ELF: Add support for the exclude section bit for gas compat.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190769 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 12 insertions, 5 deletions

diff --git a/lib/MC/MCParser/ELFAsmParser.cpp b/lib/MC/MCParser/ELFAsmParser.cpp
index 67b0e5d..7b8a2d0 100644
--- a/lib/MC/MCParser/ELFAsmParser.cpp
+++ b/lib/MC/MCParser/ELFAsmParser.cpp
@@ -279,14 +279,17 @@ static SectionKind computeSectionKind(unsigned Flags) {
   return SectionKind::getDataRel();
 }
 
-static int parseSectionFlags(StringRef flagsStr, bool *UseLastGroup) {
-  int flags = 0;
+static unsigned parseSectionFlags(StringRef flagsStr, bool *UseLastGroup) {
+  unsigned flags = 0;
 
   for (unsigned i = 0; i < flagsStr.size(); i++) {
     switch (flagsStr[i]) {
     case 'a':
       flags |= ELF::SHF_ALLOC;
       break;
+    case 'e':
+      flags |= ELF::SHF_EXCLUDE;
+      break;
     case 'x':
       flags |= ELF::SHF_EXECINSTR;
       break;
@@ -315,7 +318,7 @@ static int parseSectionFlags(StringRef flagsStr, bool *UseLastGroup) {
       *UseLastGroup = true;
       break;
     default:
-      return -1;
+      return -1U;
     }
   }
 
@@ -381,8 +384,8 @@ bool ELFAsmParser::ParseSectionArguments(bool IsPush) {
     StringRef FlagsStr = getTok().getStringContents();
     Lex();
 
-    int extraFlags = parseSectionFlags(FlagsStr, &UseLastGroup);
-    if (extraFlags < 0)
+    unsigned extraFlags = parseSectionFlags(FlagsStr, &UseLastGroup);
+    if (extraFlags == -1U)
       return TokError("unknown flag");
     Flags |= extraFlags;
 
diff --git a/lib/MC/MCSectionELF.cpp b/lib/MC/MCSectionELF.cpp
index bf1a984..ff9c4d3 100644
--- a/lib/MC/MCSectionELF.cpp
+++ b/lib/MC/MCSectionELF.cpp
@@ -75,6 +75,8 @@ void MCSectionELF::PrintSwitchToSection(const MCAsmInfo &MAI,
       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';
@@ -84,6 +86,8 @@ void MCSectionELF::PrintSwitchToSection(const MCAsmInfo &MAI,
   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)