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--- dyld/dyld-640.2/dyld3/ClosureWriter.cpp
+++ /dev/null
@@ -1,516 +0,0 @@
-/*
- * Copyright (c) 2017 Apple Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
-
-
-#include <stdint.h>
-#include <assert.h>
-#include <uuid/uuid.h>
-#include <unistd.h>
-#include <limits.h>
-#include <mach/vm_page_size.h>
-
-#include "ClosureWriter.h"
-#include "MachOFile.h"
-
-
-namespace dyld3 {
-namespace closure {
-
-
-//////////////////////////// ContainerTypedBytesWriter ////////////////////////////////////////
-
-
-void ContainerTypedBytesWriter::setContainerType(TypedBytes::Type containerType)
-{
- assert(_vmAllocationStart == 0);
- _vmAllocationSize = 1024 * 1024;
- vm_address_t allocationAddr;
- ::vm_allocate(mach_task_self(), &allocationAddr, _vmAllocationSize, VM_FLAGS_ANYWHERE);
- assert(allocationAddr != 0);
- _vmAllocationStart = (void*)allocationAddr;
- _containerTypedBytes = (TypedBytes*)_vmAllocationStart;
- _containerTypedBytes->type = (uint32_t)containerType;
- _containerTypedBytes->payloadLength = 0;
- _end = (uint8_t*)_vmAllocationStart + sizeof(TypedBytes);
-}
-
-void* ContainerTypedBytesWriter::append(TypedBytes::Type t, const void* payload, uint32_t payloadSize)
-{
- assert((payloadSize & 0x3) == 0);
- if ( (uint8_t*)_end + payloadSize >= (uint8_t*)_vmAllocationStart + _vmAllocationSize ) {
- // if current buffer too small, grow it
- size_t growth = _vmAllocationSize;
- if ( growth < payloadSize )
- growth = _vmAllocationSize*((payloadSize/_vmAllocationSize)+1);
- vm_address_t newAllocationAddr;
- size_t newAllocationSize = _vmAllocationSize+growth;
- ::vm_allocate(mach_task_self(), &newAllocationAddr, newAllocationSize, VM_FLAGS_ANYWHERE);
- assert(newAllocationAddr != 0);
- size_t currentInUse = (char*)_end - (char*)_vmAllocationStart;
- memcpy((void*)newAllocationAddr, _vmAllocationStart, currentInUse);
- ::vm_deallocate(mach_task_self(), (vm_address_t)_vmAllocationStart, _vmAllocationSize);
- _end = (void*)(newAllocationAddr + currentInUse);
- _vmAllocationStart = (void*)newAllocationAddr;
- _containerTypedBytes = (TypedBytes*)_vmAllocationStart;
- _vmAllocationSize = newAllocationSize;
- }
- assert( (uint8_t*)_end + payloadSize < (uint8_t*)_vmAllocationStart + _vmAllocationSize);
- TypedBytes* tb = (TypedBytes*)_end;
- tb->type = (uint32_t)t;
- tb->payloadLength = payloadSize;
- if ( payload != nullptr )
- ::memcpy(tb->payload(), payload, payloadSize);
- _end = (uint8_t*)_end + sizeof(TypedBytes) + payloadSize;
- _containerTypedBytes->payloadLength += sizeof(TypedBytes) + payloadSize;
- return tb->payload();
-}
-
-const void* ContainerTypedBytesWriter::finalizeContainer()
-{
- // trim vm allocation down to just what is needed
- uintptr_t bufferStart = (uintptr_t)_vmAllocationStart;
- uintptr_t used = round_page((uintptr_t)_end - bufferStart);
- if ( used < _vmAllocationSize ) {
- uintptr_t deallocStart = bufferStart + used;
- ::vm_deallocate(mach_task_self(), deallocStart, _vmAllocationSize - used);
- _end = nullptr;
- _vmAllocationSize = used;
- }
- // mark vm region read-only
- ::vm_protect(mach_task_self(), bufferStart, used, false, VM_PROT_READ);
