--- /dev/null
+/* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*-
+ *
+ * Copyright (c) 2005-2008 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@
+ */
+
+#ifndef __OBJECT_FILE_ARCHIVE__
+#define __OBJECT_FILE_ARCHIVE__
+
+#include <stdint.h>
+#include <math.h>
+#include <unistd.h>
+#include <sys/param.h>
+#include <mach-o/ranlib.h>
+#include <ar.h>
+
+#include <vector>
+#include <set>
+#include <algorithm>
+#include <ext/hash_map>
+
+#include "MachOFileAbstraction.hpp"
+#include "ObjectFile.h"
+#include "MachOReaderRelocatable.hpp"
+#if LTO_SUPPORT
+ #include "LTOReader.hpp"
+#endif
+
+namespace archive {
+
+typedef const struct ranlib* ConstRanLibPtr;
+
+template <typename A>
+class Reader : public ObjectFile::Reader
+{
+public:
+ static bool validFile(const uint8_t* fileContent, uint64_t fileLength);
+ Reader(const uint8_t fileContent[], uint64_t fileLength,
+ const char* path, time_t modTime,
+ const ObjectFile::ReaderOptions& options, uint32_t ordinalBase);
+ virtual ~Reader() {}
+
+ virtual const char* getPath() { return fPath; }
+ virtual time_t getModificationTime(){ return fModTime; }
+ virtual DebugInfoKind getDebugInfoKind() { return ObjectFile::Reader::kDebugInfoNone; }
+ virtual std::vector<class ObjectFile::Atom*>& getAtoms();
+ virtual std::vector<class ObjectFile::Atom*>* getJustInTimeAtomsFor(const char* name);
+ virtual std::vector<Stab>* getStabs() { return NULL; }
+ virtual void optimize(std::vector<ObjectFile::Atom*>&, std::vector<ObjectFile::Atom*>&,
+ std::vector<const char*>&, uint32_t, ObjectFile::Reader* writer,
+ bool allGlobalsAReDeadStripRoots, int okind,
+ bool verbose, bool saveTemps, const char* outputFilePath,
+ bool pie, bool allowTextRelocs);
+
+private:
+ static bool validMachOFile(const uint8_t* fileContent, uint64_t fileLength);
+ static bool validLTOFile(const uint8_t* fileContent, uint64_t fileLength);
+ static cpu_type_t architecture();
+
+
+ class Entry : ar_hdr
+ {
+ public:
+ const char* getName() const;
+ time_t getModTime() const;
+ const uint8_t* getContent() const;
+ uint32_t getContentSize() const;
+ const Entry* getNext() const;
+ private:
+ bool hasLongName() const;
+ unsigned int getLongNameSpace() const;
+
+ };
+
+ class CStringEquals
+ {
+ public:
+ bool operator()(const char* left, const char* right) const { return (strcmp(left, right) == 0); }
+ };
+ typedef __gnu_cxx::hash_map<const char*, const struct ranlib*, __gnu_cxx::hash<const char*>, CStringEquals> NameToEntryMap;
+
+ typedef typename A::P P;
+ typedef typename A::P::E E;
+
+ const struct ranlib* ranlibHashSearch(const char* name);
+ ObjectFile::Reader* makeObjectReaderForMember(const Entry* member);
+ void dumpTableOfContents();
+ void buildHashTable();
+
+ const char* fPath;
+ time_t fModTime;
+ const ObjectFile::ReaderOptions& fOptions;
+ uint32_t fOrdinalBase;
+ const uint8_t* fFileContent;
+ uint64_t fFileLength;
+ const struct ranlib* fTableOfContents;
+ uint32_t fTableOfContentCount;
+ const char* fStringPool;
+ std::vector<class ObjectFile::Atom*> fAllAtoms;
+ std::vector<class ObjectFile::Reader*> fInstantiatedReaders;
+ std::set<const class Entry*> fInstantiatedEntries;
+ std::set<const class Entry*> fPossibleEntries;
+ NameToEntryMap fHashTable;
+
+ static std::vector<class ObjectFile::Atom*> fgEmptyList;
+};
+
+template <typename A>
+std::vector<class ObjectFile::Atom*> Reader<A>::fgEmptyList;
+
+
+template <typename A>
+bool Reader<A>::Entry::hasLongName() const
+{
+ return ( strncmp(this->ar_name, AR_EFMT1, strlen(AR_EFMT1)) == 0 );
+}
+
+template <typename A>
