[deliverable/binutils-gdb.git] / gas / a.out.gnu.h

#ifndef __A_OUT_GNU_H__
#define __A_OUT_GNU_H__

#include "reloc.h"

#define __GNU_EXEC_MACROS__

#ifndef __STRUCT_EXEC_OVERRIDE__

/* This is the layout on disk of a Unix V7, Berkeley, SunOS, Vax Ultrix
   "struct exec".  Don't assume that on this machine, the "struct exec"
   will lay out the same sizes or alignments.  */

struct exec_bytes {
  unsigned char a_info[4];
  unsigned char a_text[4];
  unsigned char a_data[4];
  unsigned char a_bss[4];
  unsigned char a_syms[4];
  unsigned char a_entry[4];
  unsigned char a_trsize[4];
  unsigned char a_drsize[4];
};

/* How big the "struct exec" is on disk */
#define	EXEC_BYTES_SIZE	(8 * 4)

/* This is the layout in memory of a "struct exec" while we process it.  */

struct exec
{
  unsigned long a_info;		/* Use macros N_MAGIC, etc for access */
  unsigned a_text;		/* length of text, in bytes */
  unsigned a_data;		/* length of data, in bytes */
  unsigned a_bss;		/* length of uninitialized data area for file, in bytes */
  unsigned a_syms;		/* length of symbol table data in file, in bytes */
  unsigned a_entry;		/* start address */
  unsigned a_trsize;		/* length of relocation info for text, in bytes */
  unsigned a_drsize;		/* length of relocation info for data, in bytes */
};

#endif /* __STRUCT_EXEC_OVERRIDE__ */

/* these go in the N_MACHTYPE field */
/* These symbols could be defined by code from Suns...punt 'em */
#undef M_UNKNOWN
#undef M_68010
#undef M_68020
#undef M_SPARC
enum machine_type {
  M_UNKNOWN = 0,
  M_68010 = 1,
  M_68020 = 2,
  M_SPARC = 3,
  /* skip a bunch so we don't run into any of sun's numbers */
  M_386 = 100,
  M_29K = 101,
  /* HP/BSD formats */
  M_HP200 = 200,	/* hp200 (68010) BSD binary */
  M_HP300 = 300,	/* hp300 (68020+68881) BSD binary */
  M_HPUX23 = 0x020C,	/* hp200/300 HPUX binary */
};

#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))

/* Code indicating object file or impure executable.  */
#define OMAGIC 0407
/* Code indicating pure executable.  */
#define NMAGIC 0410
/* Code indicating demand-paged executable.  */
#define ZMAGIC 0413

/* Virtual Address of text segment from the a.out file.  For OMAGIC,
   (almost always "unlinked .o's" these days), should be zero.
   For linked files, should reflect reality if we know it.  */

#ifndef N_TXTADDR
#define N_TXTADDR(x)	(N_MAGIC(x)==OMAGIC? 0 : TEXT_START_ADDR)
#endif

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

/* 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

/* This complexity is for encapsulated COFF support */
#ifndef _N_HDROFF
#define _N_HDROFF(x)	(N_SEGSIZE(x) - sizeof (struct exec))
#endif

#ifndef N_TXTOFF
#define N_TXTOFF(x)	(N_MAGIC(x) == ZMAGIC ?	\
				_N_HDROFF((x)) + sizeof (struct exec) :	\
				sizeof (struct exec))
#endif


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

#ifndef N_TRELOFF
#define N_TRELOFF(x)	( N_DATOFF(x) + (x).a_data )
#endif

#ifndef N_DRELOFF
#define N_DRELOFF(x)	( N_TRELOFF(x) + (x).a_trsize )
#endif

#ifndef N_SYMOFF
#define N_SYMOFF(x)	( N_DRELOFF(x) + (x).a_drsize )
#endif

#ifndef N_STROFF
#define N_STROFF(x)	( N_SYMOFF(x) + (x).a_syms )
#endif

/* Address of text segment in memory after it is loaded.  */
#ifndef N_TXTADDR
#define	N_TXTADDR(x)	0
#endif

#ifndef N_DATADDR
#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))))
#endif

/* Address of bss segment in memory after it is loaded.  */
#define N_BSSADDR(x) (N_DATADDR(x) + (x).a_data)
\f
struct nlist {
  union {
    char *n_name;
    struct nlist *n_next;
    long n_strx;
  } n_un;
  unsigned char n_type;
  char n_other;
  short n_desc;
  unsigned long n_value;
};

#define N_UNDF 0
#define N_ABS 2
#define N_TEXT 4
#define N_DATA 6
#define N_BSS 8
#define	N_COMM	0x12		/* common (visible in shared lib commons) */
#define N_FN 0x1F		/* File name of a .o file */

/* Note: N_EXT can only usefully be 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
#define N_TYPE 036
#define N_STAB 0340

/* The following type indicates the definition of a symbol as being
   an indirect reference to another symbol.  The other symbol
   appears as an undefined reference, immediately following this symbol.

