--- /dev/null
+//===- ReadArchive.cpp - Code to read LLVM bytecode from .a files ---------===//
+//
+// This file implements the ReadArchiveFile interface, which allows a linker to
+// read all of the LLVM bytecode files contained in a .a file. This file
+// understands the standard system .a file format. This can only handle the .a
+// variant prevelant on linux systems so far, but may be extended. See
+// information in this source file for more information:
+// http://sources.redhat.com/cgi-bin/cvsweb.cgi/src/bfd/archive.c?cvsroot=src
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Bytecode/Reader.h"
+#include "llvm/Module.h"
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <fcntl.h>
+
+namespace {
+ struct ar_hdr {
+ char name[16];
+ char date[12];
+ char uid[6];
+ char gid[6];
+ char mode[8];
+ char size[10];
+ char fmag[2]; // Always equal to '`\n'
+ };
+
+ enum ObjectType {
+ UserObject, // A user .o/.bc file
+ Unknown, // Unknown file, just ignore it
+ SVR4LongFilename, // a "//" section used for long file names
+ };
+}
+
+
+// getObjectType - Determine the type of object that this header represents.
+// This is capable of parsing the variety of special sections used for various
+// purposes.
+static enum ObjectType getObjectType(ar_hdr *H, unsigned Size) {
+ // Check for sections with special names...
+ if (!memcmp(H->name, "// ", 16))
+ return SVR4LongFilename;
+
+ // Check to see if it looks like an llvm object file...
+ if (Size >= 4 && !memcmp(H+1, "llvm", 4))
+ return UserObject;
+
+ return Unknown;
+}
+
+
+static inline bool Error(std::string *ErrorStr, const char *Message) {
+ if (ErrorStr) *ErrorStr = Message;
+ return true;
+}
+
+static bool ParseLongFilenameSection(unsigned char *Buffer, unsigned Size,
+ std::vector<std::string> &LongFilenames,
+ std::string *S) {
+ if (!LongFilenames.empty())
+ return Error(S, "archive file contains multiple long filename entries");
+
+ while (Size) {
+ // Long filename entries are newline delimited to keep the archive readable.
+ unsigned char *Ptr = (unsigned char*)memchr(Buffer, '\n', Size);
+ if (Ptr == 0)
+ return Error(S, "archive long filename entry doesn't end with newline!");
+ assert(*Ptr == '\n');
+
+ if (Ptr == Buffer) break; // Last entry contains just a newline.
+
+ unsigned char *End = Ptr;
+ if (End[-1] == '/') --End; // Remove trailing / from name
+
+ LongFilenames.push_back(std::string(Buffer, End));
+ Size -= Ptr-Buffer+1;
+ Buffer = Ptr+1;
+ }
+
+ return false;
+}
+
+
+static bool ReadArchiveBuffer(unsigned char *Buffer, unsigned Length,
+ std::vector<Module*> &Objects,
+ std::string *ErrorStr) {
+ if (Length < 8 || memcmp(Buffer, "!<arch>\n", 8))
+ return Error(ErrorStr, "signature incorrect for an archive file!");
+ Buffer += 8; Length -= 8; // Skip the magic string.
+
+ std::vector<std::string> LongFilenames;
+
+ while (Length >= sizeof(ar_hdr)) {
+ ar_hdr *Hdr = (ar_hdr*)Buffer;
+ unsigned Size = atoi(Hdr->size);
+ if (Size+sizeof(ar_hdr) > Length)
+ return Error(ErrorStr, "invalid record length in archive file!");
+
+ switch (getObjectType(Hdr, Size)) {
+ case SVR4LongFilename:
+ // If this is a long filename section, read all of the file names into the
+ // LongFilenames vector.
+ //
+ if (ParseLongFilenameSection(Buffer+sizeof(ar_hdr), Size,
+ LongFilenames, ErrorStr))
+ return true;
+ break;
+ case UserObject: {
+ Module *M = ParseBytecodeBuffer(Buffer+sizeof(ar_hdr), Size, ErrorStr);
+ if (!M) return true;
+ Objects.push_back(M);
+ break;
+ }
+ case Unknown:
+ std::cerr << "ReadArchiveBuffer: WARNING: Skipping unknown file: ";
+ std::cerr << std::string(Hdr->name, Hdr->name+sizeof(Hdr->name+1)) <<"\n";
+ break; // Just ignore unknown files.
+ }
+
+ // Round Size up to an even number...
