249 lines
7.2 KiB
C
249 lines
7.2 KiB
C
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/*** coff information for Apollo M68K */
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/********************** FILE HEADER **********************/
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struct external_filehdr {
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char f_magic[2]; /* magic number */
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char f_nscns[2]; /* number of sections */
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char f_timdat[4]; /* time & date stamp */
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char f_symptr[4]; /* file pointer to symtab */
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char f_nsyms[4]; /* number of symtab entries */
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char f_opthdr[2]; /* sizeof(optional hdr) */
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char f_flags[2]; /* flags */
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};
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/* Motorola 68000/68008/68010/68020 */
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#define MC68MAGIC 0520
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#define MC68KWRMAGIC 0520 /* writeable text segments */
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#define MC68TVMAGIC 0521
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#define MC68KROMAGIC 0521 /* readonly shareable text segments */
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#define MC68KPGMAGIC 0522 /* demand paged text segments */
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#define M68MAGIC 0210
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#define M68TVMAGIC 0211
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/* Apollo 68000-based machines have a different magic number. This comes
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* from /usr/include/apollo/filehdr.h
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*/
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#define APOLLOM68KMAGIC 0627
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#define OMAGIC M68MAGIC
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#define M68KBADMAG(x) (((x).f_magic!=MC68MAGIC) && ((x).f_magic!=MC68KWRMAGIC) && ((x).f_magic!=MC68TVMAGIC) && \
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((x).f_magic!=MC68KROMAGIC) && ((x).f_magic!=MC68KPGMAGIC) && ((x).f_magic!=M68MAGIC) && ((x).f_magic!=M68TVMAGIC) && \
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((x).f_magic!=APOLLOM68KMAGIC) )
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#define FILHDR struct external_filehdr
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#define FILHSZ sizeof(FILHDR)
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/********************** AOUT "OPTIONAL HEADER" **********************/
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typedef struct
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{
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char magic[2]; /* type of file */
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char vstamp[2]; /* version stamp */
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char tsize[4]; /* text size in bytes, padded to FW bdry*/
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char dsize[4]; /* initialized data " " */
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char bsize[4]; /* uninitialized data " " */
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char entry[4]; /* entry pt. */
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char text_start[4]; /* base of text used for this file */
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char data_start[4]; /* base of data used for this file */
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char o_sri[4]; /* Apollo specific - .sri data pointer */
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char o_inlib[4]; /* Apollo specific - .inlib data pointer */
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char vid[8]; /* Apollo specific - 64 bit version ID */
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}
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AOUTHDR;
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#define APOLLO_COFF_VERSION_NUMBER 1 /* the value of the aouthdr magic */
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#define AOUTHDRSZ (sizeof(AOUTHDR))
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#define AOUTSZ (sizeof(AOUTHDR))
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/********************** SECTION HEADER **********************/
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struct external_scnhdr {
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/* Apollo allow for larger section names by allowing it to be in
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* the string table.
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*/
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char s_name[8];
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char s_paddr[4]; /* physical address, aliased s_nlib */
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char s_vaddr[4]; /* virtual address */
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char s_size[4]; /* section size */
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char s_scnptr[4]; /* file ptr to raw data for section */
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char s_relptr[4]; /* file ptr to relocation */
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char s_lnnoptr[4]; /* file ptr to line numbers */
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char s_nreloc[2]; /* number of relocation entries */
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char s_nlnno[2]; /* number of line number entries*/
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char s_flags[4]; /* flags */
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};
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/* If s_zeores is all zeroes, s_offset gives the real location of the name
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* in the string table.
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*/
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#define s_zeroes section_name.s_name
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#define s_offset (section_name.s_name+4)
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/*
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* names of "special" sections
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*/
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#define _TEXT ".text"
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#define _DATA ".data"
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#define _BSS ".bss"
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#define _TV ".tv"
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#define _INIT ".init"
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#define _FINI ".fini"
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#define _LINES ".lines"
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#define _BLOCKS ".blocks"
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#define _SRI ".sri" /* Static Resource Information (systype,
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et al.) */
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#define _MIR ".mir" /* Module Information Records */
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#define _APTV ".aptv" /* Apollo-style transfer vectors. */
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#define _INLIB ".inlib" /* Shared Library information */
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#define _RWDI ".rwdi" /* Read/write data initialization directives for
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compressed sections */
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#define _UNWIND ".unwind" /* Stack unwind information */
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#define SCNHDR struct external_scnhdr
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#define SCNHSZ sizeof(SCNHDR)
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/********************** LINE NUMBERS **********************/
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/* 1 line number entry for every "breakpointable" source line in a section.
