forked from Archive/PX4-Autopilot
353 lines
12 KiB
C
353 lines
12 KiB
C
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/****************************************************************************
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* include/elf32.h
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*
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* Copyright (C) 2012 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Reference: System V Application Binary Interface, Edition 4.1, March 18,
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* 1997, The Santa Cruz Operation, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __INCLUDE_ELF32_H
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#define __INCLUDE_ELF32_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Values for Elf32_Ehdr::e_type */
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#define ET_NONE 0 /* No file type */
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#define ET_REL 1 /* Relocatable file */
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#define ET_EXEC 2 /* Executable file */
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#define ET_DYN 3 /* Shared object file */
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#define ET_CORE 4 /* Core file */
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#define ET_LOPROC 0xff00 /* Processor-specific */
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#define ET_HIPROC 0xffff /* Processor-specific */
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/* Values for Elf32_Ehdr::e_machine (most of this were not included in the
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* original SCO document but have been gleaned from elsewhere).
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*/
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#define EM_NONE 0 /* No machine */
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#define EM_M32 1 /* AT&T WE 32100 */
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#define EM_SPARC 2 /* SPARC */
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#define EM_386 3 /* Intel 80386 */
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#define EM_68K 4 /* Motorola 68000 */
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#define EM_88K 5 /* Motorola 88000 */
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#define EM_486 6 /* Intel 486+ */
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#define EM_860 7 /* Intel 80860 */
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#define EM_MIPS 8 /* MIPS R3000 Big-Endian */
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#define EM_MIPS_RS4_BE 10 /* MIPS R4000 Big-Endian */
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#define EM_PARISC 15 /* HPPA */
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#define EM_SPARC32PLUS 18 /* Sun's "v8plus" */
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#define EM_PPC 20 /* PowerPC */
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#define EM_PPC64 21 /* PowerPC64 */
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#define EM_ARM 40 /* ARM */
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#define EM_SH 42 /* SuperH */
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#define EM_SPARCV9 43 /* SPARC v9 64-bit */
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#define EM_IA_64 50 /* HP/Intel IA-64 */
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#define EM_X86_64 62 /* AMD x86-64 */
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#define EM_S390 22 /* IBM S/390 */
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#define EM_CRIS 76 /* Axis Communications 32-bit embedded processor */
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#define EM_V850 87 /* NEC v850 */
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#define EM_M32R 88 /* Renesas M32R */
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#define EM_H8_300 46
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#define EM_ALPHA 0x9026
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#define EM_CYGNUS_V850 0x9080
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#define EM_CYGNUS_M32R 0x9041
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#define EM_S390_OLD 0xa390
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#define EM_FRV 0x5441
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/* Values for Elf32_Ehdr::e_version */
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#define EV_NONE 0 /* Invalid version */
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#define EV_CURRENT 1 /* The current version */
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/* Ehe ELF identifier */
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#define EI_MAG0 0 /* File identification */
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#define EI_MAG1 1 /* " " " " */
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#define EI_MAG2 2 /* " " " " */
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#define EI_MAG3 3 /* " " " " */
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#define EI_CLASS 4 /* File class */
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#define EI_DATA 5 /* Data encoding */
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#define EI_VERSION 6 /* File version */
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#define EI_PAD 7 /* Start of padding bytes */
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#define EI_NIDENT 16 /* Size of eident[] */
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#define EI_MAGIC_SIZE 4
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#define EI_MAGIC {0x7f, 'E', 'L', 'F'}
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/* Values for EI_CLASS */
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#define ELFCLASSNONE 0 /* Invalid class */
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#define ELFCLASS32 1 /* 32-bit objects */
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#define ELFCLASS64 2 /* 64-bit objects */
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/* Values for EI_DATA */
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#define ELFDATANONE 0 /* Invalid data encoding */
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#define ELFDATA2LSB 1 /* Least significant byte occupying the lowest address */
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#define ELFDATA2MSB 2 /* Most significant byte occupying the lowest address */
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/* Figure 4-7: Special Section Indexes */
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#define SHN_UNDEF 0
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#define SHN_LORESERVE 0xff00
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#define SHN_LOPROC 0xff00
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#define SHN_HIPROC 0xff1f
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#define SHN_ABS 0xfff1
