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loader.c
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/***************************************************************************
*
* Copyright (c) 1997, 1998 Timpanogas Research Group, Inc. All Rights
* Reserved.
*
* AUTHOR : Jeff V. Merkey
* FILE : LOADER.C
* DESCRIP : Microsoft Portable Executable Loader for MANOS v1.0
* DATE : February 13, 1998
*
***************************************************************************/
#include "stdarg.h"
#include "stdio.h"
#include "stdlib.h"
#include "ctype.h"
#include "string.h"
#include "kernel.h"
#include "keyboard.h"
#include "screen.h"
#include "types.h"
#include "emit.h"
#include "dos.h"
#include "tss.h"
#include "os.h"
#include "mps.h"
#include "hal.h"
#include "timer.h"
#include "peexe.h"
#include "extrnvar.h"
#include "line.h"
#include "loader.h"
#include "malloc.h"
#include "free.h"
#include "dosfile.h"
#include "ifs.h"
#include "event.h"
#include "exports.h"
#define VERBOSE 0
#define MULTI_LOAD 1
#define MAX_ARGUMENTS 64
#define COMMANDLINE_LEN 256
extern LONG BaseSegment;
extern LONG CodeSegment;
extern LONG CodeRVA;
extern LONG DataSegment;
extern LONG RelocSegment;
extern LONG DebugSegment;
extern LONG DebugSize;
extern LONG ExportSegment;
extern LONG ExportSize;
extern LONG ExportRVA;
extern LONG LoaderCodeSegment;
extern LONG LoaderDataSegment;
extern LONG StartOfHighMemory;
extern LONG HighMemoryLength;
extern LONG StartupMemory;
extern LONG StartupLength;
extern LONG StartOfLowMemory;
extern LONG LowMemoryLength;
MODULE_HANDLE serverModuleHandle;
MODULE_HANDLE loaderModuleHandle;
MODULE_HANDLE *moduleListHead = 0;
MODULE_HANDLE *moduleListTail = 0;
LONG moduleListMutex = 0;
LONG moduleIDs = 1;
LONG NumberOfModules = 0;
void remove_module(MODULE_HANDLE *module);
void insert_module(MODULE_HANDLE *module);
void RemoveModuleReferences(MODULE_HANDLE *module);
#define FN_DRIVE 0x01
#define FN_DIRECTORY 0x02
#define FN_EXTENSION 0x04
#define FN_WILDCARDS 0x08
#define FN_FILENAME 0x10
BYTE *max_ptr(BYTE *p1, BYTE *p2)
{
if (p1 > p2)
return p1;
else
return p2;
}
LONG filenameSplit(BYTE *path, BYTE *drive, BYTE *dir, BYTE *name, BYTE *ext)
{
register LONG flags = 0, len;
BYTE *pp, *pe;
pp = path;
if ((isalpha(*pp) || strchr("[\\]^_`", *pp)) && (pp[1] == ':'))
{
flags |= FN_DRIVE;
if (drive)
{
strncpy(drive, pp, 2);
drive[2] = '\0';
}
pp += 2;
}
pe = max_ptr(strrchr(pp, '\\'), strrchr(pp, '/'));
if (pe)
{
flags |= FN_DIRECTORY;
pe++;
len = pe - pp;
if (dir)
{
strncpy(dir, pp, len);
dir[len] = '\0';
}
pp = pe;
}
else
pe = pp;
// Special case: "c:/path/." or "c:/path/.."
// These mean FILENAME, not EXTENSION.
while (*pp == '.')
