1 #ifndef CYGONCE_LOADER_ELF_H
2 #define CYGONCE_LOADER_ELF_H
4 //==========================================================================
8 // ELF file format definitions
10 //==========================================================================
11 //####ECOSGPLCOPYRIGHTBEGIN####
12 // -------------------------------------------
13 // This file is part of eCos, the Embedded Configurable Operating System.
14 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
16 // eCos is free software; you can redistribute it and/or modify it under
17 // the terms of the GNU General Public License as published by the Free
18 // Software Foundation; either version 2 or (at your option) any later version.
20 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
21 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
22 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
25 // You should have received a copy of the GNU General Public License along
26 // with eCos; if not, write to the Free Software Foundation, Inc.,
27 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
29 // As a special exception, if other files instantiate templates or use macros
30 // or inline functions from this file, or you compile this file and link it
31 // with other works to produce a work based on this file, this file does not
32 // by itself cause the resulting work to be covered by the GNU General Public
33 // License. However the source code for this file must still be made available
34 // in accordance with section (3) of the GNU General Public License.
36 // This exception does not invalidate any other reasons why a work based on
37 // this file might be covered by the GNU General Public License.
39 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
40 // at http://sources.redhat.com/ecos/ecos-license/
41 // -------------------------------------------
42 //####ECOSGPLCOPYRIGHTEND####
43 //==========================================================================
44 //#####DESCRIPTIONBEGIN####
47 // Contributors: nickg
49 // Purpose: Define ELF file format
50 // Description: The types defined here describe the ELF file format.
52 // Usage: #include <cyg/loader/elf.h>
54 //####DESCRIPTIONEND####
56 //==========================================================================
58 // Quite a lot of this file was taken from the BSD exec_elf.h header file.
59 // Hence we should show you this...
61 /* $OpenBSD: exec_elf.h,v 1.20 1999/09/19 16:16:49 kstailey Exp $ */
63 * Copyright (c) 1995, 1996 Erik Theisen. All rights reserved.
65 * Redistribution and use in source and binary forms, with or without
66 * modification, are permitted provided that the following conditions
68 * 1. Redistributions of source code must retain the above copyright
69 * notice, this list of conditions and the following disclaimer.
70 * 2. Redistributions in binary form must reproduce the above copyright
71 * notice, this list of conditions and the following disclaimer in the
72 * documentation and/or other materials provided with the distribution.
73 * 3. The name of the author may not be used to endorse or promote products
74 * derived from this software without specific prior written permission
76 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
77 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
78 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
79 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
80 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
81 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
82 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
83 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
84 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
85 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
87 //==========================================================================
89 #include <cyg/infra/cyg_type.h>
91 // -------------------------------------------------------------------------
94 typedef cyg_uint32 Elf32_Addr;
95 typedef cyg_uint32 Elf32_Off;
96 typedef cyg_uint16 Elf32_Half;
97 typedef cyg_uint32 Elf32_Word;
98 typedef cyg_int32 Elf32_Sword;
100 typedef cyg_uint64 Elf64_Addr;
101 typedef cyg_uint64 Elf64_Off;
102 typedef cyg_uint16 Elf64_Half;
103 typedef cyg_uint32 Elf64_Word;
