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--- dyld/dyld-1162/mach_o/ChainedFixups.cpp
+++ dyld/dyld-1330/mach_o/ChainedFixups.cpp
@@ -29,17 +29,14 @@
#include <mach-o/loader.h>
#include <mach-o/nlist.h>
-#if BUILDING_MACHO_WRITER
-#include "Algorithm.h"
-#include "Array.h"
-#endif
-
#include "Array.h"
#include "ChainedFixups.h"
#include "Misc.h"
#include "Image.h"
+
+
using dyld3::Array;
namespace mach_o {
@@ -55,10 +52,14 @@
{
}
-const dyld_chained_fixups_header* ChainedFixups::bytes(size_t& size) const
-{
- size = _fixupsSize;
+const dyld_chained_fixups_header* ChainedFixups::linkeditHeader() const
+{
return _fixupsHeader;
+}
+
+const dyld_chained_starts_offsets* ChainedFixups::startsSectionHeader() const
+{
+ return _chainStartsHeader;
}
void ChainedFixups::forEachBindTarget(void (^callback)(const Fixup::BindTarget&, bool& stop)) const
@@ -154,22 +155,8 @@
return (dyld_chained_starts_in_segment*)((uint8_t*)imageStarts + segInfoOffset);
}
-const ChainedFixups::PointerFormat& ChainedFixups::pointerFormat() const
-{
- const dyld_chained_starts_in_image* imageStarts = (dyld_chained_starts_in_image*)((uint8_t*)_fixupsHeader + _fixupsHeader->starts_offset);
- for (uint32_t segIndex=0; segIndex < imageStarts->seg_count; ++segIndex) {
- uint32_t segInfoOffset = imageStarts->seg_info_offset[segIndex];
- if ( segInfoOffset == 0 )
- continue;
- const dyld_chained_starts_in_segment* segStarts = (dyld_chained_starts_in_segment*)((uint8_t*)imageStarts + segInfoOffset);
- if ( segStarts->pointer_format != 0 )
- return PointerFormat::make(segStarts->pointer_format);
- }
- assert(0 && "can't find pointer format");
-}
-
void ChainedFixups::forEachFixupChainStartLocation(std::span<const MappedSegment> segments,
- void (^callback)(const void* loc, uint32_t segIndex, const PointerFormat&, bool& stop)) const
+ void (^callback)(const void* loc, uint32_t segIndex, uint32_t pageIndex, uint32_t pageSize, const PointerFormat&, bool& stop)) const
{
bool stop = false;
for (uint32_t segIndex=0; segIndex < segments.size(); ++segIndex) {
@@ -185,15 +172,15 @@
bool chainEnd = false;
while ( !chainEnd ) {
chainEnd = (segStarts->page_start[overflowIndex] & DYLD_CHAINED_PTR_START_LAST);
- uint16_t startOffset = (segStarts->page_start[overflowIndex] & ~DYLD_CHAINED_PTR_START_LAST);
- uint32_t* chainStart = (uint32_t*)((uint8_t*)(segments[segIndex].content) + startOffset);
- callback(chainStart, segIndex, pf, stop);
+ uint16_t startOffset = (segStarts->page_start[overflowIndex] & ~DYLD_CHAINED_PTR_START_LAST);
+ const uint8_t* chainStart = (uint8_t*)(segments[segIndex].content) + pageIndex * segStarts->page_size + startOffset;
+ callback(chainStart, segIndex, pageIndex, segStarts->page_size, pf, stop);
++overflowIndex;
}
}
else {
const uint8_t* chainStart = ((uint8_t*)(segments[segIndex].content)) + pageIndex * segStarts->page_size + offsetInPage;
- callback(chainStart, segIndex, pf, stop);
+ callback(chainStart, segIndex, pageIndex, segStarts->page_size, pf, stop);
}
if ( stop )
return;
@@ -203,12 +190,8 @@
}
-Error ChainedFixups::valid(std::span<const MappedSegment> segments) const
-{
-#if BUILDING_MACHO_WRITER
- if ( _buildError.hasError() )
- return Error("%s", _buildError.message());
-#endif
+Error ChainedFixups::validLinkedit(uint64_t preferredLoadAddress, std::span<const MappedSegment> segments) const
+{
// validate dyld_chained_fixups_header
if ( _fixupsHeader->fixups_version != 0 )
return Error("chained fixups, unknown header version (%d)", _fixupsHeader->fixups_version);
@@ -320,20 +303,39 @@
}
// validate import table size can fit
uint32_t maxBindOrdinal = PointerFormat::make(pointer_format_for_all).maxBindOrdinal(false);
- if ( _fixupsHeader->imports_count >= maxBindOrdinal )
+ if ( (_fixupsHeader->imports_count != 0) && (_fixupsHeader->imports_count >= maxBindOrdinal) )
return Error("chained fixups, imports_count (%d) exceeds max of %d", _fixupsHeader->imports_count, maxBindOrdinal);
// validate max_valid_pointer is larger than last segment
- //if ( maxValidPointerSeen != 0 ) {
- // uint64_t lastSegmentLastVMAddr = segmentsInfo[leInfo.layout.linkeditSegIndex-1].vmAddr + segmentsInfo[leInfo.layout.linkeditSegIndex-1].vmSize;
- // if ( maxValidPointerSeen < lastSegmentLastVMAddr ) {
- // return Error("chained fixups, max_valid_pointer too small for image");
- // }
- //}
+ if ( maxValidPointerSeen != 0 ) {
+ size_t lastDataSegmentIndex = segments.size() - (segments.back().segName == "__LINKEDIT" ? 2 : 1);
+ const MappedSegment& lastDataSegment = segments[lastDataSegmentIndex];
+ // note: runtime offset is relative to the load address but max valid pointer encodes an 'absolute' valid pointer
+ uint64_t lastDataSegmentLastVMAddr = preferredLoadAddress + lastDataSegment.runtimeOffset + lastDataSegment.runtimeSize;
+ if ( maxValidPointerSeen < lastDataSegmentLastVMAddr )
+ return Error("chained fixups, max_valid_pointer (0x%x) too small for image last vm address 0x%llx", maxValidPointerSeen, lastDataSegmentLastVMAddr);
+ }
return Error::none();
}
-
+Error ChainedFixups::validStartsSection(std::span<const MappedSegment> segments) const
+{
+ // validate dyld_chained_starts_offsets
+ if ( !PointerFormat::valid(_chainStartsHeader->pointer_format) ) {
+ return Error("chained fixups, unknown pointer_format (%d)", _chainStartsHeader->pointer_format);
+ }
+ return Error::none();
+}
+
+Error ChainedFixups::valid(uint64_t preferredLoadAddress, std::span<const MappedSegment> segments,
+ bool startsInSection) const
+{
+ if ( startsInSection ) {
+ return validStartsSection(segments);
+ } else {
+ return validLinkedit(preferredLoadAddress, segments);
+ }
+}
const char* ChainedFixups::importsFormatName(uint32_t format)
{
switch (format) {
@@ -353,563 +355,52 @@
}
void ChainedFixups::PointerFormat::forEachFixupLocationInChain(const void* chainStartLoc, uint64_t prefLoadAddr, const MappedSegment* seg,
- void (^callback)(const Fixup& info, bool& stop)) const
-{
- bool stop = false;
- const void* nextLoc = nullptr;
+ std::span<const uint64_t> segOffsetTable, uint32_t pageIndex, uint32_t pageSize,
+ void (^callback)(const Fixup& f, bool& stop)) const
+{
+ bool stop = false;
+ const void* nextLoc = nullptr;
+ const void* endPage = nullptr;
+ // note: seg is null for firmware and firmware does not require chains to be limited to one page
+ if ( seg != nullptr ) {
+ const void* startPage = (void*)((uint8_t*)seg->content + pageIndex*pageSize);
+ endPage = (void*)((uint8_t*)startPage + pageSize);
+ if ( (chainStartLoc < startPage) || (chainStartLoc > endPage) )
+ return; // error: chain is not on page
+ }
for ( const void* fixupLoc = chainStartLoc; (fixupLoc != nullptr) && !stop; fixupLoc = nextLoc) {
- // get next before calling callback, because callback may update location (set runtime pointer)
+ // get next before calling callback, because callback may update location (change PointerFormat bits into runtime pointer)
nextLoc = this->nextLocation(fixupLoc);
- callback(this->parseChainEntry(fixupLoc, seg, prefLoadAddr), stop);
- }
-}
-
-
-#if BUILDING_MACHO_WRITER
-
-
-template <typename T>
-static T align8(T value)
-{
- return (value + 7) & (-8);
-}
-
-size_t ChainedFixups::linkeditSize(std::span<const Fixup::BindTarget> bindTargets,
- std::span<const SegmentFixupsInfo> segments,
- uint32_t pageSize)
-{
- // scan binds to figure out which imports table format to use
- uint16_t imFormat;
- size_t stringPoolSize;
- if ( Error err = importsFormat(bindTargets, imFormat, stringPoolSize) )
- return 0;
-
- // allocate space in _bytes for full dyld_chained_fixups data structure
- size_t maxBytesNeeded = align8(sizeof(dyld_chained_fixups_header));
- maxBytesNeeded += offsetof(dyld_chained_starts_in_image,seg_info_offset[segments.size()]);
- for ( const SegmentFixupsInfo& segment : segments ) {
- const MappedSegment& seg = segment.mappedSegment;
- uint32_t extras = segment.numPageExtras;
- std::span<const Fixup> segFixups = segment.fixups;
- if ( seg.writable && (seg.runtimeSize != 0) && !segFixups.empty() ) {
- uint64_t lastFixupSegmentOffset = (uint64_t)segFixups.back().location - (uint64_t)seg.content;
- uint64_t lastFixupPage = (lastFixupSegmentOffset / pageSize) + 1;
- size_t segInfoSize = align8(offsetof(dyld_chained_starts_in_segment, page_start[lastFixupPage + extras]));
- maxBytesNeeded += segInfoSize;
- }
- }
-
- maxBytesNeeded = align8(maxBytesNeeded);
-
- size_t importTableSize = 0;
- if ( imFormat == DYLD_CHAINED_IMPORT_ADDEND64 )
- importTableSize = align8(sizeof(dyld_chained_import_addend64) * bindTargets.size());
- else if ( imFormat == DYLD_CHAINED_IMPORT_ADDEND )
- importTableSize = align8(sizeof(dyld_chained_import_addend) * bindTargets.size());
- else
- importTableSize = align8(sizeof(dyld_chained_import) * bindTargets.size());
-
- maxBytesNeeded += importTableSize;
- maxBytesNeeded += align8(stringPoolSize);
-
- return maxBytesNeeded;
-}
-
-void ChainedFixups::calculateSegmentPageExtras(std::span<SegmentFixupsInfo> segments,
- const PointerFormat& pointerFormat,
- uint32_t pageSize)
-{
- for ( SegmentFixupsInfo& segmentFixupInfo : segments ) {
- const MappedSegment& segment = segmentFixupInfo.mappedSegment;
- const std::span<const Fixup> fixupsInSegment = segmentFixupInfo.fixups;
- uint32_t numExtras = 0;
-
- // skip segments with no fixups
- if ( !segment.writable || (segment.runtimeSize == 0) || fixupsInSegment.empty() )
- continue;
-
- int curPageIndex = -1;
- const Fixup* prevFixup = nullptr;
- bool pageHasExtras = false;
- for ( const Fixup& fixup : fixupsInSegment ) {
- uint64_t offset = (uint8_t*)fixup.location - (uint8_t*)segment.content;
- int pageIndex = (int)(offset/pageSize);
- if ( pageIndex != curPageIndex ) {
- curPageIndex = pageIndex;
- prevFixup = nullptr;
- pageHasExtras = false;
- }
- if ( prevFixup != nullptr ) {
- intptr_t delta = (uint8_t*)fixup.location - (uint8_t*)(prevFixup->location);
- if ( delta > pointerFormat.maxNext() ) {
- // prev/next are too far apart for chain to span, instead terminate chain at prevFixup
- // then start new overflow chain
- if ( !pageHasExtras ) {
- // A page with extras needs a start and end of the chain too
- numExtras += 2;
- pageHasExtras = true;
- }
- ++numExtras;
- }
- }
- prevFixup = &fixup;
- }
-
- segmentFixupInfo.numPageExtras = numExtras;
- }
-}
-
-Error ChainedFixups::importsFormat(std::span<const Fixup::BindTarget> bindTargets, uint16_t& importsFormat, size_t& stringPoolSize)
-{
- bool hasLargeOrdinal = false;
- bool has32bitAddend = false;
- bool has64bitAddend = false;
- stringPoolSize = 1;
- for (const Fixup::BindTarget& bind : bindTargets) {
- stringPoolSize += (bind.symbolName.size() + 1);
- if ( bind.libOrdinal < -15 ) {
- // TODO: currently only -1, -2, and -3 have meaning. Should we error here for < -3 ?
