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#define SHT_LOUSER       0x80000000     /* Start of application-specific */
#define SHT_HIUSER       0x8fffffff     /* End of application-specific */

/* Legal values for sh_flags (section flags).  */

#define SHF_WRITE       (1 << 0)        /* Writable */
#define SHF_ALLOC       (1 << 1)        /* Occupies memory during execution */
#define SHF_EXECINSTR   (1 << 2)        /* Executable */
#define SHF_MASKPROC    0xf0000000      /* Processor-specific */

#define SHF_MERGE       0x10
#define SHF_STRINGS     0x20
#define SHF_INFO_LINK   0x40
#define SHF_LINK_ORDER  0x80
#define SHF_OS_NONCONFORMING 0x100
#define SHF_GROUP       0x200
#define SHF_TLS         0x400
#define SHF_MASKOS      0x0ff00000
#define SHF_ORDERED     0x40000000
#define SHF_EXCLUDE     0x80000000

/* Symbol table entry.  */

typedef struct
{
  Elf32_Word    st_name;                /* Symbol name (string tbl index) */
  Elf32_Addr    st_value;               /* Symbol value */
  Elf32_Word    st_size;                /* Symbol size */
  unsigned char st_info;                /* Symbol type and binding */
  unsigned char st_other;               /* No defined meaning, 0 */
  Elf32_Section st_shndx;               /* Section index */
} Elf32_Sym;

typedef struct
{
  Elf64_Word    st_name;                /* Symbol name (string tbl index) */
  unsigned char st_info;                /* Symbol type and binding */
  unsigned char st_other;               /* No defined meaning, 0 */
  Elf64_Section st_shndx;               /* Section index */
  Elf64_Addr    st_value;               /* Symbol value */
  Elf64_Xword   st_size;                /* Symbol size */
} Elf64_Sym;

/* The syminfo section if available contains additional information about
   every dynamic symbol.  */

typedef struct
{
  Elf32_Half si_boundto;                /* Direct bindings, symbol bound to */
  Elf32_Half si_flags;                  /* Per symbol flags */
} Elf32_Syminfo;

typedef struct
{
  Elf64_Half si_boundto;                /* Direct bindings, symbol bound to */
  Elf64_Half si_flags;                  /* Per symbol flags */
} Elf64_Syminfo;

/* Possible values for si_boundto.  */
#define SYMINFO_BT_SELF         0xffff  /* Symbol bound to self */
#define SYMINFO_BT_PARENT       0xfffe  /* Symbol bound to parent */
#define SYMINFO_BT_LOWRESERVE   0xff00  /* Beginning of reserved entries */

/* Possible bitmasks for si_flags.  */
#define SYMINFO_FLG_DIRECT      0x0001  /* Direct bound symbol */
#define SYMINFO_FLG_PASSTHRU    0x0002  /* Pass-thru symbol for translator */
#define SYMINFO_FLG_COPY        0x0004  /* Symbol is a copy-reloc */
#define SYMINFO_FLG_LAZYLOAD    0x0008  /* Symbol bound to object to be lazy
                                           loaded */
/* Syminfo version values.  */
#define SYMINFO_NONE            0
#define SYMINFO_CURRENT         1
#define SYMINFO_NUM             2


/* Special section index.  */

#define SHN_UNDEF       0               /* No section, undefined symbol.  */

/* How to extract and insert information held in the st_info field.  */

#define ELF32_ST_BIND(val)              (((unsigned char) (val)) >> 4)
#define ELF32_ST_TYPE(val)              ((val) & 0xf)
#define ELF32_ST_INFO(bind, type)       (((bind) << 4) + ((type) & 0xf))

/* Both Elf32_Sym and Elf64_Sym use the same one-byte st_info field.  */
#define ELF64_ST_BIND(val)              ELF32_ST_BIND (val)
#define ELF64_ST_TYPE(val)              ELF32_ST_TYPE (val)
#define ELF64_ST_INFO(bind, type)       ELF32_ST_INFO ((bind), (type))

/* Legal values for ST_BIND subfield of st_info (symbol binding).  */

#define STB_LOCAL       0               /* Local symbol */
#define STB_GLOBAL      1               /* Global symbol */
#define STB_WEAK        2               /* Weak symbol */
#define STB_NUM         3               /* Number of defined types.  */
#define STB_LOOS        10              /* Start of OS-specific */
#define STB_HIOS        12              /* End of OS-specific */
#define STB_LOPROC      13              /* Start of processor-specific */
#define STB_HIPROC      15              /* End of processor-specific */

/* Legal values for ST_TYPE subfield of st_info (symbol type).  */

#define STT_NOTYPE      0               /* Symbol type is unspecified */
#define STT_OBJECT      1               /* Symbol is a data object */
#define STT_FUNC        2               /* Symbol is a code object */
#define STT_SECTION     3               /* Symbol associated with a section */
#define STT_FILE        4               /* Symbol's name is file name */
#define STT_NUM         5               /* Number of defined types.  */
#define STT_GNU_IFUNC   10              /* Symbol is a indirect code object */
#define STT_LOOS        11              /* Start of OS-specific */
#define STT_HIOS        12              /* End of OS-specific */
#define STT_LOPROC      13              /* Start of processor-specific */
#define STT_HIPROC      15              /* End of processor-specific */


/* Symbol table indices are found in the hash buckets and chain table
   of a symbol hash table section.  This special index value indicates
   the end of a chain, meaning no further symbols are found in that bucket.  */

#define STN_UNDEF       0               /* End of a chain.  */