104 typedef cyg_int32 Elf64_Sword;
105 typedef cyg_uint64 Elf64_Xword;
106 typedef cyg_int64 Elf64_Sxword;
108 // -------------------------------------------------------------------------
114 unsigned char e_ident[EI_NIDENT];
116 Elf32_Half e_machine;
117 Elf32_Word e_version;
123 Elf32_Half e_phentsize;
125 Elf32_Half e_shentsize;
127 Elf32_Half e_shtrndx;
131 unsigned char e_ident[EI_NIDENT];
133 Elf64_Half e_machine;
134 Elf64_Word e_version;
140 Elf64_Half e_phentsize;
142 Elf64_Half e_shentsize;
144 Elf64_Half e_shtrndx;
147 // -------------------------------------------------------------------------
148 /* e_ident[] identification indexes */
150 #define EI_MAG0 0 /* file ID */
151 #define EI_MAG1 1 /* file ID */
152 #define EI_MAG2 2 /* file ID */
153 #define EI_MAG3 3 /* file ID */
154 #define EI_CLASS 4 /* file class */
155 #define EI_DATA 5 /* data encoding */
156 #define EI_VERSION 6 /* ELF header version */
157 #define EI_OSABI 7 /* Operating system/ABI identification */
158 #define EI_ABIVERSION 8 /* ABI version */
159 #define EI_PAD 9 /* start of pad bytes */
161 // -------------------------------------------------------------------------
162 /* e_ident[] magic number */
164 #define ELFMAG0 0x7f /* e_ident[EI_MAG0] */
165 #define ELFMAG1 'E' /* e_ident[EI_MAG1] */
166 #define ELFMAG2 'L' /* e_ident[EI_MAG2] */
167 #define ELFMAG3 'F' /* e_ident[EI_MAG3] */
168 #define ELFMAG "\177ELF" /* magic */
169 #define SELFMAG 4 /* size of magic */
171 // -------------------------------------------------------------------------
172 /* e_ident[] file class */
174 #define ELFCLASSNONE 0 /* invalid */
175 #define ELFCLASS32 1 /* 32-bit objs */
176 #define ELFCLASS64 2 /* 64-bit objs */
177 #define ELFCLASSNUM 3 /* number of classes */
179 // -------------------------------------------------------------------------
180 /* e_ident[] data encoding */
182 #define ELFDATANONE 0 /* invalid */
183 #define ELFDATA2LSB 1 /* Little-Endian */
184 #define ELFDATA2MSB 2 /* Big-Endian */
185 #define ELFDATANUM 3 /* number of data encode defines */
187 // -------------------------------------------------------------------------
190 #define IS_ELF(ehdr) ((ehdr).e_ident[EI_MAG0] == ELFMAG0 && \
191 (ehdr).e_ident[EI_MAG1] == ELFMAG1 && \
192 (ehdr).e_ident[EI_MAG2] == ELFMAG2 && \
193 (ehdr).e_ident[EI_MAG3] == ELFMAG3)
195 // -------------------------------------------------------------------------
198 #define ET_NONE 0 /* No file type */
199 #define ET_REL 1 /* relocatable file */
200 #define ET_EXEC 2 /* executable file */
201 #define ET_DYN 3 /* shared object file */
202 #define ET_CORE 4 /* core file */
203 #define ET_NUM 5 /* number of types */
204 #define ET_LOOS 0xfe00 /* Operating system-specific */
205 #define ET_HIOS 0xfeff /* Operating system-specific */
206 #define ET_LOPROC 0xff00 /* reserved range for processor */
207 #define ET_HIPROC 0xffff /* specific e_type */
209 // -------------------------------------------------------------------------
211 // The following values taken from 22 June 2000 SysV ABI spec, updated with
212 // extra values from binutils elf/common.h.
214 #define EM_NONE 0 // No machine
215 #define EM_M32 1 // AT&T WE 32100
216 #define EM_SPARC 2 // SPARC
217 #define EM_386 3 // Intel 80386
218 #define EM_68K 4 // Motorola 68000
219 #define EM_88K 5 // Motorola 88000
220 #define EM_860 7 // Intel 80860
221 #define EM_MIPS 8 // MIPS I Architecture
222 #define EM_S370 9 // IBM System/370 Processor
223 #define EM_MIPS_RS3_LE 10 // MIPS RS3000 Little-endian
224 #define EM_PARISC 15 // Hewlett-Packard PA-RISC
225 #define EM_VPP500 17 // Fujitsu VPP500
226 #define EM_SPARC32PLUS 18 // Enhanced instruction set SPARC
227 #define EM_960 19 // Intel 80960
228 #define EM_PPC 20 // PowerPC
229 #define EM_PPC64 21 // 64-bit PowerPC
230 #define EM_V800 36 // NEC V800
231 #define EM_FR20 37 // Fujitsu FR20
232 #define EM_RH32 38 // TRW RH-32
233 #define EM_RCE 39 // Motorola RCE
234 #define EM_ARM 40 // Advanced RISC Machines ARM
235 #define EM_ALPHA 41 // Digital Alpha
236 #define EM_SH 42 // Hitachi SH
237 #define EM_SPARCV9 43 // SPARC Version 9
238 #define EM_TRICORE 44 // Siemens Tricore embedded processor
239 #define EM_ARC 45 // Argonaut RISC Core, Argonaut Technologies Inc.