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* Line numbers are grouped on a per function basis; first entry in a function
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* grouping will have l_lnno = 0 and in place of physical address will be the
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* symbol table index of the function name.
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*/
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struct external_lineno {
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union {
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char l_symndx[4]; /* function name symbol index, iff l_lnno == 0*/
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char l_paddr[4]; /* (physical) address of line number */
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} l_addr;
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char l_lnno[2]; /* line number */
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};
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#define LINENO struct external_lineno
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#define LINESZ sizeof(LINENO)
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/********************** SYMBOLS **********************/
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#define E_SYMNMLEN 8 /* # characters in a symbol name */
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#define E_FILNMLEN 14 /* # characters in a file name */
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#define E_DIMNUM 4 /* # array dimensions in auxiliary entry */
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struct external_syment
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{
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union {
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char e_name[E_SYMNMLEN];
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struct {
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char e_zeroes[4];
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char e_offset[4];
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} e;
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} e;
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char e_value[4];
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char e_scnum[2];
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char e_type[2];
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char e_sclass[1];
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char e_numaux[1];
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};
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#define N_BTMASK (017)
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#define N_TMASK (060)
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#define N_BTSHFT (4)
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#define N_TSHIFT (2)
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union external_auxent {
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struct {
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char x_tagndx[4]; /* str, un, or enum tag indx */
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union {
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struct {
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char x_lnno[2]; /* declaration line number */
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char x_size[2]; /* str/union/array size */
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} x_lnsz;
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char x_fsize[4]; /* size of function */
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} x_misc;
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union {
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struct { /* if ISFCN, tag, or .bb */
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char x_lnnoptr[4]; /* ptr to fcn line # */
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char x_endndx[4]; /* entry ndx past block end */
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} x_fcn;
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struct { /* if ISARY, up to 4 dimen. */
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char x_dimen[E_DIMNUM][2];
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} x_ary;
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} x_fcnary;
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char x_tvndx[2]; /* tv index */
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} x_sym;
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union {
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char x_fname[E_FILNMLEN];
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struct {
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char x_zeroes[4];
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char x_offset[4];
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} x_n;
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} x_file;
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struct {
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char x_scnlen[4]; /* section length */
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char x_nreloc[2]; /* # relocation entries */
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char x_nlinno[2]; /* # line numbers */
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} x_scn;
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struct {
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char x_tvfill[4]; /* tv fill value */
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char x_tvlen[2]; /* length of .tv */
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char x_tvran[2][2]; /* tv range */
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} x_tv; /* info about .tv section (in auxent of symbol .tv)) */
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};
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#define SYMENT struct external_syment
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#define SYMESZ 18
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#define AUXENT union external_auxent
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#define AUXESZ 18
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/********************** RELOCATION DIRECTIVES **********************/
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struct external_reloc {
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char r_vaddr[4];
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char r_symndx[4];
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char r_type[2];
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#ifdef M68K_COFF_OFFSET
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char r_offset[4];
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#endif
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};
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#define RELOC struct external_reloc
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#define RELSZ sizeof(struct external_reloc)
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/* Apollo specific STYP flags */
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#define STYP_RELOCATED_NOT_LOADED 0x00010000 /* Section is relocated normally during linking, but need
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not be loaded during program execution */
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#define STYP_DEBUG 0x00020000 /* debug section */
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#define STYP_OVERLAY 0x00040000 /* Section is overlayed */
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#define STYP_INSTRUCTION 0x00200000 /* Section contains executable code */
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#define STYP_ZERO 0x00800000 /* Section is initialized to zero */
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#define STYP_INSTALLED 0x02000000 /* Section should be installable in KGT */
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#define STYP_LOOK_INSTALLED 0x04000000 /* Look for section in KGT */
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#define STYP_SECALIGN1 0x08000000 /* Specially aligned section */
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#define STYP_SECALIGN2 0x10000000 /* " " " */
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#define STYP_COMPRESSED 0x20000000 /* No section data per se (s_scnptr = 0), but there are
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initialization directives for it in .rwdi section
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(used in conjunction with STYP_BSS) */
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