[binutils.git] / gas / a.out.gnu.h

#ifndef __A_OUT_GNU_H__
#define __A_OUT_GNU_H__

#include "aout/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,
	M_RS6000 = 102,	/* IBM RS/6000 */
	/* 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;
	/*  RS/6000 compiler does not support enum bitfield 
	    enum reloc_type r_type:5; */
	enum reloc_type r_type;
	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 */

#ifndef CUSTOM_RELOC_FORMAT
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 /* CUSTOM_RELOC_FORMAT */

#endif /* __A_OUT_GNU_H__ */

/* end of a.out.gnu.h */
Commit	Line	Data
61a153e5 RP	1	#ifndef __A_OUT_GNU_H__
	2	#define __A_OUT_GNU_H__
	3
af483be8	4	#include "aout/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 {
a39116f1 RP	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];
bad3df67 JG	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
61a153e5 RP	31	{
a39116f1 RP	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 */
61a153e5 RP	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 {
a39116f1 RP	51	M_UNKNOWN = 0,
	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,
	58	M_RS6000 = 102, /* IBM RS/6000 */
	59	/* HP/BSD formats */
	60	M_HP200 = 200, /* hp200 (68010) BSD binary */
	61	M_HP300 = 300, /* hp300 (68020+68881) BSD binary */
	62	M_HPUX23 = 0x020C, /* hp200/300 HPUX binary */
61a153e5 RP	63	};
	64
	65	#define N_MAGIC(exec) ((exec).a_info & 0xffff)
	66	#define N_MACHTYPE(exec) ((enum machine_type)(((exec).a_info >> 16) & 0xff))
	67	#define N_FLAGS(exec) (((exec).a_info >> 24) & 0xff)
	68	#define N_SET_INFO(exec, magic, type, flags) \
a39116f1 RP	69	((exec).a_info = ((magic) & 0xffff) \
	70	\| (((int)(type) & 0xff) << 16) \
	71	\| (((flags) & 0xff) << 24))
61a153e5	72	#define N_SET_MAGIC(exec, magic) \
a39116f1	73	((exec).a_info = (((exec).a_info & 0xffff0000) \| ((magic) & 0xffff)))
61a153e5 RP	74
61a153e5 RP	75	#define N_SET_MACHTYPE(exec, machtype) \
a39116f1 RP	76	((exec).a_info = \
a39116f1 RP	77	((exec).a_info&0xff00ffff) \| ((((int)(machtype))&0xff) << 16))
61a153e5 RP	78
61a153e5 RP	79	#define N_SET_FLAGS(exec, flags) \
a39116f1 RP	80	((exec).a_info = \
a39116f1 RP	81	((exec).a_info&0x00ffffff) \| (((flags) & 0xff) << 24))
61a153e5 RP	82
	83	/* Code indicating object file or impure executable. */
	84	#define OMAGIC 0407
	85	/* Code indicating pure executable. */
	86	#define NMAGIC 0410
	87	/* Code indicating demand-paged executable. */
	88	#define ZMAGIC 0413
	89
bad3df67 JG	90	/* Virtual Address of text segment from the a.out file. For OMAGIC,
bad3df67 JG	91	(almost always "unlinked .o's" these days), should be zero.
bad3df67 JG	92	For linked files, should reflect reality if we know it. */
	93
	94	#ifndef N_TXTADDR
66d4e1bb JG	95	#define N_TXTADDR(x) (N_MAGIC(x)==OMAGIC? 0 : TEXT_START_ADDR)
	96	#endif
	97
	98	#ifndef N_BADMAG
	99	#define N_BADMAG(x) (N_MAGIC(x) != OMAGIC \
a39116f1 RP	100	&& N_MAGIC(x) != NMAGIC \
a39116f1 RP	101	&& N_MAGIC(x) != ZMAGIC)
66d4e1bb JG	102	#endif
66d4e1bb JG	103
d7f8f106 JG	104	/* By default, segment size is constant. But on some machines, it can
	105	be a function of the a.out header (e.g. machine type). */
	106	#ifndef N_SEGSIZE
	107	#define N_SEGSIZE(x) SEGMENT_SIZE
	108	#endif
a39116f1 RP	109
a39116f1 RP	110	/* This complexity is for encapsulated COFF support */
66d4e1bb	111	#ifndef _N_HDROFF
d7f8f106	112	#define _N_HDROFF(x) (N_SEGSIZE(x) - sizeof (struct exec))
66d4e1bb JG	113	#endif
	114
	115	#ifndef N_TXTOFF
	116	#define N_TXTOFF(x) (N_MAGIC(x) == ZMAGIC ? \
a39116f1 RP	117	_N_HDROFF((x)) + sizeof (struct exec) : \
