[binutils.git] / include / aout64.h

/* `a.out' object-file definitions, including extensions to 64-bit fields */

#ifndef __A_OUT_64_H__
#define __A_OUT_64_H__

/* This is the layout on disk of the 32-bit or 64-bit exec header. */

struct external_exec 
{
  bfd_byte e_info[4];		/* magic number and stuff		*/
  bfd_byte e_text[BYTES_IN_WORD]; /* length of text section in bytes	*/
  bfd_byte e_data[BYTES_IN_WORD]; /* length of data section in bytes	*/
  bfd_byte e_bss[BYTES_IN_WORD]; /* length of bss area in bytes 		*/
  bfd_byte e_syms[BYTES_IN_WORD]; /* length of symbol table in bytes 	*/
  bfd_byte e_entry[BYTES_IN_WORD]; /* start address 			*/
  bfd_byte e_trsize[BYTES_IN_WORD]; /* length of text relocation info	*/
  bfd_byte e_drsize[BYTES_IN_WORD]; /* length of data relocation info 	*/
};

#define	EXEC_BYTES_SIZE	(4 + BYTES_IN_WORD * 7)

/* Magic numbers for a.out files */

#if ARCH_SIZE==64
#define OMAGIC 0x1001		/* Code indicating object file  */
#define ZMAGIC 0x1002		/* Code indicating demand-paged executable.  */
#define NMAGIC 0x1003		/* Code indicating pure executable.  */
#else
#define OMAGIC 0407		/* ...object file or impure executable.  */
#define NMAGIC 0410		/* Code indicating pure executable.  */
#define ZMAGIC 0413		/* Code indicating demand-paged executable.  */
#endif

#define N_BADMAG(x)	  (N_MAGIC(x) != OMAGIC		\
			&& N_MAGIC(x) != NMAGIC		\
  			&& N_MAGIC(x) != ZMAGIC)

/* By default, segment size is constant.  But some machines override this
   to be a function of the a.out header (e.g. machine type).  */
#ifndef	N_SEGSIZE
#define	N_SEGSIZE(x)	SEGMENT_SIZE
#endif
\f
/* Virtual memory address of the text section.
   This is getting very complicated.  A good reason to discard a.out format
   for something that specifies these fields explicitly.  But til then...

   * OMAGIC and NMAGIC files:
       (object files: text for "relocatable addr 0" right after the header)
       start at 0, offset is EXEC_BYTES_SIZE, size as stated.
   * The text address, offset, and size of ZMAGIC files depend
     on the entry point of the file:
     * entry point below TEXT_START_ADDR:
       (hack for SunOS shared libraries)
       start at 0, offset is 0, size as stated.
     * If N_HEADER_IN_TEXT(x) is true (which defaults to being the
       case when the entry point is EXEC_BYTES_SIZE or further into a page):
       no padding is needed; text can start after exec header.  Sun
       considers the text segment of such files to include the exec header;
       for BFD's purposes, we don't, which makes more work for us.
       start at TEXT_START_ADDR + EXEC_BYTES_SIZE, offset is EXEC_BYTES_SIZE,
       size as stated minus EXEC_BYTES_SIZE.
     * If N_HEADER_IN_TEXT(x) is false (which defaults to being the case when
       the entry point is less than EXEC_BYTES_SIZE into a page (e.g. page
       aligned)): (padding is needed so that text can start at a page boundary)
       start at TEXT_START_ADDR, offset PAGE_SIZE, size as stated.

    Specific configurations may want to hardwire N_HEADER_IN_TEXT,
    for efficiency or to allow people to play games with the entry point.
    In that case, you would #define N_HEADER_IN_TEXT(x) as 1 for sunos,
    and as 0 for most other hosts (Sony News, Vax Ultrix, etc).
    (Do this in the appropriate bfd target file.)
    (The default is a heuristic that will break if people try changing
    the entry point, perhaps with the ld -e flag.)
    */

#ifndef N_HEADER_IN_TEXT
#define N_HEADER_IN_TEXT(x) (((x).a_entry & (PAGE_SIZE-1)) >= EXEC_BYTES_SIZE)
#endif

#ifndef N_TXTADDR
#define N_TXTADDR(x) \
    ( (N_MAGIC(x) != ZMAGIC)? \
        0:					/* object file or NMAGIC */\
        ((x).a_entry < TEXT_START_ADDR)? \
	    0:					/* shared lib */\
	(N_HEADER_IN_TEXT(x)  ?	\
	    TEXT_START_ADDR + EXEC_BYTES_SIZE:	/* no padding */\
	    TEXT_START_ADDR			/* a page of padding */\
        )	\
    )
#endif