- return (void*)_vmAllocationStart;
-}
-
-const void* ContainerTypedBytesWriter::currentTypedBytes()
-{
- return (void*)_vmAllocationStart;
-}
-
-void ContainerTypedBytesWriter::deallocate()
-{
- ::vm_deallocate(mach_task_self(), (long)_vmAllocationStart, _vmAllocationSize);
-}
-
-//////////////////////////// ImageWriter ////////////////////////////////////////
-
-
-const Image* ImageWriter::finalize()
-{
- return (Image*)finalizeContainer();
-}
-
-const Image* ImageWriter::currentImage()
-{
- return (Image*)currentTypedBytes();
-}
-
-void ImageWriter::addPath(const char* path)
-{
- uint32_t roundedPathLen = ((uint32_t)strlen(path) + 1 + 3) & (-4);
- Image::PathAndHash* ph = (Image::PathAndHash*)append(TypedBytes::Type::pathWithHash, nullptr, sizeof(Image::PathAndHash)+roundedPathLen);
- ph->hash = Image::hashFunction(path);
- strcpy(ph->path, path);
-}
-
-Image::Flags& ImageWriter::getFlags()
-{
- if ( _flagsOffset == -1 ) {
- setContainerType(TypedBytes::Type::image);
- Image::Flags flags;
- ::bzero(&flags, sizeof(flags));
- uint8_t* p = (uint8_t*)append(TypedBytes::Type::imageFlags, &flags, sizeof(flags));
- _flagsOffset = (int)(p - (uint8_t*)currentTypedBytes());
- }
- return *((Image::Flags*)((uint8_t*)currentTypedBytes() + _flagsOffset));
-}
-
-void ImageWriter::setImageNum(ImageNum num)
-{
- getFlags().imageNum = num;
-}
-
-void ImageWriter::setHasObjC(bool value)
-{
- getFlags().hasObjC = value;
-}
-
-void ImageWriter::setIs64(bool value)
-{
- getFlags().is64 = value;
-}
-
-void ImageWriter::setHasPlusLoads(bool value)
-{
- getFlags().mayHavePlusLoads = value;
-}
-
-void ImageWriter::setIsBundle(bool value)
-{
- getFlags().isBundle = value;
-}
-
-void ImageWriter::setIsDylib(bool value)
-{
- getFlags().isDylib = value;
-}
-
-void ImageWriter::setIsExecutable(bool value)
-{
- getFlags().isExecutable = value;
-}
-
-void ImageWriter::setHasWeakDefs(bool value)
-{
- getFlags().hasWeakDefs = value;
-}
-
-void ImageWriter::setUses16KPages(bool value)
-{
- getFlags().has16KBpages = value;
-}
-
-void ImageWriter::setOverridableDylib(bool value)
-{
- getFlags().overridableDylib = value;
-}
-
-void ImageWriter::setInvalid()
-{
- getFlags().isInvalid = true;
-}
-
-void ImageWriter::setInDyldCache(bool value)
-{
- getFlags().inDyldCache = value;
-}
-
-void ImageWriter::setNeverUnload(bool value)
-{
- getFlags().neverUnload = value;
-}
-
-void ImageWriter::setUUID(const uuid_t uuid)
-{
- append(TypedBytes::Type::uuid, uuid, sizeof(uuid_t));
-}
-
-void ImageWriter::setCDHash(const uint8_t cdHash[20])
-{
- append(TypedBytes::Type::cdHash, cdHash, 20);
-}
-
-void ImageWriter::setDependents(const Array<Image::LinkedImage>& deps)
-{
- append(TypedBytes::Type::dependents, deps.begin(), (uint32_t)deps.count()*sizeof(Image::LinkedImage));
-}
-
-void ImageWriter::setDofOffsets(const Array<uint32_t>& dofSectionOffsets)
-{
- append(TypedBytes::Type::dofOffsets, &dofSectionOffsets[0], (uint32_t)dofSectionOffsets.count()*sizeof(uint32_t));
-}
-
-void ImageWriter::setInitOffsets(const uint32_t initOffsets[], uint32_t count)
-{
- append(TypedBytes::Type::initOffsets, initOffsets, count*sizeof(uint32_t));
-}
-
-void ImageWriter::setDiskSegments(const Image::DiskSegment segs[], uint32_t count)