- return Error("special libOrdinal (%d) too small", bind.libOrdinal);
- }
- if ( bind.libOrdinal > 240 ) {
- hasLargeOrdinal = true;
- if ( bind.libOrdinal > 65520 ) {
- return Error("libOrdinal (%d) too large", bind.libOrdinal);
- }
- }
- if ( bind.addend != 0 ) {
- int32_t addend32 = (int32_t)bind.addend;
- if ( (int64_t)addend32 == bind.addend )
- has32bitAddend = true;
- else
- has64bitAddend = true;
- }
- }
- bool hasLargeStringOffsets = dyld_chained_import{.name_offset=(uint32_t)stringPoolSize}.name_offset != stringPoolSize;
-
- if ( hasLargeStringOffsets || has64bitAddend || hasLargeOrdinal )
- importsFormat = DYLD_CHAINED_IMPORT_ADDEND64;
- else if ( has32bitAddend )
- importsFormat = DYLD_CHAINED_IMPORT_ADDEND;
- else
- importsFormat = DYLD_CHAINED_IMPORT;
-
- if ( stringPoolSize > 0xFFFFFFFF )
- return Error("imports string pool > 4GB");
-
- return Error::none();
-}
-
-#if BUILDING_UNIT_TESTS
-ChainedFixups::ChainedFixups(std::span<const Fixup::BindTarget> bindTargets,
- std::span<const Fixup> fixups,
- std::span<const MappedSegment> segments,
- uint64_t preferredLoadAddress,
- const PointerFormat& pointerFormat, uint32_t pageSize, bool setDataChains)
-{
- std::vector<std::vector<Fixup>> fixupsInSegments;
- fixupsInSegments.reserve(segments.size());
-
- {
- // unify and sort fixups to make chains
- std::vector<Fixup> sortedFixups(fixups.begin(), fixups.end());
- std::sort(sortedFixups.begin(), sortedFixups.end());
-
- // verify there are no locations with multiple fixups
- if ( sortedFixups.size() > 1 ) {
- Fixup lastLoc = sortedFixups.back();
- for (const Fixup& f : sortedFixups) {
- if ( f.location == lastLoc.location ) {
- _buildError = Error("multiple fixups at same location in %.*s at offset=0x%lX",
- (int)f.segment->segName.size(), f.segment->segName.data(), (uint8_t*)f.location - (uint8_t*)(f.segment->content));
- return;
- }
- lastLoc = f;
- }
- }
-
- for ( const Fixup fixup : sortedFixups) {
- uint64_t segmentIndex = fixup.segment - &segments.front();
- fixupsInSegments[segmentIndex].push_back(fixup);
- }
- }
-
- std::vector<SegmentFixupsInfo> segmentFixupInfos;
- for ( uint32_t segIndex = 0; segIndex != segments.size(); ++segIndex ) {
- segmentFixupInfos.push_back({ segments[segIndex], fixupsInSegments[segIndex], 0 });
- }
-
- calculateSegmentPageExtras(segmentFixupInfos, pointerFormat, pageSize);
-
- buildFixups(bindTargets, segmentFixupInfos, preferredLoadAddress, pointerFormat, pageSize, setDataChains);
-}
-#endif
-
-
-ChainedFixups::ChainedFixups(std::span<const Fixup::BindTarget> bindTargets,
- std::span<const SegmentFixupsInfo> segments,
- uint64_t preferredLoadAddress,
- const PointerFormat& pointerFormat, uint32_t pageSize, bool setDataChains)
-{
- buildFixups(bindTargets, segments, preferredLoadAddress, pointerFormat, pageSize, setDataChains);
-}
-
-template<typename T, typename U>
-void atomic_min(std::atomic<T>& location, U value, const T defaultValue = nullptr) {
- // If we manage to swap with the default value, then no other thread had set the value, and we're done
- T expected = defaultValue;
- while ( !location.compare_exchange_weak(expected, value, std::memory_order::release, std::memory_order_relaxed) ) {
- // Value change before the store, if new value is smaller (but not null) then there's no need to store
- if ( expected != defaultValue && expected <= value )
- break;
- }
-}
-
-template<typename T, typename U>
-void atomic_max(std::atomic<T>& location, U value) {
- // If we manage to swap with nullptr, then no other thread had set the value, and we're done
- T expected = nullptr;
- while ( !location.compare_exchange_weak(expected, value, std::memory_order::release, std::memory_order_relaxed) ) {
- // Value change before the store, if new value is larger then there's no need to store
- if ( expected >= value )
- break;
- }
-}
-
-
-void ChainedFixups::buildFixups(std::span<const Fixup::BindTarget> bindTargets,
- std::span<const SegmentFixupsInfo> segments,
- uint64_t preferredLoadAddress,
- const PointerFormat& pointerFormat, uint32_t pageSize, bool setDataChains)
-{
- // scan binds to figure out which imports table format to use
- uint16_t imFormat;
- size_t stringPoolSize;
- _buildError = importsFormat(bindTargets, imFormat, stringPoolSize);
- if ( _buildError.hasError() )
- return;
-
-
- // build imports table
- std::vector<char> stringPool;
- size_t importsTableSize = 0;
- const void* importsTableStart = nullptr;
- std::vector<dyld_chained_import> imports ;
- std::vector<dyld_chained_import_addend> importsAddend;
- std::vector<dyld_chained_import_addend64> importsAddend64;
- stringPool.reserve(stringPoolSize);
- stringPool.push_back('\0'); // so that zero is never a legal string offset
- if ( imFormat == DYLD_CHAINED_IMPORT_ADDEND64 ) {
- importsAddend64.reserve(bindTargets.size());
- for (const Fixup::BindTarget& bind : bindTargets) {
- importsAddend64.push_back({(uint16_t)bind.libOrdinal, bind.weakImport, 0, addSymbolString(bind.symbolName, stringPool), (uint64_t)bind.addend});
- }
- importsTableSize = sizeof(dyld_chained_import_addend64) * importsAddend64.size();
- if ( !importsAddend64.empty() )
- importsTableStart = &importsAddend64[0];
- }
- else if ( imFormat == DYLD_CHAINED_IMPORT_ADDEND ) {
- importsAddend.reserve(bindTargets.size());
- for (const Fixup::BindTarget& bind : bindTargets) {
- importsAddend.push_back({(uint8_t)bind.libOrdinal, bind.weakImport, addSymbolString(bind.symbolName, stringPool), (int32_t)bind.addend});
- }
- importsTableSize = sizeof(dyld_chained_import_addend) * importsAddend.size();
- if ( !importsAddend.empty() )
- importsTableStart = &importsAddend[0];
- }
- else {
- // can use most compact imports encoding
- imports.reserve(bindTargets.size());
- for (const Fixup::BindTarget& bind : bindTargets) {
- imports.push_back({(uint8_t)bind.libOrdinal, bind.weakImport, addSymbolString(bind.symbolName, stringPool)});
- }
- importsTableSize = sizeof(dyld_chained_import) * imports.size();
- if ( !imports.empty() )
- importsTableStart = &imports[0];
- }
-
- // for 32-bit archs, compute maxRebaseAddress value
- uint64_t maxRebaseAddress = 0;
- if ( !pointerFormat.is64() ) {
- for ( const SegmentFixupsInfo& segment : segments ) {
- const MappedSegment& seg = segment.mappedSegment;
- if ( seg.segName == "__LINKEDIT" ) {
- uint64_t baseAddress = preferredLoadAddress;
- if ( baseAddress == 0x4000 )
- baseAddress = 0; // 32-bit main executables have rebase targets that are zero based
- maxRebaseAddress = (seg.runtimeOffset + 0x00100000-1) & -0x00100000; // align to 1MB
- }
- }
- }
-
- // allocate space in _bytes for full dyld_chained_fixups data structure
- size_t maxBytesNeeded = linkeditSize(bindTargets, segments, pageSize);
- _bytes.resize(maxBytesNeeded, 0); // ensure alignment padding is zeroed out
-
- // build dyld_chained_fixups data structure
- dyld_chained_fixups_header* header = (dyld_chained_fixups_header*)(&_bytes[0]);
- header->fixups_version = 0; // version 0
- header->starts_offset = (uint32_t)align8(sizeof(dyld_chained_fixups_header)); // 8-byte align dyld_chained_starts_in_image
- header->imports_offset = 0; // filled in later
- header->symbols_offset = 0; // filled in later
- header->imports_count = (uint32_t)bindTargets.size();
- header->imports_format = imFormat;
- header->symbols_format = 0; // raw strings
- dyld_chained_starts_in_image* startsInfo = (dyld_chained_starts_in_image*)(&_bytes[header->starts_offset]);
- startsInfo->seg_count = (uint32_t)segments.size();
-
