[deliverable/binutils-gdb.git] / include / aout64.h

#ifndef __A_OUT_64_H__
#define __A_OUT_64_H__


/* This is the layout on disk of the 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)

/* This is the layout in memory of a "struct exec" while we process it.  */
struct internal_exec
  {
    long a_info;		/* Magic number and flags packed		*/
    bfd_vma a_text;		/* length of text, in bytes 			*/
    bfd_vma a_data;		/* length of data, in bytes 			*/
    bfd_vma a_bss;		/* length of uninitialized data area for file	*/
    bfd_vma a_syms;		/* length of symbol table data in file		*/
    bfd_vma a_entry;		/* start address 				*/
    bfd_vma a_trsize;		/* length of relocation info for text, in bytes */
    bfd_vma a_drsize;		/* length of relocation info for data, in bytes */
  };


/* Magic number is written 
< MSB                >
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
< FLAGS             > <    MACHINE TYPE     >	<  MAGIC  				     >
*/
enum machine_type {
  M_UNKNOWN = 0,
  M_68010 = 1,
  M_68020 = 2,
  M_SPARC = 3,
  /* skip a bunch so we dont run into any of suns numbers */
  M_386 = 100,
  M_29K = 101,
  M_NEWONE = 200,
  M_NEWTWO = 201,

};

#define N_DYNAMIC(exec) ((exec).a_info & 0x8000000)

#define N_MAGIC(exec) ((exec).a_info & 0xffff)
#define N_MACHTYPE(exec) ((enum machine_type)(((exec).a_info >> 16) & 0xff))
#define N_FLAGS(exec) (((exec).a_info >> 24) & 0xff)
#define N_SET_INFO(exec, magic, type, flags) \
((exec).a_info = ((magic) & 0xffff) \
 | (((int)(type) & 0xff) << 16) \
 | (((flags) & 0xff) << 24))

#define N_SET_MAGIC(exec, magic) \
((exec).a_info = (((exec).a_info & 0xffff0000) | ((magic) & 0xffff)))

#define N_SET_MACHTYPE(exec, machtype) \
((exec).a_info = \
 ((exec).a_info&0xff00ffff) | ((((int)(machtype))&0xff) << 16))

#define N_SET_FLAGS(exec, flags) \
((exec).a_info = \
 ((exec).a_info&0x00ffffff) | (((flags) & 0xff) << 24))

#define _N_HDROFF(x)	(SEGMENT_SIZE - 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) \
     :  (SEGMENT_SIZE + ((N_TXTADDR(x)+(x).a_text-1) & ~(SEGMENT_SIZE-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 symbol 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_LIST_SIZE (BYTES_IN_WORD+4+BYTES_IN_WORD)
struct internal_nlist {
  char *strx;				/* index into string table of symbol name 	*/
  uint8_type n_type;			/* type of symbol				*/
  uint8_type n_other;			/* misc info (usually empty)			*/
  uint16_type n_desc;		       	/* description field				*/
  bfd_vma n_value;			/* value of symbol				*/
};

/* The n_type field is packed : 

  7 6 5 4 3 2 1 0
                ^-	if set the symbol is externaly visible 
		0 	local
		1 	N_EXT external
	  ^ ^ ^---- 	select which section the symbol belongs to
	0 0 0 0 x	 N_UNDF, undefined
	0 0 0 1	x	 N_ABS,  no section, base at 0
	0 0 1 0	x  	 N_TEXT, text section
 	0 0 1 1	x  	 N_DATA, data section	
	0 1 0 0	x  	 N_BSS,  bss section
	^----------     if set the symbol is a set element
	1 0 1 0 x	 N_SETA	absolute set element symbol
	1 0 1 1 x	 N_SETT text set element symbol
	1 1 0 0 x	 N_SETD data set element symbol
	1 1 0 1 x	 N_SETB bss set element symbol
	1 1 1 0 x	 N_SETV pointer to set vector in data area
        1 1 1 1 0 	 N_TYPE mask for all of the above

  1 1 1 0 0 0 0 0	 N_STAB type is a stab
*/

#define N_UNDF	0			
#define N_ABS 	2
#define N_TEXT 	4
#define N_DATA 	6
#define N_BSS 	8
#define N_FN	15
#define N_EXT 	1
#define N_TYPE  0x1e
#define N_STAB 	0xe0

