mirror of
https://github.com/c64scene-ar/llvm-6502.git
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019f851ab2
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30240 91177308-0d34-0410-b5e6-96231b3b80d8
707 lines
30 KiB
C++
707 lines
30 KiB
C++
//=== MachOWriter.h - Target-independent Mach-O writer support --*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by Nate Begeman and is distributed under the
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// University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the MachOWriter class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_MACHOWRITER_H
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#define LLVM_CODEGEN_MACHOWRITER_H
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#include "llvm/DerivedTypes.h"
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#include "llvm/CodeGen/MachineFunctionPass.h"
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#include "llvm/CodeGen/MachineRelocation.h"
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#include "llvm/Target/TargetData.h"
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#include "llvm/Target/TargetMachine.h"
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#include <list>
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namespace llvm {
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class GlobalVariable;
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class Mangler;
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class MachineCodeEmitter;
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class MachOCodeEmitter;
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/// MachOSym - This struct contains information about each symbol that is
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/// added to logical symbol table for the module. This is eventually
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/// turned into a real symbol table in the file.
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struct MachOSym {
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const GlobalValue *GV; // The global value this corresponds to.
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std::string GVName; // The mangled name of the global value.
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uint32_t n_strx; // index into the string table
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uint8_t n_type; // type flag
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uint8_t n_sect; // section number or NO_SECT
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int16_t n_desc; // see <mach-o/stab.h>
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uint64_t n_value; // value for this symbol (or stab offset)
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// Constants for the n_sect field
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// see <mach-o/nlist.h>
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enum { NO_SECT = 0 }; // symbol is not in any section
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// Constants for the n_type field
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// see <mach-o/nlist.h>
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enum { N_UNDF = 0x0, // undefined, n_sect == NO_SECT
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N_ABS = 0x2, // absolute, n_sect == NO_SECT
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N_SECT = 0xe, // defined in section number n_sect
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N_PBUD = 0xc, // prebound undefined (defined in a dylib)
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N_INDR = 0xa // indirect
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};
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// The following bits are OR'd into the types above. For example, a type
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// of 0x0f would be an external N_SECT symbol (0x0e | 0x01).
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enum { N_EXT = 0x01, // external symbol bit
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N_PEXT = 0x10 // private external symbol bit
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};
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// Constants for the n_desc field
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// see <mach-o/loader.h>
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enum { REFERENCE_FLAG_UNDEFINED_NON_LAZY = 0,
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REFERENCE_FLAG_UNDEFINED_LAZY = 1,
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REFERENCE_FLAG_DEFINED = 2,
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REFERENCE_FLAG_PRIVATE_DEFINED = 3,
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REFERENCE_FLAG_PRIVATE_UNDEFINED_NON_LAZY = 4,
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REFERENCE_FLAG_PRIVATE_UNDEFINED_LAZY = 5
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};
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enum { N_NO_DEAD_STRIP = 0x0020, // symbol is not to be dead stripped
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N_WEAK_REF = 0x0040, // symbol is weak referenced
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N_WEAK_DEF = 0x0080 // coalesced symbol is a weak definition
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};
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MachOSym(const GlobalValue *gv, std::string name, uint8_t sect);
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};
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/// MachOWriter - This class implements the common target-independent code for
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/// writing Mach-O files. Targets should derive a class from this to
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/// parameterize the output format.
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///
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class MachOWriter : public MachineFunctionPass {
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friend class MachOCodeEmitter;
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public:
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MachineCodeEmitter &getMachineCodeEmitter() const {
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return *(MachineCodeEmitter*)MCE;
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}
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~MachOWriter();
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typedef std::vector<unsigned char> DataBuffer;
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protected:
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MachOWriter(std::ostream &O, TargetMachine &TM);
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/// Output stream to send the resultant object file to.
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///
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std::ostream &O;
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/// Target machine description.
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///
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TargetMachine &TM;
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/// Mang - The object used to perform name mangling for this module.
