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- /* COFF spec for AMD 290*0
- Contributed by David Wood @ New York University.
- */
-
- #ifndef AMD
- # define AMD
- #endif
-
- /****************************************************************/
-
- /*
- ** File Header and related definitions
- */
-
- 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 */
- };
-
- #define FILHDR struct external_filehdr
- #define FILHSZ 20
-
- /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/
-
- /*
- ** Magic numbers for Am29000
- ** (AT&T will assign the "real" magic number)
- */
-
- #define SIPFBOMAGIC 0572 /* Am29000 (Byte 0 is MSB) */
- #define SIPRBOMAGIC 0573 /* Am29000 (Byte 0 is LSB) */
-
-
- #define A29K_MAGIC_BIG SIPFBOMAGIC
- #define A29K_MAGIC_LITTLE SIPRBOMAGIC
- #define A29KBADMAG(x) (((x).f_magic!=A29K_MAGIC_BIG) && \
- ((x).f_magic!=A29K_MAGIC_LITTLE))
-
- #define OMAGIC A29K_MAGIC_BIG
- /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/
-
- /*
- ** File header flags currently known to us.
- **
- ** Am29000 will use the F_AR32WR and F_AR32W flags to indicate
- ** the byte ordering in the file.
- */
-
- /*--------------------------------------------------------------*/
-
- /*
- ** Optional (a.out) header
- */
-
- typedef struct external_aouthdr
- {
- 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 28
- #define AOUTHDRSZ 28
-
- /* aouthdr magic numbers */
- #define NMAGIC 0410 /* separate i/d executable */
- #define SHMAGIC 0406 /* NYU/Ultra3 shared data executable
- (writable text) */
-
- #define _ETEXT "_etext"
-
- /*--------------------------------------------------------------*/
-
- /*
- ** Section header and related definitions
- */
-
- 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 */
- };
-
- #define SCNHDR struct external_scnhdr
- #define SCNHSZ 40
-
- /*
- * names of "special" sections
- */
- #define _TEXT ".text"
- #define _DATA ".data"
- #define _BSS ".bss"
- #define _LIT ".lit"
-
- /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/
-
- /*
- ** Section types - with additional section type for global
- ** registers which will be relocatable for the Am29000.
- **
- ** In instances where it is necessary for a linker to produce an
- ** output file which contains text or data not based at virtual
- ** address 0, e.g. for a ROM, then the linker should accept
- ** address base information as command input and use PAD sections
- ** to skip over unused addresses.
- */
-
- #define STYP_BSSREG 0x1200 /* Global register area (like STYP_INFO) */
- #define STYP_ENVIR 0x2200 /* Environment (like STYP_INFO) */
- #define STYP_ABS 0x4000 /* Absolute (allocated, not reloc, loaded) */
-
- /*--------------------------------------------------------------*/
-
- /*
- ** Relocation information declaration and related definitions
- */
-
- struct external_reloc {
- char r_vaddr[4]; /* (virtual) address of reference */
- char r_symndx[4]; /* index into symbol table */
- char r_type[2]; /* relocation type */
- };
-
- #define RELOC struct external_reloc
- #define RELSZ 10 /* sizeof (RELOC) */
-
- /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/
-
- /*
- ** Relocation types for the Am29000
- */
-
- #define R_ABS 0 /* reference is absolute */
-
- #define R_IREL 030 /* instruction relative (jmp/call) */
- #define R_IABS 031 /* instruction absolute (jmp/call) */
- #define R_ILOHALF 032 /* instruction low half (const) */
- #define R_IHIHALF 033 /* instruction high half (consth) part 1 */
- #define R_IHCONST 034 /* instruction high half (consth) part 2 */
- /* constant offset of R_IHIHALF relocation */
- #define R_BYTE 035 /* relocatable byte value */
- #define R_HWORD 036 /* relocatable halfword value */
- #define R_WORD 037 /* relocatable word value */
-
- #define R_IGLBLRC 040 /* instruction global register RC */
- #define R_IGLBLRA 041 /* instruction global register RA */
- #define R_IGLBLRB 042 /* instruction global register RB */
-
- /*
- NOTE:
- All the "I" forms refer to 29000 instruction formats. The linker is
- expected to know how the numeric information is split and/or aligned
- within the instruction word(s). R_BYTE works for instructions, too.
-
- If the parameter to a CONSTH instruction is a relocatable type, two
- relocation records are written. The first has an r_type of R_IHIHALF
- (33 octal) and a normal r_vaddr and r_symndx. The second relocation
- record has an r_type of R_IHCONST (34 octal), a normal r_vaddr (which
- is redundant), and an r_symndx containing the 32-bit constant offset
- to the relocation instead of the actual symbol table index. This
- second record is always written, even if the constant offset is zero.
- The constant fields of the instruction are set to zero.
- */
-
- /*--------------------------------------------------------------*/
-
- /*
- ** Line number entry declaration and related definitions
- */
-
- 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 /* sizeof (LINENO) */
-
- /*--------------------------------------------------------------*/
-
- /*
- ** Symbol entry declaration and related definitions
- */
-
- #define E_SYMNMLEN 8 /* Number of characters in a symbol name */
-
- 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 SYMENT struct external_syment
- #define SYMESZ 18
-
- /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/
-
- /*
- ** Storage class definitions - new classes for global registers.
- */
-
- #define C_GLBLREG 19 /* global register */
- #define C_EXTREG 20 /* external global register */
- #define C_DEFREG 21 /* ext. def. of global register */
-
-
- /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/
-
- /*
- ** Derived symbol mask/shifts.
- */
-
- #define N_BTMASK (0xf)
- #define N_BTSHFT (4)
- #define N_TMASK (0x30)
- #define N_TSHIFT (2)
-
- /*--------------------------------------------------------------*/
-
- /*
- ** Auxiliary symbol table entry declaration and related
- ** definitions.
- */
-
- #define E_FILNMLEN 14 /* # characters in a file name */
- #define E_DIMNUM 4 /* # array dimensions in auxiliary entry */
-
- 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 AUXENT union external_auxent
- #define AUXESZ 18
-