1//===-------------- ELF.cpp - JIT linker function for ELF -------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// ELF jit-link function.
11//
12//===----------------------------------------------------------------------===//
13
14#include "llvm/ExecutionEngine/JITLink/ELF.h"
15
16#include "llvm/BinaryFormat/ELF.h"
17#include "llvm/ExecutionEngine/JITLink/ELF_x86_64.h"
18#include "llvm/Support/Endian.h"
19#include "llvm/Support/Format.h"
20#include "llvm/Support/MemoryBuffer.h"
21#include <cstring>
22
23using namespace llvm;
24
25#define DEBUG_TYPE "jitlink"
26
27namespace llvm {
28namespace jitlink {
29
30void jitLink_ELF(std::unique_ptr<JITLinkContext> Ctx) {
31
32  // We don't want to do full ELF validation here. We just verify it is elf'ish.
33  // Probably should parse into an elf header when we support more than x86 :)
34
35  StringRef Data = Ctx->getObjectBuffer().getBuffer();
36  if (Data.size() < llvm::ELF::EI_MAG3 + 1) {
37    Ctx->notifyFailed(make_error<JITLinkError>("Truncated ELF buffer"));
38    return;
39  }
40
41  if (!memcmp(Data.data(), llvm::ELF::ElfMagic, strlen(llvm::ELF::ElfMagic))) {
42    if (Data.data()[llvm::ELF::EI_CLASS] == ELF::ELFCLASS64) {
43      return jitLink_ELF_x86_64(std::move(Ctx));
44    }
45  }
46
47  Ctx->notifyFailed(make_error<JITLinkError>("ELF magic not valid"));
48}
49
50} // end namespace jitlink
51} // end namespace llvm
52