+ Size = (Size+1)/2*2;
+ Buffer += sizeof(ar_hdr)+Size; // Move to the next entry
+ Length -= sizeof(ar_hdr)+Size;
+ }
+
+ return Length != 0;
+}
+
+
+// ReadArchiveFile - Read bytecode files from the specfied .a file, returning
+// true on error, or false on success. This does not support reading files from
+// standard input.
+//
+bool ReadArchiveFile(const std::string &Filename, std::vector<Module*> &Objects,
+ std::string *ErrorStr) {
+ int FD = open(Filename.c_str(), O_RDONLY);
+ if (FD == -1)
+ return Error(ErrorStr, "Error opening file!");
+
+ // Stat the file to get its length...
+ struct stat StatBuf;
+ if (fstat(FD, &StatBuf) == -1 || StatBuf.st_size == 0)
+ return Error(ErrorStr, "Error stat'ing file!");
+
+ // mmap in the file all at once...
+ int Length = StatBuf.st_size;
+ unsigned char *Buffer = (unsigned char*)mmap(0, Length, PROT_READ,
+ MAP_PRIVATE, FD, 0);
+ if (Buffer == (unsigned char*)MAP_FAILED)
+ return Error(ErrorStr, "Error mmapping file!");
+
+ // Parse the archive files we mmap'ped in
+ bool Result = ReadArchiveBuffer(Buffer, Length, Objects, ErrorStr);
+
+ // Unmmap the archive...
+ munmap((char*)Buffer, Length);
+
+ if (Result) // Free any loaded objects
+ while (!Objects.empty()) {
+ delete Objects.back();
+ Objects.pop_back();
+ }
+
+ return Result;
+}
--- /dev/null
+//===- ReadArchive.cpp - Code to read LLVM bytecode from .a files ---------===//
+//
+// This file implements the ReadArchiveFile interface, which allows a linker to
+// read all of the LLVM bytecode files contained in a .a file. This file
+// understands the standard system .a file format. This can only handle the .a
+// variant prevelant on linux systems so far, but may be extended. See
+// information in this source file for more information:
+// http://sources.redhat.com/cgi-bin/cvsweb.cgi/src/bfd/archive.c?cvsroot=src
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Bytecode/Reader.h"
+#include "llvm/Module.h"
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <fcntl.h>
+
+namespace {
+ struct ar_hdr {
+ char name[16];
+ char date[12];
+ char uid[6];
+ char gid[6];
+ char mode[8];
+ char size[10];
+ char fmag[2]; // Always equal to '`\n'
+ };
+
+ enum ObjectType {
+ UserObject, // A user .o/.bc file
+ Unknown, // Unknown file, just ignore it
+ SVR4LongFilename, // a "//" section used for long file names
+ };
+}
+
+
+// getObjectType - Determine the type of object that this header represents.
+// This is capable of parsing the variety of special sections used for various
+// purposes.
+static enum ObjectType getObjectType(ar_hdr *H, unsigned Size) {
+ // Check for sections with special names...
+ if (!memcmp(H->name, "// ", 16))
+ return SVR4LongFilename;
+
+ // Check to see if it looks like an llvm object file...
+ if (Size >= 4 && !memcmp(H+1, "llvm", 4))
+ return UserObject;
+
+ return Unknown;
+}
+
+
+static inline bool Error(std::string *ErrorStr, const char *Message) {
+ if (ErrorStr) *ErrorStr = Message;
+ return true;
+}
+
+static bool ParseLongFilenameSection(unsigned char *Buffer, unsigned Size,
+ std::vector<std::string> &LongFilenames,
+ std::string *S) {
+ if (!LongFilenames.empty())
+ return Error(S, "archive file contains multiple long filename entries");
+
+ while (Size) {
+ // Long filename entries are newline delimited to keep the archive readable.
+ unsigned char *Ptr = (unsigned char*)memchr(Buffer, '\n', Size);
+ if (Ptr == 0)
+ return Error(S, "archive long filename entry doesn't end with newline!");
+ assert(*Ptr == '\n');
+
+ if (Ptr == Buffer) break; // Last entry contains just a newline.
+
+ unsigned char *End = Ptr;
+ if (End[-1] == '/') --End; // Remove trailing / from name
+
+ LongFilenames.push_back(std::string(Buffer, End));
+ Size -= Ptr-Buffer+1;
+ Buffer = Ptr+1;
+ }
+
+ return false;
+}
+
+
+static bool ReadArchiveBuffer(unsigned char *Buffer, unsigned Length,
+ std::vector<Module*> &Objects,
+ std::string *ErrorStr) {
+ if (Length < 8 || memcmp(Buffer, "!<arch>\n", 8))
+ return Error(ErrorStr, "signature incorrect for an archive file!");
+ Buffer += 8; Length -= 8; // Skip the magic string.
