\n", + paRelocs[j].r_offset, paRelocs[j].r_info, paRelocs[j - 1].r_offset); + uint32_t const iSymbol = ELF64_R_SYM(paRelocs[j].r_info); + if (RT_UNLIKELY(iSymbol >= cSymbols)) + fRet = error(pszFile, + "%#018" ELF_FMT_X64 " %#018" ELF_FMT_X64 ": symbol index (%#x) out of bounds (%#x)\n", + paRelocs[j].r_offset, paRelocs[j].r_info, iSymbol, cSymbols); + } + if (RT_UNLIKELY( cRelocs > 0 + && fRet + && ( paRelocs[cRelocs - 1].r_offset > paShdrs[i - 1].sh_size + || paRelocs[cRelocs - 1].r_offset + ELF_AMD64_RELOC_SIZE(ELF64_R_TYPE(paRelocs[cRelocs-1].r_info)) + > paShdrs[i - 1].sh_size ))) + fRet = error(pszFile, + "%#018" ELF_FMT_X64 " %#018" ELF_FMT_X64 ": out of bounds (sh_size %" ELF_FMT_X64 ")\n", + paRelocs[cRelocs - 1].r_offset, paRelocs[cRelocs - 1].r_info, paShdrs[i - 1].sh_size); + + } + else if (paShdrs[i].sh_type == SHT_REL) + fRet = error(pszFile, "Section #%u '%s': Unexpected SHT_REL section\n", i, pszShNm); + else if (paShdrs[i].sh_type == SHT_SYMTAB) + { + if (paShdrs[i].sh_entsize != sizeof(Elf64_Sym)) + fRet = error(pszFile, "Section #%u '%s': Unsupported symbol table entry size in : #%u (expected #%u)\n", + i, pszShNm, paShdrs[i].sh_entsize, sizeof(Elf64_Sym)); + Elf64_Xword const cSymbols = paShdrs[i].sh_size / paShdrs[i].sh_entsize; + if (cSymbols * paShdrs[i].sh_entsize != paShdrs[i].sh_size) + fRet = error(pszFile, "Section #%u '%s': Size not a multiple of entry size: %#" ELF_FMT_X64 " %% %#" ELF_FMT_X64 " = %#" ELF_FMT_X64 "\n", + i, pszShNm, paShdrs[i].sh_size, paShdrs[i].sh_entsize, paShdrs[i].sh_size % paShdrs[i].sh_entsize); + if (cSymbols > UINT32_MAX) + fRet = error(pszFile, "Section #%u '%s': too many symbols: %" ELF_FMT_X64 "\n", + i, pszShNm, paShdrs[i].sh_size, cSymbols); + + if (pMachOStuff->iSymSh == UINT16_MAX) + { + pMachOStuff->iSymSh = (uint16_t)i; + pMachOStuff->paSymbols = (Elf64_Sym const *)&pbFile[paShdrs[i].sh_offset]; + pMachOStuff->cSymbols = cSymbols; + + if (paShdrs[i].sh_link != 0) + { + /* Note! The symbol string table section header may not have been validated yet! */ + Elf64_Shdr const *pStrTabShdr = &paShdrs[paShdrs[i].sh_link]; + pMachOStuff->iStrSh = paShdrs[i].sh_link; + pMachOStuff->pchStrTab = (const char *)&pbFile[pStrTabShdr->sh_offset]; + pMachOStuff->cbStrTab = (size_t)pStrTabShdr->sh_size; + } + else + fRet = error(pszFile, "Section #%u '%s': String table link is out of bounds (%#x)\n", + i, pszShNm, paShdrs[i].sh_link); + } + else + fRet = error(pszFile, "Section #%u '%s': Found additonal symbol table, previous in #%u\n", + i, pszShNm, pMachOStuff->iSymSh); + } + } + return fRet; +} + +static bool convertMachoSectionsToSegDefsAndGrpDefs(POMFWRITER pThis, PCMACHODETAILS pMachOStuff) +{ + /* + * Do the list of names pass. + */ + uint16_t idxGrpFlat, idxGrpData; + uint16_t idxClassCode, idxClassData, idxClassDwarf; + if ( !omfWriter_LNamesBegin(pThis, true /*fAddZeroEntry*/) + || !omfWriter_LNamesAddN(pThis, RT_STR_TUPLE("FLAT"), &idxGrpFlat) + || !omfWriter_LNamesAddN(pThis, RT_STR_TUPLE("BS3DATA64_GROUP"), &idxGrpData) + || !omfWriter_LNamesAddN(pThis, RT_STR_TUPLE("BS3CLASS64CODE"), &idxClassCode) + || !omfWriter_LNamesAddN(pThis, RT_STR_TUPLE("FAR_DATA"), &idxClassData) + || !omfWriter_LNamesAddN(pThis, RT_STR_TUPLE("DWARF"), &idxClassDwarf) + ) + return false; + + bool fHaveData = false; + Elf64_Shdr const *pShdr = &pMachOStuff->paShdrs[1]; + Elf64_Half const cSections = pMachOStuff->pEhdr->e_shnum; + for (Elf64_Half i = 1; i < cSections; i++, pShdr++) + { + const char *pszName = &pMachOStuff->pchShStrTab[pShdr->sh_name]; + if (*pszName == '\0') + return error(pThis->pszSrc, "Section #%u has an empty name!\n", i); + + switch (pShdr->sh_type) + { + case SHT_PROGBITS: + case SHT_NOBITS: + /* We drop a few sections we don't want:. */ + if ( strcmp(pszName, ".comment") != 0 /* compiler info */ + && strcmp(pszName, ".note.GNU-stack") != 0 /* some empty section for hinting the linker/whatever */ + && strcmp(pszName, ".eh_frame") != 0 /* unwind / exception info */ + ) + { + pThis->paSegments[i].iSegDef = UINT16_MAX; + pThis->paSegments[i].iGrpDef = UINT16_MAX; + + /* Translate the name and determine group and class. + Note! We currently strip sub-sections. */ + if ( strcmp(pszName, ".text") == 0 + || strncmp(pszName, RT_STR_TUPLE(".text.")) == 0) + { + pszName = "BS3TEXT64"; + pThis->paSegments[i].iGrpNm = idxGrpFlat; + pThis->paSegments[i].iClassNm = idxClassCode; + } + else if ( strcmp(pszName, ".data") == 0 + || strncmp(pszName, RT_STR_TUPLE(".data.")) == 0) + { + pszName = "BS3DATA64"; + pThis->paSegments[i].iGrpNm = idxGrpData; + pThis->paSegments[i].iClassNm = idxClassData; + } + else if (strcmp(pszName, ".bss") == 0) + { + pszName = "BS3BSS64"; + pThis->paSegments[i].iGrpNm = idxGrpData; + pThis->paSegments[i].iClassNm = idxClassData; + } + else if ( strcmp(pszName, ".rodata") == 0 + || strncmp(pszName, RT_STR_TUPLE(".rodata.")) == 0) + { + pszName = "BS3DATA64CONST"; + pThis->paSegments[i].iGrpNm = idxGrpData; + pThis->paSegments[i].iClassNm = idxClassData; + } + else if (strncmp(pszName, RT_STR_TUPLE(".debug_")) == 0) + { + pThis->paSegments[i].iGrpNm = UINT16_MAX; + pThis->paSegments[i].iClassNm = idxClassDwarf; + } + else + { + pThis->paSegments[i].iGrpNm = idxGrpData; + pThis->paSegments[i].iClassNm = idxClassData; + error(pThis->pszSrc, "Unknown data (?) segment: '%s'\n", pszName); + } + + /* Save the name. */ + pThis->paSegments[i].pszName = strdup(pszName); + if (!pThis->paSegments[i].pszName) + return error(pThis->pszSrc, "Out of memory!\n"); + + /* Add the section name. */ + if (!omfWriter_LNamesAdd(pThis, pThis->paSegments[i].pszName, &pThis->paSegments[i].iSegNm)) + return false; + + fHaveData |= pThis->paSegments[i].iGrpDef == idxGrpData; + break; + } + RT_FALL_THRU(); + + default: + pThis->paSegments[i].iSegDef = UINT16_MAX; + pThis->paSegments[i].iGrpDef = UINT16_MAX; + pThis->paSegments[i].iSegNm = UINT16_MAX; + pThis->paSegments[i].iGrpNm = UINT16_MAX; + pThis->paSegments[i].iClassNm = UINT16_MAX; + pThis->paSegments[i].pszName = NULL; + break; + } + } + + if (!omfWriter_LNamesEnd(pThis)) + return false; + + /* + * Emit segment definitions. + */ + uint16_t iSegDef = 1; /* Start counting at 1. */ + pShdr = &pMachOStuff->paShdrs[1]; + for (Elf64_Half i = 1; i < cSections; i++, pShdr++) + { + if (pThis->paSegments[i].iSegNm == UINT16_MAX) + continue; + + uint8_t bSegAttr = 0; + + /* The A field. */ + switch (pShdr->sh_addralign) + { + case 0: + case 1: + bSegAttr |= 1 << 5; + break; + case 2: + bSegAttr |= 2 << 5; + break; + case 4: + bSegAttr |= 5 << 5; + break; + case 8: + case 16: + bSegAttr |= 3 << 5; + break; + case 32: + case 64: + case 128: + case 256: + bSegAttr |= 4 << 5; + break; + default: + bSegAttr |= 6 << 5; /* page aligned, pharlabs extension. */ + break; + } + + /* The C field. */ + bSegAttr |= 2 << 2; /* public */ + + /* The B field. We don't have 4GB segments, so leave it as zero. */ + + /* The D field shall be set as we're doing USE32. */ + bSegAttr |= 1; + + + /* Done. */ + if (!omfWriter_SegDef(pThis, bSegAttr, (uint32_t)pShdr->sh_size, + pThis->paSegments[i].iSegNm, + pThis->paSegments[i].iClassNm)) + return false; + pThis->paSegments[i].iSegDef = iSegDef++; + } + + /* + * Flat group definition (#1) - special, no members. + */ + uint16_t iGrpDef = 1; + if ( !omfWriter_GrpDefBegin(pThis, idxGrpFlat) + || !omfWriter_GrpDefEnd(pThis)) + return false; + for (uint16_t i = 0; i < cSections; i++) + if (pThis->paSegments[i].iGrpNm == idxGrpFlat) + pThis->paSegments[i].iGrpDef = iGrpDef; + pThis->idxGrpFlat = iGrpDef++; + + /* + * Data group definition (#2). + */ + /** @todo do we need to consider missing segments and ordering? */ + uint16_t cGrpNms = 0; + uint16_t aiGrpNms[2] = { 0, 0 }; /* Shut up, GCC. */ + if (fHaveData) + aiGrpNms[cGrpNms++] = idxGrpData; + for (uint32_t iGrpNm = 0; iGrpNm < cGrpNms; iGrpNm++) + { + if (!omfWriter_GrpDefBegin(pThis, aiGrpNms[iGrpNm])) + return false; + for (uint16_t i = 0; i < cSections; i++) + if (pThis->paSegments[i].iGrpNm == aiGrpNms[iGrpNm]) + { + pThis->paSegments[i].iGrpDef = iGrpDef; + if (!omfWriter_GrpDefAddSegDef(pThis, pThis->paSegments[i].iSegDef)) + return false; + } + if (!omfWriter_GrpDefEnd(pThis)) + return false; + iGrpDef++; + } + + return true; +} + +static bool convertMachOSymbolsToPubDefsAndExtDefs(POMFWRITER pThis, PCMACHODETAILS pMachOStuff) +{ + if (!pMachOStuff->cSymbols) + return true; + + /* + * Process the symbols the first. + */ + uint32_t cAbsSyms = 0; + uint32_t cExtSyms = 0; + uint32_t cPubSyms = 0; + for (uint32_t iSeg = 0; iSeg < pThis->cSegments; iSeg++) + pThis->paSegments[iSeg].cPubDefs = 0; + + uint32_t const cSections = pMachOStuff->pEhdr->e_shnum; + uint32_t const cSymbols = pMachOStuff->cSymbols; + Elf64_Sym const * const paSymbols = pMachOStuff->paSymbols; + for (uint32_t iSym = 0; iSym < cSymbols; iSym++) + { + const uint8_t bBind = ELF64_ST_BIND(paSymbols[iSym].st_info); + const uint8_t bType = ELF64_ST_TYPE(paSymbols[iSym].st_info); + const char *pszSymName = &pMachOStuff->pchStrTab[paSymbols[iSym].st_name]; + if ( *pszSymName == '\0' + && bType == STT_SECTION + && paSymbols[iSym].st_shndx < cSections) + pszSymName = &pMachOStuff->pchShStrTab[pMachOStuff->paShdrs[paSymbols[iSym].st_shndx].sh_name]; + + pThis->paSymbols[iSym].enmType = OMFSYMTYPE_IGNORED; + pThis->paSymbols[iSym].idx = UINT16_MAX; + pThis->paSymbols[iSym].idxSegDef = UINT16_MAX; + pThis->paSymbols[iSym].idxGrpDef = UINT16_MAX; + + uint32_t const idxSection = paSymbols[iSym].st_shndx; + if (idxSection == SHN_UNDEF) + { + if (bBind == STB_GLOBAL) + { + pThis->paSymbols[iSym].enmType = OMFSYMTYPE_EXTDEF; + cExtSyms++; + if (*pszSymName == '\0') + return error(pThis->pszSrc, "External symbol #%u (%s) has an empty name.