elf.h

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/*
 * (c) 2008-2009 Author(s)
 *     economic rights: Technische Universität Dresden (Germany)
 * This file is part of TUD:OS and distributed under the terms of the
 * GNU Lesser General Public License 2.1.
 * Please see the COPYING-LGPL-2.1 file for details.
 */
 
/* (c) 2003-2006 Technische Universitaet Dresden
 * This file is part of the exec package, which is distributed under
 * the terms of the GNU General Public License 2. Please see the
 * COPYING file for details. */
 
#pragma once
 
#include <l4/sys/l4int.h>
 
typedef l4_uint32_t     Elf32_Addr;   
typedef l4_uint32_t     Elf32_Off;    
typedef l4_uint16_t     Elf32_Half;   
typedef l4_uint32_t     Elf32_Word;   
typedef l4_int32_t      Elf32_Sword;  
typedef l4_uint64_t     Elf64_Addr;   
typedef l4_uint64_t     Elf64_Off;    
typedef l4_uint16_t     Elf64_Half;   
typedef l4_uint32_t     Elf64_Word;   
typedef l4_int32_t      Elf64_Sword;  
typedef l4_uint64_t     Elf64_Xword;  
typedef l4_int64_t      Elf64_Sxword; 
#if L4_MWORD_BITS == 64
# define ElfW(type)      _ElfW(Elf, 64, type)
#else
# define ElfW(type)      _ElfW(Elf, 32, type)
#endif
#define _ElfW(e,w,t)    __ElfW(e, w, _##t)
#define __ElfW(e,w,t)   e##w##t
 
#if defined(ARCH_x86)
# define L4_ARCH_EI_DATA      ELFDATA2LSB
# define L4_ARCH_E_MACHINE    EM_386
# define L4_ARCH_EI_CLASS     ELFCLASS32
#elif defined(ARCH_amd64)
# define L4_ARCH_EI_DATA      ELFDATA2LSB
# define L4_ARCH_E_MACHINE    EM_X86_64
# define L4_ARCH_EI_CLASS     ELFCLASS64
#elif defined(ARCH_arm)
# define L4_ARCH_EI_DATA      ELFDATA2LSB
# define L4_ARCH_E_MACHINE    EM_ARM
# define L4_ARCH_EI_CLASS     ELFCLASS32
#elif defined(ARCH_arm64)
# define L4_ARCH_EI_DATA      ELFDATA2LSB
# define L4_ARCH_E_MACHINE    EM_AARCH64
# define L4_ARCH_EI_CLASS     ELFCLASS64
#elif defined(ARCH_ppc32)
# define L4_ARCH_EI_DATA      ELFDATA2MSB
# define L4_ARCH_E_MACHINE    EM_PPC
# define L4_ARCH_EI_CLASS     ELFCLASS32
#elif defined(ARCH_sparc)
# define L4_ARCH_EI_DATA      ELFDATA2MSB
# define L4_ARCH_E_MACHINE    EM_SPARC
# define L4_ARCH_EI_CLASS     ELFCLASS32
#elif defined(ARCH_mips)
# define L4_ARCH_EI_DATA      ELFDATA2LSB
# define L4_ARCH_E_MACHINE    EM_MIPS
# ifdef __mips64
#  define L4_ARCH_EI_CLASS     ELFCLASS64
# else
#  define L4_ARCH_EI_CLASS     ELFCLASS32
# endif
#elif defined(ARCH_riscv)
# define L4_ARCH_EI_DATA      ELFDATA2LSB
# define L4_ARCH_E_MACHINE    EM_RISCV
# if __riscv_xlen == 64
#  define L4_ARCH_EI_CLASS     ELFCLASS64
# else
#  define L4_ARCH_EI_CLASS     ELFCLASS32
# endif
#else
# warning elf.h: Unsupported build architecture!
#endif
 
 
enum
{
  EI_NIDENT             = 16,   
};
 
