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eudora-mac/dflutils.c

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/* Copyright (c) 2017, Computer History Museum
All rights reserved.
Redistribution and use in source and binary forms, with or without modification, are permitted (subject to
the limitations in the disclaimer below) provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
disclaimer in the documentation and/or other materials provided with the distribution.
* Neither the name of Computer History Museum nor the names of its contributors may be used to endorse or promote products
derived from this software without specific prior written permission.
NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE
COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
DAMAGE. */
#include "CodeFragmentsSupplement.h"
#include "dflutils.h"
#include "dflsuppl.h"
#define FILE_NUM 110
#pragma segment LDAPUtils
// Since Apple, in their infinite wisdom, obsoleted this identifier,
// and provided nothing to replace it.....
enum { kNoConnectionID = 0 };
#if GENERATING68KSEGLOAD
#define USEDFLSTUBLOADER 1
#else
#define USEDFLSTUBLOADER 0
#endif
enum {
kCFM68KFileType = 'INIT',
kCFM68KCreatorType = 'cfm8'
};
enum {
kRsrcModOverrideRsrcType = 'DFLS',
kRsrcModOverrideRsrcID = 129
};
#if USEDFLSTUBLOADER
#define DFLStubSharedLibName "\pDFLStubLib"
static RoutineDescriptorPtr DFLStub_GetSharedLibraryUPP = nil;
static RoutineDescriptorPtr DFLStub_CloseConnectionUPP = nil;
static CFragConnectionID DFLStubLibConnID = kNoConnectionID;
static Boolean DFLStubLibLoaded = false;
#if GENERATING68KSEGLOAD
#pragma mpwc on
#endif
typedef pascal OSErr (*DFLStub_GetSharedLibraryProcPtr)(ConstStr63Param libName, OSType archType, CFragLoadOptions loadFlags, CFragConnectionID *connID, Ptr *mainAddr, Str255 errMessage);
typedef pascal OSErr (*DFLStub_CloseConnectionProcPtr)(CFragConnectionID *connID);
#define DFLStub_GetSharedLibrary(libName, archType, loadFlags, connID, mainAddr, errMessage) (*(DFLStub_GetSharedLibraryProcPtr)DFLStub_GetSharedLibraryUPP)((libName), (archType), (loadFlags), (connID), (mainAddr), (errMessage))
#define DFLStub_CloseConnection(connID) (*(DFLStub_CloseConnectionProcPtr)DFLStub_CloseConnectionUPP)(connID)
#if GENERATING68KSEGLOAD
#pragma mpwc reset
#endif
OSErr LoadDFLStubLib(OSType libArchType);
OSErr UnloadDFLStubLib(void);
#endif
#if USEDFLSTUBLOADER
Boolean useDFLStubLib = true;
#else
Boolean useDFLStubLib = false;
#endif
static CFragConnectionID curDFRLibConnID = (void *)kNoConnectionID;
static ISAType curDFRLibISA = kOld68kRTA | kM68kISA;
static OSErr curDFRProcInitErr = paramErr;
void ResetDFRLoaderGlobals(void)
{
curDFRLibConnID = (void *)kNoConnectionID;
curDFRLibISA = kOld68kRTA | kM68kISA;
curDFRProcInitErr = paramErr;
}
void SetDFRLoaderGlobals(CFragConnectionID connID, ISAType connISA)
{
curDFRLibConnID = connID;
curDFRLibISA = connISA;
curDFRProcInitErr = noErr;
}
OSErr DFRLoaderErr(void)
{
return curDFRProcInitErr;
}
static void SetDFRRoutineDescriptor(RoutineDescriptorPtr routineRD, ProcInfoType procInfo, Ptr procAddr, ISAType procISA)
{
if (!routineRD)
return;
/* FINISH *//* just set most of these fields during initial RD declaration */
routineRD->goMixedModeTrap = _MixedModeMagic;
routineRD->version = kRoutineDescriptorVersion;
