3 * \brief ELF definition
6 * \author Frank Mehnert <fm3@os.inf.tu-dresden.de>
7 * Alexander Warg <aw11@os.inf.tu-dresden.de>
10 * "Executable and Linkable Format (ELF)",
11 * Portable Formats Specification, Version 1.1
13 * "System V Application Binary Interface - DRAFT - April 29, 1998"
14 * The Santa Cruz Operation, Inc.
15 * (see http://www.sco.com/developer/gabi/contents.html)
20 * (c) 2008-2009 Author(s)
21 * economic rights: Technische Universität Dresden (Germany)
22 * This file is part of TUD:OS and distributed under the terms of the
23 * GNU Lesser General Public License 2.1.
24 * Please see the COPYING-LGPL-2.1 file for details.
27 /* (c) 2003-2006 Technische Universitaet Dresden
28 * This file is part of the exec package, which is distributed under
29 * the terms of the GNU General Public License 2. Please see the
30 * COPYING file for details. */
32 #ifndef _L4_EXEC_ELF_H
33 #define _L4_EXEC_ELF_H
35 #include <l4/sys/l4int.h>
38 * \defgroup l4util_elf ELF binary format
40 * \brief Functions and types related to ELF binaries.
47 typedef l4_uint32_t Elf32_Addr; /**< size 4 align 4 \ingroup l4util_elf*/
48 typedef l4_uint32_t Elf32_Off; /**< size 4 align 4 \ingroup l4util_elf*/
49 typedef l4_uint16_t Elf32_Half; /**< size 2 align 2 \ingroup l4util_elf*/
50 typedef l4_uint32_t Elf32_Word; /**< size 4 align 4 \ingroup l4util_elf*/
51 typedef l4_int32_t Elf32_Sword; /**< size 4 align 4 \ingroup l4util_elf*/
52 typedef l4_uint64_t Elf64_Addr; /**< size 8 align 8 \ingroup l4util_elf*/
53 typedef l4_uint64_t Elf64_Off; /**< size 8 align 8 \ingroup l4util_elf*/
54 typedef l4_uint16_t Elf64_Half; /**< size 2 align 2 \ingroup l4util_elf*/
55 typedef l4_uint32_t Elf64_Word; /**< size 4 align 4 \ingroup l4util_elf*/
56 typedef l4_int32_t Elf64_Sword; /**< size 4 align 4 \ingroup l4util_elf*/
57 typedef l4_uint64_t Elf64_Xword; /**< size 8 align 8 \ingroup l4util_elf*/
58 typedef l4_int64_t Elf64_Sxword; /**< size 8 align 8 \ingroup l4util_elf*/
61 #if L4_MWORD_BITS == 64
63 * \brief Use 64 or 32 bits types depending on the target architecture.
66 #define ElfW(type) _ElfW(Elf, 64, type)
68 #define ElfW(type) _ElfW(Elf, 32, type)
70 #define _ElfW(e,w,t) __ElfW(e, w, _##t)
71 #define __ElfW(e,w,t) e##w##t
74 #define L4_ARCH_EI_DATA ELFDATA2LSB
75 #define L4_ARCH_E_MACHINE EM_386
76 #define L4_ARCH_EI_CLASS ELFCLASS32
79 #define L4_ARCH_EI_DATA ELFDATA2LSB
80 #define L4_ARCH_E_MACHINE EM_AMD64
81 #define L4_ARCH_EI_CLASS ELFCLASS64
84 #define L4_ARCH_EI_DATA ELFDATA2LSB
85 #define L4_ARCH_E_MACHINE EM_ARM
86 #define L4_ARCH_EI_CLASS ELFCLASS32
89 #define L4_ARCH_EI_DATA ELFDATA2MSB
90 #define L4_ARCH_E_MACHINE EM_PPC
91 #define L4_ARCH_EI_CLASS ELFCLASS32
94 #define L4_ARCH_EI_DATA ELFDATA2MSB
95 #define L4_ARCH_E_MACHINE EM_SPARC
96 #define L4_ARCH_EI_CLASS ELFCLASS32
98 #warning elf.h: Unsupported build architecture!
106 /*************************************/
107 /* ELF Header - figure 1-3, page 1-3 */
108 /*************************************/
110 /** \addtogroup l4util_elf */
114 #define EI_NIDENT 16 /**< \brief number of characters */
116 * \brief ELF32 header.
119 unsigned char e_ident[EI_NIDENT];
120 Elf32_Half e_type; /**< type of ELF file */
121 Elf32_Half e_machine; /**< required architecture */
122 Elf32_Word e_version; /**< file version */
123 Elf32_Addr e_entry; /**< initial eip */
124 Elf32_Off e_phoff; /**< offset of program header table */
125 Elf32_Off e_shoff; /**< offset of file header table */
126 Elf32_Word e_flags; /**< processor-specific flags */
127 Elf32_Half e_ehsize; /**< size of ELF header */
128 Elf32_Half e_phentsize; /**< size of program header entry */
129 Elf32_Half e_phnum; /**< # of entries in prog. head. tab. */
130 Elf32_Half e_shentsize; /**< size of section header entry */
131 Elf32_Half e_shnum; /**< # of entries in sect. head. tab. */
132 Elf32_Half e_shstrndx; /**< sect.head.tab.idx of strtab */
136 * \brief ELF64 header.