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#define SHN_COMMON 0xfff2
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#define SHN_HIRESERVE 0xffff
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/* Figure 4-9: Section Types, sh_type */
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#define SHT_NULL 0
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#define SHT_PROGBITS 1
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#define SHT_SYMTAB 2
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#define SHT_STRTAB 3
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#define SHT_RELA 4
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#define SHT_HASH 5
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#define SHT_DYNAMIC 6
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#define SHT_NOTE 7
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#define SHT_NOBITS 8
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#define SHT_REL 9
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#define SHT_SHLIB 10
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#define SHT_DYNSYM 11
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#define SHT_LOPROC 0x70000000
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#define SHT_HIPROC 0x7fffffff
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#define SHT_LOUSER 0x80000000
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#define SHT_HIUSER 0xffffffff
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/* Figure 4-11: Section Attribute Flags, sh_flags */
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#define SHF_WRITE 1
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#define SHF_ALLOC 2
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#define SHF_EXECINSTR 4
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#define SHF_MASKPROC 0xf0000000
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/* Definitions for Elf32_Sym::st_info */
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#define ELF32_ST_BIND(i) ((i) >> 4)
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#define ELF32_ST_TYPE(i) ((i) & 0xf)
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#define ELF32_ST_INFO(b,t) (((b) << 4) | ((t) & 0xf))
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/* Figure 4-16: Symbol Binding, ELF32_ST_BIND */
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#define STB_LOCAL 0
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#define STB_GLOBAL 1
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#define STB_WEAK 2
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#define STB_LOPROC 13
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#define STB_HIPROC 15
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/* Figure 4-17: Symbol Types, ELF32_ST_TYPE */
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#define STT_NOTYPE 0
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#define STT_OBJECT 1
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#define STT_FUNC 2
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#define STT_SECTION 3
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#define STT_FILE 4
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#define STT_LOPROC 13
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#define STT_HIPROC 15
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/* Definitions for Elf32_Rel*::r_info */
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#define ELF32_R_SYM(i) ((i) >> 8)
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#define ELF32_R_TYPE(i) ((i) & 0xff)
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#define ELF32_R_INFO(s,t) (((s)<< 8) | ((t) & 0xff))
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/* Figure 5-2: Segment Types, p_type */
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#define PT_NULL 0
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#define PT_LOAD 1
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#define PT_DYNAMIC 2
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#define PT_INTERP 3
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#define PT_NOTE 4
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#define PT_SHLIB 5
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#define PT_PHDR 6
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#define PT_LOPROC 0x70000000
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#define PT_HIPROC 0x7fffffff
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/* Figure 5-3: Segment Flag Bits, p_flags */
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#define PF_X 1 /* Execute */
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#define PF_W 2 /* Write */
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#define PF_R 4 /* Read */
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#define PF_MASKPROC 0xf0000000 /* Unspecified */
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/* Figure 5-10: Dynamic Array Tags, d_tag */
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#define DT_NULL 0 /* d_un=ignored */
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#define DT_NEEDED 1 /* d_un=d_val */
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#define DT_PLTRELSZ 2 /* d_un=d_val */
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#define DT_PLTGOT 3 /* d_un=d_ptr */
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#define DT_HASH 4 /* d_un=d_ptr */
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#define DT_STRTAB 5 /* d_un=d_ptr */
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#define DT_SYMTAB 6 /* d_un=d_ptr */
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#define DT_RELA 7 /* d_un=d_ptr */
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#define DT_RELASZ 8 /* d_un=d_val */
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#define DT_RELAENT 9 /* d_un=d_val */
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#define DT_STRSZ 10 /* d_un=d_val */
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#define DT_SYMENT 11 /* d_un=d_val */
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#define DT_INIT 12 /* d_un=d_ptr */
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#define DT_FINI 13 /* d_un=d_ptr */
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#define DT_SONAME 14 /* d_un=d_val */
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#define DT_RPATH 15 /* d_un=d_val */
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#define DT_SYMBOLIC 16 /* d_un=ignored */
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#define DT_REL 17 /* d_un=d_ptr */
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#define DT_RELSZ 18 /* d_un=d_val */
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#define DT_RELENT 19 /* d_un=d_val */
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#define DT_PLTREL 20 /* d_un=d_val */
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#define DT_DEBUG 21 /* d_un=d_ptr */
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#define DT_TEXTREL 22 /* d_un=ignored */
