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1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 | /* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*- * * Copyright (c) 2018-2023 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@ */ // OS #include <sys/types.h> #include <sys/stat.h> #include <sys/mman.h> #include <stdarg.h> #include <stdio.h> #include <fcntl.h> #include <unistd.h> #include <errno.h> #include <uuid/uuid.h> #include <mach-o/dyld_introspection.h> #include <mach-o/dyld_priv.h> #include <SoftLinking/WeakLinking.h> // STL #include <vector> #include <tuple> #include <set> #include <unordered_set> #include <string> // mach_o #include "DyldSharedCache.h" #include "Header.h" #include "Version32.h" #include "Universal.h" #include "Architecture.h" #include "Image.h" #include "Error.h" #include "SplitSeg.h" #include "ChainedFixups.h" #include "FunctionStarts.h" #include "Misc.h" #include "Instructions.h" #include "FunctionVariants.h" // common #include "Defines.h" #include "FileUtils.h" #include "SymbolicatedImage.h" // other_tools #include "MiscFileUtils.h" using mach_o::Header; using mach_o::LinkedDylibAttributes; using mach_o::Version32; using mach_o::Image; using mach_o::MappedSegment; using mach_o::Fixup; using mach_o::Symbol; using mach_o::PlatformAndVersions; using mach_o::ChainedFixups; using mach_o::CompactUnwind; using mach_o::Architecture; using mach_o::SplitSegInfo; using mach_o::Error; using mach_o::Instructions; using mach_o::FunctionVariantsRuntimeTable; using mach_o::FunctionVariants; using mach_o::FunctionVariantFixups; using other_tools::SymbolicatedImage; typedef mach_o::ChainedFixups::PointerFormat PointerFormat; static void printPlatforms(const Header* header) { if ( header->isPreload() ) return; PlatformAndVersions pvs = header->platformAndVersions(); char osVers[32]; char sdkVers[32]; pvs.minOS.toString(osVers); pvs.sdk.toString(sdkVers); printf(" -platform:\n"); printf(" platform minOS sdk\n"); printf(" %15s %-7s %-7s\n", pvs.platform.name().c_str(), osVers, sdkVers); } static void printUUID(const Header* header) { printf(" -uuid:\n"); uuid_t uuid; if ( header->getUuid(uuid) ) { uuid_string_t uuidString; uuid_unparse_upper(uuid, uuidString); printf(" %s\n", uuidString); } } static void permString(uint32_t permFlags, char str[4]) { str[0] = (permFlags & VM_PROT_READ) ? 'r' : '.'; str[1] = (permFlags & VM_PROT_WRITE) ? 'w' : '.'; str[2] = (permFlags & VM_PROT_EXECUTE) ? 'x' : '.'; str[3] = '\0'; } static void printSegments(const Header* header) { if ( header->isPreload() || header->hasDiscontiguousSegments() ) { printf(" -segments:\n"); printf(" file-offset vm-addr segment section sect-size seg-size init/max-prot\n"); __block std::string_view lastSegName; header->forEachSection(^(const Header::SectionInfo& sectInfo, bool& stop) { if ( sectInfo.segmentName != lastSegName ) { uint64_t segVmSize = header->segmentVmSize(sectInfo.segIndex); char maxProtChars[8]; permString(sectInfo.segMaxProt, maxProtChars); char initProtChars[8]; permString(sectInfo.segInitProt, initProtChars); printf(" 0x%06X 0x%09llX %-16.*s %6lluKB %s/%s\n", sectInfo.fileOffset, sectInfo.address, (int)sectInfo.segmentName.size(), sectInfo.segmentName.data(), segVmSize/1024, initProtChars, maxProtChars); lastSegName = sectInfo.segmentName; } printf(" 0x%06X 0x%09llX %-16.*s %7llu\n", sectInfo.fileOffset, sectInfo.address, (int)sectInfo.sectionName.size(), sectInfo.sectionName.data(), sectInfo.size); }); } else if ( header->inDyldCache() ) { printf(" -segments:\n"); printf(" unslid-addr segment section sect-size seg-size init/max-prot\n"); __block std::string_view lastSegName; __block uint64_t segVmAddr = 0; __block uint64_t startVmAddr = header->segmentVmAddr(0); header->forEachSection(^(const Header::SectionInfo& sectInfo, bool& stop) { if ( sectInfo.segmentName != lastSegName ) { segVmAddr = header->segmentVmAddr(sectInfo.segIndex); uint64_t segVmSize = header->segmentVmSize(sectInfo.segIndex); char maxProtChars[8]; permString(sectInfo.segMaxProt, maxProtChars); char initProtChars[8]; permString(sectInfo.segInitProt, initProtChars); printf(" 0x%09llX %-16.*s %6lluKB %s/%s\n", segVmAddr, (int)sectInfo.segmentName.size(), sectInfo.segmentName.data(), segVmSize/1024, initProtChars, maxProtChars); lastSegName = sectInfo.segmentName; } printf(" 0x%09llX %-16.*s %7llu\n", startVmAddr+sectInfo.address, (int)sectInfo.sectionName.size(), sectInfo.sectionName.data(), sectInfo.size); }); } else { printf(" -segments:\n"); printf(" load-offset segment section sect-size seg-size init/max-prot\n"); __block std::string_view lastSegName; __block uint64_t textSegVmAddr = 0; header->forEachSection(^(const Header::SectionInfo& sectInfo, bool& stop) { if ( lastSegName.empty() ) { textSegVmAddr = header->segmentVmAddr(sectInfo.segIndex); } if ( sectInfo.segmentName != lastSegName ) { uint64_t segVmAddr = header->segmentVmAddr(sectInfo.segIndex); uint64_t segVmSize = header->segmentVmSize(sectInfo.segIndex); char maxProtChars[8]; permString(sectInfo.segMaxProt, maxProtChars); char initProtChars[8]; permString(sectInfo.segInitProt, initProtChars); printf(" 0x%08llX %-16.*s %6lluKB %s/%s\n", segVmAddr-textSegVmAddr, (int)sectInfo.segmentName.size(), sectInfo.segmentName.data(), segVmSize/1024, initProtChars,maxProtChars); lastSegName = sectInfo.segmentName; } printf(" 0x%08llX %-16.*s %6llu\n", sectInfo.address, (int)sectInfo.sectionName.size(), sectInfo.sectionName.data(), sectInfo.size); }); } } static void printLinkedDylibs(const Header* mh) { if ( mh->isPreload() ) return; printf(" -linked_dylibs:\n"); printf(" attributes load path\n"); mh->forEachLinkedDylib(^(const char* loadPath, LinkedDylibAttributes depAttrs, Version32 compatVersion, Version32 curVersion, bool synthesizedLink, bool& stop) { if ( synthesizedLink ) return; std::string attributes; if ( depAttrs.upward ) attributes += "upward "; if ( depAttrs.delayInit ) attributes += "delay-init "; if ( depAttrs.weakLink ) attributes += "weak-link "; if ( depAttrs.reExport ) attributes += "re-export "; printf(" %-12s %s\n", attributes.c_str(), loadPath); }); } static void printInitializers(const Image& image) { printf(" -inits:\n"); SymbolicatedImage symImage(image); // print static initializers bool contentRebased = false; image.forEachInitializer(contentRebased, ^(uint32_t initOffset) { uint64_t unslidInitAddr = image.header()->preferredLoadAddress() + initOffset; Symbol symbol; uint64_t addend = 0; const char* initName = symImage.symbolNameAt(initOffset); if ( initName == nullptr ) { if ( image.symbolTable().findClosestDefinedSymbol(unslidInitAddr, symbol) ) { initName = symbol.name().c_str(); uint64_t symbolAddr = image.header()->preferredLoadAddress() + symbol.implOffset(); addend = unslidInitAddr - symbolAddr; } } if ( initName == nullptr ) initName = ""; if ( addend == 0 ) printf(" 0x%08X %s\n", initOffset, initName); else printf(" 0x%08X %s + %llu\n", initOffset, initName, addend); }); // print static terminators if ( !image.header()->isArch("arm64e") ) { image.forEachClassicTerminator(contentRebased, ^(uint32_t termOffset) { uint64_t unslidInitAddr = image.header()->preferredLoadAddress() + termOffset; Symbol symbol; uint64_t addend = 0; const char* termName = symImage.symbolNameAt(termOffset); if ( termName == nullptr ) { if ( image.symbolTable().findClosestDefinedSymbol(unslidInitAddr, symbol) ) { termName = symbol.name().c_str(); uint64_t symbolAddr = image.header()->preferredLoadAddress() + symbol.implOffset(); addend = unslidInitAddr - symbolAddr; } } if ( termName == nullptr ) termName = ""; if ( addend == 0 ) printf(" 0x%08X %s [terminator]\n", termOffset, termName); else printf(" 0x%08X %s + %llu [terminator]\n", termOffset, termName, addend); }); } // print +load methods // TODO: rdar://122190141 (Enable +load initializers in dyld_info) #if !INTERNAL_BUILD if ( image.header()->hasObjC() ) { const SymbolicatedImage* symImagePtr = &symImage; // for no copy in block... symImage.forEachDefinedObjCClass(^(uint64_t classVmAddr) { const char* classname = symImagePtr->className(classVmAddr); uint64_t metaClassVmaddr = symImagePtr->metaClassVmAddr(classVmAddr); symImagePtr->forEachMethodInClass(metaClassVmaddr, ^(const char* methodName, uint64_t implAddr) { if ( strcmp(methodName, "load") == 0 ) printf(" 0x%08llX +[%s %s]\n", implAddr, classname, methodName); }); }); symImage.forEachObjCCategory(^(uint64_t categoryVmAddr) { const char* catname = symImagePtr->categoryName(categoryVmAddr); const char* classname = symImagePtr->categoryClassName(categoryVmAddr); symImagePtr->forEachMethodInCategory(categoryVmAddr, ^(const char* instanceMethodName, uint64_t implAddr) {}, ^(const char* classMethodName, uint64_t implAddr) { if ( strcmp(classMethodName, "load") == 0 ) printf(" 0x%08llX +[%s(%s) %s]\n", implAddr, classname, catname, classMethodName); }); }); } #endif } static void printChainInfo(const Image& image) { printf(" -fixup_chains:\n"); uint16_t fwPointerFormat; uint32_t fwStartsCount; const uint32_t* fwStarts; if ( image.hasChainedFixups() ) { const ChainedFixups& chainedFixups = image.chainedFixups(); if ( const dyld_chained_fixups_header* chainHeader = (dyld_chained_fixups_header*)chainedFixups.linkeditHeader() ) { printf(" fixups_version: 0x%08X\n", chainHeader->fixups_version); printf(" starts_offset: 0x%08X\n", chainHeader->starts_offset); printf(" imports_offset: 0x%08X\n", chainHeader->imports_offset); printf(" symbols_offset: 0x%08X\n", chainHeader->symbols_offset); printf(" imports_count: %d\n", chainHeader->imports_count); printf(" imports_format: %d (%s)\n", chainHeader->imports_format, ChainedFixups::importsFormatName(chainHeader->imports_format)); printf(" symbols_format: %d\n", chainHeader->symbols_format); const dyld_chained_starts_in_image* starts = (dyld_chained_starts_in_image*)((uint8_t*)chainHeader + chainHeader->starts_offset); for (int i=0; i < starts->seg_count; ++i) { if ( starts->seg_info_offset[i] == 0 ) continue; const dyld_chained_starts_in_segment* seg = (dyld_chained_starts_in_segment*)((uint8_t*)starts + starts->seg_info_offset[i]); if ( seg->page_count == 0 ) continue; const uint8_t* segEnd = ((uint8_t*)seg + seg->size); const PointerFormat& pf = PointerFormat::make(seg->pointer_format); printf(" seg[%d]:\n", i); printf(" page_size: 0x%04X\n", seg->page_size); printf(" pointer_format: %d (%s)(%s)\n", seg->pointer_format, pf.name(), pf.description()); printf(" segment_offset: 0x%08llX\n", seg->segment_offset); printf(" max_pointer: 0x%08X\n", seg->max_valid_pointer); printf(" pages: %d\n", seg->page_count); for (int pageIndex=0; pageIndex < seg->page_count; ++pageIndex) { if ( (uint8_t*)(&seg->page_start[pageIndex]) >= segEnd ) { printf(" start[% 2d]: <<<off end of dyld_chained_starts_in_segment>>>\n", pageIndex); continue; } uint16_t offsetInPage = seg->page_start[pageIndex]; if ( offsetInPage == DYLD_CHAINED_PTR_START_NONE ) continue; if ( offsetInPage & DYLD_CHAINED_PTR_START_MULTI ) { // 32-bit chains which may need multiple starts per page uint32_t overflowIndex = offsetInPage & ~DYLD_CHAINED_PTR_START_MULTI; bool chainEnd = false; while (!chainEnd) { chainEnd = (seg->page_start[overflowIndex] & DYLD_CHAINED_PTR_START_LAST); offsetInPage = (seg->page_start[overflowIndex] & ~DYLD_CHAINED_PTR_START_LAST); printf(" start[% 2d]: 0x%04X\n", pageIndex, offsetInPage); ++overflowIndex; } } else { // one chain per page printf(" start[% 2d]: 0x%04X\n", pageIndex, offsetInPage); } } } } } else if ( image.header()->hasFirmwareChainStarts(&fwPointerFormat, &fwStartsCount, &fwStarts) ) { const ChainedFixups::PointerFormat& pf = ChainedFixups::PointerFormat::make(fwPointerFormat); printf(" pointer_format: %d (%s)\n", fwPointerFormat, pf.description()); for (uint32_t i=0; i < fwStartsCount; ++i) { const uint32_t startVmOffset = fwStarts[i]; printf(" start[% 2d]: vm offset: 0x%04X\n", i, startVmOffset); } } } static void printImports(const Image& image) { printf(" -imports:\n"); __block uint32_t bindOrdinal = 0; if ( image.hasChainedFixups() ) { image.chainedFixups().forEachBindTarget(^(const Fixup::BindTarget& target, bool& stop) { char buffer[128]; const char* weakStr = (target.weakImport ? "[weak-import]" : ""); if ( target.addend == 0 ) printf(" 0x%04X %s %s (from %s)\n", bindOrdinal, target.symbolName.c_str(), weakStr, SymbolicatedImage::libOrdinalName(image.header(), target.libOrdinal, buffer)); else printf(" 0x%04X %s+0x%llX %s (from %s)\n", bindOrdinal, target.symbolName.c_str(), target.addend, weakStr, SymbolicatedImage::libOrdinalName(image.header(), target.libOrdinal, buffer)); ++bindOrdinal; }); } else if ( image.hasSymbolTable() ) { image.symbolTable().forEachUndefinedSymbol(^(const Symbol& symbol, uint32_t symIndex, bool& stop) { int libOrdinal; bool weakImport; if ( symbol.isUndefined(libOrdinal, weakImport) ) { char buffer[128]; const char* weakStr = (weakImport ? "[weak-import]" : ""); printf(" %s %s (from %s)\n", symbol.name().c_str(), weakStr, SymbolicatedImage::libOrdinalName(image.header(), libOrdinal, buffer)); } }); } } static void printChainDetails(const Image& image) { printf(" -fixup_chain_details:\n"); uint16_t fwPointerFormat; uint32_t fwStartsCount; const uint32_t* fwStarts; uint64_t prefLoadAddr = image.header()->preferredLoadAddress(); if ( image.hasChainedFixups() ) { image.withSegments(^(std::span<const MappedSegment> segments) { image.chainedFixups().forEachFixupChainStartLocation(segments, ^(const void* chainStart, uint32_t segIndex, uint32_t pageIndex, uint32_t pageSize, const ChainedFixups::PointerFormat& pf, bool& stop) { pf.forEachFixupLocationInChain(chainStart, prefLoadAddr, &segments[segIndex], {}, pageIndex, pageSize, ^(const Fixup& info, bool& stop2) { uint64_t vmOffset = (uint8_t*)info.location - (uint8_t*)image.header(); const void* nextLoc = pf.nextLocation(info.location); uint32_t next = 0; if ( nextLoc != nullptr ) next = (uint32_t)((uint8_t*)nextLoc - (uint8_t*)info.location)/pf.minNext(); if ( info.isBind ) { if ( image.header()->is64() ) { const char* authPrefix = " "; char authInfoStr[128] = ""; if ( info.authenticated ) { authPrefix = "auth-"; snprintf(authInfoStr, sizeof(authInfoStr), "key: %s, addrDiv: %d, diversity: 0x%04X, ", info.keyName(), info.auth.usesAddrDiversity, info.auth.diversity); } char addendInfo[32] = ""; if ( info.bind.embeddedAddend != 0 ) snprintf(addendInfo, sizeof(addendInfo), ", addend: %d", info.bind.embeddedAddend); printf(" 