- // create dyld_chained_starts_in_segment for each segment
- {
- uint32_t segInfoOffset = (uint32_t)align8(offsetof(dyld_chained_starts_in_image,seg_info_offset[segments.size()]));
- for ( uint32_t segIndex = 0; segIndex != segments.size(); ++segIndex ) {
- const MappedSegment& segment = segments[segIndex].mappedSegment;
- const std::span<const Fixup> fixupsInSegment = segments[segIndex].fixups;
-
- // don't make dyld_chained_starts_in_segment for segments with no fixups
- if ( !segment.writable || (segment.runtimeSize == 0) || fixupsInSegment.empty() ) {
- startsInfo->seg_info_offset[segIndex] = 0;
- continue;
- }
-
- startsInfo->seg_info_offset[segIndex] = segInfoOffset;
- dyld_chained_starts_in_segment* segInfo = (dyld_chained_starts_in_segment*)(&_bytes[header->starts_offset+segInfoOffset]);
- segInfo->size = 0; // filled in later
- segInfo->page_size = pageSize;
- segInfo->pointer_format = pointerFormat.value();
- segInfo->segment_offset = segment.runtimeOffset;
- segInfo->max_valid_pointer = (uint32_t)maxRebaseAddress;
- segInfo->page_count = 0; // fill in later, may be trailing pages with no fixups
- segInfo->page_start[0] = DYLD_CHAINED_PTR_START_NONE;
-
- uint64_t lastFixupSegmentOffset = (uint64_t)fixupsInSegment.back().location - (uint64_t)segment.content;
- uint64_t lastFixupPage = (lastFixupSegmentOffset / pageSize) + 1;
-
- segInfo->page_count = lastFixupPage;
- segInfo->size = (uint32_t)offsetof(dyld_chained_starts_in_segment, page_start[segInfo->page_count]);
-
- // adjust segment size info to include overflow entries
- segInfo->size += segments[segIndex].numPageExtras * sizeof(uint16_t);
-
- segInfoOffset += segInfo->size;
- segInfoOffset = align8(segInfoOffset);
- }
-
- header->imports_offset = align8(header->starts_offset + segInfoOffset);
- header->symbols_offset = (uint32_t)align8(header->imports_offset + importsTableSize);
- }
-
- // For segments, we're going to try do each page in parallel when possible
- // First this means computing the range of fixups for every page. We can do that in parallel
- // Then walk those ranges in parallel.
- // For segments with pageExtras, its too hard to do pages in parallel so we'll go serially
- for ( uint32_t segIndex = 0; segIndex != segments.size(); ++segIndex ) {
- uint32_t segInfoOffset = startsInfo->seg_info_offset[segIndex];
- if ( segInfoOffset == 0 )
- continue;
-
- const dyld_chained_starts_in_segment* segInfo = (dyld_chained_starts_in_segment*)(&_bytes[header->starts_offset + segInfoOffset]);
-
- const MappedSegment& segment = segments[segIndex].mappedSegment;
- const std::span<const Fixup> segFixups = segments[segIndex].fixups;
- uint32_t segExtras = segments[segIndex].numPageExtras;
-
- std::span<uint16_t> pageStarts = { (uint16_t*)&segInfo->page_start[0], segInfo->page_count };
- const uint32_t minNext = pointerFormat.minNext();
-
- if ( segExtras != 0 ) {
- // Segment has extras. Take the slow path
- std::span<uint16_t> extras = { (uint16_t*)&segInfo->page_start[segInfo->page_count], segExtras };
-
- int curPageIndex = -1;
- int curExtrasIndex = -1;
- const Fixup* prevFixup = nullptr;
- for ( const Fixup& fixup : segFixups ) {
- uint64_t segOffset = (uint8_t*)fixup.location - (uint8_t*)segment.content;
- int pageIndex = (int)(segOffset/pageSize);
- if ( pageIndex != curPageIndex ) {
- // End the previous chain if we have one
- if ( prevFixup != nullptr ) {
- if ( (pageStarts[curPageIndex] & DYLD_CHAINED_PTR_START_MULTI) != 0 ) {
- // Mark the end of this extras chain
- extras[curExtrasIndex] |= DYLD_CHAINED_PTR_START_LAST;
- }
-
- if ( setDataChains ) {
- // set end of chain for this page
- pointerFormat.writeChainEntry(*prevFixup, nullptr, preferredLoadAddress);
- }
- }
- while (curPageIndex < pageIndex) {
- ++curPageIndex;
- pageStarts[curPageIndex] = DYLD_CHAINED_PTR_START_NONE;
- }
- pageStarts[curPageIndex] = (segOffset - (curPageIndex*pageSize));
- prevFixup = nullptr;
- }
-
- // Found a previous fixup on this page, so make a chain from it to this fixup
- if ( prevFixup != nullptr ) {
- uint8_t* chain = (uint8_t*)fixup.location;
- intptr_t delta = chain - (uint8_t*)(prevFixup->location);
- if ( delta <= pointerFormat.maxNext() ) {
- if ( (delta % minNext) != 0 ) {
- _buildError = Error("pointer not %d-byte aligned at %.*s+0x%llX, fix alignment or disable chained fixups",
- minNext, (int)segment.segName.size(), segment.segName.data(), segOffset);
- break;
- }
- else if ( setDataChains ) {
- pointerFormat.writeChainEntry(*prevFixup, chain, preferredLoadAddress);
- }
- }
- else {
- // prev/next are too far apart for chain to span, instead terminate chain at prevFixup
- if ( setDataChains )
- pointerFormat.writeChainEntry(*prevFixup, nullptr, preferredLoadAddress);
- // then start new overflow chain
- if ( (pageStarts[curPageIndex] & DYLD_CHAINED_PTR_START_MULTI) == 0 ) {
- ++curExtrasIndex;
- // move first start to overflow array
- extras[curExtrasIndex] = pageStarts[curPageIndex];
- // change first page start to point into overflow array
- pageStarts[curPageIndex] = DYLD_CHAINED_PTR_START_MULTI | (segInfo->page_count + curExtrasIndex);
- }
- uint16_t pageOffset = segOffset % pageSize;
- ++curExtrasIndex;
- extras[curExtrasIndex] = pageOffset;
- }
- }
- prevFixup = &fixup;
- }
- // if this page required multiple starts, mark last one
- if ( (pageStarts[curPageIndex] & DYLD_CHAINED_PTR_START_MULTI) != 0 ) {
- extras[curExtrasIndex] |= DYLD_CHAINED_PTR_START_LAST;
- }
- if ( setDataChains && (prevFixup != nullptr) ) {
- // set end of chain
- pointerFormat.writeChainEntry(*prevFixup, nullptr, preferredLoadAddress);
- }
- } else {
- // No extras, so use parallelism
- typedef std::pair<std::atomic<const Fixup*>, std::atomic<const Fixup*>> FixupRange;
- // use up to 128kb on stack, main thread has 8mb large stack by default
- STACK_ALLOC_OVERFLOW_SAFE_ARRAY(FixupRange, fixupRangesStorage, 0x2000);
- fixupRangesStorage.resize(segInfo->page_count);
- // array ::resize doesn't initialize new elements, so do it here
- bzero(&fixupRangesStorage[0], sizeof(FixupRange) * segInfo->page_count);
- std::span<FixupRange> fixupRanges = { &fixupRangesStorage[0], segInfo->page_count };
-
- // Walk all fixups and get the range for each page
- mapReduce(segFixups, ^(size_t, int&, std::span<const Fixup> fixups) {
-
- int curPageIndex = -1;
- const Fixup* endFixup = nullptr;
-
- // The very first fixup we process might be the first on its page, or might be
- // somewhere in the middle. So it needs as atomic min to make sure its safe with other threads
- {
- const Fixup& fixup = fixups[0];
- uint64_t segOffset = (uint8_t*)fixup.location - (uint8_t*)segment.content;
- int pageIndex = (int)(segOffset/pageSize);
- atomic_min(fixupRanges[pageIndex].first, &fixup);
-
- curPageIndex = pageIndex;
- endFixup = &fixup;
- }
-
- fixups = fixups.subspan(1);
-
- for ( const Fixup& fixup : fixups ) {
- uint64_t segOffset = (uint8_t*)fixup.location - (uint8_t*)segment.content;
- int pageIndex = (int)(segOffset/pageSize);
-
- if ( pageIndex != curPageIndex ) {
- // Crossing in to a new page. As fixups are sorted, we know for sure the
- // last fixup we processed must be on the end of its page
- fixupRanges[curPageIndex].second.store(endFixup, std::memory_order_relaxed);
-
- // Also the new fixup we have must be the first on its page
- fixupRanges[pageIndex].first.store(&fixup, std::memory_order_relaxed);
-
- curPageIndex = pageIndex;
- }
-
- endFixup = &fixup;
- }
-
- // The last fixup we have is somewhere in a page, but we don't know if its the end