+unsigned int Reader<A>::Entry::getLongNameSpace() const
+{
+ char* endptr;
+ long result = strtol(&this->ar_name[strlen(AR_EFMT1)], &endptr, 10);
+ return result;
+}
+
+template <typename A>
+const char* Reader<A>::Entry::getName() const
+{
+ if ( this->hasLongName() ) {
+ int len = this->getLongNameSpace();
+ static char longName[256];
+ strncpy(longName, ((char*)this)+sizeof(ar_hdr), len);
+ longName[len] = '\0';
+ return longName;
+ }
+ else {
+ static char shortName[20];
+ strncpy(shortName, this->ar_name, 16);
+ shortName[16] = '\0';
+ char* space = strchr(shortName, ' ');
+ if ( space != NULL )
+ *space = '\0';
+ return shortName;
+ }
+}
+
+template <typename A>
+time_t Reader<A>::Entry::getModTime() const
+{
+ char temp[14];
+ strncpy(temp, this->ar_date, 12);
+ temp[12] = '\0';
+ char* endptr;
+ return (time_t)strtol(temp, &endptr, 10);
+}
+
+
+template <typename A>
+const uint8_t* Reader<A>::Entry::getContent() const
+{
+ if ( this->hasLongName() )
+ return ((uint8_t*)this) + sizeof(ar_hdr) + this->getLongNameSpace();
+ else
+ return ((uint8_t*)this) + sizeof(ar_hdr);
+}
+
+
+template <typename A>
+uint32_t Reader<A>::Entry::getContentSize() const
+{
+ char temp[12];
+ strncpy(temp, this->ar_size, 10);
+ temp[10] = '\0';
+ char* endptr;
+ long size = strtol(temp, &endptr, 10);
+ // long name is included in ar_size
+ if ( this->hasLongName() )
+ size -= this->getLongNameSpace();
+ return size;
+}
+
+
+template <typename A>
+const class Reader<A>::Entry* Reader<A>::Entry::getNext() const
+{
+ const uint8_t* p = this->getContent() + getContentSize();
+ p = (const uint8_t*)(((uintptr_t)p+3) & (-4)); // 4-byte align
+ return (class Reader<A>::Entry*)p;
+}
+
+
+template <> cpu_type_t Reader<ppc>::architecture() { return CPU_TYPE_POWERPC; }
+template <> cpu_type_t Reader<ppc64>::architecture() { return CPU_TYPE_POWERPC64; }
+template <> cpu_type_t Reader<x86>::architecture() { return CPU_TYPE_I386; }
+template <> cpu_type_t Reader<x86_64>::architecture() { return CPU_TYPE_X86_64; }
+template <> cpu_type_t Reader<arm>::architecture() { return CPU_TYPE_ARM; }
+
+
+template <typename A>
+bool Reader<A>::validMachOFile(const uint8_t* fileContent, uint64_t fileLength)
+{
+ return mach_o::relocatable::Reader<A>::validFile(fileContent);
+}
+
+template <typename A>
+bool Reader<A>::validLTOFile(const uint8_t* fileContent, uint64_t fileLength)
+{
+#if LTO_SUPPORT
+ return lto::Reader::validFile(fileContent, fileLength, architecture());
+#else
+ return false;
+#endif
+}
+
+
+
+template <typename A>
+bool Reader<A>::validFile(const uint8_t* fileContent, uint64_t fileLength)
+{
+ // must have valid archive header
+ if ( strncmp((const char*)fileContent, "!<arch>\n", 8) != 0 )
+ return false;
+
+ // peak at first .o file and verify it is correct architecture
+ const Entry* const start = (Entry*)&fileContent[8];
+ const Entry* const end = (Entry*)&fileContent[fileLength];
+ for (const Entry* p=start; p < end; p = p->getNext()) {
+ const char* memberName = p->getName();
+ // skip option table-of-content member
+ if ( (p==start) && ((strcmp(memberName, SYMDEF_SORTED) == 0) || (strcmp(memberName, SYMDEF) == 0)) )
+ continue;
+ // archive is valid if first .o file is valid
+ return (validMachOFile(p->getContent(), p->getContentSize()) || validLTOFile(p->getContent(), p->getContentSize()));
+ }
+ // empty archive
+ return true;
+}
+
+template <typename A>
+Reader<A>::Reader(const uint8_t fileContent[], uint64_t fileLength, const char* path, time_t modTime,
+ const ObjectFile::ReaderOptions& options, uint32_t ordinalBase)
