[llvm-objdump][XCOFF] Enable the -l (--line-numbers) option.

Summary: Add support for dumping line number
information for XCOFF object files in llvm-objdump.

Reviewed By: jhenderson

Differential Revision: https://reviews.llvm.org/D101272

include/llvm/Object/XCOFFObjectFile.h

@@ -370,7 +370,7 @@ public:
   const void *getPointerToSymbolTable() const { return SymbolTblPtr; }
 
   Expected<StringRef> getSymbolSectionName(XCOFFSymbolRef Ref) const;
-
+  unsigned getSymbolSectionID(SymbolRef Sym) const;
   XCOFFSymbolRef toSymbolRef(DataRefImpl Ref) const;
 
   // File header related interfaces.

lib/Object/SymbolSize.cpp

@@ -12,6 +12,7 @@
 #include "llvm/Object/ELFObjectFile.h"
 #include "llvm/Object/MachO.h"
 #include "llvm/Object/Wasm.h"
+#include "llvm/Object/XCOFFObjectFile.h"
 
 using namespace llvm;
 using namespace object;
@@ -30,7 +31,8 @@ static unsigned getSectionID(const ObjectFile &O, SectionRef Sec) {
     return M->getSectionID(Sec);
   if (isa<WasmObjectFile>(&O))
     return Sec.getIndex();
-
+  if (isa<XCOFFObjectFile>(&O))
+    return Sec.getIndex();
   return cast<COFFObjectFile>(O).getSectionID(Sec);
 }
 
@@ -39,6 +41,8 @@ static unsigned getSymbolSectionID(const ObjectFile &O, SymbolRef Sym) {
     return M->getSymbolSectionID(Sym);
   if (const auto *M = dyn_cast<WasmObjectFile>(&O))
     return M->getSymbolSectionId(Sym);
+  if (const auto *M = dyn_cast<XCOFFObjectFile>(&O))
+    return M->getSymbolSectionID(Sym);
   return cast<COFFObjectFile>(O).getSymbolSectionID(Sym);
 }
 

lib/Object/XCOFFObjectFile.cpp

@@ -214,7 +214,7 @@ uint64_t XCOFFObjectFile::getCommonSymbolSizeImpl(DataRefImpl Symb) const {
 
 Expected<SymbolRef::Type>
 XCOFFObjectFile::getSymbolType(DataRefImpl Symb) const {
-  llvm_unreachable("Not yet implemented!");
+  // TODO: Return the correct symbol type.
   return SymbolRef::ST_Other;
 }
 
@@ -394,7 +394,7 @@ void XCOFFObjectFile::getRelocationTypeName(
 
 Expected<uint32_t> XCOFFObjectFile::getSymbolFlags(DataRefImpl Symb) const {
   uint32_t Result = 0;
-  llvm_unreachable("Not yet implemented!");
+  // TODO: Return correct symbol flags.
   return Result;
 }
 
@@ -513,6 +513,11 @@ XCOFFObjectFile::getSymbolSectionName(XCOFFSymbolRef SymEntPtr) const {
   }
 }
 
+unsigned XCOFFObjectFile::getSymbolSectionID(SymbolRef Sym) const {
+  XCOFFSymbolRef XCOFFSymRef(Sym.getRawDataRefImpl(), this);
+  return XCOFFSymRef.getSectionNumber();
+}
+
 bool XCOFFObjectFile::isReservedSectionNumber(int16_t SectionNumber) {
   return (SectionNumber <= 0 && SectionNumber >= -2);
 }

test/tools/llvm-objdump/XCOFF/disassemble-all.test

@@ -1,5 +1,3 @@
-# REQUIRES: powerpc-registered-target
-
 # RUN: llvm-objdump -D %p/Inputs/xcoff-section-headers.o | \
 # RUN:   FileCheck %s
 