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///
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Mangler *Mang;
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/// MCE - The MachineCodeEmitter object that we are exposing to emit machine
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/// code for functions to the .o file.
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MachOCodeEmitter *MCE;
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/// is64Bit/isLittleEndian - This information is inferred from the target
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/// machine directly, indicating what header values and flags to set.
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bool is64Bit, isLittleEndian;
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/// doInitialization - Emit the file header and all of the global variables
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/// for the module to the Mach-O file.
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bool doInitialization(Module &M);
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bool runOnMachineFunction(MachineFunction &MF);
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/// doFinalization - Now that the module has been completely processed, emit
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/// the Mach-O file to 'O'.
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bool doFinalization(Module &M);
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/// MachOHeader - This struct contains the header information about a
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/// specific architecture type/subtype pair that is emitted to the file.
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struct MachOHeader {
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uint32_t magic; // mach magic number identifier
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uint32_t cputype; // cpu specifier
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uint32_t cpusubtype; // machine specifier
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uint32_t filetype; // type of file
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uint32_t ncmds; // number of load commands
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uint32_t sizeofcmds; // the size of all the load commands
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uint32_t flags; // flags
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uint32_t reserved; // 64-bit only
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/// HeaderData - The actual data for the header which we are building
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/// up for emission to the file.
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DataBuffer HeaderData;
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// Constants for the cputype field
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// see <mach/machine.h>
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enum { CPU_TYPE_I386 = 7,
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CPU_TYPE_X86_64 = 7 | 0x1000000,
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CPU_TYPE_ARM = 12,
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CPU_TYPE_SPARC = 14,
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CPU_TYPE_POWERPC = 18,
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CPU_TYPE_POWERPC64 = 18 | 0x1000000
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};
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// Constants for the cpusubtype field
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// see <mach/machine.h>
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enum { CPU_SUBTYPE_I386_ALL = 3,
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CPU_SUBTYPE_X86_64_ALL = 3,
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CPU_SUBTYPE_ARM_ALL = 0,
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CPU_SUBTYPE_SPARC_ALL = 0,
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CPU_SUBTYPE_POWERPC_ALL = 0
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};
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// Constants for the filetype field
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// see <mach-o/loader.h> for additional info on the various types
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enum { MH_OBJECT = 1, // relocatable object file
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MH_EXECUTE = 2, // demand paged executable file
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MH_FVMLIB = 3, // fixed VM shared library file
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MH_CORE = 4, // core file
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MH_PRELOAD = 5, // preloaded executable file
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MH_DYLIB = 6, // dynamically bound shared library
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MH_DYLINKER = 7, // dynamic link editor
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MH_BUNDLE = 8, // dynamically bound bundle file
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MH_DYLIB_STUB = 9, // shared library stub for static linking only
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MH_DSYM = 10 // companion file wiht only debug sections
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};
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// Constants for the flags field
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enum { MH_NOUNDEFS = 1 << 0,
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// the object file has no undefined references
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MH_INCRLINK = 1 << 1,
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// the object file is the output of an incremental link against
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// a base file and cannot be link edited again
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MH_DYLDLINK = 1 << 2,
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// the object file is input for the dynamic linker and cannot be
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// statically link edited again.
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MH_BINDATLOAD = 1 << 3,
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// the object file's undefined references are bound by the
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// dynamic linker when loaded.
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MH_PREBOUND = 1 << 4,
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// the file has its dynamic undefined references prebound
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MH_SPLIT_SEGS = 1 << 5,
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// the file has its read-only and read-write segments split
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// see <mach/shared_memory_server.h>
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MH_LAZY_INIT = 1 << 6,
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// the shared library init routine is to be run lazily via
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// catching memory faults to its writable segments (obsolete)
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MH_TWOLEVEL = 1 << 7,
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// the image is using two-level namespace bindings
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MH_FORCE_FLAT = 1 << 8,
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// the executable is forcing all images to use flat namespace
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// bindings.
