1 /*

     2 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 *

     5 * This program is free software: you can redistribute it and/or modify

     6 * it under the terms of the GNU Lesser General Public License as published by

     7 * the Free Software Foundation, either version 3 of the License, or

     8 * (at your option) any later version.

     9 *

    10 * This program is distributed in the hope that it will be useful,

    11 * but WITHOUT ANY WARRANTY; without even the implied warranty of

    12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    13 * GNU Lesser General Public License for more details.

    14 * 

    15 * You should have received a copy of the GNU Lesser General Public License

    16 * along with this program.  If not, see <http://www.gnu.org/licenses/>.

    17 */

    18 

    19 #ifndef DWARFDEFS_H_

    20 #define DWARFDEFS_H_

    21 

    22 //#include <libdwarf.h>

    23 /* to identify a cie */

    24 

    25 

    26 #define DW_CIE_ID 		~(0x0)

    27 #define DW_CIE_VERSION		1 /* DWARF2 */

    28 #define DW_CIE_VERSION3		3 /* DWARF3 */

    29 #define ABBREV_HASH_TABLE_SIZE	10

    30 

    31 typedef int                 Dwarf_Bool;     /* boolean type */

    32 //

    33 // Copyright (c) 2008 Symbian Software Ltd. All rights reserved.

    34 //

    35 

    36 typedef unsigned long long  Dwarf_Off;      /* 8 byte file offset */

    37 typedef unsigned long long  Dwarf_Unsigned; /* 8 byte unsigned value*/

    38 typedef unsigned short      Dwarf_Half;     /* 2 byte unsigned value */

    39 typedef unsigned char       Dwarf_Small;    /* 1 byte unsigned value */

    40 typedef signed   long long  Dwarf_Signed;   /* 8 byte signed value */

    41 typedef unsigned long long  Dwarf_Addr;     /* target memory address */

    42 

    43 typedef void*		Dwarf_Ptr;          /* host machine pointer */

    44 

    45 typedef unsigned long Dwarf_Word;

    46 typedef signed long Dwarf_Sword;

    47 

    48 typedef signed char Dwarf_Sbyte;

    49 typedef unsigned char Dwarf_Ubyte;

    50 typedef signed short Dwarf_Shalf;

    51 typedef Dwarf_Ubyte *Dwarf_Byte_Ptr;

    52 

    53 /* these 2 are fixed sizes which must not vary with the

    54 ** ILP32/LP64 model. Between these two, stay at 32 bit.

    55 */

    56 typedef unsigned int Dwarf_ufixed;

    57 typedef int Dwarf_sfixed;

    58 

    59 /*

    60         In various places the code mistakenly associates

    61         forms 8 bytes long with Dwarf_Signed or Dwarf_Unsigned

    62 	This is not a very portable assumption.

    63         The following should be used instead for 64 bit integers.

    64 */

    65 typedef unsigned long long Dwarf_ufixed64;

    66 typedef long long Dwarf_sfixed64;

    67 

    68 char * GetDwarfTag(Dwarf_Unsigned aTag);

    69 char * GetDwarfAttr(Dwarf_Half attr);

    70 char * GetDwarfForm(Dwarf_Half form);

    71 

    72 #define READ_UNALIGNED2(aPtr)ReadUnaligned2(aPtr)

    73 static inline Dwarf_Word ReadUnaligned2(Dwarf_Byte_Ptr aPtr){

    74 	Dwarf_Byte_Ptr p = aPtr;

    75 	return p[0] | (p[1] << 8); 

    76 }

    77 #define READ_UNALIGNED4(aPtr)ReadUnaligned4(aPtr)

    78 static inline Dwarf_Word ReadUnaligned4(Dwarf_Byte_Ptr aPtr){

    79 	Dwarf_Byte_Ptr p = aPtr;

    80 	return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24); 

    81 }

    82 #define WRITE_UNALIGNED2(aPtr, val)WriteUnaligned2(aPtr, val)

    83 static inline void WriteUnaligned2(Dwarf_Byte_Ptr aPtr, Dwarf_Word val){

    84 	Dwarf_Byte_Ptr p = aPtr;

    85 	p[0] = val & 0xff;

    86 	p[1] = (val >> 8) & 0xff;

    87 }

    88 

    89 #define WRITE_UNALIGNED4(aPtr, val)WriteUnaligned4(aPtr, val)

    90 static inline void WriteUnaligned4(Dwarf_Byte_Ptr aPtr, Dwarf_Word val){

    91 	Dwarf_Byte_Ptr p = aPtr;

    92 	p[0] = val & 0xff;

    93 	p[1] = (val >> 8) & 0xff;

    94 	p[2] = (val >> 16) & 0xff;

    95 	p[3] = (val >> 24) & 0xff;

    96 }

    97 

    98 #include <iostream>

    99 static inline Dwarf_Word GetValue(Dwarf_Byte_Ptr start, size_t size){

   100 	switch (size){

   101 	default:

   102 	case 0: {

   103 		std::cerr << "Error: size of " << size << " not allowed\n";

   104 		exit(EXIT_FAILURE);

   105 		}

   106 	case 2:

   107 		return READ_UNALIGNED2(start);

   108 	case 4:

   109 		return READ_UNALIGNED4(start);

   110 	case 8: {

   111 		std::cerr << "Error: 64 bit values not support yet\n";

   112 		exit(EXIT_FAILURE);		

   113 		}

   114 	}	

   115 }

   116 

   117 static inline void WriteValue(Dwarf_Byte_Ptr start, Dwarf_Word val, size_t size){

   118 	switch (size){

   119 	default:

   120 	case 0: {

   121 		std::cerr << "Error: size of " << size << " not allowed\n";

   122 		exit(EXIT_FAILURE);

   123 		}

   124 	case 2:

   125 		WRITE_UNALIGNED2(start, val);

   126 		break;

   127 	case 4:

   128 		WRITE_UNALIGNED4(start, val);

   129 		break;

   130 	case 8: {

   131 		std::cerr << "Error: 64 bit values not support yet\n";

   132 		exit(EXIT_FAILURE);		

   133 		}

   134 	}

   135 	

   136 }

   137 

   138 // TODO: for the moment just say 4 - we are dealing with 32 bit ARM for the foreseeable future

   139 // in the future we need to figure out where to get this from...

   140 #define ENCODED_POINTER_SIZE 4

   141 

   142 #endif /*DWARFDEFS_H_*/