routineRD->routineDescriptorFlags = kSelectorsAreNotIndexable;
routineRD->reserved1 = 0;
routineRD->reserved2 = 0;
routineRD->selectorInfo = 0;
routineRD->routineCount = 0;
routineRD->routineRecords[0].procInfo = procInfo;
routineRD->routineRecords[0].reserved1 = 0;
routineRD->routineRecords[0].ISA = procISA;
routineRD->routineRecords[0].routineFlags = kProcDescriptorIsAbsolute | kFragmentIsPrepared | kUseNativeISA;
routineRD->routineRecords[0].procDescriptor = (ProcPtr)procAddr;
routineRD->routineRecords[0].reserved2 = 0;
routineRD->routineRecords[0].selector = 0;
}
static void CopyCStrToPStr(unsigned char* theCString, Str255 thePString)
{
unsigned char* src;
unsigned char* dst;
long len;
len = 0;
src = theCString;
dst = thePString + 1;
while (*src && len < 255)
{
*dst++ = *src++;
len++;
}
*thePString = len;
}
OSErr InitDFR(char* symbolNameCStr, RoutineDescriptorPtr routineRD, ProcInfoType procInfo)
{
OSErr err;
Str255 symbolName;
Ptr symbolAddr;
CFragSymbolClass symbolClass;
if (curDFRProcInitErr)
return curDFRProcInitErr;
if (!routineRD || !symbolNameCStr || !*symbolNameCStr || (curDFRLibConnID == (CFragConnectionID)kNoConnectionID))
{
err = paramErr;
goto Error;
}
CopyCStrToPStr((unsigned char*)symbolNameCStr, symbolName);
err = FindSymbol(curDFRLibConnID, symbolName, &symbolAddr, &symbolClass);
if (err)
goto Error;
if ((long)symbolAddr == kUnresolvedCFragSymbolAddress)
{
err = cfragNoSymbolErr;
goto Error;
}
if (symbolClass != kTVectorCFragSymbol)
{
err = cfragNoSymbolErr;
goto Error;
}
SetDFRRoutineDescriptor(routineRD, procInfo, symbolAddr, curDFRLibISA);
return noErr;
Error:
curDFRProcInitErr = err;
return err;
}
void InvalDFR(RoutineDescriptorPtr routineRD)
{
if (!routineRD)
return;
/* FINISH *//* just set most of these fields during initial RD declaration */
routineRD->goMixedModeTrap = 0xA89F; // _Unimplemented;
routineRD->version = kRoutineDescriptorVersion;
routineRD->routineDescriptorFlags = kSelectorsAreNotIndexable;
routineRD->reserved1 = 0;
routineRD->reserved2 = 0;
routineRD->selectorInfo = 0;
routineRD->routineCount = 0;
routineRD->routineRecords[0].procInfo = 0;
routineRD->routineRecords[0].reserved1 = 0;
routineRD->routineRecords[0].ISA = kOld68kRTA | kM68kISA;
routineRD->routineRecords[0].routineFlags = kProcDescriptorIsAbsolute | kFragmentIsPrepared | kUseNativeISA;
routineRD->routineRecords[0].procDescriptor = (ProcPtr)0;
routineRD->routineRecords[0].reserved2 = 0;
routineRD->routineRecords[0].selector = 0;
}
static OSErr GetSysNativeISA(ISAType *nativeISA)
{
OSErr err;
long response;
err = Gestalt(gestaltSysArchitecture, &response);
if (err)
{
err = Gestalt(gestaltNativeCPUtype, &response);
if (err)
return err;
if ((response >= 0) && (response < 0x0100))
*nativeISA = kM68kISA;
else if ((response >= 0x0100) && (response < 0x0200))
*nativeISA = kPowerPCISA;
else
return paramErr;
return noErr;
}
switch (response)
{
case gestalt68k:
*nativeISA = kM68kISA;
break;
case gestaltPowerPC:
*nativeISA = kPowerPCISA;
break;
default:
return paramErr;
}
return noErr;
}
static OSErr GetCFM68KVers(long *vers)
{
OSErr err;
short extFldrVRefNum;
long extFldrDirID;
CInfoPBRec catInfo;
Str255 fileName;
short index;
Boolean found;
long parID;
short origResFile;
short initRefNum;
Handle versHdl;
long longVersNum;
*vers = 0;
err = FindFolder(kOnSystemDisk, kExtensionFolderType, kDontCreateFolder, &extFldrVRefNum, &extFldrDirID);