/* Offset in an a.out of the start of the text section. */

#define N_TXTOFF(x)	\
    ( (N_MAGIC(x) != ZMAGIC)? \
            EXEC_BYTES_SIZE:			/* object file or NMAGIC */\
        ((x).a_entry < TEXT_START_ADDR)? \
	    0:					/* shared lib */\
	(N_HEADER_IN_TEXT(x)  ?	\
	    EXEC_BYTES_SIZE:			/* no padding */\
	    PAGE_SIZE				/* a page of padding */\
        )	\
    )

/* Size of the text section.  It's always as stated, except that we
   offset it to `undo' the adjustment to N_TXTADDR and N_TXTOFF
   for NMAGIC/ZMAGIC files that nominally include the exec header
   as part of the first page of text.  (BFD doesn't consider the
   exec header to be part of the text segment.)  */

#define	N_TXTSIZE(x) \
    ( (N_MAGIC(x) != ZMAGIC)? \
            (x).a_text:				/* object file or NMAGIC */\
        ((x).a_entry < TEXT_START_ADDR)? \
	    (x).a_text:				/* shared lib */\
	(N_HEADER_IN_TEXT(x)  ?	\
	    (x).a_text - EXEC_BYTES_SIZE:	/* no padding */\
	    (x).a_text				/* a page of padding */\
        )	\
    )

/* The address of the data segment in virtual memory.
   It is the text segment address, plus text segment size, rounded
   up to a N_SEGSIZE boundary for pure or pageable files. */

#define N_DATADDR(x) \
    (N_MAGIC(x)==OMAGIC? (N_TXTADDR(x)+N_TXTSIZE(x)) \
     :  (N_SEGSIZE(x) + ((N_TXTADDR(x)+N_TXTSIZE(x)-1) & ~(N_SEGSIZE(x)-1))))

/* The address of the BSS segment -- immediately after the data segment.  */

#define N_BSSADDR(x)	(N_DATADDR(x) + (x).a_data)

/* Offsets of the various portions of the file after the text segment.  */

#define N_DATOFF(x)	( N_TXTOFF(x) + N_TXTSIZE(x) )
#define N_TRELOFF(x)	( N_DATOFF(x) + (x).a_data )
#define N_DRELOFF(x)	( N_TRELOFF(x) + (x).a_trsize )
#define N_SYMOFF(x)	( N_DRELOFF(x) + (x).a_drsize )
#define N_STROFF(x)	( N_SYMOFF(x) + (x).a_syms )
\f
/* Symbols */
struct external_nlist {
  bfd_byte e_strx[BYTES_IN_WORD];	/* index into string table of name */
  bfd_byte e_type[1];			/* type of symbol */
  bfd_byte e_other[1];			/* misc info (usually empty) */
  bfd_byte e_desc[2];			/* description field */
  bfd_byte e_value[BYTES_IN_WORD];	/* value of symbol */
};

#define EXTERNAL_NLIST_SIZE (BYTES_IN_WORD+4+BYTES_IN_WORD)

struct internal_nlist {
  unsigned long n_strx;			/* index into string table of name */
  unsigned char n_type;			/* type of symbol */
  unsigned char n_other;		/* misc info (usually empty) */
  unsigned short n_desc;		/* description field */
  bfd_vma n_value;			/* value of symbol */
};

/* The n_type field is the symbol type, containing:  */

#define N_UNDF	0	/* Undefined symbol */
#define N_ABS 	2	/* Absolute symbol -- defined at particular addr */
#define N_TEXT 	4	/* Text sym -- defined at offset in text seg */
#define N_DATA 	6	/* Data sym -- defined at offset in data seg */
#define N_BSS 	8	/* BSS  sym -- defined at offset in zero'd seg */
#define	N_COMM	0x12	/* Common symbol (visible after shared lib dynlink) */
#define N_FN	0x1f	/* File name of .o file */
#define	N_FN_SEQ 0x0C	/* N_FN from Sequent compilers (sigh) */
/* Note: N_EXT can only be usefully OR-ed with N_UNDF, N_ABS, N_TEXT,
   N_DATA, or N_BSS.  When the low-order bit of other types is set,
   (e.g. N_WARNING versus N_FN), they are two different types.  */
#define N_EXT 	1	/* External symbol (as opposed to local-to-this-file) */
#define N_TYPE  0x1e
#define N_STAB 	0xe0	/* If any of these bits are on, it's a debug symbol */

#define N_INDR 0x0a

/* The following symbols refer to set elements.
   All the N_SET[ATDB] symbols with the same name form one set.
   Space is allocated for the set in the text section, and each set
   elements value is stored into one word of the space.
   The first word of the space is the length of the set (number of elements).

