llvm-objdump/COFF: Print load configuration table.

Load Configuration Table may contain a pointer to SEH table. This patch is to
print the offset to the table. Printing SEH table contents is a TODO.

The layout of Layout Configuration Table is described in Microsoft PE/COFF
Object File Format Spec, but the table's offset/size descriptions seems to be
totally wrong, at least in revision 8.3 of the spec. I believe the table in
this patch is the correct one.

llvm-svn: 201638

1 files changed, 41 insertions, 0 deletions

diff --git a/llvm/tools/llvm-objdump/COFFDump.cpp b/llvm/tools/llvm-objdump/COFFDump.cpp
index f6f0f15197b..883786d4f66 100644
--- a/llvm/tools/llvm-objdump/COFFDump.cpp
+++ b/llvm/tools/llvm-objdump/COFFDump.cpp
@@ -233,6 +233,46 @@ static void printCOFFSymbolAddress(llvm::raw_ostream &Out,
     Out << format(" + 0x%04x", Disp);
 }
 
+static void printLoadConfiguration(const COFFObjectFile *Obj) {
+  const coff_file_header *Header;
+  if (error(Obj->getCOFFHeader(Header)))
+    return;
+  // Currently only x86 is supported
+  if (Header->Machine != COFF::IMAGE_FILE_MACHINE_I386)
+    return;
+
+  const data_directory *DataDir;
+  if (error(Obj->getDataDirectory(COFF::LOAD_CONFIG_TABLE, DataDir)))
+    return;
+  uintptr_t IntPtr = 0;
+  if (DataDir->RelativeVirtualAddress == 0)
+    return;
+  if (error(Obj->getRvaPtr(DataDir->RelativeVirtualAddress, IntPtr)))
+    return;
+  const coff_load_configuration32 *LoadConf =
+      reinterpret_cast<const coff_load_configuration32 *>(IntPtr);
+
+  outs() << "Load configuration:"
+         << "\n  Timestamp: " << LoadConf->TimeDateStamp
+         << "\n  Major Version: " << LoadConf->MajorVersion
+         << "\n  Minor Version: " << LoadConf->MinorVersion
+         << "\n  GlobalFlags Clear: " << LoadConf->GlobalFlagsClear
+         << "\n  GlobalFlags Set: " << LoadConf->GlobalFlagsSet
+         << "\n  Critical Section Default Timeout: " << LoadConf->CriticalSectionDefaultTimeout
+         << "\n  Decommit Free Block Threshold: " << LoadConf->DeCommitFreeBlockThreshold
+         << "\n  Decommit Total Free Threshold: " << LoadConf->DeCommitTotalFreeThreshold
+         << "\n  Lock Prefix Table: " << LoadConf->LockPrefixTable
+         << "\n  Maximum Allocation Size: " << LoadConf->MaximumAllocationSize
+         << "\n  Virtual Memory Threshold: " << LoadConf->VirtualMemoryThreshold
+         << "\n  Process Affinity Mask: " << LoadConf->ProcessAffinityMask
+         << "\n  Process Heap Flags: " << LoadConf->ProcessHeapFlags
+         << "\n  CSD Version: " << LoadConf->CSDVersion
+         << "\n  Security Cookie: " << LoadConf->SecurityCookie
+         << "\n  SEH Table: " << LoadConf->SEHandlerTable
+         << "\n  SEH Count: " << LoadConf->SEHandlerCount
+         << "\n\n";
+}
+
 // Prints import tables. The import table is a table containing the list of
 // DLL name and symbol names which will be linked by the loader.
 static void printImportTables(const COFFObjectFile *Obj) {
@@ -431,6 +471,7 @@ void llvm::printCOFFUnwindInfo(const COFFObjectFile *Obj) {
 
 void llvm::printCOFFFileHeader(const object::ObjectFile *Obj) {
   const COFFObjectFile *file = dyn_cast<const COFFObjectFile>(Obj);
+  printLoadConfiguration(file);
   printImportTables(file);
   printExportTable(file);
 }