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coff.h
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coff.h
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/**************************************************************************/
/* COFF.H */
/* COFF data structures and related definitions used by the linker */
/**************************************************************************/
/*------------------------------------------------------------------------*/
/* COFF FILE HEADER */
/*------------------------------------------------------------------------*/
struct filehdr {
unsigned short f_magic; /* magic number */
unsigned short f_nscns; /* number of sections */
long f_timdat; /* time & date stamp */
long f_symptr; /* file pointer to symtab */
long f_nsyms; /* number of symtab entries */
unsigned short f_opthdr; /* sizeof(optional hdr) */
unsigned short f_flags; /* flags */
unsigned short f_TargetID; /* for C6x = 0x0099 */
};
/*------------------------------------------------------------------------*/
/* File header flags */
/*------------------------------------------------------------------------*/
#define F_RELFLG 0x01 /* relocation info stripped from file */
#define F_EXEC 0x02 /* file is executable (no unresolved refs) */
#define F_LNNO 0x04 /* line nunbers stripped from file */
#define F_LSYMS 0x08 /* local symbols stripped from file */
#define F_GSP10 0x10 /* 34010 version */
#define F_GSP20 0x20 /* 34020 version */
#define F_SWABD 0x40 /* bytes swabbed (in names) */
#define F_AR16WR 0x80 /* byte ordering of an AR16WR (PDP-11) */
#define F_LITTLE 0x100 /* byte ordering of an AR32WR (vax) */
#define F_BIG 0x200 /* byte ordering of an AR32W (3B, maxi) */
#define F_PATCH 0x400 /* contains "patch" list in optional header */
#define F_NODF 0x400
#define F_VERSION (F_GSP10 | F_GSP20)
#define F_BYTE_ORDER (F_LITTLE | F_BIG)
#define FILHDR struct filehdr
/* #define FILHSZ sizeof(FILHDR) */
#define FILHSZ 22 /* above rounds to align on 4 bytes which causes problems */
#define COFF_C67_MAGIC 0x00c2
/*------------------------------------------------------------------------*/
/* Macros to recognize magic numbers */
/*------------------------------------------------------------------------*/
#define ISMAGIC(x) (((unsigned short)(x))==(unsigned short)magic)
#define ISARCHIVE(x) ((((unsigned short)(x))==(unsigned short)ARTYPE))
#define BADMAGIC(x) (((unsigned short)(x) & 0x8080) && !ISMAGIC(x))
/*------------------------------------------------------------------------*/
/* OPTIONAL FILE HEADER */
/*------------------------------------------------------------------------*/
typedef struct aouthdr {
short magic; /* see magic.h */
short vstamp; /* version stamp */
long tsize; /* text size in bytes, padded to FW bdry*/
long dsize; /* initialized data " " */
long bsize; /* uninitialized data " " */
long entrypt; /* entry pt. */
long text_start; /* base of text used for this file */
long data_start; /* base of data used for this file */
} AOUTHDR;
#define AOUTSZ sizeof(AOUTHDR)
/*----------------------------------------------------------------------*/
/* When a UNIX aout header is to be built in the optional header, */
/* the following magic numbers can appear in that header: */
/* */
/* AOUT1MAGIC : default : readonly sharable text segment */
/* AOUT2MAGIC: : writable text segment */
/* PAGEMAGIC : : configured for paging */
/*----------------------------------------------------------------------*/
#define AOUT1MAGIC 0410
#define AOUT2MAGIC 0407
#define PAGEMAGIC 0413
/*------------------------------------------------------------------------*/
/* COMMON ARCHIVE FILE STRUCTURES */
/* */
/* ARCHIVE File Organization: */
/* _______________________________________________ */
/* |__________ARCHIVE_MAGIC_STRING_______________| */