- // of that page or not. Try set it as the max
- atomic_max(fixupRanges[curPageIndex].second, endFixup);
- });
-
- // If there's an unaligned fixup, this will store if offset in the segment
- std::atomic<uint64_t> unalignedFixupOffset = ~0ULL;
- std::atomic<uint64_t>& unalignedFixupOffsetRef = unalignedFixupOffset;
-
- // Now process all pages in parallel
- mapReduce(fixupRanges, std::max(fixupRanges.size() / 64, 32ul), ^(size_t, int&, std::span<FixupRange> ranges) {
- for ( const FixupRange& fixupRange : ranges ) {
- size_t pageIndex = &fixupRange - fixupRanges.data();
- const Fixup* start = fixupRange.first.load(std::memory_order_relaxed);
- const Fixup* end = fixupRange.second.load(std::memory_order_relaxed);
- if ( start == nullptr ) {
- assert(end == nullptr);
- pageStarts[pageIndex] = DYLD_CHAINED_PTR_START_NONE;
- continue;
- }
-
- assert(end != nullptr);
- assert(start <= end);
- uint64_t startSegOffset = (uint8_t*)start->location - (uint8_t*)segment.content;
- pageStarts[pageIndex] = (startSegOffset - (pageIndex * pageSize));
-
- if ( setDataChains ) {
- const Fixup* fixup = start;
- while ( fixup != end ) {
- const Fixup* prev = fixup;
- ++fixup;
- uint8_t* chain = (uint8_t*)fixup->location;
- intptr_t delta = chain - (uint8_t*)(prev->location);
- if ( (delta % minNext) != 0 ) {
- uint64_t segOffset = (uint8_t*)fixup->location - (uint8_t*)segment.content;
- atomic_min(unalignedFixupOffsetRef, segOffset, ~0ULL);
- break;
- }
- pointerFormat.writeChainEntry(*prev, chain, preferredLoadAddress);
- }
-
- // set end of chain
- pointerFormat.writeChainEntry(*end, nullptr, preferredLoadAddress);
- }
- }
- });
-
- uint64_t segOffset = unalignedFixupOffset.load(std::memory_order_relaxed);
- if ( (segOffset != ~0ULL) && !_buildError.hasError() ) {
- _buildError = Error("pointer not %d-byte aligned at %.*s+0x%llX, fix alignment or disable chained fixups",
- minNext, (int)segment.segName.size(), segment.segName.data(), segOffset);
- }
- }
- }
-
- // append import table and string pool
- memcpy(&_bytes[header->imports_offset], importsTableStart, importsTableSize);
- memcpy(&_bytes[header->symbols_offset], &stringPool[0], stringPool.size());
-
- _fixupsHeader = (dyld_chained_fixups_header*)(&_bytes[0]);
- _fixupsSize = _bytes.size();
-}
-
-
-uint32_t ChainedFixups::addSymbolString(CString symbolName, std::vector<char>& pool)
-{
- uint32_t symbolOffset = (uint32_t)pool.size();
- // end+1 to copy also the null-terminator
- pool.insert(pool.end(), symbolName.begin(), symbolName.end()+1);
- return symbolOffset;
-}
-
-
-#endif
+ callback(this->parseChainEntry(fixupLoc, seg, prefLoadAddr, segOffsetTable), stop);
+ if ( (nextLoc != nullptr) && (endPage != nullptr) ) {
+ if ( nextLoc > endPage )
+ break; // error: chain went off end of page
+ }
+ }
+}
+
+
+// copy of dyld_chained_ptr_arm64e_rebase that allows 4-byte strides
+struct __attribute__((packed)) unaligned_dyld_chained_ptr_arm64e_rebase
+{
+ uint64_t target : 43,
+ high8 : 8,
+ next : 11, // 4 or 8-byte stide
+ bind : 1, // == 0
+ auth : 1; // == 0
+};
+
+// copy of dyld_chained_ptr_arm64e_auth_rebase that allows 4-byte strides
+struct __attribute__((packed)) unaligned_dyld_chained_ptr_arm64e_auth_rebase
+{
+ uint64_t target : 32, // runtimeOffset
+ diversity : 16,
+ addrDiv : 1,
+ key : 2,
+ next : 11, // 4 or 8-byte stide
+ bind : 1, // == 0
+ auth : 1; // == 1
+};
//
@@ -929,14 +420,14 @@
int32_t bindMinEmbeddableAddend(bool authenticated) const override { return (authenticated ? 0 : -0x3FFFF); }
const void* nextLocation(const void* loc) const override {
- const dyld_chained_ptr_arm64e_rebase* ptr = (dyld_chained_ptr_arm64e_rebase*)loc;
+ const unaligned_dyld_chained_ptr_arm64e_rebase* ptr = (unaligned_dyld_chained_ptr_arm64e_rebase*)loc;
if ( ptr->next == 0 )
return nullptr;
return (void*)((uint8_t*)loc + ptr->next * stride());
}
- Fixup parseChainEntry(const void* loc, const MappedSegment* seg, uint64_t preferedLoadAddress=0) const override {
- if ( ((dyld_chained_ptr_arm64e_rebase*)loc)->bind ) {
+ Fixup parseChainEntry(const void* loc, const MappedSegment* seg, uint64_t preferedLoadAddress, std::span<const uint64_t> segOffsetTable) const override {
+ if ( ((unaligned_dyld_chained_ptr_arm64e_rebase*)loc)->bind ) {
if ( bindBitCount() == 24 ) {
const dyld_chained_ptr_arm64e_auth_bind24* authBind24Ptr = (dyld_chained_ptr_arm64e_auth_bind24*)loc;
const dyld_chained_ptr_arm64e_bind24* bind24Ptr = (dyld_chained_ptr_arm64e_bind24*)loc;
@@ -955,8 +446,8 @@
}
}
else {
- const dyld_chained_ptr_arm64e_auth_rebase* authRebasePtr = (dyld_chained_ptr_arm64e_auth_rebase*)loc;
- const dyld_chained_ptr_arm64e_rebase* rebasePtr = (dyld_chained_ptr_arm64e_rebase*)loc;
+ const unaligned_dyld_chained_ptr_arm64e_auth_rebase* authRebasePtr = (unaligned_dyld_chained_ptr_arm64e_auth_rebase*)loc;
+ const dyld_chained_ptr_arm64e_rebase* rebasePtr = (dyld_chained_ptr_arm64e_rebase*)loc;
if ( authRebasePtr->auth )
return Fixup(loc, seg, authRebasePtr->target, authRebasePtr->key, authRebasePtr->addrDiv, authRebasePtr->diversity);
else if ( unauthRebaseIsVmAddr() )
@@ -965,8 +456,26 @@
return Fixup(loc, seg, ((uint64_t)(rebasePtr->high8) << 56) | rebasePtr->target);
}
}
-#if BUILDING_MACHO_WRITER
- void writeChainEntry(const Fixup& fixup, const void* nextLoc, uint64_t preferedLoadAddress) const override {
+
+ static int64_t signExtendedAddend(dyld_chained_ptr_arm64e_bind24* bind)
+ {
+ uint64_t addend19 = bind->addend;
+ if ( addend19 & 0x40000 )
+ return addend19 | 0xFFFFFFFFFFFC0000ULL;
+ else
+ return addend19;
+ }
+
+ static int64_t signExtendedAddend(dyld_chained_ptr_arm64e_bind* bind)
+ {
+ uint64_t addend27 = bind->addend;
+ uint64_t top8Bits = addend27 & 0x00007F80000ULL;
+ uint64_t bottom19Bits = addend27 & 0x0000007FFFFULL;
+ uint64_t newValue = (top8Bits << 13) | (((uint64_t)(bottom19Bits << 37) >> 37) & 0x00FFFFFFFFFFFFFF);
+ return newValue;
+ }
+
+ Error writeChainEntry(const Fixup& fixup, const void* nextLoc, uint64_t preferedLoadAddress, std::span<const MappedSegment*>) const override {
intptr_t delta = (nextLoc == nullptr) ? 0 : ((uint8_t*)nextLoc - (uint8_t*)fixup.location);
if ( fixup.isBind ) {
if ( bindBitCount() == 24 ) {
@@ -980,9 +489,13 @@
authBind24Ptr->diversity = fixup.auth.diversity;
authBind24Ptr->zero = 0;
authBind24Ptr->ordinal = fixup.bind.bindOrdinal;
- assert(authBind24Ptr->next*stride() == delta);
- assert(authBind24Ptr->ordinal == fixup.bind.bindOrdinal);
- assert(fixup.bind.embeddedAddend == 0);
+ // validate things fit into bit fields
+ if ( authBind24Ptr->next*stride() != delta )
+ return badChainDistance(fixup, delta);
+ if ( authBind24Ptr->ordinal != fixup.bind.bindOrdinal )
+ return badBindOrdinal(fixup);
+ if ( fixup.bind.embeddedAddend != 0 )
+ return badAddend(fixup, fixup.bind.embeddedAddend);
}
else {
dyld_chained_ptr_arm64e_bind24* bind24Ptr = (dyld_chained_ptr_arm64e_bind24*)fixup.location;
@@ -992,9 +505,12 @@
bind24Ptr->addend = fixup.bind.embeddedAddend;
bind24Ptr->zero = 0;
bind24Ptr->ordinal = fixup.bind.bindOrdinal;
- assert(bind24Ptr->addend == fixup.bind.embeddedAddend);
- assert(bind24Ptr->next*stride() == delta);
- assert(bind24Ptr->ordinal == fixup.bind.bindOrdinal);
+ if ( signExtendedAddend(bind24Ptr) != fixup.bind.embeddedAddend )
+ return badAddend(fixup, fixup.bind.embeddedAddend);
+ if ( bind24Ptr->next*stride() != delta )
+ return badChainDistance(fixup, delta);
+ if ( bind24Ptr->ordinal != fixup.bind.bindOrdinal )
+ return badBindOrdinal(fixup);
}
}
else {
@@ -1008,9 +524,12 @@