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MH_NOMULTIDEFS = 1 << 8,
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// this umbrella guarantees no multiple definitions of symbols
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// in its sub-images so the two-level namespace hints can
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// always be used.
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MH_NOFIXPREBINDING = 1 << 10,
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// do not have dyld notify the prebidning agent about this
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// executable.
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MH_PREBINDABLE = 1 << 11,
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// the binary is not prebound but can have its prebinding
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// redone. only used when MH_PREBOUND is not set.
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MH_ALLMODSBOUND = 1 << 12,
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// indicates that this binary binds to all two-level namespace
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// modules of its dependent libraries. Only used when
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// MH_PREBINDABLE and MH_TWOLEVEL are both set.
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MH_SUBSECTIONS_VIA_SYMBOLS = 1 << 13,
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// safe to divide up the sections into sub-sections via symbols
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// for dead code stripping.
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MH_CANONICAL = 1 << 14,
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// the binary has been canonicalized via the unprebind operation
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MH_WEAK_DEFINES = 1 << 15,
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// the final linked image contains external weak symbols
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MH_BINDS_TO_WEAK = 1 << 16,
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// the final linked image uses weak symbols
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MH_ALLOW_STACK_EXECUTION = 1 << 17
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// When this bit is set, all stacks in the task will be given
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// stack execution privilege. Only used in MH_EXECUTE filetype
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};
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MachOHeader() : magic(0), cputype(0), cpusubtype(0), filetype(0),
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ncmds(0), sizeofcmds(0), flags(0), reserved(0) { }
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/// cmdSize - This routine returns the size of the MachOSection as written
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/// to disk, depending on whether the destination is a 64 bit Mach-O file.
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unsigned cmdSize(bool is64Bit) const {
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if (is64Bit)
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return 8 * sizeof(uint32_t);
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else
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return 7 * sizeof(uint32_t);
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}
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/// setMagic - This routine sets the appropriate value for the 'magic'
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/// field based on pointer size and endianness.
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void setMagic(bool isLittleEndian, bool is64Bit) {
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if (isLittleEndian)
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if (is64Bit) magic = 0xcffaedfe;
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else magic = 0xcefaedfe;
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else
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if (is64Bit) magic = 0xfeedfacf;
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else magic = 0xfeedface;
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}
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};
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/// Header - An instance of MachOHeader that we will update while we build
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/// the file, and then emit during finalization.
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MachOHeader Header;
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/// MachOSegment - This struct contains the necessary information to
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/// emit the load commands for each section in the file.
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struct MachOSegment {
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uint32_t cmd; // LC_SEGMENT or LC_SEGMENT_64
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uint32_t cmdsize; // Total size of this struct and section commands
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std::string segname; // segment name
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uint64_t vmaddr; // address of this segment
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uint64_t vmsize; // size of this segment, may be larger than filesize
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uint64_t fileoff; // offset in file
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uint64_t filesize; // amount to read from file
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uint32_t maxprot; // maximum VM protection
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uint32_t initprot; // initial VM protection
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uint32_t nsects; // number of sections in this segment
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uint32_t flags; // flags
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// Constants for the vm protection fields
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// see <mach-o/vm_prot.h>
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enum { VM_PROT_NONE = 0x00,
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VM_PROT_READ = 0x01, // read permission
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VM_PROT_WRITE = 0x02, // write permission
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VM_PROT_EXECUTE = 0x04, // execute permission,
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VM_PROT_ALL = 0x07
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};
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// Constants for the cmd field
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// see <mach-o/loader.h>
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enum { LC_SEGMENT = 0x01, // segment of this file to be mapped
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LC_SEGMENT_64 = 0x19 // 64-bit segment of this file to be mapped
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};
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/// cmdSize - This routine returns the size of the MachOSection as written
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/// to disk, depending on whether the destination is a 64 bit Mach-O file.