/* |__________ARCHIVE_FILE_MEMBER_1______________| */
/* | | */
/* | Archive File Header "ar_hdr" | */
/* |.............................................| */
/* | Member Contents | */
/* | 1. External symbol directory | */
/* | 2. Text file | */
/* |_____________________________________________| */
/* |________ARCHIVE_FILE_MEMBER_2________________| */
/* | "ar_hdr" | */
/* |.............................................| */
/* | Member Contents (.o or text file) | */
/* |_____________________________________________| */
/* | . . . | */
/* | . . . | */
/* | . . . | */
/* |_____________________________________________| */
/* |________ARCHIVE_FILE_MEMBER_n________________| */
/* | "ar_hdr" | */
/* |.............................................| */
/* | Member Contents | */
/* |_____________________________________________| */
/* */
/*------------------------------------------------------------------------*/
#define COFF_ARMAG "!<arch>\n"
#define SARMAG 8
#define ARFMAG "`\n"
struct ar_hdr /* archive file member header - printable ascii */
{
char ar_name[16]; /* file member name - `/' terminated */
char ar_date[12]; /* file member date - decimal */
char ar_uid[6]; /* file member user id - decimal */
char ar_gid[6]; /* file member group id - decimal */
char ar_mode[8]; /* file member mode - octal */
char ar_size[10]; /* file member size - decimal */
char ar_fmag[2]; /* ARFMAG - string to end header */
};
/*------------------------------------------------------------------------*/
/* SECTION HEADER */
/*------------------------------------------------------------------------*/
struct scnhdr {
char s_name[8]; /* section name */
long s_paddr; /* physical address */
long s_vaddr; /* virtual address */
long s_size; /* section size */
long s_scnptr; /* file ptr to raw data for section */
long s_relptr; /* file ptr to relocation */
long s_lnnoptr; /* file ptr to line numbers */
unsigned int s_nreloc; /* number of relocation entries */
unsigned int s_nlnno; /* number of line number entries */
unsigned int s_flags; /* flags */
unsigned short s_reserved; /* reserved byte */
unsigned short s_page; /* memory page id */
};
#define SCNHDR struct scnhdr
#define SCNHSZ sizeof(SCNHDR)
/*------------------------------------------------------------------------*/
/* Define constants for names of "special" sections */
/*------------------------------------------------------------------------*/
/* #define _TEXT ".text" */
#define _DATA ".data"
#define _BSS ".bss"
#define _CINIT ".cinit"
#define _TV ".tv"
/*------------------------------------------------------------------------*/
/* The low 4 bits of s_flags is used as a section "type" */
/*------------------------------------------------------------------------*/
#define STYP_REG 0x00 /* "regular" : allocated, relocated, loaded */
#define STYP_DSECT 0x01 /* "dummy" : not allocated, relocated, not loaded */
#define STYP_NOLOAD 0x02 /* "noload" : allocated, relocated, not loaded */
#define STYP_GROUP 0x04 /* "grouped" : formed of input sections */
#define STYP_PAD 0x08 /* "padding" : not allocated, not relocated, loaded */
#define STYP_COPY 0x10 /* "copy" : used for C init tables -
not allocated, relocated,
loaded; reloc & lineno
entries processed normally */
#define STYP_TEXT 0x20 /* section contains text only */
#define STYP_DATA 0x40 /* section contains data only */
#define STYP_BSS 0x80 /* section contains bss only */
#define STYP_ALIGN 0x100 /* align flag passed by old version assemblers */
#define ALIGN_MASK 0x0F00 /* part of s_flags that is used for align vals */
#define ALIGNSIZE(x) (1 << ((x & ALIGN_MASK) >> 8))
/*------------------------------------------------------------------------*/
/* RELOCATION ENTRIES */
/*------------------------------------------------------------------------*/
struct reloc