authBindPtr->diversity = fixup.auth.diversity;
authBindPtr->zero = 0;
authBindPtr->ordinal = fixup.bind.bindOrdinal;
- assert(authBindPtr->next*stride() == delta);
- assert(authBindPtr->ordinal == fixup.bind.bindOrdinal);
- assert(fixup.bind.embeddedAddend == 0);
+ if ( authBindPtr->next*stride() != delta )
+ return badChainDistance(fixup, delta);
+ if ( authBindPtr->ordinal != fixup.bind.bindOrdinal )
+ return badBindOrdinal(fixup);
+ if ( fixup.bind.embeddedAddend != 0 )
+ return badAddend(fixup, fixup.bind.embeddedAddend);
}
else {
dyld_chained_ptr_arm64e_bind* bindPtr = (dyld_chained_ptr_arm64e_bind*)fixup.location;
@@ -1020,15 +539,18 @@
bindPtr->addend = fixup.bind.embeddedAddend;
bindPtr->zero = 0;
bindPtr->ordinal = fixup.bind.bindOrdinal;
- assert(bindPtr->addend == fixup.bind.embeddedAddend);
- assert(bindPtr->next*stride() == delta);
- assert(bindPtr->ordinal == fixup.bind.bindOrdinal);
+ if ( signExtendedAddend(bindPtr) != fixup.bind.embeddedAddend )
+ return badAddend(fixup, fixup.bind.embeddedAddend);
+ if ( bindPtr->next*stride() != delta )
+ return badChainDistance(fixup, delta);
+ if ( bindPtr->ordinal != fixup.bind.bindOrdinal )
+ return badBindOrdinal(fixup);
}
}
}
else {
if ( fixup.authenticated ) {
- dyld_chained_ptr_arm64e_auth_rebase* authRebasePtr = (dyld_chained_ptr_arm64e_auth_rebase*)fixup.location;
+ unaligned_dyld_chained_ptr_arm64e_auth_rebase* authRebasePtr = (unaligned_dyld_chained_ptr_arm64e_auth_rebase*)fixup.location;
authRebasePtr->auth = true;
authRebasePtr->bind = false;
authRebasePtr->next = delta/stride();
@@ -1036,11 +558,13 @@
authRebasePtr->addrDiv = fixup.auth.usesAddrDiversity;
authRebasePtr->diversity = fixup.auth.diversity;
authRebasePtr->target = fixup.rebase.targetVmOffset;
- assert(authRebasePtr->next*stride() == delta);
- assert(authRebasePtr->target == fixup.rebase.targetVmOffset);
- }
+ if ( authRebasePtr->next*stride() != delta )
+ return badChainDistance(fixup, delta);
+ if ( authRebasePtr->target != fixup.rebase.targetVmOffset )
+ return badVmOffset(fixup);
+ }
else {
- dyld_chained_ptr_arm64e_rebase* rebasePtr = (dyld_chained_ptr_arm64e_rebase*)fixup.location;
+ unaligned_dyld_chained_ptr_arm64e_rebase* rebasePtr = (unaligned_dyld_chained_ptr_arm64e_rebase*)fixup.location;
uint8_t high8 = (fixup.rebase.targetVmOffset >> 56);
uint64_t low56 = (fixup.rebase.targetVmOffset & 0x00FFFFFFFFFFFFFFULL);
rebasePtr->auth = false;
@@ -1048,12 +572,18 @@
rebasePtr->next = delta/stride();
rebasePtr->high8 = high8;
rebasePtr->target = low56 + (this->unauthRebaseIsVmAddr() ? preferedLoadAddress : 0);
- assert(rebasePtr->next*stride() == delta);
- assert(rebasePtr->target == (low56 + (this->unauthRebaseIsVmAddr() ? preferedLoadAddress : 0)));
+ if ( rebasePtr->next*stride() != delta )
+ return badChainDistance(fixup, delta);
+ if ( rebasePtr->target != (low56 + (this->unauthRebaseIsVmAddr() ? preferedLoadAddress : 0)) ) {
+ if ( this->unauthRebaseIsVmAddr() )
+ return badVmAddr(fixup, preferedLoadAddress);
+ else
+ return badVmOffset(fixup);
+ }
}
}
- }
-#endif
+ return Error::none();
+ }
protected:
virtual uint32_t bindBitCount() const = 0;
@@ -1070,6 +600,7 @@
uint16_t value() const override { return DYLD_CHAINED_PTR_ARM64E; }
const char* name() const override { return "DYLD_CHAINED_PTR_ARM64E"; }
const char* description() const override { return "authenticated arm64e, 8-byte stride, target vmadddr"; }
+ uint32_t ptrAlignmentSize() const override { return 8; } // arm64e userspace requires 8-byte ptr alignment
protected:
uint32_t bindBitCount() const override { return 16; }
uint32_t stride() const override { return 8; }
@@ -1080,7 +611,7 @@
//
// MARK: --- PointerFormat_DYLD_CHAINED_PTR_ARM64E_KERNEL ---
//
-class VIS_HIDDEN PointerFormat_DYLD_CHAINED_PTR_ARM64E_KERNEL : public PointerFormat_Generic_arm64e
+class VIS_HIDDEN __attribute__((__packed__)) PointerFormat_DYLD_CHAINED_PTR_ARM64E_KERNEL : public PointerFormat_Generic_arm64e
{
public:
uint16_t value() const override { return DYLD_CHAINED_PTR_ARM64E_KERNEL; }
@@ -1103,6 +634,7 @@
uint16_t value() const override { return DYLD_CHAINED_PTR_ARM64E_USERLAND; }
const char* name() const override { return "DYLD_CHAINED_PTR_ARM64E_USERLAND"; }
const char* description() const override { return "authenticated arm64e, 8-byte stride, target vmoffset"; }
+ uint32_t ptrAlignmentSize() const override { return 8; } // arm64e userspace requires 8-byte ptr alignment
protected:
uint32_t bindBitCount() const override { return 16; }
uint32_t stride() const override { return 8; }
@@ -1119,6 +651,7 @@
uint16_t value() const override { return DYLD_CHAINED_PTR_ARM64E_USERLAND24; }
const char* name() const override { return "DYLD_CHAINED_PTR_ARM64E_USERLAND24"; }
const char* description() const override { return "authenticated arm64e, 8-byte stride, target vmoffset"; }
+ uint32_t ptrAlignmentSize() const override { return 8; } // arm64e userspace requires 8-byte ptr alignment
protected:
uint32_t bindBitCount() const override { return 24; }
uint32_t stride() const override { return 8; }
@@ -1134,13 +667,188 @@
public:
uint16_t value() const override { return DYLD_CHAINED_PTR_ARM64E_FIRMWARE; }
const char* name() const override { return "DYLD_CHAINED_PTR_ARM64E_FIRMWARE"; }
- const char* description() const override { return "authenticated arm64e, 4-byte stride, target vmoffset"; }
+ const char* description() const override { return "authenticated arm64e, 4-byte stride, target vmaddr"; }
bool is64() const override { return true; }
protected:
uint32_t bindBitCount() const override { return 16; }
uint32_t stride() const override { return 4; }
bool unauthRebaseIsVmAddr() const override { return true; }
};
+
+
+//
+// MARK: --- PointerFormat_DYLD_CHAINED_PTR_ARM64E_SHARED_CACHE ---
+//
+class VIS_HIDDEN PointerFormat_DYLD_CHAINED_PTR_ARM64E_SHARED_CACHE : public PointerFormat_Generic_arm64e
+{
+public:
+ bool supportsBinds() const override { return false; }
+ uint16_t value() const override { return DYLD_CHAINED_PTR_ARM64E_SHARED_CACHE; }
+ const char* name() const override { return "PointerFormat_DYLD_CHAINED_PTR_ARM64E_SHARED_CACHE"; }
+ const char* description() const override { return "arm64e shared cache, 8-byte stride, target vmoffset"; }
+ uint32_t ptrAlignmentSize() const override { return 8; } // arm64e userspace requires 8-byte ptr alignment
+ uint64_t maxRebaseTargetOffset(bool auth) const override { return 0x3FFFFFFFFULL; }
+ Error writeChainEntry(const Fixup& fixup, const void* nextLoc, uint64_t preferedLoadAddress, std::span<const MappedSegment*>) const override;
+protected:
+ uint32_t bindBitCount() const override { return 0; }
+ uint32_t stride() const override { return 8; }
+ bool unauthRebaseIsVmAddr() const override { return false; }
+
+ const void* nextLocation(const void* loc) const override {
+ const dyld_chained_ptr_arm64e_shared_cache_rebase* ptr = (dyld_chained_ptr_arm64e_shared_cache_rebase*)loc;
+ if ( ptr->next == 0 )
+ return nullptr;
+ return (void*)((uint8_t*)loc + ptr->next * stride());
+ }
+
+ Fixup parseChainEntry(const void* loc, const MappedSegment* seg, uint64_t preferedLoadAddress, std::span<const uint64_t> segOffsetTable) const override {
+ const dyld_chained_ptr_arm64e_shared_cache_auth_rebase* authRebasePtr = (dyld_chained_ptr_arm64e_shared_cache_auth_rebase*)loc;
+ const dyld_chained_ptr_arm64e_shared_cache_rebase* rebasePtr = (dyld_chained_ptr_arm64e_shared_cache_rebase*)loc;
+ if ( authRebasePtr->auth ) {
+ uint8_t key = (authRebasePtr->keyIsData ? ptrauth_key_asda : ptrauth_key_asia);
