[llvm-readobj] Print values of FLAGS and MIPS_FLAGS dynamic table tags

in a human readable form.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208489 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Support/ELF.h

@@ -1666,6 +1666,7 @@ enum {
   DT_LOPROC       = 0x70000000, // Start of processor specific tags.
   DT_HIPROC       = 0x7FFFFFFF, // End of processor specific tags.
 
+  DT_GNU_HASH     = 0x6FFFFEF5, // Reference to the GNU hash table.
   DT_RELACOUNT    = 0x6FFFFFF9, // ELF32_Rela count.
   DT_RELCOUNT     = 0x6FFFFFFA, // ELF32_Rel count.
 

test/tools/llvm-readobj/dynamic.test

@@ -21,7 +21,7 @@ ELF-MIPS:   0x00000011 REL                  0x518
 ELF-MIPS:   0x00000012 RELSZ                16 (bytes)
 ELF-MIPS:   0x00000013 RELENT               8 (bytes)
 ELF-MIPS:   0x70000001 MIPS_RLD_VERSION     1
-ELF-MIPS:   0x70000005 MIPS_FLAGS           0x2
+ELF-MIPS:   0x70000005 MIPS_FLAGS           NOTPOT
 ELF-MIPS:   0x70000006 MIPS_BASE_ADDRESS    0x0
 ELF-MIPS:   0x7000000A MIPS_LOCAL_GOTNO     10
 ELF-MIPS:   0x70000011 MIPS_SYMTABNO        19
@@ -55,7 +55,7 @@ ELF-MIPS-EXE:   0x70000016 MIPS_RLD_MAP         0x410880
 ELF-MIPS-EXE:   0x00000015 DEBUG                0x0
 ELF-MIPS-EXE:   0x00000003 PLTGOT               0x410890
 ELF-MIPS-EXE:   0x70000001 MIPS_RLD_VERSION     1
-ELF-MIPS-EXE:   0x70000005 MIPS_FLAGS           0x2
+ELF-MIPS-EXE:   0x70000005 MIPS_FLAGS           NOTPOT
 ELF-MIPS-EXE:   0x70000006 MIPS_BASE_ADDRESS    0x400000
 ELF-MIPS-EXE:   0x7000000A MIPS_LOCAL_GOTNO     5
 ELF-MIPS-EXE:   0x70000011 MIPS_SYMTABNO        8
@@ -70,3 +70,44 @@ ELF-MIPS-EXE:   0x6FFFFFFF VERNEEDNUM           1
 ELF-MIPS-EXE:   0x6FFFFFF0 VERSYM               0x4003D8
 ELF-MIPS-EXE:   0x00000000 NULL                 0x0
 ELF-MIPS-EXE: ]
+
+RUN: llvm-readobj -dynamic-table %p/Inputs/dynamic-table-exe.x86 \
+RUN:     | FileCheck %s -check-prefix ELF-X86-EXE
+
+ELF-X86-EXE: Format: ELF32-i386
+ELF-X86-EXE: Arch: i386
+ELF-X86-EXE: AddressSize: 32bit
+ELF-X86-EXE: LoadName:
+ELF-X86-EXE: DynamicSection [ (30 entries)
+ELF-X86-EXE:   Tag        Type                 Name/Value
+ELF-X86-EXE:   0x00000001 NEEDED               SharedLibrary (libstdc++.so.6)
+ELF-X86-EXE:   0x00000001 NEEDED               SharedLibrary (libgcc_s.so.1)
+ELF-X86-EXE:   0x00000001 NEEDED               SharedLibrary (libc.so.6)
+ELF-X86-EXE:   0x0000000C INIT                 0x62C
+ELF-X86-EXE:   0x0000000D FINI                 0x920
+ELF-X86-EXE:   0x00000019 INIT_ARRAY           0x19FC
+ELF-X86-EXE:   0x0000001B INIT_ARRAYSZ         4 (bytes)
+ELF-X86-EXE:   0x0000001A FINI_ARRAY           0x1A00
+ELF-X86-EXE:   0x0000001C FINI_ARRAYSZ         4 (bytes)
+ELF-X86-EXE:   0x00000004 HASH                 0x18C
+ELF-X86-EXE:   0x6FFFFEF5 GNU_HASH             0x1E4
+ELF-X86-EXE:   0x00000005 STRTAB               0x328
+ELF-X86-EXE:   0x00000006 SYMTAB               0x218
+ELF-X86-EXE:   0x0000000A STRSZ                408 (bytes)
+ELF-X86-EXE:   0x0000000B SYMENT               16 (bytes)
+ELF-X86-EXE:   0x00000015 DEBUG                0x0
+ELF-X86-EXE:   0x00000003 PLTGOT               0x1B30
+ELF-X86-EXE:   0x00000002 PLTRELSZ             64 (bytes)
+ELF-X86-EXE:   0x00000014 PLTREL               REL
+ELF-X86-EXE:   0x00000017 JMPREL               0x5EC
+ELF-X86-EXE:   0x00000011 REL                  0x564
+ELF-X86-EXE:   0x00000012 RELSZ                136 (bytes)
+ELF-X86-EXE:   0x00000013 RELENT               8 (bytes)
+ELF-X86-EXE:   0x00000016 TEXTREL
+ELF-X86-EXE:   0x0000001E FLAGS                TEXTREL
+ELF-X86-EXE:   0x6FFFFFFE VERNEED              0x4E4
+ELF-X86-EXE:   0x6FFFFFFF VERNEEDNUM           3
+ELF-X86-EXE:   0x6FFFFFF0 VERSYM               0x4C0
+ELF-X86-EXE:   0x6FFFFFFA RELCOUNT             6
+ELF-X86-EXE:   0x00000000 NULL                 0x0
+ELF-X86-EXE: ]