240 #define EM_H8_300 46 // Hitachi H8/300
241 #define EM_H8_300H 47 // Hitachi H8/300H
242 #define EM_H8S 48 // Hitachi H8S
243 #define EM_H8_500 49 // Hitachi H8/500
244 #define EM_IA_64 50 // Intel IA-64 processor architecture
245 #define EM_MIPS_X 51 // Stanford MIPS-X
246 #define EM_COLDFIRE 52 // Motorola ColdFire
247 #define EM_68HC12 53 // Motorola M68HC12
248 #define EM_MMA 54 // Fujitsu MMA Multimedia Accelerator
249 #define EM_PCP 55 // Siemens PCP
250 #define EM_NCPU 56 // Sony nCPU embedded RISC processor
251 #define EM_NDR1 57 // Denso NDR1 microprocessor
252 #define EM_STARCORE 58 // Motorola Star*Core processor
253 #define EM_ME16 59 // Toyota ME16 processor
254 #define EM_ST100 60 // STMicroelectronics ST100 processor
255 #define EM_TINYJ 61 // Advanced Logic Corp. TinyJ embedded processor family
256 #define EM_FX66 66 // Siemens FX66 microcontroller
257 #define EM_ST9PLUS 67 // STMicroelectronics ST9+ 8/16 bit microcontroller
258 #define EM_ST7 68 // STMicroelectronics ST7 8-bit microcontroller
259 #define EM_68HC16 69 // Motorola MC68HC16 Microcontroller
260 #define EM_68HC11 70 // Motorola MC68HC11 Microcontroller
261 #define EM_68HC08 71 // Motorola MC68HC08 Microcontroller
262 #define EM_68HC05 72 // Motorola MC68HC05 Microcontroller
263 #define EM_SVX 73 // Silicon Graphics SVx
264 #define EM_ST19 74 // STMicroelectronics ST19 8-bit microcontroller
265 #define EM_VAX 75 // Digital VAX
266 #define EM_CRIS 76 // Axis Communications 32-bit embedded processor
267 #define EM_JAVELIN 77 // Infineon Technologies 32-bit embedded processor
268 #define EM_FIREPATH 78 // Element 14 64-bit DSP Processor
269 #define EM_ZSP 79 // LSI Logic 16-bit DSP Processor
270 #define EM_MMIX 80 // Donald Knuth's educational 64-bit processor
271 #define EM_HUANY 81 // Harvard University machine-independent object files
272 #define EM_PRISM 82 // SiTera Prism
274 /* Cygnus PowerPC ELF backend. Written in the absence of an ABI. */
275 #define EM_CYGNUS_POWERPC 0x9025
277 /* Old version of Sparc v9, from before the ABI; this should be
279 #define EM_OLD_SPARCV9 11
281 /* Old version of PowerPC, this should be removed shortly. */
282 #define EM_PPC_OLD 17
284 /* Cygnus ARC ELF backend. Written in the absence of an ABI. */
285 #define EM_CYGNUS_ARC 0x9040
287 /* Cygnus M32R ELF backend. Written in the absence of an ABI. */
288 #define EM_CYGNUS_M32R 0x9041
290 /* Alpha backend magic number. Written in the absence of an ABI. */
291 //#define EM_ALPHA 0x9026
293 /* D10V backend magic number. Written in the absence of an ABI. */
294 #define EM_CYGNUS_D10V 0x7650
296 /* D30V backend magic number. Written in the absence of an ABI. */
297 #define EM_CYGNUS_D30V 0x7676
299 /* V850 backend magic number. Written in the absense of an ABI. */
300 #define EM_CYGNUS_V850 0x9080
302 /* mn10200 and mn10300 backend magic numbers.