++pp;
if (pp > pe)
{
flags |= FN_FILENAME;
if (name)
{
len = pp - pe;
strncpy(name, pe, len);
name[len] = '\0';
}
}
pe = strrchr(pp, '.');
if (pe)
{
flags |= FN_EXTENSION;
if (ext)
strcpy(ext, pe);
}
else
pe = strchr( pp, '\0');
if (pp != pe)
{
flags |= FN_FILENAME;
len = pe - pp;
if (name)
{
strncpy(name, pp, len);
name[len] = '\0';
}
}
if (strcspn(path, "*?[") < strlen(path))
flags |= FN_WILDCARDS;
return flags;
}
LONG ExitModule(MODULE_HANDLE *module)
{
EXPORT *export, *exportList;
if (module->exitProcedure)
(module->exitProcedure)(module);
RemoveModuleReferences(module);
RemoveModuleExports(module);
if (module->DebugSegmentPtr)
ModuleFreeSymbolTable(module);
remove_module(module);
if (module->BaseAddress)
free((void *)module->BaseAddress);
kfree((void *)module);
return 0;
}
void _moduleInit(MODULE_HANDLE *module)
{
register BYTE *p;
register LONG argc, count;
BYTE *argv[MAX_ARGUMENTS];
count = argc = 0;
argv[0] = (BYTE *) 0;
p = (BYTE *) module->commandLine;
while (*p && argc < MAX_ARGUMENTS && count < COMMANDLINE_LEN)
{
while (*p && *p == ' ' && count < COMMANDLINE_LEN)
{
p++;
count++;
}
if (*p)
{
argv[argc++] = p;
while (*p && *p != ' ' && count < COMMANDLINE_LEN)
{
p++;
count++;
}
*p++ = '\0';
}
}
(module->entryPoint)(argc, argv, (LONG)module);
ExitModule(module);
}
MODULE_HANDLE *GetModuleHandleFromValue(LONG value)
{
register LONG i;
register MODULE_HANDLE *module;
module = moduleListHead;
for (i=0; i < NumberOfModules && module; i++)
{
if (value >= module->ModuleStart && value <= module->ModuleEnd)
return module;
module = module->next;
if (!module)
break;
}
return 0;
}
MODULE_HANDLE *GetPreviousModuleHandle(MODULE_HANDLE *module)
{
register LONG i, value;
register MODULE_HANDLE *previousModule;
previousModule = moduleListHead;
value = ((LONG)module->ModuleStart - 1);
for (i=0; i < NumberOfModules && previousModule; i++)
{
if (value >= previousModule->ModuleStart &&
value <= previousModule->ModuleEnd)
return previousModule;
previousModule = previousModule->next;
if (!previousModule)
break;
}
return module;
}
MODULE_HANDLE *GetNextModuleHandle(MODULE_HANDLE *module)
{
register LONG i, value;
register MODULE_HANDLE *nextModule;
nextModule = moduleListHead;
value = ((LONG)module->ModuleEnd + 1);
for (i=0; i < NumberOfModules && nextModule; i++)
{
if (value >= nextModule->ModuleStart &&
value <= nextModule->ModuleEnd)
return nextModule;
nextModule = nextModule->next;
if (!nextModule)
break;
}
return module;
}
MODULE_HANDLE *GetModuleHandleFromName(BYTE *name)
{
register LONG i;
register MODULE_HANDLE *module;
module = moduleListHead;
for (i=0; i < NumberOfModules && module; i++)
{
if (!stricmp(module->ModuleShortName, name))
return module;
module = module->next;
if (!module)
break;
}
return 0;
}
void InitializeModuleList(void)
{
MODULE_HANDLE *module = &serverModuleHandle;
SetData((LONG *) module, 0, sizeof(MODULE_HANDLE));
module->ModuleID = moduleIDs++;
module->ModuleSignature = MODULE_SIGNATURE;
strcpy(module->ModuleName, "MANOS Operating System");
strcpy(module->ModuleShortName, "MANOS32.DLL");
module->ModuleNameLength = strlen(module->ModuleName);
module->ModuleShortNameLength = strlen(module->ModuleShortName);
module->PEBase = BaseSegment;
module->BaseAddress = BaseSegment;
module->BaseSize = StartOfHighMemory - CodeSegment;
module->ModuleStart = module->BaseAddress;
module->ModuleEnd = module->BaseAddress + module->BaseSize;
module->CodeSegmentPtr = CodeSegment;
module->CodeSegmentSize = DataSegment - CodeSegment;
module->DataSegmentPtr = DataSegment;
module->DataSegmentSize = RelocSegment - DataSegment;