if (err)
return err;
catInfo.hFileInfo.ioNamePtr = fileName;
catInfo.hFileInfo.ioVRefNum = extFldrVRefNum;
err = noErr;
found = false;
index = 0;
while (!found && !err)
{
index++;
catInfo.hFileInfo.ioFDirIndex = index;
catInfo.hFileInfo.ioDirID = extFldrDirID;
err = PBGetCatInfoSync(&catInfo);
if (err)
continue;
if (catInfo.hFileInfo.ioFlAttrib & ioDirMask)
continue;
if ((catInfo.hFileInfo.ioFlFndrInfo.fdType == kCFM68KFileType) && (catInfo.hFileInfo.ioFlFndrInfo.fdCreator == kCFM68KCreatorType))
found = true;
}
if (err)
return err;
if (!found)
return fnfErr;
parID = catInfo.hFileInfo.ioFlParID;
origResFile = CurResFile();
initRefNum = HOpenResFile(extFldrVRefNum, parID, fileName, fsRdWrPerm);
err = ResError();
if (err)
return err;
versHdl = Get1Resource('vers', 1);
err = ResError();
if (!err && (!versHdl || !*versHdl))
err = resNotFound;
if (!err && (GetHandleSize(versHdl) < 8))
err = paramErr;
if (err)
{
UseResFile(origResFile);
return err;
}
longVersNum = **(long**)versHdl;
CloseResFile(initRefNum);
err = ResError();
UseResFile(origResFile);
if (err)
return err;
*vers = longVersNum;
return noErr;
}
Boolean CFM68KOkay(void)
{
OSErr err;
long response;
ISAType nativeISA;
err = GetSysNativeISA(&nativeISA);
if (err)
return false;
if (nativeISA != kM68kISA)
return true;
err = Gestalt(gestaltSystemVersion, &response);
if (err)
return false;
if ((response & 0x0000FF00) >= 0x00000800)
return true;
err = GetCFM68KVers(&response);
if (err)
return false;
if ((response & 0xFF000000) < 0x04000000)
return false;
return true;
}
OSErr SystemSupportsDFRLibraries(OSType libArchType)
{
return noErr;
}
#if USEDFLSTUBLOADER
static OSErr LoadDFLStubLib(OSType libArchType)
{
OSErr err, scratchErr;
Ptr mainAddr;
Str255 errName;
Ptr symbolAddr;
CFragSymbolClass symbolClass;
Handle h;
Boolean doFragRsrcMod;
Handle code0Hdl;
short code0ResFile;
short origResFile;
Handle cfrgHdl;
CodeFragRsrcPtr cfrgPtr;
CodeFragInfoRecPtr curFragInfoRecPtr;
long numFrags;
long curFragIndex;
Boolean found;
if (DFLStubLibLoaded)
return noErr;
doFragRsrcMod = false;
h = GetResource(kRsrcModOverrideRsrcType, kRsrcModOverrideRsrcID);
if (h)
{
if (*h && (GetHandleSize(h) == 1))
doFragRsrcMod = **h ? true : false;
ReleaseResource(h);
}
if (doFragRsrcMod)
{
code0Hdl = GetResource('CODE', 0);
err = ResError();
if (!err && (!code0Hdl || !*code0Hdl))
err = resNotFound;
if (err)
return err;
code0ResFile = HomeResFile(code0Hdl);
err = ResError(); /* no error expected */
if (err)
return err;
origResFile = CurResFile();
UseResFile(code0ResFile);
err = ResError(); /* no error expected */
if (err)
return err;
cfrgHdl = Get1Resource(kCFragResourceType, kCFragResourceID);
err = ResError();
UseResFile(origResFile);
if (!err && (!cfrgHdl || !*cfrgHdl))
err = resNotFound;
if (err)
return err;
HNoPurge(cfrgHdl);
HLock(cfrgHdl);
cfrgPtr = (CodeFragRsrcPtr)*cfrgHdl;
if (cfrgPtr->cfrgRsrcVers != kCurrentCfrgRsrcVers)
return paramErr;
numFrags = cfrgPtr->numFragInfoRecs;
found = false;
curFragIndex = 0;
curFragInfoRecPtr = (CodeFragInfoRecPtr)&cfrgPtr->firstFragInfoRec;
while (!found && (curFragIndex < numFrags))
{
if ((curFragInfoRecPtr->fragArch == libArchType) && EqualString(DFLStubSharedLibName, curFragInfoRecPtr->fragName, true, true))
{
found = true;
break;
}
curFragIndex++;
