[deliverable/binutils-gdb.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 PAGE_SIZE 0x2000
#define OMAGIC 0x1001		/* Code indicating object file  */
#define ZMAGIC 0x1002		/* Code indicating demand-paged executable.  */
#define NMAGIC 0x1003		/* Code indicating pure executable.  */
#else
#ifndef PAGE_SIZE
#define PAGE_SIZE 0x2000
#endif
#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 */
/* 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
	46	#define PAGE_SIZE 0x2000
	47	#define OMAGIC 0x1001 /* Code indicating object file */
	48	#define ZMAGIC 0x1002 /* Code indicating demand-paged executable. */
	49	#define NMAGIC 0x1003 /* Code indicating pure executable. */
	50	#else
	51	#ifndef PAGE_SIZE
	52	#define PAGE_SIZE 0x2000
	53	#endif
	54	#define OMAGIC 0407 /* Code indicating object file or impure executable. */
	55	#define NMAGIC 0410 /* Code indicating pure executable. */
	56	#define ZMAGIC 0413 /* Code indicating demand-paged executable. */
	57	#endif
	58
	59	#define N_BADMAG(x) (N_MAGIC(x) != OMAGIC \
	60	&& N_MAGIC(x) != NMAGIC \
	61	&& N_MAGIC(x) != ZMAGIC)
	62
	63
	64
	65	#define N_DATADDR(x) \
	66	(N_MAGIC(x)==OMAGIC? (N_TXTADDR(x)+(x).a_text) \
d7f8f106	67	: (N_SEGSIZE(x) + ((N_TXTADDR(x)+(x).a_text-1) & ~(N_SEGSIZE(x)-1))))
a3bb31a0 SC	68
	69	#define N_BSSADDR(x) (N_DATADDR(x) + (x).a_data)
	70
	71
	72	#define N_DATOFF(x) ( N_TXTOFF(x) + (x).a_text )
	73	#define N_TRELOFF(x) ( N_DATOFF(x) + (x).a_data )
	74	#define N_DRELOFF(x) ( N_TRELOFF(x) + (x).a_trsize )
	75	#define N_SYMOFF(x) ( N_DRELOFF(x) + (x).a_drsize )
	76	#define N_STROFF(x) ( N_SYMOFF(x) + (x).a_syms )
	77
	78
	79	/* Symbols */
	80	struct external_nlist {
2d8ffde4 JG	81	bfd_byte e_strx[BYTES_IN_WORD]; /* index into string table of name */
	82	bfd_byte e_type[1]; /* type of symbol */
	83	bfd_byte e_other[1]; /* misc info (usually empty) */
	84	bfd_byte e_desc[2]; /* description field */
	85	bfd_byte e_value[BYTES_IN_WORD]; /* value of symbol */
a3bb31a0 SC	86	};
a3bb31a0 SC	87
2d8ffde4 JG	88	#define EXTERNAL_NLIST_SIZE (BYTES_IN_WORD+4+BYTES_IN_WORD)
2d8ffde4 JG	89
a3bb31a0	90	struct internal_nlist {
2d8ffde4 JG	91	unsigned long n_strx; /* index into string table of name */
	92	unsigned char n_type; /* type of symbol */
	93	unsigned char n_other; /* misc info (usually empty) */
	94	unsigned short n_desc; /* description field */
	95	bfd_vma n_value; /* value of symbol */
a3bb31a0 SC	96	};
a3bb31a0 SC	97
2d8ffde4	98	/* The n_type field is the symbol type, containing: */
a3bb31a0	99
2d8ffde4 JG	100	#define N_UNDF 0 /* Undefined symbol */
	101	#define N_ABS 2 /* Absolute symbol -- defined at particular addr */
	102	#define N_TEXT 4 /* Text sym -- defined at offset in text seg */
	103	#define N_DATA 6 /* Data sym -- defined at offset in data seg */
	104	#define N_BSS 8 /* BSS sym -- defined at offset in zero'd seg */
e557edcf	105	#define N_COMM 0x12 /* Common symbol (visible after shared lib dynlink) */
30c52cdf	106	#define N_FN 0x1f /* File name of .o file */
2d8ffde4	107	/* Note: N_EXT can only be usefully OR-ed with N_UNDF, N_ABS, N_TEXT,
30c52cdf JG	108	N_DATA, or N_BSS. When the low-order bit of other types is set,
30c52cdf JG	109	(e.g. N_WARNING versus N_FN), they are two different types. */
2d8ffde4	110	#define N_EXT 1 /* External symbol (as opposed to local-to-this-file) */
a3bb31a0	111	#define N_TYPE 0x1e
2d8ffde4	112	#define N_STAB 0xe0 /* If any of these bits are on, it's a debug symbol */
a3bb31a0	113
9bbfd057 SC	114	#define N_INDR 0x0a
9bbfd057 SC	115
a3bb31a0 SC	116	/* The following symbols refer to set elements.