/* 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.  */


/* 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

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

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_GNU_H__ */
Commit	Line	Data
a3bb31a0 SC	1	#ifndef __A_OUT_64_H__
	2	#define __A_OUT_64_H__
	3
	4
	5	/* This is the layout on disk of the 64 bit exec header. */
	6
	7	struct external_exec
	8	{
	9	bfd_byte e_info[4]; /* magic number and stuff */
	10	bfd_byte e_text[BYTES_IN_WORD]; /* length of text section in bytes */
	11	bfd_byte e_data[BYTES_IN_WORD]; /* length of data section in bytes */
	12	bfd_byte e_bss[BYTES_IN_WORD]; /* length of bss area in bytes */
	13	bfd_byte e_syms[BYTES_IN_WORD]; /* length of symbol table in bytes */
	14	bfd_byte e_entry[BYTES_IN_WORD]; /* start address */
	15	bfd_byte e_trsize[BYTES_IN_WORD]; /* length of text relocation info */
	16	bfd_byte e_drsize[BYTES_IN_WORD]; /* length of data relocation info */
	17	};
	18
	19
	20	#define EXEC_BYTES_SIZE (4 + BYTES_IN_WORD * 7)
	21
	22	/* This is the layout in memory of a "struct exec" while we process it. */
	23	struct internal_exec
	24	{
	25	long a_info; /* Magic number and flags packed */
	26	bfd_vma a_text; /* length of text, in bytes */
	27	bfd_vma a_data; /* length of data, in bytes */
	28	bfd_vma a_bss; /* length of uninitialized data area for file */
	29	bfd_vma a_syms; /* length of symbol table data in file */
	30	bfd_vma a_entry; /* start address */
	31	bfd_vma a_trsize; /* length of relocation info for text, in bytes */
	32	bfd_vma a_drsize; /* length of relocation info for data, in bytes */
	33	};
	34
	35
	36	/* Magic number is written
	37	< MSB >
	38	31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
	39	< FLAGS > < MACHINE TYPE > < MAGIC >
	40	*/
	41	enum machine_type {
	42	M_UNKNOWN = 0,
	43	M_68010 = 1,
	44	M_68020 = 2,
	45	M_SPARC = 3,
	46	/* skip a bunch so we dont run into any of suns numbers */
	47	M_386 = 100,
	48	M_29K = 101,
	49	M_NEWONE = 200,
	50	M_NEWTWO = 201,
	51
	52	};
	53
	54	#define N_DYNAMIC(exec) ((exec).a_info & 0x8000000)
	55
	56	#define N_MAGIC(exec) ((exec).a_info & 0xffff)
	57	#define N_MACHTYPE(exec) ((enum machine_type)(((exec).a_info >> 16) & 0xff))
	58	#define N_FLAGS(exec) (((exec).a_info >> 24) & 0xff)
	59	#define N_SET_INFO(exec, magic, type, flags) \
	60	((exec).a_info = ((magic) & 0xffff) \
	61	\| (((int)(type) & 0xff) << 16) \
	62	\| (((flags) & 0xff) << 24))
	63
	64	#define N_SET_MAGIC(exec, magic) \
65	((exec).a_info = (((exec).a_info & 0xffff0000) \| ((magic) & 0xffff)))
66
67	#define N_SET_MACHTYPE(exec, machtype) \
68	((exec).a_info = \
69	((exec).a_info&0xff00ffff) \| ((((int)(machtype))&0xff) << 16))
70
71	#define N_SET_FLAGS(exec, flags) \
72	((exec).a_info = \
73	((exec).a_info&0x00ffffff) \| (((flags) & 0xff) << 24))
74
75	#define _N_HDROFF(x) (SEGMENT_SIZE - EXEC_BYTES_SIZE)
76	/* address in an a.out of the text section. When demand paged, it's
77	set up a bit to make nothing at 0, when an object file it's 0.
78	There's a special hack case when the entry point is < TEXT_START_ADDR
79	for executables, then the real start is 0
80	*/
81
82	#define N_TXTADDR(x) \
83	(N_MAGIC(x)==OMAGIC? 0 \
84	: (N_MAGIC(x) == ZMAGIC && (x).a_entry < TEXT_START_ADDR)? 0 \
85	: TEXT_START_ADDR)
86
87	/* offset in an a.out of the start of the text section. When demand
