[llvm-readobj] Decode st_other symbol's flags

The patch supports common STV_xxx visibility flags and MIPS specific
STO_MIPS_xxx flags.

Differential Revision: http://reviews.llvm.org/D18447

llvm-svn: 264300

12 files changed, 102 insertions, 18 deletions

diff --git a/llvm/test/MC/Mips/elf_st_other.s b/llvm/test/MC/Mips/elf_st_other.s
index 579707b6be3..a53801729cd 100644
--- a/llvm/test/MC/Mips/elf_st_other.s
+++ b/llvm/test/MC/Mips/elf_st_other.s
@@ -21,6 +21,6 @@ f2:
 // CHECK-LABEL: Name: d1
 // CHECK:       Other: 0
 // CHECK-LABEL: Name: f1
-// CHECK:       Other: 128
+// CHECK:       Other [ (0x80)
 // CHECK-LABEL: Name: f2
 // CHECK:       Other: 0
diff --git a/llvm/test/MC/Mips/insn-directive.s b/llvm/test/MC/Mips/insn-directive.s
index 760a27399bf..f8cc1d6812d 100644
--- a/llvm/test/MC/Mips/insn-directive.s
+++ b/llvm/test/MC/Mips/insn-directive.s
@@ -73,10 +73,10 @@ bar:
 # OBJ: Other: 0
 
 # OBJ: Name: f_mm_insn_data
-# OBJ: Other: 128
+# OBJ: Other [ (0x80)
 
 # OBJ: Name: f_mm_insn_instr
-# OBJ: Other: 128
+# OBJ: Other [ (0x80)
 
 # OBJ: Name: f_normal_insn_data
 # OBJ: Other: 0
@@ -85,10 +85,10 @@ bar:
 # OBJ: Other: 0
 
 # OBJ: Name: o_mm_insn_data
-# OBJ: Other: 128
+# OBJ: Other [ (0x80)
 
 # OBJ: Name: o_mm_insn_instr
-# OBJ: Other: 128
+# OBJ: Other [ (0x80)
 
 # OBJ: Name: o_normal_insn_data
 # OBJ: Other: 0
diff --git a/llvm/test/MC/Mips/micromips-alias.s b/llvm/test/MC/Mips/micromips-alias.s
index 256b3b68aa6..c955dd9974a 100644
--- a/llvm/test/MC/Mips/micromips-alias.s
+++ b/llvm/test/MC/Mips/micromips-alias.s
@@ -3,7 +3,7 @@
 
 # Symbol bar must be marked as micromips.
 # CHECK: Name: bar
-# CHECK: Other: 128
+# CHECK: Other [ (0x80)
   .align 2
   .type  f,@function
   .set   nomips16
@@ -16,7 +16,7 @@ f:
 bar = f
 