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;
 
typedef struct
{
  unsigned char e_ident[EI_NIDENT]; 
  Elf64_Half     e_type;         
  Elf64_Half     e_machine;      
  Elf64_Word     e_version;      
  Elf64_Addr     e_entry;        
  Elf64_Off      e_phoff;        
  Elf64_Off      e_shoff;        
  Elf64_Word     e_flags;        
  Elf64_Half     e_ehsize;       
  Elf64_Half     e_phentsize;    
  Elf64_Half     e_phnum;        
  Elf64_Half     e_shentsize;    
  Elf64_Half     e_shnum;        
  Elf64_Half     e_shstrndx;     
} Elf64_Ehdr;
 
enum Elf_ETs
{
  ET_NONE               = 0,      
  ET_REL                = 1,      
  ET_EXEC               = 2,      
  ET_DYN                = 3,      
  ET_CORE               = 4,      
  ET_LOPROC             = 0xff00, 
  ET_HIPROC             = 0xffff, 
};
 
enum Elf_EMs
{
  EM_NONE               = 0,    
  EM_M32                = 1,    
  EM_SPARC              = 2,    
  EM_386                = 3,    
  EM_68K                = 4,    
  EM_88K                = 5,    
  EM_860                = 7,    
  EM_MIPS               = 8,    
  EM_MIPS_RS4_BE        = 10,   
  EM_SPARC64            = 11,   
  EM_PARISC             = 15,   
  EM_VPP500             = 17,   
  EM_SPARC32PLUS        = 18,   
  EM_960                = 19,   
  EM_PPC                = 20,   
  EM_V800               = 36,   
  EM_FR20               = 37,   
  EM_RH32               = 38,   
  EM_RCE                = 39,   
  EM_ARM                = 40,   
  EM_ALPHA              = 41,   
  EM_SH                 = 42,   
  EM_SPARCV9            = 43,   
  EM_TRICORE            = 44,   
  EM_ARC                = 45,   
  EM_H8_300             = 46,   
  EM_H8_300H            = 47,   
  EM_H8S                = 48,   
  EM_H8_500             = 49,   
  EM_IA_64              = 50,   
  EM_MIPS_X             = 51,   
  EM_COLDFIRE           = 52,   
  EM_68HC12             = 53,   
  EM_X86_64             = 62,   
  EM_PDSP               = 63,   
  EM_FX66               = 66,   
  EM_ST9PLUS            = 67,   
  EM_ST7                = 68,   
  EM_68HC16             = 69,   
  EM_68HC11             = 70,   
  EM_68HC08             = 71,   
  EM_68HC05             = 72,   
  EM_SVX                = 73,   
  EM_ST19               = 74,   
  EM_VAX                = 75,   
  EM_CRIS               = 76,   
  EM_JAVELIN            = 77,   
  EM_FIREPATH           = 78,   
  EM_ZSP                = 79,   
  EM_MMIX               = 80,   
  EM_HUANY              = 81,   
  EM_PRISM              = 82,   
  EM_AVR                = 83,   
  EM_FR30               = 84,   
  EM_D10V               = 85,   
  EM_D30V               = 86,   
  EM_V850               = 87,   
  EM_M32R               = 88,   
  EM_MN10300            = 89,   
  EM_MN10200            = 90,   
  EM_PJ                 = 91,   
  EM_OPENRISC           = 92,   
  EM_ARC_A5             = 93,   
  EM_XTENSA             = 94,   
  EM_ALTERA_NIOS2       = 113,  
  EM_AARCH64            = 183,  
  EM_TILEPRO            = 188,  
  EM_MICROBLAZE         = 189,  
  EM_TILEGX             = 191,  
  EM_RISCV              = 243,   
  EM_NUM                = 244,
};
 
#if 0
#define EM_ALPHA        0x9026  /* interium value used by Linux until the
                                   committee comes up with a final number */
#define EM_S390         0xA390  /* interium value used for IBM S390 */
#endif
 
enum Elf_EVs
{
  EV_NONE               = 0,    
  EV_CURRENT            = 1,    
};
 
enum Elf_EIs
{
  EI_MAG0               = 0,    
  EI_MAG1               = 1,    
  EI_MAG2               = 2,    
  EI_MAG3               = 3,    
  EI_CLASS              = 4,    
  EI_DATA               = 5,    
  EI_VERSION            = 6,    
  EI_OSABI              = 7,    
  EI_ABIVERSION         = 8,    
  EI_PAD                = 9,    
};
 
enum Elf_MAGs
{
  ELFMAG0               = 0x7f, 
  ELFMAG1               = 'E',  
  ELFMAG2               = 'L',  
  ELFMAG3               = 'F',  
};
 
enum Elf_ClASSs
{
  ELFCLASSNONE          = 0,    
  ELFCLASS32            = 1,    
  ELFCLASS64            = 2,    
  ELFCLASSNUM           = 3,    
};
 
