303 lines
8.5 KiB
C
Executable file
303 lines
8.5 KiB
C
Executable file
/* 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))
|
|
|
|
|
|
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/
|
|
|
|
/*
|
|
** 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))
|
|
|
|
/* 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 SYMNMLEN 8 /* Number of characters in a symbol name */
|
|
|
|
struct external_syment
|
|
{
|
|
union {
|
|
char e_name[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 FILNMLEN 14 /* # characters in a file name */
|
|
#define 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[DIMNUM][2];
|
|
} x_ary;
|
|
} x_fcnary;
|
|
char x_tvndx[2]; /* tv index */
|
|
} x_sym;
|
|
|
|
union {
|
|
char x_fname[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
|