+ : fPath(NULL), fModTime(modTime), fOptions(options), fOrdinalBase(ordinalBase), fFileContent(NULL),
+ fTableOfContents(NULL), fTableOfContentCount(0), fStringPool(NULL)
+{
+ fPath = strdup(path);
+ fFileContent = fileContent;
+ fFileLength = fileLength;
+
+ if ( strncmp((const char*)fileContent, "!<arch>\n", 8) != 0 )
+ throw "not an archive";
+
+ // write out path for -whatsloaded option
+ if ( options.fLogAllFiles )
+ printf("%s\n", path);
+
+ if ( !options.fFullyLoadArchives ) {
+ const Entry* const firstMember = (Entry*)&fFileContent[8];
+ if ( (strcmp(firstMember->getName(), SYMDEF_SORTED) == 0) || (strcmp(firstMember->getName(), SYMDEF) == 0) ) {
+ const uint8_t* contents = firstMember->getContent();
+ uint32_t ranlibArrayLen = E::get32(*((uint32_t*)contents));
+ fTableOfContents = (const struct ranlib*)&contents[4];
+ fTableOfContentCount = ranlibArrayLen / sizeof(struct ranlib);
+ fStringPool = (const char*)&contents[ranlibArrayLen+8];
+ if ( ((uint8_t*)(&fTableOfContents[fTableOfContentCount]) > &fileContent[fileLength])
+ || ((uint8_t*)fStringPool > &fileContent[fileLength]) )
+ throw "malformed archive, perhaps wrong architecture";
+ this->buildHashTable();
+ }
+ else
+ throw "archive has no table of contents";
+ }
+}
+
+
+template <typename A>
+ObjectFile::Reader* Reader<A>::makeObjectReaderForMember(const Entry* member)
+{
+ const char* memberName = member->getName();
+ char memberPath[strlen(fPath) + strlen(memberName)+4];
+ strcpy(memberPath, fPath);
+ strcat(memberPath, "(");
+ strcat(memberPath, memberName);
+ strcat(memberPath, ")");
+ //fprintf(stderr, "using %s from %s\n", memberName, fPath);
+ try {
+ // offset the ordinals in this mach-o .o file, so that atoms layout in same order as in archive
+ uint32_t ordinalBase = fOrdinalBase + (uint8_t*)member - fFileContent;
+ if ( validMachOFile(member->getContent(), member->getContentSize()) ) {
+ return new typename mach_o::relocatable::Reader<A>::Reader(member->getContent(), memberPath, member->getModTime(), fOptions, ordinalBase);
+ }
+#if LTO_SUPPORT
+ else if ( validLTOFile(member->getContent(), member->getContentSize()) ) {
+ return new typename lto::Reader(member->getContent(), member->getContentSize(), memberPath, member->getModTime(), fOptions, architecture());
+ }
+#endif
+ throw "not a valid archive member";
+ }
+ catch (const char* msg) {
+ throwf("in %s, %s", memberPath, msg);
+ }
+}
+
+
+template <typename A>
+std::vector<class ObjectFile::Atom*>& Reader<A>::getAtoms()
+{
+ if ( fOptions.fFullyLoadArchives ) {
+ // build vector of all atoms from all .o files in this archive
+ const Entry* const start = (Entry*)&fFileContent[8];
+ const Entry* const end = (Entry*)&fFileContent[fFileLength];
+ for (const Entry* p=start; p < end; p = p->getNext()) {
+ const char* memberName = p->getName();
+ if ( (p==start) && ((strcmp(memberName, SYMDEF_SORTED) == 0) || (strcmp(memberName, SYMDEF) == 0)) )
+ continue;
+ if ( fOptions.fWhyLoad )
+ printf("-all_load forced load of %s(%s)\n", this->getPath(), memberName);
+ ObjectFile::Reader* r = this->makeObjectReaderForMember(p);
+ std::vector<class ObjectFile::Atom*>& atoms = r->getAtoms();
+ fAllAtoms.insert(fAllAtoms.end(), atoms.begin(), atoms.end());
+ fInstantiatedReaders.push_back(r);
+ }
+ return fAllAtoms;
+ }
+ else if ( fOptions.fLoadAllObjcObjectsFromArchives ) {
+ // build vector of all atoms from all .o files containing objc classes in this archive
+ for(class NameToEntryMap::iterator it = fHashTable.begin(); it != fHashTable.end(); ++it) {
+ if ( (strncmp(it->first, ".objc_c", 7) == 0) || (strncmp(it->first, "_OBJC_CLASS_$_", 14) == 0) ) {