0x%08llX: raw: 0x%016llX %sbind: (next: %03d, %sbindOrdinal: 0x%06X%s)\n", vmOffset, *((uint64_t*)info.location), authPrefix, next, authInfoStr, info.bind.bindOrdinal, addendInfo); } else { printf(" 0x%08llX: raw: 0x%08X bind: (next: %02d bindOrdinal: 0x%07X)\n", vmOffset, *((uint32_t*)info.location), next, info.bind.bindOrdinal); } } else { uint8_t high8 = 0; // FIXME: if ( image.header()->is64() ) { const char* authPrefix = " "; char authInfoStr[128] = ""; if ( info.authenticated ) { authPrefix = "auth-"; snprintf(authInfoStr, sizeof(authInfoStr), "key: %s, addrDiv: %d, diversity: 0x%04X, ", info.keyName(), info.auth.usesAddrDiversity, info.auth.diversity); } char high8Info[32] = ""; if ( high8 != 0 ) snprintf(high8Info, sizeof(high8Info), ", high8: 0x%02X", high8); printf(" 0x%08llX: raw: 0x%016llX %srebase: (next: %03d, %starget: 0x%011llX%s)\n", vmOffset, *((uint64_t*)info.location), authPrefix, next, authInfoStr, info.rebase.targetVmOffset, high8Info); } else { printf(" 0x%08llX: raw: 0x%08X rebase: (next: %02d target: 0x%07llX)\n", vmOffset, *((uint32_t*)info.location), next, info.rebase.targetVmOffset); } } }); }); }); } else if ( image.header()->hasFirmwareChainStarts(&fwPointerFormat, &fwStartsCount, &fwStarts) ) { image.forEachFixup(^(const Fixup& info, bool& stop) { uint64_t segOffset = (uint8_t*)info.location - (uint8_t*)info.segment->content; uint64_t vmAddr = prefLoadAddr + info.segment->runtimeOffset + segOffset; uint8_t high8 = 0; // FIXME: if ( image.header()->is64() ) { const char* authPrefix = " "; char authInfoStr[128] = ""; if ( info.authenticated ) { authPrefix = "auth-"; snprintf(authInfoStr, sizeof(authInfoStr), "key: %s, addrDiv: %d, diversity: 0x%04X, ", info.keyName(), info.auth.usesAddrDiversity, info.auth.diversity); } char high8Info[32] = ""; if ( high8 != 0 ) snprintf(high8Info, sizeof(high8Info), ", high8: 0x%02X", high8); printf(" 0x%08llX: raw: 0x%016llX %srebase: (%starget: 0x%011llX%s)\n", vmAddr, *((uint64_t*)info.location), authPrefix, authInfoStr, info.rebase.targetVmOffset, high8Info); } else { printf(" 0x%08llX: raw: 0x%08X rebase: (target: 0x%07llX)\n", vmAddr, *((uint32_t*)info.location), info.rebase.targetVmOffset); } }); } } static void printChainHeader(const Image& image) { printf(" -fixup_chain_header:\n"); uint16_t fwPointerFormat; uint32_t fwStartsCount; const uint32_t* fwStarts; if ( image.hasChainedFixups() ) { const ChainedFixups& chainedFixups = image.chainedFixups(); if ( const dyld_chained_fixups_header* chainsHeader = chainedFixups.linkeditHeader() ) { printf(" dyld_chained_fixups_header:\n"); printf(" fixups_version 0x%08X\n", chainsHeader->fixups_version); printf(" starts_offset 0x%08X\n", chainsHeader->starts_offset); printf(" imports_offset 0x%08X\n", chainsHeader->imports_offset); printf(" symbols_offset 0x%08X\n", chainsHeader->symbols_offset); printf(" imports_count 0x%08X\n", chainsHeader->imports_count); printf(" imports_format 0x%08X\n", chainsHeader->imports_format); printf(" symbols_format 0x%08X\n", chainsHeader->symbols_format); const dyld_chained_starts_in_image* starts = (dyld_chained_starts_in_image*)((uint8_t*)chainsHeader + chainsHeader->starts_offset); printf(" dyld_chained_starts_in_image:\n"); printf(" seg_count 0x%08X\n", starts->seg_count); for ( uint32_t i = 0; i != starts->seg_count; ++i ) printf(" seg_info_offset[%d] 0x%08X\n", i, starts->seg_info_offset[i]); for (uint32_t segIndex = 0; segIndex < starts->seg_count; ++segIndex) { if ( starts->seg_info_offset[segIndex] == 0 ) continue; printf(" dyld_chained_starts_in_segment:\n"); const dyld_chained_starts_in_segment* segInfo = (dyld_chained_starts_in_segment*)((uint8_t*)starts + starts->seg_info_offset[segIndex]); printf(" size 0x%08X\n", segInfo->size); printf(" page_size 0x%08X\n", segInfo->page_size); printf(" pointer_format 0x%08X\n", segInfo->pointer_format); printf(" segment_offset 0x%08llX\n", segInfo->segment_offset); printf(" max_valid_pointer 0x%08X\n", segInfo->max_valid_pointer); printf(" page_count 0x%08X\n", segInfo->page_count); } printf(" targets:\n"); chainedFixups.forEachBindTarget(^(const Fixup::BindTarget& target, bool& stop) { printf(" symbol %s\n", target.symbolName.c_str()); }); } } else if ( image.header()->hasFirmwareChainStarts(&fwPointerFormat, &fwStartsCount, &fwStarts) ) { const ChainedFixups::PointerFormat& pf = ChainedFixups::PointerFormat::make(fwPointerFormat); printf(" firmware chains:\n"); printf(" pointer_format: %d (%s)\n", fwPointerFormat, pf.description()); } } static void printSymbolicFixups(const Image& image) { printf(" -symbolic_fixups:\n"); SymbolicatedImage symImage(image); uint64_t lastSymbolBaseAddr = 0; for (size_t i=0; i < symImage.fixupCount(); ++i) { CString inSymbolName = symImage.fixupInSymbol(i); uint64_t inSymbolAddress = symImage.fixupAddress(i); uint32_t inSymbolOffset = symImage.fixupInSymbolOffset(i); uint64_t inSymbolBaseAddr = inSymbolAddress - inSymbolOffset; if ( inSymbolBaseAddr != lastSymbolBaseAddr ) printf("%s:\n", inSymbolName.c_str()); char targetStr[4096]; printf(" +0x%04X %11s %s\n", inSymbolOffset, symImage.fixupTypeString(i), symImage.fixupTargetString(i, true, targetStr)); lastSymbolBaseAddr = inSymbolBaseAddr; } } static void printExports(const Image& image) { printf(" -exports:\n"); printf(" offset symbol\n"); if ( image.hasExportsTrie() ) { image.exportsTrie().forEachExportedSymbol(^(const Symbol& symbol, bool& stop) { uint64_t resolverFuncOffset; uint64_t absAddress; int libOrdinal; uint32_t fvtIndex; const char* importName; const char* symbolName = symbol.name().c_str(); if ( symbol.isReExport(libOrdinal, importName) ) { char buffer[128]; if ( strcmp(importName, symbolName) == 0 ) printf(" [re-export] %s (from %s)\n", symbolName, SymbolicatedImage::libOrdinalName(image.header(), libOrdinal, buffer)); else printf(" [re-export] %s (%s from %s)\n", symbolName, importName, SymbolicatedImage::libOrdinalName(image.header(), libOrdinal, buffer)); } else if ( symbol.isAbsolute(absAddress) ) { printf(" 0x%08llX %s [absolute]\n", absAddress, symbolName); } else if ( symbol.isThreadLocal() ) { printf(" 0x%08llX %s [per-thread]\n", symbol.implOffset(), symbolName); } else if ( symbol.isFunctionVariant(fvtIndex) ) { printf(" 0x%08llX %s [function-variants-table#%d]\n", symbol.implOffset(), symbolName, fvtIndex); } else if ( symbol.isDynamicResolver(resolverFuncOffset) ) { printf(" 0x%08llX %s [dynamic-resolver=0x%08llX]\n", symbol.implOffset(), symbolName, resolverFuncOffset); } else if ( symbol.isWeakDef() ) { printf(" 0x%08llX %s [weak-def]\n", symbol.implOffset(), symbolName); } else { printf(" 0x%08llX %s\n", symbol.implOffset(), symbolName); } }); } else if ( image.hasSymbolTable() ) { image.symbolTable().forEachExportedSymbol(^(const Symbol& symbol, uint32_t symIndex, bool& stop) { const char* symbolName = symbol.name().c_str(); uint64_t absAddress; if ( symbol.isAbsolute(absAddress) ) { printf(" 0x%08llX %s [absolute]\n", absAddress, symbolName); } else if ( symbol.isWeakDef() ) { printf(" 0x%08llX %s [weak-def]\n", symbol.implOffset(), symbolName); } else { printf(" 0x%08llX %s\n", symbol.implOffset(), symbolName); } }); } else { printf("no exported symbol information\n"); } } static void printFixups(const Image& image) { printf(" -fixups:\n"); SymbolicatedImage symImage(image); printf(" segment section address type target\n"); for (size_t i=0; i < symImage.fixupCount(); ++i) { char targetStr[4096]; uint8_t sectNum = symImage.fixupSectNum(i); std::string_view segName = symImage.fixupSegment(sectNum); std::string_view sectName = symImage.fixupSection(sectNum); printf(" %-12.