a39116f1 RP	118	sizeof (struct exec))
66d4e1bb JG	119	#endif
	120
	121
	122	#ifndef N_DATOFF
	123	#define N_DATOFF(x) ( N_TXTOFF(x) + (x).a_text )
	124	#endif
	125
	126	#ifndef N_TRELOFF
	127	#define N_TRELOFF(x) ( N_DATOFF(x) + (x).a_data )
	128	#endif
	129
	130	#ifndef N_DRELOFF
	131	#define N_DRELOFF(x) ( N_TRELOFF(x) + (x).a_trsize )
bad3df67	132	#endif
61a153e5	133
66d4e1bb JG	134	#ifndef N_SYMOFF
66d4e1bb JG	135	#define N_SYMOFF(x) ( N_DRELOFF(x) + (x).a_drsize )
61a153e5	136	#endif
66d4e1bb JG	137
	138	#ifndef N_STROFF
	139	#define N_STROFF(x) ( N_SYMOFF(x) + (x).a_syms )
61a153e5	140	#endif
66d4e1bb JG	141
	142	/* Address of text segment in memory after it is loaded. */
	143	#ifndef N_TXTADDR
	144	#define N_TXTADDR(x) 0
61a153e5	145	#endif
a39116f1	146
61a153e5 RP	147	#ifndef N_DATADDR
61a153e5 RP	148	#define N_DATADDR(x) \
bad3df67	149	(N_MAGIC(x)==OMAGIC? (N_TXTADDR(x)+(x).a_text) \
d7f8f106	150	: (N_SEGSIZE(x) + ((N_TXTADDR(x)+(x).a_text-1) & ~(N_SEGSIZE(x)-1))))
61a153e5 RP	151	#endif
	152
	153	/* Address of bss segment in memory after it is loaded. */
	154	#define N_BSSADDR(x) (N_DATADDR(x) + (x).a_data)
	155	\f
	156	struct nlist {
a39116f1 RP	157	union {
	158	char *n_name;
	159	struct nlist *n_next;
	160	long n_strx;
	161	} n_un;
	162	unsigned char n_type;
	163	char n_other;
	164	short n_desc;
	165	unsigned long n_value;
61a153e5 RP	166	};
	167
	168	#define N_UNDF 0
	169	#define N_ABS 2
	170	#define N_TEXT 4
	171	#define N_DATA 6
	172	#define N_BSS 8
e557edcf	173	#define N_COMM 0x12 /* common (visible in shared lib commons) */
30c52cdf	174	#define N_FN 0x1F /* File name of a .o file */
61a153e5	175
30c52cdf JG	176	/* Note: N_EXT can only usefully be OR-ed with N_UNDF, N_ABS, N_TEXT,
	177	N_DATA, or N_BSS. When the low-order bit of other types is set,
	178	(e.g. N_WARNING versus N_FN), they are two different types. */
61a153e5 RP	179	#define N_EXT 1
	180	#define N_TYPE 036
	181	#define N_STAB 0340
	182
	183	/* The following type indicates the definition of a symbol as being
	184	an indirect reference to another symbol. The other symbol
	185	appears as an undefined reference, immediately following this symbol.
a39116f1	186
61a153e5 RP	187	Indirection is asymmetrical. The other symbol's value will be used
	188	to satisfy requests for the indirect symbol, but not vice versa.
	189	If the other symbol does not have a definition, libraries will
	190	be searched to find a definition. */
e929a4c5	191
9bbfd057	192	#define N_INDR 0xa
61a153e5 RP	193
	194	/* The following symbols refer to set elements.
	195	All the N_SET[ATDB] symbols with the same name form one set.
	196	Space is allocated for the set in the text section, and each set
	197	element's value is stored into one word of the space.
	198	The first word of the space is the length of the set (number of elements).
a39116f1	199
61a153e5 RP	200	The address of the set is made into an N_SETV symbol
	201	whose name is the same as the name of the set.
	202	This symbol acts like a N_DATA global symbol
	203	in that it can satisfy undefined external references. */
	204
	205	/* These appear as input to LD, in a .o file. */
	206	#define N_SETA 0x14 /* Absolute set element symbol */
	207	#define N_SETT 0x16 /* Text set element symbol */
	208	#define N_SETD 0x18 /* Data set element symbol */
	209	#define N_SETB 0x1A /* Bss set element symbol */
	210
	211	/* This is output from LD. */
	212	#define N_SETV 0x1C /* Pointer to set vector in data area. */
e557edcf JG	213
	214	/* Warning symbol. The text gives a warning message, the next symbol
	215	in the table will be undefined. When the symbol is referenced, the