   Indirection is asymmetrical.  The other symbol's value will be used
   to satisfy requests for the indirect symbol, but not vice versa.
   If the other symbol does not have a definition, libraries will
   be searched to find a definition.  */

#define N_INDR 0xa

/* 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
   element's 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
\f
/* 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.  */

/* The following enum and struct were borrowed from SunOS's
   /usr/include/sun4/a.out.h  and extended to handle
   other machines.  It is currently used on SPARC and AMD 29000.

   reloc_ext_bytes is how it looks on disk.  reloc_info_extended is
   how we might process it on a native host.  */

struct reloc_ext_bytes {
  unsigned char	r_address[4];
  unsigned char r_index[3];
  unsigned char r_bits[1];
  unsigned char r_addend[4];
};

#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	12		/* Bytes per relocation entry */

struct reloc_info_extended
{
  unsigned long r_address;
  unsigned int  r_index:24;
# define	r_symbolnum  r_index
  unsigned	r_extern:1;
  unsigned	:2;
  enum reloc_type r_type:5;
  long int	r_addend;
};

/* The standard, old-fashioned, Berkeley compatible relocation struct */

struct reloc_std_bytes {
  unsigned char	r_address[4];
  unsigned char r_index[3];
  unsigned char r_bits[1];
};

#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	8		/* Bytes per relocation entry */

struct relocation_info
{
  /* Address (within segment) to be relocated.  */
  int r_address;
  /* 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 file's 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 */

#ifdef TC_NS32K
#define r_bsr	r_baserel
#define r_disp	r_jmptable
#endif /* TC_NS32K */

  unsigned int r_relative:1;	/* "relative relocation" */
  /* unused */
  unsigned int r_pad:1;		/* Padding -- set to zero */
};