139 unsigned char e_ident[EI_NIDENT];
140 Elf64_Half e_type; /**< \brief type of ELF file */
141 Elf64_Half e_machine; /**< \brief required architecture */
142 Elf64_Word e_version; /**< \brief file version */
143 Elf64_Addr e_entry; /**< \brief initial eip */
144 Elf64_Off e_phoff; /**< \brief offset of program header table */
145 Elf64_Off e_shoff; /**< \brief offset of file header table */
146 Elf64_Word e_flags; /**< \brief processor-specific flags */
147 Elf64_Half e_ehsize; /**< \brief size of ELF header */
148 Elf64_Half e_phentsize; /**< \brief size of program header entry */
149 Elf64_Half e_phnum; /**< \brief # of entries in prog. head. tab. */
150 Elf64_Half e_shentsize; /**< \brief size of section header entry */
151 Elf64_Half e_shnum; /**< \brief # of entries in sect. head. tab. */
152 Elf64_Half e_shstrndx; /**< \brief sect.head.tab.idx of strtab */
155 #define EI_CLASS 4 /**< \brief ELF class byte index */
156 #define ELFCLASSNONE 0 /**< \brief Invalid ELF class */
157 #define ELFCLASS32 1 /**< \brief 32-bit objects */
158 #define ELFCLASS64 2 /**< \brief 64-bit objects */
159 #define ELFCLASSNUM 3 /**< \brief Mask for 32-bit or 64-bit class */
161 #define EI_DATA 5 /**< Data encoding byte index */
162 #define ELFDATANONE 0 /**< Invalid data encoding */
163 #define ELFDATA2LSB 1 /**< 2's complement, little endian */
164 #define ELFDATA2MSB 2 /**< 2's complement, big endian */
167 #define EI_VERSION 6 /**< File version byte index */
168 /**< Value must be EV_CURRENT */
170 #define EI_OSABI 7 /**< OS ABI identification */
171 #define ELFOSABI_NONE 0 /**< UNIX System V ABI */
172 #define ELFOSABI_SYSV 0 /**< Alias. */
173 #define ELFOSABI_HPUX 1 /**< HP-UX */
174 #define ELFOSABI_NETBSD 2 /**< NetBSD. */
175 #define ELFOSABI_LINUX 3 /**< Linux. */
176 #define ELFOSABI_SOLARIS 6 /**< Sun Solaris. */
177 #define ELFOSABI_AIX 7 /**< IBM AIX. */
178 #define ELFOSABI_IRIX 8 /**< SGI Irix. */
179 #define ELFOSABI_FREEBSD 9 /**< FreeBSD. */
180 #define ELFOSABI_TRU64 10 /**< Compaq TRU64 UNIX. */
181 #define ELFOSABI_MODESTO 11 /**< Novell Modesto. */
182 #define ELFOSABI_OPENBSD 12 /**< OpenBSD. */
183 #define ELFOSABI_ARM 97 /**< ARM */
184 #define ELFOSABI_STANDALONE 255 /**< Standalone (embedded) application */
186 #define EI_ABIVERSION 8 /**< ABI version */
188 #define EI_PAD 9 /**< Byte index of padding bytes */
190 /* object file type - page 1-3 (e_type) */
192 #define ET_NONE 0 /**< no file type */
193 #define ET_REL 1 /**< relocatable file */
194 #define ET_EXEC 2 /**< executable file */
195 #define ET_DYN 3 /**< shared object file */
196 #define ET_CORE 4 /**< core file */
197 #define ET_LOPROC 0xff00 /**< processor-specific */
198 #define ET_HIPROC 0xffff /**< processor-specific */
200 /* required architecture - page 1-4 (e_machine) */
202 #define EM_NONE 0 /**< no machine */
203 #define EM_M32 1 /**< AT&T WE 32100 */
204 #define EM_SPARC 2 /**< SPARC */
205 #define EM_386 3 /**< Intel 80386 */
206 #define EM_68K 4 /**< Motorola 68000 */
207 #define EM_88K 5 /**< Motorola 88000 */
208 #define EM_860 7 /**< Intel 80860 */
209 #define EM_MIPS 8 /**< MIPS RS3000 big-endian */
210 #define EM_MIPS_RS4_BE 10 /**< MIPS RS4000 big-endian */
211 #define EM_SPARC64 11 /**< SPARC 64-bit */
212 #define EM_PARISC 15 /**< HP PA-RISC */
213 #define EM_VPP500 17 /**< Fujitsu VPP500 */
214 #define EM_SPARC32PLUS 18 /**< Sun's V8plus */
215 #define EM_960 19 /**< Intel 80960 */
216 #define EM_PPC 20 /**< PowerPC */
217 #define EM_V800 36 /**< NEC V800 */
218 #define EM_FR20 37 /**< Fujitsu FR20 */
219 #define EM_RH32 38 /**< TRW RH-32 */
220 #define EM_RCE 39 /**< Motorola RCE */
221 #define EM_ARM 40 /**< Advanced RISC Machines ARM */
222 #define EM_ALPHA 41 /**< Digital Alpha */
223 #define EM_SH 42 /**< Hitachi SuperH */
224 #define EM_SPARCV9 43 /**< SPARC v9 64-bit */
225 #define EM_TRICORE 44 /**< Siemens Tricore embedded processor */
226 #define EM_ARC 45 /**< Argonaut RISC Core, Argonaut Techn Inc. */
227 #define EM_H8_300 46 /**< Hitachi H8/300 */
