1d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao//===- GNUInfo.h ----------------------------------------------------------===// 2d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao// 3d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao// The MCLinker Project 4d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao// 5d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao// This file is distributed under the University of Illinois Open Source 6d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao// License. See LICENSE.TXT for details. 7d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao// 8d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao//===----------------------------------------------------------------------===// 987f34658dec9097d987d254a990ea7f311bfc95fStephen Hines#ifndef MCLD_TARGET_GNUINFO_H 1087f34658dec9097d987d254a990ea7f311bfc95fStephen Hines#define MCLD_TARGET_GNUINFO_H 11d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao#include <llvm/ADT/Triple.h> 12d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao#include <llvm/Support/ELF.h> 13d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao 14d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liaonamespace mcld { 15d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao 16d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao/** \class GNUInfo 17d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao * \brief GNUInfo records ELF-dependent and target-dependnet data fields 18d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao */ 19d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liaoclass GNUInfo 20d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao{ 21d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liaopublic: 22d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao GNUInfo(const llvm::Triple& pTriple); 23d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao 24d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao virtual ~GNUInfo() { } 25d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao 26d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao /// ELFVersion - the value of e_ident[EI_VERSION] 27d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao virtual uint8_t ELFVersion() const { return llvm::ELF::EV_CURRENT; } 28d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao 29d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao /// The return value of machine() it the same as e_machine in the ELF header 30d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao virtual uint32_t machine() const = 0; 31d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao 32d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao /// OSABI - the value of e_ident[EI_OSABI] 33d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao uint8_t OSABI() const; 34d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao 35d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao /// ABIVersion - the value of e_ident[EI_ABIVRESION] 3687f34658dec9097d987d254a990ea7f311bfc95fStephen Hines virtual uint8_t ABIVersion() const { return 0x0; } 37d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao 386f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines /// defaultTextSegmentAddr - target should specify its own default start address 396f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines /// of the text segment. esp. for exec. 406f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines virtual uint64_t defaultTextSegmentAddr() const { return 0x0; } 416f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 426f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines /// flags - the value of ElfXX_Ehdr::e_flags 436f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines virtual uint64_t flags() const = 0; 446f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 456f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines /// entry - the symbol name of the entry point 466f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines virtual const char* entry() const { return "_start"; } 476f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 486f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines /// dyld - the name of the default dynamic linker 496f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines /// target may override this function if needed. 506f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines /// @ref gnu ld, bfd/elf32-i386.c:521 516f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines virtual const char* dyld() const { return "/usr/lib/libc.so.1"; } 526f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 536f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines /// isDefaultExecStack - target should specify whether the stack is default 546f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines /// executable. If target favors another choice, please override this function 556f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines virtual bool isDefaultExecStack() const { return true; } 566f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 576f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines /// commonPageSize - the common page size of the target machine, and we set it 586f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines /// to 4K here. If target favors the different size, please override this 596f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines virtual uint64_t commonPageSize() const { return 0x1000; } 606f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 616f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines /// abiPageSize - the abi page size of the target machine, and we set it to 4K 626f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines /// here. If target favors the different size, please override this function 636f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines virtual uint64_t abiPageSize() const { return 0x1000; } 646f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 6587f34658dec9097d987d254a990ea7f311bfc95fStephen Hinesprotected: 66d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao const llvm::Triple& m_Triple; 67d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao}; 68d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao 69d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao} // namespace of mcld 70d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao 71d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao#endif 72d0fbbb227051be16931a1aa9b4a7722ac039c698Shih-wei Liao 73