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Diffstat (limited to 'include/coff-mips.h')
| -rwxr-xr-x | include/coff-mips.h | 427 |
1 files changed, 427 insertions, 0 deletions
diff --git a/include/coff-mips.h b/include/coff-mips.h new file mode 100755 index 0000000..b50fe48 --- /dev/null +++ b/include/coff-mips.h @@ -0,0 +1,427 @@ +/* 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 |