#endif /* __A_OUT_GNU_H__ */
Commit	Line	Data
61a153e5 RP	1	#ifndef __A_OUT_GNU_H__
	2	#define __A_OUT_GNU_H__
	3
bad3df67	4	#include "reloc.h"
61a153e5 RP	5
	6	#define __GNU_EXEC_MACROS__
	7
	8	#ifndef __STRUCT_EXEC_OVERRIDE__
	9
bad3df67 JG	10	/* This is the layout on disk of a Unix V7, Berkeley, SunOS, Vax Ultrix
	11	"struct exec". Don't assume that on this machine, the "struct exec"
	12	will lay out the same sizes or alignments. */
	13
	14	struct exec_bytes {
	15	unsigned char a_info[4];
	16	unsigned char a_text[4];
	17	unsigned char a_data[4];
	18	unsigned char a_bss[4];
	19	unsigned char a_syms[4];
	20	unsigned char a_entry[4];
	21	unsigned char a_trsize[4];
	22	unsigned char a_drsize[4];
	23	};
	24
	25	/* How big the "struct exec" is on disk */
	26	#define EXEC_BYTES_SIZE (8 * 4)
	27
	28	/* This is the layout in memory of a "struct exec" while we process it. */
	29
61a153e5 RP	30	struct exec
	31	{
	32	unsigned long a_info; /* Use macros N_MAGIC, etc for access */
	33	unsigned a_text; /* length of text, in bytes */
	34	unsigned a_data; /* length of data, in bytes */
	35	unsigned a_bss; /* length of uninitialized data area for file, in bytes */
	36	unsigned a_syms; /* length of symbol table data in file, in bytes */
	37	unsigned a_entry; /* start address */
	38	unsigned a_trsize; /* length of relocation info for text, in bytes */
	39	unsigned a_drsize; /* length of relocation info for data, in bytes */
	40	};
	41
	42	#endif /* __STRUCT_EXEC_OVERRIDE__ */
	43
	44	/* these go in the N_MACHTYPE field */
	45	/* These symbols could be defined by code from Suns...punt 'em */
bad3df67	46	#undef M_UNKNOWN
61a153e5 RP	47	#undef M_68010
	48	#undef M_68020
	49	#undef M_SPARC
	50	enum machine_type {
bad3df67	51	M_UNKNOWN = 0,
61a153e5 RP	52	M_68010 = 1,
	53	M_68020 = 2,
	54	M_SPARC = 3,
	55	/* skip a bunch so we don't run into any of sun's numbers */
	56	M_386 = 100,
	57	M_29K = 101,
5dd477d4 JG	58	/* HP/BSD formats */
	59	M_HP200 = 200, /* hp200 (68010) BSD binary */
	60	M_HP300 = 300, /* hp300 (68020+68881) BSD binary */
	61	M_HPUX23 = 0x020C, /* hp200/300 HPUX binary */
61a153e5 RP	62	};
	63
	64	#define N_MAGIC(exec) ((exec).a_info & 0xffff)
	65	#define N_MACHTYPE(exec) ((enum machine_type)(((exec).a_info >> 16) & 0xff))
	66	#define N_FLAGS(exec) (((exec).a_info >> 24) & 0xff)
	67	#define N_SET_INFO(exec, magic, type, flags) \
	68	((exec).a_info = ((magic) & 0xffff) \
	69	\| (((int)(type) & 0xff) << 16) \
	70	\| (((flags) & 0xff) << 24))
	71	#define N_SET_MAGIC(exec, magic) \
	72	((exec).a_info = (((exec).a_info & 0xffff0000) \| ((magic) & 0xffff)))
	73
	74	#define N_SET_MACHTYPE(exec, machtype) \
	75	((exec).a_info = \
	76	((exec).a_info&0xff00ffff) \| ((((int)(machtype))&0xff) << 16))
	77
	78	#define N_SET_FLAGS(exec, flags) \
	79	((exec).a_info = \
	80	((exec).a_info&0x00ffffff) \| (((flags) & 0xff) << 24))
	81
	82	/* Code indicating object file or impure executable. */
	83	#define OMAGIC 0407
	84	/* Code indicating pure executable. */
	85	#define NMAGIC 0410
	86	/* Code indicating demand-paged executable. */
	87	#define ZMAGIC 0413
	88
bad3df67 JG	89	/* Virtual Address of text segment from the a.out file. For OMAGIC,
bad3df67 JG	90	(almost always "unlinked .o's" these days), should be zero.
bad3df67 JG	91	For linked files, should reflect reality if we know it. */
	92
	93	#ifndef N_TXTADDR
66d4e1bb JG	94	#define N_TXTADDR(x) (N_MAGIC(x)==OMAGIC? 0 : TEXT_START_ADDR)
	95	#endif
	96
	97	#ifndef N_BADMAG
	98	#define N_BADMAG(x) (N_MAGIC(x) != OMAGIC \
	99	&& N_MAGIC(x) != NMAGIC \
	100	&& N_MAGIC(x) != ZMAGIC)
	101	#endif
	102
d7f8f106 JG	103	/* By default, segment size is constant. But on some machines, it can
	104	be a function of the a.out header (e.g. machine type). */
	105	#ifndef N_SEGSIZE
	106	#define N_SEGSIZE(x) SEGMENT_SIZE
	107	#endif
	108
66d4e1bb JG	109	/* This complexity is for encapsulated COFF support */