 # CHECK: Name: foo
-# CHECK: Other: 128
+# CHECK: Other [ (0x80)
   .type  o,@object
   .set   micromips
 o:
diff --git a/llvm/test/MC/Mips/micromips-label-test-sections.s b/llvm/test/MC/Mips/micromips-label-test-sections.s
index 569b64c6f98..e24f6a4d17c 100644
--- a/llvm/test/MC/Mips/micromips-label-test-sections.s
+++ b/llvm/test/MC/Mips/micromips-label-test-sections.s
@@ -14,7 +14,9 @@ h:
 # CHECK:     Name: f
 # CHECK:     Binding: Local
 # CHECK:     Type: None
-# CHECK:     Other: 128
+# CHECK:     Other [ (0x80)
+# CHECK:       STO_MIPS_MICROMIPS
+# CHECK:     ]
 # CHECK:     Section: .text
 # CHECK:   }
 # CHECK:   Symbol {
@@ -28,7 +30,9 @@ h:
 # CHECK:     Name: h
 # CHECK:     Binding: Local
 # CHECK:     Type: None
-# CHECK:     Other: 128
+# CHECK:     Other [ (0x80)
+# CHECK:       STO_MIPS_MICROMIPS
+# CHECK:     ]
 # CHECK:     Section: .text
 # CHECK:   }
 # CHECK: ]
diff --git a/llvm/test/MC/Mips/micromips-label-test.s b/llvm/test/MC/Mips/micromips-label-test.s
index cc1566b9e67..39c905c06db 100644
--- a/llvm/test/MC/Mips/micromips-label-test.s
+++ b/llvm/test/MC/Mips/micromips-label-test.s
@@ -26,7 +26,9 @@ j:
 # CHECK:     Name: g
 # CHECK:     Binding: Local
 # CHECK:     Type: None
-# CHECK:     Other: 128
+# CHECK:     Other [ (0x80)
+# CHECK:       STO_MIPS_MICROMIPS
+# CHECK:     ]
 # CHECK:     Section: .text
 # CHECK:   }
 # CHECK:   Symbol {
@@ -40,7 +42,9 @@ j:
 # CHECK:     Name: i
 # CHECK:     Binding: Local
 # CHECK:     Type: None
-# CHECK:     Other: 128
+# CHECK:     Other [ (0x80)
+# CHECK:       STO_MIPS_MICROMIPS
+# CHECK:     ]
 # CHECK:     Section: .text
 # CHECK:   }
 # CHECK:   Symbol {
diff --git a/llvm/test/MC/PowerPC/ppc64-localentry.s b/llvm/test/MC/PowerPC/ppc64-localentry.s
index 03f760ef86e..cc1de288fc1 100644
--- a/llvm/test/MC/PowerPC/ppc64-localentry.s
+++ b/llvm/test/MC/PowerPC/ppc64-localentry.s
@@ -61,7 +61,8 @@ copy2 = callee2
 # CHECK-NEXT:  Size: 16
 # CHECK-NEXT:  Binding: Local
 # CHECK-NEXT:  Type: Function
-# CHECK-NEXT:  Other: 96
+# CHECK-NEXT:  Other [ (0x60)
+# CHECK-NEXT:  ]
 # CHECK-NEXT:  Section: .text
 # CHECK:       Name: callee2
 # CHECK-NEXT:  Value:
@@ -77,7 +78,8 @@ copy2 = callee2
 # CHECK-NEXT:  Size: 16
 # CHECK-NEXT:  Binding: Local
 # CHECK-NEXT:  Type: Function
-# CHECK-NEXT:  Other: 96
+# CHECK-NEXT:  Other [ (0x60)
+# CHECK-NEXT:  ]
 # CHECK-NEXT:  Section: .text
 # CHECK:       Name: copy2
 # CHECK-NEXT:  Value:
diff --git a/llvm/test/MC/PowerPC/st-other-crash.s b/llvm/test/MC/PowerPC/st-other-crash.s
index 20f51f76137..26d8d2dc0c3 100644
--- a/llvm/test/MC/PowerPC/st-other-crash.s
+++ b/llvm/test/MC/PowerPC/st-other-crash.s
@@ -9,7 +9,8 @@
 // CHECK-NEXT:    Size: 0
 // CHECK-NEXT:    Binding: Local (0x0)
 // CHECK-NEXT:    Type: None (0x0)
-// CHECK-NEXT:    Other: 64
+// CHECK-NEXT:    Other [ (0x40)
+// CHECK-NEXT:    ]
 // CHECK-NEXT:    Section: .group
 // CHECK-NEXT:  }
 
diff --git a/llvm/test/Object/yaml2obj-elf-symbol-visibility.yaml b/llvm/test/Object/yaml2obj-elf-symbol-visibility.yaml
index 6c4037c831d..43d2b8f6fb4 100644
--- a/llvm/test/Object/yaml2obj-elf-symbol-visibility.yaml
+++ b/llvm/test/Object/yaml2obj-elf-symbol-visibility.yaml
@@ -26,7 +26,9 @@
 # OBJ-NEXT:   Size: 4
 # OBJ-NEXT:   Binding: Global (0x1)
 # OBJ-NEXT:   Type: Object (0x1)
-# OBJ-NEXT:   Other: 1
+# OBJ-NEXT:   Other [ (0x1)
+# OBJ-NEXT:     STV_INTERNAL
+# OBJ-NEXT:   ]
 # OBJ-NEXT:   Section: .data (0x1)
 # OBJ-NEXT: }
 # OBJ-NEXT: Symbol {
@@ -35,7 +37,9 @@
 # OBJ-NEXT:   Size: 4
 # OBJ-NEXT:   Binding: Global (0x1)
 # OBJ-NEXT:   Type: Object (0x1)
-# OBJ-NEXT:   Other: 2
+# OBJ-NEXT:   Other [ (0x2)
+# OBJ-NEXT:     STV_HIDDEN
+# OBJ-NEXT:   ]
 # OBJ-NEXT:   Section: .data (0x1)
 # OBJ-NEXT: }
 # OBJ-NEXT: Symbol {
@@ -44,7 +48,11 @@
 # OBJ-NEXT:   Size: 4
 # OBJ-NEXT:   Binding: Global (0x1)
 # OBJ-NEXT:   Type: Object (0x1)
-# OBJ-NEXT:   Other: 163
+# OBJ-NEXT:   Other [ (0xA3)
+# OBJ-NEXT:     STO_MIPS_MICROMIPS
+# OBJ-NEXT:     STO_MIPS_PIC
+# OBJ-NEXT:     STV_PROTECTED
+# OBJ-NEXT:   ]
 # OBJ-NEXT:   Section: .data (0x1)
 # OBJ-NEXT: }
 