{
long r_vaddr; /* (virtual) address of reference */
short r_symndx; /* index into symbol table */
unsigned short r_disp; /* additional bits for address calculation */
unsigned short r_type; /* relocation type */
};
#define RELOC struct reloc
#define RELSZ 10 /* sizeof(RELOC) */
/*--------------------------------------------------------------------------*/
/* define all relocation types */
/*--------------------------------------------------------------------------*/
#define R_ABS 0 /* absolute address - no relocation */
#define R_DIR16 01 /* UNUSED */
#define R_REL16 02 /* UNUSED */
#define R_DIR24 04 /* UNUSED */
#define R_REL24 05 /* 24 bits, direct */
#define R_DIR32 06 /* UNUSED */
#define R_RELBYTE 017 /* 8 bits, direct */
#define R_RELWORD 020 /* 16 bits, direct */
#define R_RELLONG 021 /* 32 bits, direct */
#define R_PCRBYTE 022 /* 8 bits, PC-relative */
#define R_PCRWORD 023 /* 16 bits, PC-relative */
#define R_PCRLONG 024 /* 32 bits, PC-relative */
#define R_OCRLONG 030 /* GSP: 32 bits, one's complement direct */
#define R_GSPPCR16 031 /* GSP: 16 bits, PC relative (in words) */
#define R_GSPOPR32 032 /* GSP: 32 bits, direct big-endian */
#define R_PARTLS16 040 /* Brahma: 16 bit offset of 24 bit address*/
#define R_PARTMS8 041 /* Brahma: 8 bit page of 24 bit address */
#define R_PARTLS7 050 /* DSP: 7 bit offset of 16 bit address */
#define R_PARTMS9 051 /* DSP: 9 bit page of 16 bit address */
#define R_REL13 052 /* DSP: 13 bits, direct */
/*------------------------------------------------------------------------*/
/* LINE NUMBER ENTRIES */
/*------------------------------------------------------------------------*/
struct lineno
{
union
{
long l_symndx ; /* sym. table index of function name
iff l_lnno == 0 */
long l_paddr ; /* (physical) address of line number */
} l_addr ;
unsigned short l_lnno ; /* line number */
};
#define LINENO struct lineno
#define LINESZ 6 /* sizeof(LINENO) */
/*------------------------------------------------------------------------*/
/* STORAGE CLASSES */
/*------------------------------------------------------------------------*/
#define C_EFCN -1 /* 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_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 /* dummy sclass for line number entry */
#define C_ALIAS 105 /* duplicate tag */
#define C_HIDDEN 106 /* special storage class for external */
/* symbols in dmert public libraries */
/*------------------------------------------------------------------------*/
/* SYMBOL TABLE ENTRIES */
/*------------------------------------------------------------------------*/
#define SYMNMLEN 8 /* Number of characters in a symbol name */
#define FILNMLEN 14 /* Number of characters in a file name */
#define DIMNUM 4 /* Number of array dimensions in auxiliary entry */
struct syment
{
union
{
char _n_name[SYMNMLEN]; /* old COFF version */
struct
{
long _n_zeroes; /* new == 0 */
long _n_offset; /* offset into string table */
} _n_n;
char *_n_nptr[2]; /* allows for overlaying */
} _n;
long n_value; /* value of symbol */
short n_scnum; /* section number */
unsigned short n_type; /* type and derived type */
char n_sclass; /* storage class */
char n_numaux; /* number of aux. entries */
};
#define n_name _n._n_name
#define n_nptr _n._n_nptr[1]
#define n_zeroes _n._n_n._n_zeroes
#define n_offset _n._n_n._n_offset
/*------------------------------------------------------------------------*/
/* Relocatable symbols have a section number of the */
/* section in which they are defined. Otherwise, section */
/* numbers have the following meanings: */
/*------------------------------------------------------------------------*/
#define N_UNDEF 0 /* undefined symbol */
#define N_ABS -1 /* value of symbol is absolute */
#define N_DEBUG -2 /* special debugging symbol */