-{
- append(TypedBytes::Type::diskSegment, segs, count*sizeof(Image::DiskSegment));
-}
-
-void ImageWriter::setCachedSegments(const Image::DyldCacheSegment segs[], uint32_t count)
-{
- append(TypedBytes::Type::cacheSegment, segs, count*sizeof(Image::DyldCacheSegment));
-}
-
-void ImageWriter::setCodeSignatureLocation(uint32_t fileOffset, uint32_t size)
-{
- Image::CodeSignatureLocation loc;
- loc.fileOffset = fileOffset;
- loc.fileSize = size;
- append(TypedBytes::Type::codeSignLoc, &loc, sizeof(loc));
-}
-
-void ImageWriter::setFairPlayEncryptionRange(uint32_t fileOffset, uint32_t size)
-{
- const uint32_t pageSize = getFlags().has16KBpages ? 0x4000 : 0x1000;
- assert((fileOffset % pageSize) == 0);
- assert((size % pageSize) == 0);
- Image::FairPlayRange loc;
- loc.textStartPage = fileOffset/pageSize;
- loc.textPageCount = size/pageSize;
- append(TypedBytes::Type::fairPlayLoc, &loc, sizeof(loc));
-}
-
-void ImageWriter::setMappingInfo(uint64_t sliceOffset, uint64_t vmSize)
-{
- const uint32_t pageSize = getFlags().has16KBpages ? 0x4000 : 0x1000;
- Image::MappingInfo info;
- info.sliceOffsetIn4K = (uint32_t)(sliceOffset / 0x1000);
- info.totalVmPages = (uint32_t)(vmSize / pageSize);
- append(TypedBytes::Type::mappingInfo, &info, sizeof(info));
-}
-
-void ImageWriter::setFileInfo(uint64_t inode, uint64_t mTime)
-{
- Image::FileInfo info = { inode, mTime };
- append(TypedBytes::Type::fileInodeAndTime, &info, sizeof(info));
-}
-
-void ImageWriter::setRebaseInfo(const Array<Image::RebasePattern>& fixups)
-{
- append(TypedBytes::Type::rebaseFixups, fixups.begin(), (uint32_t)fixups.count()*sizeof(Image::RebasePattern));
-}
-
-void ImageWriter::setTextRebaseInfo(const Array<Image::TextFixupPattern>& fixups)
-{
- append(TypedBytes::Type::textFixups, fixups.begin(), (uint32_t)fixups.count()*sizeof(Image::TextFixupPattern));
-}
-
-void ImageWriter::setBindInfo(const Array<Image::BindPattern>& fixups)
-{
- append(TypedBytes::Type::bindFixups, fixups.begin(), (uint32_t)fixups.count()*sizeof(Image::BindPattern));
-}
-
-void ImageWriter::setChainedFixups(const Array<uint64_t>& starts, const Array<Image::ResolvedSymbolTarget>& targets)
-{
- append(TypedBytes::Type::chainedFixupsStarts, starts.begin(), (uint32_t)starts.count()*sizeof(uint64_t));
- append(TypedBytes::Type::chainedFixupsTargets, targets.begin(), (uint32_t)targets.count()*sizeof(Image::ResolvedSymbolTarget));
-}
-
-void ImageWriter::addExportPatchInfo(uint32_t implCacheOff, const char* name, uint32_t locCount, const Image::PatchableExport::PatchLocation* locs)
-{
- uint32_t roundedNameLen = ((uint32_t)strlen(name) + 1 + 3) & (-4);
- uint32_t payloadSize = sizeof(Image::PatchableExport) + locCount*sizeof(Image::PatchableExport::PatchLocation) + roundedNameLen;
- Image::PatchableExport* buffer = (Image::PatchableExport*)append(TypedBytes::Type::cachePatchInfo, nullptr, payloadSize);
- buffer->cacheOffsetOfImpl = implCacheOff;
- buffer->patchLocationsCount = locCount;
- memcpy(&buffer->patchLocations[0], locs, locCount*sizeof(Image::PatchableExport::PatchLocation));
- strcpy((char*)(&buffer->patchLocations[locCount]), name);
-}
-
