1 files changed, 114 insertions, 0 deletions
diff --git a/src/vm/gdbjit.h b/src/vm/gdbjit.h
new file mode 100644
index 0000000000..467a970c0b
--- /dev/null
+++ b/src/vm/gdbjit.h
@@ -0,0 +1,114 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+//*****************************************************************************
+// File: gdbjit.h
+// 
+
+//
+// Header file for GDB JIT interface implemenation.
+//
+//*****************************************************************************
+
+
+#ifndef __GDBJIT_H__
+#define __GDBJIT_H__
+
+#include <stdint.h>
+#include "method.hpp"
+#include "../inc/llvm/ELF.h"
+#include "../inc/llvm/Dwarf.h"
+
+#if defined(_TARGET_X86_) || defined(_TARGET_ARM_)
+    typedef Elf32_Ehdr  Elf_Ehdr;
+    typedef Elf32_Shdr  Elf_Shdr;
+    typedef Elf32_Sym   Elf_Sym;
+#define ADDRESS_SIZE 4    
+#elif defined(_TARGET_AMD64_) || defined(_TARGET_ARM64_)
+    typedef Elf64_Ehdr  Elf_Ehdr;
+    typedef Elf64_Shdr  Elf_Shdr;
+    typedef Elf64_Sym   Elf_Sym;
+#define ADDRESS_SIZE 8    
+#else
+#error "Target is not supported"
+#endif
+
+struct __attribute__((packed)) DwarfCompUnit
+{
+    uint32_t m_length;
+    uint16_t m_version;
+    uint32_t m_abbrev_offset;
+    uint8_t m_addr_size;
+};
+
+struct __attribute__((packed)) DwarfPubHeader
+{
+    uint32_t m_length;
+    uint16_t m_version;
+    uint32_t m_debug_info_off;
+    uint32_t m_debug_info_len;
+};
+
+#define DW_LNS_MAX DW_LNS_set_isa
+
+struct __attribute__((packed)) DwarfLineNumHeader
+{
+    uint32_t m_length;
+    uint16_t m_version;
+    uint32_t m_hdr_length;
+    uint8_t m_min_instr_len;
+    uint8_t m_def_is_stmt;
+    int8_t m_line_base;
+    uint8_t m_line_range;
+    uint8_t m_opcode_base;
+    uint8_t m_std_num_arg[DW_LNS_MAX];
+};
+
+struct SymbolsInfo
+{
+    int lineNumber, ilOffset, nativeOffset, fileIndex;
+    char fileName[2*MAX_PATH_FNAME];
+};
+
+
+class NotifyGdb
+{
+public:
+    static void MethodCompiled(MethodDesc* MethodDescPtr);
+    static void MethodDropped(MethodDesc* MethodDescPtr);
+private:
+    struct MemBuf
+    {
+        NewArrayHolder<char> MemPtr;
+        unsigned MemSize;
+        MemBuf() : MemPtr(0), MemSize(0)
+        {}
+    };
+
+    static bool BuildELFHeader(MemBuf& buf);
+    static bool BuildSectionNameTable(MemBuf& buf);
+    static bool BuildSectionTable(MemBuf& buf);
+    static bool BuildSymbolTableSection(MemBuf& buf, PCODE addr, TADDR codeSize);
+    static bool BuildStringTableSection(MemBuf& strTab);
+    static bool BuildDebugStrings(MemBuf& buf);
+    static bool BuildDebugAbbrev(MemBuf& buf);    
+    static bool BuildDebugInfo(MemBuf& buf);
+    static bool BuildDebugPub(MemBuf& buf, const char* name, uint32_t size, uint32_t dieOffset);
+    static bool BuildLineTable(MemBuf& buf, PCODE startAddr, SymbolsInfo* lines, unsigned nlines);
+    static bool BuildFileTable(MemBuf& buf, SymbolsInfo* lines, unsigned nlines);
+    static bool BuildLineProg(MemBuf& buf, PCODE startAddr, SymbolsInfo* lines, unsigned nlines);
+    static bool FitIntoSpecialOpcode(int8_t line_shift, uint8_t addr_shift);
+    static void IssueSetAddress(char*& ptr, PCODE addr);
+    static void IssueEndOfSequence(char*& ptr);
+    static void IssueSimpleCommand(char*& ptr, uint8_t command);
+    static void IssueParamCommand(char*& ptr, uint8_t command, char* param, int param_len);
+    static void IssueSpecialCommand(char*& ptr, int8_t line_shift, uint8_t addr_shift);
+    static void SplitPathname(const char* path, const char*& pathName, const char*& fileName);
+    static int Leb128Encode(uint32_t num, char* buf, int size);
+    static int Leb128Encode(int32_t num, char* buf, int size);
+#ifdef _DEBUG
+    static void DumpElf(const char* methodName, const MemBuf& buf);
+#endif
+};
+
+#endif // #ifndef __GDBJIT_H__