303 Written in the absense of an ABI. */
304 #define EM_CYGNUS_MN10200 0xdead
305 #define EM_CYGNUS_MN10300 0xbeef
307 /* FR30 magic number - no EABI available. */
308 #define EM_CYGNUS_FR30 0x3330
311 Written in the absense of an ABI. */
312 #define EM_AVR 0x1057
314 // -------------------------------------------------------------------------
317 #define EV_NONE 0 /* Invalid */
318 #define EV_CURRENT 1 /* Current */
319 #define EV_NUM 2 /* number of versions */
321 // -------------------------------------------------------------------------
325 Elf32_Word sh_name; /* name - index into section header
326 string table section */
327 Elf32_Word sh_type; /* type */
328 Elf32_Word sh_flags; /* flags */
329 Elf32_Addr sh_addr; /* address */
330 Elf32_Off sh_offset; /* file offset */
331 Elf32_Word sh_size; /* section size */
332 Elf32_Word sh_link; /* section header table index link */
333 Elf32_Word sh_info; /* extra information */
334 Elf32_Word sh_addralign; /* address alignment */
335 Elf32_Word sh_entsize; /* section entry size */
339 Elf64_Word sh_name; /* section name */
340 Elf64_Word sh_type; /* section type */
341 Elf64_Xword sh_flags; /* section flags */
342 Elf64_Addr sh_addr; /* virtual address */
343 Elf64_Off sh_offset; /* file offset */
344 Elf64_Xword sh_size; /* section size */
345 Elf64_Word sh_link; /* link to another */
346 Elf64_Word sh_info; /* misc info */
347 Elf64_Xword sh_addralign; /* memory alignment */
348 Elf64_Xword sh_entsize; /* table entry size */
351 // -------------------------------------------------------------------------
352 /* Special Section Indexes */
354 #define SHN_UNDEF 0 /* undefined */
355 #define SHN_LORESERVE 0xff00 /* lower bounds of reserved indexes */
356 #define SHN_LOPROC 0xff00 /* reserved range for processor */
357 #define SHN_HIPROC 0xff1f /* specific section indexes */
358 #define SHN_LOOS 0xff20 /* reserved range for operating */
359 #define SHN_HIOS 0xff3f /* system specific section indexes */
360 #define SHN_ABS 0xfff1 /* absolute value */
361 #define SHN_COMMON 0xfff2 /* common symbol */
362 #define SHN_XINDEX 0xffff /* escape value for oversize index */
363 #define SHN_HIRESERVE 0xffff /* upper bounds of reserved indexes */
365 // -------------------------------------------------------------------------
368 #define SHT_NULL 0 /* inactive */
369 #define SHT_PROGBITS 1 /* program defined information */
370 #define SHT_SYMTAB 2 /* symbol table section */
371 #define SHT_STRTAB 3 /* string table section */
372 #define SHT_RELA 4 /* relocation section with addends*/
373 #define SHT_HASH 5 /* symbol hash table section */
374 #define SHT_DYNAMIC 6 /* dynamic section */
375 #define SHT_NOTE 7 /* note section */
376 #define SHT_NOBITS 8 /* no space section */
377 #define SHT_REL 9 /* relation section without addends */
378 #define SHT_SHLIB 10 /* reserved - purpose unknown */
379 #define SHT_DYNSYM 11 /* dynamic symbol table section */
380 #define SHT_INIT_ARRAY 14 /* init procedure array */
381 #define SHT_FINI_ARRAY 15 /* fini procedure array */
382 #define SHT_PREINIT_ARRAY 16 /* preinit procedure array */
383 #define SHT_GROUP 17 /* section group */
384 #define SHT_SYMTAB_SHNDX 18 /* oversize index table */
385 #define SHT_NUM 19 /* number of section types */
386 #define SHT_LOOS 0x60000000 /* reserved range for O/S */
387 #define SHT_HIOS 0x6fffffff /* specific section header types */
388 #define SHT_LOPROC 0x70000000 /* reserved range for processor */
389 #define SHT_HIPROC 0x7fffffff /* specific section header types */
390 #define SHT_LOUSER 0x80000000 /* reserved range for application */
391 #define SHT_HIUSER 0xffffffff /* specific indexes */
393 // -------------------------------------------------------------------------
396 #define ELF_BSS ".bss" /* uninitialized data */
397 #define ELF_DATA ".data" /* initialized data */
398 #define ELF_DEBUG ".debug" /* debug */
