[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)

/* By default, segment size is constant.  But on some machines, it can
   be a function of the a.out header (e.g. machine type).  */
#ifndef	N_SEGSIZE
#define	N_SEGSIZE(x)	SEGMENT_SIZE
#endif

#define _N_HDROFF(x)	(N_SEGSIZE(x) - EXEC_BYTES_SIZE)
/* address in an a.out of the text section. When demand paged, it's
 set up a bit to make nothing at 0, when an object file it's 0.
 There's a special hack case when the entry point is < TEXT_START_ADDR
 for executables, then the real start is 0 
*/

#define N_TXTADDR(x) \
    (N_MAGIC(x)==OMAGIC? 0 \
     : (N_MAGIC(x) == ZMAGIC && (x).a_entry < TEXT_START_ADDR)? 0 \
     : TEXT_START_ADDR)

/* offset in an a.out of the start of the text section. When demand
   paged, this is the start of the file
*/

#define N_TXTOFF(x)	( (N_MAGIC((x)) == ZMAGIC) ? 0 : EXEC_BYTES_SIZE)
#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		/* Code indicating 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)


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

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


#define N_DATOFF(x)	( N_TXTOFF(x) + (x).a_text )
#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 )


/* 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
d7f8f106 JG	22	/* By default, segment size is constant. But on some machines, it can
	23	be a function of the a.out header (e.g. machine type). */
	24	#ifndef N_SEGSIZE
	25	#define N_SEGSIZE(x) SEGMENT_SIZE
	26	#endif
	27
	28	#define _N_HDROFF(x) (N_SEGSIZE(x) - EXEC_BYTES_SIZE)
a3bb31a0 SC	29	/* address in an a.out of the text section. When demand paged, it's
	30	set up a bit to make nothing at 0, when an object file it's 0.
	31	There's a special hack case when the entry point is < TEXT_START_ADDR
	32	for executables, then the real start is 0
	33	*/
	34
	35	#define N_TXTADDR(x) \
	36	(N_MAGIC(x)==OMAGIC? 0 \
	37	: (N_MAGIC(x) == ZMAGIC && (x).a_entry < TEXT_START_ADDR)? 0 \
	38	: TEXT_START_ADDR)
	39
	40	/* offset in an a.out of the start of the text section. When demand
	41	paged, this is the start of the file
	42	*/
	43
	44	#define N_TXTOFF(x) ( (N_MAGIC((x)) == ZMAGIC) ? 0 : EXEC_BYTES_SIZE)
	45	#if ARCH_SIZE==64
a3bb31a0 SC	46	#define OMAGIC 0x1001 /* Code indicating object file */
	47	#define ZMAGIC 0x1002 /* Code indicating demand-paged executable. */
	48	#define NMAGIC 0x1003 /* Code indicating pure executable. */
	49	#else
a3bb31a0 SC	50	#define OMAGIC 0407 /* Code indicating object file or impure executable. */
	51	#define NMAGIC 0410 /* Code indicating pure executable. */
	52	#define ZMAGIC 0413 /* Code indicating demand-paged executable. */
	53	#endif
	54
	55	#define N_BADMAG(x) (N_MAGIC(x) != OMAGIC \
	56	&& N_MAGIC(x) != NMAGIC \
	57	&& N_MAGIC(x) != ZMAGIC)
	58
	59
	60
	61	#define N_DATADDR(x) \
	62	(N_MAGIC(x)==OMAGIC? (N_TXTADDR(x)+(x).a_text) \
d7f8f106	63	: (N_SEGSIZE(x) + ((N_TXTADDR(x)+(x).a_text-1) & ~(N_SEGSIZE(x)-1))))
a3bb31a0 SC	64
	65	#define N_BSSADDR(x) (N_DATADDR(x) + (x).a_data)
	66
	67
	68	#define N_DATOFF(x) ( N_TXTOFF(x) + (x).a_text )
	69	#define N_TRELOFF(x) ( N_DATOFF(x) + (x).a_data )
	70	#define N_DRELOFF(x) ( N_TRELOFF(x) + (x).a_trsize )
