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binutils-gdb/include/coff-mips.h
John Gilmore d7344eca22 Initial revision
1991-05-19 15:26:27 +00:00

428 lines
15 KiB
C
Executable File
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/* ECOFF include file for MIPS machines. It has been split off from the
include files for other COFF machines. It is derived from... */
/*** coff information for 80960. Origins: Intel corp, natch. */
/* This include file is also used for rudimentary ECOFF support on MIPS
machines. Such differences as are needed are #ifdef MIPS. */
/* For separate ecoff.h: we force MIPS on, to get the changes. */
#undef MIPS
#define MIPS 1
/* NOTE: Tagentries (cf TAGBITS) are not used by the 960 */
/********************** 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 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 F_AR32WR (0x0010)
/*
* Intel 80960 (I960) processor flags.
* F_I960TYPE == mask for processor type field.
*/
#define F_I960TYPE (0xf000)
#define F_I960CORE (0x1000)
#define F_I960KB (0x2000)
#define F_I960SB (0x2000)
#define F_I960MC (0x3000)
#define F_I960XA (0x4000)
#define F_I960CA (0x5000)
#define F_I960KA (0x6000)
#define F_I960SA (0x6000)
/*
* i80960 Magic Numbers
*/
#define I960ROMAGIC (0x160) /* read-only text segments */
#define I960RWMAGIC (0x161) /* 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;
/* These appear to be used only by exec(2). I don't know who cares
about them in a cross development environment. In any case, this
is my collection after researching the issue for a few hours.
Apparently, most have these have remained essentially unchanged
since v7 days, although a few new ones have been added. xoxorich.
Could we have a little more teleology please? -- Gumby */
#define BAD0MAGIC (0401) /* (?) "lpd (UNIX/RT)" */
#define BAD1MAGIC (0405) /* (?) overlay */
#define OMAGIC (0407) /* old impure format. data immediately
follows text. both sections are rw. */
#define NMAGIC (0410) /* split i&d, read-only text */
#define A_MAGIC3 (0411) /* (?) "separated I&D" */
#define ZMAGIC (0413) /* like NMAGIC, but demand loaded */
#define PAGEMAGIC2 (0414) /* (?) like ZMAGIC, but address zero
explicitly unmapped. */ /* */
#define REGMAGIC (0414) /* (?) a PAGEMAGIC2 alias? */
#define PAGEMAGIC3 (0415) /* (?) like ZMAGIC, but address zero mapped. */
#define A_MAGIC5 (0437) /* (?) "system overlay, separated I&D" */
#define SASMAGIC (010000) /* (?) "Single Address Space" */
#define MASMAGIC (020000) /* (?) "Multiple (separate I/D) Addr. Spaces" */
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)))*/
#define AOUTSZ (sizeof(AOUTHDR))
/********************** 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_REGARG 19 */ /* My guess - but Intel specific*/
#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 */
/* New storage classes for 80960 */
/* C_LEAFPROC is obsolete. Use C_LEAFEXT or C_LEAFSTAT */
#define C_LEAFPROC 108 /* Leaf procedure, "call" via BAL */
#define C_SCALL 107 /* Procedure reachable via system call */
#define C_LEAFEXT 108 /* External leaf */
#define C_LEAFSTAT 113 /* Static leaf */
#define C_OPTVAR 109 /* Optimized variable */
#define C_DEFINE 110 /* Preprocessor #define */
#define C_PRAGMA 111 /* Advice to compiler or linker */
#define C_SEGMENT 112 /* 80960 segment name */
/********************** 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 */
#ifndef MIPS
/* This field exists in Intel COFF, not in Mips ECOFF. */
unsigned long s_align; /* section alignment */
#endif
};
/*
* names of "special" sections
*/
#define _TEXT ".text"
#define _DATA ".data"
#define _BSS ".bss"
/*
* s_flags "type"
*/
#define STYP_REG (0x0000) /* "regular": allocated, relocated, loaded */
#define STYP_DSECT (0x0001) /* "dummy": relocated only*/
#define STYP_NOLOAD (0x0002) /* "noload": allocated, relocated, not loaded */
#define STYP_GROUP (0x0004) /* "grouped": formed of input sections */
#define STYP_PAD (0x0008) /* "padding": not allocated, not relocated, loaded */
#define STYP_COPY (0x0010) /* "copy": for decision function used by field update; not allocated, not relocated,
loaded; reloc & lineno entries processed normally */
#define STYP_TEXT (0x0020) /* section contains text only */
#define S_SHRSEG (0x0020) /* In 3b Update files (output of ogen), sections which appear in SHARED segments of the Pfile
will have the S_SHRSEG flag set by ogen, to inform dufr that updating 1 copy of the proc. will
update all process invocations. */
#define STYP_DATA (0x0040) /* section contains data only */
#define STYP_BSS (0x0080) /* section contains bss only */
#define S_NEWFCN (0x0100) /* In a minimal file or an update file, a new function (as compared with a replaced function) */
#define STYP_INFO (0x0200) /* comment: not allocated not relocated, not loaded */
#define STYP_OVER (0x0400) /* overlay: relocated not allocated or loaded */
#define STYP_LIB (0x0800) /* for .lib: same as INFO */
#define STYP_MERGE (0x2000) /* merge section -- combines with text, data or bss sections only */
#define STYP_REVERSE_PAD (0x4000) /* section will be padded with no-op instructions wherever padding is necessary and there is a
word of contiguous bytes beginning on a word boundary. */
#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 */
unsigned short n_flags; /* copy of flags from filhdr */
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_ptr _n._n_nptr[1]
#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 ((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 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, 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 N_BTMASK (0x1f)
#define N_TMASK (0x60)
#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_tvfill; /* tv fill value */
unsigned short x_tvlen; /* length of .tv */
unsigned short x_tvran[2]; /* tv range */
} x_tv; /* info about .tv section (in auxent of symbol .tv)) */
/******************************************
* I960-specific *2nd* aux. entry formats
******************************************/
struct {
/* This is a very old typo that keeps getting propagated. */
#define x_stdindx x_stindx
long x_stindx; /* sys. table entry */
} x_sc; /* system call entry */
struct {
unsigned long x_balntry; /* BAL entry point */
} x_bal; /* BAL-callable function */
struct {
unsigned long x_timestamp; /* time stamp */
char x_idstring[20]; /* producer identity string */
} x_ident; /* Producer ident info */
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 */
};
/* Relevent values for r_type and i960. Would someone please document them */
#define R_RELLONG (0x11) /* Direct 32-bit relocation */
#define R_IPRSHORT (0x18)
#define R_IPRMED (0x19) /* 24-bit ip-relative relocation */
#define R_IPRLONG (0x1a)
#define R_OPTCALL (0x1b) /* 32-bit optimizable call (leafproc/sysproc) */
#define R_OPTCALLX (0x1c) /* 64-bit optimizable call (leafproc/sysproc) */
#define R_GETSEG (0x1d)
#define R_GETPA (0x1e)
#define R_TAGWORD (0x1f)
#define RELOC struct reloc
#define RELSZ sizeof(RELOC)
#define DEFAULT_DATA_SECTION_ALIGNMENT 4
#define DEFAULT_BSS_SECTION_ALIGNMENT 4
#define DEFAULT_TEXT_SECTION_ALIGNMENT 16
/* For new sections we havn't heard of before */
#define DEFAULT_SECTION_ALIGNMENT 4
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