228 #define EM_H8_300H 47 /**< Hitachi H8/300H */
229 #define EM_H8S 48 /**< Hitachi H8/S */
230 #define EM_H8_500 49 /**< Hitachi H8/500 */
231 #define EM_IA_64 50 /**< HP/Intel IA-64 */
232 #define EM_MIPS_X 51 /**< Stanford MIPS-X */
233 #define EM_COLDFIRE 52 /**< Motorola Coldfire */
234 #define EM_68HC12 53 /**< Motorola M68HC12 */
238 #define EM_ALPHA 0x9026 /* interium value used by Linux until the
239 committee comes up with a final number */
240 #define EM_S390 0xA390 /* interium value used for IBM S390 */
243 /* object file version - page 1-4 (e_version) */
245 #define EV_NONE 0 /**< Invalid version */
246 #define EV_CURRENT 1 /**< Current version */
248 /* e_ident[] Identification Indexes - figure 1-4, page 1-5 */
250 #define EI_MAG0 0 /**< file id */
251 #define EI_MAG1 1 /**< file id */
252 #define EI_MAG2 2 /**< file id */
253 #define EI_MAG3 3 /**< file id */
254 #define EI_CLASS 4 /**< file class */
255 #define EI_DATA 5 /**< data encoding */
256 #define EI_VERSION 6 /**< file version */
257 #define EI_OSABI 7 /**< Operating system / ABI identification */
258 #define EI_ABIVERSION 8 /**< ABI version */
259 #define EI_PAD 9 /**< start of padding bytes */
261 /* magic number - page 1-5 */
263 #define ELFMAG0 0x7f /**< e_ident[EI_MAG0] */
264 #define ELFMAG1 'E' /**< e_ident[EI_MAG1] */
265 #define ELFMAG2 'L' /**< e_ident[EI_MAG2] */
266 #define ELFMAG3 'F' /**< e_ident[EI_MAG3] */
268 /* file class or capacity - page 1-6 */
270 #define ELFCLASSNONE 0 /**< Invalid class */
271 #define ELFCLASSS32 1 /**< 32-bit object */
272 #define ELFCLASSS64 2 /**< 64-bit object */
274 /* data encoding - page 1-6 */
276 #define ELFDATANONE 0 /**< invalid data encoding */
277 #define ELFDATA2LSB 1 /**< 0x01020304 => [ 0x04|0x03|0x02|0x01 ] */
278 #define ELFDATA2MSB 2 /**< 0x01020304 => [ 0x01|0x02|0x03|0x04 ] */
280 /* Identify operating system and ABI to which the object is targeted */
282 #define ELFOSABI_SYSV 0 /**< UNIX System V ABI (this specification) */
283 #define ELFOSABI_HPUX 1 /**< HP-UX operating system */
284 #define ELFOSABI_STANDALONE 255 /**< Standalone (embedded) application */
287 /***********************/
288 /* Sections - page 1-8 */
289 /***********************/
291 /* special section indexes */
293 #define SHN_UNDEF 0 /**< undefined section header entry */
294 #define SHN_LORESERVE 0xff00 /**< lower bound of reserved indexes */
295 #define SHN_LOPROC 0xff00 /**< lower bound of proc spec entr */
296 #define SHN_HIPROC 0xff1f /**< upper bound of proc spec entr */
297 #define SHN_ABS 0xfff1 /**< absolute values for ref */
298 #define SHN_COMMON 0xfff2 /**< common symbols */
299 #define SHN_HIRESERVE 0xffff /**< upper bound of reserved indexes */
301 /** ELF32 section header - figure 1-9, page 1-9 */
303 Elf32_Word sh_name; /**< name of sect (idx into strtab) */
304 Elf32_Word sh_type; /**< section's type */
305 Elf32_Word sh_flags; /**< section's flags */
306 Elf32_Addr sh_addr; /**< memory address of section */
307 Elf32_Off sh_offset; /**< file offset of section */
308 Elf32_Word sh_size; /**< file size of section */
309 Elf32_Word sh_link; /**< idx to associated header section */
310 Elf32_Word sh_info; /**< extra info of header section */
311 Elf32_Word sh_addralign; /**< address alignment constraints */
312 Elf32_Word sh_entsize; /**< size of entry if sect is table */
315 /** ELF64 section header */
317 Elf64_Word sh_name; /**< name of sect (idx into strtab) */
318 Elf64_Word sh_type; /**< section's type */
319 Elf64_Xword sh_flags; /**< section's flags */
320 Elf64_Addr sh_addr; /**< memory address of section */
321 Elf64_Off sh_offset; /**< file offset of section */
322 Elf64_Xword sh_size; /**< file size of section */
323 Elf64_Word sh_link; /**< idx to associated header section */
324 Elf64_Word sh_info; /**< extra info of header section */
325 Elf64_Xword sh_addralign; /**< address alignment constraints */
326 Elf64_Xword sh_entsize; /**< size of entry if sect is table */
329 /* section type - figure 1-10, page 1-10 */
332 #define SHT_PROGBITS 1