+
+ std::vector<std::string> LongFilenames;
+
+ while (Length >= sizeof(ar_hdr)) {
+ ar_hdr *Hdr = (ar_hdr*)Buffer;
+ unsigned Size = atoi(Hdr->size);
+ if (Size+sizeof(ar_hdr) > Length)
+ return Error(ErrorStr, "invalid record length in archive file!");
+
+ switch (getObjectType(Hdr, Size)) {
+ case SVR4LongFilename:
+ // If this is a long filename section, read all of the file names into the
+ // LongFilenames vector.
+ //
+ if (ParseLongFilenameSection(Buffer+sizeof(ar_hdr), Size,
+ LongFilenames, ErrorStr))
+ return true;
+ break;
+ case UserObject: {
+ Module *M = ParseBytecodeBuffer(Buffer+sizeof(ar_hdr), Size, ErrorStr);
+ if (!M) return true;
+ Objects.push_back(M);
+ break;
+ }
+ case Unknown:
+ std::cerr << "ReadArchiveBuffer: WARNING: Skipping unknown file: ";
+ std::cerr << std::string(Hdr->name, Hdr->name+sizeof(Hdr->name+1)) <<"\n";
+ break; // Just ignore unknown files.
+ }
+
+ // Round Size up to an even number...
+ Size = (Size+1)/2*2;
+ Buffer += sizeof(ar_hdr)+Size; // Move to the next entry
+ Length -= sizeof(ar_hdr)+Size;
+ }
+
+ return Length != 0;
+}
+
+
+// ReadArchiveFile - Read bytecode files from the specfied .a file, returning
+// true on error, or false on success. This does not support reading files from
+// standard input.
+//
+bool ReadArchiveFile(const std::string &Filename, std::vector<Module*> &Objects,
+ std::string *ErrorStr) {
+ int FD = open(Filename.c_str(), O_RDONLY);
+ if (FD == -1)
+ return Error(ErrorStr, "Error opening file!");
+
+ // Stat the file to get its length...
+ struct stat StatBuf;
+ if (fstat(FD, &StatBuf) == -1 || StatBuf.st_size == 0)
+ return Error(ErrorStr, "Error stat'ing file!");
+
+ // mmap in the file all at once...
+ int Length = StatBuf.st_size;
+ unsigned char *Buffer = (unsigned char*)mmap(0, Length, PROT_READ,
+ MAP_PRIVATE, FD, 0);
+ if (Buffer == (unsigned char*)MAP_FAILED)
+ return Error(ErrorStr, "Error mmapping file!");
+
+ // Parse the archive files we mmap'ped in
+ bool Result = ReadArchiveBuffer(Buffer, Length, Objects, ErrorStr);
+
+ // Unmmap the archive...
+ munmap((char*)Buffer, Length);
+
+ if (Result) // Free any loaded objects
+ while (!Objects.empty()) {
+ delete Objects.back();
+ Objects.pop_back();
+ }
+
+ return Result;
+}
--- /dev/null
+//===- ReadArchive.cpp - Code to read LLVM bytecode from .a files ---------===//
+//
+// This file implements the ReadArchiveFile interface, which allows a linker to
+// read all of the LLVM bytecode files contained in a .a file. This file
+// understands the standard system .a file format. This can only handle the .a
+// variant prevelant on linux systems so far, but may be extended. See
+// information in this source file for more information:
+// http://sources.redhat.com/cgi-bin/cvsweb.cgi/src/bfd/archive.c?cvsroot=src
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Bytecode/Reader.h"
+#include "llvm/Module.h"
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <fcntl.h>
+
+namespace {
+ struct ar_hdr {
+ char name[16];
+ char date[12];
+ char uid[6];
+ char gid[6];
+ char mode[8];
+ char size[10];
+ char fmag[2]; // Always equal to '`\n'
+ };
+
+ enum ObjectType {
+ UserObject, // A user .o/.bc file
+ Unknown, // Unknown file, just ignore it
+ SVR4LongFilename, // a "//" section used for long file names
+ };
+}
+
+
+// getObjectType - Determine the type of object that this header represents.
+// This is capable of parsing the variety of special sections used for various
+// purposes.
+static enum ObjectType getObjectType(ar_hdr *H, unsigned Size) {
+ // Check for sections with special names...
+ if (!memcmp(H->name, "// ", 16))
+ return SVR4LongFilename;
+
+ // Check to see if it looks like an llvm object file...