   The address of the set is made into an N_SETV symbol
   whose name is the same as the name of the set.
   This symbol acts like a N_DATA global symbol
   in that it can satisfy undefined external references.  */

/* These appear as input to LD, in a .o file.  */
#define	N_SETA	0x14		/* Absolute set element symbol */
#define	N_SETT	0x16		/* Text set element symbol */
#define	N_SETD	0x18		/* Data set element symbol */
#define	N_SETB	0x1A		/* Bss set element symbol */

/* This is output from LD.  */
#define N_SETV	0x1C		/* Pointer to set vector in data area.  */

/* Warning symbol. The text gives a warning message, the next symbol
   in the table will be undefined. When the symbol is referenced, the
   message is printed.  */

#define	N_WARNING 0x1e

/* Relocations 

  There	are two types of relocation flavours for a.out systems,
  standard and extended. The standard form is used on systems where the
  instruction has room for all the bits of an offset to the operand, whilst
  the extended form is used when an address operand has to be split over n
  instructions. Eg, on the 68k, each move instruction can reference
  the target with a displacement of 16 or 32 bits. On the sparc, move
  instructions use an offset of 14 bits, so the offset is stored in
  the reloc field, and the data in the section is ignored.
*/

/* This structure describes a single relocation to be performed.
   The text-relocation section of the file is a vector of these structures,
   all of which apply to the text section.
   Likewise, the data-relocation section applies to the data section.  */

struct reloc_std_external {
  bfd_byte	r_address[BYTES_IN_WORD];	/* offset of of data to relocate 	*/
  bfd_byte r_index[3];	/* symbol table index of symbol 	*/
  bfd_byte r_type[1];	/* relocation type			*/
};

#define	RELOC_STD_BITS_PCREL_BIG	0x80
#define	RELOC_STD_BITS_PCREL_LITTLE	0x01

#define	RELOC_STD_BITS_LENGTH_BIG	0x60
#define	RELOC_STD_BITS_LENGTH_SH_BIG	5	/* To shift to units place */
#define	RELOC_STD_BITS_LENGTH_LITTLE	0x06
#define	RELOC_STD_BITS_LENGTH_SH_LITTLE	1

#define	RELOC_STD_BITS_EXTERN_BIG	0x10
#define	RELOC_STD_BITS_EXTERN_LITTLE	0x08

#define	RELOC_STD_BITS_BASEREL_BIG	0x08
#define	RELOC_STD_BITS_BASEREL_LITTLE	0x08

#define	RELOC_STD_BITS_JMPTABLE_BIG	0x04
#define	RELOC_STD_BITS_JMPTABLE_LITTLE	0x04

#define	RELOC_STD_BITS_RELATIVE_BIG	0x02
#define	RELOC_STD_BITS_RELATIVE_LITTLE	0x02

#define	RELOC_STD_SIZE	(BYTES_IN_WORD + 3 + 1)		/* Bytes per relocation entry */

struct reloc_std_internal
{
  bfd_vma r_address;		/* Address (within segment) to be relocated.  */
  /* The meaning of r_symbolnum depends on r_extern.  */
  unsigned int r_symbolnum:24;
  /* Nonzero means value is a pc-relative offset
     and it should be relocated for changes in its own address
     as well as for changes in the symbol or section specified.  */
  unsigned int r_pcrel:1;
  /* Length (as exponent of 2) of the field to be relocated.
     Thus, a value of 2 indicates 1<<2 bytes.  */
  unsigned int r_length:2;
  /* 1 => relocate with value of symbol.
     r_symbolnum is the index of the symbol
     in files the symbol table.
     0 => relocate with the address of a segment.
     r_symbolnum is N_TEXT, N_DATA, N_BSS or N_ABS
     (the N_EXT bit may be set also, but signifies nothing).  */
  unsigned int r_extern:1;
  /* The next three bits are for SunOS shared libraries, and seem to
     be undocumented.  */
  unsigned int r_baserel:1;	/* Linkage table relative */
  unsigned int r_jmptable:1;	/* pc-relative to jump table */
  unsigned int r_relative:1;	/* "relative relocation" */
  /* unused */
  unsigned int r_pad:1;		/* Padding -- set to zero */
};


/* EXTENDED RELOCS  */

struct reloc_ext_external {
  bfd_byte r_address[BYTES_IN_WORD];	/* offset of of data to relocate 	*/
  bfd_byte r_index[3];	/* symbol table index of symbol 	*/
  bfd_byte r_type[1];	/* relocation type			*/
  bfd_byte r_addend[BYTES_IN_WORD];	/* datum addend				*/
};

#define	RELOC_EXT_BITS_EXTERN_BIG	0x80
#define	RELOC_EXT_BITS_EXTERN_LITTLE	0x01

#define	RELOC_EXT_BITS_TYPE_BIG		0x1F
#define	RELOC_EXT_BITS_TYPE_SH_BIG	0
#define	RELOC_EXT_BITS_TYPE_LITTLE	0xF8
#define	RELOC_EXT_BITS_TYPE_SH_LITTLE	3