\n", iSym, pszSymName); + } + else if (bBind != STB_LOCAL || iSym != 0) /* Entry zero is usually a dummy. */ + return error(pThis->pszSrc, "Unsupported or invalid bind type %#x for undefined symbol #%u (%s)\n", + bBind, iSym, pszSymName); + } + else if (idxSection < cSections) + { + pThis->paSymbols[iSym].idxSegDef = pThis->paSegments[idxSection].iSegDef; + pThis->paSymbols[iSym].idxGrpDef = pThis->paSegments[idxSection].iGrpDef; + if (bBind == STB_GLOBAL) + { + pThis->paSymbols[iSym].enmType = OMFSYMTYPE_PUBDEF; + pThis->paSegments[idxSection].cPubDefs++; + cPubSyms++; + if (bType == STT_SECTION) + return error(pThis->pszSrc, "Don't know how to export STT_SECTION symbol #%u (%s)\n", iSym, pszSymName); + if (*pszSymName == '\0') + return error(pThis->pszSrc, "Public symbol #%u (%s) has an empty name.\n", iSym, pszSymName); + } + else if (bType == STT_SECTION) + pThis->paSymbols[iSym].enmType = OMFSYMTYPE_SEGDEF; + else + pThis->paSymbols[iSym].enmType = OMFSYMTYPE_INTERNAL; + } + else if (idxSection == SHN_ABS) + { + if (bType != STT_FILE) + { + if (bBind == STB_GLOBAL) + { + pThis->paSymbols[iSym].enmType = OMFSYMTYPE_PUBDEF; + pThis->paSymbols[iSym].idxSegDef = 0; + pThis->paSymbols[iSym].idxGrpDef = 0; + cAbsSyms++; + if (*pszSymName == '\0') + return error(pThis->pszSrc, "Public absolute symbol #%u (%s) has an empty name.\n", iSym, pszSymName); + } + else + return error(pThis->pszSrc, "Unsupported or invalid bind type %#x for absolute symbol #%u (%s)\n", + bBind, iSym, pszSymName); + } + } + else + return error(pThis->pszSrc, "Unsupported or invalid section number %#x for symbol #%u (%s)\n", + idxSection, iSym, pszSymName); + } + + /* + * Emit the PUBDEFs the first time around (see order of records in TIS spec). + * Note! We expect the os x compiler to always underscore symbols, so unlike the + * other 64-bit converters we don't need to check for underscores and add them. + */ + uint16_t idxPubDef = 1; + if (cPubSyms) + { + for (uint32_t iSeg = 0; iSeg < pThis->cSegments; iSeg++) + if (pThis->paSegments[iSeg].cPubDefs > 0) + { + uint16_t const idxSegDef = pThis->paSegments[iSeg].iSegDef; + if (!omfWriter_PubDefBegin(pThis, pThis->paSegments[iSeg].iGrpDef, idxSegDef)) + return false; + for (uint16_t iSym = 0; iSym < cSymbols; iSym++) + if ( pThis->paSymbols[iSym].idxSegDef == idxSegDef + && pThis->paSymbols[iSym].enmType == OMFSYMTYPE_PUBDEF) + { + const char *pszName = &pMachOStuff->pchStrTab[paSymbols[iSym].st_name]; + if (!omfWriter_PubDefAdd(pThis, paSymbols[iSym].st_value, pszName, false /*fPrependUnderscore*/)) + return false; + pThis->paSymbols[iSym].idx = idxPubDef++; + } + if (!omfWriter_PubDefEnd(pThis)) + return false; + } + } + + if (cAbsSyms > 0) + { + if (!omfWriter_PubDefBegin(pThis, 0, 0)) + return false; + for (uint16_t iSym = 0; iSym < cSymbols; iSym++) + if ( pThis->paSymbols[iSym].idxSegDef == 0 + && pThis->paSymbols[iSym].enmType == OMFSYMTYPE_PUBDEF) + { + const char *pszName = &pMachOStuff->pchStrTab[paSymbols[iSym].st_name]; + if (!omfWriter_PubDefAdd(pThis, paSymbols[iSym].st_value, pszName, false /*fPrependUnderscore*/)) + return false; + pThis->paSymbols[iSym].idx = idxPubDef++; + } + if (!omfWriter_PubDefEnd(pThis)) + return false; + } + + /* + * Go over the symbol table and emit external definition records. + */ + if (!omfWriter_ExtDefBegin(pThis)) + return false; + uint16_t idxExtDef = 1; + for (uint16_t iSym = 0; iSym < cSymbols; iSym++) + if (pThis->paSymbols[iSym].enmType == OMFSYMTYPE_EXTDEF) + { + const char *pszName = &pMachOStuff->pchStrTab[paSymbols[iSym].st_name]; + if (!omfWriter_ExtDefAdd(pThis, pszName, false /*fPrependUnderscore*/)) + return false; + pThis->paSymbols[iSym].idx = idxExtDef++; + } + + if (!omfWriter_ExtDefEnd(pThis)) + return false; + + return true; +} + +static bool convertMachOSectionsToLeDataAndFixupps(POMFWRITER pThis, PCMACHODETAILS pMachOStuff, + uint8_t const *pbFile, size_t cbFile) +{ + Elf64_Sym const *paSymbols = pMachOStuff->paSymbols; + Elf64_Shdr const *paShdrs = pMachOStuff->paShdrs; + bool fRet = true; + for (uint32_t i = 1; i < pThis->cSegments; i++) + { + if (pThis->paSegments[i].iSegDef == UINT16_MAX) + continue; + + const char *pszSegNm = &pMachOStuff->pchShStrTab[paShdrs[i].sh_name]; + bool const fRelocs = i + 1 < pThis->cSegments && paShdrs[i + 1].sh_type == SHT_RELA; + uint32_t cRelocs = fRelocs ? paShdrs[i + 1].sh_size / sizeof(Elf64_Rela) : 0; + Elf64_Rela const *paRelocs = fRelocs ? (Elf64_Rela *)&pbFile[paShdrs[i + 1].sh_offset] : NULL; + Elf64_Xword cbVirtData = paShdrs[i].sh_size; + Elf64_Xword cbData = paShdrs[i].sh_type == SHT_NOBITS ? 0 : cbVirtData; + uint8_t const *pbData = &pbFile[paShdrs[i].sh_offset]; + uint32_t off = 0; + + /* The OMF record size requires us to split larger sections up. To make + life simple, we fill zeros for unitialized (BSS) stuff. */ + const uint32_t cbMaxData = RT_MIN(OMF_MAX_RECORD_PAYLOAD - 1 - (pThis->paSegments[i].iSegDef >= 128) - 4 - 1, _1K); + while (cbVirtData > 0) + { + /* Figure out how many bytes to put out in this chunk. Must make sure + fixups doesn't cross chunk boundraries. ASSUMES sorted relocs. */ + uint32_t cChunkRelocs = cRelocs; + uint32_t cbChunk = cbVirtData; + uint32_t offEnd = off + cbChunk; + if (cbChunk > cbMaxData) + { + cbChunk = cbMaxData; + offEnd = off + cbChunk; + cChunkRelocs = 0; + + /* Quickly determin the reloc range. */ + while ( cChunkRelocs < cRelocs + && paRelocs[cChunkRelocs].r_offset < offEnd) + cChunkRelocs++; + + /* Ensure final reloc doesn't go beyond chunk. */ + while ( cChunkRelocs > 0 + && paRelocs[cChunkRelocs - 1].r_offset + + ELF_AMD64_RELOC_SIZE(ELF64_R_TYPE(paRelocs[cChunkRelocs - 1].r_info)) + > offEnd) + { + uint32_t cbDrop = offEnd - paRelocs[cChunkRelocs - 1].r_offset; + cbChunk -= cbDrop; + offEnd -= cbDrop; + cChunkRelocs--; + } + + if (!cbVirtData) + return error(pThis->pszSrc, "Wtf? cbVirtData is zero!\n"); + } + + /* + * We stash the bytes into the OMF writer record buffer, receiving a + * pointer to the start of it so we can make adjustments if necessary. + */ + uint8_t *pbCopy; + if (!omfWriter_LEDataBeginEx(pThis, pThis->paSegments[i].iSegDef, off, cbChunk, cbData, pbData, &pbCopy)) + return false; + + /* + * Convert fiuxps. + */ + for (uint32_t iReloc = 0; iReloc < cChunkRelocs; iReloc++) + { + /* Get the OMF and ELF data for the symbol the reloc references. */ + uint32_t const uType = ELF64_R_TYPE(paRelocs[iReloc].r_info); + uint32_t const iSymbol = ELF64_R_SYM(paRelocs[iReloc].r_info); + Elf64_Sym const * const pElfSym = &paSymbols[iSymbol]; + POMFSYMBOL const pOmfSym = &pThis->paSymbols[iSymbol]; + const char * const pszSymName = &pMachOStuff->pchStrTab[pElfSym->st_name]; + + /* Calc fixup location in the pending chunk and setup a flexible pointer to it. */ + uint16_t offDataRec = (uint16_t)(paRelocs[iReloc].r_offset - off); + RTPTRUNION uLoc; + uLoc.pu8 = &pbCopy[offDataRec]; + + /* OMF fixup data initialized with typical defaults. */ + bool fSelfRel = true; + uint8_t bLocation = OMF_FIX_LOC_32BIT_OFFSET; + uint8_t bFrame = OMF_FIX_F_GRPDEF; + uint16_t idxFrame = pThis->idxGrpFlat; + uint8_t bTarget; + uint16_t idxTarget; + bool fTargetDisp; + uint32_t offTargetDisp; + switch (pOmfSym->enmType) + { + case OMFSYMTYPE_INTERNAL: + case OMFSYMTYPE_PUBDEF: + bTarget = OMF_FIX_T_SEGDEF; + idxTarget = pOmfSym->idxSegDef; + fTargetDisp = true; + offTargetDisp = pElfSym->st_value; + break; + + case OMFSYMTYPE_SEGDEF: + bTarget = OMF_FIX_T_SEGDEF_NO_DISP; + idxTarget = pOmfSym->idxSegDef; + fTargetDisp = false; + offTargetDisp = 0; + break; + + case OMFSYMTYPE_EXTDEF: + bTarget = OMF_FIX_T_EXTDEF_NO_DISP; + idxTarget = pOmfSym->idx; + fTargetDisp = false; + offTargetDisp = 0; + break; + + default: + return error(pThis->pszSrc, "Relocation in segment #%u '%s' references ignored or invalid symbol (%s)\n", + i, pszSegNm, pszSymName); + } + + /* Do COFF relocation type conversion. */ + switch (uType) + { + case R_X86_64_64: + { + int64_t iAddend = paRelocs[iReloc].r_addend; + if (iAddend > _1G || iAddend < -_1G) + fRet = error(pThis->pszSrc, "R_X86_64_64 with large addend (%" ELF_FMT_D64 ") at %#x in segment #%u '%s'\n", + iAddend, paRelocs[iReloc].r_offset, i, pszSegNm); + *uLoc.pu64 = iAddend; + fSelfRel = false; + break; + } + + case R_X86_64_32: + case R_X86_64_32S: /* signed, unsigned, whatever. */ + fSelfRel = false; + RT_FALL_THRU(); + case R_X86_64_PC32: + { + /* defaults are ok, just handle the addend. */ + int32_t iAddend = paRelocs[iReloc].r_addend; + if (iAddend != paRelocs[iReloc].r_addend) + fRet = error(pThis->pszSrc, "R_X86_64_PC32 with large addend (%d) at %#x in segment #%u '%s'\n", + iAddend, paRelocs[iReloc].r_offset, i, pszSegNm); + *uLoc.pu32 = iAddend; + break; + } + + case R_X86_64_NONE: + continue; /* Ignore this one */ + + case R_X86_64_GOT32: + case R_X86_64_PLT32: + case R_X86_64_COPY: + case