	117	All the N_SET[ATDB] symbols with the same name form one set.
	118	Space is allocated for the set in the text section, and each set
	119	elements value is stored into one word of the space.
	120	The first word of the space is the length of the set (number of elements).
	121
	122	The address of the set is made into an N_SETV symbol
	123	whose name is the same as the name of the set.
	124	This symbol acts like a N_DATA global symbol
	125	in that it can satisfy undefined external references. */
	126
	127	/* These appear as input to LD, in a .o file. */
	128	#define N_SETA 0x14 /* Absolute set element symbol */
	129	#define N_SETT 0x16 /* Text set element symbol */
	130	#define N_SETD 0x18 /* Data set element symbol */
	131	#define N_SETB 0x1A /* Bss set element symbol */
	132
	133	/* This is output from LD. */
	134	#define N_SETV 0x1C /* Pointer to set vector in data area. */
	135
e557edcf JG	136	/* Warning symbol. The text gives a warning message, the next symbol
	137	in the table will be undefined. When the symbol is referenced, the
	138	message is printed. */
	139
	140	#define N_WARNING 0x1e
a3bb31a0 SC	141
	142	/* Relocations
	143
	144	There are two types of relocation flavours for a.out systems,
2d8ffde4 JG	145	standard and extended. The standard form is used on systems where the
	146	instruction has room for all the bits of an offset to the operand, whilst
	147	the extended form is used when an address operand has to be split over n
a3bb31a0 SC	148	instructions. Eg, on the 68k, each move instruction can reference
	149	the target with a displacement of 16 or 32 bits. On the sparc, move
	150	instructions use an offset of 14 bits, so the offset is stored in
	151	the reloc field, and the data in the section is ignored.
	152	*/
	153
	154	/* This structure describes a single relocation to be performed.
	155	The text-relocation section of the file is a vector of these structures,
	156	all of which apply to the text section.
	157	Likewise, the data-relocation section applies to the data section. */
	158
	159	struct reloc_std_external {
	160	bfd_byte r_address[BYTES_IN_WORD]; /* offset of of data to relocate */
	161	bfd_byte r_index[3]; /* symbol table index of symbol */
	162	bfd_byte r_type[1]; /* relocation type */
	163	};
	164
	165	#define RELOC_STD_BITS_PCREL_BIG 0x80
	166	#define RELOC_STD_BITS_PCREL_LITTLE 0x01
	167
	168	#define RELOC_STD_BITS_LENGTH_BIG 0x60
	169	#define RELOC_STD_BITS_LENGTH_SH_BIG 5 /* To shift to units place */
	170	#define RELOC_STD_BITS_LENGTH_LITTLE 0x06
	171	#define RELOC_STD_BITS_LENGTH_SH_LITTLE 1
	172
	173	#define RELOC_STD_BITS_EXTERN_BIG 0x10
	174	#define RELOC_STD_BITS_EXTERN_LITTLE 0x08
	175
	176	#define RELOC_STD_BITS_BASEREL_BIG 0x08
	177	#define RELOC_STD_BITS_BASEREL_LITTLE 0x08
	178
	179	#define RELOC_STD_BITS_JMPTABLE_BIG 0x04
	180	#define RELOC_STD_BITS_JMPTABLE_LITTLE 0x04
	181
	182	#define RELOC_STD_BITS_RELATIVE_BIG 0x02
	183	#define RELOC_STD_BITS_RELATIVE_LITTLE 0x02
	184
	185	#define RELOC_STD_SIZE (BYTES_IN_WORD + 3 + 1) /* Bytes per relocation entry */
	186
	187	struct reloc_std_internal
	188	{
	189	bfd_vma r_address; /* Address (within segment) to be relocated. */
	190	/* The meaning of r_symbolnum depends on r_extern. */
	191	unsigned int r_symbolnum:24;
	192	/* Nonzero means value is a pc-relative offset
	193	and it should be relocated for changes in its own address
	194	as well as for changes in the symbol or section specified. */
	195	unsigned int r_pcrel:1;
	196	/* Length (as exponent of 2) of the field to be relocated.
	197	Thus, a value of 2 indicates 1<<2 bytes. */
	198	unsigned int r_length:2;
	199	/* 1 => relocate with value of symbol.
	200	r_symbolnum is the index of the symbol
	201	in files the symbol table.
	202	0 => relocate with the address of a segment.