/* Bytes per relocation entry */
#define	RELOC_EXT_SIZE	(BYTES_IN_WORD + 3 + 1 + BYTES_IN_WORD)

enum reloc_type
{
  /* simple relocations */
  RELOC_8,			/* data[0:7] = addend + sv 		*/
  RELOC_16,			/* data[0:15] = addend + sv 		*/
  RELOC_32,			/* data[0:31] = addend + sv 		*/
  /* pc-rel displacement */
  RELOC_DISP8,			/* data[0:7] = addend - pc + sv 	*/
  RELOC_DISP16,			/* data[0:15] = addend - pc + sv 	*/
  RELOC_DISP32,			/* data[0:31] = addend - pc + sv 	*/
  /* Special */
  RELOC_WDISP30,		/* data[0:29] = (addend + sv - pc)>>2 	*/
  RELOC_WDISP22,		/* data[0:21] = (addend + sv - pc)>>2 	*/
  RELOC_HI22,			/* data[0:21] = (addend + sv)>>10 	*/
  RELOC_22,			/* data[0:21] = (addend + sv) 		*/
  RELOC_13,			/* data[0:12] = (addend + sv)		*/
  RELOC_LO10,			/* data[0:9] = (addend + sv)		*/
  RELOC_SFA_BASE,		
  RELOC_SFA_OFF13,
  /* P.I.C. (base-relative) */
  RELOC_BASE10,  		/* Not sure - maybe we can do this the */
  RELOC_BASE13,			/* right way now */
  RELOC_BASE22,
  /* for some sort of pc-rel P.I.C. (?) */
  RELOC_PC10,
  RELOC_PC22,
  /* P.I.C. jump table */
  RELOC_JMP_TBL,
  /* reputedly for shared libraries somehow */
  RELOC_SEGOFF16,
  RELOC_GLOB_DAT,
  RELOC_JMP_SLOT,
  RELOC_RELATIVE,

  RELOC_11,	
  RELOC_WDISP2_14,
  RELOC_WDISP19,
  RELOC_HHI22,			/* data[0:21] = (addend + sv) >> 42     */
  RELOC_HLO10,			/* data[0:9] = (addend + sv) >> 32      */
  
  /* 29K relocation types */
  RELOC_JUMPTARG,
  RELOC_CONST,
  RELOC_CONSTH,
  
  /* All the new ones I can think of *//*v9*/

  RELOC_64,			/* data[0:63] = addend + sv 		*//*v9*/
  RELOC_DISP64,			/* data[0:63] = addend - pc + sv 	*//*v9*/
  RELOC_WDISP21,		/* data[0:20] = (addend + sv - pc)>>2 	*//*v9*/
  RELOC_DISP21,			/* data[0:20] = addend - pc + sv        *//*v9*/
  RELOC_DISP14,			/* data[0:13] = addend - pc + sv 	*//*v9*/
  /* Q .
     What are the other ones,
     Since this is a clean slate, can we throw away the ones we dont
     understand ? Should we sort the values ? What about using a
     microcode format like the 68k ?
     */
  NO_RELOC
  };


struct reloc_internal {
  bfd_vma r_address;		/* offset of of data to relocate 	*/
  long	r_index;		/* symbol table index of symbol 	*/
  enum reloc_type r_type;	/* relocation type			*/
  bfd_vma r_addend;		/* datum addend				*/
};

/* Q.
   Should the length of the string table be 4 bytes or 8 bytes ?

