2e40cf06df
This initial implementation supports section and symbol parsing, but no relocation support. It enables JITLink to link and execute ELF relocatable objects that do not require relocations. Patch by Jared Wyles. Thanks Jared! Differential Revision: https://reviews.llvm.org/D79832
52 lines
1.5 KiB
C++
52 lines
1.5 KiB
C++
//===-------------- ELF.cpp - JIT linker function for ELF -------------===//
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//
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// The LLVM Compiler Infrastructure
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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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//
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// ELF jit-link function.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ExecutionEngine/JITLink/ELF.h"
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#include "llvm/BinaryFormat/ELF.h"
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#include "llvm/ExecutionEngine/JITLink/ELF_x86_64.h"
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#include "llvm/Support/Endian.h"
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#include "llvm/Support/Format.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include <cstring>
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using namespace llvm;
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#define DEBUG_TYPE "jitlink"
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namespace llvm {
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namespace jitlink {
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void jitLink_ELF(std::unique_ptr<JITLinkContext> Ctx) {
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// We don't want to do full ELF validation here. We just verify it is elf'ish.
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// Probably should parse into an elf header when we support more than x86 :)
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StringRef Data = Ctx->getObjectBuffer().getBuffer();
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if (Data.size() < llvm::ELF::EI_MAG3 + 1) {
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Ctx->notifyFailed(make_error<JITLinkError>("Truncated ELF buffer"));
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return;
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}
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if (!memcmp(Data.data(), llvm::ELF::ElfMagic, strlen(llvm::ELF::ElfMagic))) {
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if (Data.data()[llvm::ELF::EI_CLASS] == ELF::ELFCLASS64) {
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return jitLink_ELF_x86_64(std::move(Ctx));
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}
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}
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Ctx->notifyFailed(make_error<JITLinkError>("ELF magic not valid"));
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}
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} // end namespace jitlink
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} // end namespace llvm
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