337 #define SHT_DYNAMIC 6
342 #define SHT_DYNSYM 11
343 #define SHT_INIT_ARRAY 14 /**< Array of constructors */
344 #define SHT_FINI_ARRAY 15 /**< Array of destructors */
345 #define SHT_PREINIT_ARRAY 16 /**< Array of pre-constructors */
346 #define SHT_GROUP 17 /**< Section group */
347 #define SHT_SYMTAB_SHNDX 18 /**< Extended section indeces */
348 #define SHT_NUM 19 /**< Number of defined types. */
349 #define SHT_LOOS 0x60000000
350 #define SHT_HIOS 0x6fffffff
351 #define SHT_LOPROC 0x70000000
352 #define SHT_HIPROC 0x7fffffff
353 #define SHT_LOUSER 0x80000000
354 #define SHT_HIUSER 0xffffffff
356 /* section attribute flags - page 1-12, figure 1-12 */
358 #define SHF_WRITE 0x1 /**< writeable during execution */
359 #define SHF_ALLOC 0x2 /**< section occupies virt memory */
360 #define SHF_EXECINSTR 0x4 /**< code section */
361 #define SHF_MERGE 0x10 /**< Might be merged */
362 #define SHF_STRINGS 0x20 /**< Contains nul-terminated strings */
363 #define SHF_INFO_LINK 0x40 /**< `sh_info' contains SHT index */
364 #define SHF_LINK_ORDER 0x80 /**< Preserve order after combining */
365 #define SHF_OS_NONCONFORMING 0x100 /**< Non-standard OS specific handling
367 #define SHF_GROUP 0x200 /**< Section is member of a group. */
368 #define SHF_TLS 0x400 /**< Section hold thread-local data. */
369 #define SHF_MASKOS 0x0ff00000 /**< OS-specific. */
370 #define SHF_MASKPROC 0xf0000000 /**< proc spec mask */
373 /*****************************************/
374 /* Program Header - figure 2-1, page 2-2 */
375 /*****************************************/
377 /** ELF32 program header */
379 Elf32_Word p_type; /**< type of program section */
380 Elf32_Off p_offset; /**< file offset of program section */
381 Elf32_Addr p_vaddr; /**< memory address of prog section */
382 Elf32_Addr p_paddr; /**< physical address (ignored) */
383 Elf32_Word p_filesz; /**< file size of program section */
384 Elf32_Word p_memsz; /**< memory size of program section */
385 Elf32_Word p_flags; /**< flags */
386 Elf32_Word p_align; /**< alignment of section */
389 /** ELF64 program header */
391 Elf64_Word p_type; /**< type of program section */
392 Elf64_Word p_flags; /**< flags */
393 Elf64_Off p_offset; /**< file offset of program section */
394 Elf64_Addr p_vaddr; /**< memory address of prog section */
395 Elf64_Addr p_paddr; /**< physical address (ignored) */
396 Elf64_Xword p_filesz; /**< file size of program section */
397 Elf64_Xword p_memsz; /**< memory size of program section */
398 Elf64_Xword p_align; /**< alignment of section */
401 /* segment types - figure 2-2, page 2-3 */
403 #define PT_NULL 0 /**< array is unused */
404 #define PT_LOAD 1 /**< loadable */
405 #define PT_DYNAMIC 2 /**< dynamic linking information */
406 #define PT_INTERP 3 /**< path to interpreter */
407 #define PT_NOTE 4 /**< auxiliary information */
408 #define PT_SHLIB 5 /**< reserved */
409 #define PT_PHDR 6 /**< location of the pht itself */
410 #define PT_TLS 7 /**< Thread-local storage segment */
411 #define PT_NUM 8 /**< Number of defined types */
412 #define PT_LOOS 0x60000000 /**< os spec. */
413 #define PT_HIOS 0x6fffffff /**< os spec. */
414 #define PT_LOPROC 0x70000000 /**< processor spec. */
415 #define PT_HIPROC 0x7fffffff /**< processor spec. */
417 #define PT_GNU_EH_FRAME (PT_LOOS + 0x474e550) /**< EH frame information. */
418 #define PT_GNU_STACK (PT_LOOS + 0x474e551) /**< Flags for stack. */
419 #define PT_GNU_RELRO (PT_LOOS + 0x474e552) /**< Read only after reloc. */
421 #define PT_L4_STACK (PT_LOOS + 0x12) /**< Address of the stack. */
422 #define PT_L4_KIP (PT_LOOS + 0x13) /**< Address of the KIP. */
423 #define PT_L4_AUX (PT_LOOS + 0x14) /**< Address of the AUX strcutures. */
425 /* segment permissions - page 2-3 */
430 #define PF_MASKOS 0x0ff00000
431 #define PF_MASKPROC 0x7fffffff
433 /* Legal values for note segment descriptor types for core files. */
435 #define NT_PRSTATUS 1 /**< Contains copy of prstatus struct */
436 #define NT_FPREGSET 2 /**< Contains copy of fpregset struct */