   Q.
   What about archive indexes ?

 */

#endif				/* __A_OUT_64_H__ */
Commit	Line	Data
2d8ffde4 JG	1	/* `a.out' object-file definitions, including extensions to 64-bit fields */
2d8ffde4 JG	2
a3bb31a0 SC	3	#ifndef __A_OUT_64_H__
	4	#define __A_OUT_64_H__
	5
2d8ffde4	6	/* This is the layout on disk of the 32-bit or 64-bit exec header. */
a3bb31a0 SC	7
	8	struct external_exec
	9	{
	10	bfd_byte e_info[4]; /* magic number and stuff */
	11	bfd_byte e_text[BYTES_IN_WORD]; /* length of text section in bytes */
	12	bfd_byte e_data[BYTES_IN_WORD]; /* length of data section in bytes */
	13	bfd_byte e_bss[BYTES_IN_WORD]; /* length of bss area in bytes */
	14	bfd_byte e_syms[BYTES_IN_WORD]; /* length of symbol table in bytes */
	15	bfd_byte e_entry[BYTES_IN_WORD]; /* start address */
	16	bfd_byte e_trsize[BYTES_IN_WORD]; /* length of text relocation info */
	17	bfd_byte e_drsize[BYTES_IN_WORD]; /* length of data relocation info */
	18	};
	19
a3bb31a0 SC	20	#define EXEC_BYTES_SIZE (4 + BYTES_IN_WORD * 7)
a3bb31a0 SC	21
c6fec0bf	22	/* Magic numbers for a.out files */
22ef104a	23
a3bb31a0	24	#if ARCH_SIZE==64
a3bb31a0 SC	25	#define OMAGIC 0x1001 /* Code indicating object file */
	26	#define ZMAGIC 0x1002 /* Code indicating demand-paged executable. */
	27	#define NMAGIC 0x1003 /* Code indicating pure executable. */
	28	#else
c6fec0bf	29	#define OMAGIC 0407 /* ...object file or impure executable. */
a3bb31a0 SC	30	#define NMAGIC 0410 /* Code indicating pure executable. */
	31	#define ZMAGIC 0413 /* Code indicating demand-paged executable. */
	32	#endif
	33
	34	#define N_BADMAG(x) (N_MAGIC(x) != OMAGIC \
	35	&& N_MAGIC(x) != NMAGIC \
	36	&& N_MAGIC(x) != ZMAGIC)
	37
c6fec0bf JG	38	/* By default, segment size is constant. But some machines override this
	39	to be a function of the a.out header (e.g. machine type). */
	40	#ifndef N_SEGSIZE
	41	#define N_SEGSIZE(x) SEGMENT_SIZE
	42	#endif
	43	\f
	44	/* Virtual memory address of the text section.
	45	This is getting very complicated. A good reason to discard a.out format
	46	for something that specifies these fields explicitly. But til then...
	47
	48	* OMAGIC and NMAGIC files:
	49	(object files: text for "relocatable addr 0" right after the header)
	50	start at 0, offset is EXEC_BYTES_SIZE, size as stated.
	51	* The text address, offset, and size of ZMAGIC files depend
	52	on the entry point of the file:
	53	* entry point below TEXT_START_ADDR:
	54	(hack for SunOS shared libraries)
	55	start at 0, offset is 0, size as stated.
27612c29 PB	56	* If N_HEADER_IN_TEXT(x) is true (which defaults to being the
	57	case when the entry point is EXEC_BYTES_SIZE or further into a page):
	58	no padding is needed; text can start after exec header. Sun
c6fec0bf	59	considers the text segment of such files to include the exec header;
27612c29	60	for BFD's purposes, we don't, which makes more work for us.
c6fec0bf JG	61	start at TEXT_START_ADDR + EXEC_BYTES_SIZE, offset is EXEC_BYTES_SIZE,
c6fec0bf JG	62	size as stated minus EXEC_BYTES_SIZE.
27612c29 PB	63	* If N_HEADER_IN_TEXT(x) is false (which defaults to being the case when
	64	the entry point is less than EXEC_BYTES_SIZE into a page (e.g. page
	65	aligned)): (padding is needed so that text can start at a page boundary)
	66	start at TEXT_START_ADDR, offset PAGE_SIZE, size as stated.
	67
	68	Specific configurations may want to hardwire N_HEADER_IN_TEXT,
	69	for efficiency or to allow people to play games with the entry point.
	70	In that case, you would #define N_HEADER_IN_TEXT(x) as 1 for sunos,
	71	and as 0 for most other hosts (Sony News, Vax Ultrix, etc).
	72	(Do this in the appropriate bfd target file.)
	73	(The default is a heuristic that will break if people try changing
	74	the entry point, perhaps with the ld -e flag.)
	75	*/
	76
	77	#ifndef N_HEADER_IN_TEXT
	78	#define N_HEADER_IN_TEXT(x) (((x).a_entry & (PAGE_SIZE-1)) >= EXEC_BYTES_SIZE)
	79	#endif
a3bb31a0	80
c6fec0bf JG	81	#ifndef N_TXTADDR
	82	#define N_TXTADDR(x) \
	83	( (N_MAGIC(x) != ZMAGIC)? \
