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//===----------------------------------------------------------------------===// 922add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao#include <mcld/Target/ELFEmulation.h> 10f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines#include <mcld/LinkerScript.h> 1122add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao#include <mcld/LinkerConfig.h> 12f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines#include <mcld/Script/InputSectDesc.h> 13cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao 146f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines#include <llvm/Support/Host.h> 156f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 16cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liaousing namespace mcld; 17cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao 18cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liaostruct NameMap { 1922add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao const char* from; ///< the prefix of the input string. (match FROM*) 2022add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao const char* to; ///< the output string. 21f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines InputSectDesc::KeepPolicy policy; /// mark whether the input is kept in GC 22cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao}; 23cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao 24cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liaostatic const NameMap map[] = 25cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao{ 26f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".text*", ".text", InputSectDesc::NoKeep}, 27f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".rodata*", ".rodata", InputSectDesc::NoKeep}, 28f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".data.rel.ro.local*", ".data.rel.ro.local", InputSectDesc::NoKeep}, 29f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".data.rel.ro*", ".data.rel.ro", InputSectDesc::NoKeep}, 30f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".data*", ".data", InputSectDesc::NoKeep}, 31f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".bss*", ".bss", InputSectDesc::NoKeep}, 32f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".tdata*", ".tdata", InputSectDesc::NoKeep}, 33f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".tbss*", ".tbss", InputSectDesc::NoKeep}, 34f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".init", ".init", InputSectDesc::Keep}, 35f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".fini", ".fini", InputSectDesc::Keep}, 36f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".preinit_array*", ".preinit_array", InputSectDesc::Keep}, 37f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".init_array*", ".init_array", InputSectDesc::Keep}, 38f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".fini_array*", ".fini_array", InputSectDesc::Keep}, 39cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao // TODO: Support DT_INIT_ARRAY for all constructors? 40f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".ctors*", ".ctors", InputSectDesc::Keep}, 41f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".dtors*", ".dtors", InputSectDesc::Keep}, 42f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".jcr", ".jcr", InputSectDesc::Keep}, 43cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao // FIXME: in GNU ld, if we are creating a shared object .sdata2 and .sbss2 44cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao // sections would be handled differently. 45f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".sdata2*", ".sdata", InputSectDesc::NoKeep}, 46f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".sbss2*", ".sbss", InputSectDesc::NoKeep}, 47f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".sdata*", ".sdata", InputSectDesc::NoKeep}, 48f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".sbss*", ".sbss", InputSectDesc::NoKeep}, 49f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".lrodata*", ".lrodata", InputSectDesc::NoKeep}, 50f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".ldata*", ".ldata", InputSectDesc::NoKeep}, 51f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".lbss*", ".lbss", InputSectDesc::NoKeep}, 52f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".gcc_except_table*", ".gcc_except_table", InputSectDesc::Keep}, 53f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".gnu.linkonce.d.rel.ro.local*", ".data.rel.ro.local", InputSectDesc::NoKeep}, 54f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".gnu.linkonce.d.rel.ro*", ".data.rel.ro", InputSectDesc::NoKeep}, 55f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".gnu.linkonce.r*", ".rodata", InputSectDesc::NoKeep}, 56f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".gnu.linkonce.d*", ".data", InputSectDesc::NoKeep}, 57f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".gnu.linkonce.b*", ".bss", InputSectDesc::NoKeep}, 58f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".gnu.linkonce.sb2*", ".sbss", InputSectDesc::NoKeep}, 59f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".gnu.linkonce.sb*", ".sbss", InputSectDesc::NoKeep}, 60f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".gnu.linkonce.s2*", ".sdata", InputSectDesc::NoKeep}, 61f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".gnu.linkonce.s*", ".sdata", InputSectDesc::NoKeep}, 62f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".gnu.linkonce.wi*", ".debug_info", InputSectDesc::NoKeep}, 63f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".gnu.linkonce.td*", ".tdata", InputSectDesc::NoKeep}, 64f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".gnu.linkonce.tb*", ".tbss", InputSectDesc::NoKeep}, 65f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".gnu.linkonce.t*", ".text", InputSectDesc::NoKeep}, 66f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".gnu.linkonce.lr*", ".lrodata", InputSectDesc::NoKeep}, 67f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".gnu.linkonce.lb*", ".lbss", InputSectDesc::NoKeep}, 68f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines {".gnu.linkonce.l*", ".ldata", InputSectDesc::NoKeep}, 69cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao}; 70cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao 71f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hinesbool mcld::MCLDEmulateELF(LinkerScript& pScript, LinkerConfig& pConfig) 72f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines// FIXME: LinkerConfig& pConfig should be constant 73cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao{ 746f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines // set up section map 75f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines if (pConfig.options().getScriptList().empty() && 76f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines pConfig.codeGenType() != LinkerConfig::Object) { 7722add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao const unsigned int map_size = (sizeof(map) / sizeof(map[0]) ); 7822add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao for (unsigned int i = 0; i < map_size; ++i) { 79f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines std::pair<SectionMap::mapping, bool> res = 80f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines pScript.sectionMap().insert(map[i].from, map[i].to, map[i].policy); 81f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines if (!res.second) 8222add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao return false; 83cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao } 84f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines } else { 85f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines // FIXME: this is the hack to help assignment processing in current 86f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines // implementation. 87f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines pScript.sectionMap().insert("", ""); 88cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao } 896f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 906f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines if (!pConfig.options().nostdlib()) { 916f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines // TODO: check if user sets the default search path instead via -Y option 926f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines // set up default search path 93f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines switch (pConfig.targets().triple().getOS()) { 94f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines case llvm::Triple::NetBSD: 95f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines pScript.directories().insert("=/usr/lib"); 96f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines break; 97f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines case llvm::Triple::MinGW32: 98f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines pScript.directories().insert("=/mingw/lib"); 99f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines break; 100f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines default: 101f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines pScript.directories().insert("=/lib"); 102f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines pScript.directories().insert("=/usr/lib"); 103f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines break; 1046f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines } 1056f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines } 10622add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao return true; 107cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao} 108cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao 109