[llvm-objdump] Add -D and --disassemble-all flags that attempt disassembly on all sections instead of just text sections.

llvm-svn: 243041

3 files changed, 19 insertions, 3 deletions

diff --git a/llvm/test/tools/llvm-objdump/disassemble-data.test b/llvm/test/tools/llvm-objdump/disassemble-data.test
new file mode 100644
index 00000000000..97f11c12f53
--- /dev/null
+++ b/llvm/test/tools/llvm-objdump/disassemble-data.test
@@ -0,0 +1,6 @@
+// This test checks that -D disassembles from a data section
+// RUN: llvm-mc -filetype=obj -o - %s | llvm-objdump -D - | FileCheck %s
+
+// CHECK: Disassembly of section .data:
+.data
+.word 0x0
\ No newline at end of file
diff --git a/llvm/tools/llvm-objdump/llvm-objdump.cpp b/llvm/tools/llvm-objdump/llvm-objdump.cpp
index 275eb9c6a45..91626c15d87 100644
--- a/llvm/tools/llvm-objdump/llvm-objdump.cpp
+++ b/llvm/tools/llvm-objdump/llvm-objdump.cpp
@@ -70,7 +70,14 @@ llvm::Disassemble("disassemble",
   cl::desc("Display assembler mnemonics for the machine instructions"));
 static cl::alias
 Disassembled("d", cl::desc("Alias for --disassemble"),
-             cl::aliasopt(Disassemble));
+             cl::aliasopt(Disassemble));

+

+cl::opt<bool>

+llvm::DisassembleAll("disassemble-all",

+  cl::desc("Display assembler mnemonics for the machine instructions"));

+static cl::alias

+DisassembleAlld("D", cl::desc("Alias for --disassemble-all"),

+             cl::aliasopt(DisassembleAll));
 
 cl::opt<bool>
 llvm::Relocations("r", cl::desc("Display the relocation entries in the file"));
@@ -837,7 +844,7 @@ static void DisassembleObject(const ObjectFile *Obj, bool InlineRelocs) {
   }
 
   for (const SectionRef &Section : Obj->sections()) {
-    if (!Section.isText() || Section.isVirtual())
+    if (!DisassembleAll && (!Section.isText() || Section.isVirtual()))
       continue;
 
     uint64_t SectionAddr = Section.getAddress();
@@ -1514,6 +1521,8 @@ int main(int argc, char **argv) {
   if (InputFilenames.size() == 0)
     InputFilenames.push_back("a.out");
 
+  if (DisassembleAll)
+    Disassemble = true;
   if (!Disassemble
       && !Relocations
       && !SectionHeaders
diff --git a/llvm/tools/llvm-objdump/llvm-objdump.h b/llvm/tools/llvm-objdump/llvm-objdump.h
index eb10d8344f7..0fa2d29f547 100644
--- a/llvm/tools/llvm-objdump/llvm-objdump.h
+++ b/llvm/tools/llvm-objdump/llvm-objdump.h
@@ -26,7 +26,8 @@ extern cl::opt<std::string> ArchName;
 extern cl::opt<std::string> MCPU;
 extern cl::list<std::string> MAttrs;
 extern cl::list<std::string> DumpSections;
-extern cl::opt<bool> Disassemble;
+extern cl::opt<bool> Disassemble;

+extern cl::opt<bool> DisassembleAll;
 extern cl::opt<bool> NoShowRawInsn;
 extern cl::opt<bool> PrivateHeaders;
 extern cl::opt<bool> ExportsTrie;