	84	0: /* object file or NMAGIC */\
	85	((x).a_entry < TEXT_START_ADDR)? \
	86	0: /* shared lib */\
27612c29	87	(N_HEADER_IN_TEXT(x) ? \
c6fec0bf JG	88	TEXT_START_ADDR + EXEC_BYTES_SIZE: /* no padding */\
	89	TEXT_START_ADDR /* a page of padding */\
	90	) \
	91	)
	92	#endif
	93
	94	/* Offset in an a.out of the start of the text section. */
	95
	96	#define N_TXTOFF(x) \
	97	( (N_MAGIC(x) != ZMAGIC)? \
	98	EXEC_BYTES_SIZE: /* object file or NMAGIC */\
	99	((x).a_entry < TEXT_START_ADDR)? \
	100	0: /* shared lib */\
27612c29	101	(N_HEADER_IN_TEXT(x) ? \
c6fec0bf JG	102	EXEC_BYTES_SIZE: /* no padding */\
	103	PAGE_SIZE /* a page of padding */\
	104	) \
	105	)
	106
	107	/* Size of the text section. It's always as stated, except that we
	108	offset it to `undo' the adjustment to N_TXTADDR and N_TXTOFF
	109	for NMAGIC/ZMAGIC files that nominally include the exec header
	110	as part of the first page of text. (BFD doesn't consider the
	111	exec header to be part of the text segment.) */
	112
	113	#define N_TXTSIZE(x) \
	114	( (N_MAGIC(x) != ZMAGIC)? \
	115	(x).a_text: /* object file or NMAGIC */\
	116	((x).a_entry < TEXT_START_ADDR)? \
	117	(x).a_text: /* shared lib */\
27612c29	118	(N_HEADER_IN_TEXT(x) ? \
c6fec0bf JG	119	(x).a_text - EXEC_BYTES_SIZE: /* no padding */\
	120	(x).a_text /* a page of padding */\
	121	) \
	122	)
	123
	124	/* The address of the data segment in virtual memory.
	125	It is the text segment address, plus text segment size, rounded
	126	up to a N_SEGSIZE boundary for pure or pageable files. */
a3bb31a0 SC	127
a3bb31a0 SC	128	#define N_DATADDR(x) \
c6fec0bf JG	129	(N_MAGIC(x)==OMAGIC? (N_TXTADDR(x)+N_TXTSIZE(x)) \
c6fec0bf JG	130	: (N_SEGSIZE(x) + ((N_TXTADDR(x)+N_TXTSIZE(x)-1) & ~(N_SEGSIZE(x)-1))))
a3bb31a0	131
c6fec0bf	132	/* The address of the BSS segment -- immediately after the data segment. */
a3bb31a0	133
c6fec0bf	134	#define N_BSSADDR(x) (N_DATADDR(x) + (x).a_data)
a3bb31a0	135
c6fec0bf JG	136	/* Offsets of the various portions of the file after the text segment. */
	137
	138	#define N_DATOFF(x) ( N_TXTOFF(x) + N_TXTSIZE(x) )
a3bb31a0 SC	139	#define N_TRELOFF(x) ( N_DATOFF(x) + (x).a_data )
	140	#define N_DRELOFF(x) ( N_TRELOFF(x) + (x).a_trsize )
	141	#define N_SYMOFF(x) ( N_DRELOFF(x) + (x).a_drsize )
	142	#define N_STROFF(x) ( N_SYMOFF(x) + (x).a_syms )
c6fec0bf	143	\f
a3bb31a0 SC	144	/* Symbols */
a3bb31a0 SC	145	struct external_nlist {
2d8ffde4 JG	146	bfd_byte e_strx[BYTES_IN_WORD]; /* index into string table of name */
	147	bfd_byte e_type[1]; /* type of symbol */
	148	bfd_byte e_other[1]; /* misc info (usually empty) */
	149	bfd_byte e_desc[2]; /* description field */
	150	bfd_byte e_value[BYTES_IN_WORD]; /* value of symbol */
a3bb31a0 SC	151	};
a3bb31a0 SC	152
2d8ffde4 JG	153	#define EXTERNAL_NLIST_SIZE (BYTES_IN_WORD+4+BYTES_IN_WORD)
2d8ffde4 JG	154
a3bb31a0	155	struct internal_nlist {
2d8ffde4 JG	156	unsigned long n_strx; /* index into string table of name */
	157	unsigned char n_type; /* type of symbol */
	158	unsigned char n_other; /* misc info (usually empty) */
	159	unsigned short n_desc; /* description field */
	160	bfd_vma n_value; /* value of symbol */
a3bb31a0 SC	161	};
a3bb31a0 SC	162
2d8ffde4	163	/* The n_type field is the symbol type, containing: */
a3bb31a0	164
2d8ffde4 JG	165	#define N_UNDF 0 /* Undefined symbol */
	166	#define N_ABS 2 /* Absolute symbol -- defined at particular addr */
	167	#define N_TEXT 4 /* Text sym -- defined at offset in text seg */
	168	#define N_DATA 6 /* Data sym -- defined at offset in data seg */
	169	#define N_BSS 8 /* BSS sym -- defined at offset in zero'd seg */
e557edcf	170	#define N_COMM 0x12 /* Common symbol (visible after shared lib dynlink) */
30c52cdf	171	#define N_FN 0x1f /* File name of .o file */
1c067821	172	#define N_FN_SEQ 0x0C /* N_FN from Sequent compilers (sigh) */
2d8ffde4	173	/* Note: N_EXT can only be usefully OR-ed with N_UNDF, N_ABS, N_TEXT,
30c52cdf JG	174	N_DATA, or N_BSS. When the low-order bit of other types is set,