437 #define NT_PRPSINFO 3 /**< Contains copy of prpsinfo struct */
438 #define NT_PRXREG 4 /**< Contains copy of prxregset struct */
439 #define NT_TASKSTRUCT 4 /**< Contains copy of task structure */
440 #define NT_PLATFORM 5 /**< String from sysinfo(SI_PLATFORM) */
441 #define NT_AUXV 6 /**< Contains copy of auxv array */
442 #define NT_GWINDOWS 7 /**< Contains copy of gwindows struct */
443 #define NT_ASRS 8 /**< Contains copy of asrset struct */
444 #define NT_PSTATUS 10 /**< Contains copy of pstatus struct */
445 #define NT_PSINFO 13 /**< Contains copy of psinfo struct */
446 #define NT_PRCRED 14 /**< Contains copy of prcred struct */
447 #define NT_UTSNAME 15 /**< Contains copy of utsname struct */
448 #define NT_LWPSTATUS 16 /**< Contains copy of lwpstatus struct */
449 #define NT_LWPSINFO 17 /**< Contains copy of lwpinfo struct */
450 #define NT_PRFPXREG 20 /**< Contains copy of fprxregset struct*/
452 /* Legal values for the note segment descriptor types for object files. */
454 #define NT_VERSION 1 /**< Contains a version string. */
456 /* Dynamic structure - figure 2-9, page 2-12 */
458 /** ELF32 dynamic entry */
460 Elf32_Sword d_tag; /**< see DT_ values */
462 Elf32_Word d_val; /**< integer values with various interpret. */
463 Elf32_Addr d_ptr; /**< program virtual addresses */
467 /** ELF64 dynamic entry */
469 Elf64_Sxword d_tag; /**< see DT_ values */
471 Elf64_Xword d_val; /**< integer values with various interpret. */
472 Elf64_Addr d_ptr; /**< program virtual addresses */
476 /** Dynamic Array Tags, d_tag - figure 2-10, page 2-12 */
478 #define DT_NULL 0 /**< end of _DYNAMIC array */
479 #define DT_NEEDED 1 /**< name of a needed library */
480 #define DT_PLTRELSZ 2 /**< total size of relocation entry */
481 #define DT_PLTGOT 3 /**< address assoc with prog link table */
482 #define DT_HASH 4 /**< address of symbol hash table */
483 #define DT_STRTAB 5 /**< address of string table */
484 #define DT_SYMTAB 6 /**< address of symbol table */
485 #define DT_RELA 7 /**< address of relocation table */
486 #define DT_RELASZ 8 /**< total size of relocation table */
487 #define DT_RELAENT 9 /**< size of DT_RELA relocation entry */
488 #define DT_STRSZ 10 /**< size of the string table */
489 #define DT_SYMENT 11 /**< size of a symbol table entry */
490 #define DT_INIT 12 /**< address of initialization function */
491 #define DT_FINI 13 /**< address of termination function */
492 #define DT_SONAME 14 /**< name of the shared object */
493 #define DT_RPATH 15 /**< search library path */
494 #define DT_SYMBOLIC 16 /**< alter symbol resolution algorithm */
495 #define DT_REL 17 /**< address of relocation table */
496 #define DT_RELSZ 18 /**< total size of DT_REL relocation table */
497 #define DT_RELENT 19 /**< size of the DT_REL relocation entry */
498 #define DT_PTRREL 20 /**< type of relocation entry */
499 #define DT_DEBUG 21 /**< for debugging purposes */
500 #define DT_TEXTREL 22 /**< at least on entry changes r/o section */
501 #define DT_JMPREL 23 /**< address of relocation entries */
502 #define DT_BIND_NOW 24 /**< Process relocations of object */
503 #define DT_INIT_ARRAY 25 /**< Array with addresses of init fct */
504 #define DT_FINI_ARRAY 26 /**< Array with addresses of fini fct */
505 #define DT_INIT_ARRAYSZ 27 /**< Size in bytes of DT_INIT_ARRAY */
506 #define DT_FINI_ARRAYSZ 28 /**< Size in bytes of DT_FINI_ARRAY */
507 #define DT_RUNPATH 29 /**< Library search path */
508 #define DT_FLAGS 30 /**< Flags for the object being loaded */
509 #define DT_ENCODING 32 /**< Start of encoded range */
510 #define DT_PREINIT_ARRAY 32 /**< Array with addresses of preinit fct*/
511 #define DT_PREINIT_ARRAYSZ 33 /**< size in bytes of DT_PREINIT_ARRAY */
512 #define DT_NUM 34 /**< Number used */
513 #define DT_LOOS 0x6000000d /**< Start of OS-specific */
514 #define DT_HIOS 0x6ffff000 /**< End of OS-specific */
515 #define DT_LOPROC 0x70000000 /**< processor spec. */
516 #define DT_HIPROC 0x7fffffff /**< processor spec. */
518 /* Values of `d_un.d_val' in the DT_FLAGS entry. */