*s %-16.*s 0x%08llX %12s %s\n", (int)segName.size(), segName.data(), (int)sectName.size(), sectName.data(), symImage.fixupAddress(i), symImage.fixupTypeString(i), symImage.fixupTargetString(i, false, targetStr)); } if ( image.hasFunctionVariantFixups() ) { image.functionVariantFixups().forEachFixup(^(FunctionVariantFixups::InternalFixup fixupInfo) { uint64_t address = image.segment(fixupInfo.segIndex).runtimeOffset + fixupInfo.segOffset + image.header()->preferredLoadAddress(); __block uint32_t sectNum = 1; image.header()->forEachSection(^(const Header::SectionInfo& sectInfo, bool& stop) { if ( (sectInfo.address <= address) && (address < sectInfo.address+sectInfo.size) ) { stop = true; return; } ++sectNum; }); const char* kindStr = "variant"; const char* extras = ""; char authInfoStr[128]; if ( fixupInfo.pacAuth ) { kindStr = "auth-variant"; snprintf(authInfoStr, sizeof(authInfoStr), " (div=0x%04X ad=%d key=%s)", fixupInfo.pacDiversity, fixupInfo.pacAddress, mach_o::Fixup::keyName(fixupInfo.pacKey)); extras = authInfoStr; } printf(" %-12s %-16s 0x%08llX %12s table #%d %s\n", image.segment(fixupInfo.segIndex).segName.data(), symImage.fixupSection(sectNum).data(), address, kindStr, fixupInfo.variantIndex, extras); }); } } static void printLoadCommands(const Image& image) { printf(" -load_commands:\n"); image.header()->printLoadCommands(stdout); } static void printObjC(const Image& image) { printf(" -objc:\n"); if ( image.header()->inDyldCache() ) { printf(" warning: cannot print live objc info from dylibs in dyld shared cache\n"); return; } // build list of all fixups SymbolicatedImage symInfo(image); if ( symInfo.fairplayEncryptsSomeObjcStrings() ) printf(" warning: FairPlay encryption of __TEXT will make printing ObjC info unreliable\n"); symInfo.forEachDefinedObjCClass(^(uint64_t classVmAddr) { char protocols[1024]; const char* classname = symInfo.className(classVmAddr); const char* supername = symInfo.superClassName(classVmAddr); symInfo.getClassProtocolNames(classVmAddr, protocols); printf(" @interface %s : %s %s\n", classname, supername, protocols); // walk instance methods symInfo.forEachMethodInClass(classVmAddr, ^(const char* methodName, uint64_t implAddr) { printf(" 0x%08llX -[%s %s]\n", implAddr, classname, methodName); }); // walk class methods uint64_t metaClassVmaddr = symInfo.metaClassVmAddr(classVmAddr); symInfo.forEachMethodInClass(metaClassVmaddr, ^(const char* methodName, uint64_t implAddr) { printf(" 0x%08llX +[%s %s]\n", implAddr, classname, methodName); }); printf(" @end\n"); }); symInfo.forEachObjCCategory(^(uint64_t categoryVmAddr) { const char* catname = symInfo.categoryName(categoryVmAddr); const char* classname = symInfo.categoryClassName(categoryVmAddr); printf(" @interface %s(%s)\n", classname, catname); symInfo.forEachMethodInCategory(categoryVmAddr, ^(const char* methodName, uint64_t implAddr) { printf(" 0x%08llX -[%s %s]\n", implAddr, classname, methodName); }, ^(const char* methodName, uint64_t implAddr) { printf(" 0x%08llX +[%s %s]\n", implAddr, classname, methodName); }); printf(" @end\n"); }); symInfo.forEachObjCProtocol(^(uint64_t protocolVmAddr) { char protocols[1024]; const char* protocolname = symInfo.protocolName(protocolVmAddr); symInfo.getProtocolProtocolNames(protocolVmAddr, protocols); printf(" @protocol %s : %s\n", protocolname, protocols); symInfo.forEachMethodInProtocol(protocolVmAddr, ^(const char* methodName) { printf(" -[%s %s]\n", protocolname, methodName); }, ^(const char* methodName) { printf(" +[%s %s]\n", protocolname, methodName); }, ^(const char* methodName) { printf(" -[%s %s]\n", protocolname, methodName); }, ^(const char* methodName) { printf(" +[%s %s]\n", protocolname, methodName); }); printf(" @end\n"); }); } #if 0 static void printSwiftProtocolConformances(const dyld3::MachOAnalyzer* ma, const DyldSharedCache* dyldCache, size_t cacheLen) { Diagnostics diag; __block std::vector<std::string> chainedFixupTargets; ma->forEachChainedFixupTarget(diag, ^(int libOrdinal, const char *symbolName, uint64_t addend, bool weakImport, bool &stop) { chainedFixupTargets.push_back(symbolName); }); printf(" -swift-proto:\n"); printf(" address protocol-target type-descriptor-target\n"); uint64_t loadAddress = ma->preferredLoadAddress(); uint64_t sharedCacheRelativeSelectorBaseVMAddress = dyldCache->sharedCacheRelativeSelectorBaseVMAddress(); __block metadata_visitor::SwiftVisitor swiftVisitor(dyldCache, ma, VMAddress(sharedCacheRelativeSelectorBaseVMAddress)); swiftVisitor.forEachProtocolConformance(^(const metadata_visitor::SwiftConformance &swiftConformance, bool &stopConformance) { VMAddress protocolConformanceVMAddr = swiftConformance.getVMAddress(); metadata_visitor::SwiftPointer protocolPtr = swiftConformance.getProtocolPointer(swiftVisitor); metadata_visitor::SwiftConformance::SwiftTypeRefPointer typeRef = swiftConformance.getTypeRef(swiftVisitor); metadata_visitor::SwiftPointer typePtr = typeRef.getTargetPointer(swiftVisitor); const char* protocolConformanceFixup = ""; const char* protocolFixup = ""; const char* typeDescriptorFixup = ""; uint64_t protocolRuntimeOffset = protocolPtr.targetValue.vmAddress().rawValue() - loadAddress; uint64_t typeRefRuntimeOffset = typePtr.targetValue.vmAddress().rawValue() - loadAddress; // If we have indirect fixups, see if we can find the names if ( !protocolPtr.isDirect ) { uint8_t* fixup = (uint8_t*)ma + protocolRuntimeOffset; const auto* fixupLoc = (const ChainedFixupPointerOnDisk*)fixup; uint32_t bindOrdinal = 0; int64_t addend = 0; if ( fixupLoc->isBind(DYLD_CHAINED_PTR_ARM64E_USERLAND, bindOrdinal, addend) ) { protocolFixup = chainedFixupTargets[bindOrdinal].c_str(); } } if ( !typePtr.isDirect ) { uint8_t* fixup = (uint8_t*)ma + typeRefRuntimeOffset; const auto* fixupLoc = (const ChainedFixupPointerOnDisk*)fixup; uint32_t bindOrdinal = 0; int64_t addend = 0; if ( fixupLoc->isBind(DYLD_CHAINED_PTR_ARM64E_USERLAND, bindOrdinal, addend) ) { protocolFixup = chainedFixupTargets[bindOrdinal].c_str(); } } printf(" 0x%016llX(%s) %s0x%016llX(%s) %s0x%016llX(%s)\n", protocolConformanceVMAddr.rawValue(), protocolConformanceFixup, protocolPtr.isDirect ? "" : "*", protocolRuntimeOffset, protocolFixup, typePtr.isDirect ? "" : "*", typeRefRuntimeOffset, typeDescriptorFixup); }); } #endif static void printSharedRegion(const Image& image) { printf(" -shared_region:\n"); if ( !image.hasSplitSegInfo() ) { printf(" no shared region info\n"); return; } const SplitSegInfo& splitSeg = image.splitSegInfo(); if ( splitSeg.isV1() ) { printf(" shared region v1\n"); return; } if ( splitSeg.hasMarker() ) { printf(" no shared region info (marker present)\n"); return; } __block std::vector<std::pair<std::string, std::string>> sectionNames; __block std::vector<uint64_t> sectionVMAddrs; sectionNames.emplace_back("",""); sectionVMAddrs.push_back(0); image.header()->forEachSection(^(const