enum Elf_DATAs
{
  ELFDATANONE           = 0,    
  ELFDATA2LSB           = 1,    
  ELFDATA2MSB           = 2,    
  ELFDATANUM            = 3,    
};
 
enum Elf_OSABIs
{
  ELFOSABI_NONE         = 0,    
  ELFOSABI_SYSV         = 0,    
  ELFOSABI_HPUX         = 1,    
  ELFOSABI_NETBSD       = 2,    
  ELFOSABI_LINUX        = 3,    
  ELFOSABI_SOLARIS      = 6,    
  ELFOSABI_AIX          = 7,    
  ELFOSABI_IRIX         = 8,    
  ELFOSABI_FREEBSD      = 9,    
  ELFOSABI_TRU64        = 10,   
  ELFOSABI_MODESTO      = 11,   
  ELFOSABI_OPENBSD      = 12,   
  ELFOSABI_ARM          = 97,   
  ELFOSABI_STANDALONE   = 255,  
};
 
enum Elf_SHNs
{
  SHN_UNDEF             = 0,            
  SHN_LORESERVE         = 0xff00,       
  SHN_LOPROC            = 0xff00,       
  SHN_HIPROC            = 0xff1f,       
  SHN_ABS               = 0xfff1,       
  SHN_COMMON            = 0xfff2,       
  SHN_HIRESERVE         = 0xffff,       
};
 
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;
 
typedef struct
{
  Elf64_Word            sh_name;        
  Elf64_Word            sh_type;        
  Elf64_Xword           sh_flags;       
  Elf64_Addr            sh_addr;        
  Elf64_Off             sh_offset;      
  Elf64_Xword           sh_size;        
  Elf64_Word            sh_link;        
  Elf64_Word            sh_info;        
  Elf64_Xword           sh_addralign;   
  Elf64_Xword           sh_entsize;     
} Elf64_Shdr;
 
enum Elf_SHTs
{
  SHT_NULL              = 0,    
  SHT_PROGBITS          = 1,    
  SHT_SYMTAB            = 2,    
  SHT_STRTAB            = 3,    
  SHT_RELA              = 4,    
  SHT_HASH              = 5,    
  SHT_DYNAMIC           = 6,    
  SHT_NOTE              = 7,    
  SHT_NOBITS            = 8,    
  SHT_REL               = 9,    
  SHT_SHLIB             = 10,   
  SHT_DYNSYM            = 11,   
  SHT_INIT_ARRAY        = 14,   
  SHT_FINI_ARRAY        = 15,   
  SHT_PREINIT_ARRAY     = 16,   
  SHT_GROUP             = 17,   
  SHT_SYMTAB_SHNDX      = 18,   
  SHT_NUM               = 19,   
  SHT_LOOS              = 0x60000000, 
  SHT_HIOS              = 0x6fffffff, 
  SHT_LOPROC            = 0x70000000, 
  SHT_HIPROC            = 0x7fffffff, 
  SHT_LOUSER            = 0x80000000, 
  SHT_HIUSER            = 0xffffffff, 
};
 
enum Elf_SHFs
{
  SHF_WRITE             = 0x1,  
  SHF_ALLOC             = 0x2,  
  SHF_EXECINSTR         = 0x4,  
  SHF_MERGE             = 0x10, 
  SHF_STRINGS           = 0x20, 
  SHF_INFO_LINK         = 0x40, 
  SHF_LINK_ORDER        = 0x80, 
  SHF_OS_NONCONFORMING  = 0x100, 
  SHF_GROUP             = 0x200, 
  SHF_TLS               = 0x400, 
  SHF_MASKOS            = 0x0ff00000, 
  SHF_MASKPROC          = 0xf0000000, 
};
 
