tools: add support for decoding ARM attributes

Enhance the ARM specific parsing support in llvm-readobj to support attributes.
This allows for simpler tests to validate encoding of the build attributes as
specified in the ARM ELF specification.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200450 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 124 insertions, 0 deletions

diff --git a/tools/llvm-readobj/ARMAttributeParser.h b/tools/llvm-readobj/ARMAttributeParser.h
new file mode 100644
index 0000000000..c2862513b7
--- /dev/null
+++ b/tools/llvm-readobj/ARMAttributeParser.h
@@ -0,0 +1,124 @@
+//===--- ARMAttributeParser.h - ARM Attribute Information Printer ---------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_READOBJ_ARMATTRIBUTE_PARSER_H
+#define LLVM_READOBJ_ARMATTRIBUTE_PARSER_H
+
+#include "StreamWriter.h"
+#include "llvm/Support/ARMBuildAttributes.h"
+
+namespace llvm {
+class StringRef;
+
+class ARMAttributeParser {
+  StreamWriter &SW;
+
+  struct DisplayHandler {
+    ARMBuildAttrs::AttrType Attribute;
+    void (ARMAttributeParser::*Routine)(ARMBuildAttrs::AttrType,
+                                        const uint8_t *, uint32_t &);
+  };
+  static const DisplayHandler DisplayRoutines[];
+
+  uint64_t ParseInteger(const uint8_t *Data, uint32_t &Offset);
+  StringRef ParseString(const uint8_t *Data, uint32_t &Offset);
+
+  void IntegerAttribute(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                        uint32_t &Offset);
+  void StringAttribute(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                       uint32_t &Offset);
+
+  void PrintAttribute(unsigned Tag, unsigned Value, StringRef ValueDesc);
+
+  void CPU_arch(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                uint32_t &Offset);
+  void CPU_arch_profile(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                        uint32_t &Offset);
+  void ARM_ISA_use(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                   uint32_t &Offset);
+  void THUMB_ISA_use(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                     uint32_t &Offset);
+  void FP_arch(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+               uint32_t &Offset);
+  void WMMX_arch(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                 uint32_t &Offset);
+  void Advanced_SIMD_arch(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                          uint32_t &Offset);
+  void PCS_config(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                  uint32_t &Offset);
+  void ABI_PCS_R9_use(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                      uint32_t &Offset);
+  void ABI_PCS_RW_data(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                       uint32_t &Offset);
+  void ABI_PCS_RO_data(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                       uint32_t &Offset);
+  void ABI_PCS_GOT_use(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                       uint32_t &Offset);
+  void ABI_PCS_wchar_t(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                       uint32_t &Offset);
+  void ABI_FP_rounding(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                       uint32_t &Offset);
+  void ABI_FP_denormal(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                       uint32_t &Offset);
+  void ABI_FP_exceptions(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                         uint32_t &Offset);
+  void ABI_FP_user_exceptions(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                              uint32_t &Offset);
+  void ABI_FP_number_model(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                           uint32_t &Offset);
+  void ABI_align_needed(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                        uint32_t &Offset);
+  void ABI_align_preserved(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                           uint32_t &Offset);
+  void ABI_enum_size(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                     uint32_t &Offset);
+  void ABI_HardFP_use(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                      uint32_t &Offset);
+  void ABI_VFP_args(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                    uint32_t &Offset);
+  void ABI_WMMX_args(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                     uint32_t &Offset);
+  void ABI_optimization_goals(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                              uint32_t &Offset);
+  void ABI_FP_optimization_goals(ARMBuildAttrs::AttrType Tag,
+                                 const uint8_t *Data, uint32_t &Offset);
+  void compatibility(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                     uint32_t &Offset);
+  void CPU_unaligned_access(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                            uint32_t &Offset);
+  void FP_HP_extension(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                       uint32_t &Offset);
+  void ABI_FP_16bit_format(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                           uint32_t &Offset);
+  void MPextension_use(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                       uint32_t &Offset);
+  void DIV_use(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+               uint32_t &Offset);
+  void T2EE_use(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                uint32_t &Offset);
+  void Virtualization_use(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                          uint32_t &Offset);
+  void nodefaults(ARMBuildAttrs::AttrType Tag, const uint8_t *Data,
+                  uint32_t &Offset);
+
+  void ParseAttributeList(const uint8_t *Data, uint32_t &Offset,
+                          uint32_t Length);
+  void ParseIndexList(const uint8_t *Data, uint32_t &Offset,
+                      SmallVectorImpl<uint8_t> &IndexList);
+  void ParseSubsection(const uint8_t *Data, uint32_t Length);
+public:
+  ARMAttributeParser(StreamWriter &SW) : SW(SW) {}
+
+  void Parse(ArrayRef<uint8_t> Section);
+};
+
+}
+
+#endif
+