519 #define DF_ORIGIN 0x00000001 /**< Object may use DF_ORIGIN */
520 #define DF_SYMBOLIC 0x00000002 /**< Symbol resolutions starts here */
521 #define DF_TEXTREL 0x00000004 /**< Object contains text relocations */
522 #define DF_BIND_NOW 0x00000008 /**< No lazy binding for this object */
523 #define DF_STATIC_TLS 0x00000010 /**< Module uses the static TLS model */
525 /* State flags selectable in the `d_un.d_val' element of the DT_FLAGS_1
526 entry in the dynamic section. */
527 #define DF_1_NOW 0x00000001 /**< Set RTLD_NOW for this object. */
528 #define DF_1_GLOBAL 0x00000002 /**< Set RTLD_GLOBAL for this object. */
529 #define DF_1_GROUP 0x00000004 /**< Set RTLD_GROUP for this object. */
530 #define DF_1_NODELETE 0x00000008 /**< Set RTLD_NODELETE for this object.*/
531 #define DF_1_LOADFLTR 0x00000010 /**< Trigger filtee loading at runtime.*/
532 #define DF_1_INITFIRST 0x00000020 /**< Set RTLD_INITFIRST for this object*/
533 #define DF_1_NOOPEN 0x00000040 /**< Set RTLD_NOOPEN for this object. */
534 #define DF_1_ORIGIN 0x00000080 /**< $ORIGIN must be handled. */
535 #define DF_1_DIRECT 0x00000100 /**< Direct binding enabled. */
536 #define DF_1_TRANS 0x00000200
537 #define DF_1_INTERPOSE 0x00000400 /**< Object is used to interpose. */
538 #define DF_1_NODEFLIB 0x00000800 /**< Ignore default lib search path. */
539 #define DF_1_NODUMP 0x00001000 /**< Object can't be dldump'ed. */
540 #define DF_1_CONFALT 0x00002000 /**< Configuration alternative created.*/
541 #define DF_1_ENDFILTEE 0x00004000 /**< Filtee terminates filters search. */
542 #define DF_1_DISPRELDNE 0x00008000 /**< Disp reloc applied at build time. */
543 #define DF_1_DISPRELPND 0x00010000 /**< Disp reloc applied at run-time. */
545 /* Flags for the feature selection in DT_FEATURE_1. */
546 #define DTF_1_PARINIT 0x00000001
547 #define DTF_1_CONFEXP 0x00000002
549 /* Flags in the DT_POSFLAG_1 entry effecting only the next DT_* entry. */
550 #define DF_P1_LAZYLOAD 0x00000001 /**< Lazyload following object. */
551 #define DF_P1_GROUPPERM 0x00000002 /**< Symbols from next object are not
552 generally available. */
554 /* Relocation - page 1-21, figure 1-20 */
564 Elf32_Sword r_addend;
575 Elf64_Sxword r_addend;
578 #define ELF32_R_SYM(i) ((i)>>8)
579 #define ELF32_R_TYPE(i) ((unsigned char)(i))
580 #define ELF32_R_INFO(s,t) (((s)<<8)+(unsigned char)(t))
582 #define ELF64_R_SYM(i) ((i)>>32)
583 #define ELF64_R_TYPE(i) ((i)&0xffffffffL)
584 #define ELF64_R_INFO(s,t) (((s)<<32)+(t)&0xffffffffL)
586 /* Relocation types (processor specific) - page 1-23, figure 1-22 */
588 #define R_386_NONE 0 /**< none */
589 #define R_386_32 1 /**< S + A */
590 #define R_386_PC32 2 /**< S + A - P */
591 #define R_386_GOT32 3 /**< G + A - P */
592 #define R_386_PLT32 4 /**< L + A - P */
593 #define R_386_COPY 5 /**< none */
594 #define R_386_GLOB_DAT 6 /**< S */
595 #define R_386_JMP_SLOT 7 /**< S */
596 #define R_386_RELATIVE 8 /**< B + A */
597 #define R_386_GOTOFF 9 /**< S + A - GOT */
598 #define R_386_GOTPC 10 /**< GOT + A - P */
599 #define R_386_32PLT 11
600 #define R_386_TLS_TPOFF 14 /* Offset in static TLS block */
601 #define R_386_TLS_IE 15 /* Address of GOT entry for static TLS
603 #define R_386_TLS_GOTIE 16 /* GOT entry for static TLS block
605 #define R_386_TLS_LE 17 /* Offset relative to static TLS
607 #define R_386_TLS_GD 18 /* Direct 32 bit for GNU version of
608 general dynamic thread local data */
609 #define R_386_TLS_LDM 19 /* Direct 32 bit for GNU version of
610 local dynamic thread local data
613 #define R_386_PC16 21
616 #define R_386_TLS_GD_32 24 /* Direct 32 bit for general dynamic
618 #define R_386_TLS_GD_PUSH 25 /* Tag for pushl in GD TLS code */
619 #define R_386_TLS_GD_CALL 26 /* Relocation for call to
621 #define R_386_TLS_GD_POP 27 /* Tag for popl in GD TLS code */
622 #define R_386_TLS_LDM_32 28 /* Direct 32 bit for local dynamic
623 thread local data in LE code */
624 #define R_386_TLS_LDM_PUSH 29 /* Tag for pushl in LDM TLS code */
625 #define R_386_TLS_LDM_CALL 30 /* Relocation for call to
