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f88e9ada1e
This re-lands r333797 with a fix for big endian systems. Original commit message: This isn't encountered anywhere inside LLVM, so I wrote a test case to expose the issue and verify that it is fixed. The basic problem is that the macho_load_command union contains all load comamnd structs. Load command structs in 32-bit macho files can be 32-bit aligned instead of 64-bit aligned. There are some strange circumstances in which this can be exposed in a 64-bit macho if the load commands are invalid or if a 32-bit aligned load command is used. In the past we've worked around this type of problem with changes like r264232. llvm-svn: 333854
48 lines
2.0 KiB
C++
48 lines
2.0 KiB
C++
//===- unittest/BinaryFormat/MachOTest.cpp - MachO support tests ----------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/BinaryFormat/MachO.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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using namespace llvm::MachO;
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TEST(MachOTest, UnalignedLC) {
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unsigned char Valid32BitMachO[] = {
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0xCE, 0xFA, 0xED, 0xFE, 0x07, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00,
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0x02, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x70, 0x00, 0x00, 0x00,
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0x85, 0x80, 0x21, 0x01, 0x01, 0x00, 0x00, 0x00, 0x38, 0x00, 0x00, 0x00,
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0x5F, 0x5F, 0x50, 0x41, 0x47, 0x45, 0x5A, 0x45, 0x52, 0x4F, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x01, 0x00, 0x00, 0x00, 0x38, 0x00, 0x00, 0x00, 0x5F, 0x5F, 0x4C, 0x49,
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0x4E, 0x4B, 0x45, 0x44, 0x49, 0x54, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x40, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x30, 0x00, 0x00,
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0x8C, 0x0B, 0x00, 0x00, 0x07, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
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mach_header *Header =
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reinterpret_cast<mach_header *>(Valid32BitMachO);
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if (!sys::IsLittleEndianHost)
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swapStruct(*Header);
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ASSERT_EQ(Header->magic, MH_MAGIC);
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unsigned char *Current = Valid32BitMachO + sizeof(mach_header);
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unsigned char *BufferEnd =
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Valid32BitMachO + sizeof(mach_header) + Header->sizeofcmds;
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while (Current < BufferEnd) {
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macho_load_command *LC =
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reinterpret_cast<macho_load_command *>(Current);
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if (!sys::IsLittleEndianHost)
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swapStruct(LC->load_command_data);
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ASSERT_EQ(LC->load_command_data.cmd, LC_SEGMENT);
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Current += LC->load_command_data.cmdsize;
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}
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}
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