88	paged, this is the start of the file
89	*/
90
91	#define N_TXTOFF(x) ( (N_MAGIC((x)) == ZMAGIC) ? 0 : EXEC_BYTES_SIZE)
92	#if ARCH_SIZE==64
93	#define PAGE_SIZE 0x2000
94	#define OMAGIC 0x1001 /* Code indicating object file */
95	#define ZMAGIC 0x1002 /* Code indicating demand-paged executable. */
96	#define NMAGIC 0x1003 /* Code indicating pure executable. */
97	#else
98	#ifndef PAGE_SIZE
99	#define PAGE_SIZE 0x2000
100	#endif
101	#define OMAGIC 0407 /* Code indicating object file or impure executable. */
102	#define NMAGIC 0410 /* Code indicating pure executable. */
103	#define ZMAGIC 0413 /* Code indicating demand-paged executable. */
104	#endif
105
106	#define N_BADMAG(x) (N_MAGIC(x) != OMAGIC \
107	&& N_MAGIC(x) != NMAGIC \
108	&& N_MAGIC(x) != ZMAGIC)
109
110
111
112	#define N_DATADDR(x) \
113	(N_MAGIC(x)==OMAGIC? (N_TXTADDR(x)+(x).a_text) \
114	: (SEGMENT_SIZE + ((N_TXTADDR(x)+(x).a_text-1) & ~(SEGMENT_SIZE-1))))
115
116	#define N_BSSADDR(x) (N_DATADDR(x) + (x).a_data)
117
118
119	#define N_DATOFF(x) ( N_TXTOFF(x) + (x).a_text )
120	#define N_TRELOFF(x) ( N_DATOFF(x) + (x).a_data )
121	#define N_DRELOFF(x) ( N_TRELOFF(x) + (x).a_trsize )
122	#define N_SYMOFF(x) ( N_DRELOFF(x) + (x).a_drsize )
123	#define N_STROFF(x) ( N_SYMOFF(x) + (x).a_syms )
124
125
126	/* Symbols */
127	struct external_nlist {
128	bfd_byte e_strx[BYTES_IN_WORD]; /* index into string table of symbol name */
129	bfd_byte e_type[1]; /* type of symbol */
130	bfd_byte e_other[1]; /* misc info (usually empty) */
131	bfd_byte e_desc[2]; /* description field */
132	bfd_byte e_value[BYTES_IN_WORD];/* value of symbol */
133	};
134
135	#define EXTERNAL_LIST_SIZE (BYTES_IN_WORD+4+BYTES_IN_WORD)
136	struct internal_nlist {
137	char strx; / index into string table of symbol name */
138	uint8_type n_type; /* type of symbol */
139	uint8_type n_other; /* misc info (usually empty) */
140	uint16_type n_desc; /* description field */
141	bfd_vma n_value; /* value of symbol */
142	};
143
144	/* The n_type field is packed :
145
146	7 6 5 4 3 2 1 0
147	^- if set the symbol is externaly visible
148	0 local
149	1 N_EXT external
150	^ ^ ^---- select which section the symbol belongs to
151	0 0 0 0 x N_UNDF, undefined
152	0 0 0 1 x N_ABS, no section, base at 0
153	0 0 1 0 x N_TEXT, text section
154	0 0 1 1 x N_DATA, data section
155	0 1 0 0 x N_BSS, bss section
156	^---------- if set the symbol is a set element
157	1 0 1 0 x N_SETA absolute set element symbol
158	1 0 1 1 x N_SETT text set element symbol
159	1 1 0 0 x N_SETD data set element symbol
160	1 1 0 1 x N_SETB bss set element symbol
161	1 1 1 0 x N_SETV pointer to set vector in data area
162	1 1 1 1 0 N_TYPE mask for all of the above
163
164	1 1 1 0 0 0 0 0 N_STAB type is a stab
165	*/
166
167	#define N_UNDF 0
168	#define N_ABS 2
169	#define N_TEXT 4
170	#define N_DATA 6
171	#define N_BSS 8
172	#define N_FN 15
173	#define N_EXT 1
174	#define N_TYPE 0x1e
175	#define N_STAB 0xe0
176
177	/* The following symbols refer to set elements.
178	All the N_SET[ATDB] symbols with the same name form one set.
179	Space is allocated for the set in the text section, and each set
180	elements value is stored into one word of the space.
181	The first word of the space is the length of the set (number of elements).
182
183	The address of the set is made into an N_SETV symbol
184	whose name is the same as the name of the set.