626 __tls_get_addr() in LDM code */
627 #define R_386_TLS_LDM_POP 31 /* Tag for popl in LDM TLS code */
628 #define R_386_TLS_LDO_32 32 /* Offset relative to TLS block */
629 #define R_386_TLS_IE_32 33 /* GOT entry for negated static TLS
631 #define R_386_TLS_LE_32 34 /* Negated offset relative to static
633 #define R_386_TLS_DTPMOD32 35 /* ID of module containing symbol */
634 #define R_386_TLS_DTPOFF32 36 /* Offset in TLS block */
635 #define R_386_TLS_TPOFF32 37 /* Negated offset in static TLS block */
636 /* Keep this the last entry. */
639 /* ARM specific declarations */
641 /* Processor specific flags for the ELF header e_flags field. */
642 #define EF_ARM_RELEXEC 0x01
643 #define EF_ARM_HASENTRY 0x02
644 #define EF_ARM_INTERWORK 0x04
645 #define EF_ARM_APCS_26 0x08
646 #define EF_ARM_APCS_FLOAT 0x10
647 #define EF_ARM_PIC 0x20
648 #define EF_ARM_ALIGN8 0x40 /* 8-bit structure alignment is in use */
649 #define EF_ARM_NEW_ABI 0x80
650 #define EF_ARM_OLD_ABI 0x100
652 /* Other constants defined in the ARM ELF spec. version B-01. */
653 /* NB. These conflict with values defined above. */
654 #define EF_ARM_SYMSARESORTED 0x04
655 #define EF_ARM_DYNSYMSUSESEGIDX 0x08
656 #define EF_ARM_MAPSYMSFIRST 0x10
657 #define EF_ARM_EABIMASK 0XFF000000
659 #define EF_ARM_EABI_VERSION(flags) ((flags) & EF_ARM_EABIMASK)
660 #define EF_ARM_EABI_UNKNOWN 0x00000000
661 #define EF_ARM_EABI_VER1 0x01000000
662 #define EF_ARM_EABI_VER2 0x02000000
664 /* Additional symbol types for Thumb */
665 #define STT_ARM_TFUNC 0xd
667 /* ARM-specific values for sh_flags */
668 #define SHF_ARM_ENTRYSECT 0x10000000 /* Section contains an entry point */
669 #define SHF_ARM_COMDEF 0x80000000 /* Section may be multiply defined
670 in the input to a link step */
672 /* ARM-specific program header flags */
673 #define PF_ARM_SB 0x10000000 /* Segment contains the location
674 addressed by the static base */
677 #define R_ARM_NONE 0 /* No reloc */
678 #define R_ARM_PC24 1 /* PC relative 26 bit branch */
679 #define R_ARM_ABS32 2 /* Direct 32 bit */
680 #define R_ARM_REL32 3 /* PC relative 32 bit */
682 #define R_ARM_ABS16 5 /* Direct 16 bit */
683 #define R_ARM_ABS12 6 /* Direct 12 bit */
684 #define R_ARM_THM_ABS5 7
685 #define R_ARM_ABS8 8 /* Direct 8 bit */
686 #define R_ARM_SBREL32 9
687 #define R_ARM_THM_PC22 10
688 #define R_ARM_THM_PC8 11
689 #define R_ARM_AMP_VCALL9 12
690 #define R_ARM_SWI24 13
691 #define R_ARM_THM_SWI8 14
692 #define R_ARM_XPC25 15
693 #define R_ARM_THM_XPC22 16
694 #define R_ARM_COPY 20 /* Copy symbol at runtime */
695 #define R_ARM_GLOB_DAT 21 /* Create GOT entry */
696 #define R_ARM_JUMP_SLOT 22 /* Create PLT entry */
697 #define R_ARM_RELATIVE 23 /* Adjust by program base */
698 #define R_ARM_GOTOFF 24 /* 32 bit offset to GOT */
699 #define R_ARM_GOTPC 25 /* 32 bit PC relative offset to GOT */
700 #define R_ARM_GOT32 26 /* 32 bit GOT entry */
701 #define R_ARM_PLT32 27 /* 32 bit PLT address */
702 #define R_ARM_ALU_PCREL_7_0 32
703 #define R_ARM_ALU_PCREL_15_8 33
704 #define R_ARM_ALU_PCREL_23_15 34
705 #define R_ARM_LDR_SBREL_11_0 35
706 #define R_ARM_ALU_SBREL_19_12 36
707 #define R_ARM_ALU_SBREL_27_20 37
708 #define R_ARM_GNU_VTENTRY 100
709 #define R_ARM_GNU_VTINHERIT 101
710 #define R_ARM_THM_PC11 102 /* thumb unconditional branch */
711 #define R_ARM_THM_PC9 103 /* thumb conditional branch */
712 #define R_ARM_RXPC25 249
713 #define R_ARM_RSBREL32 250
714 #define R_ARM_THM_RPC22 251
715 #define R_ARM_RREL32 252
716 #define R_ARM_RABS22 253
717 #define R_ARM_RPC24 254
718 #define R_ARM_RBASE 255
719 /* Keep this the last entry. */
720 #define R_ARM_NUM 256
722 /* AMD x86-64 relocations. */
723 #define R_X86_64_NONE 0 /* No reloc */
724 #define R_X86_64_64 1 /* Direct 64 bit */
725 #define R_X86_64_PC32 2 /* PC relative 32 bit signed */
726 #define R_X86_64_GOT32 3 /* 32 bit GOT entry */
727 #define R_X86_64_PLT32 4 /* 32 bit PLT address */
728 #define R_X86_64_COPY 5 /* Copy symbol at runtime */
729 #define R_X86_64_GLOB_DAT 6 /* Create GOT entry */
730 #define R_X86_64_JUMP_SLOT 7 /* Create PLT entry */