module->RelocSegmentPtr = RelocSegment;
module->RelocSegmentSize = DebugSegment - RelocSegment;
module->ExportSegmentPtr = ExportSegment;
module->ExportDirectory = ExportSegment;
module->ExportSegmentSize = ExportSize;
module->DebugSegmentPtr = DebugSegment;
module->DebugSegmentSize = DebugSize;
module->InitSegmentPtr = 0;
module->InitSegmentSize = 0;
module->ImportSegmentPtr = 0;
module->ImportSegmentSize = 0;
module->entryPoint = (LONG (*)(LONG, BYTE **, LONG)) CodeSegment;
module->exitProcedure = (LONG (*)(MODULE_HANDLE *)) ExitOS;
module->unloadProcedure = (LONG (*)(MODULE_HANDLE *)) ExitOS;
module->defaultProcess = (PROCESS *) &idle_p[0];
// inititlalize debugger segment index table for OS
module->NumberOfSections = module->SectionNumber = 4;
module->SegmentIndexTable[1] = module->CodeSegmentPtr;
module->SegmentIndexTable[2] = module->DataSegmentPtr;
module->SegmentIndexTable[3] = module->RelocSegmentPtr;
module->SegmentIndexTable[4] = module->DebugSegmentPtr;
module->SegmentTypeTable[1] = IMAGE_SCN_CNT_CODE | IMAGE_SCN_MEM_EXECUTE | IMAGE_SCN_MEM_READ ;
module->SegmentTypeTable[2] = IMAGE_SCN_CNT_INITIALIZED_DATA | IMAGE_SCN_MEM_WRITE | IMAGE_SCN_MEM_READ ;
module->SegmentTypeTable[3] = IMAGE_SCN_CNT_INITIALIZED_DATA | IMAGE_SCN_MEM_SHARED | IMAGE_SCN_MEM_READ | IMAGE_SCN_MEM_DISCARDABLE;
module->SegmentTypeTable[4] = IMAGE_SCN_CNT_INITIALIZED_DATA | IMAGE_SCN_MEM_SHARED | IMAGE_SCN_MEM_READ;
module->SegmentLengthTable[1] = module->CodeSegmentSize;
module->SegmentLengthTable[2] = module->DataSegmentSize;
module->SegmentLengthTable[3] = module->RelocSegmentSize;
module->SegmentLengthTable[4] = module->DebugSegmentSize;
module->resourceHead = module->resourceTail = 0;
module->resourceLock = module->resourceNum = 0;
module->extHead = module->extTail = 0;
module->ExternalReferenceLock = module->ExternalReferenceCount = 0;
module->intHead = module->intTail = 0;
module->InternalReferenceLock = module->InternalReferenceCount = 0;
insert_module(module);
return;
}
void remove_module(MODULE_HANDLE *module)
{
register MODULE_HANDLE *search;
register LONG flags;
flags = get_flags();
spin_lock(&moduleListMutex);
search = moduleListHead;
while (search)
{
if (search == module)
{
if (moduleListHead == module)
{
moduleListHead = (void *) module->next;
if (moduleListHead)
moduleListHead->prior = NULL;
else
moduleListTail = NULL;
}
else
{
module->prior->next = module->next;
if (module != moduleListTail)
module->next->prior = module->prior;
else
moduleListTail = module->prior;
}
}
search = search->next;
}
if (NumberOfModules)
NumberOfModules--;
spin_unlock(&moduleListMutex);
set_flags(flags);
EventNotify(EVENT_UNLOAD_MODULE, (LONG) module);
return;
}
void insert_module(MODULE_HANDLE *module)
{
register MODULE_HANDLE *search;
register LONG flags;
EventNotify(EVENT_LOAD_MODULE, (LONG) module);
flags = get_flags();
spin_lock(&moduleListMutex);
search = moduleListHead;
while (search)
{
if (search == module)
{
spin_unlock(&moduleListMutex);
set_flags(flags);
return;
}
search = search->next;
}
if (!moduleListHead)
{
moduleListHead = module;
moduleListTail = module;
module->next = module->prior = 0;
}
else
{
moduleListTail->next = module;
module->next = 0;
module->prior = moduleListTail;
moduleListTail = module;
}
NumberOfModules++;
spin_unlock(&moduleListMutex);
set_flags(flags);
return;
}
void DisplayModule(SCREEN *screen, LONG attr, LONG address)
{
register LONG retCode;
register MODULE_HANDLE *module;
register LONG i, j;
typedef struct
{
DWORD flag;
LPSTR name;
} DWORD_FLAG_DESCRIPTIONS;