R_X86_64_GLOB_DAT: + case R_X86_64_JMP_SLOT: + case R_X86_64_RELATIVE: + case R_X86_64_GOTPCREL: + case R_X86_64_16: + case R_X86_64_PC16: + case R_X86_64_8: + case R_X86_64_PC8: + case R_X86_64_DTPMOD64: + case R_X86_64_DTPOFF64: + case R_X86_64_TPOFF64: + case R_X86_64_TLSGD: + case R_X86_64_TLSLD: + case R_X86_64_DTPOFF32: + case R_X86_64_GOTTPOFF: + case R_X86_64_TPOFF32: + default: + return error(pThis->pszSrc, "Unsupported fixup type %#x (%s) at rva=%#x in section #%u '%s' against '%s'\n", + uType, g_apszElfAmd64RelTypes[uType], paRelocs[iReloc].r_offset, i, pszSegNm, pszSymName); + } + + /* Add the fixup. */ + if (idxFrame == UINT16_MAX) + error(pThis->pszSrc, "idxFrame=UINT16_MAX for %s type=%s\n", pszSymName, g_apszElfAmd64RelTypes[uType]); + fRet = omfWriter_LEDataAddFixup(pThis, offDataRec, fSelfRel, bLocation, bFrame, idxFrame, + bTarget, idxTarget, fTargetDisp, offTargetDisp) && fRet; + } + + /* + * Write the LEDATA and associated FIXUPPs. + */ + if (!omfWriter_LEDataEnd(pThis)) + return false; + + /* + * Advance. + */ + paRelocs += cChunkRelocs; + cRelocs -= cChunkRelocs; + if (cbData > cbChunk) + { + cbData -= cbChunk; + pbData += cbChunk; + } + else + cbData = 0; + off += cbChunk; + cbVirtData -= cbChunk; + } + } + + return fRet; +} + + +static bool convertMachoToOmf(const char *pszFile, uint8_t const *pbFile, size_t cbFile, FILE *pDst) +{ + /* + * Validate the source file a little. + */ + MACHODETAILS MachOStuff; + if (!validateMachO(pszFile, pbFile, cbFile, &MachOStuff)) + return false; + + /* + * Instantiate the OMF writer. + */ + POMFWRITER pThis = omfWriter_Create(pszFile, MachOStuff.pEhdr->e_shnum, MachOStuff.cSymbols, pDst); + if (!pThis) + return false; + + /* + * Write the OMF object file. + */ + if (omfWriter_BeginModule(pThis, pszFile)) + { + Elf64_Ehdr const *pEhdr = (Elf64_Ehdr const *)pbFile; + + if ( convertMachOSectionsToSegDefsAndGrpDefs(pThis, &MachOStuff) + && convertMachOSymbolsToPubDefsAndExtDefs(pThis, &MachOStuff) + && omfWriter_LinkPassSeparator(pThis) + && convertMachOSectionsToLeDataAndFixupps(pThis, &MachOStuff, pbFile, cbFile) + && omfWriter_EndModule(pThis) ) + { + + omfWriter_Destroy(pThis); + return true; + } + } + + omfWriter_Destroy(pThis); + return false; +} + +#endif /* !MACHO_TO_OMF_CONVERSION */ + + +/********************************************************************************************************************************* +* OMF Converter/Tweaker * +*********************************************************************************************************************************/ + +/** Watcom intrinsics we need to modify so we can mix 32-bit and 16-bit + * code, since the 16 and 32 bit compilers share several names. + * The names are length prefixed. + */ +static const char * const g_apszExtDefRenames[] = +{ + "\x05" "__I4D", + "\x05" "__I4M", + "\x05" "__I8D", + "\x06" "__I8DQ", + "\x07" "__I8DQE", + "\x06" "__I8DR", + "\x07" "__I8DRE", + "\x06" "__I8LS", + "\x05" "__I8M", + "\x06" "__I8ME", + "\x06" "__I8RS", + "\x05" "__PIA", + "\x05" "__PIS", + "\x05" "__PTC", + "\x05" "__PTS", + "\x05" "__U4D", + "\x05" "__U4M", + "\x05" "__U8D", + "\x06" "__U8DQ", + "\x07" "__U8DQE", + "\x06" "__U8DR", + "\x07" "__U8DRE", + "\x06" "__U8LS", + "\x05" "__U8M", + "\x06" "__U8ME", + "\x06" "__U8RS", +}; + +/** + * Segment definition. + */ +typedef struct OMFSEGDEF +{ + uint32_t cbSeg; + uint8_t bSegAttr; + uint16_t idxName; + uint16_t idxClass; + uint16_t idxOverlay; + uint8_t cchName; + uint8_t cchClass; + uint8_t cchOverlay; + const char *pchName; + const char *pchClass; + const char *pchOverlay; + bool fUse32; + bool f32bitRec; +} OMFSEGDEF; +typedef OMFSEGDEF *POMFSEGDEF; + +/** + * Group definition. + */ +typedef struct OMFGRPDEF +{ + const char *pchName; + uint16_t idxName; + uint8_t cchName; + uint16_t cSegDefs; + uint16_t *paidxSegDefs; +} OMFGRPDEF; +typedef OMFGRPDEF *POMFGRPDEF; + +/** + * Records line number information for a file in a segment (for CV8 debug info). + */ +typedef struct OMFFILELINES +{ + /** The source info offset. */ + uint32_t offSrcInfo; + /** Number of line/offset pairs. */ + uint32_t cPairs; + /** Number of pairs allocated. */ + uint32_t cPairsAlloc; + /** Table with line number and offset pairs, ordered by offset. */ + PRTCV8LINEPAIR paPairs; +} OMFFILEINES; +typedef OMFFILEINES *POMFFILEINES; + +/** + * Records line number information for a segment (for CV8 debug info). + */ +typedef struct OMFSEGLINES +{ + /** Number of files. */ + uint32_t cFiles; + /** Number of bytes we need. */ + uint32_t cb; + /** The segment index. */ + uint16_t idxSeg; + /** The group index for this segment. Initially OMF_REPLACE_GRP_XXX values, + * later convertOmfWriteDebugGrpDefs replaces them with actual values. */ + uint16_t idxGrp; + /** File table. */ + POMFFILEINES paFiles; +} OMFSEGLINES; +typedef OMFSEGLINES *POMFSEGLINES; + +/** @name OMF_REPLACE_GRP_XXX - Special OMFSEGLINES::idxGrp values. + * @{ */ +#define OMF_REPLACE_GRP_CGROUP16 UINT16_C(0xffe0) +#define OMF_REPLACE_GRP_RMCODE UINT16_C(0xffe1) +#define OMF_REPLACE_GRP_X0CODE UINT16_C(0xffe2) +#define OMF_REPLACE_GRP_X1CODE UINT16_C(0xffe3) +/** @} */ + + +/** + * OMF details allocation that needs to be freed when done. + */ +typedef struct OMFDETAILSALLOC +{ + /** Pointer to the next allocation. */ + struct OMFDETAILSALLOC *pNext; + /** The allocated bytes. */ + RT_FLEXIBLE_ARRAY_EXTENSION + uint8_t abData[RT_FLEXIBLE_ARRAY]; +} OMFDETAILSALLOC; +typedef OMFDETAILSALLOC *POMFDETAILSALLOC; + +/** + * OMF conversion details. + * + * Keeps information relevant to the conversion and CV8 debug info. + */ +typedef struct OMFDETAILS +{ + /** The input file name. */ + const char *pszFile; + + /** Set if it has line numbers. */ + bool fLineNumbers; + /** Set if we think this may be a 32-bit OMF file. */ + bool fProbably32bit; + /** Set if this module may need mangling. */ + bool fMayNeedMangling; + /** The LNAME index of '$$SYMBOLS' or UINT16_MAX it not found. */ + uint16_t iSymbolsNm; + /** The LNAME index of 'DEBSYM' or UINT16_MAX it not found. */ + uint16_t iDebSymNm; + /** The '$$SYMBOLS' segment index. */ + uint16_t iSymbolsSeg; + + /** Number of SEGDEFs records. */ + uint16_t cSegDefs; + /** Number of GRPDEFs records. */ + uint16_t cGrpDefs; + /** Number of listed names. */ + uint16_t cLNames; + + /** Segment defintions. */ + POMFSEGDEF paSegDefs; + /** Group defintions. */ + POMFGRPDEF paGrpDefs; + /** Name list. Points to the size repfix. */ + char **papchLNames; + + /** Code groups we need to keep an eye on for line number fixup purposes. */ + struct OMFLINEGROUPS + { + /** The name. */ + const char *pszName; + /** The primary class name. */ + const char *pszClass1; + /** The secondary class name. */ + const char *pszClass2; + /** The main segment name, NULL if not applicable (CGROUP16). */ + const char *pszSeg; + /** The name length. */ + uint8_t cchName; + /** The primary class name length. */ + uint8_t cchClass1; + /** The secondary class name length. */ + uint8_t cchClass2; + /** Whether this group is needed. */ + bool fNeeded; + /** The group index (UINT16_MAX if not found). */ + uint16_t idxGroup; + /** The group name. */ + uint16_t idxName; + /** The OMF_REPLACE_GRP_XXX value. */ + uint16_t idxReplaceGrp; + } aGroups[4]; + + /** CV8: Filename string table size. */ + uint32_t cbStrTab; + /** CV8: Filename string table allocation size (always multiple of dword, + * zero initialized). */ + uint32_t cbStrTabAlloc; + /** CV8: Filename String table. */ + char *pchStrTab; + /** CV8: Elements in the source info table. */ + uint16_t cSrcInfo; + /** CV8: Source info table. */ + PRTCV8SRCINFO paSrcInfo; + + /** Number of entries in the paSegLines table. */ + uint32_t cSegLines; + /** Segment line numbers, indexed by segment number. */ + POMFSEGLINES paSegLines; + + /** List of allocations that needs freeing. */ + POMFDETAILSALLOC pAllocHead; +} OMFDETAILS; +typedef OMFDETAILS *POMFDETAILS; +typedef OMFDETAILS const *PCOMFDETAILS; + + +/** Grows a table to a given size (a_cNewEntries). */ +#define OMF_GROW_TABLE_EX_RET_ERR(a_EntryType, a_paTable, a_cEntries, a_cNewEntries) \ + do\ + { \ + size_t cbOld = (a_cEntries) * sizeof(a_EntryType); \ + size_t cbNew = (a_cNewEntries) * sizeof(a_EntryType); \ + void *pvNew = realloc(a_paTable, cbNew); \ + if (pvNew) \ + { \ + memset((uint8_t *)pvNew + cbOld, 0, cbNew - cbOld); \ + (a_paTable) = (a_EntryType *)pvNew; \ + } \ + else return error("???", "Out of memory!\n"); \ + } while (0) + +/** Grows a table. */ +#define OMF_GROW_TABLE_RET_ERR(a_EntryType, a_paTable, a_cEntries, a_cEvery) \ + if ((a_cEntries) % (a_cEvery) != 0) { /* likely */ } \ + else do\ + { \ + size_t cbOld = (a_cEntries) * sizeof(a_EntryType); \ + size_t cbNew = cbOld + (a_cEvery) * sizeof(a_EntryType); \ + void *pvNew = realloc(a_paTable, cbNew); \ + if (pvNew) \ + { \ + memset((uint8_t *)pvNew + cbOld, 0, (a_cEvery) * sizeof(a_EntryType)); \ + (a_paTable) = (a_EntryType *)pvNew; \ + } \ + else return error("???", "Out of memory!\n"); \ + } while (0) + +#define OMF_EXPLODE_LNAME(a_pOmfStuff, a_idxName, a_pchName, a_cchName, a_Name) \ + do { \ + if ((a_idxName) < (a_pOmfStuff)->cLNames) \ + { \ + a_cchName = (uint8_t)*(a_pOmfStuff)->papchLNames[(a_idxName)]; \ + a_pchName = (a_pOmfStuff)->papchLNames[(a_idxName)] + 1; \ + } \ + else return error((a_pOmfStuff)->pszFile, "Invalid LNAME reference %#x in " #a_Name "!