	71	#define N_SYMOFF(x) ( N_DRELOFF(x) + (x).a_drsize )
	72	#define N_STROFF(x) ( N_SYMOFF(x) + (x).a_syms )
	73
	74
	75	/* Symbols */
	76	struct external_nlist {
2d8ffde4 JG	77	bfd_byte e_strx[BYTES_IN_WORD]; /* index into string table of name */
	78	bfd_byte e_type[1]; /* type of symbol */
	79	bfd_byte e_other[1]; /* misc info (usually empty) */
	80	bfd_byte e_desc[2]; /* description field */
	81	bfd_byte e_value[BYTES_IN_WORD]; /* value of symbol */
a3bb31a0 SC	82	};
a3bb31a0 SC	83
2d8ffde4 JG	84	#define EXTERNAL_NLIST_SIZE (BYTES_IN_WORD+4+BYTES_IN_WORD)
2d8ffde4 JG	85
a3bb31a0	86	struct internal_nlist {
2d8ffde4 JG	87	unsigned long n_strx; /* index into string table of name */
	88	unsigned char n_type; /* type of symbol */
	89	unsigned char n_other; /* misc info (usually empty) */
	90	unsigned short n_desc; /* description field */
	91	bfd_vma n_value; /* value of symbol */
a3bb31a0 SC	92	};
a3bb31a0 SC	93
2d8ffde4	94	/* The n_type field is the symbol type, containing: */
a3bb31a0	95
2d8ffde4 JG	96	#define N_UNDF 0 /* Undefined symbol */
	97	#define N_ABS 2 /* Absolute symbol -- defined at particular addr */
	98	#define N_TEXT 4 /* Text sym -- defined at offset in text seg */
	99	#define N_DATA 6 /* Data sym -- defined at offset in data seg */
	100	#define N_BSS 8 /* BSS sym -- defined at offset in zero'd seg */
e557edcf	101	#define N_COMM 0x12 /* Common symbol (visible after shared lib dynlink) */
30c52cdf	102	#define N_FN 0x1f /* File name of .o file */
1c067821	103	#define N_FN_SEQ 0x0C /* N_FN from Sequent compilers (sigh) */
2d8ffde4	104	/* Note: N_EXT can only be usefully OR-ed with N_UNDF, N_ABS, N_TEXT,
30c52cdf JG	105	N_DATA, or N_BSS. When the low-order bit of other types is set,
30c52cdf JG	106	(e.g. N_WARNING versus N_FN), they are two different types. */
2d8ffde4	107	#define N_EXT 1 /* External symbol (as opposed to local-to-this-file) */
a3bb31a0	108	#define N_TYPE 0x1e
2d8ffde4	109	#define N_STAB 0xe0 /* If any of these bits are on, it's a debug symbol */
a3bb31a0	110
9bbfd057 SC	111	#define N_INDR 0x0a
9bbfd057 SC	112
a3bb31a0 SC	113	/* The following symbols refer to set elements.
	114	All the N_SET[ATDB] symbols with the same name form one set.
	115	Space is allocated for the set in the text section, and each set
	116	elements value is stored into one word of the space.
	117	The first word of the space is the length of the set (number of elements).
	118
	119	The address of the set is made into an N_SETV symbol
	120	whose name is the same as the name of the set.
	121	This symbol acts like a N_DATA global symbol
	122	in that it can satisfy undefined external references. */
	123
	124	/* These appear as input to LD, in a .o file. */
	125	#define N_SETA 0x14 /* Absolute set element symbol */
	126	#define N_SETT 0x16 /* Text set element symbol */
	127	#define N_SETD 0x18 /* Data set element symbol */
	128	#define N_SETB 0x1A /* Bss set element symbol */
	129
	130	/* This is output from LD. */
	131	#define N_SETV 0x1C /* Pointer to set vector in data area. */
	132
e557edcf JG	133	/* Warning symbol. The text gives a warning message, the next symbol
	134	in the table will be undefined. When the symbol is referenced, the
	135	message is printed. */
	136
	137	#define N_WARNING 0x1e