test/tools/llvm-objdump/XCOFF/disassemble-symbol-description.test

@@ -1,5 +1,3 @@
-# REQUIRES: powerpc-registered-target
-
 # RUN: llvm-objdump -D %p/Inputs/xcoff-section-headers.o | \
 # RUN:   FileCheck --check-prefixes=COMMON,PLAIN %s
 

test/tools/llvm-objdump/XCOFF/lit.local.cfg

@@ -0,0 +1,2 @@
+if not 'PowerPC' in config.root.targets:
+    config.unsupported = True

test/tools/llvm-objdump/XCOFF/print-linenumber.test

@@ -0,0 +1,50 @@
+# Test that the `llvm-objdump -l` can print correct line numbers.
+
+# RUN: llvm-objdump -d -l %p/Inputs/basic32.o | FileCheck %s --check-prefix=LINES32
+# RUN: llvm-objdump -d -l %p/Inputs/basic64.o | FileCheck %s --check-prefix=LINES64
+
+## basic32.o Compiled with IBM XL C/C++ for AIX, V16.1.1.0
+## Compiler command: xlc basic.c -c -qdbgfmt=dwarf -g -q32 -o basic32.o
+##
+## basic64.o Compiled with IBM XL C/C++ for AIX, V16.1.1.0
+## Compiler command: xlc basic.c -c -qdbgfmt=dwarf -g -q64 -o basic64.o
+##
+## basic.c:
+## int main(void)
+## {
+##   return 0;
+## }
+
+# LINES32:       Inputs/basic32.o:	file format aixcoff-rs6000
+# LINES32:       Disassembly of section .text:
+# LINES32:       00000000 <.text>:
+# LINES32:       ; main():
+# LINES32-NEXT:  ; /basic.c:1
+# LINES32-NEXT:         0: 38 60 00 00  	li 3, 0
+# LINES32-NEXT:  ; /basic.c:3
+# LINES32-NEXT:         4: 48 00 00 04  	b 0x8
+# LINES32-NEXT:  ; /basic.c:4
+# LINES32-NEXT:         8: 4e 80 00 20  	blr
+# LINES32-NEXT:         c: 00 00 00 00  	<unknown>
+# LINES32-NEXT:        10: 00 00 20 40  	<unknown>
+# LINES32-NEXT:        14: 00 00 00 01  	<unknown>
+# LINES32-NEXT:        18: 00 00 00 0c  	<unknown>
+# LINES32-NEXT:        1c: 00 04 6d 61  	<unknown>
+# LINES32-NEXT:        20: 69 6e 00 00  	xori 14, 11, 0
+
+# LINES64:       Inputs/basic64.o:	file format aix5coff64-rs6000
+# LINES64:       Disassembly of section .text:
+# LINES64:       0000000000000000 <.main>:
+# LINES64:       ; main():
+# LINES64-NEXT:  ; /basic.c:1
+# LINES64-NEXT:         0: 38 60 00 00  	li 3, 0
+# LINES64-NEXT:  ; /basic.c:3
+# LINES64-NEXT:         4: 48 00 00 04  	b 0x8
+# LINES64-NEXT:  ; /basic.c:4
+# LINES64-NEXT:         8: 4e 80 00 20  	blr
+# LINES64-NEXT:         c: 00 00 00 00  	<unknown>
+# LINES64-NEXT:        10: 00 00 20 40  	<unknown>
+# LINES64-NEXT:        14: 00 00 00 01  	<unknown>
+# LINES64-NEXT:        18: 00 00 00 0c  	<unknown>
+# LINES64-NEXT:        1c: 00 04 6d 61  	<unknown>
+# LINES64-NEXT:        20: 69 6e 00 00  	xori 14, 11, 0

test/tools/llvm-objdump/XCOFF/print-reloc.test

@@ -1,5 +1,3 @@
-# REQUIRES: powerpc-registered-target
-
 # RUN: llvm-objdump -r %p/Inputs/xcoff-section-headers.o | \
 # RUN:   FileCheck --match-full-lines --strict-whitespace %s