exeelf.h

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#define PT_OS_O         7       // target os information
#define PT_RES_O        9       // read-only resource information

// note entry format

typedef struct {
    unsigned_32     n_namesz;   // length of name
    unsigned_32     n_descsz;   // length of descriptor
    unsigned_32     n_type;     // user defined "type" of the note
    //char            name[];   // variable length name
    //unsigned_32     desc[];   // descriptors go here
} Elf_Note;

// note types (used in core files)

#define NT_PRSTATUS     1       // process status
#define NT_FPREGSET     2       // floating point registers
#define NT_PRPSINFO     3       // process state info

// dynamic segment entry information.

typedef struct {
    Elf32_Sword         d_tag;
    union {
        Elf32_Word      d_val;
        Elf32_Addr      d_ptr;
    } d_un;
} Elf32_Dyn;

// dynamic array tags

#define DT_NULL         0
#define DT_NEEDED       1               // name of a needed library
#define DT_PLTRELSZ     2               // size of reloc entries for PLT
#define DT_PLTGOT       3               // address with PLT or GOT
#define DT_HASH         4               // symbol hash table address
#define DT_STRTAB       5               // string table address
#define DT_SYMTAB       6               // symbol table address
#define DT_RELA         7               // address of reloc table with addends
#define DT_RELASZ       8               // size of the DT_RELA table
#define DT_RELAENT      9               // size of a DT_RELA entry
#define DT_STRSZ        10              // size of the string table
#define DT_SYMENT       11              // size of a symbol table entry
#define DT_SONAME       14              // shared object name
#define DT_REL          17              // address of reloc table without addends
#define DT_RELSZ        18              // size of the DT_REL table
#define DT_RELENT       19              // size of a DT_REL entry
#define DT_PLTREL       20              // type of reloc entry for PLT
#define DT_DEBUG        21              // for debugging information
#define DT_JMPREL       23              // reloc entries only with PLT
#define DT_EXPORT       0x60000001      // address of export table
#define DT_EXPORTSZ     0x60000002      // size of export table
#define DT_EXPENT       0x60000003      // size of export table entry
#define DT_IMPORT       0x60000004      // address of import table
#define DT_IMPORTSZ     0x60000005      // size of import table
#define DT_IMPENT       0x60000006      // size of import table entry
#define DT_IT           0x60000007      // init and term types for a DLL.
#define DT_ITPRTY       0x60000008      // relative priority of init and term to other functions
#define DT_INITTERM     0x60000009      // address of init and term function
#define DT_PPC_GOT      0x70000001      // address of Global Offset Table
#define DT_PPC_GOTSZ    0x70000002      // size of Global Offset Table
#define DT_PPC_PLTSZ    0x70000003      // size of Procedure Linkage Table
#define DT_LOPROC       0x70000000      // range of processor-defined tags
#define DT_HIPROC       0x7FFFFFFF

// Old dynamic tags.  Readers should handle these, writers must use the above

#define DT_INIT_O       12      // address of initialization function
#define DT_FINI_O       13      // address of finialization function
#define DT_RPATH_O      15      // library search path
#define DT_SYMBOLIC_O   16      // affects dyn. linker's sym. resolution
#define DT_TEXTREL_O    22      // signal we might mod. a non-writable segment
#define DT_IT_O         24      // init and term types for a DLL.
#define DT_EXPORT_O     25      // address of export table
#define DT_EXPORTSZ_O   26      // size of export table
#define DT_IMPORT_O     27      // address of import table
#define DT_IMPORTSZ_O   28      // size of import table
#define DT_GOT_O        29      // address of Global Offset Table
#define DT_GOTSZ_O      30      // size of Global Offset Table
#define DT_PLTSZ_O      32      // size of Procedure Linkage Table
#define DT_ITPRTY_O     33      // relative priority of init and term to other functions
#define DT_LOUSER_O     0x60000000      // range of user-definable tags. will not
#define DT_HIUSER_O     0x6FFFFFFF      // conflict with system-defined tags
                                        // Ha Ha Ha!

// description of DT_IT tag:
// Describe type for initalization and termination of DLL
// Required if DT_INIT and DT_FINI also specified

#define ELF_32_IT_INIT(it)      ((it) & 0x0f)
#define ELF_32_IT_TERM(it)      (((it) >> 4) & 0x0f)
#define ELF_32_IT_INFO(i,t)     (((i) & 0x0f)|(((t) & 0x0f) << 4))

#define IT_NONE         0       // no initialization or termination
#define IT_GLOBAL       1       // global init, term
#define IT_INSTANCE     2       // process init, term
#define IT_THREAD       3       // thread init, term

// DT_INITTERM function prototype

typedef unsigned long INITTERM ( unsigned long modhandle, unsigned long flag );

// elf segment flag bits

#define PF_X            0x1             // seg has execute permissions
#define PF_W            0x2             // seg has write permissions
#define PF_R            0x4             // seg has read permissions
#define PF_S            0x01000000      // segment is shared.
#define PF_MASKPROC     0xf0000000      // processor-specific flag mask