\n", a_idxName); \ + } while (0) + + +/** + * Allocates memory that will be freed when we're done converting. + * + * @returns Pointer tot he memory. + * @param pOmfStuff The OMF details data. + * @param cbNeeded The amount of memory required. + */ +static void *omfDetails_Alloc(POMFDETAILS pOmfStuff, size_t cbNeeded) +{ + POMFDETAILSALLOC pAlloc = (POMFDETAILSALLOC)malloc(RT_UOFFSETOF_DYN(OMFDETAILSALLOC, abData[cbNeeded])); + if (pAlloc) + { + pAlloc->pNext = pOmfStuff->pAllocHead; + pOmfStuff->pAllocHead = pAlloc; + return &pAlloc->abData[0]; + } + return NULL; +} + +/** + * Adds a line number to the CV8 debug info. + * + * @returns success indicator. + * @param pOmfStuff Where to collect CV8 debug info. + * @param cchSrcFile The length of the source file name. + * @param pchSrcFile The source file name, not terminated. + * @param poffFile Where to return the source file information table + * offset (for use in the line number tables). + */ +static bool collectOmfAddFile(POMFDETAILS pOmfStuff, uint8_t cchSrcFile, const char *pchSrcFile, uint32_t *poffFile) +{ + /* + * Do lookup first. + */ + uint32_t i = pOmfStuff->cSrcInfo; + while (i-- > 0) + { + const char *pszCur = &pOmfStuff->pchStrTab[pOmfStuff->paSrcInfo[i].offSourceName]; + if ( strncmp(pszCur, pchSrcFile, cchSrcFile) == 0 + && pszCur[cchSrcFile] == '\0') + { + *poffFile = i * sizeof(pOmfStuff->paSrcInfo[0]); + return true; + } + } + + /* + * Add it to the string table (dword aligned and zero padded). + */ + uint32_t offSrcTab = pOmfStuff->cbStrTab; + if (offSrcTab + cchSrcFile + 1 > pOmfStuff->cbStrTabAlloc) + { + uint32_t cbNew = (offSrcTab == 0) + offSrcTab + cchSrcFile + 1; + cbNew = RT_ALIGN(cbNew, 256); + void *pvNew = realloc(pOmfStuff->pchStrTab, cbNew); + if (!pvNew) + return error("???", "out of memory"); + pOmfStuff->pchStrTab = (char *)pvNew; + pOmfStuff->cbStrTabAlloc = cbNew; + memset(&pOmfStuff->pchStrTab[offSrcTab], 0, cbNew - offSrcTab); + + if (!offSrcTab) + offSrcTab++; + } + + memcpy(&pOmfStuff->pchStrTab[offSrcTab], pchSrcFile, cchSrcFile); + pOmfStuff->pchStrTab[offSrcTab + cchSrcFile] = '\0'; + pOmfStuff->cbStrTab = offSrcTab + cchSrcFile + 1; + + /* + * Add it to the filename info table. + */ + if ((pOmfStuff->cSrcInfo % 8) == 0) + { + void *pvNew = realloc(pOmfStuff->paSrcInfo, sizeof(pOmfStuff->paSrcInfo[0]) * (pOmfStuff->cSrcInfo + 8)); + if (!pvNew) + return error("???", "out of memory"); + pOmfStuff->paSrcInfo = (PRTCV8SRCINFO)pvNew; + } + + PRTCV8SRCINFO pSrcInfo = &pOmfStuff->paSrcInfo[pOmfStuff->cSrcInfo++]; + pSrcInfo->offSourceName = offSrcTab; + pSrcInfo->uDigestType = RTCV8SRCINFO_DIGEST_TYPE_MD5; + memset(&pSrcInfo->Digest, 0, sizeof(pSrcInfo->Digest)); + + *poffFile = (uint32_t)((uintptr_t)pSrcInfo - (uintptr_t)pOmfStuff->paSrcInfo); + return true; +} + + +/** + * Adds a line number to the CV8 debug info. + * + * @returns success indicator. + * @param pOmfStuff Where to collect CV8 debug info. + * @param idxSeg The segment index. + * @param off The segment offset. + * @param uLine The line number. + * @param offSrcInfo The source file info table offset. + */ +static bool collectOmfAddLine(POMFDETAILS pOmfStuff, uint16_t idxSeg, uint32_t off, uint16_t uLine, uint32_t offSrcInfo) +{ + /* + * Get/add the segment line structure. + */ + if (idxSeg >= pOmfStuff->cSegLines) + { + OMF_GROW_TABLE_EX_RET_ERR(OMFSEGLINES, pOmfStuff->paSegLines, pOmfStuff->cSegLines, idxSeg + 1); + for (uint32_t i = pOmfStuff->cSegLines; i <= idxSeg; i++) + { + pOmfStuff->paSegLines[i].idxSeg = i; + pOmfStuff->paSegLines[i].idxGrp = UINT16_MAX; + pOmfStuff->paSegLines[i].cb = sizeof(RTCV8LINESHDR); + } + pOmfStuff->cSegLines = idxSeg + 1; + } + POMFSEGLINES pSegLines = &pOmfStuff->paSegLines[idxSeg]; + + /* + * Get/add the file structure with the segment. + */ + POMFFILEINES pFileLines = NULL; + uint32_t i = pSegLines->cFiles; + while (i-- > 0) + if (pSegLines->paFiles[i].offSrcInfo == offSrcInfo) + { + pFileLines = &pSegLines->paFiles[i]; + break; + } + if (!pFileLines) + { + i = pSegLines->cFiles; + OMF_GROW_TABLE_RET_ERR(OMFFILEINES, pSegLines->paFiles, pSegLines->cFiles, 4); + pSegLines->cFiles = i + 1; + pSegLines->cb += sizeof(RTCV8LINESSRCMAP); + + pFileLines = &pSegLines->paFiles[i]; + pFileLines->offSrcInfo = offSrcInfo; + pFileLines->cPairs = 0; + pFileLines->cPairsAlloc = 0; + pFileLines->paPairs = NULL; + + /* + * Check for segment group requirements the first time a segment is used. + */ + if (i == 0) + { + if (idxSeg >= pOmfStuff->cSegDefs) + return error("???", "collectOmfAddLine: idxSeg=%#x is out of bounds (%#x)!\n", idxSeg, pOmfStuff->cSegDefs); + POMFSEGDEF pSegDef = &pOmfStuff->paSegDefs[idxSeg]; + unsigned j = RT_ELEMENTS(pOmfStuff->aGroups); + while (j-- > 0) + if ( ( pSegDef->cchClass == pOmfStuff->aGroups[j].cchClass1 + && memcmp(pSegDef->pchClass, pOmfStuff->aGroups[j].pszClass1, pSegDef->cchClass) == 0) + || ( pSegDef->cchClass == pOmfStuff->aGroups[j].cchClass2 + && memcmp(pSegDef->pchClass, pOmfStuff->aGroups[j].pszClass2, pSegDef->cchClass) == 0)) + { + pOmfStuff->aGroups[j].fNeeded = true; + pSegLines->idxGrp = pOmfStuff->aGroups[j].idxReplaceGrp; + break; + } + } + } + + /* + * Add the line number (sorted, duplicates removed). + */ + if (pFileLines->cPairs + 1 > pFileLines->cPairsAlloc) + { + void *pvNew = realloc(pFileLines->paPairs, (pFileLines->cPairsAlloc + 16) * sizeof(pFileLines->paPairs[0])); + if (!pvNew) + return error("???", "out of memory"); + pFileLines->paPairs = (PRTCV8LINEPAIR)pvNew; + pFileLines->cPairsAlloc += 16; + } + + i = pFileLines->cPairs; + while (i > 0 && ( off < pFileLines->paPairs[i - 1].offSection + || ( off == pFileLines->paPairs[i - 1].offSection + && uLine < pFileLines->paPairs[i - 1].uLineNumber)) ) + i--; + if ( i == pFileLines->cPairs + || off != pFileLines->paPairs[i].offSection + || uLine != pFileLines->paPairs[i].uLineNumber) + { + if (i < pFileLines->cPairs) + memmove(&pFileLines->paPairs[i + 1], &pFileLines->paPairs[i], + (pFileLines->cPairs - i) * sizeof(pFileLines->paPairs)); + pFileLines->paPairs[i].offSection = off; + pFileLines->paPairs[i].uLineNumber = uLine; + pFileLines->paPairs[i].fEndOfStatement = true; + pFileLines->cPairs++; + pSegLines->cb += sizeof(pFileLines->paPairs[0]); + } + + return true; +} + + +/** + * Parses OMF file gathering line numbers (for CV8 debug info) and checking out + * external defintions for mangling work (compiler instrinsics). + * + * @returns success indicator. + * @param pszFile The name of the OMF file. + * @param pbFile The file content. + * @param cbFile The size of the file content. + * @param pOmfStuff Where to collect CV8 debug info and anything else we + * find out about the OMF file. + */ +static bool collectOmfDetails(const char *pszFile, uint8_t const *pbFile, size_t cbFile, POMFDETAILS pOmfStuff) +{ + uint32_t cExtDefs = 0; + uint32_t cPubDefs = 0; + uint32_t off = 0; + uint8_t cchSrcFile = 0; + const char *pchSrcFile = NULL; + uint32_t offSrcInfo = UINT32_MAX; + + memset(pOmfStuff, 0, sizeof(*pOmfStuff)); + pOmfStuff->pszFile = pszFile; + pOmfStuff->iDebSymNm = UINT16_MAX; + pOmfStuff->iSymbolsNm = UINT16_MAX; + pOmfStuff->iSymbolsSeg = UINT16_MAX; + + /* Dummy entries. */ + OMF_GROW_TABLE_RET_ERR(char *, pOmfStuff->papchLNames, pOmfStuff->cLNames, 16); + pOmfStuff->papchLNames[0] = (char *)""; + pOmfStuff->cLNames = 1; + + OMF_GROW_TABLE_RET_ERR(OMFSEGDEF, pOmfStuff->paSegDefs, pOmfStuff->cSegDefs, 16); + pOmfStuff->cSegDefs = 1; + + OMF_GROW_TABLE_RET_ERR(OMFGRPDEF, pOmfStuff->paGrpDefs, pOmfStuff->cGrpDefs, 16); + pOmfStuff->cGrpDefs = 1; + + /* Groups we seek. */ +#define OMF_INIT_WANTED_GROUP(a_idx, a_szName, a_szClass1, a_szClass2, a_pszSeg, a_idxReplace) \ + pOmfStuff->aGroups[a_idx].pszName = a_szName; \ + pOmfStuff->aGroups[a_idx].cchName = sizeof(a_szName) - 1; \ + pOmfStuff->aGroups[a_idx].pszClass1 = a_szClass1; \ + pOmfStuff->aGroups[a_idx].cchClass1 = sizeof(a_szClass1) - 1; \ + pOmfStuff->aGroups[a_idx].pszClass2 = a_szClass2; \ + pOmfStuff->aGroups[a_idx].cchClass2 = sizeof(a_szClass2) - 1; \ + pOmfStuff->aGroups[a_idx].pszSeg = a_pszSeg; \ + pOmfStuff->aGroups[a_idx].fNeeded = false; \ + pOmfStuff->aGroups[a_idx].idxGroup = UINT16_MAX; \ + pOmfStuff->aGroups[a_idx].idxName = UINT16_MAX; \ + pOmfStuff->aGroups[a_idx].idxReplaceGrp = a_idxReplace + OMF_INIT_WANTED_GROUP(0, "CGROUP16", "BS3CLASS16CODE", "CODE", NULL, OMF_REPLACE_GRP_CGROUP16); + OMF_INIT_WANTED_GROUP(1, "BS3GROUPRMTEXT16", "BS3CLASS16RMCODE", "", "BS3RMTEXT16", OMF_REPLACE_GRP_RMCODE); + OMF_INIT_WANTED_GROUP(2, "BS3GROUPX0TEXT16", "BS3CLASS16X0CODE", "", "BS3X0TEXT16", OMF_REPLACE_GRP_X0CODE); + OMF_INIT_WANTED_GROUP(3, "BS3GROUPX1TEXT16", "BS3CLASS16X1CODE", "", "BS3X1TEXT16", OMF_REPLACE_GRP_X1CODE); + + /* + * Process the OMF records. + */ + while (off + 3 < cbFile) + { + uint8_t bRecType = pbFile[off]; + uint16_t cbRec = RT_MAKE_U16(pbFile[off + 1], pbFile[off + 2]); + if (g_cVerbose > 2) + printf( "%#07x: type=%#04x len=%#06x\n", off, bRecType, cbRec); + if (off + cbRec > cbFile) + return error(pszFile, "Invalid record length at %#x: %#x (cbFile=%#lx)\n", off, cbRec, (unsigned long)cbFile); + + uint32_t offRec = 0; + uint8_t const *pbRec = &pbFile[off + 3]; +#define OMF_CHECK_RET(a_cbReq, a_Name) /* Not taking the checksum into account, so we're good with 1 or 2 byte fields. */ \ + if (offRec + (a_cbReq) <= cbRec) {/*likely*/} \ + else return error(pszFile, "Malformed " #a_Name "! off=%#x offRec=%#x cbRec=%#x cbNeeded=%#x line=%d\n", \ + off, offRec, cbRec, (a_cbReq), __LINE__) +#define OMF_READ_IDX(a_idx, a_Name) \ + do { \ + OMF_CHECK_RET(2, a_Name); \ + a_idx = pbRec[offRec++]; \ + if ((a_idx) & 0x80) \ + a_idx = (((a_idx) & 0x7f) << 8) | pbRec[offRec++]; \ + } while (0) + +#define OMF_READ_U16(a_u16, a_Name) \ + do { \ + OMF_CHECK_RET(4, a_Name); \ + a_u16 = RT_MAKE_U16(pbRec[offRec], pbRec[offRec + 1]); \ + offRec += 2; \ + } while (0) +#define OMF_READ_U32(a_u32, a_Name) \ + do { \ + OMF_CHECK_RET(4, a_Name); \ + a_u32 = RT_MAKE_U32_FROM_U8(pbRec[offRec], pbRec[offRec + 1], pbRec[offRec + 2], pbRec[offRec + 3]); \ + offRec += 4; \ + } while (0) + + switch (bRecType) + { + /* + * Record LNAME records, scanning for FLAT. + */ + case OMF_LNAMES: + while (offRec + 1 < cbRec) + { + uint8_t cch = pbRec[offRec]; + if (offRec + 1 + cch >= cbRec) + return error(pszFile, "Invalid LNAME string length at %#x+3+%#x: %#x (cbFile=%#lx)\n", + off, offRec, cch, (unsigned long)cbFile); + + if (g_cVerbose > 2) + printf(" LNAME[%u]: %-*.