-void ImageWriter::setAsOverrideOf(ImageNum imageNum)
-{
- uint32_t temp = imageNum;
- append(TypedBytes::Type::imageOverride, &temp, sizeof(temp));
-}
-
-void ImageWriter::setInitsOrder(const ImageNum images[], uint32_t count)
-{
- append(TypedBytes::Type::initBefores, images, count*sizeof(ImageNum));
-}
-
-
-//////////////////////////// ImageArrayWriter ////////////////////////////////////////
-
-
-ImageArrayWriter::ImageArrayWriter(ImageNum startImageNum, unsigned count) : _index(0)
-{
- setContainerType(TypedBytes::Type::imageArray);
- _end = (void*)((uint8_t*)_end + sizeof(ImageArray) - sizeof(TypedBytes) + sizeof(uint32_t)*count);
- _containerTypedBytes->payloadLength = sizeof(ImageArray) - sizeof(TypedBytes) + sizeof(uint32_t)*count;
- ImageArray* ia = (ImageArray*)_containerTypedBytes;
- ia->firstImageNum = startImageNum;
- ia->count = count;
-}
-
-void ImageArrayWriter::appendImage(const Image* image)
-{
- ImageArray* ia = (ImageArray*)_containerTypedBytes;
- ia->offsets[_index++] = _containerTypedBytes->payloadLength;
- append(TypedBytes::Type::image, image->payload(), image->payloadLength);
-}
-
-const ImageArray* ImageArrayWriter::finalize()
-{
- return (ImageArray*)finalizeContainer();
-}
-
-
-//////////////////////////// ClosureWriter ////////////////////////////////////////
-
-void ClosureWriter::setTopImageNum(ImageNum imageNum)
-{
- append(TypedBytes::Type::topImage, &imageNum, sizeof(ImageNum));
-}
-
-void ClosureWriter::addCachePatches(const Array<Closure::PatchEntry>& patches)
-{
- append(TypedBytes::Type::cacheOverrides, patches.begin(), (uint32_t)patches.count()*sizeof(Closure::PatchEntry));
-}
-
-
-//////////////////////////// LaunchClosureWriter ////////////////////////////////////////
-
-LaunchClosureWriter::LaunchClosureWriter(const ImageArray* images)
-{
- setContainerType(TypedBytes::Type::launchClosure);
- append(TypedBytes::Type::imageArray, images->payload(), images->payloadLength);
-}
-
-const LaunchClosure* LaunchClosureWriter::finalize()
-{
- return (LaunchClosure*)finalizeContainer();
-}
-
-void LaunchClosureWriter::setLibSystemImageNum(ImageNum imageNum)
-{
- append(TypedBytes::Type::libSystemNum, &imageNum, sizeof(ImageNum));
-}
-
-void LaunchClosureWriter::setLibDyldEntry(Image::ResolvedSymbolTarget entry)
-{
- append(TypedBytes::Type::libDyldEntry, &entry, sizeof(entry));
-}
-
-void LaunchClosureWriter::setMainEntry(Image::ResolvedSymbolTarget main)
-{
- append(TypedBytes::Type::mainEntry, &main, sizeof(main));
-}
-
-void LaunchClosureWriter::setStartEntry(Image::ResolvedSymbolTarget start)
-{
- append(TypedBytes::Type::startEntry, &start, sizeof(start));
-}
-
-void LaunchClosureWriter::setUsedFallbackPaths(bool value)
-{
- getFlags().usedFallbackPaths = value;
-}
-
-void LaunchClosureWriter::setUsedAtPaths(bool value)
-{
- getFlags().usedAtPaths = value;
-}
-
-void LaunchClosureWriter::setInitImageCount(uint32_t count)
-{
- getFlags().initImageCount = count;
-}
-
-LaunchClosure::Flags& LaunchClosureWriter::getFlags()
-{
- if ( _flagsOffset == -1 ) {
- LaunchClosure::Flags flags;
- ::bzero(&flags, sizeof(flags));
- uint8_t* p = (uint8_t*)append(TypedBytes::Type::closureFlags, &flags, sizeof(flags));