DWORD_FLAG_DESCRIPTIONS SectionCharacteristics[] =
{
{ IMAGE_SCN_CNT_CODE, "CODE" },
{ IMAGE_SCN_CNT_INITIALIZED_DATA, "INITIALIZED_DATA" },
{ IMAGE_SCN_CNT_UNINITIALIZED_DATA, "UNINITIALIZED_DATA" },
{ IMAGE_SCN_LNK_INFO, "LNK_INFO" },
{ IMAGE_SCN_LNK_OVERLAY, "LNK_OVERLAY" },
{ IMAGE_SCN_LNK_REMOVE, "LNK_REMOVE" },
{ IMAGE_SCN_LNK_COMDAT, "LNK_COMDAT" },
{ IMAGE_SCN_MEM_DISCARDABLE, "MEM_DISCARDABLE" },
{ IMAGE_SCN_MEM_NOT_CACHED, "MEM_NOT_CACHED" },
{ IMAGE_SCN_MEM_NOT_PAGED, "MEM_NOT_PAGED" },
{ IMAGE_SCN_MEM_SHARED, "MEM_SHARED" },
{ IMAGE_SCN_MEM_EXECUTE, "MEM_EXECUTE" },
{ IMAGE_SCN_MEM_READ, "MEM_READ" },
{ IMAGE_SCN_MEM_WRITE, "MEM_WRITE" },
};
#define NUMBER_SECTION_CHARACTERISTICS (sizeof(SectionCharacteristics) / sizeof(DWORD_FLAG_DESCRIPTIONS))
extern LONG validate_address(LONG);
retCode = validate_address(address);
if (retCode)
{
switch (retCode)
{
case (LONG) -1:
printfScreenWithAttribute(screen, attr, "invalid address given\n");
return;
case 1:
printfScreenWithAttribute(screen, attr, "address paged out\n");
return;
default:
printfScreenWithAttribute(screen, attr, "invalid address (%d)\n", retCode);
return;
}
}
module = (MODULE_HANDLE *) address;
if (module->ModuleSignature != MODULE_SIGNATURE)
{
printfScreenWithAttribute(screen, attr, "invalid module signature\n");
return;
}
SetPauseMode(screen, screen->nLines - 3);
printfScreenWithAttribute(screen,
attr,
"%s :: %08X\n",
module->ModuleName, module);
printfScreenWithAttribute(screen,
attr,
" Short Name : %s Entry : %08X Size : %08X\n",
module->ModuleShortName,
module->entryPoint,
module->BaseSize);
printfScreenWithAttribute(screen,
attr,
" Range : %08X-%08X BaseRVA : %08X\n",
module->ModuleStart,
module->ModuleEnd,
module->PEBase);
printfScreenWithAttribute(screen,
attr,
" Import Directory : %08X Export Directory : %08X\n",
module->ImportDirectory,
module->ExportDirectory);
if (module->CodeSegmentSize)
printfScreenWithAttribute(screen,
attr,
" Code Segment : %08X Code Size : (%08X) %d bytes\n",
module->CodeSegmentPtr,
module->CodeSegmentSize,
module->CodeSegmentSize);
if (module->DataSegmentSize)
printfScreenWithAttribute(screen,
attr,
" Data Segment : %08X Data Size : (%08X) %d bytes\n",
module->DataSegmentPtr,
module->DataSegmentSize,
module->DataSegmentSize);
if (module->RelocSegmentSize)
printfScreenWithAttribute(screen,
attr,
" Reloc Segment : %08X Reloc Size : (%08X) %d bytes\n",
module->RelocSegmentPtr,
module->RelocSegmentSize,
module->RelocSegmentSize);
if (module->InitSegmentSize)
printfScreenWithAttribute(screen,
attr,
" Init Segment : %08X Init Size : (%08X) %d bytes\n",
module->InitSegmentPtr,
module->InitSegmentSize,
module->InitSegmentSize);
if (module->ImportSegmentSize)
printfScreenWithAttribute(screen,
attr,
" Import Segment : %08X Import Size : (%08X) %d bytes\n",
module->ImportSegmentPtr,
module->ImportSegmentSize,
module->ImportSegmentSize);
if (module->ExportSegmentSize)
printfScreenWithAttribute(screen,
attr,
" Export Segment : %08X Export Size : (%08X) %d bytes\n",
module->ExportSegmentPtr,
module->ExportSegmentSize,
module->ExportSegmentSize);
if (module->SharedSegmentSize)
printfScreenWithAttribute(screen,
attr,
" Shared Segment : %08X Shared Size : (%08X) %d bytes\n",
module->SharedSegmentPtr,
module->SharedSegmentSize,
module->SharedSegmentSize);
if (module->RPCSegmentSize)
printfScreenWithAttribute(screen,
attr,
" RPC Segment : %08X RPC Size : (%08X) %d bytes\n",
module->RPCSegmentPtr,
module->RPCSegmentSize,
module->RPCSegmentSize);
if (module->ResourceSegmentSize)
printfScreenWithAttribute(screen,
attr,