Header::SectionInfo& sectInfo, bool& stop) { sectionNames.emplace_back(sectInfo.segmentName, sectInfo.sectionName); sectionVMAddrs.push_back(sectInfo.address); }); printf(" from to\n"); Error err = splitSeg.forEachReferenceV2(^(const SplitSegInfo::Entry& entry, bool& stop) { std::string_view fromSegmentName = sectionNames[(uint32_t)entry.fromSectionIndex].first; std::string_view fromSectionName = sectionNames[(uint32_t)entry.fromSectionIndex].second; std::string_view toSegmentName = sectionNames[(uint32_t)entry.toSectionIndex].first; std::string_view toSectionName = sectionNames[(uint32_t)entry.toSectionIndex].second; uint64_t fromVMAddr = sectionVMAddrs[(uint32_t)entry.fromSectionIndex] + entry.fromSectionOffset; uint64_t toVMAddr = sectionVMAddrs[(uint32_t)entry.toSectionIndex] + entry.toSectionOffset; printf(" %-16s %-16s 0x%08llx %-16s %-16s 0x%08llx\n", fromSegmentName.data(), fromSectionName.data(), fromVMAddr, toSegmentName.data(), toSectionName.data(), toVMAddr); }); } static void printFunctionStarts(const Image& image) { printf(" -function_starts:\n"); SymbolicatedImage symImage(image); if ( image.hasFunctionStarts() ) { uint64_t loadAddress = image.header()->preferredLoadAddress(); image.functionStarts().forEachFunctionStart(loadAddress, ^(uint64_t addr) { const char* name = symImage.symbolNameAt(addr); if ( name == nullptr ) name = ""; printf(" 0x%08llX %s\n", addr, name); }); } else { printf(" no function starts info\n"); } } static void printOpcodes(const Image& image) { printf(" -opcodes:\n"); if ( image.hasRebaseOpcodes() ) { printf(" rebase opcodes:\n"); image.rebaseOpcodes().printOpcodes(stdout, 10); } else { printf(" no rebase opcodes\n"); } if ( image.hasBindOpcodes() ) { printf(" bind opcodes:\n"); image.bindOpcodes().printOpcodes(stdout, 10); } else { printf(" no bind opcodes\n"); } if ( image.hasLazyBindOpcodes() ) { printf(" lazy bind opcodes:\n"); image.lazyBindOpcodes().printOpcodes(stdout, 10); } else { printf(" no lazy bind opcodes\n"); } // FIXME: add support for weak binds } static void printUnwindTable(const Image& image) { printf(" -unwind:\n"); if ( image.hasCompactUnwind() ) { printf(" address encoding\n"); uint64_t loadAddress = image.header()->preferredLoadAddress(); const CompactUnwind& cu = image.compactUnwind(); cu.forEachUnwindInfo(^(const CompactUnwind::UnwindInfo& info) { const void* funcBytes = (uint8_t*)image.header() + info.funcOffset; char encodingString[128]; cu.encodingToString(info.encoding, funcBytes, encodingString); char lsdaString[32]; lsdaString[0] = '\0'; if ( info.lsdaOffset != 0 ) snprintf(lsdaString, sizeof(lsdaString), " lsdaOffset=0x%08X", info.lsdaOffset); printf(" 0x%08llX 0x%08X (%-56s)%s\n", info.funcOffset + loadAddress, info.encoding, encodingString, lsdaString); }); } else { printf(" no compact unwind table\n"); } } static void dumpHex(SymbolicatedImage& symImage, const Header::SectionInfo& sectInfo, size_t sectNum) { const uint8_t* sectionContent = symImage.content(sectInfo); const uint8_t* bias = sectionContent - (long)sectInfo.address; uint8_t sectType = (sectInfo.flags & SECTION_TYPE); bool isZeroFill = ((sectType == S_ZEROFILL) || (sectType == S_THREAD_LOCAL_ZEROFILL)); symImage.forEachSymbolRangeInSection(sectNum, ^(const char* symbolName, uint64_t symbolAddr, uint64_t size) { if ( symbolName != nullptr ) { if ( (symbolAddr == sectInfo.address) && (strchr(symbolName, ',') != nullptr) ) { // don't print synthesized name for section start (e.g. "__DATA_CONST,__auth_ptr") } else { printf("%s:\n", symbolName); } } for (int i=0; i < size; ++i) { if ( (i & 0xF) == 0 ) printf("0x%08llX: ", symbolAddr+i); uint8_t byte = (isZeroFill ? 0 : bias[symbolAddr + i]); printf("%02X ", byte); if ( (i & 0xF) == 0xF ) printf("\n"); } if ( (size & 0xF) != 0x0 ) printf("\n"); }); } static void disassembleSection(SymbolicatedImage& symImage, const Header::SectionInfo& sectInfo, size_t sectNum) { #if HAVE_LIBLTO symImage.loadDisassembler(); if ( symImage.llvmRef() != nullptr ) { LLVMDisasmContextRef llvmThumbRef = symImage.llvmThumbRef(); // disassemble content const uint8_t* sectionContent = symImage.content(sectInfo); const uint8_t* sectionContentEnd = sectionContent + sectInfo.size; const uint8_t* curContent = sectionContent; uint64_t curPC = sectInfo.address; symImage.setSectionContentBias(sectionContent - sectInfo.address); while ( curContent < sectionContentEnd ) { // add label if there is one for this PC bool isThumb = false; { const char* symName = nullptr; if ( llvmThumbRef ) { // when we have a separate thumb disassembler find the symbol // name as well as its thumb flag SymbolicatedImage::SymbolLoc loc = symImage.findClosestSymbol(curPC); isThumb = loc.isThumb; if ( !loc.name.empty() && loc.inSymbolOffset == 0 ) symName = loc.name.c_str(); } else { symName = symImage.symbolNameAt(curPC); } if ( symName ) printf("%s:\n", symName); } char line[256]; size_t len; if ( isThumb && llvmThumbRef ) { len = LLVMDisasmInstruction(llvmThumbRef, (uint8_t*)curContent, sectInfo.size, curPC, line, sizeof(line)); } else { len = LLVMDisasmInstruction(symImage.llvmRef(), (uint8_t*)curContent, sectInfo.size, curPC, line, sizeof(line)); } // llvm disassembler uses tabs to align operands, but that can look wonky, so convert to aligned spaces char instruction[16]; char operands[256]; char comment[256]; comment[0] = '\0'; if ( len == 0 ) { uint32_t value32; strcpy(instruction, ".long"); memcpy(&value32, curContent, 4); snprintf(operands, sizeof(operands), "0x%08X", value32); //printf("0x%08llX \t.long\t0x%08X\n", curPC, value32); len = 4; } else { // parse: "\tinstr\toperands" if ( char* secondTab = strchr(&line[1],'\t') ) { size_t instrLen = secondTab - &line[1]; if ( instrLen < sizeof(instruction) ) { memcpy(instruction, &line[1], instrLen); instruction[instrLen] = '\0'; } // llvm diassembler addens wonky comments like "literal pool symbol address", improve wording strlcpy(operands, &line[instrLen+2], sizeof(operands)); if ( char* literalComment = strstr(operands, "; literal pool symbol address: ") ) { strlcpy(comment, "; ", sizeof(comment)); strlcat(comment, literalComment+31,sizeof(comment)); literalComment[0] = '\0'; // truncate operands } else if ( char* literalComment2 = strstr(operands, "## literal pool symbol address: ") ) { strlcpy(comment, "; ", sizeof(comment)); strlcat(comment, literalComment2+32,sizeof(comment)); literalComment2[0] = '\0'; // truncate operands } else if ( char* literalComment3 = strstr(operands, "## literal pool for: ") ) { strlcpy(comment, "; string literal: ", sizeof(comment)); strlcat(comment, literalComment3+21,sizeof(comment)); literalComment3[0] = '\0'; // truncate operands } else if ( char* numberComment = strstr(operands, "; 0x") ) { strlcpy(comment, numberComment, sizeof(comment)); numberComment[0] = '\0'; // truncate operands } } else { strlcpy(instruction, &line[1], sizeof(instruction)); operands[0] = '\0'; } printf("0x%09llX %-8s %-20s %s\n", curPC, instruction, operands, comment); } curContent += len; curPC += len; } return; } #endif // disassembler not available, dump code in hex dumpHex(symImage, sectInfo, sectNum); } static void printQuotedString(const char* str) { if ( (strchr(str, '\n') != nullptr) || (strchr(str, '\t') != nullptr) ) { printf("\""); for (const char* s=str; *s != '\0'; ++s) { if ( *s == '\n' ) printf("\\n"); else if ( *s == '\t' ) printf("\\t"); else printf("%c", *s); } printf("\""); } else { printf("\"%s\"", str); } } static void dumpCStrings(const SymbolicatedImage& symInfo, const Header::SectionInfo& sectInfo) { const char* sectionContent = (char*)symInfo.content(sectInfo); const char* stringStart = sectionContent; for (int i=0; i < sectInfo.size; ++i) { if ( sectionContent[i] == '\0' ) { if ( *stringStart != '\0' ) { printf("0x%08llX ", sectInfo.address + i); printQuotedString(stringStart); printf("\n"); } stringStart = §ionContent[i+1]; } } } static void dumpCFStrings(const SymbolicatedImage& symInfo, const Header::SectionInfo& sectInfo) { const size_t cfStringSize = symInfo.is64() ? 