diff --git a/llvm/test/tools/llvm-readobj/Inputs/st-other.obj.elf-mips b/llvm/test/tools/llvm-readobj/Inputs/st-other.obj.elf-mips
new file mode 100644
index 00000000000..80cefc192d4
--- /dev/null
+++ b/llvm/test/tools/llvm-readobj/Inputs/st-other.obj.elf-mips
diff --git a/llvm/test/tools/llvm-readobj/Inputs/st-other.obj.elf-mips16 b/llvm/test/tools/llvm-readobj/Inputs/st-other.obj.elf-mips16
new file mode 100644
index 00000000000..5f0a0e3de8e
--- /dev/null
+++ b/llvm/test/tools/llvm-readobj/Inputs/st-other.obj.elf-mips16
diff --git a/llvm/test/tools/llvm-readobj/mips-st-other.test b/llvm/test/tools/llvm-readobj/mips-st-other.test
new file mode 100644
index 00000000000..1f9de58ca89
--- /dev/null
+++ b/llvm/test/tools/llvm-readobj/mips-st-other.test
@@ -0,0 +1,25 @@
+RUN: llvm-readobj -symbols %p/Inputs/st-other.obj.elf-mips \
+RUN:   | FileCheck -check-prefix=MREG %s
+RUN: llvm-readobj -symbols %p/Inputs/st-other.obj.elf-mips16 \
+RUN:   | FileCheck -check-prefix=M16 %s
+
+MREG:      Name: foo
+MREG-NEXT: Value: 0x0
+MREG-NEXT: Size: 0
+MREG-NEXT: Binding: Global
+MREG-NEXT: Type: None
+MREG-NEXT: Other [ (0x29)
+MREG-NEXT:   STO_MIPS_PIC (0x20)
+MREG-NEXT:   STO_MIPS_PLT (0x8)
+MREG-NEXT:   STV_INTERNAL (0x1)
+MREG-NEXT: ]
+
+M16:      Name: foo
+M16-NEXT: Value: 0x0
+M16-NEXT: Size: 0
+M16-NEXT: Binding: Global
+M16-NEXT: Type: None
+M16-NEXT: Other [ (0xF1)
+M16-NEXT:   STO_MIPS_MIPS16 (0xF0)
+M16-NEXT:   STV_INTERNAL (0x1)
+M16-NEXT: ]
diff --git a/llvm/tools/llvm-readobj/ELFDumper.cpp b/llvm/tools/llvm-readobj/ELFDumper.cpp
index be212596536..c220844dde0 100644
--- a/llvm/tools/llvm-readobj/ELFDumper.cpp
+++ b/llvm/tools/llvm-readobj/ELFDumper.cpp
@@ -1128,6 +1128,25 @@ static const EnumEntry<unsigned> ElfHeaderMipsFlags[] = {
   LLVM_READOBJ_ENUM_ENT(ELF, EF_MIPS_ARCH_64R6)
 };
 
+static const EnumEntry<unsigned> ElfSymOtherFlags[] = {
+  LLVM_READOBJ_ENUM_ENT(ELF, STV_INTERNAL),
+  LLVM_READOBJ_ENUM_ENT(ELF, STV_HIDDEN),
+  LLVM_READOBJ_ENUM_ENT(ELF, STV_PROTECTED)
+};
+
+static const EnumEntry<unsigned> ElfMipsSymOtherFlags[] = {
+  LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_OPTIONAL),
+  LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_PLT),
+  LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_PIC),
+  LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_MICROMIPS)
+};
+
+static const EnumEntry<unsigned> ElfMips16SymOtherFlags[] = {
+  LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_OPTIONAL),
+  LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_PLT),
+  LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_MIPS16)
+};
+
 template <typename ELFT>
 ELFDumper<ELFT>::ELFDumper(const ELFFile<ELFT> *Obj, StreamWriter &Writer)
     : ObjDumper(Writer), Obj(Obj) {
@@ -2883,7 +2902,28 @@ void LLVMStyle<ELFT>::printSymbol(const ELFO *Obj, const Elf_Sym *Symbol,
     W.printEnum("Type", SymbolType, makeArrayRef(AMDGPUSymbolTypes));
   else
     W.printEnum("Type", SymbolType, makeArrayRef(ElfSymbolTypes));
-  W.printNumber("Other", Symbol->st_other);
+  if (Symbol->st_other == 0)
+    // Usually st_other flag is zero. Do not pollute the output
+    // by flags enumeration in that case.
+    W.printNumber("Other", 0);
+  else {
+    std::vector<EnumEntry<unsigned>> SymOtherFlags(std::begin(ElfSymOtherFlags),
+                                                   std::end(ElfSymOtherFlags));
+    if (Obj->getHeader()->e_machine == EM_MIPS) {
+      // Someones in their infinite wisdom decided to make STO_MIPS_MIPS16
+      // flag overlapped with other ST_MIPS_xxx flags. So consider both
+      // cases separately.
+      if ((Symbol->st_other & STO_MIPS_MIPS16) == STO_MIPS_MIPS16)
+        SymOtherFlags.insert(SymOtherFlags.end(),
+                             std::begin(ElfMips16SymOtherFlags),
+                             std::end(ElfMips16SymOtherFlags));
+      else
+        SymOtherFlags.insert(SymOtherFlags.end(),
+                             std::begin(ElfMipsSymOtherFlags),
+                             std::end(ElfMipsSymOtherFlags));
+    }
+    W.printFlags("Other", Symbol->st_other, makeArrayRef(SymOtherFlags), 0x3u);
+  }
   W.printHex("Section", SectionName, SectionIndex);
 }