" Resrce Segment : %08X Resrce Size : (%08X) %d bytes\n",
module->ResourceSegmentPtr,
module->ResourceSegmentSize,
module->ResourceSegmentSize);
if (module->DebugSegmentSize)
printfScreenWithAttribute(screen,
attr,
" Debug Segment : %08X Debug Size : (%08X) %d bytes\n",
module->DebugSegmentPtr,
module->DebugSegmentSize,
module->DebugSegmentSize);
printfScreenWithAttribute(screen,
attr,
"\n-------------- Section Table ----------------\n");
for (i=0; i < module->SectionNumber && i < 32; i++)
{
printfScreenWithAttribute(screen,
attr,
"Section %i : %08X Len: %08X ",
i,
module->SegmentIndexTable[i + 1],
module->SegmentLengthTable[i + 1]);
for (j=0; j < NUMBER_SECTION_CHARACTERISTICS; j++)
{
if (module->SegmentTypeTable[i + 1] & SectionCharacteristics[j].flag)
printfScreenWithAttribute(screen, attr, " %s", SectionCharacteristics[j].name);
}
printfScreen(screen, "\n");
}
printfScreenWithAttribute(screen,
attr,
"\n--------------- Source Debug Table ----------------\n");
printfScreenWithAttribute(screen, attr, "sourceIndex -> %08X ", module->sourceIndex);
printfScreenWithAttribute(screen, attr, "SourceNumber -> %08X\n", module->SourceNumber);
printfScreenWithAttribute(screen, attr, "ModuleNumber -> %08X ", module->ModuleNumber);
printfScreenWithAttribute(screen, attr, "SourceIndex -> %08X\n", module->SourceIndex);
printfScreenWithAttribute(screen, attr, "ModuleIndex -> %08X ", module->ModuleIndex);
printfScreenWithAttribute(screen, attr, "NameSection -> %08X\n", module->NameSection);
printfScreenWithAttribute(screen, attr, "NumberOfSymbols -> %08X ", module->NumberOfSymbols);
printfScreenWithAttribute(screen, attr, "NumberOfNames -> %08X\n", module->NumberOfNames);
printfScreenWithAttribute(screen, attr, "NumberOfSections -> %08X ", module->NumberOfSections);
printfScreenWithAttribute(screen, attr, "DebugSymbolVersion -> %08X\n", module->DebugSymbolVersion);
printfScreenWithAttribute(screen, attr, "GlobalSymbolTable -> %08X ", module->GlobalSymbolTable);
printfScreenWithAttribute(screen, attr, "GlobalTypeTable -> %08X\n", module->GlobalTypeTable);
printfScreenWithAttribute(screen, attr, "DebugBaseAddress -> %08X ", module->DebugBaseAddress);
printfScreenWithAttribute(screen, attr, "ModuleIndexTable -> %08X\n", module->ModuleIndexTable);
printfScreenWithAttribute(screen, attr, "SourceIndexTable -> %08X ", module->SourceIndexTable);
printfScreenWithAttribute(screen, attr, "NameIndexTable -> %08X\n", module->NameIndexTable);
printfScreenWithAttribute(screen, attr, "SymbolIndexTable -> %08X ", module->SymbolIndexTable);
printfScreenWithAttribute(screen, attr, "SourceCodeIndex -> %08X\n", module->SourceCodeIndex);
printfScreenWithAttribute(screen, attr, "SourceLineIndex -> %08X ", module->SourceLineIndex);
printfScreenWithAttribute(screen, attr, "SourceSizeIndex -> %08X\n", module->SourceSizeIndex);
printfScreenWithAttribute(screen, attr, "crossIndex -> %08X ", module->crossIndex);
printfScreenWithAttribute(screen, attr, "defaultProcess -> %08X\n", module->defaultProcess);
printfScreenWithAttribute(screen,
attr,
"\n--------------- Import Reference Lists ----------------\n");
printfScreenWithAttribute(screen, attr, "external head -> %08X ", module->extHead);
printfScreenWithAttribute(screen, attr, "external tail -> %08X\n", module->extTail);
printfScreenWithAttribute(screen, attr, "external lock -> %08X ", module->ExternalReferenceLock);
printfScreenWithAttribute(screen, attr, "external count -> %08X\n", module->ExternalReferenceCount);
printfScreenWithAttribute(screen, attr, "internal head -> %08X ", module->intHead);