+ return Fixup(loc, seg, authRebasePtr->runtimeOffset, key, authRebasePtr->addrDiv, authRebasePtr->diversity);
+ }
+ else {
+ return Fixup(loc, seg, ((uint64_t)(rebasePtr->high8) << 56) | rebasePtr->runtimeOffset);
+ }
+ }
+
+};
+
+Error PointerFormat_DYLD_CHAINED_PTR_ARM64E_SHARED_CACHE::writeChainEntry(const Fixup& fixup, const void* nextLoc, uint64_t preferedLoadAddress, std::span<const MappedSegment*>) const
+{
+ if ( fixup.isBind )
+ return Error ("shared cache fixup formate does not support binds");
+ intptr_t delta = (nextLoc == nullptr) ? 0 : ((uint8_t*)nextLoc - (uint8_t*)fixup.location);
+ if ( fixup.authenticated ) {
+ dyld_chained_ptr_arm64e_shared_cache_auth_rebase* authRebasePtr = (dyld_chained_ptr_arm64e_shared_cache_auth_rebase*)fixup.location;
+ authRebasePtr->auth = 1;
+ authRebasePtr->next = (uint32_t)(delta/8);
+ authRebasePtr->keyIsData = (fixup.auth.key == ptrauth_key_asia ? 0 : 1);
+ authRebasePtr->addrDiv = fixup.auth.usesAddrDiversity;
+ authRebasePtr->diversity = fixup.auth.diversity;
+ authRebasePtr->runtimeOffset = (fixup.rebase.targetVmOffset & 0x3FFFFFFFFULL);
+ if ( authRebasePtr->next*8 != delta )
+ return badChainDistance(fixup, delta);
+ if ( authRebasePtr->runtimeOffset != fixup.rebase.targetVmOffset )
+ return badVmOffset(fixup);
+ }
+ else {
+ dyld_chained_ptr_arm64e_shared_cache_rebase* rebasePtr = (dyld_chained_ptr_arm64e_shared_cache_rebase*)fixup.location;
+ rebasePtr->auth = 0;
+ rebasePtr->next = (uint32_t)(delta/8);
+ rebasePtr->unused = 0;
+ rebasePtr->high8 = ((fixup.rebase.targetVmOffset >> 56) & 0xFF);
+ rebasePtr->runtimeOffset = (fixup.rebase.targetVmOffset & 0x3FFFFFFFFULL);
+ if ( rebasePtr->next*8 != delta )
+ return badChainDistance(fixup, delta);
+ uint64_t targetFromEncoding = (rebasePtr->runtimeOffset | ((uint64_t)rebasePtr->high8 << 56));
+ if ( targetFromEncoding != fixup.rebase.targetVmOffset )
+ return badVmOffset(fixup);
+ }
+ return Error::none();
+}
+
+
+//
+// MARK: --- PointerFormat_DYLD_CHAINED_PTR_ARM64E_SEGMENTED ---
+//
+class VIS_HIDDEN PointerFormat_DYLD_CHAINED_PTR_ARM64E_SEGMENTED : public PointerFormat_Generic_arm64e
+{
+public:
+ bool supportsBinds() const override { return false; }
+ uint16_t value() const override { return DYLD_CHAINED_PTR_ARM64E_SEGMENTED; }
+ const char* name() const override { return "DYLD_CHAINED_PTR_ARM64E_SEGMENTED"; }
+ const char* description() const override { return "authenticated arm64e, 8-byte stride, target segIndex/offset8"; }
+ bool is64() const override { return true; }
+ Fixup parseChainEntry(const void* loc, const MappedSegment* seg, uint64_t preferedLoadAddress, std::span<const uint64_t> segOffsetTable) const override;
+ Error writeChainEntry(const Fixup& fixup, const void* nextLoc, uint64_t preferedLoadAddress, std::span<const MappedSegment*>) const override;
+ const void* nextLocation(const void* loc) const override;
+ uint64_t maxRebaseTargetOffset(bool authenticated) const override { return 0x0FFFFFFF; }
+protected:
+ uint32_t bindBitCount() const override { return 0; }
+ uint32_t stride() const override { return 4; }
+ bool unauthRebaseIsVmAddr() const override { return true; }
+};
+
+const void* PointerFormat_DYLD_CHAINED_PTR_ARM64E_SEGMENTED::nextLocation(const void* loc) const
+{
+ const dyld_chained_ptr_arm64e_segmented_rebase* ptr = (dyld_chained_ptr_arm64e_segmented_rebase*)loc;
+ if ( ptr->next == 0 )
+ return nullptr;
+ return (void*)((uint8_t*)loc + ptr->next * stride());
+}
+
+Fixup PointerFormat_DYLD_CHAINED_PTR_ARM64E_SEGMENTED::parseChainEntry(const void* loc, const MappedSegment* seg, uint64_t preferedLoadAddress, std::span<const uint64_t> segOffsetTable) const
+{
+ const dyld_chained_ptr_arm64e_auth_segmented_rebase* authSegRebasePtr = (dyld_chained_ptr_arm64e_auth_segmented_rebase*)loc;
+ const dyld_chained_ptr_arm64e_segmented_rebase* segRebasePtr = (dyld_chained_ptr_arm64e_segmented_rebase*)loc;
+ if ( authSegRebasePtr->auth ) {
+ uint64_t targetVMOffset = segOffsetTable[authSegRebasePtr->targetSegIndex] + authSegRebasePtr->targetSegOffset;
+ return Fixup(loc, seg, targetVMOffset, authSegRebasePtr->key, authSegRebasePtr->addrDiv, authSegRebasePtr->diversity);
+ }
+ else {
+ uint64_t targetVMOffset = segOffsetTable[segRebasePtr->targetSegIndex] + segRebasePtr->targetSegOffset;
+ return Fixup(loc, seg, targetVMOffset);
+ }
+}
+
+static bool findSegIndexAndOffset(std::span<const MappedSegment*> segments, uint64_t vmOffset, uint8_t& segIndex, uint64_t& segOffset)
+{
+ int index=0;
+ for (const MappedSegment* seg : segments) {
+ if ( (seg->runtimeOffset <= vmOffset) && (vmOffset <= (seg->runtimeOffset+seg->runtimeSize)) ) {
+ segIndex = index;
+ segOffset = vmOffset - seg->runtimeOffset;
+ return true;
+ }
+ ++index;
+ }
+ return false;
+}
+
+
+Error PointerFormat_DYLD_CHAINED_PTR_ARM64E_SEGMENTED::writeChainEntry(const Fixup& fixup, const void* nextLoc, uint64_t preferedLoadAddress, std::span<const MappedSegment*> segments) const
+{
+ intptr_t delta = (nextLoc == nullptr) ? 0 : ((uint8_t*)nextLoc - (uint8_t*)fixup.location);
+ if ( fixup.isBind )
+ return Error("firmware format does not support binds");
+ uint8_t segIndex;
+ uint64_t segOffset;
+ bool found = findSegIndexAndOffset(segments, fixup.rebase.targetVmOffset, segIndex, segOffset);
+ if ( !found )
+ return Error("target vm address not in any segment");
+
+ if ( fixup.authenticated ) {
+ //fprintf(stderr, "key=%d, addr=%d, div=0x%04X\n", fixup.auth.key, fixup.auth.usesAddrDiversity, fixup.auth.diversity);
+ dyld_chained_ptr_arm64e_auth_segmented_rebase* authRebasePtr = (dyld_chained_ptr_arm64e_auth_segmented_rebase*)fixup.location;
+ authRebasePtr->auth = true;
+ authRebasePtr->next = (uint32_t)(delta/stride());
+ authRebasePtr->key = fixup.auth.key;
+ authRebasePtr->addrDiv = fixup.auth.usesAddrDiversity;
+ authRebasePtr->diversity = fixup.auth.diversity;
+ authRebasePtr->targetSegIndex = segIndex;
+ authRebasePtr->targetSegOffset = (uint32_t)segOffset;
+ if ( authRebasePtr->next*stride() != delta )
+ return badChainDistance(fixup, delta);
+ if ( (authRebasePtr->targetSegIndex != segIndex) || (authRebasePtr->targetSegOffset != segOffset) )
+ return badSegIndexOrOffset(fixup, segIndex, segOffset);
+ }
+ else {
+ //fprintf(stderr, "segIndex=%d, segOffset=0x%0llX\n", segIndex, segOffset);
+ dyld_chained_ptr_arm64e_segmented_rebase* rebasePtr = (dyld_chained_ptr_arm64e_segmented_rebase*)fixup.location;
+ rebasePtr->auth = false;
+ rebasePtr->next = (uint32_t)(delta/stride());
+ rebasePtr->padding = 0;
+ rebasePtr->targetSegIndex = segIndex;
+ rebasePtr->targetSegOffset = (uint32_t)segOffset;
+ if ( rebasePtr->next*stride() != delta )
+ return badChainDistance(fixup, delta);
+ if ( (rebasePtr->targetSegIndex != segIndex) || (rebasePtr->targetSegOffset != segOffset) )
+ return badSegIndexOrOffset(fixup, segIndex, segOffset);
+ }
+ return Error::none();
+}
//
@@ -1169,7 +877,7 @@
return (void*)((uint8_t*)loc + ptr->next * 4);
}
- Fixup parseChainEntry(const void* loc, const MappedSegment* seg, uint64_t preferedLoadAddress=0) const override {
+ Fixup parseChainEntry(const void* loc, const MappedSegment* seg, uint64_t preferedLoadAddress, std::span<const uint64_t> segOffsetTable) const override {
const dyld_chained_ptr_64_rebase* rebasePtr = (dyld_chained_ptr_64_rebase*)loc;
const dyld_chained_ptr_64_bind* bindPtr = (dyld_chained_ptr_64_bind*)loc;
if ( bindPtr->bind )
@@ -1179,8 +887,8 @@
else
return Fixup(loc, seg, ((uint64_t)(rebasePtr->high8) << 56) | rebasePtr->target);
}
-#if BUILDING_MACHO_WRITER