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unsigned cmdSize(bool is64Bit) const {
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if (is64Bit)
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return 6 * sizeof(uint32_t) + 4 * sizeof(uint64_t) + 16;
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else
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return 10 * sizeof(uint32_t) + 16; // addresses only 32 bits
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}
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MachOSegment(const std::string &seg, bool is64Bit)
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: cmd(is64Bit ? LC_SEGMENT_64 : LC_SEGMENT), cmdsize(0), segname(seg),
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vmaddr(0), vmsize(0), fileoff(0), filesize(0), maxprot(VM_PROT_ALL),
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initprot(VM_PROT_ALL), nsects(0), flags(0) { }
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};
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/// MachORelocation - This struct contains information about each relocation
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/// that needs to be emitted to the file.
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/// see <mach-o/reloc.h>
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struct MachORelocation {
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uint32_t r_address; // offset in the section to what is being relocated
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uint32_t r_symbolnum; // symbol index if r_extern == 1 else section index
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bool r_pcrel; // was relocated pc-relative already
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uint8_t r_length; // length = 2 ^ r_length
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bool r_extern; //
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uint8_t r_type; // if not 0, machine-specific relocation type.
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uint32_t getPackedFields() {
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return (r_symbolnum << 8) | (r_pcrel << 7) | ((r_length & 3) << 5) |
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(r_extern << 4) | (r_type & 15);
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}
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MachORelocation(uint32_t addr, uint32_t index, bool pcrel, uint8_t len,
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bool ext, uint8_t type) : r_address(addr),
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r_symbolnum(index), r_pcrel(pcrel), r_length(len), r_extern(ext),
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r_type(type) {}
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};
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/// MachOSection - This struct contains information about each section in a
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/// particular segment that is emitted to the file. This is eventually
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/// turned into the SectionCommand in the load command for a particlar
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/// segment.
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struct MachOSection {
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std::string sectname; // name of this section,
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std::string segname; // segment this section goes in
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uint64_t addr; // memory address of this section
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uint64_t size; // size in bytes of this section
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uint32_t offset; // file offset of this section
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uint32_t align; // section alignment (power of 2)
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uint32_t reloff; // file offset of relocation entries
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uint32_t nreloc; // number of relocation entries
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uint32_t flags; // flags (section type and attributes)
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uint32_t reserved1; // reserved (for offset or index)
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uint32_t reserved2; // reserved (for count or sizeof)
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uint32_t reserved3; // reserved (64 bit only)
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/// A unique number for this section, which will be used to match symbols
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/// to the correct section.
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uint32_t Index;
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/// SectionData - The actual data for this section which we are building
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/// up for emission to the file.
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DataBuffer SectionData;
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/// RelocBuffer - A buffer to hold the mach-o relocations before we write
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/// them out at the appropriate location in the file.
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DataBuffer RelocBuffer;
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/// Relocations - The relocations that we have encountered so far in this
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/// section that we will need to convert to MachORelocation entries when
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/// the file is written.
