git@UCC - tpg/acess2.git/blob - Usermode/Libraries/ld-acess.so

1 /**

2 Acess v1

3 \file elf32.h

4 \brief ELF Exeutable Loader

5 */

6 #ifndef _ELF32_H

7 #define _ELF32_H

9 #include <stdint.h>

11 typedef uint16_t Elf32_Half;

12 typedef uint32_t Elf32_Addr;

13 typedef uint32_t Elf32_Off;

14 typedef uint32_t Elf32_Word;

15 typedef int32_t Elf32_Sword;

17 #define ELFCLASS32 1

19 #define EM_NONE 0

20 #define EM_386 3

21 #define EM_ARM 40

23 /**

24 \struct elf_header_s

25 \brief ELF File Header

26 */

27 struct sElf32_Ehdr {

28 uint8_t e_ident[16]; //!< Identifier Bytes

29 Elf32_Half filetype; //!< File Type

30 Elf32_Half machine; //!< Machine / Arch

31 Elf32_Word version; //!< Version (File?)

32 Elf32_Addr entrypoint; //!< Entry Point

33 Elf32_Off phoff; //!< Program Header Offset

34 Elf32_Word shoff; //!< Section Header Offset

35 Elf32_Word flags; //!< Flags

36 Elf32_Half headersize; //!< Header Size

37 Elf32_Half phentsize; //!< Program Header Entry Size

38 Elf32_Half phentcount; //!< Program Header Entry Count

39 Elf32_Half shentsize; //!< Section Header Entry Size

40 Elf32_Half shentcount; //!< Section Header Entry Count

41 Elf32_Half shstrindex; //!< Section Header String Table Index

42 };

44 /**

45 \name Executable Types

46 \{

47 */

48 #define ET_NONE 0 //!< NULL Type

49 #define ET_REL 1 //!< Relocatable (Object)

50 #define ET_EXEC 2 //!< Executable

51 #define ET_DYN 3 //!< Dynamic Library

52 #define ET_CORE 4 //!< Core?

53 #define ET_LOPROC 0xFF00 //!< Low Impl Defined

54 #define ET_HIPROC 0xFFFF //!< High Impl Defined

55 //! \}

57 /**

58 \name Section IDs

59 \{

60 */

61 #define SHN_UNDEF 0 //!< Undefined Section

62 #define SHN_LORESERVE 0xFF00 //!< Low Reserved

63 #define SHN_LOPROC 0xFF00 //!< Low Impl Defined

64 #define SHN_HIPROC 0xFF1F //!< High Impl Defined

65 #define SHN_ABS 0xFFF1 //!< Absolute Address (Base: 0, Size: -1)

66 #define SHN_COMMON 0xFFF2 //!< Common

67 #define SHN_HIRESERVE 0xFFFF //!< High Reserved

68 //! \}

70 /**

71 \enum eElfSectionTypes

72 \brief ELF Section Types

73 */

74 enum eElfSectionTypes {

75 SHT_NULL, //0

76 SHT_PROGBITS, //1

77 SHT_SYMTAB, //2

78 SHT_STRTAB, //3

79 SHT_RELA, //4

80 SHT_HASH, //5

81 SHT_DYNAMIC, //6

82 SHT_NOTE, //7

83 SHT_NOBITS, //8

84 SHT_REL, //9

85 SHT_SHLIB, //A

86 SHT_DYNSYM, //B

87 SHT_LAST, //C

88 SHT_LOPROC = 0x70000000,

89 SHT_HIPROC = 0x7fffffff,

90 SHT_LOUSER = 0x80000000,

91 SHT_HIUSER = 0xffffffff

92 };

94 #if 0

95 #define SHF_WRITE 0x1

96 #define SHF_ALLOC 0x2

97 #define SHF_EXECINSTR 0x4

98 #define SHF_MASKPROC 0xf0000000

100 struct sElf32_Shent {

101 Uint32 name;

102 Uint32 type;

103 Uint32 flags;

104 Uint32 address;

105 Uint32 offset;

106 Uint32 size;

107 Uint32 link;

108 Uint32 info;

109 Uint32 addralign;

110 Uint32 entsize;

111 }; //sizeof = 40

112 #endif

113

114 struct elf_sym_s {

115 Elf32_Word nameOfs;

116 Elf32_Addr value; //Address

117 Elf32_Word size;

118 uint8_t info;

119 uint8_t other;

120 Elf32_Half shndx;

121 };

122 #define STN_UNDEF 0 // Undefined Symbol

123

124 enum {

125 PT_NULL, //0

126 PT_LOAD, //1

127 PT_DYNAMIC, //2

128 PT_INTERP, //3

129 PT_NOTE, //4

130 PT_SHLIB, //5

131 PT_PHDR, //6

132 PT_LOPROC = 0x70000000,

133 PT_HIPROC = 0x7fffffff

134 };

135

136 #define PF_X 1

137 #define PF_W 2

138 #define PF_R 4

139

140 struct sElf32_Phdr {

141 Elf32_Word Type;

142 Elf32_Off Offset;

143 Elf32_Addr VAddr;

144 Elf32_Addr PAddr;

145 Elf32_Word FileSize;

146 Elf32_Word MemSize;

147 Elf32_Word Flags;

148 Elf32_Word Align;

149 };

