DebugInfo: Emit DW_TAG_subprogram's DW_AT_high_pc as an offset from the low_pc

[oota-llvm.git] / lib / MC / MCObjectFileInfo.cpp

diff --git a/lib/MC/MCObjectFileInfo.cpp b/lib/MC/MCObjectFileInfo.cpp
index 6d3c4d1f928245c0cdfeb1a1b3891102ff5eefca..4211b179dce489a9bd1321f7e949ccda6f2fc54a 100644 (file)
--- a/lib/MC/MCObjectFileInfo.cpp
+++ b/lib/MC/MCObjectFileInfo.cpp
@@ -8,6 +8,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/MC/MCObjectFileInfo.h"
+#include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/Triple.h"
 #include "llvm/MC/MCContext.h"
 #include "llvm/MC/MCSection.h"
@@ -39,6 +40,9 @@ void MCObjectFileInfo::InitMachOMCObjectFileInfo(Triple T) {
     = Ctx->getMachOSection("__DATA", "__data", 0,
                            SectionKind::getDataRel());
 
+  // BSSSection might not be expected initialized on msvc.
+  BSSSection = 0;
+
   TLSDataSection // .tdata
     = Ctx->getMachOSection("__DATA", "__thread_data",
                            MCSectionMachO::S_THREAD_LOCAL_REGULAR,
@@ -75,16 +79,10 @@ void MCObjectFileInfo::InitMachOMCObjectFileInfo(Triple T) {
                            MCSectionMachO::S_8BYTE_LITERALS,
                            SectionKind::getMergeableConst8());
 
-  // ld_classic doesn't support .literal16 in 32-bit mode, and ld64 falls back
-  // to using it in -static mode.
-  SixteenByteConstantSection = 0;
-  if (RelocM != Reloc::Static &&
-      T.getArch() != Triple::x86_64 && T.getArch() != Triple::ppc64 &&
-      T.getArch() != Triple::ppc64le)
-    SixteenByteConstantSection =   // .literal16
-      Ctx->getMachOSection("__TEXT", "__literal16",
-                           MCSectionMachO::S_16BYTE_LITERALS,
-                           SectionKind::getMergeableConst16());
+  SixteenByteConstantSection // .literal16
+      = Ctx->getMachOSection("__TEXT", "__literal16",
+                             MCSectionMachO::S_16BYTE_LITERALS,
+                             SectionKind::getMergeableConst16());
 
   ReadOnlySection  // .const
     = Ctx->getMachOSection("__TEXT", "__const", 0,
@@ -146,6 +144,8 @@ void MCObjectFileInfo::InitMachOMCObjectFileInfo(Triple T) {
   LSDASection = Ctx->getMachOSection("__TEXT", "__gcc_except_tab", 0,
                                      SectionKind::getReadOnlyWithRel());
 
+  COFFDebugSymbolsSection = 0;
+
   if (T.isMacOSX() && !T.isMacOSXVersionLT(10, 6)) {
     CompactUnwindSection =
       Ctx->getMachOSection("__LD", "__compact_unwind",
@@ -231,6 +231,9 @@ void MCObjectFileInfo::InitMachOMCObjectFileInfo(Triple T) {
     Ctx->getMachOSection("__DWARF", "__debug_inlined",
                          MCSectionMachO::S_ATTR_DEBUG,
                          SectionKind::getMetadata());
+  StackMapSection =
+    Ctx->getMachOSection("__LLVM_STACKMAPS", "__llvm_stackmaps", 0,
+                         SectionKind::getMetadata());
 
   TLSExtraDataSection = TLSTLVSection;
 }
@@ -304,6 +307,33 @@ void MCObjectFileInfo::InitELFMCObjectFileInfo(Triple T) {
     FDEEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_udata8;
     TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
       dwarf::DW_EH_PE_udata8;
+  } else if (T.getArch() == Triple::sparc) {
+    if (RelocM == Reloc::PIC_) {
+      LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
+      PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
+        dwarf::DW_EH_PE_sdata4;
+      FDEEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
+      TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
+        dwarf::DW_EH_PE_sdata4;
+    } else {
+      LSDAEncoding = dwarf::DW_EH_PE_absptr;
+      PersonalityEncoding = dwarf::DW_EH_PE_absptr;
+      FDEEncoding = dwarf::DW_EH_PE_udata4;
+      TTypeEncoding = dwarf::DW_EH_PE_absptr;
+    }
+  } else if (T.getArch() == Triple::sparcv9) {
+    LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
+    if (RelocM == Reloc::PIC_) {
+      PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
+        dwarf::DW_EH_PE_sdata4;
+      FDEEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
+      TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
+        dwarf::DW_EH_PE_sdata4;
+    } else {
+      PersonalityEncoding = dwarf::DW_EH_PE_absptr;
+      FDEEncoding = dwarf::DW_EH_PE_udata4;
+      TTypeEncoding = dwarf::DW_EH_PE_absptr;
+    }
   } else if (T.getArch() == Triple::systemz) {
     // All currently-defined code models guarantee that 4-byte PC-relative
     // values will be in range.
@@ -424,6 +454,8 @@ void MCObjectFileInfo::InitELFMCObjectFileInfo(Triple T) {
                        ELF::SHF_ALLOC,
                        SectionKind::getReadOnly());
 