- void writeChainEntry(const Fixup& fixup, const void* nextLoc, uint64_t preferedLoadAddress) const override {
+
+ Error writeChainEntry(const Fixup& fixup, const void* nextLoc, uint64_t preferedLoadAddress, std::span<const MappedSegment*>) const override {
intptr_t delta = (nextLoc == nullptr) ? 0 : ((uint8_t*)nextLoc - (uint8_t*)fixup.location);
if ( fixup.isBind ) {
dyld_chained_ptr_64_bind* bindPtr = (dyld_chained_ptr_64_bind*)fixup.location;
@@ -1189,9 +897,12 @@
bindPtr->reserved = 0;
bindPtr->addend = fixup.bind.embeddedAddend;
bindPtr->ordinal = fixup.bind.bindOrdinal;
- assert(bindPtr->addend == fixup.bind.embeddedAddend);
- assert(bindPtr->next*4 == delta);
- assert(bindPtr->ordinal == fixup.bind.bindOrdinal);
+ if ( bindPtr->addend != fixup.bind.embeddedAddend )
+ return badAddend(fixup, fixup.bind.embeddedAddend);
+ if ( bindPtr->next*4 != delta )
+ return badChainDistance(fixup, delta);
+ if ( bindPtr->ordinal != fixup.bind.bindOrdinal )
+ return badBindOrdinal(fixup);
}
else if ( unauthRebaseIsVmAddr() ) {
dyld_chained_ptr_64_rebase* rebasePtr = (dyld_chained_ptr_64_rebase*)fixup.location;
@@ -1202,9 +913,11 @@
rebasePtr->reserved = 0;
rebasePtr->high8 = high8;
rebasePtr->target = low56+preferedLoadAddress;
- assert(rebasePtr->next*4 == delta);
- assert(rebasePtr->target == (low56+preferedLoadAddress));
- }
+ if ( rebasePtr->next*4 != delta )
+ return badChainDistance(fixup, delta);
+ if ( rebasePtr->target != (low56+preferedLoadAddress) )
+ return badVmAddr(fixup, preferedLoadAddress);
+ }
else {
dyld_chained_ptr_64_rebase* rebasePtr = (dyld_chained_ptr_64_rebase*)fixup.location;
uint8_t high8 = (fixup.rebase.targetVmOffset >> 56);
@@ -1214,11 +927,15 @@
rebasePtr->reserved = 0;
rebasePtr->high8 = high8;
rebasePtr->target = low56;
- assert(rebasePtr->next*4 == delta);
- assert(rebasePtr->target == low56);
- }
- }
-#endif
+ if ( rebasePtr->next*4 != delta )
+ return badChainDistance(fixup, delta);
+ uint64_t targetFromEncoding = (low56 | ((uint64_t)rebasePtr->high8 << 56));
+ if ( targetFromEncoding != fixup.rebase.targetVmOffset )
+ return badVmOffset(fixup);
+ }
+ return Error::none();
+ }
+
protected:
virtual bool unauthRebaseIsVmAddr() const { return true; }
};
@@ -1250,7 +967,7 @@
return (void*)((uint8_t*)loc + ptr->next * 4);
}
- Fixup parseChainEntry(const void* loc, const MappedSegment* seg, uint64_t preferedLoadAddress=0) const override {
+ Fixup parseChainEntry(const void* loc, const MappedSegment* seg, uint64_t preferedLoadAddress, std::span<const uint64_t> segOffsetTable) const override {
const dyld_chained_ptr_32_rebase* rebasePtr = (dyld_chained_ptr_32_rebase*)loc;
const dyld_chained_ptr_32_bind* bindPtr = (dyld_chained_ptr_32_bind*)loc;
if ( bindPtr->bind )
@@ -1258,8 +975,8 @@
else
return Fixup(loc, seg, rebasePtr->target);
}
-#if BUILDING_MACHO_WRITER
- void writeChainEntry(const Fixup& fixup, const void* nextLoc, uint64_t preferedLoadAddress) const override {
+
+ Error writeChainEntry(const Fixup& fixup, const void* nextLoc, uint64_t preferedLoadAddress, std::span<const MappedSegment*>) const override {
intptr_t delta = (nextLoc == nullptr) ? 0 : ((uint8_t*)nextLoc - (uint8_t*)fixup.location);
if ( fixup.isBind ) {
dyld_chained_ptr_32_bind* bindPtr = (dyld_chained_ptr_32_bind*)fixup.location;
@@ -1267,9 +984,12 @@
bindPtr->next = (uint32_t)(delta/4);
bindPtr->addend = fixup.bind.embeddedAddend;
bindPtr->ordinal = fixup.bind.bindOrdinal;
- assert(bindPtr->next*4 == delta);
- assert(bindPtr->addend == fixup.bind.embeddedAddend);
- assert(bindPtr->ordinal == fixup.bind.bindOrdinal);
+ if ( bindPtr->next*4 != delta )
+ return badChainDistance(fixup, delta);
+ if ( bindPtr->addend != fixup.bind.embeddedAddend )
+ return badAddend(fixup, fixup.bind.embeddedAddend);
+ if ( bindPtr->ordinal != fixup.bind.bindOrdinal )
+ return badBindOrdinal(fixup);
}
else {
dyld_chained_ptr_32_rebase* rebasePtr = (dyld_chained_ptr_32_rebase*)fixup.location;
@@ -1277,11 +997,14 @@
rebasePtr->next = (uint32_t)(delta/4);
uint64_t target = fixup.rebase.targetVmOffset+preferedLoadAddress;
rebasePtr->target = (uint32_t)target;
- assert(rebasePtr->next*4 == delta);
- assert(rebasePtr->target == target);
- }
- }
-#endif
+ if ( rebasePtr->next*4 != delta )
+ return badChainDistance(fixup, delta);
+ if ( rebasePtr->target != target )
+ return badVmOffset(fixup);
+ }
+ return Error::none();
+ }
+
};
@@ -1311,20 +1034,22 @@
return (void*)((uint8_t*)loc + ptr->next * 4);
}
- Fixup parseChainEntry(const void* loc, const MappedSegment* seg, uint64_t preferedLoadAddress=0) const override {
+ Fixup parseChainEntry(const void* loc, const MappedSegment* seg, uint64_t preferedLoadAddress, std::span<const uint64_t> segOffsetTable) const override {
const dyld_chained_ptr_32_cache_rebase* rebasePtr = (dyld_chained_ptr_32_cache_rebase*)loc;
return Fixup(loc, seg, rebasePtr->target);
}
-#if BUILDING_MACHO_WRITER
- void writeChainEntry(const Fixup& fixup, const void* nextLoc, uint64_t preferedLoadAddress) const override {
+
+ Error writeChainEntry(const Fixup& fixup, const void* nextLoc, uint64_t preferedLoadAddress, std::span<const MappedSegment*>) const override {
intptr_t delta = (nextLoc == nullptr) ? 0 : ((uint8_t*)nextLoc - (uint8_t*)fixup.location);
dyld_chained_ptr_32_cache_rebase* rebasePtr = (dyld_chained_ptr_32_cache_rebase*)fixup.location;
rebasePtr->next = (uint32_t)(delta/4);
rebasePtr->target = (uint32_t)fixup.rebase.targetVmOffset;
- assert(rebasePtr->next*4 == delta);
- assert(rebasePtr->target == fixup.rebase.targetVmOffset);
- }
-#endif
+ if ( rebasePtr->next*4 != delta )
+ return badChainDistance(fixup, delta);
+ if ( rebasePtr->target != fixup.rebase.targetVmOffset )
+ return badVmOffset(fixup);
+ return Error::none();
+ }
};
@@ -1355,20 +1080,22 @@
return (void*)((uint8_t*)loc + ptr->next * 4);
}
- Fixup parseChainEntry(const void* loc, const MappedSegment* seg, uint64_t preferedLoadAddress=0) const override {
+ Fixup parseChainEntry(const void* loc, const MappedSegment* seg, uint64_t preferedLoadAddress, std::span<const uint64_t> segOffsetTable) const override {
const dyld_chained_ptr_32_firmware_rebase* rebasePtr = (dyld_chained_ptr_32_firmware_rebase*)loc;
- return Fixup(loc, seg, rebasePtr->target);
- }
-#if BUILDING_MACHO_WRITER
- void writeChainEntry(const Fixup& fixup, const void* nextLoc, uint64_t preferedLoadAddress) const override {
+ return Fixup(loc, seg, rebasePtr->target - preferedLoadAddress);
+ }
+
+ Error writeChainEntry(const Fixup& fixup, const void* nextLoc, uint64_t preferedLoadAddress, std::span<const MappedSegment*>) const override {
intptr_t delta = (nextLoc == nullptr) ? 0 : ((uint8_t*)nextLoc - (uint8_t*)fixup.location);
dyld_chained_ptr_32_firmware_rebase* rebasePtr = (dyld_chained_ptr_32_firmware_rebase*)fixup.location;
rebasePtr->next = (uint32_t)(delta/4);
rebasePtr->target = (uint32_t)fixup.rebase.targetVmOffset;
- assert(rebasePtr->next*4 == delta);
- assert(rebasePtr->target == fixup.rebase.targetVmOffset);
- }
-#endif
+ if ( rebasePtr->next*4 != delta )
+ return badChainDistance(fixup, delta);
+ if ( rebasePtr->target != fixup.rebase.targetVmOffset )
+ return badVmOffset(fixup);
+ return Error::none();
+ }
};
@@ -1412,7 +1139,7 @@
return (void*)((uint8_t*)loc + ptr->next * 4);
}
- Fixup parseChainEntry(const void* loc, const MappedSegment* seg, uint64_t preferedLoadAddress=0) const override {
+ Fixup parseChainEntry(const void* loc, const MappedSegment* seg, uint64_t preferedLoadAddress, std::span<const uint64_t> segOffsetTable) const override {