tools/llvm-readobj/ELFDumper.cpp

@@ -738,6 +738,8 @@ static const char *getTypeString(uint64_t Type) {
   LLVM_READOBJ_TYPE_CASE(VERNEED);
   LLVM_READOBJ_TYPE_CASE(VERNEEDNUM);
   LLVM_READOBJ_TYPE_CASE(VERSYM);
+  LLVM_READOBJ_TYPE_CASE(RELCOUNT);
+  LLVM_READOBJ_TYPE_CASE(GNU_HASH);
   LLVM_READOBJ_TYPE_CASE(MIPS_RLD_VERSION);
   LLVM_READOBJ_TYPE_CASE(MIPS_FLAGS);
   LLVM_READOBJ_TYPE_CASE(MIPS_BASE_ADDRESS);
@@ -753,6 +755,57 @@ static const char *getTypeString(uint64_t Type) {
 
 #undef LLVM_READOBJ_TYPE_CASE
 
+#define LLVM_READOBJ_DT_FLAG_ENT(prefix, enum) \
+  { #enum, prefix##_##enum }
+
+static const EnumEntry<unsigned> ElfDynamicDTFlags[] = {
+  LLVM_READOBJ_DT_FLAG_ENT(DF, ORIGIN),
+  LLVM_READOBJ_DT_FLAG_ENT(DF, SYMBOLIC),
+  LLVM_READOBJ_DT_FLAG_ENT(DF, TEXTREL),
+  LLVM_READOBJ_DT_FLAG_ENT(DF, BIND_NOW),
+  LLVM_READOBJ_DT_FLAG_ENT(DF, STATIC_TLS)
+};
+
+static const EnumEntry<unsigned> ElfDynamicDTMipsFlags[] = {
+  LLVM_READOBJ_DT_FLAG_ENT(RHF, NONE),
+  LLVM_READOBJ_DT_FLAG_ENT(RHF, QUICKSTART),
+  LLVM_READOBJ_DT_FLAG_ENT(RHF, NOTPOT),
+  LLVM_READOBJ_DT_FLAG_ENT(RHS, NO_LIBRARY_REPLACEMENT),
+  LLVM_READOBJ_DT_FLAG_ENT(RHF, NO_MOVE),
+  LLVM_READOBJ_DT_FLAG_ENT(RHF, SGI_ONLY),
+  LLVM_READOBJ_DT_FLAG_ENT(RHF, GUARANTEE_INIT),
+  LLVM_READOBJ_DT_FLAG_ENT(RHF, DELTA_C_PLUS_PLUS),
+  LLVM_READOBJ_DT_FLAG_ENT(RHF, GUARANTEE_START_INIT),
+  LLVM_READOBJ_DT_FLAG_ENT(RHF, PIXIE),
+  LLVM_READOBJ_DT_FLAG_ENT(RHF, DEFAULT_DELAY_LOAD),
+  LLVM_READOBJ_DT_FLAG_ENT(RHF, REQUICKSTART),
+  LLVM_READOBJ_DT_FLAG_ENT(RHF, REQUICKSTARTED),
+  LLVM_READOBJ_DT_FLAG_ENT(RHF, CORD),
+  LLVM_READOBJ_DT_FLAG_ENT(RHF, NO_UNRES_UNDEF),
+  LLVM_READOBJ_DT_FLAG_ENT(RHF, RLD_ORDER_SAFE)
+};
+
+#undef LLVM_READOBJ_DT_FLAG_ENT
+
+template <typename T, typename TFlag>
+void printFlags(T Value, ArrayRef<EnumEntry<TFlag>> Flags, raw_ostream &OS) {
+  typedef EnumEntry<TFlag> FlagEntry;
+  typedef SmallVector<FlagEntry, 10> FlagVector;
+  FlagVector SetFlags;
+
+  for (const auto &Flag : Flags) {
+    if (Flag.Value == 0)
+      continue;
+
+    if ((Value & Flag.Value) == Flag.Value)
+      SetFlags.push_back(Flag);
+  }
+
+  for (const auto &Flag : SetFlags) {
+    OS << Flag.Name << " ";
+  }
+}
+
 template <class ELFT>
 static void printValue(const ELFFile<ELFT> *O, uint64_t Type, uint64_t Value,
                        bool Is64, raw_ostream &OS) {
@@ -781,14 +834,15 @@ static void printValue(const ELFFile<ELFT> *O, uint64_t Type, uint64_t Value,
   case DT_DEBUG:
   case DT_VERNEED:
   case DT_VERSYM:
+  case DT_GNU_HASH:
   case DT_NULL:
-  case DT_MIPS_FLAGS:
   case DT_MIPS_BASE_ADDRESS:
   case DT_MIPS_GOTSYM:
   case DT_MIPS_RLD_MAP:
   case DT_MIPS_PLTGOT:
     OS << format("0x%" PRIX64, Value);
     break;
+  case DT_RELCOUNT:
   case DT_VERNEEDNUM:
   case DT_MIPS_RLD_VERSION:
   case DT_MIPS_LOCAL_GOTNO:
@@ -818,6 +872,12 @@ static void printValue(const ELFFile<ELFT> *O, uint64_t Type, uint64_t Value,
   case DT_RUNPATH:
     OS << O->getDynamicString(Value);
     break;
+  case DT_MIPS_FLAGS:
+    printFlags(Value, makeArrayRef(ElfDynamicDTMipsFlags), OS);
+    break;
+  case DT_FLAGS:
+    printFlags(Value, makeArrayRef(ElfDynamicDTFlags), OS);
+    break;
   }
 }