399 #define ELF_DYNAMIC ".dynamic" /* dynamic linking information */
400 #define ELF_DYNSTR ".dynstr" /* dynamic string table */
401 #define ELF_DYNSYM ".dynsym" /* dynamic symbol table */
402 #define ELF_FINI ".fini" /* termination code */
403 #define ELF_GOT ".got" /* global offset table */
404 #define ELF_HASH ".hash" /* symbol hash table */
405 #define ELF_INIT ".init" /* initialization code */
406 #define ELF_REL_DATA ".rel.data" /* relocation data */
407 #define ELF_REL_FINI ".rel.fini" /* relocation termination code */
408 #define ELF_REL_INIT ".rel.init" /* relocation initialization code */
409 #define ELF_REL_DYN ".rel.dyn" /* relocaltion dynamic link info */
410 #define ELF_REL_RODATA ".rel.rodata" /* relocation read-only data */
411 #define ELF_REL_TEXT ".rel.text" /* relocation code */
412 #define ELF_RODATA ".rodata" /* read-only data */
413 #define ELF_SHSTRTAB ".shstrtab" /* section header string table */
414 #define ELF_STRTAB ".strtab" /* string table */
415 #define ELF_SYMTAB ".symtab" /* symbol table */
416 #define ELF_TEXT ".text" /* code */
418 // -------------------------------------------------------------------------
419 /* Section Attribute Flags - sh_flags */
421 #define SHF_WRITE 0x001 /* Writable */
422 #define SHF_ALLOC 0x002 /* occupies memory */
423 #define SHF_EXECINSTR 0x004 /* executable */
424 #define SHF_MERGE 0x010 /* merge data */
425 #define SHF_STRINGS 0x020 /* contains strings */
426 #define SHF_INFO_LINK 0x040 /* link in sh_info field */
427 #define SHF_LINK_ORDER 0x080 /* preserve link order */
428 #define SHF_OS_NONCONFORMING 0x100 /* special OS-specific */
429 /* processing needed */
430 #define SHF_GROUP 0x200 /* member of group */
431 #define SHF_MASKOS 0x0ff00000 /* reserved bits for OS */
432 /* specific section attributes */
433 #define SHF_MASKPROC 0xf0000000 /* reserved bits for processor */
434 /* specific section attributes */
436 // -------------------------------------------------------------------------
437 /* Symbol Table Entry */
440 Elf32_Word st_name; /* name - index into string table */
441 Elf32_Addr st_value; /* symbol value */
442 Elf32_Word st_size; /* symbol size */
443 unsigned char st_info; /* type and binding */
444 unsigned char st_other; /* visibility */
445 Elf32_Half st_shndx; /* section header index */
449 Elf64_Word st_name; /* Symbol name index in str table */
450 unsigned char st_info; /* type / binding attrs */
451 unsigned char st_other; /* visibility */
452 Elf64_Half st_shndx; /* section index of symbol */
453 Elf64_Addr st_value; /* value of symbol */
454 Elf64_Xword st_size; /* size of symbol */
457 // -------------------------------------------------------------------------
458 /* Symbol table index */
460 #define STN_UNDEF 0 /* undefined */
462 /* Extract symbol info - st_info */
463 #define ELF32_ST_BIND(x) ((x) >> 4)
464 #define ELF32_ST_TYPE(x) (((unsigned int) x) & 0xf)
465 #define ELF32_ST_INFO(b,t) (((b) << 4) + ((t) & 0xf))
467 #define ELF64_ST_BIND(x) ((x) >> 4)
468 #define ELF64_ST_TYPE(x) (((unsigned int) x) & 0xf)
469 #define ELF64_ST_INFO(b,t) (((b) << 4) + ((t) & 0xf))
471 #define ELF32_ST_VISIBILITY(o) ((o)&0x3)
472 #define ELF64_ST_VISIBILITY(o) ((o)&0x3)
474 // -------------------------------------------------------------------------
475 /* Symbol Binding - ELF32_ST_BIND - st_info */
477 #define STB_LOCAL 0 /* Local symbol */
478 #define STB_GLOBAL 1 /* Global symbol */
479 #define STB_WEAK 2 /* like global - lower precedence */
480 #define STB_NUM 3 /* number of symbol bindings */
481 #define STB_LOOS 10 /* reserved range for OS */
482 #define STB_HIOS 12 /* specific symbol bindings */
483 #define STB_LOPROC 13 /* reserved range for processor */
484 #define STB_HIPROC 15 /* specific symbol bindings */
486 // -------------------------------------------------------------------------
