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Teach sys::Path how to recognize different kinds of object files for ELF

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and Mach-O systems. Additionally, correct the Mach-O logic code to look at
byte 12 not byte 15. Hopefully this fixes the llvm-ld warning on Darwin.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35876 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer 2007-04-11 02:02:09 +00:00
parent f4b1818728
commit 947aa7de67
2 changed files with 43 additions and 14 deletions
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25
include/llvm/System/Path.h
View File

@ -597,13 +597,24 @@ namespace sys {
/// This enumeration delineates the kinds of files that LLVM knows about.
enum LLVMFileType {
Unknown_FileType = 0, ///< Unrecognized file
Bytecode_FileType = 1, ///< Uncompressed bytecode file
CompressedBytecode_FileType = 2, ///< Compressed bytecode file
Archive_FileType = 3, ///< ar style archive file
ELF_FileType = 4, ///< Native ELF object file or lib
Mach_O_FileType = 5, ///< Native Mach-O object file or lib
COFF_FileType = 6 ///< COFF object file or lib
Unknown_FileType = 0, ///< Unrecognized file
Bytecode_FileType, ///< Uncompressed bytecode file
CompressedBytecode_FileType, ///< Compressed bytecode file
Archive_FileType, ///< ar style archive file
ELF_Relocatable_FileType, ///< ELF Relocatable object file
ELF_Executable_FileType, ///< ELF Executable image
ELF_SharedObject_FileType, ///< ELF dynamically linked shared lib
ELF_Core_FileType, ///< ELF core image
Mach_O_Object_FileType, ///< Mach-O Object file
Mach_O_Executable_FileType, ///< Mach-O Executable
Mach_O_FixedVirtualMemorySharedLib_FileType, ///< Mach-O Shared Lib, FVM
Mach_O_Core_FileType, ///< Mach-O Core File
Mach_O_PreloadExectuable_FileType, ///< Mach-O Preloaded Executable
Mach_O_DynamicallyLinkedSharedLib_FileType, ///< Mach-O dynlinked shared lib
Mach_O_DynamicLinker_FileType, ///< The Mach-O dynamic linker
Mach_O_Bundle_FileType, ///< Mach-O Bundle file
Mach_O_DynamicallyLinkedSharedLibStub_FileType, ///< Mach-O Shared lib stub
COFF_FileType ///< COFF object file or lib
};
/// This utility function allows any memory block to be examined in order

32
lib/System/Path.cpp
View File

@ -58,7 +58,14 @@ sys::IdentifyFileType(const char*magic, unsigned length) {
case '\177':
if (magic[1] == 'E' && magic[2] == 'L' && magic[3] == 'F')
return ELF_FileType;
if (length >= 18 && magic[17] == 0)
switch (magic[16]) {
default: break;
case 1: return ELF_Relocatable_FileType;
case 2: return ELF_Executable_FileType;
case 3: return ELF_SharedObject_FileType;
case 4: return ELF_Core_FileType;
}
break;
case 0xCE:
@ -67,10 +74,19 @@ sys::IdentifyFileType(const char*magic, unsigned length) {
// See the Mach-O section in /usr/share/file/magic for details.
if (magic[1] == char(0xFA) && magic[2] == char(0xED) &&
magic[3] == char(0xFE))
if (length >= 15)
if (magic[15] == 1 || magic[15] == 3 || magic[15] == 6 ||
magic[15] == 9)
return Mach_O_FileType;
if (length >= 14 && magic[13] == 0)
switch (magic[12]) {
default: break;
case 1: return Mach_O_Object_FileType;
case 2: return Mach_O_Executable_FileType;
case 3: return Mach_O_FixedVirtualMemorySharedLib_FileType;
case 4: return Mach_O_Core_FileType;
case 5: return Mach_O_PreloadExectuable_FileType;
case 6: return Mach_O_DynamicallyLinkedSharedLib_FileType;
case 7: return Mach_O_DynamicLinker_FileType;
case 8: return Mach_O_Bundle_FileType;
case 9: return Mach_O_DynamicallyLinkedSharedLibStub_FileType;
}
break;
case 0xF0: // PowerPC Windows
@ -108,8 +124,10 @@ Path::isDynamicLibrary() const {
if (getMagicNumber(Magic, 64))
switch (IdentifyFileType(Magic.c_str(), Magic.length())) {
default: return false;
case ELF_FileType:
case Mach_O_FileType:
case Mach_O_FixedVirtualMemorySharedLib_FileType:
case Mach_O_DynamicallyLinkedSharedLib_FileType:
case Mach_O_DynamicallyLinkedSharedLibStub_FileType:
case ELF_SharedObject_FileType:
case COFF_FileType: return true;
}
}