122add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao//===- ELFEmulation.cpp ---------------------------------------------------===// 2cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao// 3cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao// The MCLinker Project 4cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao// 5cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao// This file is distributed under the University of Illinois Open Source 6cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao// License. See LICENSE.TXT for details. 7cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao// 8cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao//===----------------------------------------------------------------------===// 937b74a387bb3993387029859c2d9d051c41c724eStephen Hines#include "mcld/Target/ELFEmulation.h" 1037b74a387bb3993387029859c2d9d051c41c724eStephen Hines#include "mcld/LinkerScript.h" 1137b74a387bb3993387029859c2d9d051c41c724eStephen Hines#include "mcld/LinkerConfig.h" 1237b74a387bb3993387029859c2d9d051c41c724eStephen Hines#include "mcld/Script/InputSectDesc.h" 13cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao 146f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines#include <llvm/Support/Host.h> 156f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 1637b74a387bb3993387029859c2d9d051c41c724eStephen Hinesnamespace mcld { 17cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao 18cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liaostruct NameMap { 1937b74a387bb3993387029859c2d9d051c41c724eStephen Hines const char* from; ///< the prefix of the input string. (match FROM*) 2037b74a387bb3993387029859c2d9d051c41c724eStephen Hines const char* to; ///< the output string. 2137b74a387bb3993387029859c2d9d051c41c724eStephen Hines InputSectDesc::KeepPolicy policy; /// mark whether the input is kept in GC 22cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao}; 23cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao 2437b74a387bb3993387029859c2d9d051c41c724eStephen Hinesstatic const NameMap map[] = { 2537b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".text*", ".text", InputSectDesc::NoKeep}, 2637b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".rodata*", ".rodata", InputSectDesc::NoKeep}, 2737b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".data.rel.ro.local*", ".data.rel.ro.local", InputSectDesc::NoKeep}, 2837b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".data.rel.ro*", ".data.rel.ro", InputSectDesc::NoKeep}, 2937b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".data*", ".data", InputSectDesc::NoKeep}, 3037b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".bss*", ".bss", InputSectDesc::NoKeep}, 3137b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".tdata*", ".tdata", InputSectDesc::NoKeep}, 3237b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".tbss*", ".tbss", InputSectDesc::NoKeep}, 3337b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".init", ".init", InputSectDesc::Keep}, 3437b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".fini", ".fini", InputSectDesc::Keep}, 3537b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".preinit_array*", ".preinit_array", InputSectDesc::Keep}, 3637b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".init_array*", ".init_array", InputSectDesc::Keep}, 3737b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".fini_array*", ".fini_array", InputSectDesc::Keep}, 3837b74a387bb3993387029859c2d9d051c41c724eStephen Hines // TODO: Support DT_INIT_ARRAY for all constructors? 3937b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".ctors*", ".ctors", InputSectDesc::Keep}, 4037b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".dtors*", ".dtors", InputSectDesc::Keep}, 4137b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".jcr", ".jcr", InputSectDesc::Keep}, 4237b74a387bb3993387029859c2d9d051c41c724eStephen Hines // FIXME: in GNU ld, if we are creating a shared object .sdata2 and .sbss2 4337b74a387bb3993387029859c2d9d051c41c724eStephen Hines // sections would be handled differently. 4437b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".sdata2*", ".sdata", InputSectDesc::NoKeep}, 4537b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".sbss2*", ".sbss", InputSectDesc::NoKeep}, 4637b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".sdata*", ".sdata", InputSectDesc::NoKeep}, 4737b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".sbss*", ".sbss", InputSectDesc::NoKeep}, 4837b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".lrodata*", ".lrodata", InputSectDesc::NoKeep}, 4937b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".ldata*", ".ldata", InputSectDesc::NoKeep}, 5037b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".lbss*", ".lbss", InputSectDesc::NoKeep}, 5137b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".gcc_except_table*", ".gcc_except_table", InputSectDesc::Keep}, 5237b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".gnu.linkonce.d.rel.ro.local*", ".data.rel.ro.local", InputSectDesc::NoKeep}, // NOLINT 5337b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".gnu.linkonce.d.rel.ro*", ".data.rel.ro", InputSectDesc::NoKeep}, 5437b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".gnu.linkonce.r*", ".rodata", InputSectDesc::NoKeep}, 5537b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".gnu.linkonce.d*", ".data", InputSectDesc::NoKeep}, 5637b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".gnu.linkonce.b*", ".bss", InputSectDesc::NoKeep}, 5737b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".gnu.linkonce.sb2*", ".sbss", InputSectDesc::NoKeep}, 5837b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".gnu.linkonce.sb*", ".sbss", InputSectDesc::NoKeep}, 5937b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".gnu.linkonce.s2*", ".sdata", InputSectDesc::NoKeep}, 6037b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".gnu.linkonce.s*", ".sdata", InputSectDesc::NoKeep}, 6137b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".gnu.linkonce.wi*", ".debug_info", InputSectDesc::NoKeep}, 6237b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".gnu.linkonce.td*", ".tdata", InputSectDesc::NoKeep}, 6337b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".gnu.linkonce.tb*", ".tbss", InputSectDesc::NoKeep}, 6437b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".gnu.linkonce.t*", ".text", InputSectDesc::NoKeep}, 6537b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".gnu.linkonce.lr*", ".lrodata", InputSectDesc::NoKeep}, 6637b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".gnu.linkonce.lb*", ".lbss", InputSectDesc::NoKeep}, 6737b74a387bb3993387029859c2d9d051c41c724eStephen Hines {".gnu.linkonce.l*", ".ldata", InputSectDesc::NoKeep}, 68cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao}; 69cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao 70f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines// FIXME: LinkerConfig& pConfig should be constant 7137b74a387bb3993387029859c2d9d051c41c724eStephen Hinesbool MCLDEmulateELF(LinkerScript& pScript, LinkerConfig& pConfig) { 726f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines // set up section map 73f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines if (pConfig.options().getScriptList().empty() && 74f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines pConfig.codeGenType() != LinkerConfig::Object) { 7537b74a387bb3993387029859c2d9d051c41c724eStephen Hines const unsigned int map_size = (sizeof(map) / sizeof(map[0])); 7622add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao for (unsigned int i = 0; i < map_size; ++i) { 77f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines std::pair<SectionMap::mapping, bool> res = 7837b74a387bb3993387029859c2d9d051c41c724eStephen Hines pScript.sectionMap().insert(map[i].from, map[i].to, map[i].policy); 79f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines if (!res.second) 8022add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao return false; 81cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao } 82f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines } else { 83f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines // FIXME: this is the hack to help assignment processing in current 84f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines // implementation. 85f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines pScript.sectionMap().insert("", ""); 86cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao } 876f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 886f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines if (!pConfig.options().nostdlib()) { 896f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines // TODO: check if user sets the default search path instead via -Y option 906f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines // set up default search path 91f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines switch (pConfig.targets().triple().getOS()) { 92f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines case llvm::Triple::NetBSD: 93f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines pScript.directories().insert("=/usr/lib"); 94f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines break; 9537b74a387bb3993387029859c2d9d051c41c724eStephen Hines case llvm::Triple::Win32: 96f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines pScript.directories().insert("=/mingw/lib"); 97f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines break; 98f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines default: 99f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines pScript.directories().insert("=/lib"); 100f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines pScript.directories().insert("=/usr/lib"); 101f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines break; 1026f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines } 1036f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines } 10422add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao return true; 105cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao} 106cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao 10737b74a387bb3993387029859c2d9d051c41c724eStephen Hines} // namespace mcld 108