/*** 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" /* * 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