- _flagsOffset = (int)(p - (uint8_t*)currentTypedBytes());
- }
- return *((LaunchClosure::Flags*)((uint8_t*)currentTypedBytes() + _flagsOffset));
-}
-
-void LaunchClosureWriter::setMustBeMissingFiles(const Array<const char*>& paths)
-{
- uint32_t totalSize = 0;
- for (const char* s : paths)
- totalSize += (strlen(s) +1);
- totalSize = (totalSize + 3) & (-4); // align
-
- char* buffer = (char*)append(TypedBytes::Type::missingFiles, nullptr, totalSize);
- char* t = buffer;
- for (const char* path : paths) {
- for (const char* s=path; *s != '\0'; ++s)
- *t++ = *s;
- *t++ = '\0';
- }
- while (t < &buffer[totalSize])
- *t++ = '\0';
-}
-
-void LaunchClosureWriter::addEnvVar(const char* envVar)
-{
- unsigned len = (unsigned)strlen(envVar);
- char temp[len+8];
- strcpy(temp, envVar);
- unsigned paddedSize = len+1;
- while ( (paddedSize % 4) != 0 )
- temp[paddedSize++] = '\0';
- append(TypedBytes::Type::envVar, temp, paddedSize);
-}
-
-void LaunchClosureWriter::addInterposingTuples(const Array<InterposingTuple>& tuples)
-{
- append(TypedBytes::Type::interposeTuples, tuples.begin(), (uint32_t)tuples.count()*sizeof(InterposingTuple));
-}
-
-void LaunchClosureWriter::setDyldCacheUUID(const uuid_t uuid)
-{
- append(TypedBytes::Type::dyldCacheUUID, uuid, sizeof(uuid_t));
-}
-
-void LaunchClosureWriter::setBootUUID(const char* uuid)
-{
- unsigned len = (unsigned)strlen(uuid);
- char temp[len+8];
- strcpy(temp, uuid);
- unsigned paddedSize = len+1;
- while ( (paddedSize % 4) != 0 )
- temp[paddedSize++] = '\0';
- append(TypedBytes::Type::bootUUID, temp, paddedSize);
-}
-
-void LaunchClosureWriter::applyInterposing()
-{
- const LaunchClosure* currentClosure = (LaunchClosure*)currentTypedBytes();
- const ImageArray* images = currentClosure->images();
- currentClosure->forEachInterposingTuple(^(const InterposingTuple& tuple, bool&) {
- images->forEachImage(^(const dyld3::closure::Image* image, bool&) {
- for (const Image::BindPattern& bindPat : image->bindFixups()) {
- if ( (bindPat.target == tuple.stockImplementation) && (tuple.newImplementation.image.imageNum != image->imageNum()) ) {
- Image::BindPattern* writePat = const_cast<Image::BindPattern*>(&bindPat);
- writePat->target = tuple.newImplementation;
- }
- }
-
- // Chained fixups may also be interposed. We can't change elements in the chain, but we can change
- // the target list.
- for (const Image::ResolvedSymbolTarget& symbolTarget : image->chainedTargets()) {
- if ( (symbolTarget == tuple.stockImplementation) && (tuple.newImplementation.image.imageNum != image->imageNum()) ) {
- Image::ResolvedSymbolTarget* writeTarget = const_cast<Image::ResolvedSymbolTarget*>(&symbolTarget);
- *writeTarget = tuple.newImplementation;
- }
- }
- });
- });
-}
-
-//////////////////////////// DlopenClosureWriter ////////////////////////////////////////
-
-DlopenClosureWriter::DlopenClosureWriter(const ImageArray* images)
-{
- setContainerType(TypedBytes::Type::dlopenClosure);
- append(TypedBytes::Type::imageArray, images->payload(), images->payloadLength);
-}
-
-const DlopenClosure* DlopenClosureWriter::finalize()
-{
- return (DlopenClosure*)finalizeContainer();
-}
-
-
-} // namespace closure
-} // namespace dyld3
-
-
-