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/*** coff information for Intel 386/486. */
/********************** FILE HEADER **********************/
struct external_filehdr {
word16 f_magic; /* magic number */
word16 f_nscns; /* number of sections */
word32 f_timdat; /* time & date stamp */
word32 f_symptr; /* file pointer to symtab */
word32 f_nsyms; /* number of symtab entries */
word16 f_opthdr; /* sizeof(optional hdr) */
word16 f_flags; /* flags */
};
/* Bits for f_flags:
* F_RELFLG relocation info stripped from file
* F_EXEC file is executable (no unresolved external references)
* F_LNNO line numbers stripped from file
* F_LSYMS local symbols stripped from file
* F_AR32WR file has byte ordering of an AR32WR machine (e.g. vax)
*/
#define F_RELFLG (0x0001)
#define F_EXEC (0x0002)
#define F_LNNO (0x0004)
#define F_LSYMS (0x0008)
#define I386MAGIC 0x14c
#define I386AIXMAGIC 0x175
#define I386BADMAG(x) (((x).f_magic!=I386MAGIC) && (x).f_magic!=I386AIXMAGIC)
#define FILHDR struct external_filehdr
#define FILHSZ sizeof(FILHDR)
/********************** AOUT "OPTIONAL HEADER" **********************/
typedef struct
{
word16 magic; /* type of file */
word16 vstamp; /* version stamp */
word32 tsize; /* text size in bytes, padded to FW bdry*/
word32 dsize; /* initialized data " " */
word32 bsize; /* uninitialized data " " */
word32 entry; /* entry pt. */
word32 text_start; /* base of text used for this file */
word32 data_start; /* base of data used for this file */
}
AOUTHDR;
typedef struct gnu_aout {
word32 info;
word32 tsize;
word32 dsize;
word32 bsize;
word32 symsize;
word32 entry;
word32 txrel;
word32 dtrel;
} GNU_AOUT;
#define AOUTSZ (sizeof(AOUTHDR))
#define OMAGIC 0404 /* object files, eg as output */
#define ZMAGIC 0413 /* demand load format, eg normal ld output */
#define STMAGIC 0401 /* target shlib */
#define SHMAGIC 0443 /* host shlib */
/********************** SECTION HEADER **********************/
struct external_scnhdr {
char s_name[8]; /* section name */
word32 s_paddr; /* physical address, aliased s_nlib */
word32 s_vaddr; /* virtual address */
word32 s_size; /* section size */
word32 s_scnptr; /* file ptr to raw data for section */
word32 s_relptr; /* file ptr to relocation */
word32 s_lnnoptr; /* file ptr to line numbers */
word16 s_nreloc; /* number of relocation entries */
word16 s_nlnno; /* number of line number entries*/
word32 s_flags; /* flags */
};
#define SCNHDR struct external_scnhdr
#define SCNHSZ sizeof(SCNHDR)
/*
* names of "special" sections
*/
#define _TEXT ".text"
#define _DATA ".data"
#define _BSS ".bss"
#define _COMMENT ".comment"
#define _LIB ".lib"
/*
* s_flags "type"
*/
#define STYP_TEXT (0x0020) /* section contains text only */
#define STYP_DATA (0x0040) /* section contains data only */
#define STYP_BSS (0x0080) /* section contains bss only */
/********************** LINE NUMBERS **********************/
/* 1 line number entry for every "breakpointable" source line in a section.
* Line numbers are grouped on a per function basis; first entry in a function
* grouping will have l_lnno = 0 and in place of physical address will be the
* symbol table index of the function name.
*/
struct external_lineno {
union {
word32 l_symndx __attribute__((packed)); /* function name symbol index, iff l_lnno == 0 */
word32 l_paddr __attribute__((packed)); /* (physical) address of line number */
} l_addr;
word16 l_lnno; /* line number */
};
#define LINENO struct external_lineno
#define LINESZ sizeof(LINENO)
/********************** SYMBOLS **********************/
#define E_SYMNMLEN 8 /* # characters in a symbol name */
#define E_FILNMLEN 14 /* # characters in a file name */
#define E_DIMNUM 4 /* # array dimensions in auxiliary entry */
struct external_syment
{
union {
char e_name[E_SYMNMLEN];
struct {
word32 e_zeroes __attribute__((packed));
word32 e_offset __attribute__((packed));
} e;
} e;
word32 e_value __attribute__((packed));
int16 e_scnum;
word16 e_type;
word8 e_sclass;
word8 e_numaux;
};
#define N_BTMASK (0xf)
#define N_TMASK (0x30)
#define N_BTSHFT (4)
#define N_TSHIFT (2)
union external_auxent {
struct {
word32 x_tagndx __attribute__((packed)); /* str, un, or enum tag indx */
union {
struct {
word16 x_lnno; /* declaration line number */
word16 x_size; /* str/union/array size */
} x_lnsz;
word32 x_fsize __attribute__((packed)); /* size of function */
} x_misc;
union {
struct { /* if ISFCN, tag, or .bb */
