[ARM64][Windows] Add unwind support to llvm-readobj

This patch adds support for dumping the unwind info from ARM64 COFF object
files.

Differential Revision: https://reviews.llvm.org/D53264

llvm-svn: 345108

1 files changed, 50 insertions, 1 deletions

diff --git a/llvm/tools/llvm-readobj/ARMWinEHPrinter.h b/llvm/tools/llvm-readobj/ARMWinEHPrinter.h
index 95f52170226..e271a1e6fe7 100644
--- a/llvm/tools/llvm-readobj/ARMWinEHPrinter.h
+++ b/llvm/tools/llvm-readobj/ARMWinEHPrinter.h
@@ -24,13 +24,16 @@ class Decoder {
 
   ScopedPrinter &SW;
   raw_ostream &OS;
+  bool isAArch64;
 
   struct RingEntry {
     uint8_t Mask;
     uint8_t Value;
+    uint8_t Length;
     bool (Decoder::*Routine)(const uint8_t *, unsigned &, unsigned, bool);
   };
   static const RingEntry Ring[];
+  static const RingEntry Ring64[];
 
   bool opcode_0xxxxxxx(const uint8_t *Opcodes, unsigned &Offset,
                        unsigned Length, bool Prologue);
@@ -75,6 +78,50 @@ class Decoder {
   bool opcode_11111111(const uint8_t *Opcodes, unsigned &Offset,
                        unsigned Length, bool Prologue);
 
+  // ARM64 unwind codes start here.
+  bool opcode_alloc_s(const uint8_t *Opcodes, unsigned &Offset, unsigned Length,
+                      bool Prologue);
+  bool opcode_save_r19r20_x(const uint8_t *Opcodes, unsigned &Offset,
+                            unsigned Length, bool Prologue);
+  bool opcode_save_fplr(const uint8_t *Opcodes, unsigned &Offset,
+                        unsigned Length, bool Prologue);
+  bool opcode_save_fplr_x(const uint8_t *Opcodes, unsigned &Offset,
+                          unsigned Length, bool Prologue);
+  bool opcode_alloc_m(const uint8_t *Opcodes, unsigned &Offset, unsigned Length,
+                      bool Prologue);
+  bool opcode_save_regp(const uint8_t *Opcodes, unsigned &Offset,
+                        unsigned Length, bool Prologue);
+  bool opcode_save_regp_x(const uint8_t *Opcodes, unsigned &Offset,
+                          unsigned Length, bool Prologue);
+  bool opcode_save_reg(const uint8_t *Opcodes, unsigned &Offset,
+                       unsigned Length, bool Prologue);
+  bool opcode_save_reg_x(const uint8_t *Opcodes, unsigned &Offset,
+                         unsigned Length, bool Prologue);
+  bool opcode_save_lrpair(const uint8_t *Opcodes, unsigned &Offset,
+                          unsigned Length, bool Prologue);
+  bool opcode_save_fregp(const uint8_t *Opcodes, unsigned &Offset,
+                         unsigned Length, bool Prologue);
+  bool opcode_save_fregp_x(const uint8_t *Opcodes, unsigned &Offset,
+                           unsigned Length, bool Prologue);
+  bool opcode_save_freg(const uint8_t *Opcodes, unsigned &Offset,
+                        unsigned Length, bool Prologue);
+  bool opcode_save_freg_x(const uint8_t *Opcodes, unsigned &Offset,
+                          unsigned Length, bool Prologue);
+  bool opcode_alloc_l(const uint8_t *Opcodes, unsigned &Offset, unsigned Length,
+                      bool Prologue);
+  bool opcode_setfp(const uint8_t *Opcodes, unsigned &Offset, unsigned Length,
+                    bool Prologue);
+  bool opcode_addfp(const uint8_t *Opcodes, unsigned &Offset, unsigned Length,
+                    bool Prologue);
+  bool opcode_nop(const uint8_t *Opcodes, unsigned &Offset, unsigned Length,
+                  bool Prologue);
+  bool opcode_end(const uint8_t *Opcodes, unsigned &Offset, unsigned Length,
+                  bool Prologue);
+  bool opcode_end_c(const uint8_t *Opcodes, unsigned &Offset, unsigned Length,
+                    bool Prologue);
+  bool opcode_save_next(const uint8_t *Opcodes, unsigned &Offset,
+                        unsigned Length, bool Prologue);
+
   void decodeOpcodes(ArrayRef<uint8_t> Opcodes, unsigned Offset,
                      bool Prologue);
 
@@ -107,7 +154,9 @@ class Decoder {
                          const object::SectionRef Section);
 
 public:
-  Decoder(ScopedPrinter &SW) : SW(SW), OS(SW.getOStream()) {}
+  Decoder(ScopedPrinter &SW, bool isAArch64) : SW(SW),
+                                               OS(SW.getOStream()),
+                                               isAArch64(isAArch64) {}
   std::error_code dumpProcedureData(const object::COFFObjectFile &COFF);
 };
 }