// operating system information

typedef struct {
    Elf32_Word  os_type;
    Elf32_Word  os_size;
} Elf32_Os;

#define EOS_NONE        0       // bad or unknown
#define EOS_PN          1       // IBM Microkernel personality neutral
#define EOS_SVR4        2       // UNIX System V Release 4
#define EOS_AIX         3       // IBM AIX
#define EOS_OS2         4       // IBM OS/2, 32 bit
#define EOS_NT          5       // Microsoft Windows NT, 32 bit
#define EOS_VMS         6       // DEC VMS/VAX
#define EOS_OS400       7       // IBM OS/400
#define EOS_NEXT        8       // NEXT
#define EOS_SYSTEM7     9       // Apple System 7

// OS/2-specific information

typedef struct {
    unsigned char       os2_sessiontype;
    unsigned char       os2_sessionflags;
    unsigned char       os2_reserved[14];
} Elf32_OS2Info;

// os2_sessiontype values

#define OS2_SES_NONE    0       // no session type.  Only valid for DLL's
#define OS2_SES_FS      1       // Full Screen session.
#define OS2_SES_PM      2       // Presentation Manager session.
#define OS2_SES_VIO     3       // Windowed (character-mode) session

// import table entry

typedef struct {
    Elf32_Word  imp_ordinal;
    Elf32_Word  imp_name;
    Elf32_Word  imp_info;
    Elf32_Word  imp_reserved;
} Elf32_Import;

#define ELF32_IMP_TYPE(i)       ((i) >> 24)
#define ELF32_IMP_DLL(i)        ((i) & 0x00FFFFFF)
#define ELF32_IMP_INFO(t,d)     (((t)<<24) | ((d) & 0x00FFFFFF)))

#define IMP_IGNORED     0       // This import entry to be ignored
#define IMP_STR_IDX     1       // Value is string table index to load module
#define IMP_DT_IDX      2       // Value is ref to DT_NEEDED in Dynamic Segment

// export table entry

typedef struct {
    Elf32_Word  exp_ordinal;
    Elf32_Word  exp_symbol;
    Elf32_Word  exp_name;
    Elf32_Word  exp_reserved;
} Elf32_Export;

// Resource header

#define RH_NIDENT       16

typedef struct {
    unsigned char       rh_ident[RH_NIDENT];
    Elf32_Off           rh_name;
    Elf32_Word          rh_itnum;
    Elf32_Word          rh_rhsize;
    Elf32_Word          rh_size;
    Elf32_Off           rh_strtab;
} Elf32_Rhdr;

// rh_ident field indices

#define ELFRESMAG0      '\002'  // bytes of signature
#define ELFRESMAG1      'R'     // bytes of signature
#define ELFRESMAG2      'E'     // bytes of signature
#define ELFRESMAG3      'S'     // bytes of signature
#define RH_MAG0         0       // signature bytes
#define RH_MAG1         1       // signature bytes
#define RH_MAG2         2       // signature bytes
#define RH_MAG3         3       // signature bytes
#define RH_CLASS        4       // class of resource collection
#define RH_DATA         5       // data encoding of resource collection
#define RH_VERSION      6       // version
#define RH_PAD          7       // start of padding bytes - set to 0

// contents of RH_CLASS field

#define RESCLASSNONE    0       // invalid class
#define RESCLASS32      2       // 32-bit architecture
#define RESCLASS64      3       // reserved for 64-bit architecture

// contents of RH_DATA field

#define RESDATANONE     0       // invalid data
#define RESDATA2LSB     1       // Little Endian data encoding
#define RESDATA2MSB     2       // Bit Endian data encoding

// contents of RH_VERSION field

#define RV_NONE         0       // invalid version
#define RV_CURRENT      1       // current version.  will change in future.

// resource item

#define RI_NIDENT       4

typedef struct {
    unsigned char       ri_ident[RI_NIDENT];
    Elf32_Word          ri_type;
    Elf32_Off           ri_typename;
    Elf32_Word          ri_ordinal;
    Elf32_Off           ri_ordname;
    Elf32_Off           ri_data;
    Elf32_Word          ri_flags;
    Elf32_Word          ri_size;
    Elf32_Word          ri_reserved;
} Elf32_Ritem;

// ri_ident field indices

#define RI_VERSION      0       // version
#define RI_PAD          1       // start of padding bytes - set to 0

// contents of RI_VERSION field

#define IV_NONE         0       // invalid version
#define IV_CURRENT      1       // current version.  will change in future

// demangle information structure

typedef struct {
    Elf32_Word  idm_dllname;
    Elf32_Word  idm_initparms;
} Elf32_Demangle;

// default library structure

typedef struct {
    Elf32_Word  lib_name;
} Elf32_Library;

#ifdef __cplusplus
};
#endif
#endif // _EXEELF_H_INCLUDED_