word32 x_lnnoptr __attribute__((packed)); /* ptr to fcn line # */
word32 x_endndx __attribute__((packed)); /* entry ndx past block end */
} x_fcn;
struct { /* if ISARY, up to 4 dimen. */
word16 x_dimen[E_DIMNUM];
} x_ary;
} x_fcnary;
word16 x_tvndx; /* tv index */
} x_sym;
union {
char x_fname[E_FILNMLEN];
struct {
word32 x_zeroes __attribute__((packed));
word32 x_offset __attribute__((packed));
} x_n;
} x_file;
struct {
word32 x_scnlen __attribute__((packed)); /* section length */
word16 x_nreloc; /* # relocation entries */
word16 x_nlinno; /* # line numbers */
} x_scn;
struct {
word32 x_tvfill __attribute__((packed)); /* tv fill value */
word16 x_tvlen; /* length of .tv */
word16 x_tvran[2]; /* tv range */
} x_tv; /* info about .tv section (in auxent of symbol .tv)) */
};
#define SYMENT struct external_syment
#define SYMESZ sizeof(SYMENT)
#define AUXENT union external_auxent
#define AUXESZ sizeof(AUXENT)
# define _ETEXT "etext"
/* Relocatable symbols have number of the section in which they are defined,
or one of the following: */
#define N_UNDEF ((short)0) /* undefined symbol */
#define N_ABS ((short)-1) /* value of symbol is absolute */
#define N_DEBUG ((short)-2) /* debugging symbol -- value is meaningless */
#define N_TV ((short)-3) /* indicates symbol needs preload transfer vector */
#define P_TV ((short)-4) /* indicates symbol needs postload transfer vector*/
/*
* Type of a symbol, in low N bits of the word
*/
#define T_NULL 0
#define T_VOID 1 /* function argument (only used by compiler) */
#define T_CHAR 2 /* character */
#define T_SHORT 3 /* short integer */
#define T_INT 4 /* integer */
#define T_LONG 5 /* long integer */
#define T_FLOAT 6 /* floating point */
#define T_DOUBLE 7 /* double word */
#define T_STRUCT 8 /* structure */
#define T_UNION 9 /* union */
#define T_ENUM 10 /* enumeration */
#define T_MOE 11 /* member of enumeration*/
#define T_UCHAR 12 /* unsigned character */
#define T_USHORT 13 /* unsigned short */
#define T_UINT 14 /* unsigned integer */
#define T_ULONG 15 /* unsigned long */
#define T_LNGDBL 16 /* long double */
/*
* derived types, in n_type
*/
#define DT_NON (0) /* no derived type */
#define DT_PTR (1) /* pointer */
#define DT_FCN (2) /* function */
#define DT_ARY (3) /* array */
#define BTYPE(x) ((x) & N_BTMASK)
#define ISPTR(x) (((x) & N_TMASK) == (DT_PTR << N_BTSHFT))
#define ISFCN(x) (((x) & N_TMASK) == (DT_FCN << N_BTSHFT))
#define ISARY(x) (((x) & N_TMASK) == (DT_ARY << N_BTSHFT))
#define ISTAG(x) ((x)==C_STRTAG||(x)==C_UNTAG||(x)==C_ENTAG)
#define DECREF(x) ((((x)>>N_TSHIFT)&~N_BTMASK)|((x)&N_BTMASK))
/********************** STORAGE CLASSES **********************/
/* This used to be defined as -1, but now n_sclass is unsigned. */
#define C_EFCN 0xff /* physical end of function */
#define C_NULL 0
#define C_AUTO 1 /* automatic variable */
#define C_EXT 2 /* external symbol */
#define C_STAT 3 /* static */
#define C_REG 4 /* register variable */
#define C_EXTDEF 5 /* external definition */
#define C_LABEL 6 /* label */
#define C_ULABEL 7 /* undefined label */
#define C_MOS 8 /* member of structure */
#define C_ARG 9 /* function argument */
#define C_STRTAG 10 /* structure tag */
#define C_MOU 11 /* member of union */
#define C_UNTAG 12 /* union tag */
#define C_TPDEF 13 /* type definition */
#define C_USTATIC 14 /* undefined static */
#define C_ENTAG 15 /* enumeration tag */
#define C_MOE 16 /* member of enumeration */
#define C_REGPARM 17 /* register parameter */
#define C_FIELD 18 /* bit field */
#define C_AUTOARG 19 /* auto argument */
#define C_LASTENT 20 /* dummy entry (end of block) */
#define C_BLOCK 100 /* ".bb" or ".eb" */
#define C_FCN 101 /* ".bf" or ".ef" */
#define C_EOS 102 /* end of structure */
#define C_FILE 103 /* file name */
#define C_LINE 104 /* line # reformatted as symbol table entry */
#define C_ALIAS 105 /* duplicate tag */
#define C_HIDDEN 106 /* ext symbol in dmert public lib */
/********************** RELOCATION DIRECTIVES **********************/
struct external_reloc {
word32 r_vaddr __attribute__((packed));
word32 r_symndx __attribute__((packed));
word16 r_type;
};
#define RELOC struct external_reloc
#define RELSZ sizeof(RELOC)
#define DEFAULT_DATA_SECTION_ALIGNMENT 4
#define DEFAULT_BSS_SECTION_ALIGNMENT 4
#define DEFAULT_TEXT_SECTION_ALIGNMENT 4
/* For new sections we havn't heard of before */
#define DEFAULT_SECTION_ALIGNMENT 4
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