| /* 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 |