*s\n", pOmfStuff->cLNames, cch, cch, &pbRec[offRec + 1]); + + OMF_GROW_TABLE_RET_ERR(char *, pOmfStuff->papchLNames, pOmfStuff->cLNames, 16); + pOmfStuff->papchLNames[pOmfStuff->cLNames] = (char *)&pbRec[offRec]; + + if (IS_OMF_STR_EQUAL_EX(cch, &pbRec[offRec + 1], "FLAT")) + pOmfStuff->fProbably32bit = true; + + if (IS_OMF_STR_EQUAL_EX(cch, &pbRec[offRec + 1], "DEBSYM")) + pOmfStuff->iDebSymNm = pOmfStuff->cLNames; + if (IS_OMF_STR_EQUAL_EX(cch, &pbRec[offRec + 1], "$$SYMBOLS")) + pOmfStuff->iSymbolsNm = pOmfStuff->cLNames; + + unsigned j = RT_ELEMENTS(pOmfStuff->aGroups); + while (j-- > 0) + if ( cch == pOmfStuff->aGroups[j].cchName + && memcmp(&pbRec[offRec + 1], pOmfStuff->aGroups[j].pszName, pOmfStuff->aGroups[j].cchName) == 0) + { + pOmfStuff->aGroups[j].idxName = pOmfStuff->cLNames; + break; + } + + pOmfStuff->cLNames++; + offRec += cch + 1; + } + break; + + /* + * Display external definitions if -v is specified, also check if anything needs mangling. + */ + case OMF_EXTDEF: + while (offRec + 1 < cbRec) + { + uint8_t cch = pbRec[offRec++]; + OMF_CHECK_RET(cch, EXTDEF); + char *pchName = (char *)&pbRec[offRec]; + offRec += cch; + + uint16_t idxType; + OMF_READ_IDX(idxType, EXTDEF); + + if (g_cVerbose > 2) + printf(" EXTDEF [%u]: %-*.*s type=%#x\n", cExtDefs, cch, cch, pchName, idxType); + else if (g_cVerbose > 0) + printf(" U %-*.*s\n", cch, cch, pchName); + + /* Look for g_apszExtDefRenames entries that requires changing. */ + if ( !pOmfStuff->fMayNeedMangling + && cch >= 5 + && cch <= 7 + && pchName[0] == '_' + && pchName[1] == '_' + && ( pchName[2] == 'U' + || pchName[2] == 'I' + || pchName[2] == 'P') + && ( pchName[3] == '4' + || pchName[3] == '8' + || pchName[3] == 'I' + || pchName[3] == 'T') ) + { + pOmfStuff->fMayNeedMangling = true; + } + } + break; + + /* + * Display public names if -v is specified. + */ + case OMF_PUBDEF32: + case OMF_LPUBDEF32: + pOmfStuff->fProbably32bit = true; + RT_FALL_THRU(); + case OMF_PUBDEF16: + case OMF_LPUBDEF16: + if (g_cVerbose > 0) + { + char const chType = bRecType == OMF_PUBDEF16 || bRecType == OMF_PUBDEF32 ? 'T' : 't'; + const char *pszRec = "LPUBDEF"; + if (chType == 'T') + pszRec++; + + uint16_t idxGrp; + OMF_READ_IDX(idxGrp, [L]PUBDEF); + + uint16_t idxSeg; + OMF_READ_IDX(idxSeg, [L]PUBDEF); + + uint16_t uFrameBase = 0; + if (idxSeg == 0) + { + OMF_CHECK_RET(2, [L]PUBDEF); + uFrameBase = RT_MAKE_U16(pbRec[offRec], pbRec[offRec + 1]); + offRec += 2; + } + if (g_cVerbose > 2) + printf(" %s: idxGrp=%#x idxSeg=%#x uFrameBase=%#x\n", pszRec, idxGrp, idxSeg, uFrameBase); + uint16_t const uSeg = idxSeg ? idxSeg : uFrameBase; + + while (offRec + 1 < cbRec) + { + uint8_t cch = pbRec[offRec++]; + OMF_CHECK_RET(cch, [L]PUBDEF); + const char *pchName = (const char *)&pbRec[offRec]; + offRec += cch; + + uint32_t offSeg; + if (bRecType & OMF_REC32) + { + OMF_CHECK_RET(4, [L]PUBDEF); + offSeg = RT_MAKE_U32_FROM_U8(pbRec[offRec], pbRec[offRec + 1], pbRec[offRec + 2], pbRec[offRec + 3]); + offRec += 4; + } + else + { + OMF_CHECK_RET(2, [L]PUBDEF); + offSeg = RT_MAKE_U16(pbRec[offRec], pbRec[offRec + 1]); + offRec += 2; + } + + uint16_t idxType; + OMF_READ_IDX(idxType, [L]PUBDEF); + + if (g_cVerbose > 2) + printf(" %s[%u]: off=%#010x type=%#x %-*.*s\n", pszRec, cPubDefs, offSeg, idxType, cch, cch, pchName); + else if (g_cVerbose > 0) + printf("%04x:%08x %c %-*.*s\n", uSeg, offSeg, chType, cch, cch, pchName); + } + } + break; + + /* + * Must count segment definitions to figure the index of our segment. + */ + case OMF_SEGDEF16: + case OMF_SEGDEF32: + { + OMF_GROW_TABLE_RET_ERR(OMFSEGDEF, pOmfStuff->paSegDefs, pOmfStuff->cSegDefs, 16); + POMFSEGDEF pSegDef = &pOmfStuff->paSegDefs[pOmfStuff->cSegDefs++]; + + OMF_CHECK_RET(1 + (bRecType == OMF_SEGDEF16 ? 2 : 4) + 1 + 1 + 1, SEGDEF); + pSegDef->f32bitRec = bRecType == OMF_SEGDEF32; + pSegDef->bSegAttr = pbRec[offRec++]; + pSegDef->fUse32 = pSegDef->bSegAttr & 1; + if ((pSegDef->bSegAttr >> 5) == 0) + { + /* A=0: skip frame number of offset. */ + OMF_CHECK_RET(3, SEGDEF); + offRec += 3; + } + if (bRecType == OMF_SEGDEF16) + OMF_READ_U16(pSegDef->cbSeg, SEGDEF16); + else + OMF_READ_U32(pSegDef->cbSeg, SEGDEF32); + OMF_READ_IDX(pSegDef->idxName, SEGDEF); + OMF_READ_IDX(pSegDef->idxClass, SEGDEF); + OMF_READ_IDX(pSegDef->idxOverlay, SEGDEF); + OMF_EXPLODE_LNAME(pOmfStuff, pSegDef->idxName, pSegDef->pchName, pSegDef->cchName, SEGDEF); + OMF_EXPLODE_LNAME(pOmfStuff, pSegDef->idxClass, pSegDef->pchClass, pSegDef->cchClass, SEGDEF); + OMF_EXPLODE_LNAME(pOmfStuff, pSegDef->idxOverlay, pSegDef->pchOverlay, pSegDef->cchOverlay, SEGDEF); + break; + } + + /* + * Must count segment definitions to figure the index of our group. + */ + case OMF_GRPDEF: + { + OMF_GROW_TABLE_RET_ERR(OMFGRPDEF, pOmfStuff->paGrpDefs, pOmfStuff->cGrpDefs, 8); + POMFGRPDEF pGrpDef = &pOmfStuff->paGrpDefs[pOmfStuff->cGrpDefs]; + + OMF_READ_IDX(pGrpDef->idxName, GRPDEF); + OMF_EXPLODE_LNAME(pOmfStuff, pGrpDef->idxName, pGrpDef->pchName, pGrpDef->cchName, GRPDEF); + + unsigned j = RT_ELEMENTS(pOmfStuff->aGroups); + while (j-- > 0) + if (pGrpDef->idxName == pOmfStuff->aGroups[j].idxName) + { + pOmfStuff->aGroups[j].idxGroup = pOmfStuff->cGrpDefs; + break; + } + + pGrpDef->cSegDefs = 0; + pGrpDef->paidxSegDefs = NULL; + while (offRec + 2 + 1 <= cbRec) + { + if (pbRec[offRec] != 0xff) + return error(pszFile, "Unsupported GRPDEF member type: %#x\n", pbRec[offRec]); + offRec++; + OMF_GROW_TABLE_RET_ERR(uint16_t, pGrpDef->paidxSegDefs, pGrpDef->cSegDefs, 16); + OMF_READ_IDX(pGrpDef->paidxSegDefs[pGrpDef->cSegDefs], GRPDEF); + pGrpDef->cSegDefs++; + } + pOmfStuff->cGrpDefs++; + break; + } + + /* + * Gather file names. + */ + case OMF_THEADR: /* watcom */ + cchSrcFile = pbRec[offRec++]; + OMF_CHECK_RET(cchSrcFile, OMF_THEADR); + pchSrcFile = (const char *)&pbRec[offRec]; + if (!collectOmfAddFile(pOmfStuff, cchSrcFile, pchSrcFile, &offSrcInfo)) + return false; + break; + + case OMF_COMENT: + { + OMF_CHECK_RET(2, COMENT); + offRec++; /* skip the type (flags) */ + uint8_t bClass = pbRec[offRec++]; + if (bClass == OMF_CCLS_BORLAND_SRC_FILE) /* nasm */ + { + OMF_CHECK_RET(1+1+4, BORLAND_SRC_FILE); + offRec++; /* skip unknown byte */ + cchSrcFile = pbRec[offRec++]; + OMF_CHECK_RET(cchSrcFile + 4, BORLAND_SRC_FILE); + pchSrcFile = (const char *)&pbRec[offRec]; + offRec += cchSrcFile; + if (offRec + 4 + 1 != cbRec) + return error(pszFile, "BAD BORLAND_SRC_FILE record at %#x: %d bytes left\n", + off, cbRec - offRec - 4 - 1); + if (!collectOmfAddFile(pOmfStuff, cchSrcFile, pchSrcFile, &offSrcInfo)) + return false; + break; + } + break; + } + + /* + * Line number conversion. + */ + case OMF_LINNUM16: + case OMF_LINNUM32: + { + uint16_t idxGrp; + OMF_READ_IDX(idxGrp, LINNUM); + uint16_t idxSeg; + OMF_READ_IDX(idxSeg, LINNUM); + + uint16_t iLine; + uint32_t offSeg; + if (bRecType == OMF_LINNUM16) + while (offRec + 4 < cbRec) + { + iLine = RT_MAKE_U16(pbRec[offRec + 0], pbRec[offRec + 1]); + offSeg = RT_MAKE_U16(pbRec[offRec + 2], pbRec[offRec + 3]); + if (!collectOmfAddLine(pOmfStuff, idxSeg, offSeg, iLine, offSrcInfo)) + return false; + offRec += 4; + } + else + while (offRec + 6 < cbRec) + { + iLine = RT_MAKE_U16(pbRec[offRec + 0], pbRec[offRec + 1]); + offSeg = RT_MAKE_U32_FROM_U8(pbRec[offRec + 2], pbRec[offRec + 3], pbRec[offRec + 4], pbRec[offRec + 5]); + if (!collectOmfAddLine(pOmfStuff, idxSeg, offSeg, iLine, offSrcInfo)) + return false; + offRec += 6; + } + if (offRec + 1 != cbRec) + return error(pszFile, "BAD LINNUM record at %#x: %d bytes left\n", off, cbRec - offRec - 1); + break; + } + } + + /* advance */ + off += cbRec + 3; + } + + return true; +#undef OMF_READ_IDX +#undef OMF_CHECK_RET +} + + +/** + * Adds a LNAMES entry (returns existing). + * + * @returns success indicator. + * @param pOmfStuff The OMF stuff. + * @param pszName The name to add. + * @param pidxName Where to return the name index. + */ +static bool omfDetails_AddLName(POMFDETAILS pOmfStuff, const char *pszName, uint16_t *pidxName) +{ + size_t const cchName = strlen(pszName); + + /* + * Check if we've already got the name. + */ + for (unsigned iName = 1; iName < pOmfStuff->cLNames; iName++) + if ( (unsigned char)pOmfStuff->papchLNames[iName][0] == cchName + && memcmp(pOmfStuff->papchLNames[iName] + 1, pszName, cchName) == 0) + { + *pidxName = iName; + return true; + } + + /* + * Not found, append it. + */ + char *pszCopy = (char *)omfDetails_Alloc(pOmfStuff, cchName + 2); + if (!pszCopy) + return false; + *(unsigned char *)&pszCopy[0] = (unsigned char)cchName; + memcpy(pszCopy + 1, pszName, cchName + 1); + + OMF_GROW_TABLE_RET_ERR(char *, pOmfStuff->papchLNames, pOmfStuff->cLNames, 16); + pOmfStuff->papchLNames[pOmfStuff->cLNames] = (char *)pszCopy; + *pidxName = pOmfStuff->cLNames; + pOmfStuff->cLNames++; + return true; +} + + +/** + * Adds a SEGDEF (always adds a new one). + * + * @returns success indicator. + * @param pOmfStuff The OMF stuff. + * @param bSegAttr The OMF segment attributes. + * @param cbSeg The segment size. + * @param idxSegName The LNAMES index of the segment name. + * @param idxSegClas The LNAMES index of the segment class. + * @param idxOverlay The LNAMES index of the overlay name; pass 1. + * @param fRec32 Set if SEGDEF32 should be emitted, clear for SEGDEF16. + * @param pidxSeg Where to return the segment index. + */ +static bool omfDetails_AddSegDef(POMFDETAILS pOmfStuff, uint8_t bSegAttr, uint32_t cbSeg, uint16_t idxSegName, + uint16_t idxSegClass, uint16_t idxOverlay, bool fRec32, uint16_t *pidxSeg) +{ + Assert(cbSeg <= UINT16_MAX || fRec32); + Assert(idxSegName < pOmfStuff->cLNames); + Assert(idxSegClass < pOmfStuff->cLNames); + + OMF_GROW_TABLE_RET_ERR(OMFSEGDEF, pOmfStuff->paSegDefs, pOmfStuff->cSegDefs, 16); + POMFSEGDEF pSegDef = &pOmfStuff->paSegDefs[pOmfStuff->cSegDefs]; + + pSegDef->bSegAttr = bSegAttr; + pSegDef->fUse32 = bSegAttr & 1; + pSegDef->f32bitRec = fRec32; + pSegDef->cbSeg = cbSeg; + pSegDef->idxName = idxSegName; + pSegDef->idxClass = idxSegClass; + pSegDef->idxOverlay = idxOverlay; + + OMF_EXPLODE_LNAME(pOmfStuff, pSegDef->idxName, pSegDef->pchName, pSegDef->cchName, SEGDEF); + OMF_EXPLODE_LNAME(pOmfStuff, pSegDef->idxClass, pSegDef->pchClass, pSegDef->cchClass, SEGDEF); + OMF_EXPLODE_LNAME(pOmfStuff, pSegDef->idxOverlay, pSegDef->pchOverlay, pSegDef->cchOverlay, SEGDEF); + + *pidxSeg = pOmfStuff->cSegDefs; + pOmfStuff->cSegDefs++; + return true; +} + + +/** + * Adds a SEGDEF if not found. + * + * @returns success indicator. + * @param pOmfStuff The OMF stuff. + * @param bSegAttr The OMF segment attributes. + * @param cbSeg The segment size. + * @param idxSegName The LNAMES index of the segment name. + * @param idxSegClas The LNAMES index of the segment class. + * @param idxOverlay The LNAMES index of the overlay name; pass 1. + * @param fRec32 Set if SEGDEF32 should be emitted, clear for SEGDEF16. + * @param pidxSeg Where to return the segment index. + */ +static bool omfDetails_AddSegDefIfNeeded(POMFDETAILS pOmfStuff, uint8_t bSegAttr, uint32_t cbSeg, uint16_t idxSegName, + uint16_t idxSegClass, uint16_t idxOverlay, bool fRec32, uint16_t *pidxSeg) +{ + /* Search for name */ + for (unsigned iSegDef = 1; iSegDef < pOmfStuff->cSegDefs; iSegDef++) + { + POMFSEGDEF pSegDef = &pOmfStuff->paSegDefs[iSegDef]; + if (pSegDef->idxName == idxSegName) + { + if ( pSegDef->bSegAttr != bSegAttr + || pSegDef->f32bitRec != fRec32 + || pSegDef->idxName != idxSegName + || pSegDef->idxClass != idxSegClass + || pSegDef->idxOverlay != idxOverlay) + return error(pOmfStuff->pszFile, + "Existing SEGDEF differs: bSegAttr=%#x vs %#x, f32bitRec=%d vs %d, idxName=%#x vs %#x, idxClass=%#x vs %#x, idxOverlay=%#x vs %#x\n", + pSegDef->bSegAttr, bSegAttr, + pSegDef->f32bitRec, fRec32, + pSegDef->idxName, idxSegName, + pSegDef->idxClass, idxSegClass, + pSegDef->idxOverlay, idxOverlay); + *pidxSeg = iSegDef; + return true; + } + } + return omfDetails_AddSegDef(pOmfStuff, bSegAttr, cbSeg, idxSegName, idxSegClass, idxOverlay, fRec32, pidxSeg); +} + + +#if 0 /* unused */ +/** + * Looks up a GRPDEF in the . + * + * @returns Index (0..32K) if found, UINT16_MAX if not found. + * @param pOmfStuff The OMF stuff. + * @param pchName The name to look up. + * @param cchName The length of the name. + */ +static uint16_t omfDetails_GrpDefLookupN(POMFDETAILS pOmfStuff, const char *pchName, size_t cchName) +{ + unsigned iGrpDef = pOmfStuff->cGrpDefs; + while (iGrpDef-- > 0) + { + if ( pOmfStuff->paGrpDefs[iGrpDef].cchName == cchName + && memcmp(pOmfStuff->paGrpDefs[iGrpDef].pchName, pchName, cchName) == 0) + return iGrpDef; + } + return UINT16_MAX; +} +#endif + + +/** + * Adds an empty GRPDEF (always adds a new one). + * + * @returns success indicator. + * @param pOmfStuff The OMF stuff. + * @param idxGrpName The LNAMES index of the group name. + * @param pidxGrp Where to return the group index. + */ +static bool omfDetails_AddGrpDef(POMFDETAILS pOmfStuff, uint16_t idxGrpName, uint16_t *pidxGrp) +{ + Assert(idxGrpName < pOmfStuff->cLNames); + + OMF_GROW_TABLE_RET_ERR(OMFGRPDEF, pOmfStuff->paGrpDefs, pOmfStuff->cGrpDefs, 8); + POMFGRPDEF pGrpDef = &pOmfStuff->paGrpDefs[pOmfStuff->cGrpDefs]; + + pGrpDef->idxName = idxGrpName; + pGrpDef->cSegDefs = 0; + pGrpDef->paidxSegDefs = NULL; + + *pidxGrp = pOmfStuff->cGrpDefs; + pOmfStuff->cGrpDefs++; + return true; +} + + +/** + * Adds a segment to an existing GRPDEF. + * + * @returns success indicator. + * @param pOmfStuff The OMF stuff. + * @param idxGrp The GRPDEF index of the group to append a member to. + * @param idxSeg The SEGDEF index of the segment name. + */ +static bool omfDetails_AddSegToGrpDef(POMFDETAILS pOmfStuff, uint16_t idxGrp, uint16_t idxSeg) +{ + Assert(idxGrp < pOmfStuff->cGrpDefs && idxGrp > 0); + Assert(idxSeg < pOmfStuff->cSegDefs && idxSeg > 0); + + POMFGRPDEF pGrpDef = &pOmfStuff->paGrpDefs[idxGrp]; + OMF_GROW_TABLE_RET_ERR(uint16_t, pGrpDef->paidxSegDefs, pGrpDef->cSegDefs, 16); + pGrpDef->paidxSegDefs[pGrpDef->cSegDefs] = idxSeg; + pGrpDef->cSegDefs++; + + return true; +} + + +/** + * Marks 16-bit code segment groups that is used in the object file as needed. + * + * @param pOmfStuff The OMF stuff. + */ +static void convertOmfLookForNeededGroups(POMFDETAILS pOmfStuff) +{ + /* + * Consult the groups in question. We mark the groups which segments are + * included in the segment definitions as needed. + */ + unsigned i = RT_ELEMENTS(pOmfStuff->aGroups); + while (i-- > 0) + if (pOmfStuff->aGroups[i].pszSeg) + { + const char * const pszSegNm = pOmfStuff->aGroups[i].pszSeg; + size_t const cchSegNm = strlen(pszSegNm); + for (unsigned iSegDef = 0; iSegDef < pOmfStuff->cSegDefs; iSegDef++) + if ( pOmfStuff->paSegDefs[iSegDef].cchName == cchSegNm + && memcmp(pOmfStuff->paSegDefs[iSegDef].pchName, pszSegNm, cchSegNm) == 0) + { + pOmfStuff->aGroups[i].fNeeded = true; + break; + } + } +} + + +/** + * Adds necessary group and segment definitions. + * + * @returns success indicator. + * @param pOmfStuff The OMF stuff. + */ +static bool convertOmfAddNeededGrpDefs(POMFDETAILS pOmfStuff) +{ + /* + * Process the groups. + */ + unsigned j = RT_ELEMENTS(pOmfStuff->aGroups); + while (j-- > 0) + if (pOmfStuff->aGroups[j].fNeeded) + { + if (pOmfStuff->aGroups[j].idxName == UINT16_MAX) + { + Assert(pOmfStuff->aGroups[j].idxGroup == UINT16_MAX); + if (!omfDetails_AddLName(pOmfStuff, pOmfStuff->aGroups[j].pszName, &pOmfStuff->aGroups[j].idxName)) + return false; + } + if (pOmfStuff->aGroups[j].idxGroup == UINT16_MAX) + { + if (!omfDetails_AddGrpDef(pOmfStuff, pOmfStuff->aGroups[j].idxName, &pOmfStuff->aGroups[j].idxGroup)) + return false; + + if (pOmfStuff->aGroups[j].pszSeg) + { + /* We need the segment class name. */ + uint16_t idxSegClass; + if (!omfDetails_AddLName(pOmfStuff, pOmfStuff->aGroups[j].pszClass1, &idxSegClass)) + return false; + + /* Prep segment name buffer. */ + size_t cchSegNm = strlen(pOmfStuff->aGroups[j].pszSeg); + char szSegNm[256+16]; + Assert(cchSegNm < 256); + memcpy(szSegNm, pOmfStuff->aGroups[j].pszSeg, cchSegNm); + + /* Add the three segments. */ + static RTSTRTUPLE const s_aSuffixes[3] = { {RT_STR_TUPLE("_START")}, {RT_STR_TUPLE("")}, {RT_STR_TUPLE("_END")}, }; + for (unsigned iSuffix = 0; iSuffix < RT_ELEMENTS(s_aSuffixes); iSuffix++) + { + uint16_t idxSegNm; + memcpy(&szSegNm[cchSegNm], s_aSuffixes[iSuffix].psz, s_aSuffixes[iSuffix].cch + 1); + if (!omfDetails_AddLName(pOmfStuff, szSegNm, &idxSegNm)) + return false; + uint8_t const fAlign = iSuffix == 1 ? OMF_SEG_ATTR_ALIGN_BYTE : OMF_SEG_ATTR_ALIGN_PARA; + uint16_t idxSeg; + if (!omfDetails_AddSegDefIfNeeded(pOmfStuff, fAlign | OMF_SEG_ATTR_COMB_PUBLIC | OMF_SEG_ATTR_USE16, + 0, idxSegNm, idxSegClass, 1, false /*fRec*/, &idxSeg)) + return false; + if (!omfDetails_AddSegToGrpDef(pOmfStuff, pOmfStuff->aGroups[j].idxGroup, idxSeg)) + return false; + } + } + } + } + + /* + * Replace group references in the segment lines table. + */ + j = RT_ELEMENTS(pOmfStuff->aGroups); + while (j-- > 0) + if (pOmfStuff->aGroups[j].fNeeded) + for (unsigned i = 0; i < pOmfStuff->cSegLines; i++) + if (pOmfStuff->paSegLines[i].idxGrp == pOmfStuff->aGroups[j].idxReplaceGrp) + pOmfStuff->paSegLines[i].idxGrp = pOmfStuff->aGroups[j].idxGroup; + return true; +} + + +/** + * Adds the debug segment definitions (names too) to the OMF state. + * + * @returns success indicator. + * @param