a3bb31a0 SC	138
	139	/* Relocations
	140
	141	There are two types of relocation flavours for a.out systems,
2d8ffde4 JG	142	standard and extended. The standard form is used on systems where the
	143	instruction has room for all the bits of an offset to the operand, whilst
	144	the extended form is used when an address operand has to be split over n
a3bb31a0 SC	145	instructions. Eg, on the 68k, each move instruction can reference
	146	the target with a displacement of 16 or 32 bits. On the sparc, move
	147	instructions use an offset of 14 bits, so the offset is stored in
	148	the reloc field, and the data in the section is ignored.
	149	*/
	150
	151	/* This structure describes a single relocation to be performed.
	152	The text-relocation section of the file is a vector of these structures,
	153	all of which apply to the text section.
	154	Likewise, the data-relocation section applies to the data section. */
	155
	156	struct reloc_std_external {
	157	bfd_byte r_address[BYTES_IN_WORD]; /* offset of of data to relocate */
	158	bfd_byte r_index[3]; /* symbol table index of symbol */
	159	bfd_byte r_type[1]; /* relocation type */
	160	};
	161
	162	#define RELOC_STD_BITS_PCREL_BIG 0x80
	163	#define RELOC_STD_BITS_PCREL_LITTLE 0x01
	164
	165	#define RELOC_STD_BITS_LENGTH_BIG 0x60
	166	#define RELOC_STD_BITS_LENGTH_SH_BIG 5 /* To shift to units place */
	167	#define RELOC_STD_BITS_LENGTH_LITTLE 0x06
	168	#define RELOC_STD_BITS_LENGTH_SH_LITTLE 1
	169
	170	#define RELOC_STD_BITS_EXTERN_BIG 0x10
	171	#define RELOC_STD_BITS_EXTERN_LITTLE 0x08
	172
	173	#define RELOC_STD_BITS_BASEREL_BIG 0x08
	174	#define RELOC_STD_BITS_BASEREL_LITTLE 0x08
	175
	176	#define RELOC_STD_BITS_JMPTABLE_BIG 0x04
	177	#define RELOC_STD_BITS_JMPTABLE_LITTLE 0x04
	178
	179	#define RELOC_STD_BITS_RELATIVE_BIG 0x02
	180	#define RELOC_STD_BITS_RELATIVE_LITTLE 0x02
	181
	182	#define RELOC_STD_SIZE (BYTES_IN_WORD + 3 + 1) /* Bytes per relocation entry */
	183
	184	struct reloc_std_internal
	185	{
	186	bfd_vma r_address; /* Address (within segment) to be relocated. */
	187	/* The meaning of r_symbolnum depends on r_extern. */
	188	unsigned int r_symbolnum:24;
	189	/* Nonzero means value is a pc-relative offset
	190	and it should be relocated for changes in its own address
	191	as well as for changes in the symbol or section specified. */
	192	unsigned int r_pcrel:1;
	193	/* Length (as exponent of 2) of the field to be relocated.
	194	Thus, a value of 2 indicates 1<<2 bytes. */
	195	unsigned int r_length:2;
	196	/* 1 => relocate with value of symbol.
	197	r_symbolnum is the index of the symbol
	198	in files the symbol table.
	199	0 => relocate with the address of a segment.
	200	r_symbolnum is N_TEXT, N_DATA, N_BSS or N_ABS
	201	(the N_EXT bit may be set also, but signifies nothing). */
	202	unsigned int r_extern:1;
	203	/* The next three bits are for SunOS shared libraries, and seem to
	204	be undocumented. */
	205	unsigned int r_baserel:1; /* Linkage table relative */
	206	unsigned int r_jmptable:1; /* pc-relative to jump table */
	207	unsigned int r_relative:1; /* "relative relocation" */
	208	/* unused */
209	unsigned int r_pad:1; /* Padding -- set to zero */
210	};
211
212
213	/* EXTENDED RELOCS */
214