30c52cdf JG	175	(e.g. N_WARNING versus N_FN), they are two different types. */
2d8ffde4	176	#define N_EXT 1 /* External symbol (as opposed to local-to-this-file) */
a3bb31a0	177	#define N_TYPE 0x1e
2d8ffde4	178	#define N_STAB 0xe0 /* If any of these bits are on, it's a debug symbol */
a3bb31a0	179
9bbfd057 SC	180	#define N_INDR 0x0a
9bbfd057 SC	181
a3bb31a0 SC	182	/* The following symbols refer to set elements.
	183	All the N_SET[ATDB] symbols with the same name form one set.
	184	Space is allocated for the set in the text section, and each set
	185	elements value is stored into one word of the space.
	186	The first word of the space is the length of the set (number of elements).
	187
	188	The address of the set is made into an N_SETV symbol
	189	whose name is the same as the name of the set.
	190	This symbol acts like a N_DATA global symbol
	191	in that it can satisfy undefined external references. */
	192
	193	/* These appear as input to LD, in a .o file. */
	194	#define N_SETA 0x14 /* Absolute set element symbol */
	195	#define N_SETT 0x16 /* Text set element symbol */
	196	#define N_SETD 0x18 /* Data set element symbol */
	197	#define N_SETB 0x1A /* Bss set element symbol */
	198
	199	/* This is output from LD. */
	200	#define N_SETV 0x1C /* Pointer to set vector in data area. */
	201
e557edcf JG	202	/* Warning symbol. The text gives a warning message, the next symbol
	203	in the table will be undefined. When the symbol is referenced, the
	204	message is printed. */
	205
	206	#define N_WARNING 0x1e
a3bb31a0 SC	207
	208	/* Relocations
	209
	210	There are two types of relocation flavours for a.out systems,
2d8ffde4 JG	211	standard and extended. The standard form is used on systems where the
	212	instruction has room for all the bits of an offset to the operand, whilst
	213	the extended form is used when an address operand has to be split over n
a3bb31a0 SC	214	instructions. Eg, on the 68k, each move instruction can reference
	215	the target with a displacement of 16 or 32 bits. On the sparc, move
	216	instructions use an offset of 14 bits, so the offset is stored in
	217	the reloc field, and the data in the section is ignored.
	218	*/
	219
	220	/* This structure describes a single relocation to be performed.
	221	The text-relocation section of the file is a vector of these structures,
	222	all of which apply to the text section.
	223	Likewise, the data-relocation section applies to the data section. */
	224
	225	struct reloc_std_external {
	226	bfd_byte r_address[BYTES_IN_WORD]; /* offset of of data to relocate */
	227	bfd_byte r_index[3]; /* symbol table index of symbol */
	228	bfd_byte r_type[1]; /* relocation type */
	229	};
	230
	231	#define RELOC_STD_BITS_PCREL_BIG 0x80
	232	#define RELOC_STD_BITS_PCREL_LITTLE 0x01
	233
	234	#define RELOC_STD_BITS_LENGTH_BIG 0x60
	235	#define RELOC_STD_BITS_LENGTH_SH_BIG 5 /* To shift to units place */
	236	#define RELOC_STD_BITS_LENGTH_LITTLE 0x06
	237	#define RELOC_STD_BITS_LENGTH_SH_LITTLE 1
	238
	239	#define RELOC_STD_BITS_EXTERN_BIG 0x10
	240	#define RELOC_STD_BITS_EXTERN_LITTLE 0x08
	241
	242	#define RELOC_STD_BITS_BASEREL_BIG 0x08
	243	#define RELOC_STD_BITS_BASEREL_LITTLE 0x08
	244
	245	#define RELOC_STD_BITS_JMPTABLE_BIG 0x04
	246	#define RELOC_STD_BITS_JMPTABLE_LITTLE 0x04
	247
	248	#define RELOC_STD_BITS_RELATIVE_BIG 0x02
	249	#define RELOC_STD_BITS_RELATIVE_LITTLE 0x02
	250
	251	#define RELOC_STD_SIZE (BYTES_IN_WORD + 3 + 1) /* Bytes per relocation entry */
	252
	253	struct reloc_std_internal
	254	{
	255	bfd_vma r_address; /* Address (within segment) to be relocated. */
	256	/* The meaning of r_symbolnum depends on r_extern. */
	257	unsigned int r_symbolnum:24;
	258	/* Nonzero means value is a pc-relative offset
	259	and it should be relocated for changes in its own address
	260	as well as for changes in the symbol or section specified. */
	261	unsigned int r_pcrel:1;
	262	/* Length (as exponent of 2) of the field to be relocated.
	263	Thus, a value of 2 indicates 1<<2 bytes. */