 
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;
 
typedef struct
{
  Elf64_Word    p_type;         
  Elf64_Word    p_flags;        
  Elf64_Off     p_offset;       
  Elf64_Addr    p_vaddr;        
  Elf64_Addr    p_paddr;        
  Elf64_Xword   p_filesz;       
  Elf64_Xword   p_memsz;        
  Elf64_Xword   p_align;        
} Elf64_Phdr;
 
enum Elf_PTs
{
  PT_NULL               = 0,    
  PT_LOAD               = 1,    
  PT_DYNAMIC            = 2,    
  PT_INTERP             = 3,    
  PT_NOTE               = 4,    
  PT_SHLIB              = 5,    
  PT_PHDR               = 6,    
  PT_TLS                = 7,    
  PT_NUM                = 8,    
  PT_LOOS               = 0x60000000, 
  PT_HIOS               = 0x6fffffff, 
  PT_LOPROC             = 0x70000000, 
  PT_HIPROC             = 0x7fffffff, 
  PT_GNU_EH_FRAME       = PT_LOOS + 0x474e550, 
  PT_GNU_STACK          = PT_LOOS + 0x474e551, 
  PT_GNU_RELRO          = PT_LOOS + 0x474e552, 
  PT_L4_STACK           = PT_LOOS + 0x12, 
  PT_L4_KIP             = PT_LOOS + 0x13, 
  PT_L4_AUX             = PT_LOOS + 0x14, 
};
 
enum ELF_PFs
{
  PF_X                  = 0x1,  
  PF_W                  = 0x2,  
  PF_R                  = 0x4,  
  PF_MASKOS             = 0x0ff00000, 
  PF_MASKPROC           = 0x7fffffff, 
};
 
enum Elf_NTs_core
{
  NT_PRSTATUS           = 1,    
  NT_FPREGSET           = 2,    
  NT_PRPSINFO           = 3,    
  NT_PRXREG             = 4,    
  NT_TASKSTRUCT         = 4,    
  NT_PLATFORM           = 5,    
  NT_AUXV               = 6,    
  NT_GWINDOWS           = 7,    
  NT_ASRS               = 8,    
  NT_PSTATUS            = 10,   
  NT_PSINFO             = 13,   
  NT_PRCRED             = 14,   
  NT_UTSNAME            = 15,   
  NT_LWPSTATUS          = 16,   
  NT_LWPSINFO           = 17,   
  NT_PRFPXREG           = 20,   
};
 
enum Elf_NTs_obj
{
  NT_VERSION            = 1,       
};
 
typedef struct
{
  Elf32_Sword   d_tag;  
  union
  {
    Elf32_Word  d_val;  
    Elf32_Addr  d_ptr;  
  } d_un;
} Elf32_Dyn;
 
typedef struct
{
  Elf64_Sxword  d_tag;  
  union
  {
    Elf64_Xword d_val;  
    Elf64_Addr  d_ptr;  
  } d_un;
} Elf64_Dyn;
 
enum Elf_DTs
{
  DT_NULL               = 0,    
  DT_NEEDED             = 1,    
  DT_PLTRELSZ           = 2,    
  DT_PLTGOT             = 3,    
  DT_HASH               = 4,    
  DT_STRTAB             = 5,    
  DT_SYMTAB             = 6,    
  DT_RELA               = 7,    
  DT_RELASZ             = 8,    
  DT_RELAENT            = 9,    
  DT_STRSZ              = 10,   
  DT_SYMENT             = 11,   
  DT_INIT               = 12,   
  DT_FINI               = 13,   
  DT_SONAME             = 14,   
  DT_RPATH              = 15,   
  DT_SYMBOLIC           = 16,   
  DT_REL                = 17,   
  DT_RELSZ              = 18,   
  DT_RELENT             = 19,   
  DT_PTRREL             = 20,   
  DT_DEBUG              = 21,   
  DT_TEXTREL            = 22,   
  DT_JMPREL             = 23,   
  DT_BIND_NOW           = 24,   
  DT_INIT_ARRAY         = 25,   
  DT_FINI_ARRAY         = 26,   
  DT_INIT_ARRAYSZ       = 27,   
  DT_FINI_ARRAYSZ       = 28,   
  DT_RUNPATH            = 29,   
  DT_FLAGS              = 30,   
  DT_ENCODING           = 32,   
  DT_PREINIT_ARRAY      = 32,   
  DT_PREINIT_ARRAYSZ    = 33,   
  DT_NUM                = 34,   
  DT_LOOS               = 0x6000000d, 
  DT_HIOS               = 0x6ffff000, 
  DT_LOPROC             = 0x70000000, 
  DT_HIPROC             = 0x7fffffff, 
};
 
enum Elf_DFs
{
  DF_ORIGIN             = 0x00000001,   
  DF_SYMBOLIC           = 0x00000002,   
  DF_TEXTREL            = 0x00000004,   
  DF_BIND_NOW           = 0x00000008,   
  DF_STATIC_TLS         = 0x00000010,   
};
 