215	struct reloc_ext_external {
216	bfd_byte r_address[BYTES_IN_WORD]; /* offset of of data to relocate */
217	bfd_byte r_index[3]; /* symbol table index of symbol */
218	bfd_byte r_type[1]; /* relocation type */
219	bfd_byte r_addend[BYTES_IN_WORD]; /* datum addend */
220	};
221
222	#define RELOC_EXT_BITS_EXTERN_BIG 0x80
223	#define RELOC_EXT_BITS_EXTERN_LITTLE 0x01
224
225	#define RELOC_EXT_BITS_TYPE_BIG 0x1F
226	#define RELOC_EXT_BITS_TYPE_SH_BIG 0
227	#define RELOC_EXT_BITS_TYPE_LITTLE 0xF8
228	#define RELOC_EXT_BITS_TYPE_SH_LITTLE 3
229
2d8ffde4 JG	230	/* Bytes per relocation entry */
2d8ffde4 JG	231	#define RELOC_EXT_SIZE (BYTES_IN_WORD + 3 + 1 + BYTES_IN_WORD)
a3bb31a0 SC	232
	233	enum reloc_type
	234	{
	235	/* simple relocations */
	236	RELOC_8, /* data[0:7] = addend + sv */
	237	RELOC_16, /* data[0:15] = addend + sv */
	238	RELOC_32, /* data[0:31] = addend + sv */
	239	/* pc-rel displacement */
	240	RELOC_DISP8, /* data[0:7] = addend - pc + sv */
	241	RELOC_DISP16, /* data[0:15] = addend - pc + sv */
	242	RELOC_DISP32, /* data[0:31] = addend - pc + sv */
	243	/* Special */
	244	RELOC_WDISP30, /* data[0:29] = (addend + sv - pc)>>2 */
	245	RELOC_WDISP22, /* data[0:21] = (addend + sv - pc)>>2 */
	246	RELOC_HI22, /* data[0:21] = (addend + sv)>>10 */
	247	RELOC_22, /* data[0:21] = (addend + sv) */
	248	RELOC_13, /* data[0:12] = (addend + sv) */
	249	RELOC_LO10, /* data[0:9] = (addend + sv) */
	250	RELOC_SFA_BASE,
	251	RELOC_SFA_OFF13,
	252	/* P.I.C. (base-relative) */
	253	RELOC_BASE10, /* Not sure - maybe we can do this the */
	254	RELOC_BASE13, /* right way now */
	255	RELOC_BASE22,
	256	/* for some sort of pc-rel P.I.C. (?) */
	257	RELOC_PC10,
	258	RELOC_PC22,
	259	/* P.I.C. jump table */
	260	RELOC_JMP_TBL,
	261	/* reputedly for shared libraries somehow */
	262	RELOC_SEGOFF16,
	263	RELOC_GLOB_DAT,
	264	RELOC_JMP_SLOT,
	265	RELOC_RELATIVE,
fcc654cb SC	266
	267	RELOC_11,
	268	RELOC_WDISP2_14,
	269	RELOC_WDISP19,
	270	RELOC_HHI22, /* data[0:21] = (addend + sv) >> 42 */
	271	RELOC_HLO10, /* data[0:9] = (addend + sv) >> 32 */
	272
a3bb31a0 SC	273	/* 29K relocation types */
	274	RELOC_JUMPTARG,
	275	RELOC_CONST,
	276	RELOC_CONSTH,
	277
bdedf53f	278	/* All the new ones I can think of //v9*/
a3bb31a0	279
bdedf53f SC	280	RELOC_64, /* data[0:63] = addend + sv //v9*/
	281	RELOC_DISP64, /* data[0:63] = addend - pc + sv //v9*/
	282	RELOC_WDISP21, /* data[0:20] = (addend + sv - pc)>>2 //v9*/
	283	RELOC_DISP21, /* data[0:20] = addend - pc + sv //v9*/
	284	RELOC_DISP14, /* data[0:13] = addend - pc + sv //v9*/
a3bb31a0 SC	285	/* Q .
	286	What are the other ones,
	287	Since this is a clean slate, can we throw away the ones we dont
	288	understand ? Should we sort the values ? What about using a
	289	microcode format like the 68k ?
	290	*/
	291	NO_RELOC
	292	};
	293
	294
	295	struct reloc_internal {
	296	bfd_vma r_address; /* offset of of data to relocate */
	297	long r_index; /* symbol table index of symbol */
	298	enum reloc_type r_type; /* relocation type */
	299	bfd_vma r_addend; /* datum addend */
	300	};
	301
	302	/* Q.
	303	Should the length of the string table be 4 bytes or 8 bytes ?
	304
	305	Q.
	306	What about archive indexes ?
	307
	308	*/
	309
2d8ffde4	310	#endif /* __A_OUT_64_H__ */