printfScreenWithAttribute(screen, attr, "internal tail -> %08X\n", module->intTail);
printfScreenWithAttribute(screen, attr, "external lock -> %08X ", module->InternalReferenceLock);
printfScreenWithAttribute(screen, attr, "external count -> %08X\n", module->InternalReferenceCount);
ClearPauseMode(screen);
return;
}
void DisplayModuleMap(SCREEN *screen, LONG attr, LONG extendedInfo)
{
MODULE_HANDLE *module;
SetPauseMode(screen, screen->nLines - 3);
module = moduleListHead;
while (module)
{
if (printfScreenWithAttribute(screen,
attr,
"%s :: %08X\n",
module->ModuleName, module))
break;
printfScreenWithAttribute(screen,
attr,
" Short Name : %s Entry : %08X Size : %08X\n",
module->ModuleShortName,
module->entryPoint,
module->BaseSize);
printfScreenWithAttribute(screen,
attr,
" Range : %08X-%08X BaseRVA : %08X\n",
module->ModuleStart,
module->ModuleEnd,
module->PEBase);
printfScreenWithAttribute(screen,
attr,
" Import Directory : %08X Export Directory : %08X\n",
module->ImportDirectory,
module->ExportDirectory);
if (module->CodeSegmentSize)
printfScreenWithAttribute(screen,
attr,
" Code Segment : %08X Code Size : (%08X) %d bytes\n",
module->CodeSegmentPtr,
module->CodeSegmentSize,
module->CodeSegmentSize);
if (module->DataSegmentSize)
printfScreenWithAttribute(screen,
attr,
" Data Segment : %08X Data Size : (%08X) %d bytes\n",
module->DataSegmentPtr,
module->DataSegmentSize,
module->DataSegmentSize);
if (extendedInfo)
{
if (module->RelocSegmentSize)
printfScreenWithAttribute(screen,
attr,
" Reloc Segment : %08X Reloc Size : (%08X) %d bytes\n",
module->RelocSegmentPtr,
module->RelocSegmentSize,
module->RelocSegmentSize);
if (module->InitSegmentSize)
printfScreenWithAttribute(screen,
attr,
" Init Segment : %08X Init Size : (%08X) %d bytes\n",
module->InitSegmentPtr,
module->InitSegmentSize,
module->InitSegmentSize);
if (module->ImportSegmentSize)
printfScreenWithAttribute(screen,
attr,
" Import Segment : %08X Import Size : (%08X) %d bytes\n",
module->ImportSegmentPtr,
module->ImportSegmentSize,
module->ImportSegmentSize);
if (module->ExportSegmentSize)
printfScreenWithAttribute(screen,
attr,
" Export Segment : %08X Export Size : (%08X) %d bytes\n",
module->ExportSegmentPtr,
module->ExportSegmentSize,
module->ExportSegmentSize);
if (module->SharedSegmentSize)
printfScreenWithAttribute(screen,
attr,
" Shared Segment : %08X Shared Size : (%08X) %d bytes\n",
module->SharedSegmentPtr,
module->SharedSegmentSize,
module->SharedSegmentSize);
if (module->RPCSegmentSize)
printfScreenWithAttribute(screen,
attr,
" RPC Segment : %08X RPC Size : (%08X) %d bytes\n",
module->RPCSegmentPtr,
module->RPCSegmentSize,
module->RPCSegmentSize);
if (module->ResourceSegmentSize)
printfScreenWithAttribute(screen,
attr,
" Resrce Segment : %08X Resrce Size : (%08X) %d bytes\n",
module->ResourceSegmentPtr,
module->ResourceSegmentSize,
module->ResourceSegmentSize);
if (module->DebugSegmentSize)
printfScreenWithAttribute(screen,
attr,
" Debug Segment : %08X Debug Size : (%08X) %d bytes\n",
module->DebugSegmentPtr,
module->DebugSegmentSize,
module->DebugSegmentSize);
}
module = module->next;
}
ClearPauseMode(screen);
}
void RemoveModuleReferences(MODULE_HANDLE *module)
{
register MODULE_HANDLE *importModule;
register IMPORT *importList, *import;
register LONG flags;
flags = get_flags();
spin_lock(&module->InternalReferenceLock);
import = module->intHead;
while (import)
{
importList = import->importedNext;
importModule = import->providerModuleContext;
if (module->intHead == import)
{
module->intHead = (void *) import->importedNext;
if (module->intHead)
module->intHead->importedPrior = NULL;