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std::vector<MachineRelocation> Relocations;
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// Constants for the section types (low 8 bits of flags field)
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// see <mach-o/loader.h>
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enum { S_REGULAR = 0,
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// regular section
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S_ZEROFILL = 1,
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// zero fill on demand section
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S_CSTRING_LITERALS = 2,
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// section with only literal C strings
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S_4BYTE_LITERALS = 3,
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// section with only 4 byte literals
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S_8BYTE_LITERALS = 4,
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// section with only 8 byte literals
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S_LITERAL_POINTERS = 5,
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// section with only pointers to literals
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S_NON_LAZY_SYMBOL_POINTERS = 6,
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// section with only non-lazy symbol pointers
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S_LAZY_SYMBOL_POINTERS = 7,
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// section with only lazy symbol pointers
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S_SYMBOL_STUBS = 8,
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// section with only symbol stubs
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// byte size of stub in the reserved2 field
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S_MOD_INIT_FUNC_POINTERS = 9,
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// section with only function pointers for initialization
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S_MOD_TERM_FUNC_POINTERS = 10,
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// section with only function pointers for termination
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S_COALESCED = 11,
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// section contains symbols that are coalesced
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S_GB_ZEROFILL = 12,
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// zero fill on demand section (that can be larger than 4GB)
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S_INTERPOSING = 13,
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// section with only pairs of function pointers for interposing
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S_16BYTE_LITERALS = 14
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// section with only 16 byte literals
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};
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// Constants for the section flags (high 24 bits of flags field)
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// see <mach-o/loader.h>
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enum { S_ATTR_PURE_INSTRUCTIONS = 1 << 31,
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// section contains only true machine instructions
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S_ATTR_NO_TOC = 1 << 30,
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// section contains coalesced symbols that are not to be in a
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// ranlib table of contents
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S_ATTR_STRIP_STATIC_SYMS = 1 << 29,
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// ok to strip static symbols in this section in files with the
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// MY_DYLDLINK flag
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S_ATTR_NO_DEAD_STRIP = 1 << 28,
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// no dead stripping
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S_ATTR_LIVE_SUPPORT = 1 << 27,
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// blocks are live if they reference live blocks
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S_ATTR_SELF_MODIFYING_CODE = 1 << 26,
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// used with i386 code stubs written on by dyld
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S_ATTR_DEBUG = 1 << 25,
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// a debug section
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S_ATTR_SOME_INSTRUCTIONS = 1 << 10,
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// section contains some machine instructions
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S_ATTR_EXT_RELOC = 1 << 9,
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// section has external relocation entries
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S_ATTR_LOC_RELOC = 1 << 8
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// section has local relocation entries
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};
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/// cmdSize - This routine returns the size of the MachOSection as written
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/// to disk, depending on whether the destination is a 64 bit Mach-O file.
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unsigned cmdSize(bool is64Bit) const {
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if (is64Bit)
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return 7 * sizeof(uint32_t) + 2 * sizeof(uint64_t) + 32;
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else
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return 9 * sizeof(uint32_t) + 32; // addresses only 32 bits
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}
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MachOSection(const std::string &seg, const std::string §)
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: sectname(sect), segname(seg), addr(0), size(0), offset(0), align(2),
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reloff(0), nreloc(0), flags(0), reserved1(0), reserved2(0),
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reserved3(0) { }
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};
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private:
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/// SectionList - This is the list of sections that we have emitted to the
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/// file. Once the file has been completely built, the segment load command
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/// SectionCommands are constructed from this info.
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std::list<MachOSection> SectionList;
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/// SectionLookup - This is a mapping from section name to SectionList entry
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std::map<std::string, MachOSection*> SectionLookup;
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/// getSection - Return the section with the specified name, creating a new
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/// section if one does not already exist.
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MachOSection &getSection(const std::string &seg, const std::string §,
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unsigned Flags = 0) {
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MachOSection *&SN = SectionLookup[seg+sect];
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if (SN) return *SN;
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SectionList.push_back(MachOSection(seg, sect));
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SN = &SectionList.back();
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SN->Index = SectionList.size();
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SN->flags = MachOSection::S_REGULAR | Flags;
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return *SN;
|
|
}
|
|
MachOSection &getTextSection(bool isCode = true) {
|
|
if (isCode)
|
|
return getSection("__TEXT", "__text",
|
|
MachOSection::S_ATTR_PURE_INSTRUCTIONS |
|
|
MachOSection::S_ATTR_SOME_INSTRUCTIONS);
|
|
else
|
|
return getSection("__TEXT", "__text");
|
|
}
|
|
MachOSection &getBSSSection() {
|
|
return getSection("__DATA", "__bss", MachOSection::S_ZEROFILL);
|
|
}
|
|
MachOSection &getDataSection() {
|
|
return getSection("__DATA", "__data");
|
|
}
|
|
MachOSection &getConstSection(const Type *Ty) {
|
|
// FIXME: support cstring literals and pointer literal
|
|
if (Ty->isPrimitiveType()) {
|
|
unsigned Size = TM.getTargetData()->getTypeSize(Ty);
|
|
switch(Size) {
|
|
default: break; // Fall through to __TEXT,__const
|
|
case 4:
|
|
return getSection("__TEXT", "__literal4",
|
|
MachOSection::S_4BYTE_LITERALS);
|
|
case 8:
|
|
return getSection("__TEXT", "__literal8",
|
|
MachOSection::S_8BYTE_LITERALS);
|
|
case 16:
|
|
return getSection("__TEXT", "__literal16",
|
|
MachOSection::S_16BYTE_LITERALS);
|
|
}
|
|
}
|
|
return getSection("__TEXT", "__const");
|
|
}
|
|
MachOSection &getJumpTableSection() {
|
|
if (TM.getRelocationModel() == Reloc::PIC_)
|
|
return getTextSection(false);
|
|
else
|
|
return getSection("__TEXT", "__const");
|
|
}
|
|
|
|
/// MachOSymTab - This struct contains information about the offsets and
|
|
/// size of symbol table information.