66d4e1bb JG	110	#ifndef _N_HDROFF
d7f8f106	111	#define _N_HDROFF(x) (N_SEGSIZE(x) - sizeof (struct exec))
66d4e1bb JG	112	#endif
	113
	114	#ifndef N_TXTOFF
	115	#define N_TXTOFF(x) (N_MAGIC(x) == ZMAGIC ? \
	116	_N_HDROFF((x)) + sizeof (struct exec) : \
	117	sizeof (struct exec))
	118	#endif
	119
	120
	121	#ifndef N_DATOFF
	122	#define N_DATOFF(x) ( N_TXTOFF(x) + (x).a_text )
	123	#endif
	124
	125	#ifndef N_TRELOFF
	126	#define N_TRELOFF(x) ( N_DATOFF(x) + (x).a_data )
	127	#endif
	128
	129	#ifndef N_DRELOFF
	130	#define N_DRELOFF(x) ( N_TRELOFF(x) + (x).a_trsize )
bad3df67	131	#endif
61a153e5	132
66d4e1bb JG	133	#ifndef N_SYMOFF
66d4e1bb JG	134	#define N_SYMOFF(x) ( N_DRELOFF(x) + (x).a_drsize )
61a153e5	135	#endif
66d4e1bb JG	136
	137	#ifndef N_STROFF
	138	#define N_STROFF(x) ( N_SYMOFF(x) + (x).a_syms )
61a153e5	139	#endif
66d4e1bb JG	140
	141	/* Address of text segment in memory after it is loaded. */
	142	#ifndef N_TXTADDR
	143	#define N_TXTADDR(x) 0
61a153e5	144	#endif
61a153e5 RP	145
	146	#ifndef N_DATADDR
	147	#define N_DATADDR(x) \
bad3df67	148	(N_MAGIC(x)==OMAGIC? (N_TXTADDR(x)+(x).a_text) \
d7f8f106	149	: (N_SEGSIZE(x) + ((N_TXTADDR(x)+(x).a_text-1) & ~(N_SEGSIZE(x)-1))))
61a153e5 RP	150	#endif
	151
	152	/* Address of bss segment in memory after it is loaded. */
	153	#define N_BSSADDR(x) (N_DATADDR(x) + (x).a_data)
	154	\f
	155	struct nlist {
	156	union {
	157	char *n_name;
	158	struct nlist *n_next;
	159	long n_strx;
	160	} n_un;
	161	unsigned char n_type;
	162	char n_other;
	163	short n_desc;
	164	unsigned long n_value;
	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
e557edcf	172	#define N_COMM 0x12 /* common (visible in shared lib commons) */
30c52cdf	173	#define N_FN 0x1F /* File name of a .o file */
61a153e5	174
30c52cdf JG	175	/* Note: N_EXT can only usefully be OR-ed with N_UNDF, N_ABS, N_TEXT,
	176	N_DATA, or N_BSS. When the low-order bit of other types is set,
	177	(e.g. N_WARNING versus N_FN), they are two different types. */
61a153e5 RP	178	#define N_EXT 1
	179	#define N_TYPE 036
	180	#define N_STAB 0340
	181
	182	/* The following type indicates the definition of a symbol as being
	183	an indirect reference to another symbol. The other symbol
	184	appears as an undefined reference, immediately following this symbol.
	185
	186	Indirection is asymmetrical. The other symbol's value will be used
	187	to satisfy requests for the indirect symbol, but not vice versa.
	188	If the other symbol does not have a definition, libraries will
	189	be searched to find a definition. */
e929a4c5	190
9bbfd057	191	#define N_INDR 0xa
61a153e5 RP	192
	193	/* The following symbols refer to set elements.
	194	All the N_SET[ATDB] symbols with the same name form one set.
	195	Space is allocated for the set in the text section, and each set
	196	element's value is stored into one word of the space.
	197	The first word of the space is the length of the set (number of elements).
	198
	199	The address of the set is made into an N_SETV symbol
	200	whose name is the same as the name of the set.
	201	This symbol acts like a N_DATA global symbol
	202	in that it can satisfy undefined external references. */
	203
	204	/* These appear as input to LD, in a .o file. */
	205	#define N_SETA 0x14 /* Absolute set element symbol */
	206	#define N_SETT 0x16 /* Text set element symbol */
	207	#define N_SETD 0x18 /* Data set element symbol */
	208	#define N_SETB 0x1A /* Bss set element symbol */
	209
	210	/* This is output from LD. */
	211	#define N_SETV 0x1C /* Pointer to set vector in data area. */
e557edcf JG	212
	213	/* Warning symbol. The text gives a warning message, the next symbol
	214	in the table will be undefined. When the symbol is referenced, the
	215	message is printed. */
	216
	217	#define N_WARNING 0x1e
61a153e5 RP	218	\f
	219	/* This structure describes a single relocation to be performed.