731 #define R_X86_64_RELATIVE 8 /* Adjust by program base */
732 #define R_X86_64_GOTPCREL 9 /* 32 bit signed PC relative
734 #define R_X86_64_32 10 /* Direct 32 bit zero extended */
735 #define R_X86_64_32S 11 /* Direct 32 bit sign extended */
736 #define R_X86_64_16 12 /* Direct 16 bit zero extended */
737 #define R_X86_64_PC16 13 /* 16 bit sign extended pc relative */
738 #define R_X86_64_8 14 /* Direct 8 bit sign extended */
739 #define R_X86_64_PC8 15 /* 8 bit sign extended pc relative */
740 #define R_X86_64_DTPMOD64 16 /* ID of module containing symbol */
741 #define R_X86_64_DTPOFF64 17 /* Offset in module's TLS block */
742 #define R_X86_64_TPOFF64 18 /* Offset in initial TLS block */
743 #define R_X86_64_TLSGD 19 /* 32 bit signed PC relative offset
744 to two GOT entries for GD symbol */
745 #define R_X86_64_TLSLD 20 /* 32 bit signed PC relative offset
746 to two GOT entries for LD symbol */
747 #define R_X86_64_DTPOFF32 21 /* Offset in TLS block */
748 #define R_X86_64_GOTTPOFF 22 /* 32 bit signed PC relative offset
749 to GOT entry for IE symbol */
750 #define R_X86_64_TPOFF32 23 /* Offset in initial TLS block */
752 #define R_X86_64_NUM 24
754 /* Symbol Table Entry - page 1-17, figure 1-16 */
758 /** ELF32 symbol table entry */
760 Elf32_Word st_name; /**< name of symbol (idx symstrtab) */
761 Elf32_Addr st_value; /**< value of associated symbol */
762 Elf32_Word st_size; /**< size of associated symbol */
763 unsigned char st_info; /**< type and binding info */
764 unsigned char st_other; /**< undefined */
765 Elf32_Half st_shndx; /**< associated section header */
768 /** ELF64 symbol table entry */
770 Elf64_Word st_name; /**< name of symbol (idx symstrtab) */
771 unsigned char st_info; /**< type and binding info */
772 unsigned char st_other; /**< undefined */
773 Elf64_Half st_shndx; /**< associated section header */
774 Elf64_Addr st_value; /**< value of associated symbol */
775 Elf64_Xword st_size; /**< size of associated symbol */
778 #define ELF32_ST_BIND(i) ((i)>>4)
779 #define ELF32_ST_TYPE(i) ((i)&0xf)
780 #define ELF32_ST_INFO(b,t) (((b)<<4)+((t)&0xf))
782 #define ELF64_ST_BIND(i) ((i)>>4)
783 #define ELF64_ST_TYPE(i) ((i)&0xf)
784 #define ELF64_ST_INFO(b,t) (((b)<<4)+((t)&0xf))
786 /* Symbol Binding - page 1-18, figure 1-17 */
788 #define STB_LOCAL 0 /**< not visible outside object file */
789 #define STB_GLOBAL 1 /**< visible to all objects beeing combined */
790 #define STB_WEAK 2 /**< resemble global symbols */
791 #define STB_LOOS 10 /**< os specific */
792 #define STB_HIOS 12 /**< os specific */
793 #define STB_LOPROC 13 /**< proc specific */
794 #define STB_HIPROC 15 /**< proc specific */
796 /* Symbol Types - page 1-19, figure 1-18 */
798 #define STT_NOTYPE 0 /**< symbol's type not specified */
799 #define STT_OBJECT 1 /**< associated with a data object */
800 #define STT_FUNC 2 /**< associated with a function or other code */
801 #define STT_SECTION 3 /**< associated with a section */
802 #define STT_FILE 4 /**< source file name associated with object */
803 #define STT_LOOS 10 /**< os specific */
804 #define STT_HIOS 12 /**< os specific */
805 #define STT_LOPROC 13 /**< proc specific */
806 #define STT_HIPROC 15 /**< proc specific */
830 typedef struct Elf32_Auxv
836 typedef struct Elf64_Auxv
843 static inline int l4util_elf_check_magic(ElfW(Ehdr) *hdr);
844 static inline int l4util_elf_check_arch(ElfW(Ehdr) *hdr);
845 static inline ElfW(Phdr) *l4util_elf_phdr(ElfW(Ehdr) *hdr);
850 int l4util_elf_check_magic(ElfW(Ehdr) *hdr)
852 return hdr->e_ident[EI_MAG0] == ELFMAG0
853 && hdr->e_ident[EI_MAG1] == ELFMAG1
854 && hdr->e_ident[EI_MAG2] == ELFMAG2
855 && hdr->e_ident[EI_MAG3] == ELFMAG3;
859 int l4util_elf_check_arch(ElfW(Ehdr) *hdr)
861 return hdr->e_ident[EI_CLASS] == L4_ARCH_EI_CLASS
862 && hdr->e_ident[EI_DATA] == L4_ARCH_EI_DATA
863 && hdr->e_machine == L4_ARCH_E_MACHINE;
867 ElfW(Phdr) *l4util_elf_phdr(ElfW(Ehdr) *hdr)
869 return (ElfW(Phdr) *)((char *)hdr + hdr->e_phoff);
873 #endif /* _L4_EXEC_ELF_H */