|
|
/// segment.
|
|
struct MachOSymTab {
|
|
uint32_t cmd; // LC_SYMTAB
|
|
uint32_t cmdsize; // sizeof( MachOSymTab )
|
|
uint32_t symoff; // symbol table offset
|
|
uint32_t nsyms; // number of symbol table entries
|
|
uint32_t stroff; // string table offset
|
|
uint32_t strsize; // string table size in bytes
|
|
|
|
// Constants for the cmd field
|
|
// see <mach-o/loader.h>
|
|
enum { LC_SYMTAB = 0x02 // link-edit stab symbol table info
|
|
};
|
|
|
|
MachOSymTab() : cmd(LC_SYMTAB), cmdsize(6 * sizeof(uint32_t)), symoff(0),
|
|
nsyms(0), stroff(0), strsize(0) { }
|
|
};
|
|
|
|
/// MachOSymTab - This struct contains information about the offsets and
|
|
/// size of symbol table information.
|
|
/// segment.
|
|
struct MachODySymTab {
|
|
uint32_t cmd; // LC_DYSYMTAB
|
|
uint32_t cmdsize; // sizeof( MachODySymTab )
|
|
uint32_t ilocalsym; // index to local symbols
|
|
uint32_t nlocalsym; // number of local symbols
|
|
uint32_t iextdefsym; // index to externally defined symbols
|
|
uint32_t nextdefsym; // number of externally defined symbols
|
|
uint32_t iundefsym; // index to undefined symbols
|
|
uint32_t nundefsym; // number of undefined symbols
|
|
uint32_t tocoff; // file offset to table of contents
|
|
uint32_t ntoc; // number of entries in table of contents
|
|
uint32_t modtaboff; // file offset to module table
|
|
uint32_t nmodtab; // number of module table entries
|
|
uint32_t extrefsymoff; // offset to referenced symbol table
|
|
uint32_t nextrefsyms; // number of referenced symbol table entries
|
|
uint32_t indirectsymoff; // file offset to the indirect symbol table
|
|
uint32_t nindirectsyms; // number of indirect symbol table entries
|
|
uint32_t extreloff; // offset to external relocation entries
|
|
uint32_t nextrel; // number of external relocation entries
|
|
uint32_t locreloff; // offset to local relocation entries
|
|
uint32_t nlocrel; // number of local relocation entries
|
|
|
|
// Constants for the cmd field
|
|
// see <mach-o/loader.h>
|
|
enum { LC_DYSYMTAB = 0x0B // dynamic link-edit symbol table info
|
|
};
|
|
|
|
MachODySymTab() : cmd(LC_DYSYMTAB), cmdsize(20 * sizeof(uint32_t)),
|
|
ilocalsym(0), nlocalsym(0), iextdefsym(0), nextdefsym(0),
|
|
iundefsym(0), nundefsym(0), tocoff(0), ntoc(0), modtaboff(0),
|
|
nmodtab(0), extrefsymoff(0), nextrefsyms(0), indirectsymoff(0),
|
|
nindirectsyms(0), extreloff(0), nextrel(0), locreloff(0), nlocrel(0) { }
|
|
};
|
|
|
|
/// SymTab - The "stab" style symbol table information
|
|
MachOSymTab SymTab;
|
|
/// DySymTab - symbol table info for the dynamic link editor
|
|
MachODySymTab DySymTab;
|
|
|
|
struct MachOSymCmp {
|
|
bool operator()(const MachOSym &LHS, const MachOSym &RHS) {
|
|
return LHS.GVName < RHS.GVName;
|
|
}
|
|
};
|
|
|
|
/// PartitionByLocal - Simple boolean predicate that returns true if Sym is
|
|
/// a local symbol rather than an external symbol.
