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Diffstat (limited to 'include/coff/a29k.h')
| -rw-r--r-- | include/coff/a29k.h | 305 |
1 files changed, 305 insertions, 0 deletions
diff --git a/include/coff/a29k.h b/include/coff/a29k.h new file mode 100644 index 0000000..8042d51 --- /dev/null +++ b/include/coff/a29k.h @@ -0,0 +1,305 @@ +/* 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 sizeof (FILHDR) + +/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/ + +/* +** 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 (sizeof(AOUTHDR)) +#define AOUTHDRSZ (sizeof(AOUTHDR)) + +/* 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 sizeof (SCNHDR) + +/* + * names of "special" sections + */ +#define _TEXT ".text" +#define _DATA ".data" +#define _BSS ".bss" + +/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/ + +/* +** 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) */ +#define STYP_LIT 0x8020 /* Literal data (like STYP_TEXT) */ + +/*--------------------------------------------------------------*/ + +/* +** 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 sizeof(SYMENT) + +/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/ + +/* +** 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 |