+ if (Size >= 4 && !memcmp(H+1, "llvm", 4))
+ return UserObject;
+
+ return Unknown;
+}
+
+
+static inline bool Error(std::string *ErrorStr, const char *Message) {
+ if (ErrorStr) *ErrorStr = Message;
+ return true;
+}
+
+static bool ParseLongFilenameSection(unsigned char *Buffer, unsigned Size,
+ std::vector<std::string> &LongFilenames,
+ std::string *S) {
+ if (!LongFilenames.empty())
+ return Error(S, "archive file contains multiple long filename entries");
+
+ while (Size) {
+ // Long filename entries are newline delimited to keep the archive readable.
+ unsigned char *Ptr = (unsigned char*)memchr(Buffer, '\n', Size);
+ if (Ptr == 0)
+ return Error(S, "archive long filename entry doesn't end with newline!");
+ assert(*Ptr == '\n');
+
+ if (Ptr == Buffer) break; // Last entry contains just a newline.
+
+ unsigned char *End = Ptr;
+ if (End[-1] == '/') --End; // Remove trailing / from name
+
+ LongFilenames.push_back(std::string(Buffer, End));
+ Size -= Ptr-Buffer+1;
+ Buffer = Ptr+1;
+ }
+
+ return false;
+}
+
+
+static bool ReadArchiveBuffer(unsigned char *Buffer, unsigned Length,
+ std::vector<Module*> &Objects,
+ std::string *ErrorStr) {
+ if (Length < 8 || memcmp(Buffer, "!<arch>\n", 8))
+ return Error(ErrorStr, "signature incorrect for an archive file!");
+ Buffer += 8; Length -= 8; // Skip the magic string.
+
+ std::vector<std::string> LongFilenames;
+
+ while (Length >= sizeof(ar_hdr)) {
+ ar_hdr *Hdr = (ar_hdr*)Buffer;
+ unsigned Size = atoi(Hdr->size);
+ if (Size+sizeof(ar_hdr) > Length)
+ return Error(ErrorStr, "invalid record length in archive file!");
+
+ switch (getObjectType(Hdr, Size)) {
+ case SVR4LongFilename:
+ // If this is a long filename section, read all of the file names into the
+ // LongFilenames vector.
+ //
+ if (ParseLongFilenameSection(Buffer+sizeof(ar_hdr), Size,
+ LongFilenames, ErrorStr))
+ return true;
+ break;
+ case UserObject: {
+ Module *M = ParseBytecodeBuffer(Buffer+sizeof(ar_hdr), Size, ErrorStr);
+ if (!M) return true;
+ Objects.push_back(M);
+ break;
+ }
+ case Unknown:
+ std::cerr << "ReadArchiveBuffer: WARNING: Skipping unknown file: ";
+ std::cerr << std::string(Hdr->name, Hdr->name+sizeof(Hdr->name+1)) <<"\n";
+ break; // Just ignore unknown files.
+ }
+
+ // Round Size up to an even number...
+ Size = (Size+1)/2*2;
+ Buffer += sizeof(ar_hdr)+Size; // Move to the next entry
+ Length -= sizeof(ar_hdr)+Size;
+ }
+
+ return Length != 0;
+}
+
+
+// ReadArchiveFile - Read bytecode files from the specfied .a file, returning
+// true on error, or false on success. This does not support reading files from
+// standard input.
+//
+bool ReadArchiveFile(const std::string &Filename, std::vector<Module*> &Objects,
+ std::string *ErrorStr) {
+ int FD = open(Filename.c_str(), O_RDONLY);
+ if (FD == -1)
+ return Error(ErrorStr, "Error opening file!");
+
+ // Stat the file to get its length...
+ struct stat StatBuf;
+ if (fstat(FD, &StatBuf) == -1 || StatBuf.st_size == 0)
+ return Error(ErrorStr, "Error stat'ing file!");
+
+ // mmap in the file all at once...
+ int Length = StatBuf.st_size;
+ unsigned char *Buffer = (unsigned char*)mmap(0, Length, PROT_READ,
+ MAP_PRIVATE, FD, 0);
+ if (Buffer == (unsigned char*)MAP_FAILED)
+ return Error(ErrorStr, "Error mmapping file!");
+
+ // Parse the archive files we mmap'ped in
+ bool Result = ReadArchiveBuffer(Buffer, Length, Objects, ErrorStr);
+
+ // Unmmap the archive...
+ munmap((char*)Buffer, Length);
+
+ if (Result) // Free any loaded objects
+ while (!Objects.empty()) {
+ delete Objects.back();
+ Objects.pop_back();
+ }
+
+ return Result;
+}
projects / llvm / commitdiff