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108 lines
4.4 KiB
108 lines
4.4 KiB
4 months ago
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//===- ELFEmulation.cpp ---------------------------------------------------===//
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//
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// The MCLinker Project
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "mcld/Target/ELFEmulation.h"
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#include "mcld/LinkerScript.h"
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#include "mcld/LinkerConfig.h"
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#include "mcld/Script/InputSectDesc.h"
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#include <llvm/Support/Host.h>
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namespace mcld {
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struct NameMap {
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const char* from; ///< the prefix of the input string. (match FROM*)
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const char* to; ///< the output string.
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InputSectDesc::KeepPolicy policy; /// mark whether the input is kept in GC
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};
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static const NameMap map[] = {
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{".text*", ".text", InputSectDesc::NoKeep},
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{".rodata*", ".rodata", InputSectDesc::NoKeep},
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{".data.rel.ro.local*", ".data.rel.ro.local", InputSectDesc::NoKeep},
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{".data.rel.ro*", ".data.rel.ro", InputSectDesc::NoKeep},
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{".data*", ".data", InputSectDesc::NoKeep},
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{".bss*", ".bss", InputSectDesc::NoKeep},
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{".tdata*", ".tdata", InputSectDesc::NoKeep},
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{".tbss*", ".tbss", InputSectDesc::NoKeep},
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{".init", ".init", InputSectDesc::Keep},
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{".fini", ".fini", InputSectDesc::Keep},
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{".preinit_array*", ".preinit_array", InputSectDesc::Keep},
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{".init_array*", ".init_array", InputSectDesc::Keep},
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{".fini_array*", ".fini_array", InputSectDesc::Keep},
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// TODO: Support DT_INIT_ARRAY for all constructors?
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{".ctors*", ".ctors", InputSectDesc::Keep},
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{".dtors*", ".dtors", InputSectDesc::Keep},
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{".jcr", ".jcr", InputSectDesc::Keep},
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// FIXME: in GNU ld, if we are creating a shared object .sdata2 and .sbss2
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// sections would be handled differently.
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{".sdata2*", ".sdata", InputSectDesc::NoKeep},
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{".sbss2*", ".sbss", InputSectDesc::NoKeep},
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{".sdata*", ".sdata", InputSectDesc::NoKeep},
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{".sbss*", ".sbss", InputSectDesc::NoKeep},
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{".lrodata*", ".lrodata", InputSectDesc::NoKeep},
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{".ldata*", ".ldata", InputSectDesc::NoKeep},
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{".lbss*", ".lbss", InputSectDesc::NoKeep},
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{".gcc_except_table*", ".gcc_except_table", InputSectDesc::Keep},
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{".gnu.linkonce.d.rel.ro.local*", ".data.rel.ro.local", InputSectDesc::NoKeep}, // NOLINT
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{".gnu.linkonce.d.rel.ro*", ".data.rel.ro", InputSectDesc::NoKeep},
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{".gnu.linkonce.r*", ".rodata", InputSectDesc::NoKeep},
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{".gnu.linkonce.d*", ".data", InputSectDesc::NoKeep},
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{".gnu.linkonce.b*", ".bss", InputSectDesc::NoKeep},
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{".gnu.linkonce.sb2*", ".sbss", InputSectDesc::NoKeep},
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{".gnu.linkonce.sb*", ".sbss", InputSectDesc::NoKeep},
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{".gnu.linkonce.s2*", ".sdata", InputSectDesc::NoKeep},
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{".gnu.linkonce.s*", ".sdata", InputSectDesc::NoKeep},
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{".gnu.linkonce.wi*", ".debug_info", InputSectDesc::NoKeep},
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{".gnu.linkonce.td*", ".tdata", InputSectDesc::NoKeep},
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{".gnu.linkonce.tb*", ".tbss", InputSectDesc::NoKeep},
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{".gnu.linkonce.t*", ".text", InputSectDesc::NoKeep},
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{".gnu.linkonce.lr*", ".lrodata", InputSectDesc::NoKeep},
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{".gnu.linkonce.lb*", ".lbss", InputSectDesc::NoKeep},
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{".gnu.linkonce.l*", ".ldata", InputSectDesc::NoKeep},
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};
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// FIXME: LinkerConfig& pConfig should be constant
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bool MCLDEmulateELF(LinkerScript& pScript, LinkerConfig& pConfig) {
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// set up section map
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if (pConfig.options().getScriptList().empty() &&
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pConfig.codeGenType() != LinkerConfig::Object) {
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const unsigned int map_size = (sizeof(map) / sizeof(map[0]));
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for (unsigned int i = 0; i < map_size; ++i) {
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std::pair<SectionMap::mapping, bool> res =
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pScript.sectionMap().insert(map[i].from, map[i].to, map[i].policy);
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if (!res.second)
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return false;
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}
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} else {
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// FIXME: this is the hack to help assignment processing in current
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// implementation.
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pScript.sectionMap().insert("", "");
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}
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if (!pConfig.options().nostdlib()) {
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// TODO: check if user sets the default search path instead via -Y option
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// set up default search path
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switch (pConfig.targets().triple().getOS()) {
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case llvm::Triple::NetBSD:
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pScript.directories().insert("=/usr/lib");
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break;
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case llvm::Triple::Win32:
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pScript.directories().insert("=/mingw/lib");
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break;
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default:
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pScript.directories().insert("=/lib");
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pScript.directories().insert("=/usr/lib");
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break;
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}
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}
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return true;
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}
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} // namespace mcld
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