else
module->intTail = NULL;
}
else
{
import->importedPrior->importedNext = import->importedNext;
if (import != module->intTail)
import->importedNext->importedPrior = import->importedPrior;
else
module->intTail = import->importedPrior;
}
if (module->InternalReferenceCount)
module->InternalReferenceCount--;
spin_lock(&importModule->ExternalReferenceLock);
if (importModule->extHead == import)
{
importModule->extHead = (void *) import->providerNext;
if (importModule->extHead)
importModule->extHead->providerPrior = NULL;
else
importModule->extTail = NULL;
}
else
{
import->providerPrior->providerNext = import->providerNext;
if (import != importModule->extTail)
import->providerNext->providerPrior = import->providerPrior;
else
importModule->extTail = import->providerPrior;
}
if (importModule->ExternalReferenceCount)
importModule->ExternalReferenceCount--;
spin_unlock(&importModule->ExternalReferenceLock);
kfree(import);
import = importList;
}
spin_unlock(&module->InternalReferenceLock);
set_flags(flags);
return;
}
LONG AddImportReference(MODULE_HANDLE *module,
MODULE_HANDLE *importModule,
EXPORT *exportRecord,
LONG exportValue)
{
register LONG retCode, flags;
IMPORT *import;
import = (IMPORT *) kmalloc(sizeof(IMPORT));
if (!import)
return (-1);
SetData((LONG *)import, 0, sizeof(IMPORT));
import->providerModuleContext = importModule;
import->importedModuleContext = module;
import->referenceObject = exportRecord;
import->referenceAddress = exportValue;
flags = get_flags();
spin_lock(&module->InternalReferenceLock);
if (!module->intHead)
{
module->intHead = import;
module->intTail = import;
import->importedNext = import->importedPrior = 0;
}
else
{
module->intTail->importedNext = import;
import->importedNext = 0;
import->importedPrior = module->intTail;
module->intTail = import;
}
module->InternalReferenceCount++;
spin_unlock(&module->InternalReferenceLock);
spin_lock(&importModule->ExternalReferenceLock);
if (!importModule->extHead)
{
importModule->extHead = import;
importModule->extTail = import;
import->providerNext = import->providerPrior = 0;
}
else
{
importModule->extTail->providerNext = import;
import->providerNext = 0;
import->providerPrior = importModule->extTail;
importModule->extTail = import;
}
importModule->ExternalReferenceCount++;
spin_unlock(&importModule->ExternalReferenceLock);
set_flags(flags);
return (LONG) 0;
}
LONG CheckModuleReferences(SCREEN *screen, MODULE_HANDLE *module)
{
register LONG i, flags;
register IMPORT *import;
register MODULE_HANDLE *moduleTarget, *lastModule = 0;
flags = get_flags();
spin_lock(&module->ExternalReferenceLock);
if (module->ExternalReferenceCount)
{
import = module->extHead;
while (import)
{
moduleTarget = import->importedModuleContext;
if (moduleTarget != lastModule)
{
printfScreen(screen,
"Module %s is being referenced by Module %s\n",
module->ModuleShortName,
moduleTarget->ModuleShortName);
lastModule = moduleTarget;
}
import = import->providerNext;
}
spin_unlock(&module->ExternalReferenceLock);
set_flags(flags);
return (LONG) -2;
}
spin_unlock(&module->ExternalReferenceLock);
set_flags(flags);
return (LONG) 0;
}
LONG UnloadFile(BYTE *name)
{
register SCREEN *screen = activeScreen;
register LONG key, retCode;
MODULE_HANDLE *module;
EXPORT *export, *exportList;
module = GetModuleHandleFromName(name);
if (!module)
return -1;
retCode = CheckModuleReferences(screen, module);
if (retCode)
return (retCode);
if (module->warnProcedure)
{
if ((module->warnProcedure)(module))
{
printfScreen(screen, "\nUnload Module? <y/n> ");
key = ReadKeyboard(screen);