curFragInfoRecPtr = (CodeFragInfoRecPtr)((long)curFragInfoRecPtr + curFragInfoRecPtr->infoRecLen);
}
HUnlock(cfrgHdl);
if (!found)
return paramErr;
curFragInfoRecPtr->fragType = kIsApp;
}
err = GetSharedLibrary(DFLStubSharedLibName, libArchType, kLoadNewCopy, &DFLStubLibConnID, &mainAddr, errName);
if (err)
return err;
err = FindSymbol(DFLStubLibConnID, "\pDFLStub_GetSharedLibraryUPP", &symbolAddr, &symbolClass);
if (err)
goto Error;
if (symbolClass != kDataSym)
{
err = cfragNoSymbolErr;
goto Error;
}
DFLStub_GetSharedLibraryUPP = *(RoutineDescriptorPtr*)symbolAddr;
err = FindSymbol(DFLStubLibConnID, "\pDFLStub_CloseConnectionUPP", &symbolAddr, &symbolClass);
if (err)
goto Error;
if (symbolClass != kDataSym)
{
err = cfragNoSymbolErr;
goto Error;
}
DFLStub_CloseConnectionUPP = *(RoutineDescriptorPtr*)symbolAddr;
DFLStubLibLoaded = true;
return noErr;
Error:
scratchErr = CloseConnection(&DFLStubLibConnID);
if (!scratchErr)
DFLStubLibConnID = kNoConnectionID;
DFLStub_GetSharedLibraryUPP = nil;
DFLStub_CloseConnectionUPP = nil;
return err;
}
#endif
#if USEDFLSTUBLOADER
static OSErr UnloadDFLStubLib(void)
{
OSErr err;
if (!DFLStubLibLoaded)
return noErr;
err = CloseConnection(&DFLStubLibConnID);
if (err)
return err;
DFLStub_GetSharedLibraryUPP = nil;
DFLStub_CloseConnectionUPP = nil;
DFLStubLibConnID = kNoConnectionID;
DFLStubLibLoaded = false;
return noErr;
}
#endif
OSErr LoadDFRLibrary(ConstStr63Param libName, OSType libArchType, CFragConnectionID *connID, Str255 errMessage)
{
OSErr err;
Ptr mainAddr;
Str255 errStr_local;
StringPtr errStrPtr;
ISAType libISA;
#if USEDFLSTUBLOADER
OSErr scratchErr;
#endif
ResetDFRLoaderGlobals();
*connID = (void *)kNoConnectionID;
if (!libName || !*libName || !connID)
return paramErr;
if ((libArchType != kPowerPCCFragArch) && (libArchType != kMotorola68KCFragArch))
if (libArchType == kAnyCFragArch)
{
if (GetCurrentISA() == kPowerPCISA)
libArchType = kPowerPCCFragArch;
else if (GetCurrentISA() == kM68kISA)
libArchType = kMotorola68KCFragArch;
else
return cfragArchitectureErr;
}
else
return cfragArchitectureErr;
err = SystemSupportsDFRLibraries(libArchType);
if (err)
return err;
libISA = (libArchType == kPowerPCCFragArch) ? (kPowerPCISA | kPowerPCRTA) : (kM68kISA | kCFM68kRTA);
errStrPtr = errMessage ? errMessage : errStr_local;
#if USEDFLSTUBLOADER
if (useDFLStubLib)
{
err = LoadDFLStubLib(libArchType);
if (err)
return err;
err = DFLStub_GetSharedLibrary(libName, libArchType, kPrivateCFragCopy, connID, &mainAddr, errStrPtr);
if (err)
{
scratchErr = UnloadDFLStubLib();
return err;
}
}
else
{
err = GetSharedLibrary(libName, libArchType, kPrivateCFragCopy, connID, &mainAddr, errStrPtr);
if (err)
return err;
}
#else
err = GetSharedLibrary(libName, libArchType, kPrivateCFragCopy, connID, &mainAddr, errStrPtr);
if (err)
return err;
#endif
SetDFRLoaderGlobals(*connID, libISA);
return noErr;
}
OSErr UnloadDFRLibrary(CFragConnectionID *connID)
{
OSErr err;
#if USEDFLSTUBLOADER
OSErr scratchErr;
#endif
#if USEDFLSTUBLOADER
if (useDFLStubLib)
err = DFLStub_CloseConnection(connID);
else
err = CloseConnection(connID);
#else
err = CloseConnection(connID);
#endif
if (!err)
*connID = (void *)kNoConnectionID;
#if USEDFLSTUBLOADER
if (!err)
if (useDFLStubLib)
scratchErr = UnloadDFLStubLib();
#endif
return err;
}
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