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nuttx/include/elf32.h
patacongo 14dae62821 Rename elf.h to elf32.h; Additional ELF loader changes 
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5263 42af7a65-404d-4744-a932-0658087f49c3
2012-10-26 02:42:39 +00:00

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