const dyld_chained_ptr_64_kernel_cache_rebase* rebasePtr = (dyld_chained_ptr_64_kernel_cache_rebase*)loc;
if ( rebasePtr->isAuth )
return Fixup(loc, seg, rebasePtr->target, rebasePtr->key, rebasePtr->addrDiv, rebasePtr->diversity);
@@ -1420,11 +1147,11 @@
return Fixup(loc, seg, rebasePtr->target);
}
-#if BUILDING_MACHO_WRITER
- void writeChainEntry(const Fixup& fixup, const void* nextLoc, uint64_t preferedLoadAddress) const override {
+
+ Error writeChainEntry(const Fixup& fixup, const void* nextLoc, uint64_t preferedLoadAddress, std::span<const MappedSegment*>) const override {
intptr_t delta = (nextLoc == nullptr) ? 0 : ((uint8_t*)nextLoc - (uint8_t*)fixup.location);
dyld_chained_ptr_64_kernel_cache_rebase* rebasePtr = (dyld_chained_ptr_64_kernel_cache_rebase*)fixup.location;
-
+
rebasePtr->isAuth = fixup.authenticated ;
rebasePtr->next = delta/4;
rebasePtr->key = fixup.auth.key;
@@ -1432,10 +1159,12 @@
rebasePtr->diversity = fixup.auth.diversity;
rebasePtr->cacheLevel = 0; // FIXME
rebasePtr->target = fixup.rebase.targetVmOffset;
- assert(rebasePtr->next*4 == delta);
- assert(rebasePtr->target == fixup.rebase.targetVmOffset);
- }
-#endif
+ if ( rebasePtr->next*4 != delta )
+ return badChainDistance(fixup, delta);
+ if ( rebasePtr->target != fixup.rebase.targetVmOffset )
+ return badVmOffset(fixup);
+ return Error::none();
+ }
};
@@ -1465,7 +1194,7 @@
return (void*)((uint8_t*)loc + ptr->next);
}
- Fixup parseChainEntry(const void* loc, const MappedSegment* seg, uint64_t preferedLoadAddress=0) const override {
+ Fixup parseChainEntry(const void* loc, const MappedSegment* seg, uint64_t preferedLoadAddress, std::span<const uint64_t> segOffsetTable) const override {
const dyld_chained_ptr_64_kernel_cache_rebase* rebasePtr = (dyld_chained_ptr_64_kernel_cache_rebase*)loc;
if ( rebasePtr->isAuth )
return Fixup(loc, seg, rebasePtr->target, rebasePtr->key, rebasePtr->addrDiv, rebasePtr->diversity);
@@ -1473,8 +1202,8 @@
return Fixup(loc, seg, rebasePtr->target);
}
-#if BUILDING_MACHO_WRITER
- void writeChainEntry(const Fixup& fixup, const void* nextLoc, uint64_t preferedLoadAddress) const override {
+
+ Error writeChainEntry(const Fixup& fixup, const void* nextLoc, uint64_t preferedLoadAddress, std::span<const MappedSegment*>) const override {
intptr_t delta = (nextLoc == nullptr) ? 0 : ((uint8_t*)nextLoc - (uint8_t*)fixup.location);
dyld_chained_ptr_64_kernel_cache_rebase* rebasePtr = (dyld_chained_ptr_64_kernel_cache_rebase*)fixup.location;
@@ -1485,34 +1214,86 @@
rebasePtr->diversity = 0;
rebasePtr->cacheLevel = 0; // FIXME
rebasePtr->target = fixup.rebase.targetVmOffset;
- assert(rebasePtr->next == delta);
- assert(rebasePtr->target == fixup.rebase.targetVmOffset);
- }
-#endif
-};
+ if ( rebasePtr->next != delta )
+ return badChainDistance(fixup, delta);
+ if ( rebasePtr->target != fixup.rebase.targetVmOffset )
+ return badVmOffset(fixup);
+ return Error::none();
+ }
+};
+
+Error ChainedFixups::PointerFormat::badChainDistance(const Fixup& fixup, intptr_t delta) const
+{
+ return Error("distance between fixups (%ld) is not encodable in chain for fixup at %.*s+0x%0lX",
+ delta, (int)fixup.segment->segName.size(), fixup.segment->segName.data(),
+ (uintptr_t)fixup.location - (uintptr_t)fixup.segment->content);
+}
+
+Error ChainedFixups::PointerFormat::badBindOrdinal(const Fixup& fixup) const
+{
+ return Error("bind ordinal (%u) too large in fixup at %.*s+0x%0lX",
+ fixup.bind.bindOrdinal, (int)fixup.segment->segName.size(), fixup.segment->segName.data(),
+ (uintptr_t)fixup.location - (uintptr_t)fixup.segment->content);
+}
+
+Error ChainedFixups::PointerFormat::badVmOffset(const Fixup& fixup) const
+{
+ return Error("vmOffset (0x%0llX) cannot fit in fixup at %.*s+0x%0lX",
+ fixup.rebase.targetVmOffset, (int)fixup.segment->segName.size(), fixup.segment->segName.data(),
+ (uintptr_t)fixup.location - (uintptr_t)fixup.segment->content);
+}
+
+Error ChainedFixups::PointerFormat::badVmAddr(const Fixup& fixup, uint64_t baseAddress) const
+{
+ return Error("vmAddress (0x%0llX) cannot fit in fixup at %.*s+0x%0lX",
+ fixup.rebase.targetVmOffset+baseAddress, (int)fixup.segment->segName.size(), fixup.segment->segName.data(),
+ (uintptr_t)fixup.location - (uintptr_t)fixup.segment->content);
+}
+
+Error ChainedFixups::PointerFormat::badAddend(const Fixup& fixup, int64_t addend) const
+{
+ return Error("addend (%lld) cannot fit in fixup at %.*s+0x%0lX",
+ addend, (int)fixup.segment->segName.size(), fixup.segment->segName.data(),
+ (uintptr_t)fixup.location - (uintptr_t)fixup.segment->content);
+}
+
+Error ChainedFixups::PointerFormat::badSegIndexOrOffset(const Fixup& fixup, uint8_t segIndex, uint64_t segOffset) const
+{
+ return Error("segIndex (%d) and segOffset (0x%0llX) cannot fit in fixup at %.*s+0x%0lX",
+ segIndex, segOffset, (int)fixup.segment->segName.size(), fixup.segment->segName.data(),
+ (uintptr_t)fixup.location - (uintptr_t)fixup.segment->content);
+}
bool ChainedFixups::PointerFormat::valid(uint16_t pointer_format)
{
- return (pointer_format <= DYLD_CHAINED_PTR_ARM64E_SHARED_CACHE);
-}
+ return (pointer_format <= DYLD_CHAINED_PTR_ARM64E_SEGMENTED);
+}
+
+uint32_t ChainedFixups::PointerFormat::ptrAlignmentSize() const
+{
+ // most formats, including 64-bit, allow a 4-byte pointer alignment
+ return 4;
+}
+
+static const constinit PointerFormat_DYLD_CHAINED_PTR_ARM64E p1;
+static const constinit PointerFormat_DYLD_CHAINED_PTR_64 p2;
+static const constinit PointerFormat_DYLD_CHAINED_PTR_32 p3;
+static const constinit PointerFormat_DYLD_CHAINED_PTR_32_CACHE p4;
+static const constinit PointerFormat_DYLD_CHAINED_PTR_32_FIRMWARE p5;
+static const constinit PointerFormat_DYLD_CHAINED_PTR_64_OFFSET p6;
+static const constinit PointerFormat_DYLD_CHAINED_PTR_ARM64E_KERNEL p7;
+static const constinit PointerFormat_DYLD_CHAINED_PTR_64_KERNEL_CACHE p8;
+static const constinit PointerFormat_DYLD_CHAINED_PTR_ARM64E_USERLAND p9;
+static const constinit PointerFormat_DYLD_CHAINED_PTR_ARM64E_FIRMWARE p10;
+static const constinit PointerFormat_DYLD_CHAINED_PTR_X86_64_KERNEL_CACHE p11;
+static const constinit PointerFormat_DYLD_CHAINED_PTR_ARM64E_USERLAND24 p12;
+static const constinit PointerFormat_DYLD_CHAINED_PTR_ARM64E_SHARED_CACHE p13;
+static const constinit PointerFormat_DYLD_CHAINED_PTR_ARM64E_SEGMENTED p14;
const ChainedFixups::PointerFormat& ChainedFixups::PointerFormat::make(uint16_t pointer_format)
{
- static const PointerFormat_DYLD_CHAINED_PTR_ARM64E p1;
- static const PointerFormat_DYLD_CHAINED_PTR_64 p2;
- static const PointerFormat_DYLD_CHAINED_PTR_32 p3;
- static const PointerFormat_DYLD_CHAINED_PTR_32_CACHE p4;
- static const PointerFormat_DYLD_CHAINED_PTR_32_FIRMWARE p5;
- static const PointerFormat_DYLD_CHAINED_PTR_64_OFFSET p6;
- static const PointerFormat_DYLD_CHAINED_PTR_ARM64E_KERNEL p7;
- static const PointerFormat_DYLD_CHAINED_PTR_64_KERNEL_CACHE p8;
- static const PointerFormat_DYLD_CHAINED_PTR_ARM64E_USERLAND p9;
- static const PointerFormat_DYLD_CHAINED_PTR_ARM64E_FIRMWARE p10;
- static const PointerFormat_DYLD_CHAINED_PTR_X86_64_KERNEL_CACHE p11;
- static const PointerFormat_DYLD_CHAINED_PTR_ARM64E_USERLAND24 p12;
-
switch (pointer_format) {
case DYLD_CHAINED_PTR_ARM64E:
return p1;
@@ -1538,10 +1319,13 @@
return p11;
case DYLD_CHAINED_PTR_ARM64E_USERLAND24:
return p12;
+ case DYLD_CHAINED_PTR_ARM64E_SHARED_CACHE:
+ return p13;
+ case DYLD_CHAINED_PTR_ARM64E_SEGMENTED:
+ return p14;
}
assert("unknown pointer format");
return p1;
}
-
} // namespace mach_o