	220	The text-relocation section of the file is a vector of these structures,
	221	all of which apply to the text section.
	222	Likewise, the data-relocation section applies to the data section. */
	223
bad3df67 JG	224	/* The following enum and struct were borrowed from SunOS's
	225	/usr/include/sun4/a.out.h and extended to handle
	226	other machines. It is currently used on SPARC and AMD 29000.
61a153e5	227
bad3df67 JG	228	reloc_ext_bytes is how it looks on disk. reloc_info_extended is
bad3df67 JG	229	how we might process it on a native host. */
61a153e5	230
bad3df67 JG	231	struct reloc_ext_bytes {
	232	unsigned char r_address[4];
	233	unsigned char r_index[3];
	234	unsigned char r_bits[1];
	235	unsigned char r_addend[4];
61a153e5 RP	236	};
61a153e5 RP	237
bad3df67 JG	238	#define RELOC_EXT_BITS_EXTERN_BIG 0x80
	239	#define RELOC_EXT_BITS_EXTERN_LITTLE 0x01
	240
	241	#define RELOC_EXT_BITS_TYPE_BIG 0x1F
	242	#define RELOC_EXT_BITS_TYPE_SH_BIG 0
	243	#define RELOC_EXT_BITS_TYPE_LITTLE 0xF8
	244	#define RELOC_EXT_BITS_TYPE_SH_LITTLE 3
	245
	246	#define RELOC_EXT_SIZE 12 /* Bytes per relocation entry */
61a153e5 RP	247
	248	struct reloc_info_extended
	249	{
	250	unsigned long r_address;
	251	unsigned int r_index:24;
	252	# define r_symbolnum r_index
	253	unsigned r_extern:1;
	254	unsigned :2;
	255	enum reloc_type r_type:5;
	256	long int r_addend;
	257	};
	258
bad3df67 JG	259	/* The standard, old-fashioned, Berkeley compatible relocation struct */
	260
	261	struct reloc_std_bytes {
	262	unsigned char r_address[4];
	263	unsigned char r_index[3];
	264	unsigned char r_bits[1];
61a153e5 RP	265	};
61a153e5 RP	266
bad3df67 JG	267	#define RELOC_STD_BITS_PCREL_BIG 0x80
	268	#define RELOC_STD_BITS_PCREL_LITTLE 0x01
	269
	270	#define RELOC_STD_BITS_LENGTH_BIG 0x60
	271	#define RELOC_STD_BITS_LENGTH_SH_BIG 5 /* To shift to units place */
	272	#define RELOC_STD_BITS_LENGTH_LITTLE 0x06
	273	#define RELOC_STD_BITS_LENGTH_SH_LITTLE 1
	274
	275	#define RELOC_STD_BITS_EXTERN_BIG 0x10
	276	#define RELOC_STD_BITS_EXTERN_LITTLE 0x08
	277
	278	#define RELOC_STD_BITS_BASEREL_BIG 0x08
	279	#define RELOC_STD_BITS_BASEREL_LITTLE 0x08
	280
	281	#define RELOC_STD_BITS_JMPTABLE_BIG 0x04
	282	#define RELOC_STD_BITS_JMPTABLE_LITTLE 0x04
	283
	284	#define RELOC_STD_BITS_RELATIVE_BIG 0x02
	285	#define RELOC_STD_BITS_RELATIVE_LITTLE 0x02
61a153e5	286
bad3df67	287	#define RELOC_STD_SIZE 8 /* Bytes per relocation entry */
61a153e5 RP	288
	289	struct relocation_info
	290	{
	291	/* Address (within segment) to be relocated. */
	292	int r_address;
	293	/* The meaning of r_symbolnum depends on r_extern. */
	294	unsigned int r_symbolnum:24;
	295	/* Nonzero means value is a pc-relative offset
	296	and it should be relocated for changes in its own address
	297	as well as for changes in the symbol or section specified. */
	298	unsigned int r_pcrel:1;
	299	/* Length (as exponent of 2) of the field to be relocated.
	300	Thus, a value of 2 indicates 1<<2 bytes. */
	301	unsigned int r_length:2;
	302	/* 1 => relocate with value of symbol.
	303	r_symbolnum is the index of the symbol
	304	in file's the symbol table.
	305	0 => relocate with the address of a segment.
	306	r_symbolnum is N_TEXT, N_DATA, N_BSS or N_ABS
	307	(the N_EXT bit may be set also, but signifies nothing). */
	308	unsigned int r_extern:1;
bad3df67 JG	309	/* The next three bits are for SunOS shared libraries, and seem to
	310	be undocumented. */
	311	unsigned int r_baserel:1; /* Linkage table relative */
	312	unsigned int r_jmptable:1; /* pc-relative to jump table */
f827120d RP	313
	314	#ifdef TC_NS32K
	315	#define r_bsr r_baserel
	316	#define r_disp r_jmptable
	317	#endif /* TC_NS32K */
	318
bad3df67 JG	319	unsigned int r_relative:1; /* "relative relocation" */
	320	/* unused */
	321	unsigned int r_pad:1; /* Padding -- set to zero */
61a153e5 RP	322	};
61a153e5 RP	323
61a153e5	324	#endif /* __A_OUT_GNU_H__ */