pOmfStuff The OMF stuff with CV8 line number info. + */ +static bool convertOmfAddDebugSegDefs(POMFDETAILS pOmfStuff) +{ + if ( pOmfStuff->cSegLines == 0 + || pOmfStuff->iSymbolsSeg != UINT16_MAX) + return true; + + /* + * Add the names we need. + */ + if ( pOmfStuff->iSymbolsNm == UINT16_MAX + && !omfDetails_AddLName(pOmfStuff, "$$SYMBOLS", &pOmfStuff->iSymbolsNm)) + return false; + if ( pOmfStuff->iDebSymNm == UINT16_MAX + && !omfDetails_AddLName(pOmfStuff, "DEBSYM", &pOmfStuff->iDebSymNm)) + return false; + + /* + * Add the segment definition. + */ + uint8_t bSegAttr = 0; + bSegAttr |= 5 << 5; /* A: dword alignment */ + bSegAttr |= 0 << 2; /* C: private */ + bSegAttr |= 0 << 1; /* B: not big */ + bSegAttr |= 1; /* D: use32 */ + + /* calc the segment size. */ + uint32_t cbSeg = 4; /* dword 4 */ + cbSeg += 4 + 4 + RT_ALIGN_32(pOmfStuff->cbStrTab, 4); + cbSeg += 4 + 4 + pOmfStuff->cSrcInfo * sizeof(pOmfStuff->paSrcInfo[0]); + uint32_t i = pOmfStuff->cSegLines; + while (i-- > 0) + if (pOmfStuff->paSegLines[i].cFiles > 0) + cbSeg += 4 + 4 + pOmfStuff->paSegLines[i].cb; + return omfDetails_AddSegDef(pOmfStuff, bSegAttr, cbSeg, pOmfStuff->iSymbolsNm, pOmfStuff->iDebSymNm, 1 /*idxOverlay*/, + true /*fRec32*/, &pOmfStuff->iSymbolsSeg); +} + + +/** + * Writes the debug segment data. + * + * @returns success indicator. + * @param pThis The OMF writer. + * @param pOmfStuff The OMF stuff with CV8 line number info. + */ +static bool convertOmfWriteDebugData(POMFWRITER pThis, POMFDETAILS pOmfStuff) +{ + if (pOmfStuff->cSegLines == 0) + return true; + Assert(pOmfStuff->iSymbolsSeg != UINT16_MAX); + + /* Begin and write the CV version signature. */ + if ( !omfWriter_LEDataBegin(pThis, pOmfStuff->iSymbolsSeg, 0) + || !omfWriter_LEDataAddU32(pThis, RTCVSYMBOLS_SIGNATURE_CV8)) + return false; + + /* + * Emit the string table (no fixups). + */ + uint32_t cbLeft = pOmfStuff->cbStrTab; + if ( !omfWriter_LEDataAddU32(pThis, RTCV8SYMBLOCK_TYPE_SRC_STR) + || !omfWriter_LEDataAddU32(pThis, cbLeft) + || !omfWriter_LEDataAddBytes(pThis, pOmfStuff->pchStrTab, RT_ALIGN_32(cbLeft, 4)) ) /* table is zero padded to nearest dword */ + return false; + + /* + * Emit the source file info table (no fixups). + */ + cbLeft = pOmfStuff->cSrcInfo * sizeof(pOmfStuff->paSrcInfo[0]); + if ( !omfWriter_LEDataAddU32(pThis, RTCV8SYMBLOCK_TYPE_SRC_INFO) + || !omfWriter_LEDataAddU32(pThis, cbLeft) + || !omfWriter_LEDataAddBytes(pThis, pOmfStuff->paSrcInfo, cbLeft) ) + return false; + + /* + * Emit the segment line numbers. There are two fixups here at the start + * of each chunk. + */ + POMFSEGLINES pSegLines = pOmfStuff->paSegLines; + uint32_t i = pOmfStuff->cSegLines; + while (i-- > 0) + { + if (pSegLines->cFiles) + { + /* Calc covered area. */ + uint32_t cbSectionCovered = 0; + uint32_t j = pSegLines->cFiles; + while (j-- > 0) + { + uint32_t offLast = pSegLines->paFiles[j].paPairs[pSegLines->paFiles[j].cPairs - 1].offSection; + if (offLast > cbSectionCovered) + offLast = cbSectionCovered; + } + + /* For simplicity and debuggability, just split the LEDATA here. */ + if ( !omfWriter_LEDataSplit(pThis) + || !omfWriter_LEDataAddU32(pThis, RTCV8SYMBLOCK_TYPE_SECT_LINES) + || !omfWriter_LEDataAddU32(pThis, pSegLines->cb) + || !omfWriter_LEDataAddU32(pThis, 0) /*RTCV8LINESHDR::offSection*/ + || !omfWriter_LEDataAddU16(pThis, 0) /*RTCV8LINESHDR::iSection*/ + || !omfWriter_LEDataAddU16(pThis, 0) /*RTCV8LINESHDR::u16Padding*/ + || !omfWriter_LEDataAddU32(pThis, cbSectionCovered) /*RTCV8LINESHDR::cbSectionCovered*/ ) + return false; + + /* Default to the segment (BS3TEXT32, BS3TEXT64) or the group (CGROUP16, + RMGROUP16, etc). The important thing is that we're framing the fixups + using a segment or group which ends up in the codeview segment map. */ + uint16_t idxFrame = pSegLines->idxSeg; + uint8_t bFrame = OMF_FIX_F_SEGDEF; + if (pSegLines->idxGrp != UINT16_MAX) + { + idxFrame = pSegLines->idxGrp; + bFrame = OMF_FIX_F_GRPDEF; + } + + /* Fixup #1: segment offset - IMAGE_REL_AMD64_SECREL. */ + if (!omfWriter_LEDataAddFixupNoDisp(pThis, 4 + 4 + RT_UOFFSETOF(RTCV8LINESHDR, offSection), OMF_FIX_LOC_32BIT_OFFSET, + bFrame, idxFrame, OMF_FIX_T_SEGDEF_NO_DISP, pSegLines->idxSeg)) + return false; + + + /* Fixup #2: segment number - IMAGE_REL_AMD64_SECTION. */ + if (!omfWriter_LEDataAddFixupNoDisp(pThis, 4 + 4 + RT_UOFFSETOF(RTCV8LINESHDR, iSection), OMF_FIX_LOC_16BIT_SEGMENT, + bFrame, idxFrame, OMF_FIX_T_SEGDEF_NO_DISP, pSegLines->idxSeg)) + return false; + + /* Emit data for each source file. */ + for (j = 0; j < pSegLines->cFiles; j++) + { + uint32_t const cbPairs = pSegLines->paFiles[j].cPairs * sizeof(RTCV8LINEPAIR); + if ( !omfWriter_LEDataAddU32(pThis, pSegLines->paFiles[j].offSrcInfo) /*RTCV8LINESSRCMAP::offSourceInfo*/ + || !omfWriter_LEDataAddU32(pThis, pSegLines->paFiles[j].cPairs) /*RTCV8LINESSRCMAP::cLines*/ + || !omfWriter_LEDataAddU32(pThis, cbPairs + sizeof(RTCV8LINESSRCMAP)) /*RTCV8LINESSRCMAP::cb*/ + || !omfWriter_LEDataAddBytes(pThis, pSegLines->paFiles[j].paPairs, cbPairs)) + return false; + } + } + pSegLines++; + } + + return omfWriter_LEDataEnd(pThis); +} + + +/** + * Writes out all the segment group definitions. + * + * @returns success indicator. + * @param pThis The OMF writer. + * @param pOmfStuff The OMF stuff containing the segment defs. + * @param pfFlushState Pointer to the flush state variable. + */ +static bool convertOmfWriteAllSegDefs(POMFWRITER pThis, POMFDETAILS pOmfStuff, int *pfFlushState) +{ + if (*pfFlushState > 0) + { + for (unsigned iSegDef = 1; iSegDef < pOmfStuff->cSegDefs; iSegDef++) + { + if (!(pOmfStuff->paSegDefs[iSegDef].f32bitRec + ? omfWriter_SegDef : omfWriter_SegDef16)(pThis, pOmfStuff->paSegDefs[iSegDef].bSegAttr, + pOmfStuff->paSegDefs[iSegDef].cbSeg, + pOmfStuff->paSegDefs[iSegDef].idxName, + pOmfStuff->paSegDefs[iSegDef].idxClass, + pOmfStuff->paSegDefs[iSegDef].idxOverlay)) + return false; + } + *pfFlushState = -1; + } + return true; +} + + +/** + * Writes out all the segment group definitions. + * + * @returns success indicator. + * @param pThis The OMF writer. + * @param pOmfStuff The OMF stuff containing the group defs. + * @param pfFlushState Pointer to the flush state variable. + */ +static bool convertOmfWriteAllGrpDefs(POMFWRITER pThis, POMFDETAILS pOmfStuff, int *pfFlushState) +{ + if (*pfFlushState > 0) + { + for (unsigned iGrpDef = 1; iGrpDef < pOmfStuff->cGrpDefs; iGrpDef++) + { + if (!omfWriter_GrpDefBegin(pThis, pOmfStuff->paGrpDefs[iGrpDef].idxName)) + return false; + for (unsigned iSegDef = 0; iSegDef < pOmfStuff->paGrpDefs[iGrpDef].cSegDefs; iSegDef++) + if (!omfWriter_GrpDefAddSegDef(pThis, pOmfStuff->paGrpDefs[iGrpDef].paidxSegDefs[iSegDef])) + return false; + if (!omfWriter_GrpDefEnd(pThis)) + return false; + } + *pfFlushState = -1; + } + return true; +} + + +/** + * This does the actual converting, passthru style. + * + * It only modifies, removes and inserts stuff it care about, the rest is passed + * thru as-is. + * + * @returns success indicator. + * @param pThis The OMF writer. + * @param pbFile The original file content. + * @param cbFile The size of the original file. + * @param pOmfStuff The OMF stuff we've gathered during the first pass, + * contains CV8 line number info if we converted anything. + * @param fConvertLineNumbers Whether we're converting line numbers and stuff. + */ +static bool convertOmfPassthru(POMFWRITER pThis, uint8_t const *pbFile, size_t cbFile, POMFDETAILS pOmfStuff, + bool fConvertLineNumbers) +{ + int fFlushLNames = 1; + int fFlushSegDefs = 1; + int fFlushGrpDefs = 1; + bool fSeenTheAdr = false; + bool fConvertFixupp = false; + + uint32_t off = 0; + while (off + 3 < cbFile) + { + uint8_t bRecType = pbFile[off]; + uint16_t cbRec = RT_MAKE_U16(pbFile[off + 1], pbFile[off + 2]); + uint32_t offRec = 0; + uint8_t const *pbRec = &pbFile[off + 3]; + +#define OMF_READ_IDX(a_idx, a_Name) \ + do { \ + a_idx = pbRec[offRec++]; \ + if ((a_idx) & 0x80) \ + a_idx = (((a_idx) & 0x7f) << 8) | pbRec[offRec++]; \ + } while (0) + +#define OMF_PEEK_IDX(a_idx, a_offRec) \ + do { \ + a_idx = pbRec[a_offRec]; \ + if ((a_idx) & 0x80) \ + a_idx = (((a_idx) & 0x7f) << 8) | pbRec[(a_offRec) + 1]; \ + } while (0) + + /* + * Remove/insert switch. will + */ + bool fSkip = false; + switch (bRecType) + { + /* + * Mangle watcom intrinsics if necessary. + */ + case OMF_EXTDEF: + if (pOmfStuff->fMayNeedMangling) + { + if (!omfWriter_ExtDefBegin(pThis)) + return false; + while (offRec + 1 < cbRec) + { + uint8_t cchName = pbRec[offRec++]; + char *pchName = (char *)&pbRec[offRec]; + offRec += cchName; + + uint16_t idxType; + OMF_READ_IDX(idxType, EXTDEF); + + /* Look for g_apszExtDefRenames entries that requires changing. */ + if ( cchName >= 5 + && cchName <= 7 + && pchName[0] == '_' + && pchName[1] == '_' + && ( pchName[2] == 'U' + || pchName[2] == 'I' + || pchName[2] == 'P') + && ( pchName[3] == '4' + || pchName[3] == '8' + || pchName[3] == 'I' + || pchName[3] == 'T') ) + { + char szName[12]; + memcpy(szName, pchName, cchName); + szName[cchName] = '\0'; + + uint32_t i = RT_ELEMENTS(g_apszExtDefRenames); + while (i-- > 0) + if ( cchName == (uint8_t)g_apszExtDefRenames[i][0] + && memcmp(&g_apszExtDefRenames[i][1], szName, cchName) == 0) + { + szName[0] = pOmfStuff->fProbably32bit ? '?' : '_'; + szName[1] = '?'; + break; + } + + if (!omfWriter_ExtDefAddN(pThis, szName, cchName, idxType, false /*fPrependUnderscore*/)) + return false; + } + else if (!omfWriter_ExtDefAddN(pThis, pchName, cchName, idxType, false /*fPrependUnderscore*/)) + return false; + } + if (!omfWriter_ExtDefEnd(pThis)) + return false; + fSkip = true; + } + break; + + /* + * Remove line number records. + */ + case OMF_LINNUM16: + case OMF_LINNUM32: + fSkip = fConvertLineNumbers; + break; + + /* + * Remove all but the first OMF_THEADR. + */ + case OMF_THEADR: + fSkip = fSeenTheAdr && fConvertLineNumbers; + fSeenTheAdr = true; + break; + + /* + * Remove borland source file changes. Also, make sure the group + * definitions are written out. + */ + case OMF_COMENT: + if (pbRec[1] == OMF_CCLS_LINK_PASS_SEP) + { + Assert(fFlushSegDefs <= 0); + if ( fFlushGrpDefs > 0 + && !convertOmfWriteAllGrpDefs(pThis, pOmfStuff, &fFlushGrpDefs)) + return false; + } + if (fConvertLineNumbers) + fSkip = pbRec[1] == OMF_CCLS_BORLAND_SRC_FILE; + break; + + /* + * Redo these so the OMF writer is on top of the index thing. + */ + case OMF_LNAMES: + if (fFlushLNames >= 0) + { + if (!omfWriter_LNamesBegin(pThis, false /*fAddZeroEntry*/)) + return false; + if (!fFlushLNames) + { + while (offRec + 1 < cbRec) + { + uint8_t cch = pbRec[offRec]; + const char *pch = (const char *)&pbRec[offRec + 1]; + if (!omfWriter_LNamesAddN(pThis, pch, cch, NULL)) + return false; + offRec += cch + 1; + } + } + else + { + /* Flush all LNAMES in one go. */ + for (unsigned i = 1; i < pOmfStuff->cLNames; i++) + if (!omfWriter_LNamesAddN(pThis, pOmfStuff->papchLNames[i] + 1, *pOmfStuff->papchLNames[i], NULL)) + return false; + fFlushLNames = -1; + } + if (!omfWriter_LNamesEnd(pThis)) + return false; + } + fSkip = true; + break; + + /* + * We may want to flush all the segments when we see the first one. + */ + case OMF_SEGDEF16: + case OMF_SEGDEF32: + fSkip = fFlushSegDefs != 0; + if (!convertOmfWriteAllSegDefs(pThis, pOmfStuff, &fFlushSegDefs)) + return false; + break; + + /* + * We may want to flush all the groups when we see the first one. + */ + case OMF_GRPDEF: + fSkip = fFlushGrpDefs != 0; + if (!convertOmfWriteAllGrpDefs(pThis, pOmfStuff, &fFlushGrpDefs)) + return false; + break; + + /* + * Hook LEDATA to flush groups and figure out when to convert FIXUPP records. + */ + case OMF_LEDATA16: + case OMF_LEDATA32: + if ( fFlushGrpDefs > 0 + && !convertOmfWriteAllGrpDefs(pThis, pOmfStuff, &fFlushGrpDefs)) + return false; + fConvertFixupp = false; +#if 0 + if ( g_f16BitWatcomC + && bRecType == OMF_LEDATA16) + { + /* Check if this is a code segment. */ + uint16_t idxSeg; + OMF_PEEK_IDX(idxSeg, offRec); + + } +#endif + break; + + + /* + * Convert fixups for 16-bit code segments to groups. + * Deals with switch table trouble. + */ + case OMF_FIXUPP16: + if (fConvertFixupp) + { + /* Gave up on this for now, easier to drop the eyecatcher in the _START segments. */ + } + break; + + /* + * Upon seeing MODEND we write out the debug info. + */ + case OMF_MODEND16: + case OMF_MODEND32: + if (fConvertLineNumbers) + if (!convertOmfWriteDebugData(pThis, pOmfStuff)) + return false; + break; + } + + /* + * Pass the record thru, if so was decided. + */ + if (!fSkip) + { + if ( omfWriter_RecBegin(pThis, bRecType) + && omfWriter_RecAddBytes(pThis, pbRec, cbRec) + && omfWriter_RecEnd(pThis, false)) + { /* likely */ } + else return false; + } + + /* advance */ + off += cbRec + 3; + } + + return true; +} + + +/** + * Converts LINNUMs and compiler intrinsics in an OMF object file. + * + * Wlink does a cheesy (to use their own term) job of generating the + * sstSrcModule subsection. It is limited to one file and cannot deal with line + * numbers in different segment. The latter is very annoying in assembly files + * that jumps between segments, these a frequent on crash stacks. + * + * The solution is to convert to the same line number tables that cl.exe /Z7 + * generates for our 64-bit C code, we named that format codeview v8, or CV8. + * Our code codeview debug info reader can deal with this already because of the + * 64-bit code, so Bob's your uncle. + * + * @returns success indicator. + * @param pszFile The name of the file being converted. + * @param pbFile The file content. + * @param cbFile The size of the file content. + * @param pDst The destiation (output) file. + */ +static bool convertOmfToOmf(const char *pszFile, uint8_t const *pbFile, size_t cbFile, FILE *pDst) +{ + bool const fConvertLineNumbers = true; + + /* + * Collect line number information, names, segment defintions, groups definitions and such. + */ + OMFDETAILS OmfStuff; + if (!collectOmfDetails(pszFile, pbFile, cbFile, &OmfStuff)) + return false; + + /* Mark groups for 16-bit code segments used by this object file as needed + so we can reframe fixups to these segments correctly. */ + convertOmfLookForNeededGroups(&OmfStuff); + + /* Add debug segments definitions. */ + bool fRc = true; + if (fConvertLineNumbers) + fRc = convertOmfAddDebugSegDefs(&OmfStuff); + + /* Add any additional group defintions we may need (for 16-bit code segs). */ + if (fRc) + fRc = convertOmfAddNeededGrpDefs(&OmfStuff); + if (fRc) + { + /* + * Instantiate the OMF writer and do pass-thru modifications. + */ + POMFWRITER pThis = omfWriter_Create(pszFile, 0, 0, pDst); + if (pThis) + { + fRc = convertOmfPassthru(pThis, pbFile, cbFile, &OmfStuff, fConvertLineNumbers); + omfWriter_Destroy(pThis); + } + else + fRc = false; + } + + /* + * Cleanup OmfStuff. + */ + uint32_t i = OmfStuff.cSegLines; + while (i-- >0) + { + uint32_t j = OmfStuff.paSegLines[i].cFiles; + while (j-- > 0) + free(OmfStuff.paSegLines[i].paFiles[j].paPairs); + free(OmfStuff.paSegLines[i].paFiles); + } + free(OmfStuff.paSegLines); + free(OmfStuff.paSrcInfo); + free(OmfStuff.pchStrTab); + + while (OmfStuff.pAllocHead) + { + POMFDETAILSALLOC pFreeMe = OmfStuff.pAllocHead; + OmfStuff.pAllocHead = OmfStuff.pAllocHead->pNext; + free(pFreeMe); + } + + return fRc; +} + + +/** + * Does the convertion using convertelf and convertcoff. + * + * @returns exit code (0 on success, non-zero on failure) + * @param pszFile The file to convert. + */ +static int convertit(const char *pszFile) +{ + /* Construct the filename for saving the unmodified file. */ + char szOrgFile[_4K]; + size_t cchFile = strlen(pszFile); + if (cchFile + sizeof(".original") > sizeof(szOrgFile)) + { + error(pszFile, "Filename too long!\n"); + return RTEXITCODE_FAILURE; + } + memcpy(szOrgFile, pszFile, cchFile); + memcpy(&szOrgFile[cchFile], ".original", sizeof(".original")); + + /* Read the whole file. */ + void *pvFile; + size_t cbFile; + if (readfile(pszFile, &pvFile, &cbFile)) + { + /* + * Do format conversions / adjustments. + */ + bool fRc = false; + uint8_t *pbFile = (uint8_t *)pvFile; + if ( cbFile > sizeof(Elf64_Ehdr) + && pbFile[0] == ELFMAG0 + && pbFile[1] == ELFMAG1 + && pbFile[2] == ELFMAG2 + && pbFile[3] == ELFMAG3) + { + if (writefile(szOrgFile, pvFile, cbFile)) + { + FILE *pDst = openfile(pszFile, true /*fWrite*/); + if (pDst) + { + fRc = convertElfToOmf(pszFile, pbFile, cbFile, pDst); + fRc = fclose(pDst) == 0 && fRc; + } + } + } + else if ( cbFile > sizeof(IMAGE_FILE_HEADER) + && RT_MAKE_U16(pbFile[0], pbFile[1]) == IMAGE_FILE_MACHINE_AMD64 + && RT_MAKE_U16(pbFile[2], pbFile[3]) * sizeof(IMAGE_SECTION_HEADER) + sizeof(IMAGE_FILE_HEADER) + < cbFile + && RT_MAKE_U16(pbFile[2], pbFile[3]) > 0) + { + if (writefile(szOrgFile, pvFile, cbFile)) + { + FILE *pDst = openfile(pszFile, true /*fWrite*/); + if (pDst) + { + fRc = convertCoffToOmf(pszFile, pbFile, cbFile, pDst); + fRc = fclose(pDst) == 0 && fRc; + } + } + } + else if ( cbFile >= 8 + && pbFile[0] == OMF_THEADR + && RT_MAKE_U16(pbFile[1], pbFile[2]) < cbFile) + { + if (writefile(szOrgFile, pvFile, cbFile)) + { + FILE *pDst = openfile(pszFile, true /*fWrite*/); + if (pDst) + { + fRc = convertOmfToOmf(pszFile, pbFile, cbFile, pDst); + fRc = fclose(pDst) == 0 && fRc; + } + } + } + else + fprintf(stderr, "error: Don't recognize format of '%s' (%#x %#x %#x %#x, cbFile=%lu)\n", + pszFile, pbFile[0], pbFile[1], pbFile[2], pbFile[3], (unsigned long)cbFile); + free(pvFile); + if (fRc) + return 0; + } + return 1; +} + + +int main(int argc, char **argv) +{ + int rcExit = 0; + + /* + * Scan the arguments. + */ + for (int i = 1; i < argc; i++) + { + if (argv[i][0] == '-') + { + const char *pszOpt = &argv[i][1]; + if (*pszOpt == '-') + { + /* Convert long options to short ones. */ + pszOpt--; + if (!strcmp(pszOpt, "--wcc")) + pszOpt = "w"; + else if (!strcmp(pszOpt, "--verbose")) + pszOpt = "v"; + else if (!strcmp(pszOpt, "--version")) + pszOpt = "V"; + else if (!strcmp(pszOpt, "--help")) + pszOpt = "h"; + else + { + fprintf(stderr, "syntax errro: Unknown options '%s'\n", pszOpt); + return 2; + } + } + + /* Process the list of short options. */ + while (*pszOpt) + { + switch (*pszOpt++) + { + case 'w': + g_f16BitWatcomC = true; + break; + + case 'v': + g_cVerbose++; + break; + + case 'V': + printf("%s\n", "$Revision: 155244 $"); + return 0; + + case '?': + case 'h': + printf("usage: %s [options] -o <output> <input1> [input2 ... [inputN]]\n", + argv[0]); + return 0; + } + } + } + else + { + /* + * File to convert. Do the job right away. + */ + rcExit = convertit(argv[i]); + if (rcExit != 0) + break; + } + } + + return rcExit; +} + |