|
|
static bool PartitionByLocal(const MachOSym &Sym);
|
|
|
|
/// PartitionByDefined - Simple boolean predicate that returns true if Sym
|
|
/// is defined in this module.
|
|
static bool PartitionByDefined(const MachOSym &Sym);
|
|
|
|
protected:
|
|
|
|
/// SymbolTable - This is the list of symbols we have emitted to the file.
|
|
/// This actually gets rearranged before emission to the file (to put the
|
|
/// local symbols first in the list).
|
|
std::vector<MachOSym> SymbolTable;
|
|
|
|
/// SymT - A buffer to hold the symbol table before we write it out at the
|
|
/// appropriate location in the file.
|
|
DataBuffer SymT;
|
|
|
|
/// StrT - A buffer to hold the string table before we write it out at the
|
|
/// appropriate location in the file.
|
|
DataBuffer StrT;
|
|
|
|
/// PendingSyms - This is a list of externally defined symbols that we have
|
|
/// been asked to emit, but have not seen a reference to. When a reference
|
|
/// is seen, the symbol will move from this list to the SymbolTable.
|
|
std::vector<MachOSym> PendingSyms;
|
|
|
|
/// DynamicSymbolTable - This is just a vector of indices into
|
|
/// SymbolTable to aid in emitting the DYSYMTAB load command.
|
|
std::vector<unsigned> DynamicSymbolTable;
|
|
|
|
// align - Emit padding into the file until the current output position is
|
|
// aligned to the specified power of two boundary.
|
|
static void align(DataBuffer &Output, unsigned Boundary) {
|
|
assert(Boundary && (Boundary & (Boundary-1)) == 0 &&
|
|
"Must align to 2^k boundary");
|
|
size_t Size = Output.size();
|
|
if (Size & (Boundary-1)) {
|
|
// Add padding to get alignment to the correct place.