185	This symbol acts like a N_DATA global symbol
186	in that it can satisfy undefined external references. */
187
188	/* These appear as input to LD, in a .o file. */
189	#define N_SETA 0x14 /* Absolute set element symbol */
190	#define N_SETT 0x16 /* Text set element symbol */
191	#define N_SETD 0x18 /* Data set element symbol */
192	#define N_SETB 0x1A /* Bss set element symbol */
193
194	/* This is output from LD. */
195	#define N_SETV 0x1C /* Pointer to set vector in data area. */
196
197
198	/* Relocations
199
200	There are two types of relocation flavours for a.out systems,
201	standard and extended. The standard form is used on systems where
202	the instruction has room for all the bits of an offset to the operand, whilst the
203	extended form is used when an address operand has to be split over n
204	instructions. Eg, on the 68k, each move instruction can reference
205	the target with a displacement of 16 or 32 bits. On the sparc, move
206	instructions use an offset of 14 bits, so the offset is stored in
207	the reloc field, and the data in the section is ignored.
208	*/
209
210	/* This structure describes a single relocation to be performed.
211	The text-relocation section of the file is a vector of these structures,
212	all of which apply to the text section.
213	Likewise, the data-relocation section applies to the data section. */
214
215	struct reloc_std_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	};
220
221	#define RELOC_STD_BITS_PCREL_BIG 0x80
222	#define RELOC_STD_BITS_PCREL_LITTLE 0x01
223
224	#define RELOC_STD_BITS_LENGTH_BIG 0x60
225	#define RELOC_STD_BITS_LENGTH_SH_BIG 5 /* To shift to units place */
226	#define RELOC_STD_BITS_LENGTH_LITTLE 0x06
227	#define RELOC_STD_BITS_LENGTH_SH_LITTLE 1
228
229	#define RELOC_STD_BITS_EXTERN_BIG 0x10
230	#define RELOC_STD_BITS_EXTERN_LITTLE 0x08
231
232	#define RELOC_STD_BITS_BASEREL_BIG 0x08
233	#define RELOC_STD_BITS_BASEREL_LITTLE 0x08
234
235	#define RELOC_STD_BITS_JMPTABLE_BIG 0x04
236	#define RELOC_STD_BITS_JMPTABLE_LITTLE 0x04
237
238	#define RELOC_STD_BITS_RELATIVE_BIG 0x02
239	#define RELOC_STD_BITS_RELATIVE_LITTLE 0x02
240
241	#define RELOC_STD_SIZE (BYTES_IN_WORD + 3 + 1) /* Bytes per relocation entry */
242
243	struct reloc_std_internal
244	{
245	bfd_vma r_address; /* Address (within segment) to be relocated. */
246	/* The meaning of r_symbolnum depends on r_extern. */
247	unsigned int r_symbolnum:24;
248	/* Nonzero means value is a pc-relative offset
249	and it should be relocated for changes in its own address
250	as well as for changes in the symbol or section specified. */
251	unsigned int r_pcrel:1;
252	/* Length (as exponent of 2) of the field to be relocated.
253	Thus, a value of 2 indicates 1<<2 bytes. */
254	unsigned int r_length:2;
255	/* 1 => relocate with value of symbol.
256	r_symbolnum is the index of the symbol
257	in files the symbol table.
258	0 => relocate with the address of a segment.
259	r_symbolnum is N_TEXT, N_DATA, N_BSS or N_ABS
260	(the N_EXT bit may be set also, but signifies nothing). */
261	unsigned int r_extern:1;
262	/* The next three bits are for SunOS shared libraries, and seem to
263	be undocumented. */
264	unsigned int r_baserel:1; /* Linkage table relative */
265	unsigned int r_jmptable:1; /* pc-relative to jump table */
266	unsigned int r_relative:1; /* "relative relocation" */