enum Elf_DF_1s
{
  DF_1_NOW              = 0x00000001,   
  DF_1_GLOBAL           = 0x00000002,   
  DF_1_GROUP            = 0x00000004,   
  DF_1_NODELETE         = 0x00000008,   
  DF_1_LOADFLTR         = 0x00000010,   
  DF_1_INITFIRST        = 0x00000020,   
  DF_1_NOOPEN           = 0x00000040,   
  DF_1_ORIGIN           = 0x00000080,   
  DF_1_DIRECT           = 0x00000100,   
  DF_1_TRANS            = 0x00000200,
  DF_1_INTERPOSE        = 0x00000400,   
  DF_1_NODEFLIB         = 0x00000800,   
  DF_1_NODUMP           = 0x00001000,   
  DF_1_CONFALT          = 0x00002000,   
  DF_1_ENDFILTEE        = 0x00004000,   
  DF_1_DISPRELDNE       = 0x00008000,   
  DF_1_DISPRELPND       = 0x00010000,   
};
 
enum Elf_DTF_1s
{
  DTF_1_PARINIT         = 0x00000001,
  DTF_1_CONFEXP         = 0x00000002,
};
 
enum Elf_DF_P1s
{
  DF_P1_LAZYLOAD        = 0x00000001,   
  DF_P1_GROUPPERM       = 0x00000002,   
};
 
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;
 
typedef struct
{
  Elf64_Addr          r_offset;
  Elf64_Xword         r_info;
} Elf64_Rel;
 
typedef struct
{
  Elf64_Addr          r_offset;
  Elf64_Xword         r_info;
  Elf64_Sxword        r_addend;
} Elf64_Rela;
 
#define ELF32_R_SYM(i)    ((i)>>8)
#define ELF32_R_TYPE(i)   ((unsigned char)(i))
#define ELF32_R_INFO(s,t) (((s)<<8)+(unsigned char)(t))
 
#define ELF64_R_SYM(i)    ((i)>>32)
 
#define ELF64_R_TYPE(i)   ((i)&0xffffffffL)
 
#define ELF64_R_INFO(s,t) (((s)<<32)+(t)&0xffffffffL)
 
enum Elf_R_386_s
{
 R_386_NONE             = 0,    
 R_386_32               = 1,    
 R_386_PC32             = 2,    
 R_386_GOT32            = 3,    
 R_386_PLT32            = 4,    
 R_386_COPY             = 5,    
 R_386_GLOB_DAT         = 6,    
 R_386_JMP_SLOT         = 7,    
 R_386_RELATIVE         = 8,    
 R_386_GOTOFF           = 9,    
 R_386_GOTPC            = 10,   
 R_386_32PLT            = 11,
 R_386_TLS_TPOFF        = 14,   
 R_386_TLS_IE           = 15,   
 R_386_TLS_GOTIE        = 16,   
 R_386_TLS_LE           = 17,   
 R_386_TLS_GD           = 18,   
 R_386_TLS_LDM          = 19,   
 R_386_16               = 20,
 R_386_PC16             = 21,
 R_386_8                = 22,
 R_386_PC8              = 23,
 R_386_TLS_GD_32        = 24,   
 R_386_TLS_GD_PUSH      = 25,   
 R_386_TLS_GD_CALL      = 26,   
 R_386_TLS_GD_POP       = 27,   
 R_386_TLS_LDM_32       = 28,   
 R_386_TLS_LDM_PUSH     = 29,   
 R_386_TLS_LDM_CALL     = 30,   
 R_386_TLS_LDM_POP      = 31,   
 R_386_TLS_LDO_32       = 32,   
 R_386_TLS_IE_32        = 33,   
 R_386_TLS_LE_32        = 34,   
 R_386_TLS_DTPMOD32     = 35,   
 R_386_TLS_DTPOFF32     = 36,   
 R_386_TLS_TPOFF32      = 37,   
 R_386_NUM              = 38,   
};
 
enum Elf_EF_ARM_s
{
  EF_ARM_RELEXEC        = 0x01,
  EF_ARM_HASENTRY       = 0x02,
  EF_ARM_INTERWORK      = 0x04,
  EF_ARM_APCS_26        = 0x08,
  EF_ARM_APCS_FLOAT     = 0x10,
  EF_ARM_PIC            = 0x20,
  EF_ARM_ALIGN8         = 0x40, 
  EF_ARM_NEW_ABI        = 0x80,
  EF_ARM_OLD_ABI        = 0x100,
 