	264	unsigned int r_length:2;
	265	/* 1 => relocate with value of symbol.
	266	r_symbolnum is the index of the symbol
	267	in files the symbol table.
	268	0 => relocate with the address of a segment.
	269	r_symbolnum is N_TEXT, N_DATA, N_BSS or N_ABS
	270	(the N_EXT bit may be set also, but signifies nothing). */
	271	unsigned int r_extern:1;
	272	/* The next three bits are for SunOS shared libraries, and seem to
	273	be undocumented. */
	274	unsigned int r_baserel:1; /* Linkage table relative */
	275	unsigned int r_jmptable:1; /* pc-relative to jump table */
	276	unsigned int r_relative:1; /* "relative relocation" */
	277	/* unused */
278	unsigned int r_pad:1; /* Padding -- set to zero */
279	};
280
281
282	/* EXTENDED RELOCS */
283
284	struct reloc_ext_external {
285	bfd_byte r_address[BYTES_IN_WORD]; /* offset of of data to relocate */
286	bfd_byte r_index[3]; /* symbol table index of symbol */
287	bfd_byte r_type[1]; /* relocation type */
288	bfd_byte r_addend[BYTES_IN_WORD]; /* datum addend */
289	};
290
291	#define RELOC_EXT_BITS_EXTERN_BIG 0x80
292	#define RELOC_EXT_BITS_EXTERN_LITTLE 0x01
293
294	#define RELOC_EXT_BITS_TYPE_BIG 0x1F
295	#define RELOC_EXT_BITS_TYPE_SH_BIG 0
296	#define RELOC_EXT_BITS_TYPE_LITTLE 0xF8
297	#define RELOC_EXT_BITS_TYPE_SH_LITTLE 3
298
2d8ffde4 JG	299	/* Bytes per relocation entry */
2d8ffde4 JG	300	#define RELOC_EXT_SIZE (BYTES_IN_WORD + 3 + 1 + BYTES_IN_WORD)
a3bb31a0 SC	301
	302	enum reloc_type
	303	{
	304	/* simple relocations */
	305	RELOC_8, /* data[0:7] = addend + sv */
	306	RELOC_16, /* data[0:15] = addend + sv */
	307	RELOC_32, /* data[0:31] = addend + sv */
	308	/* pc-rel displacement */
	309	RELOC_DISP8, /* data[0:7] = addend - pc + sv */
	310	RELOC_DISP16, /* data[0:15] = addend - pc + sv */
	311	RELOC_DISP32, /* data[0:31] = addend - pc + sv */
	312	/* Special */
	313	RELOC_WDISP30, /* data[0:29] = (addend + sv - pc)>>2 */
	314	RELOC_WDISP22, /* data[0:21] = (addend + sv - pc)>>2 */
	315	RELOC_HI22, /* data[0:21] = (addend + sv)>>10 */
	316	RELOC_22, /* data[0:21] = (addend + sv) */
	317	RELOC_13, /* data[0:12] = (addend + sv) */
	318	RELOC_LO10, /* data[0:9] = (addend + sv) */
	319	RELOC_SFA_BASE,
	320	RELOC_SFA_OFF13,
	321	/* P.I.C. (base-relative) */
	322	RELOC_BASE10, /* Not sure - maybe we can do this the */
	323	RELOC_BASE13, /* right way now */
	324	RELOC_BASE22,
	325	/* for some sort of pc-rel P.I.C. (?) */
	326	RELOC_PC10,
	327	RELOC_PC22,
	328	/* P.I.C. jump table */
	329	RELOC_JMP_TBL,
	330	/* reputedly for shared libraries somehow */
	331	RELOC_SEGOFF16,
	332	RELOC_GLOB_DAT,
	333	RELOC_JMP_SLOT,
	334	RELOC_RELATIVE,
fcc654cb SC	335
	336	RELOC_11,
	337	RELOC_WDISP2_14,
	338	RELOC_WDISP19,
	339	RELOC_HHI22, /* data[0:21] = (addend + sv) >> 42 */
	340	RELOC_HLO10, /* data[0:9] = (addend + sv) >> 32 */
	341
a3bb31a0 SC	342	/* 29K relocation types */
	343	RELOC_JUMPTARG,
	344	RELOC_CONST,
	345	RELOC_CONSTH,
	346
bdedf53f	347	/* All the new ones I can think of //v9*/
a3bb31a0	348
bdedf53f SC	349	RELOC_64, /* data[0:63] = addend + sv //v9*/
	350	RELOC_DISP64, /* data[0:63] = addend - pc + sv //v9*/
	351	RELOC_WDISP21, /* data[0:20] = (addend + sv - pc)>>2 //v9*/
	352	RELOC_DISP21, /* data[0:20] = addend - pc + sv //v9*/
	353	RELOC_DISP14, /* data[0:13] = addend - pc + sv //v9*/
a3bb31a0 SC	354	/* Q .
	355	What are the other ones,
	356	Since this is a clean slate, can we throw away the ones we dont
	357	understand ? Should we sort the values ? What about using a
	358	microcode format like the 68k ?
	359	*/
	360	NO_RELOC
	361	};
	362
	363
	364	struct reloc_internal {
	365	bfd_vma r_address; /* offset of of data to relocate */
	366	long r_index; /* symbol table index of symbol */
	367	enum reloc_type r_type; /* relocation type */
	368	bfd_vma r_addend; /* datum addend */
	369	};
	370
	371	/* Q.
	372	Should the length of the string table be 4 bytes or 8 bytes ?
	373
	374	Q.
	375	What about archive indexes ?
	376
	377	*/
	378
2d8ffde4	379	#endif /* __A_OUT_64_H__ */