32 : 16; const uint8_t* sectionContent = symInfo.content(sectInfo); const uint8_t* sectionContentEnd = sectionContent + sectInfo.size; const uint8_t* curContent = sectionContent; uint64_t curAddr = sectInfo.address; while ( curContent < sectionContentEnd ) { printf("0x%08llX\n", curAddr); const Fixup::BindTarget* bindTarget; if ( symInfo.isBind(sectionContent, bindTarget) ) { printf(" class: %s\n", bindTarget->symbolName.c_str()); printf(" flags: 0x%08X\n", *((uint32_t*)(&curContent[cfStringSize/4]))); uint64_t stringVmAddr; if ( symInfo.isRebase(&curContent[cfStringSize/2], stringVmAddr) ) { if ( const char* str = symInfo.cStringAt(stringVmAddr) ) { printf(" string: "); printQuotedString(str); printf("\n"); } } printf(" length: %u\n", *((uint32_t*)(&curContent[3*cfStringSize/4]))); } curContent += cfStringSize; curAddr += cfStringSize; } } static void dumpGOT(const SymbolicatedImage& symInfo, const Header::SectionInfo& sectInfo) { const uint8_t* sectionContent = symInfo.content(sectInfo); const uint8_t* sectionContentEnd = sectionContent + sectInfo.size; const uint8_t* curContent = sectionContent; const uint8_t ptrSize = symInfo.ptrSize(); uint64_t curAddr = sectInfo.address; while ( curContent < sectionContentEnd ) { const Fixup::BindTarget* bindTarget; uint64_t rebaseTargetVmAddr; printf("0x%08llX ", curAddr); if ( symInfo.isBind(curContent, bindTarget) ) { printf("%s\n", bindTarget->symbolName.c_str()); } else if ( symInfo.isRebase(curContent, rebaseTargetVmAddr) ) { const char* targetName = symInfo.symbolNameAt(rebaseTargetVmAddr); if ( targetName != nullptr ) printf("%s\n", targetName); else printf("0x%08llX\n", rebaseTargetVmAddr); } else { if ( ptrSize == 8 ) { printf("0x%08llX\n", *(uint64_t*)curContent); } else { printf("0x%04X\n", *(uint32_t*)curContent); } } curContent += ptrSize; curAddr += ptrSize; } } static void dumpClassPointers(const SymbolicatedImage& symInfo, const Header::SectionInfo& sectInfo) { const uint8_t* sectionContent = symInfo.content(sectInfo); const uint8_t* sectionContentEnd = sectionContent + sectInfo.size; const uint8_t* curContent = sectionContent; uint64_t curAddr = sectInfo.address; while ( curContent < sectionContentEnd ) { uint64_t rebaseTargetVmAddr; if ( symInfo.isRebase(curContent, rebaseTargetVmAddr) ) { printf("0x%08llX: 0x%08llX ", curAddr, rebaseTargetVmAddr); if ( const char* targetName = symInfo.symbolNameAt(rebaseTargetVmAddr) ) printf("%s", targetName); printf("\n"); } curContent += symInfo.ptrSize(); curAddr += symInfo.ptrSize(); } } static void dumpStringPointers(const SymbolicatedImage& symInfo, const Header::SectionInfo& sectInfo) { const uint8_t* sectionContent = symInfo.content(sectInfo); const uint8_t* sectionContentEnd = sectionContent + sectInfo.size; const uint8_t* curContent = sectionContent; uint64_t curAddr = sectInfo.address; while ( curContent < sectionContentEnd ) { uint64_t rebaseTargetVmAddr; printf("0x%08llX ", curAddr); if ( symInfo.isRebase(curContent, rebaseTargetVmAddr) ) { if ( const char* selector = symInfo.cStringAt(rebaseTargetVmAddr) ) printQuotedString(selector); } printf("\n"); curContent += symInfo.ptrSize(); curAddr += symInfo.ptrSize(); } } struct NameAndFlagBitNum { CString name; uint32_t flagBitNum; }; #define FUNCTION_VARIANT_SYSTEM_WIDE(_flagBitNum, _name, _flagBitsInitialization) \ { _name, _flagBitNum }, static const NameAndFlagBitNum sSystemWideFVNamesAndFlagBitNums[] = { #include "FunctionVariantsSystemWide.inc" }; #define FUNCTION_VARIANT_PER_PROCESS(_flagBitNum, _name, _flagBitsInitialization) \ { _name, _flagBitNum }, static const NameAndFlagBitNum sPerProcessFVNamesAndFlagBitNums[] = { #include "FunctionVariantsPerProcess.inc" }; #define FUNCTION_VARIANT_ARM64(_flagBitNum, _name, _flagBitsInitialization) \ { _name, _flagBitNum }, static const NameAndFlagBitNum sArm64FVNamesAndFlagBitNums[] = { #include "FunctionVariantsArm64.inc" }; #define FUNCTION_VARIANT_X86_64(_flagBitNum, _name, _flagBitsInitialization) \ { _name, _flagBitNum }, static const NameAndFlagBitNum sIntelFVNamesAndFlagBitNums[] = { #include "FunctionVariantsX86_64.inc" }; static CString findName(std::span<const NameAndFlagBitNum> nameAndKeys, uint8_t flagBitNum) { for (const NameAndFlagBitNum& entry : nameAndKeys) { if ( entry.flagBitNum == flagBitNum ) return entry.name; } return "???"; } static void dumpFunctionVariantTables(const SymbolicatedImage& symInfo, const FunctionVariants& allTables) { printf(" -function_variants:\n"); for (uint32_t i=0; i < allTables.count(); ++i) { printf(" table #%u\n", i); const FunctionVariantsRuntimeTable* table = allTables.entry(i); std::span<const NameAndFlagBitNum> nameTable; switch ( table->kind ) { case FunctionVariantsRuntimeTable::Kind::perProcess: printf(" namespace: per-process\n"); nameTable = std::span<const NameAndFlagBitNum>(sPerProcessFVNamesAndFlagBitNums, sizeof(sPerProcessFVNamesAndFlagBitNums)/sizeof(NameAndFlagBitNum)); break; case FunctionVariantsRuntimeTable::Kind::systemWide: printf(" namespace: system-wide\n"); nameTable = std::span<const NameAndFlagBitNum>(sSystemWideFVNamesAndFlagBitNums, sizeof(sSystemWideFVNamesAndFlagBitNums)/sizeof(NameAndFlagBitNum)); break; case FunctionVariantsRuntimeTable::Kind::arm64: printf(" namespace: arm64\n"); nameTable = std::span<const NameAndFlagBitNum>(sArm64FVNamesAndFlagBitNums, sizeof(sArm64FVNamesAndFlagBitNums)/sizeof(NameAndFlagBitNum)); break; case FunctionVariantsRuntimeTable::Kind::x86_64: printf(" namespace: x86_64\n"); nameTable = std::span<const NameAndFlagBitNum>(sIntelFVNamesAndFlagBitNums, sizeof(sIntelFVNamesAndFlagBitNums)/sizeof(NameAndFlagBitNum)); break; default: printf(" namespace: unknown (%d)\n", table->kind); return; } __block size_t longestNameLength = 0; table->forEachVariant(^(FunctionVariantsRuntimeTable::Kind kind, uint32_t implOffset, bool implIsTable, std::span<const uint8_t> flagBitNums, bool& stop) { const char* name = symInfo.symbolNameAt(symInfo.prefLoadAddress() + implOffset); if ( name == NULL ) name = "???"; size_t len = strlen(name); if ( len > longestNameLength ) longestNameLength = len; }); table->forEachVariant(^(FunctionVariantsRuntimeTable::Kind kind, uint32_t implOffset, bool implIsTable, std::span<const uint8_t> flagBitNums, bool& stop) { if ( implIsTable ) { printf(" table: #%d", implOffset); printf("%*s", (int)(longestNameLength+14), "-->"); } else { const char* name = symInfo.symbolNameAt(symInfo.prefLoadAddress() + implOffset); if ( name == NULL ) name = "???"; printf(" function: 0x%08X %s ", implOffset, name); printf("%*s", (int)(longestNameLength-strlen(name)+4), "-->"); } if ( flagBitNums.size() == 0 ) { printf(" 0x00 (\"default\")\n"); } else if ( flagBitNums.size() == 1 ) { printf(" 0x%02X (\"%s\")\n", flagBitNums[0], findName(nameTable, flagBitNums[0]).c_str()); } else { printf(" "); for (uint8_t flag : flagBitNums) printf("0x%02X ", flag); printf("("); for (uint8_t flag : flagBitNums) printf("\"%s\" ", findName(nameTable, flag).c_str()); printf(")\n"); } }); } } static void printFunctionVariants(const Image& image) { if ( image.hasFunctionVariants() ) { SymbolicatedImage symImage(image); dumpFunctionVariantTables(symImage, image.functionVariants()); } } static void printDisassembly(const Image& image) { __block SymbolicatedImage symImage(image); __block size_t sectNum = 1; image.header()->forEachSection(^(const Header::SectionInfo& sectInfo, bool& stop) { if ( sectInfo.flags & (S_ATTR_PURE_INSTRUCTIONS|S_ATTR_SOME_INSTRUCTIONS) ) { printf("(%.*s,%.*s) section:\n", (int)sectInfo.segmentName.size(), sectInfo.segmentName.data(), (int)sectInfo.sectionName.size(), sectInfo.sectionName.data()); disassembleSection(symImage, sectInfo, sectNum); } ++sectNum; }); } static void usage() { fprintf(stderr, "Usage: dyld_info <options>* <mach-o file>+ | -all_dir <dir> | -all_dyld_cache\n" "\t-arch limit to specified architecture(s) (defaults to all architectures)\n" "\t-platform print platform (default if no options specified)\n" "\t-segments print segments (default if no options specified)\n" "\t-linked_dylibs print all dylibs this image links against (default if no options specified)\n" "\t-inits print initializers\n" "\t-fixups print locations dyld will rebase/bind\n" "\t-exports print all exported symbols\n" "\t-imports print all symbols needed from other dylibs\n" "\t-objc print objc classes, categories, etc\n" "\t-fixup_chains print info about chain format and starts\n" "\t-fixup_chain_details print detailed info about every fixup in chain\n" "\t-fixup_chain_header print detailed info about the fixup chains header\n" "\t-symbolic_fixups print ranges of each atom of DATA with symbol name and fixups\n" //"\t-swift_protocols print swift protocols\n" "\t-shared_region print shared cache (split seg) info\n" "\t-function_starts print function starts information\n" "\t-opcodes print opcodes information\n" "\t-load_commands print load commands\n" "\t-uuid print UUID of binary\n" "\t-function_variants print info on function variants in binary\n" "\t-disassemble print all code sections using disassembler\n" "\t-section <seg> <sect> print content of section, formatted by section type\n" "\t-all_sections print content of all sections, formatted by section type\n" "\t-section_bytes <seg> <sect> print content of section, as raw hex bytes\n" "\t-all_sections_bytes print content of all sections, formatted as raw hex bytes\n" "\t-validate_only only prints an malformedness about file(s)\n" "\t-no_validate don't check for malformedness about file(s)\n" "\t-all_dir starting is specified directory, recurse to find all mach-o files\n" "\t-all_dyld_cache show specified info about all dylibs in the dyld cache\n" ); } struct SegSect { std::string_view segmentName; std::string_view sectionName; }; typedef std::vector<SegSect> SegSectVector; static bool hasSegSect(const SegSectVector& vec, const Header::SectionInfo& sectInfo) { for (const SegSect& ss : vec) { if ( (ss.segmentName == sectInfo.segmentName) && (ss.sectionName == sectInfo.sectionName) ) return true; } return false; } struct PrintOptions { bool platform = false; bool segments = false; bool linkedDylibs = false; bool initializers = false; bool exports = false; bool imports = false; bool fixups = false; bool fixupChains = false; bool fixupChainDetails = false; bool fixupChainHeader = false; bool symbolicFixups = false; bool objc = false; bool swiftProtocols = false; bool sharedRegion = false; bool functionStarts = false; bool opcodes = false; bool unwind = false; bool uuid = false; bool loadCommands = false; bool functionVariants = false; bool disassemble = false; bool allSections = false; bool allSectionsHex = false; bool validateOnly = false; bool validate = true; SegSectVector sections; SegSectVector sectionsHex; }; int main(int argc, const char* argv[]) { if ( argc == 1 ) { usage(); return 0; } bool someOptionSpecified = false; const char* dyldCachePath = nullptr; bool allDyldCache = false; PrintOptions printOptions; __block std::vector<const char*> files; std::vector<const char*> cmdLineArchs; for (int i=1; i < argc; ++i) { const char* arg = argv[i]; if ( strcmp(arg, "-platform") == 0 ) { printOptions.platform = true; someOptionSpecified = true; } else if ( strcmp(arg, "-segments") == 0 ) { printOptions.segments = true; someOptionSpecified = true; } else if ( (strcmp(arg, "-linked_dylibs") == 0) || (strcmp(arg, "-dependents") == 0) ) { printOptions.linkedDylibs = true; someOptionSpecified = true; } else if ( strcmp(arg, "-inits") == 0 ) { printOptions.initializers = true; someOptionSpecified = true; } else if ( strcmp(arg, "-fixups") == 0 ) { printOptions.fixups = true; someOptionSpecified = true; } else if ( strcmp(arg, "-fixup_chains") == 0 ) { printOptions.fixupChains = true; someOptionSpecified = true; } else if ( strcmp(arg, "-fixup_chain_details") == 0 ) { printOptions.fixupChainDetails = true; someOptionSpecified = true; } else if ( strcmp(arg, "-fixup_chain_header") == 0 ) { printOptions.fixupChainHeader = true; someOptionSpecified = true; } else if ( strcmp(arg, "-symbolic_fixups") == 0 ) { printOptions.symbolicFixups = true; someOptionSpecified = true; } else if ( strcmp(arg, "-exports") == 0 ) { printOptions.exports = true; someOptionSpecified = true; } else if ( strcmp(arg, "-imports") == 0 ) { printOptions.imports = true; someOptionSpecified = true; } else if ( strcmp(arg, "-objc") == 0 ) { printOptions.objc = true; someOptionSpecified = true; } else if ( strcmp(arg, "-swift_protocols") == 0 ) { printOptions.swiftProtocols = true; someOptionSpecified = true; } else if ( strcmp(arg, "-shared_region") == 0 ) { printOptions.sharedRegion = true; someOptionSpecified = true; } else if ( strcmp(arg, "-function_starts") == 0 ) { printOptions.functionStarts = true; someOptionSpecified = true; } else if ( strcmp(arg, "-opcodes") == 0 ) { printOptions.opcodes = true; } else if ( strcmp(arg, "-unwind") == 0 ) { printOptions.unwind = true; } else if ( strcmp(arg, "-uuid") == 0 ) { printOptions.uuid = true; someOptionSpecified = true; } else if ( strcmp(arg, "-load_commands") == 0 ) { printOptions.loadCommands = true; someOptionSpecified = true; } else if ( strcmp(arg, "-disassemble") == 0 ) { printOptions.disassemble = true; someOptionSpecified = true; } else if ( strcmp(arg, "-section") == 0 ) { const char* segName = argv[++i]; const char* sectName = argv[++i]; if ( !segName || !sectName ) { fprintf(stderr, "-section requires segment-name and section-name"); return 1; } printOptions.sections.push_back({segName, sectName}); someOptionSpecified = true; } else if ( strcmp(arg, "-all_sections") == 0 ) { printOptions.allSections = true; } else if ( strcmp(arg, "-section_bytes") == 0 ) { const char* segName = argv[++i]; const char* sectName = argv[++i]; if ( !segName || !sectName ) { fprintf(stderr, "-section_bytes requires segment-name and section-name"); return 1; } printOptions.sectionsHex.push_back({segName, sectName}); someOptionSpecified = true; } else if ( strcmp(arg, "-all_sections_bytes") == 0 ) { printOptions.allSectionsHex = true; someOptionSpecified = true; } else if ( strcmp(arg, "-function_variants") == 0 ) { printOptions.functionVariants = true; someOptionSpecified = true; } else if ( strcmp(arg, "-validate_only") == 0 ) { printOptions.validateOnly = true; someOptionSpecified = true; } else if ( strcmp(arg, "-no_validate") == 0 ) { printOptions.validate = false; } else if ( strcmp(arg, "-arch") == 0 ) { if ( ++i < argc ) { cmdLineArchs.push_back(argv[i]); } else { fprintf(stderr, "-arch missing architecture name"); return 1; } } else if ( strcmp(arg, "-all_dir") == 0 ) { if ( ++i < argc ) { const char* searchDir = argv[i]; iterateDirectoryTree("", searchDir, ^(const std::string& dirPath) { return false; }, ^(const std::string& path, const struct stat& statBuf) { if ( statBuf.st_size > 4096 ) files.push_back(strdup(path.c_str())); }, true /* process files */, true /* recurse */); } else { fprintf(stderr, "-all_dir directory"); return 1; } } else if ( strcmp(arg, "-dyld_cache_path") == 0 ) { if ( ++i < argc ) { dyldCachePath = argv[i]; } else { fprintf(stderr, "-dyld_cache_path path"); return 1; } } else if ( strcmp(arg, "-all_dyld_cache") == 0 ) { allDyldCache = true; } else if ( arg[0] == '-' ) { fprintf(stderr, "dyld_info: unknown option: %s\n", arg); return 1; } else { files.push_back(arg); } } const DyldSharedCache* dyldCache = nullptr; if ( dyldCachePath ) { std::vector<const DyldSharedCache*> dyldCaches = DyldSharedCache::mapCacheFiles(dyldCachePath); if ( dyldCaches.empty() ) { fprintf(stderr, "dyld_info: can't map shared cache at %s\n", dyldCachePath); return 1; } dyldCache = dyldCaches.front(); } else { size_t cacheLen; dyldCache = (DyldSharedCache*)_dyld_get_shared_cache_range(&cacheLen); } if ( allDyldCache ) { if ( dyldCache ) { dyldCache->forEachImage(^(const Header* hdr, const char* installName) { files.push_back(installName); }); } else { fprintf(stderr, "dyld_info: -all_dyld_cache specified but shared cache isn't loaded"); return 1; } } // check some files specified if ( files.size() == 0 ) { usage(); return 0; } // if no options specified, use default set if ( !someOptionSpecified ) { printOptions.platform = true; printOptions.uuid = true; printOptions.segments = true; printOptions.linkedDylibs = true; } __block bool sliceFound = false; other_tools::forSelectedSliceInPaths(files, cmdLineArchs, dyldCache, ^(const char* path, const Header* header, size_t sliceLen) { if ( header == nullptr ) return; // non-mach-o file found sliceFound = true; printf("%s [%s]:\n", path, header->archName()); if ( header->isObjectFile() ) return; Image image((void*)header, sliceLen, (header->inDyldCache() ? Image::MappingKind::dyldLoadedPostFixups : Image::MappingKind::wholeSliceMapped)); if ( printOptions.validate ) { if ( Error err = image.validate() ) { printf(" %s\n", err.message()); return; } } if ( !printOptions.validateOnly ) { if ( printOptions.platform ) printPlatforms(image.header()); if ( printOptions.uuid ) printUUID(image.header()); if ( printOptions.segments ) printSegments(image.header()); if ( printOptions.linkedDylibs ) printLinkedDylibs(image.header()); if ( printOptions.initializers ) printInitializers(image); if ( printOptions.exports ) printExports(image); if ( printOptions.imports ) printImports(image); if ( printOptions.fixups ) printFixups(image); if ( printOptions.fixupChains ) printChainInfo(image); if ( printOptions.fixupChainDetails ) printChainDetails(image); if ( printOptions.fixupChainHeader ) printChainHeader(image); if ( printOptions.symbolicFixups ) printSymbolicFixups(image); if ( printOptions.opcodes ) printOpcodes(image); if ( printOptions.functionStarts ) printFunctionStarts(image); if ( printOptions.unwind ) printUnwindTable(image); if ( printOptions.objc ) printObjC(image); // FIXME: implement or remove //if ( printOptions.swiftProtocols ) // printSwiftProtocolConformances(ma, dyldCache, cacheLen); if ( printOptions.loadCommands ) printLoadCommands(image); if ( printOptions.sharedRegion ) printSharedRegion(image); if ( printOptions.functionVariants ) printFunctionVariants(image); if ( printOptions.disassemble ) printDisassembly(image); if ( printOptions.allSections || !printOptions.sections.empty() ) { __block SymbolicatedImage symImage(image); __block size_t sectNum = 1; image.header()->forEachSection(^(const Header::SectionInfo& sectInfo, bool& stop) { if ( printOptions.allSections || hasSegSect(printOptions.sections, sectInfo) ) { printf("(%.*s,%.*s) section:\n", (int)sectInfo.segmentName.size(), sectInfo.segmentName.data(), (int)sectInfo.sectionName.size(), sectInfo.sectionName.data()); if ( sectInfo.flags & (S_ATTR_PURE_INSTRUCTIONS|S_ATTR_SOME_INSTRUCTIONS) ) { disassembleSection(symImage, sectInfo, sectNum); } else if ( (sectInfo.flags & SECTION_TYPE) == S_CSTRING_LITERALS ) { dumpCStrings(symImage, sectInfo); } else if ( (sectInfo.flags & SECTION_TYPE) == S_NON_LAZY_SYMBOL_POINTERS ) { dumpGOT(image, sectInfo); } else if ( (sectInfo.sectionName == "__cfstring") && sectInfo.segmentName.starts_with("__DATA") ) { dumpCFStrings(symImage, sectInfo); } else if ( (sectInfo.sectionName == "__objc_classrefs") && sectInfo.segmentName.starts_with("__DATA") ) { dumpGOT(symImage, sectInfo); } else if ( (sectInfo.sectionName == "__objc_classlist") && sectInfo.segmentName.starts_with("__DATA") ) { dumpClassPointers(symImage, sectInfo); } else if ( (sectInfo.sectionName == "__objc_catlist") && sectInfo.segmentName.starts_with("__DATA") ) { dumpClassPointers(symImage, sectInfo); } else if ( (sectInfo.sectionName == "__objc_selrefs") && sectInfo.segmentName.starts_with("__DATA") ) { dumpStringPointers(symImage, sectInfo); } else if ( (sectInfo.sectionName == "__info_plist") && sectInfo.segmentName.starts_with("__TEXT") ) { dumpCStrings(image, sectInfo); } // FIXME: other section types else { dumpHex(symImage, sectInfo, sectNum); } } ++sectNum; }); } if ( printOptions.allSectionsHex || !printOptions.sectionsHex.empty() ) { __block SymbolicatedImage symImage(image); __block size_t sectNum = 1; image.header()->forEachSection(^(const Header::SectionInfo& sectInfo, bool& stop) { if ( printOptions.allSectionsHex || hasSegSect(printOptions.sectionsHex, sectInfo) ) { printf("(%.*s,%.*s) section:\n", (int)sectInfo.segmentName.size(), sectInfo.segmentName.data(), (int)sectInfo.sectionName.size(), sectInfo.sectionName.data()); dumpHex(symImage, sectInfo, sectNum); } ++sectNum; }); } } }); if ( !sliceFound && (files.size() == 1) ) { if ( cmdLineArchs.empty() ) { fprintf(stderr, "dyld_info: '%s' file not found\n", files[0]); // FIXME: projects compatibility (rdar://121555064) if ( printOptions.linkedDylibs ) return 0; } else fprintf(stderr, "dyld_info: '%s' does not contain specified arch(s)\n", files[0]); return 1; } return 0; } |