/* Other constants defined in the ARM ELF spec. version B-01.  */
/* NB. These conflict with values defined above.  */
  EF_ARM_SYMSARESORTED  = 0x04,
  EF_ARM_DYNSYMSUSESEGIDX = 0x08,
  EF_ARM_MAPSYMSFIRST   = 0x10,
  EF_ARM_EABIMASK       = 0XFF000000,
 
#define EF_ARM_EABI_VERSION(flags) ((flags) & EF_ARM_EABIMASK)
  EF_ARM_EABI_UNKNOWN   = 0x00000000,
  EF_ARM_EABI_VER1      = 0x01000000,
  EF_ARM_EABI_VER2      = 0x02000000,
};
 
enum Elf_STT_ARM_s
{
  STT_ARM_TFUNC         = 0xd,
};
 
enum Elf_SHF_s_ARM
{
  SHF_ARM_ENTRYSECT     = 0x10000000,   
  SHF_ARM_COMDEF        = 0x80000000,   
};
 
enum Elf_ARM_SBs
{
  PF_ARM_SB             = 0x10000000,   
};
 
enum Elf_R_ARM_s
{
  R_ARM_NONE            = 0,    
  R_ARM_PC24            = 1,    
  R_ARM_ABS32           = 2,    
  R_ARM_REL32           = 3,    
  R_ARM_PC13            = 4,
  R_ARM_ABS16           = 5,    
  R_ARM_ABS12           = 6,    
  R_ARM_THM_ABS5        = 7,
  R_ARM_ABS8            = 8,    
  R_ARM_SBREL32         = 9,
  R_ARM_THM_PC22        = 10,
  R_ARM_THM_PC8         = 11,
  R_ARM_AMP_VCALL9      = 12,
  R_ARM_SWI24           = 13,
  R_ARM_THM_SWI8        = 14,
  R_ARM_XPC25           = 15,
  R_ARM_THM_XPC22       = 16,
  R_ARM_COPY            = 20,   
  R_ARM_GLOB_DAT        = 21,   
  R_ARM_JUMP_SLOT       = 22,   
  R_ARM_RELATIVE        = 23,   
  R_ARM_GOTOFF          = 24,   
  R_ARM_GOTPC           = 25,   
  R_ARM_GOT32           = 26,   
  R_ARM_PLT32           = 27,   
  R_ARM_ALU_PCREL_7_0   = 32,
  R_ARM_ALU_PCREL_15_8  = 33,
  R_ARM_ALU_PCREL_23_15 = 34,
  R_ARM_LDR_SBREL_11_0  = 35,
  R_ARM_ALU_SBREL_19_12 = 36,
  R_ARM_ALU_SBREL_27_20 = 37,
  R_ARM_GNU_VTENTRY     = 100,
  R_ARM_GNU_VTINHERIT   = 101,
  R_ARM_THM_PC11        = 102,  
  R_ARM_THM_PC9         = 103,  
  R_ARM_RXPC25          = 249,
  R_ARM_RSBREL32        = 250,
  R_ARM_THM_RPC22       = 251,
  R_ARM_RREL32          = 252,
  R_ARM_RABS22          = 253,
  R_ARM_RPC24           = 254,
  R_ARM_RBASE           = 255,
  R_ARM_NUM             = 256,  
};
 
enum Elf_R_AARCH64_s
{
  R_AARCH64_NONE        = 0,    
  R_AARCH64_RELATIVE    = 1027,
};
 
enum Elf_R_X86_64_s
{
  R_X86_64_NONE         = 0,    
  R_X86_64_64           = 1,    
  R_X86_64_PC32         = 2,    
  R_X86_64_GOT32        = 3,    
  R_X86_64_PLT32        = 4,    
  R_X86_64_COPY         = 5,    
  R_X86_64_GLOB_DAT     = 6,    
  R_X86_64_JUMP_SLOT    = 7,    
  R_X86_64_RELATIVE     = 8,    
  R_X86_64_GOTPCREL     = 9,    
  R_X86_64_32           = 10,   
  R_X86_64_32S          = 11,   
  R_X86_64_16           = 12,   
  R_X86_64_PC16         = 13,   
  R_X86_64_8            = 14,   
  R_X86_64_PC8          = 15,   
  R_X86_64_DTPMOD64     = 16,   
  R_X86_64_DTPOFF64     = 17,   
  R_X86_64_TPOFF64      = 18,   
  R_X86_64_TLSGD        = 19,   
  R_X86_64_TLSLD        = 20,   
  R_X86_64_DTPOFF32     = 21,   
  R_X86_64_GOTTPOFF     = 22,   
  R_X86_64_TPOFF32      = 23,   
  R_X86_64_NUM          = 24,
};
 
enum Elf_STNs
{
  STN_UNDEF             = 0,
};
 