+  COFFDebugSymbolsSection = 0;
+
   // Debug Info Sections.
   DwarfAbbrevSection =
     Ctx->getELFSection(".debug_abbrev", ELF::SHT_PROGBITS, 0,
@@ -575,6 +607,13 @@ void MCObjectFileInfo::InitCOFFMCObjectFileInfo(Triple T) {
                         SectionKind::getReadOnly());
 
   // Debug info.
+  COFFDebugSymbolsSection =
+    Ctx->getCOFFSection(".debug$S",
+                        COFF::IMAGE_SCN_MEM_DISCARDABLE |
+                        COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+                        COFF::IMAGE_SCN_MEM_READ,
+                        SectionKind::getMetadata());
+
   DwarfAbbrevSection =
     Ctx->getCOFFSection(".debug_abbrev",
                         COFF::IMAGE_SCN_MEM_DISCARDABLE |
@@ -605,12 +644,12 @@ void MCObjectFileInfo::InitCOFFMCObjectFileInfo(Triple T) {
                         COFF::IMAGE_SCN_MEM_DISCARDABLE |
                         COFF::IMAGE_SCN_MEM_READ,
                         SectionKind::getMetadata());
-  DwarfPubNamesSection =
+  DwarfGnuPubNamesSection =
     Ctx->getCOFFSection(".debug_gnu_pubnames",
                         COFF::IMAGE_SCN_MEM_DISCARDABLE |
                         COFF::IMAGE_SCN_MEM_READ,
                         SectionKind::getMetadata());
-  DwarfPubTypesSection =
+  DwarfGnuPubTypesSection =
     Ctx->getCOFFSection(".debug_gnu_pubtypes",
                         COFF::IMAGE_SCN_MEM_DISCARDABLE |
                         COFF::IMAGE_SCN_MEM_READ,
@@ -697,13 +736,11 @@ void MCObjectFileInfo::InitMCObjectFileInfo(StringRef TT, Reloc::Model relocm,
        Arch == Triple::arm || Arch == Triple::thumb ||
        Arch == Triple::ppc || Arch == Triple::ppc64 ||
        Arch == Triple::UnknownArch) &&
-      (T.isOSDarwin() || T.getEnvironment() == Triple::MachO)) {
+      (T.isOSDarwin() || T.isOSBinFormatMachO())) {
     Env = IsMachO;
     InitMachOMCObjectFileInfo(T);
   } else if ((Arch == Triple::x86 || Arch == Triple::x86_64) &&
-             (T.getEnvironment() != Triple::ELF) &&
-             (T.getOS() == Triple::MinGW32 || T.getOS() == Triple::Cygwin ||
-              T.getOS() == Triple::Win32)) {
+             T.getObjectFormat() != Triple::ELF && T.isOSWindows()) {
     Env = IsCOFF;
     InitCOFFMCObjectFileInfo(T);
   } else {
@@ -712,6 +749,18 @@ void MCObjectFileInfo::InitMCObjectFileInfo(StringRef TT, Reloc::Model relocm,
   }
 }
 
+const MCSection *MCObjectFileInfo::getDwarfTypesSection(uint64_t Hash) const {
+  return Ctx->getELFSection(".debug_types", ELF::SHT_PROGBITS, ELF::SHF_GROUP,
+                            SectionKind::getMetadata(), 0, utostr(Hash));
+}
+
+const MCSection *
+MCObjectFileInfo::getDwarfTypesDWOSection(uint64_t Hash) const {
+  return Ctx->getELFSection(".debug_types.dwo", ELF::SHT_PROGBITS,
+                            ELF::SHF_GROUP, SectionKind::getMetadata(), 0,
+                            utostr(Hash));
+}
+
 void MCObjectFileInfo::InitEHFrameSection() {
   if (Env == IsMachO)
     EHFrameSection =