150

151 struct elf32_rel_s {

152 Elf32_Addr r_offset;

153 Elf32_Word r_info;

154 };

155

156 struct elf32_rela_s {

157 Elf32_Addr r_offset;

158 Elf32_Word r_info;

159 Elf32_Sword r_addend;

160 };

161

162 enum {

163 R_386_NONE=0, // none

164 R_386_32, // S+A

165 R_386_PC32, // S+A-P

166 R_386_GOT32, // G+A-P

167 R_386_PLT32, // L+A-P

168 R_386_COPY, // none

169 R_386_GLOB_DAT, // S

170 R_386_JMP_SLOT, // S

171 R_386_RELATIVE, // B+A

172 R_386_GOTOFF, // S+A-GOT

173 R_386_GOTPC, // GOT+A-P

174 R_386_LAST // none

175 };

176

177 // NOTES:

178 // 'T' means the thumb bit

179 // 'B(S)' Origin of a symbol

180 enum {

181 R_ARM_NONE, // 0 No action

182 R_ARM_PC24, // 1 ((S + A) | T) - P

183 R_ARM_ABS32, // 2 (S + A) | T

184 R_ARM_REL32, // 3 ((S + A) | T) - P

185 R_ARM_LDR_PC_G0, // 4 S + A - P

186 R_ARM_ABS16, // 5 S + A

187 R_ARM_ABS12, // 6 S + A

188 R_ARM_THM_ABS5, // 7 S + A

189 R_ARM_ABS8, // 8 S + A

190 R_ARM_SBREL32, // 9 ((S + A) | T) - B(S)

191 R_ARM_THM_CALL, // 10 ((S + A) | T) - P

192 R_ARM_THM_PC8, // 11 S + A - Pa,

193 R_ARM_BREL_ADJ, // 12 ΔB(S) + A

194 R_ARM_TLS_DESC, // 13 --

195 R_ARM_THM_SWI8, // 14 (Reserved)

196 R_ARM_XPC25, // 15 (Reserved)

197 R_ARM_THM_XPC22, // 16 (Reserved)

198 R_ARM_TLS_DTPMOD32, // 17 Module[S]

199 R_ARM_TLS_DTPOFF32, // 18 S + A - TLS

200 R_ARM_TLS_TPOFF32, // 19 S + A - tp

201 R_ARM_COPY, // 20 Misc

202 R_ARM_GLOB_DAT, // 21 (S + A) | T

203 R_ARM_JUMP_SLOT, // 22 (S + A) | T

204 R_ARM_RELATIVE, // 23 B(S) + A (extra?)

205 // ... More defined (IHI0044)

206 };

207

208 #define ELF32_R_SYM(i) ((i)>>8) // Takes an info value and returns a symbol index

209 #define ELF32_R_TYPE(i) ((i)&0xFF) // Takes an info value and returns a type

210 #define ELF32_R_INFO(s,t) (((s)<<8)+((t)&0xFF)) // Takes a type and symbol index and returns an info value

211

212 struct elf32_dyn_s {

213 Elf32_Half d_tag;

214 Elf32_Word d_val; //Also d_ptr

215 };

216

217 enum {

218 DT_NULL, //!< Marks End of list

219 DT_NEEDED, //!< Offset in strtab to needed library

220 DT_PLTRELSZ, //!< Size in bytes of PLT

221 DT_PLTGOT, //!< Address of PLT/GOT

222 DT_HASH, //!< Address of symbol hash table

223 DT_STRTAB, //!< String Table address

224 DT_SYMTAB, //!< Symbol Table address

225 DT_RELA, //!< Relocation table address

226 DT_RELASZ, //!< Size of relocation table

227 DT_RELAENT, //!< Size of entry in relocation table

228 DT_STRSZ, //!< Size of string table

229 DT_SYMENT, //!< Size of symbol table entry

230 DT_INIT, //!< Address of initialisation function

231 DT_FINI, //!< Address of termination function

232 DT_SONAME, //!< String table offset of so name

233 DT_RPATH, //!< String table offset of library path

234 DT_SYMBOLIC,//!< Reverse order of symbol searching for library, search libs first then executable

235 DT_REL, //!< Relocation Entries (Elf32_Rel instead of Elf32_Rela)

236 DT_RELSZ, //!< Size of above table (bytes)

237 DT_RELENT, //!< Size of entry in above table

238 DT_PLTREL, //!< Relocation entry of PLT

239 DT_DEBUG, //!< Debugging Entry - Unknown contents

240 DT_TEXTREL, //!< Indicates that modifcations to a non-writeable segment may occur

241 DT_JMPREL, //!< Address of PLT only relocation entries

242 DT_LOPROC = 0x70000000, //!< Low Definable

243 DT_HIPROC = 0x7FFFFFFF //!< High Definable

244 };

245

246 typedef struct sElf32_Ehdr Elf32_Ehdr;

247 typedef struct sElf32_Phdr Elf32_Phdr;

248 typedef struct sElf32_Shent Elf32_Shent;

249 typedef struct elf_sym_s elf_symtab;

250 typedef struct elf_sym_s Elf32_Sym;

251 typedef struct elf32_rel_s Elf32_Rel;

252 typedef struct elf32_rela_s Elf32_Rela;

253 typedef struct elf32_dyn_s Elf32_Dyn;

254

255 #endif // defined(_EXE_ELF_H)