	203	r_symbolnum is N_TEXT, N_DATA, N_BSS or N_ABS
	204	(the N_EXT bit may be set also, but signifies nothing). */
	205	unsigned int r_extern:1;
	206	/* The next three bits are for SunOS shared libraries, and seem to
	207	be undocumented. */
	208	unsigned int r_baserel:1; /* Linkage table relative */
	209	unsigned int r_jmptable:1; /* pc-relative to jump table */
	210	unsigned int r_relative:1; /* "relative relocation" */
	211	/* unused */
212	unsigned int r_pad:1; /* Padding -- set to zero */
213	};
214
215
216	/* EXTENDED RELOCS */
217
218	struct reloc_ext_external {
219	bfd_byte r_address[BYTES_IN_WORD]; /* offset of of data to relocate */
220	bfd_byte r_index[3]; /* symbol table index of symbol */
221	bfd_byte r_type[1]; /* relocation type */
222	bfd_byte r_addend[BYTES_IN_WORD]; /* datum addend */
223	};
224
225	#define RELOC_EXT_BITS_EXTERN_BIG 0x80
226	#define RELOC_EXT_BITS_EXTERN_LITTLE 0x01
227
228	#define RELOC_EXT_BITS_TYPE_BIG 0x1F
229	#define RELOC_EXT_BITS_TYPE_SH_BIG 0
230	#define RELOC_EXT_BITS_TYPE_LITTLE 0xF8
231	#define RELOC_EXT_BITS_TYPE_SH_LITTLE 3
232
2d8ffde4 JG	233	/* Bytes per relocation entry */
2d8ffde4 JG	234	#define RELOC_EXT_SIZE (BYTES_IN_WORD + 3 + 1 + BYTES_IN_WORD)
a3bb31a0 SC	235
	236	enum reloc_type
	237	{
	238	/* simple relocations */
	239	RELOC_8, /* data[0:7] = addend + sv */
	240	RELOC_16, /* data[0:15] = addend + sv */
	241	RELOC_32, /* data[0:31] = addend + sv */
	242	/* pc-rel displacement */
	243	RELOC_DISP8, /* data[0:7] = addend - pc + sv */
	244	RELOC_DISP16, /* data[0:15] = addend - pc + sv */
	245	RELOC_DISP32, /* data[0:31] = addend - pc + sv */
	246	/* Special */
	247	RELOC_WDISP30, /* data[0:29] = (addend + sv - pc)>>2 */
	248	RELOC_WDISP22, /* data[0:21] = (addend + sv - pc)>>2 */
	249	RELOC_HI22, /* data[0:21] = (addend + sv)>>10 */
	250	RELOC_22, /* data[0:21] = (addend + sv) */
	251	RELOC_13, /* data[0:12] = (addend + sv) */
	252	RELOC_LO10, /* data[0:9] = (addend + sv) */
	253	RELOC_SFA_BASE,
	254	RELOC_SFA_OFF13,
	255	/* P.I.C. (base-relative) */
	256	RELOC_BASE10, /* Not sure - maybe we can do this the */
	257	RELOC_BASE13, /* right way now */
	258	RELOC_BASE22,
	259	/* for some sort of pc-rel P.I.C. (?) */
	260	RELOC_PC10,
	261	RELOC_PC22,
	262	/* P.I.C. jump table */
	263	RELOC_JMP_TBL,
	264	/* reputedly for shared libraries somehow */
	265	RELOC_SEGOFF16,
	266	RELOC_GLOB_DAT,
	267	RELOC_JMP_SLOT,
	268	RELOC_RELATIVE,
fcc654cb SC	269
	270	RELOC_11,
	271	RELOC_WDISP2_14,
	272	RELOC_WDISP19,
	273	RELOC_HHI22, /* data[0:21] = (addend + sv) >> 42 */
	274	RELOC_HLO10, /* data[0:9] = (addend + sv) >> 32 */
	275
a3bb31a0 SC	276	/* 29K relocation types */
	277	RELOC_JUMPTARG,
	278	RELOC_CONST,
	279	RELOC_CONSTH,
	280
bdedf53f	281	/* All the new ones I can think of //v9*/
a3bb31a0	282
bdedf53f SC	283	RELOC_64, /* data[0:63] = addend + sv //v9*/
	284	RELOC_DISP64, /* data[0:63] = addend - pc + sv //v9*/
	285	RELOC_WDISP21, /* data[0:20] = (addend + sv - pc)>>2 //v9*/
	286	RELOC_DISP21, /* data[0:20] = addend - pc + sv //v9*/
	287	RELOC_DISP14, /* data[0:13] = addend - pc + sv //v9*/
a3bb31a0 SC	288	/* Q .
	289	What are the other ones,
	290	Since this is a clean slate, can we throw away the ones we dont
	291	understand ? Should we sort the values ? What about using a
	292	microcode format like the 68k ?
	293	*/
	294	NO_RELOC
	295	};
	296
	297
	298	struct reloc_internal {
	299	bfd_vma r_address; /* offset of of data to relocate */
	300	long r_index; /* symbol table index of symbol */
	301	enum reloc_type r_type; /* relocation type */
	302	bfd_vma r_addend; /* datum addend */
	303	};
	304
	305	/* Q.
	306	Should the length of the string table be 4 bytes or 8 bytes ?
	307
	308	Q.
	309	What about archive indexes ?
	310
	311	*/
	312
2d8ffde4	313	#endif /* __A_OUT_64_H__ */