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#define DT_JMPREL 23 /* d_un=d_ptr */
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#define DT_BINDNOW 24 /* d_un=ignored */
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#define DT_LOPROC 0x70000000 /* d_un=unspecified */
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#define DT_HIPROC 0x7fffffff /* d_un= unspecified */
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/****************************************************************************
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* Public Type Definitions
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****************************************************************************/
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/* Figure 4.2: 32-Bit Data Types */
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typedef uint32_t Elf32_Addr; /* Unsigned program address */
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typedef uint16_t Elf32_Half; /* Unsigned medium integer */
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typedef uint32_t Elf32_Off; /* Unsigned file offset */
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typedef int32_t Elf32_Sword; /* Signed large integer */
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typedef uint32_t Elf32_Word; /* Unsigned large integer */
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/* Figure 4-3: ELF Header */
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typedef struct
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{
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unsigned char e_ident[EI_NIDENT];
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Elf32_Half e_type;
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Elf32_Half e_machine;
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Elf32_Word e_version;
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Elf32_Addr e_entry;
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Elf32_Off e_phoff;
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Elf32_Off e_shoff;
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Elf32_Word e_flags;
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Elf32_Half e_ehsize;
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Elf32_Half e_phentsize;
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Elf32_Half e_phnum;
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Elf32_Half e_shentsize;
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Elf32_Half e_shnum;
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Elf32_Half e_shstrndx;
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} Elf32_Ehdr;
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/* Figure 4-8: Section Header */
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typedef struct
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{
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Elf32_Word sh_name;
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Elf32_Word sh_type;
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Elf32_Word sh_flags;
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Elf32_Addr sh_addr;
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Elf32_Off sh_offset;
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Elf32_Word sh_size;
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Elf32_Word sh_link;
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Elf32_Word sh_info;
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Elf32_Word sh_addralign;
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Elf32_Word sh_entsize;
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} Elf32_Shdr;
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/* Figure 4-15: Symbol Table Entry */
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typedef struct
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{
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Elf32_Word st_name;
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Elf32_Addr st_value;
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Elf32_Word st_size;
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unsigned char st_info;
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unsigned char st_other;
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Elf32_Half st_shndx;
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} Elf32_Sym;
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/* Figure 4-19: Relocation Entries */
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typedef struct
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{
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Elf32_Addr r_offset;
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Elf32_Word r_info;
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} Elf32_Rel;
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typedef struct
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{
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Elf32_Addr r_offset;
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Elf32_Word r_info;
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Elf32_Sword r_addend;
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} Elf32_Rela;
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/* Figure 5-1: Program Header */
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typedef struct
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{
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Elf32_Word p_type;
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Elf32_Off p_offset;
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Elf32_Addr p_vaddr;
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Elf32_Addr p_paddr;
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Elf32_Word p_filesz;
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Elf32_Word p_memsz;
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Elf32_Word p_flags;
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Elf32_Word p_align;
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} Elf32_Phdr;
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/* Figure 5-9: Dynamic Structure */
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typedef struct
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{
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Elf32_Sword d_tag;
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union
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{
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Elf32_Word d_val;
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Elf32_Addr d_ptr;
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} d_un;
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} Elf32_Dyn;
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//extern Elf32_Dyn _DYNAMIC[] ;
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#endif /* __INCLUDE_ELF32_H */
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