|
|
size_t Pad = Boundary-(Size & (Boundary-1));
|
|
Output.resize(Size+Pad);
|
|
}
|
|
}
|
|
|
|
void outbyte(DataBuffer &Output, unsigned char X) {
|
|
Output.push_back(X);
|
|
}
|
|
void outhalf(DataBuffer &Output, unsigned short X) {
|
|
if (isLittleEndian) {
|
|
Output.push_back(X&255);
|
|
Output.push_back(X >> 8);
|
|
} else {
|
|
Output.push_back(X >> 8);
|
|
Output.push_back(X&255);
|
|
}
|
|
}
|
|
void outword(DataBuffer &Output, unsigned X) {
|
|
if (isLittleEndian) {
|
|
Output.push_back((X >> 0) & 255);
|
|
Output.push_back((X >> 8) & 255);
|
|
Output.push_back((X >> 16) & 255);
|
|
Output.push_back((X >> 24) & 255);
|
|
} else {
|
|
Output.push_back((X >> 24) & 255);
|
|
Output.push_back((X >> 16) & 255);
|
|
Output.push_back((X >> 8) & 255);
|
|
Output.push_back((X >> 0) & 255);
|
|
}
|
|
}
|
|
void outxword(DataBuffer &Output, uint64_t X) {
|
|
if (isLittleEndian) {
|
|
Output.push_back(unsigned(X >> 0) & 255);
|
|
Output.push_back(unsigned(X >> 8) & 255);
|
|
Output.push_back(unsigned(X >> 16) & 255);
|
|
Output.push_back(unsigned(X >> 24) & 255);
|
|
Output.push_back(unsigned(X >> 32) & 255);
|
|
Output.push_back(unsigned(X >> 40) & 255);
|
|
Output.push_back(unsigned(X >> 48) & 255);
|
|
Output.push_back(unsigned(X >> 56) & 255);
|
|
} else {
|
|
Output.push_back(unsigned(X >> 56) & 255);
|
|
Output.push_back(unsigned(X >> 48) & 255);
|
|
Output.push_back(unsigned(X >> 40) & 255);
|
|
Output.push_back(unsigned(X >> 32) & 255);
|
|
Output.push_back(unsigned(X >> 24) & 255);
|
|
Output.push_back(unsigned(X >> 16) & 255);
|
|
Output.push_back(unsigned(X >> 8) & 255);
|
|
Output.push_back(unsigned(X >> 0) & 255);
|
|
}
|
|
}
|
|
void outaddr32(DataBuffer &Output, unsigned X) {
|
|
outword(Output, X);
|
|
}
|
|
void outaddr64(DataBuffer &Output, uint64_t X) {
|
|
outxword(Output, X);
|
|
}
|
|
void outaddr(DataBuffer &Output, uint64_t X) {
|
|
if (!is64Bit)
|
|
outword(Output, (unsigned)X);
|
|
else
|
|
outxword(Output, X);
|
|
}
|
|
void outstring(DataBuffer &Output, std::string &S, unsigned Length) {
|
|
unsigned len_to_copy = S.length() < Length ? S.length() : Length;
|
|
unsigned len_to_fill = S.length() < Length ? Length-S.length() : 0;
|
|
|
|
for (unsigned i = 0; i < len_to_copy; ++i)
|
|
outbyte(Output, S[i]);
|
|
|
|
for (unsigned i = 0; i < len_to_fill; ++i)
|
|
outbyte(Output, 0);
|
|
|
|
}
|
|
void fixhalf(DataBuffer &Output, unsigned short X, unsigned Offset) {
|
|
unsigned char *P = &Output[Offset];
|
|
P[0] = (X >> (isLittleEndian ? 0 : 8)) & 255;
|
|
P[1] = (X >> (isLittleEndian ? 8 : 0)) & 255;
|
|
}
|
|
void fixword(DataBuffer &Output, unsigned X, unsigned Offset) {
|
|
unsigned char *P = &Output[Offset];
|
|
P[0] = (X >> (isLittleEndian ? 0 : 24)) & 255;
|
|
P[1] = (X >> (isLittleEndian ? 8 : 16)) & 255;
|
|
P[2] = (X >> (isLittleEndian ? 16 : 8)) & 255;
|
|
P[3] = (X >> (isLittleEndian ? 24 : 0)) & 255;
|
|
}
|
|
|
|
private:
|
|
void AddSymbolToSection(MachOSection &MOS, GlobalVariable *GV);
|
|
void EmitGlobal(GlobalVariable *GV);
|
|
void EmitHeaderAndLoadCommands();
|
|
void EmitSections();
|
|
void BufferSymbolAndStringTable();
|
|
void CalculateRelocations(MachOSection &MOS, unsigned RelOffset);
|
|
|
|
virtual MachineRelocation GetJTRelocation(unsigned Offset,
|
|
MachineBasicBlock *MBB) = 0;
|
|
virtual void GetTargetRelocation(MachineRelocation &MR, MachOSection &MOS,
|
|
unsigned ToIndex) = 0;
|
|
};
|
|
}
|
|
|
|
#endif
|