ELFEmulation.cpp revision f7ac0f19a1c8d0ad14bcf6456ce368b830fea886
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> 12cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao 136f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines#include <llvm/Support/Host.h> 146f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 15cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liaousing namespace mcld; 16cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao 17cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liaostruct NameMap { 1822add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao const char* from; ///< the prefix of the input string. (match FROM*) 1922add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao const char* to; ///< the output string. 20cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao}; 21cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao 22cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liaostatic const NameMap map[] = 23cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao{ 24cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao {".text", ".text"}, 25cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao {".rodata", ".rodata"}, 26cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao {".data.rel.ro.local", ".data.rel.ro.local"}, 27cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao {".data.rel.ro", ".data.rel.ro"}, 28cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao {".data", ".data"}, 29cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao {".bss", ".bss"}, 30cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao {".tdata", ".tdata"}, 31cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao {".tbss", ".tbss"}, 32cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao {".init_array", ".init_array"}, 33cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao {".fini_array", ".fini_array"}, 34cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao // TODO: Support DT_INIT_ARRAY for all constructors? 35cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao {".ctors", ".ctors"}, 36cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao {".dtors", ".dtors"}, 37cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao // FIXME: in GNU ld, if we are creating a shared object .sdata2 and .sbss2 38cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao // sections would be handled differently. 39cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao {".sdata2", ".sdata"}, 40cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao {".sbss2", ".sbss"}, 4122add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao {".sdata", ".sdata"}, 4222add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao {".sbss", ".sbss"}, 43cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao {".lrodata", ".lrodata"}, 44cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao {".ldata", ".ldata"}, 45cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao {".lbss", ".lbss"}, 46cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao {".gcc_except_table", ".gcc_except_table"}, 47cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao {".gnu.linkonce.d.rel.ro.local", ".data.rel.ro.local"}, 48cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao {".gnu.linkonce.d.rel.ro", ".data.rel.ro"}, 49cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao {".gnu.linkonce.r", ".rodata"}, 50cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao {".gnu.linkonce.d", ".data"}, 51cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao {".gnu.linkonce.b", ".bss"}, 5222add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao {".gnu.linkonce.sb2", ".sbss"}, 53cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao {".gnu.linkonce.sb", ".sbss"}, 54cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao {".gnu.linkonce.s2", ".sdata"}, 5522add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao {".gnu.linkonce.s", ".sdata"}, 56cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao {".gnu.linkonce.wi", ".debug_info"}, 57cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao {".gnu.linkonce.td", ".tdata"}, 58cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao {".gnu.linkonce.tb", ".tbss"}, 5922add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao {".gnu.linkonce.t", ".text"}, 60cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao {".gnu.linkonce.lr", ".lrodata"}, 61cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao {".gnu.linkonce.lb", ".lbss"}, 6222add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao {".gnu.linkonce.l", ".ldata"}, 63cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao}; 64cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao 65f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hinesbool mcld::MCLDEmulateELF(LinkerScript& pScript, LinkerConfig& pConfig) 66f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines// FIXME: LinkerConfig& pConfig should be constant 67cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao{ 686f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines // set up section map 6922add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao if (pConfig.codeGenType() != LinkerConfig::Object) { 7022add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao const unsigned int map_size = (sizeof(map) / sizeof(map[0]) ); 7122add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao for (unsigned int i = 0; i < map_size; ++i) { 7222add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao bool exist = false; 73f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines pScript.sectionMap().append(map[i].from, map[i].to, exist); 7422add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao if (exist) 7522add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao return false; 76cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao } 77cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao } 786f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 796f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines if (!pConfig.options().nostdlib()) { 806f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines // TODO: check if user sets the default search path instead via -Y option 816f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines // set up default search path 82f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines switch (pConfig.targets().triple().getOS()) { 83f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines case llvm::Triple::NetBSD: 84f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines pScript.directories().insert("=/usr/lib"); 85f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines break; 86f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines case llvm::Triple::MinGW32: 87f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines pScript.directories().insert("=/mingw/lib"); 88f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines break; 89f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines default: 90f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines pScript.directories().insert("=/lib"); 91f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines pScript.directories().insert("=/usr/lib"); 92f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines break; 936f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines } 946f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines } 9522add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao return true; 96cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao} 97cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao 98