NetBSD/gnu/dist/gdb/nindy-share/coff.h

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1997-09-24 20:57:14 +04:00
/* Copyright 1990, 1992 Free Software Foundation, Inc.
*
* This code was donated by Intel Corp.
*
* This is a coff version of a.out.h to support 80960 debugging from
* a Unix (possibly BSD) host. It's used by:
* o gdb960 to symbols in code generated with Intel (non-GNU) tools.
* o comm960 to convert a b.out file to a coff file for download.
*/
/********************** 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 */
};
/* Bits for f_flags:
* F_RELFLG relocation info stripped from file
* F_EXEC file is executable (no unresolved externel references)
* F_LNNO line nunbers 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 0000001
#define F_EXEC 0000002
#define F_LNNO 0000004
#define F_LSYMS 0000010
#define F_AR32WR 0000400
/*
* Intel 80960 (I960) processor flags.
* F_I960TYPE == mask for processor type field.
*/
#define F_I960TYPE 0170000
#define F_I960CA 0010000
#define F_I960FLOAT 0020000
#define F_I960BA 0030000
#define F_I960XA 0040000
/*
* i80960 Magic Numbers
*/
#define I960ROMAGIC 0540 /* read-only text segments */
#define I960RWMAGIC 0541 /* read-write text segments */
#define I960BADMAG(x) (((x).f_magic!=I960ROMAGIC) && ((x).f_magic!=I960RWMAGIC))
#define FILHDR struct filehdr
#define FILHSZ sizeof(FILHDR)
/********************** AOUT "OPTIONAL HEADER" **********************/
typedef struct {
unsigned long phys_addr;
unsigned long bitarray;
} TAGBITS;
typedef struct aouthdr {
short magic; /* type of file */
short vstamp; /* version stamp */
unsigned long tsize; /* text size in bytes, padded to FW bdry*/
unsigned long dsize; /* initialized data " " */
unsigned long bsize; /* uninitialized data " " */
#if U3B
unsigned long dum1;
unsigned long dum2; /* pad to entry point */
#endif
unsigned long entry; /* entry pt. */
unsigned long text_start; /* base of text used for this file */
unsigned long data_start; /* base of data used for this file */
unsigned long tagentries; /* number of tag entries to follow */
} AOUTHDR;
/* return a pointer to the tag bits array */
#define TAGPTR(aout) ((TAGBITS *) (&(aout.tagentries)+1))
/* compute size of a header */
#define AOUTSZ(aout) (sizeof(AOUTHDR)+(aout.tagentries*sizeof(TAGBITS)))
/********************** 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 /* line # reformatted as symbol table entry */
#define C_ALIAS 105 /* duplicate tag */
#define C_HIDDEN 106 /* ext symbol in dmert public lib */
/* New storage classes for 80960 */
#define C_SCALL 107 /* Procedure reachable via system call */
#define C_LEAFPROC 108 /* Leaf procedure, "call" via BAL */
/********************** SECTION HEADER **********************/
struct scnhdr {
char s_name[8]; /* section name */
long s_paddr; /* physical address, aliased s_nlib */
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 short s_nreloc; /* number of relocation entries */
unsigned short s_nlnno; /* number of line number entries*/
long s_flags; /* flags */
unsigned long s_align; /* section alignment */
};
/*
* names of "special" sections
*/
#define _TEXT ".text"
#define _DATA ".data"
#define _BSS ".bss"
/*
* s_flags "type"
*/
#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 SCNHDR struct scnhdr
#define SCNHSZ sizeof(SCNHDR)
/********************** 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 lineno{
union {
long l_symndx; /* function name symbol index, iff l_lnno == 0*/
long l_paddr; /* (physical) address of line number */
} l_addr;
unsigned short l_lnno; /* line number */
char padding[2]; /* force alignment */
};
#define LINENO struct lineno
#define LINESZ sizeof(LINENO)
/********************** SYMBOLS **********************/
#define SYMNMLEN 8 /* # characters in a symbol name */
#define FILNMLEN 14 /* # characters in a file name */
#define DIMNUM 4 /* # 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 */
char pad1[2]; /* force alignment */
unsigned long n_type; /* type and derived type */
char n_sclass; /* storage class */
char n_numaux; /* number of aux. entries */
char pad2[2]; /* force alignment */
};
#define n_name _n._n_name
#define n_zeroes _n._n_n._n_zeroes
#define n_offset _n._n_n._n_offset
/*
* Relocatable symbols have number of the section in which they are defined,
* or one of the following:
*/
#define N_UNDEF 0 /* undefined symbol */
#define N_ABS -1 /* value of symbol is absolute */
#define N_DEBUG -2 /* debugging symbol -- symbol value is meaningless */
/*
* Type of a symbol, in low 4 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
*/
#define DT_PTR 1 /* pointer */
#define DT_FCN 2 /* function */
#define DT_ARY 3 /* array */
#define N_BTMASK 037
#define N_TMASK 0140
#define N_BTSHFT 5
#define N_TSHIFT 2
#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 DECREF(x) ((((x)>>N_TSHIFT)&~N_BTMASK)|((x)&N_BTMASK))
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_tvndx; /* tv index */
} x_sym;
union {
char x_fname[FILNMLEN];
struct {
long x_zeroes;
long x_offset;
} x_n;
} x_file;
struct {
long x_scnlen; /* section length */
unsigned short x_nreloc; /* # relocation entries */
unsigned short x_nlinno; /* # line numbers */
} x_scn;
struct {
long x_stdindx;
} x_sc;
struct {
unsigned long x_balntry;
} x_bal;
char a[sizeof(struct syment)]; /* force auxent/syment sizes to match */
};
#define SYMENT struct syment
#define SYMESZ sizeof(SYMENT)
#define AUXENT union auxent
#define AUXESZ sizeof(AUXENT)
#if VAX || I960
# define _ETEXT "_etext"
#else
# define _ETEXT "etext"
#endif
/********************** RELOCATION DIRECTIVES **********************/
struct reloc {
long r_vaddr; /* Virtual address of reference */
long r_symndx; /* Index into symbol table */
unsigned short r_type; /* Relocation type */
char pad[2]; /* Unused */
};
/* Only values of r_type GNU/960 cares about */
#define R_RELLONG 17 /* Direct 32-bit relocation */
#define R_IPRMED 25 /* 24-bit ip-relative relocation */
#define R_OPTCALL 27 /* 32-bit optimizable call (leafproc/sysproc) */
#define RELOC struct reloc
#define RELSZ sizeof(RELOC)