267	/* unused */
268	unsigned int r_pad:1; /* Padding -- set to zero */
269	};
270
271
272	/* EXTENDED RELOCS */
273
274	struct reloc_ext_external {
275	bfd_byte r_address[BYTES_IN_WORD]; /* offset of of data to relocate */
276	bfd_byte r_index[3]; /* symbol table index of symbol */
277	bfd_byte r_type[1]; /* relocation type */
278	bfd_byte r_addend[BYTES_IN_WORD]; /* datum addend */
279	};
280
281	#define RELOC_EXT_BITS_EXTERN_BIG 0x80
282	#define RELOC_EXT_BITS_EXTERN_LITTLE 0x01
283
284	#define RELOC_EXT_BITS_TYPE_BIG 0x1F
285	#define RELOC_EXT_BITS_TYPE_SH_BIG 0
286	#define RELOC_EXT_BITS_TYPE_LITTLE 0xF8
287	#define RELOC_EXT_BITS_TYPE_SH_LITTLE 3
288
289	#define RELOC_EXT_SIZE (BYTES_IN_WORD + 3 + 1 + BYTES_IN_WORD) /* Bytes per relocation entry */
290
291	enum reloc_type
292	{
bdedf53f SC	293
	294
	295
	296
	297
a3bb31a0 SC	298	/* simple relocations */
	299	RELOC_8, /* data[0:7] = addend + sv */
	300	RELOC_16, /* data[0:15] = addend + sv */
	301	RELOC_32, /* data[0:31] = addend + sv */
	302	/* pc-rel displacement */
	303	RELOC_DISP8, /* data[0:7] = addend - pc + sv */
	304	RELOC_DISP16, /* data[0:15] = addend - pc + sv */
	305	RELOC_DISP32, /* data[0:31] = addend - pc + sv */
	306	/* Special */
	307	RELOC_WDISP30, /* data[0:29] = (addend + sv - pc)>>2 */
	308	RELOC_WDISP22, /* data[0:21] = (addend + sv - pc)>>2 */
	309	RELOC_HI22, /* data[0:21] = (addend + sv)>>10 */
	310	RELOC_22, /* data[0:21] = (addend + sv) */
	311	RELOC_13, /* data[0:12] = (addend + sv) */
	312	RELOC_LO10, /* data[0:9] = (addend + sv) */
	313	RELOC_SFA_BASE,
	314	RELOC_SFA_OFF13,
	315	/* P.I.C. (base-relative) */
	316	RELOC_BASE10, /* Not sure - maybe we can do this the */
	317	RELOC_BASE13, /* right way now */
	318	RELOC_BASE22,
	319	/* for some sort of pc-rel P.I.C. (?) */
	320	RELOC_PC10,
	321	RELOC_PC22,
	322	/* P.I.C. jump table */
	323	RELOC_JMP_TBL,
	324	/* reputedly for shared libraries somehow */
	325	RELOC_SEGOFF16,
	326	RELOC_GLOB_DAT,
	327	RELOC_JMP_SLOT,
	328	RELOC_RELATIVE,
fcc654cb SC	329
	330	RELOC_11,
	331	RELOC_WDISP2_14,
	332	RELOC_WDISP19,
	333	RELOC_HHI22, /* data[0:21] = (addend + sv) >> 42 */
	334	RELOC_HLO10, /* data[0:9] = (addend + sv) >> 32 */
	335
a3bb31a0 SC	336	/* 29K relocation types */
	337	RELOC_JUMPTARG,
	338	RELOC_CONST,
	339	RELOC_CONSTH,
	340
bdedf53f	341	/* All the new ones I can think of //v9*/
a3bb31a0	342
bdedf53f SC	343	RELOC_64, /* data[0:63] = addend + sv //v9*/
	344	RELOC_DISP64, /* data[0:63] = addend - pc + sv //v9*/
	345	RELOC_WDISP21, /* data[0:20] = (addend + sv - pc)>>2 //v9*/
	346	RELOC_DISP21, /* data[0:20] = addend - pc + sv //v9*/
	347	RELOC_DISP14, /* data[0:13] = addend - pc + sv //v9*/
a3bb31a0 SC	348	/* Q .
	349	What are the other ones,
	350	Since this is a clean slate, can we throw away the ones we dont
	351	understand ? Should we sort the values ? What about using a
	352	microcode format like the 68k ?
	353	*/
	354	NO_RELOC
	355	};
	356
	357
	358	struct reloc_internal {
	359	bfd_vma r_address; /* offset of of data to relocate */
	360	long r_index; /* symbol table index of symbol */
	361	enum reloc_type r_type; /* relocation type */
	362	bfd_vma r_addend; /* datum addend */
	363	};
	364
	365	/* Q.
	366	Should the length of the string table be 4 bytes or 8 bytes ?
	367
	368	Q.
	369	What about archive indexes ?
	370
	371	*/
	372
	373	#endif /* __A_OUT_GNU_H__ */