#define N_TV (unsigned short)-3 /* needs transfer vector (preload) */
#define P_TV (unsigned short)-4 /* needs transfer vector (postload) */
/*------------------------------------------------------------------------*/
/* The fundamental type of a symbol packed into the low */
/* 4 bits of the word. */
/*------------------------------------------------------------------------*/
#define _EF ".ef"
#define T_NULL 0 /* no type info */
#define T_ARG 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 */
/*------------------------------------------------------------------------*/
/* derived types are: */
/*------------------------------------------------------------------------*/
#define DT_NON 0 /* no derived type */
#define DT_PTR 1 /* pointer */
#define DT_FCN 2 /* function */
#define DT_ARY 3 /* array */
#define MKTYPE(basic, d1,d2,d3,d4,d5,d6) \
((basic) | ((d1) << 4) | ((d2) << 6) | ((d3) << 8) |\
((d4) << 10) | ((d5) << 12) | ((d6) << 14))
/*------------------------------------------------------------------------*/
/* type packing constants and macros */
/*------------------------------------------------------------------------*/
#define N_BTMASK_COFF 017
#define N_TMASK_COFF 060
#define N_TMASK1_COFF 0300
#define N_TMASK2_COFF 0360
#define N_BTSHFT_COFF 4
#define N_TSHIFT_COFF 2
#define BTYPE_COFF(x) ((x) & N_BTMASK_COFF)
#define ISINT(x) (((x) >= T_CHAR && (x) <= T_LONG) || \
((x) >= T_UCHAR && (x) <= T_ULONG) || (x) == T_ENUM)
#define ISFLT_COFF(x) ((x) == T_DOUBLE || (x) == T_FLOAT)
#define ISPTR_COFF(x) (((x) & N_TMASK_COFF) == (DT_PTR << N_BTSHFT_COFF))
#define ISFCN_COFF(x) (((x) & N_TMASK_COFF) == (DT_FCN << N_BTSHFT_COFF))
#define ISARY_COFF(x) (((x) & N_TMASK_COFF) == (DT_ARY << N_BTSHFT_COFF))
#define ISTAG_COFF(x) ((x)==C_STRTAG || (x)==C_UNTAG || (x)==C_ENTAG)
#define INCREF_COFF(x) ((((x)&~N_BTMASK_COFF)<<N_TSHIFT_COFF)|(DT_PTR<<N_BTSHFT_COFF)|(x&N_BTMASK_COFF))
#define DECREF_COFF(x) ((((x)>>N_TSHIFT_COFF)&~N_BTMASK_COFF)|((x)&N_BTMASK_COFF))
/*------------------------------------------------------------------------*/
/* AUXILIARY SYMBOL ENTRY */
/*------------------------------------------------------------------------*/
union auxent
{
struct
{
long x_tagndx; /* str, un, or enum tag indx */
union
{
struct
{
unsigned short x_lnno; /* declaration line number */
unsigned short x_size; /* str, union, array size */
} x_lnsz;
long x_fsize; /* size of function */
} x_misc;
union
{
struct /* if ISFCN, tag, or .bb */
{
long x_lnnoptr; /* ptr to fcn line # */
long x_endndx; /* entry ndx past block end */
} x_fcn;
struct /* if ISARY, up to 4 dimen. */
{
unsigned short x_dimen[DIMNUM];
} x_ary;
} x_fcnary;
unsigned short x_regcount; /* number of registers used by func */
} x_sym;
struct
{
char x_fname[FILNMLEN];
} x_file;
struct
{
long x_scnlen; /* section length */
unsigned short x_nreloc; /* number of relocation entries */
unsigned short x_nlinno; /* number of line numbers */
} x_scn;
};
#define SYMENT struct syment
#define SYMESZ 18 /* sizeof(SYMENT) */
#define AUXENT union auxent
#define AUXESZ 18 /* sizeof(AUXENT) */
/*------------------------------------------------------------------------*/
/* NAMES OF "SPECIAL" SYMBOLS */
/*------------------------------------------------------------------------*/
#define _STEXT ".text"
#define _ETEXT "etext"
#define _SDATA ".data"
#define _EDATA "edata"
#define _SBSS ".bss"
#define _END "end"
#define _CINITPTR "cinit"
/*--------------------------------------------------------------------------*/
/* ENTRY POINT SYMBOLS */
/*--------------------------------------------------------------------------*/
#define _START "_start"
#define _MAIN "_main"
/* _CSTART "_c_int00" (defined in params.h) */
#define _TVORIG "_tvorig"
#define _TORIGIN "_torigin"
#define _DORIGIN "_dorigin"
#define _SORIGIN "_sorigin"