1 files changed, 197 insertions, 0 deletions
diff --git a/contrib/llvm/lib/MC/MCSectionELF.cpp b/contrib/llvm/lib/MC/MCSectionELF.cpp
new file mode 100644
index 000000000000..7ee1694ebbf7
--- /dev/null
+++ b/contrib/llvm/lib/MC/MCSectionELF.cpp
@@ -0,0 +1,197 @@
+//===- lib/MC/MCSectionELF.cpp - ELF Code Section Representation ----------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/MC/MCSectionELF.h"
+#include "llvm/ADT/Triple.h"
+#include "llvm/BinaryFormat/ELF.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/raw_ostream.h"
+#include <cassert>
+
+using namespace llvm;
+
+MCSectionELF::~MCSectionELF() = default; // anchor.
+
+// Decides whether a '.section' directive
+// should be printed before the section name.
+bool MCSectionELF::ShouldOmitSectionDirective(StringRef Name,
+                                              const MCAsmInfo &MAI) const {
+  if (isUnique())
+    return false;
+
+  return MAI.shouldOmitSectionDirective(Name);
+}
+
+static void printName(raw_ostream &OS, StringRef Name) {
+  if (Name.find_first_not_of("0123456789_."
+                             "abcdefghijklmnopqrstuvwxyz"
+                             "ABCDEFGHIJKLMNOPQRSTUVWXYZ") == Name.npos) {
+    OS << Name;
+    return;
+  }
+  OS << '"';
+  for (const char *B = Name.begin(), *E = Name.end(); B < E; ++B) {
+    if (*B == '"') // Unquoted "
+      OS << "\\\"";
+    else if (*B != '\\') // Neither " or backslash
+      OS << *B;
+    else if (B + 1 == E) // Trailing backslash
+      OS << "\\\\";
+    else {
+      OS << B[0] << B[1]; // Quoted character
+      ++B;
+    }
+  }
+  OS << '"';
+}
+
+void MCSectionELF::PrintSwitchToSection(const MCAsmInfo &MAI, const Triple &T,
+                                        raw_ostream &OS,
+                                        const MCExpr *Subsection) const {
+  if (ShouldOmitSectionDirective(SectionName, MAI)) {
+    OS << '\t' << getSectionName();
+    if (Subsection) {
+      OS << '\t';
+      Subsection->print(OS, &MAI);
+    }
+    OS << '\n';
+    return;
+  }
+
+  OS << "\t.section\t";
+  printName(OS, getSectionName());
+
+  // Handle the weird solaris syntax if desired.
+  if (MAI.usesSunStyleELFSectionSwitchSyntax() &&
+      !(Flags & ELF::SHF_MERGE)) {
+    if (Flags & ELF::SHF_ALLOC)
+      OS << ",#alloc";
+    if (Flags & ELF::SHF_EXECINSTR)
+      OS << ",#execinstr";
+    if (Flags & ELF::SHF_WRITE)
+      OS << ",#write";
+    if (Flags & ELF::SHF_EXCLUDE)
+      OS << ",#exclude";
+    if (Flags & ELF::SHF_TLS)
+      OS << ",#tls";
+    OS << '\n';
+    return;
+  }
+
+  OS << ",\"";
+  if (Flags & ELF::SHF_ALLOC)
+    OS << 'a';
+  if (Flags & ELF::SHF_EXCLUDE)
+    OS << 'e';
+  if (Flags & ELF::SHF_EXECINSTR)
+    OS << 'x';
+  if (Flags & ELF::SHF_GROUP)
+    OS << 'G';
+  if (Flags & ELF::SHF_WRITE)
+    OS << 'w';
+  if (Flags & ELF::SHF_MERGE)
+    OS << 'M';
+  if (Flags & ELF::SHF_STRINGS)
+    OS << 'S';
+  if (Flags & ELF::SHF_TLS)
+    OS << 'T';
+  if (Flags & ELF::SHF_LINK_ORDER)
+    OS << 'o';
+
+  // If there are target-specific flags, print them.
+  Triple::ArchType Arch = T.getArch();
+  if (Arch == Triple::xcore) {
+    if (Flags & ELF::XCORE_SHF_CP_SECTION)
+      OS << 'c';
+    if (Flags & ELF::XCORE_SHF_DP_SECTION)
+      OS << 'd';
+  } else if (T.isARM() || T.isThumb()) {
+    if (Flags & ELF::SHF_ARM_PURECODE)
+      OS << 'y';
+  } else if (Arch == Triple::hexagon) {
+    if (Flags & ELF::SHF_HEX_GPREL)
+      OS << 's';
+  }
+
+  OS << '"';
+
+  OS << ',';
+
+  // If comment string is '@', e.g. as on ARM - use '%' instead
+  if (MAI.getCommentString()[0] == '@')
+    OS << '%';
+  else
+    OS << '@';
+
+  if (Type == ELF::SHT_INIT_ARRAY)
+    OS << "init_array";
+  else if (Type == ELF::SHT_FINI_ARRAY)
+    OS << "fini_array";
+  else if (Type == ELF::SHT_PREINIT_ARRAY)
+    OS << "preinit_array";
+  else if (Type == ELF::SHT_NOBITS)
+    OS << "nobits";
+  else if (Type == ELF::SHT_NOTE)
+    OS << "note";
+  else if (Type == ELF::SHT_PROGBITS)
+    OS << "progbits";
+  else if (Type == ELF::SHT_X86_64_UNWIND)
+    OS << "unwind";
+  else if (Type == ELF::SHT_MIPS_DWARF)
+    // Print hex value of the flag while we do not have
+    // any standard symbolic representation of the flag.
+    OS << "0x7000001e";
+  else if (Type == ELF::SHT_LLVM_ODRTAB)
+    OS << "llvm_odrtab";
+  else if (Type == ELF::SHT_LLVM_LINKER_OPTIONS)
+    OS << "llvm_linker_options";
+  else if (Type == ELF::SHT_LLVM_CALL_GRAPH_PROFILE)
+    OS << "llvm_call_graph_profile";
+  else
+    report_fatal_error("unsupported type 0x" + Twine::utohexstr(Type) +
+                       " for section " + getSectionName());
+
+  if (EntrySize) {
+    assert(Flags & ELF::SHF_MERGE);
+    OS << "," << EntrySize;
+  }
+
+  if (Flags & ELF::SHF_GROUP) {
+    OS << ",";
+    printName(OS, Group->getName());
+    OS << ",comdat";
+  }
+
+  if (Flags & ELF::SHF_LINK_ORDER) {
+    assert(AssociatedSymbol);
+    OS << ",";
+    printName(OS, AssociatedSymbol->getName());
+  }
+
+  if (isUnique())
+    OS << ",unique," << UniqueID;
+
+  OS << '\n';
+
+  if (Subsection) {
+    OS << "\t.subsection\t";
+    Subsection->print(OS, &MAI);
+    OS << '\n';
+  }
+}
+
+bool MCSectionELF::UseCodeAlign() const {
+  return getFlags() & ELF::SHF_EXECINSTR;
+}
+
+bool MCSectionELF::isVirtualSection() const {
+  return getType() == ELF::SHT_NOBITS;
+}