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;
 
typedef struct
{
  Elf64_Word            st_name;        
  unsigned char         st_info;        
  unsigned char         st_other;       
  Elf64_Half            st_shndx;       
  Elf64_Addr            st_value;       
  Elf64_Xword           st_size;        
} Elf64_Sym;
 
#define ELF32_ST_BIND(i)    ((i)>>4)
 
#define ELF32_ST_TYPE(i)    ((i)&0xf)
 
#define ELF32_ST_INFO(b,t)  (((b)<<4)+((t)&0xf))
 
#define ELF64_ST_BIND(i)    ((i)>>4)
 
#define ELF64_ST_TYPE(i)    ((i)&0xf)
 
#define ELF64_ST_INFO(b,t)  (((b)<<4)+((t)&0xf))
 
enum Elf_STBs
{
  STB_LOCAL     = 0,    
  STB_GLOBAL    = 1,    
  STB_WEAK      = 2,    
  STB_LOOS      = 10,   
  STB_HIOS      = 12,   
  STB_LOPROC    = 13,   
  STB_HIPROC    = 15,   
};
 
enum Elf_STTs
{
  STT_NOTYPE    = 0,    
  STT_OBJECT    = 1,    
  STT_FUNC      = 2,    
  STT_SECTION   = 3,    
  STT_FILE      = 4,    
  STT_LOOS      = 10,   
  STT_HIOS      = 12,   
  STT_LOPROC    = 13,   
  STT_HIPROC    = 15,   
};
 
enum Elf_ATs
{
  AT_NULL        = 0,   
  AT_IGNORE      = 1,   
  AT_EXECFD      = 2,   
  AT_PHDR        = 3,   
  AT_PHENT       = 4,   
  AT_PHNUM       = 5,   
  AT_PAGESZ      = 6,   
  AT_BASE        = 7,   
  AT_FLAGS       = 8,   
  AT_ENTRY       = 9,   
  AT_NOTELF      = 10,  
  AT_UID         = 11,  
  AT_EUID        = 12,  
  AT_GID         = 13,  
  AT_EGID        = 14,  
  AT_L4_AUX      = 0xf0, 
  AT_L4_ENV      = 0xf1, 
};
 
typedef struct Elf32_Auxv
{
  Elf32_Word atype;     
  Elf32_Word avalue;
} Elf32_Auxv;
 
typedef struct Elf64_Auxv
{
  Elf64_Word atype;     
  Elf64_Word avalue;
} Elf64_Auxv;
 
static inline int l4util_elf_check_magic(ElfW(Ehdr) const *hdr);
 
static inline int l4util_elf_check_arch(ElfW(Ehdr) const *hdr);
 
static inline ElfW(Phdr) *l4util_elf_phdr(ElfW(Ehdr) const *hdr);
 
 
/* Implementations */
 
static inline
int l4util_elf_check_magic(ElfW(Ehdr) const *hdr)
{
  return    hdr->e_ident[EI_MAG0] == ELFMAG0
         && hdr->e_ident[EI_MAG1] == ELFMAG1
         && hdr->e_ident[EI_MAG2] == ELFMAG2
         && hdr->e_ident[EI_MAG3] == ELFMAG3;
}
 
static inline
int l4util_elf_check_arch(ElfW(Ehdr) const *hdr)
{
  return    hdr->e_ident[EI_CLASS] == L4_ARCH_EI_CLASS
         && hdr->e_ident[EI_DATA]  == L4_ARCH_EI_DATA
         && hdr->e_machine         == L4_ARCH_E_MACHINE;
}
 
static inline
ElfW(Phdr) *l4util_elf_phdr(ElfW(Ehdr) const *hdr)
{
  return (ElfW(Phdr) *)((char *)hdr + hdr->e_phoff);
}