diff options
Diffstat (limited to 'include/coff/i386.h')
| -rw-r--r-- | include/coff/i386.h | 316 |
1 files changed, 316 insertions, 0 deletions
diff --git a/include/coff/i386.h b/include/coff/i386.h new file mode 100644 index 0000000..0683692 --- /dev/null +++ b/include/coff/i386.h @@ -0,0 +1,316 @@ +/*** coff information for M68K */ + + +/********************** FILE HEADER **********************/ + +struct external_filehdr { + char f_magic[2]; /* magic number */ + char f_nscns[2]; /* number of sections */ + char f_timdat[4]; /* time & date stamp */ + char f_symptr[4]; /* file pointer to symtab */ + char f_nsyms[4]; /* number of symtab entries */ + char f_opthdr[2]; /* sizeof(optional hdr) */ + char f_flags[2]; /* 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 I386BADMAG(x) (((x).f_magic!=I386MAGIC)) + + +#define FILHDR struct external_filehdr +#define FILHSZ sizeof(FILHDR) + + +/********************** AOUT "OPTIONAL HEADER" **********************/ + + +typedef struct +{ + char magic[2]; /* type of file */ + char vstamp[2]; /* version stamp */ + char tsize[4]; /* text size in bytes, padded to FW bdry*/ + char dsize[4]; /* initialized data " " */ + char bsize[4]; /* uninitialized data " " */ + char entry[4]; /* entry pt. */ + char text_start[4]; /* base of text used for this file */ + char data_start[4]; /* base of data used for this file */ +} +AOUTHDR; + +#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_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 */ + +/********************** SECTION HEADER **********************/ + + +struct external_scnhdr { + char s_name[8]; /* section name */ + char s_paddr[4]; /* physical address, aliased s_nlib */ + char s_vaddr[4]; /* virtual address */ + char s_size[4]; /* section size */ + char s_scnptr[4]; /* file ptr to raw data for section */ + char s_relptr[4]; /* file ptr to relocation */ + char s_lnnoptr[4]; /* file ptr to line numbers */ + char s_nreloc[2]; /* number of relocation entries */ + char s_nlnno[2]; /* number of line number entries*/ + char s_flags[4]; /* flags */ +}; + +/* + * names of "special" sections + */ +#define _TEXT ".text" +#define _DATA ".data" +#define _BSS ".bss" +#define _COMMENT ".comment" + +/* + * 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 external_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 external_lineno { + union { + char l_symndx[4]; /* function name symbol index, iff l_lnno == 0*/ + char l_paddr[4]; /* (physical) address of line number */ + } l_addr; + char l_lnno[2]; /* line number */ +}; + + +#define LINENO struct external_lineno +#define LINESZ 6 + + +/********************** 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 { + char e_zeroes[4]; + char e_offset[4]; + } e; + } e; + char e_value[4]; + char e_scnum[2]; + char e_type[2]; + char e_sclass[1]; + char e_numaux[1]; +}; + + +/*#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 (0xf) +#define N_TMASK (0x30) +#define N_BTSHFT (4) +#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 external_auxent { + struct { + char x_tagndx[4]; /* str, un, or enum tag indx */ + union { + struct { + char x_lnno[2]; /* declaration line number */ + char x_size[2]; /* str/union/array size */ + } x_lnsz; + char x_fsize[4]; /* size of function */ + } x_misc; + union { + struct { /* if ISFCN, tag, or .bb */ + char x_lnnoptr[4]; /* ptr to fcn line # */ + char x_endndx[4]; /* entry ndx past block end */ + } x_fcn; + struct { /* if ISARY, up to 4 dimen. */ + char x_dimen[E_DIMNUM][2]; + } x_ary; + } x_fcnary; + char x_tvndx[2]; /* tv index */ + } x_sym; + + union { + char x_fname[E_FILNMLEN]; + struct { + char x_zeroes[4]; + char x_offset[4]; + } x_n; + } x_file; + + struct { + char x_scnlen[4]; /* section length */ + char x_nreloc[2]; /* # relocation entries */ + char x_nlinno[2]; /* # line numbers */ + } x_scn; + + struct { + char x_tvfill[4]; /* tv fill value */ + char x_tvlen[2]; /* length of .tv */ + char x_tvran[2][2]; /* tv range */ + } x_tv; /* info about .tv section (in auxent of symbol .tv)) */ + + +}; + +#define SYMENT struct external_syment +#define SYMESZ 18 +#define AUXENT union external_auxent +#define AUXESZ 18 + + +# define _ETEXT "etext" + + +/********************** RELOCATION DIRECTIVES **********************/ + + + +struct external_reloc { + char r_vaddr[4]; + char r_symndx[4]; + char r_type[2]; +}; + + +#define RELOC struct external_reloc +#define RELSZ 10 + +#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 |