487 /* Symbol type - ELF32_ST_TYPE - st_info */
489 #define STT_NOTYPE 0 /* not specified */
490 #define STT_OBJECT 1 /* data object */
491 #define STT_FUNC 2 /* function */
492 #define STT_SECTION 3 /* section */
493 #define STT_FILE 4 /* file */
494 #define STT_COMMON 5 /* common block */
495 #define STT_NUM 6 /* number of symbol types */
496 #define STT_LOOS 10 /* reserved range for OS */
497 #define STT_HIOS 12 /* specific symbol types */
498 #define STT_LOPROC 13 /* reserved range for processor */
499 #define STT_HIPROC 15 /* specific symbol types */
501 // -------------------------------------------------------------------------
502 // symbol visibility in st_other
504 #define STV_DEFAULT 0 /* default to binding type */
505 #define STV_INTERNAL 1 /* processor specific */
506 #define STV_HIDDEN 2 /* invisible */
507 #define STV_PROTECTED 3 /* non-premptable */
509 // -------------------------------------------------------------------------
510 // 32 bit relocation records
512 /* Relocation entry with implicit addend */
515 Elf32_Addr r_offset; /* offset of relocation */
516 Elf32_Word r_info; /* symbol table index and type */
519 /* Relocation entry with explicit addend */
522 Elf32_Addr r_offset; /* offset of relocation */
523 Elf32_Word r_info; /* symbol table index and type */
524 Elf32_Sword r_addend;
527 /* Extract relocation info - r_info */
528 #define ELF32_R_SYM(i) ((i) >> 8)
529 #define ELF32_R_TYPE(i) ((unsigned char) (i))
530 #define ELF32_R_INFO(s,t) (((s) << 8) + (unsigned char)(t))
532 // -------------------------------------------------------------------------
533 // 64 bit equivalents of above structures and macros.
536 Elf64_Addr r_offset; /* where to do it */
537 Elf64_Xword r_info; /* index & type of relocation */
541 Elf64_Addr r_offset; /* where to do it */
542 Elf64_Xword r_info; /* index & type of relocation */
543 Elf64_Sxword r_addend; /* adjustment value */
546 #define ELF64_R_SYM(info) ((info) >> 32)
547 #define ELF64_R_TYPE(info) ((info) & 0xFFFFFFFF)
548 #define ELF64_R_INFO(s,t) (((s) << 32) + (u_int32_t)(t))
550 // -------------------------------------------------------------------------
554 Elf32_Word p_type; /* segment type */
555 Elf32_Off p_offset; /* segment offset */
556 Elf32_Addr p_vaddr; /* virtual address of segment */
557 Elf32_Addr p_paddr; /* physical address - ignored? */
558 Elf32_Word p_filesz; /* number of bytes in file for seg. */
559 Elf32_Word p_memsz; /* number of bytes in mem. for seg. */
560 Elf32_Word p_flags; /* flags */
561 Elf32_Word p_align; /* memory alignment */
565 Elf64_Word p_type; /* entry type */
566 Elf64_Word p_flags; /* flags */
567 Elf64_Off p_offset; /* offset */
568 Elf64_Addr p_vaddr; /* virtual address */
569 Elf64_Addr p_paddr; /* physical address */
570 Elf64_Xword p_filesz; /* file size */
571 Elf64_Xword p_memsz; /* memory size */
572 Elf64_Xword p_align; /* memory & file alignment */
575 // -------------------------------------------------------------------------
576 /* Segment types - p_type */
578 #define PT_NULL 0 /* unused */
579 #define PT_LOAD 1 /* loadable segment */
580 #define PT_DYNAMIC 2 /* dynamic linking section */
581 #define PT_INTERP 3 /* the RTLD */
582 #define PT_NOTE 4 /* auxiliary information */
583 #define PT_SHLIB 5 /* reserved - purpose undefined */
584 #define PT_PHDR 6 /* program header */
585 #define PT_NUM 7 /* Number of segment types */
586 #define PT_LOOS 0x60000000 /* reserved range for OS */
587 #define PT_HIOS 0x6fffffff /* specific segment types */
588 #define PT_LOPROC 0x70000000 /* reserved range for processor */
589 #define PT_HIPROC 0x7fffffff /* specific segment types */
591 // -------------------------------------------------------------------------
592 /* Segment flags - p_flags */
594 #define PF_X 0x1 /* Executable */
595 #define PF_W 0x2 /* Writable */
596 #define PF_R 0x4 /* Readable */