+ const Entry* member = (Entry*)&fFileContent[E::get32(it->second->ran_off)];
+ if ( fInstantiatedEntries.count(member) == 0 ) {
+ if ( fOptions.fWhyLoad )
+ printf("-ObjC forced load of %s(%s)\n", this->getPath(), member->getName());
+ // only return these atoms once
+ fInstantiatedEntries.insert(member);
+ ObjectFile::Reader* r = makeObjectReaderForMember(member);
+ std::vector<class ObjectFile::Atom*>& atoms = r->getAtoms();
+ fAllAtoms.insert(fAllAtoms.end(), atoms.begin(), atoms.end());
+ fInstantiatedReaders.push_back(r);
+ }
+ }
+ }
+ return fAllAtoms;
+ }
+ else {
+ // return nonthing for now, getJustInTimeAtomsFor() will return atoms as needed
+ return fgEmptyList;
+ }
+}
+
+template <typename A>
+void Reader<A>::optimize(std::vector<ObjectFile::Atom*>& allAtoms, std::vector<ObjectFile::Atom*>& newAtoms,
+ std::vector<const char*>& additionalUndefines, uint32_t nextOrdinal, ObjectFile::Reader* writer,
+ bool allGlobalsAReDeadStripRoots, int okind,
+ bool verbose, bool saveTemps, const char* outputFilePath,
+ bool pie, bool allowTextRelocs)
+{
+ for(std::vector<ObjectFile::Reader*>::iterator it=fInstantiatedReaders.begin(); it != fInstantiatedReaders.end(); ++it) {
+ (*it)->optimize(allAtoms, newAtoms, additionalUndefines, nextOrdinal, writer, allGlobalsAReDeadStripRoots,
+ okind, verbose, saveTemps, outputFilePath, pie, allowTextRelocs);
+ }
+}
+
+
+
+template <typename A>
+ConstRanLibPtr Reader<A>::ranlibHashSearch(const char* name)
+{
+ class NameToEntryMap::iterator pos = fHashTable.find(name);
+ if ( pos != fHashTable.end() )
+ return pos->second;
+ else
+ return NULL;
+}
+
+template <typename A>
+void Reader<A>::buildHashTable()
+{
+ // walk through list backwards, adding/overwriting entries
+ // this assures that with duplicates those earliest in the list will be found
+ for (int i = fTableOfContentCount-1; i >= 0; --i) {
+ const struct ranlib* entry = &fTableOfContents[i];
+ const char* entryName = &fStringPool[E::get32(entry->ran_un.ran_strx)];
+ const Entry* member = (Entry*)&fFileContent[E::get32(entry->ran_off)];
+ //fprintf(stderr, "adding hash %d, %s -> %p\n", i, entryName, entry);
+ fHashTable[entryName] = entry;
+ fPossibleEntries.insert(member);
+ }
+}
+
+template <typename A>
+void Reader<A>::dumpTableOfContents()
+{
+ for (unsigned int i=0; i < fTableOfContentCount; ++i) {
+ const struct ranlib* e = &fTableOfContents[i];
+ printf("%s in %s\n", &fStringPool[E::get32(e->ran_un.ran_strx)], ((Entry*)&fFileContent[E::get32(e->ran_off)])->getName());
+ }
+}
+
+template <typename A>
+std::vector<class ObjectFile::Atom*>* Reader<A>::getJustInTimeAtomsFor(const char* name)
+{
+ if ( fOptions.fFullyLoadArchives ) {
+ return NULL;
+ }
+ else {
+ const struct ranlib* result = NULL;
+ // do a hash search of table of contents looking for requested symbol
+ result = ranlibHashSearch(name);
+ if ( result != NULL ) {
+ const Entry* member = (Entry*)&fFileContent[E::get32(result->ran_off)];
+ if ( fInstantiatedEntries.count(member) == 0 ) {
+ if ( fOptions.fWhyLoad )
+ printf("%s forced load of %s(%s)\n", name, this->getPath(), member->getName());
+ // only return these atoms once
+ fInstantiatedEntries.insert(member);
+ ObjectFile::Reader* r = makeObjectReaderForMember(member);
+ fInstantiatedReaders.push_back(r);
+ return new std::vector<class ObjectFile::Atom*>(r->getAtoms());
+ }
+ }
+ //fprintf(stderr, "%s NOT found in archive %s\n", name, fPath);
+ return NULL;
+ }
+}
+
+
+
+
+
+}; // namespace archive
+
+
+#endif // __OBJECT_FILE_ARCHIVE__
projects / apple / ld64.git / blobdiff