597 #define PF_MASKOS 0x0ff00000 /* reserved bits for OS */
598 /* specific segment flags */
599 #define PF_MASKPROC 0xf0000000 /* reserved bits for processor */
600 /* specific segment flags */
602 // -------------------------------------------------------------------------
603 /* Dynamic structure */
606 Elf32_Sword d_tag; /* controls meaning of d_val */
608 Elf32_Word d_val; /* Multiple meanings - see d_tag */
609 Elf32_Addr d_ptr; /* program virtual address */
613 extern Elf32_Dyn _DYNAMIC[]; /* XXX not 64-bit clean */
616 Elf64_Sxword d_tag; /* controls meaning of d_val */
623 // -------------------------------------------------------------------------
624 /* Dynamic Array Tags - d_tag */
626 #define DT_NULL 0 /* marks end of _DYNAMIC array */
627 #define DT_NEEDED 1 /* string table offset of needed lib */
628 #define DT_PLTRELSZ 2 /* size of relocation entries in PLT */
629 #define DT_PLTGOT 3 /* address PLT/GOT */
630 #define DT_HASH 4 /* address of symbol hash table */
631 #define DT_STRTAB 5 /* address of string table */
632 #define DT_SYMTAB 6 /* address of symbol table */
633 #define DT_RELA 7 /* address of relocation table */
634 #define DT_RELASZ 8 /* size of relocation table */
635 #define DT_RELAENT 9 /* size of relocation entry */
636 #define DT_STRSZ 10 /* size of string table */
637 #define DT_SYMENT 11 /* size of symbol table entry */
638 #define DT_INIT 12 /* address of initialization func. */
639 #define DT_FINI 13 /* address of termination function */
640 #define DT_SONAME 14 /* string table offset of shared obj */
641 #define DT_RPATH 15 /* string table offset of library
643 #define DT_SYMBOLIC 16 /* start sym search in shared obj. */
644 #define DT_REL 17 /* address of rel. tbl. w addends */
645 #define DT_RELSZ 18 /* size of DT_REL relocation table */
646 #define DT_RELENT 19 /* size of DT_REL relocation entry */
647 #define DT_PLTREL 20 /* PLT referenced relocation entry */
648 #define DT_DEBUG 21 /* bugger */
649 #define DT_TEXTREL 22 /* Allow rel. mod. to unwritable seg */
650 #define DT_JMPREL 23 /* add. of PLT's relocation entries */
651 #define DT_BIND_NOW 24 /* Bind now regardless of env setting */
652 #define DT_INIT_ARRAY 25 /* init array address */
653 #define DT_FINI_ARRAY 26 /* fini array address */
654 #define DT_INIT_ARRAYSZ 27 /* init array size */
655 #define DT_FINI_ARRAYSZ 28 /* fini array size */
656 #define DT_RUNPATH 29 /* library search path */
657 #define DT_FLAGS 30 /* flags */
658 #define DT_ENCODING 32 /* encoding rules start here */
659 #define DT_PREINIT_ARRAY 32 /* preinit array address */
660 #define DT_PREINIT_ARRAYSZ 33 /* preinit array size */
661 #define DT_NUM 26 /* Number used. */
662 #define DT_LOOS 0x60000000 /* reserved range for OS */
663 #define DT_HIOS 0x6fffffff /* specific dynamic array tags */
664 #define DT_LOPROC 0x70000000 /* reserved range for processor */
665 #define DT_HIPROC 0x7fffffff /* specific dynamic array tags */
667 // -------------------------------------------------------------------------
668 // Values for DT_FLAGS entry
670 #define DF_ORIGIN 0x1 /* Uses $ORIGIN substitution string */
671 #define DF_SYMBOLIC 0x2 /* search for symbols here first */
672 #define DF_TEXTREL 0x4 /* text may be relocatable */
673 #define DF_BIND_NOW 0x8 /* bind references now, dammit */
675 // -------------------------------------------------------------------------
676 /* Note Definitions */
690 // -------------------------------------------------------------------------
691 // Hash table structure
692 // The same structure is used by both 32 and 64 bit formats
695 Elf32_Word nbucket; /* number of buckets */
696 Elf32_Word nchain; /* number of chains */
698 /* The buckets follow this structure in memory and the chains
702 // -------------------------------------------------------------------------
703 #endif // ifndef CYGONCE_LOADER_ELF_H