	216	message is printed. */
	217
	218	#define N_WARNING 0x1e
61a153e5 RP	219	\f
	220	/* This structure describes a single relocation to be performed.
	221	The text-relocation section of the file is a vector of these structures,
	222	all of which apply to the text section.
	223	Likewise, the data-relocation section applies to the data section. */
	224
bad3df67 JG	225	/* The following enum and struct were borrowed from SunOS's
	226	/usr/include/sun4/a.out.h and extended to handle
	227	other machines. It is currently used on SPARC and AMD 29000.
a39116f1	228
bad3df67 JG	229	reloc_ext_bytes is how it looks on disk. reloc_info_extended is
bad3df67 JG	230	how we might process it on a native host. */
61a153e5	231
bad3df67	232	struct reloc_ext_bytes {
a39116f1 RP	233	unsigned char r_address[4];
	234	unsigned char r_index[3];
	235	unsigned char r_bits[1];
	236	unsigned char r_addend[4];
61a153e5 RP	237	};
61a153e5 RP	238
bad3df67 JG	239	#define RELOC_EXT_BITS_EXTERN_BIG 0x80
	240	#define RELOC_EXT_BITS_EXTERN_LITTLE 0x01
	241
	242	#define RELOC_EXT_BITS_TYPE_BIG 0x1F
	243	#define RELOC_EXT_BITS_TYPE_SH_BIG 0
	244	#define RELOC_EXT_BITS_TYPE_LITTLE 0xF8
	245	#define RELOC_EXT_BITS_TYPE_SH_LITTLE 3
	246
	247	#define RELOC_EXT_SIZE 12 /* Bytes per relocation entry */
61a153e5 RP	248
	249	struct reloc_info_extended
	250	{
a39116f1 RP	251	unsigned long r_address;
a39116f1 RP	252	unsigned int r_index:24;
61a153e5	253	# define r_symbolnum r_index
a39116f1 RP	254	unsigned r_extern:1;
	255	unsigned :2;
	256	/* RS/6000 compiler does not support enum bitfield
	257	enum reloc_type r_type:5; */
	258	enum reloc_type r_type;
	259	long int r_addend;
61a153e5 RP	260	};
61a153e5 RP	261
bad3df67 JG	262	/* The standard, old-fashioned, Berkeley compatible relocation struct */
	263
	264	struct reloc_std_bytes {
a39116f1 RP	265	unsigned char r_address[4];
	266	unsigned char r_index[3];
	267	unsigned char r_bits[1];
61a153e5 RP	268	};
61a153e5 RP	269
bad3df67 JG	270	#define RELOC_STD_BITS_PCREL_BIG 0x80
	271	#define RELOC_STD_BITS_PCREL_LITTLE 0x01
	272
	273	#define RELOC_STD_BITS_LENGTH_BIG 0x60
	274	#define RELOC_STD_BITS_LENGTH_SH_BIG 5 /* To shift to units place */
	275	#define RELOC_STD_BITS_LENGTH_LITTLE 0x06
	276	#define RELOC_STD_BITS_LENGTH_SH_LITTLE 1
	277
	278	#define RELOC_STD_BITS_EXTERN_BIG 0x10
	279	#define RELOC_STD_BITS_EXTERN_LITTLE 0x08
	280
	281	#define RELOC_STD_BITS_BASEREL_BIG 0x08
	282	#define RELOC_STD_BITS_BASEREL_LITTLE 0x08
	283
	284	#define RELOC_STD_BITS_JMPTABLE_BIG 0x04
	285	#define RELOC_STD_BITS_JMPTABLE_LITTLE 0x04
	286
	287	#define RELOC_STD_BITS_RELATIVE_BIG 0x02
	288	#define RELOC_STD_BITS_RELATIVE_LITTLE 0x02
61a153e5	289
bad3df67	290	#define RELOC_STD_SIZE 8 /* Bytes per relocation entry */
61a153e5	291
f0494a6e	292	#ifndef CUSTOM_RELOC_FORMAT
61a153e5 RP	293	struct relocation_info
61a153e5 RP	294	{
a39116f1 RP	295	/* Address (within segment) to be relocated. */
	296	int r_address;
	297	/* The meaning of r_symbolnum depends on r_extern. */
	298	unsigned int r_symbolnum:24;
	299	/* Nonzero means value is a pc-relative offset
	300	and it should be relocated for changes in its own address
	301	as well as for changes in the symbol or section specified. */
	302	unsigned int r_pcrel:1;
	303	/* Length (as exponent of 2) of the field to be relocated.
	304	Thus, a value of 2 indicates 1<<2 bytes. */
	305	unsigned int r_length:2;
	306	/* 1 => relocate with value of symbol.
	307	r_symbolnum is the index of the symbol
	308	in file's the symbol table.
	309	0 => relocate with the address of a segment.
	310	r_symbolnum is N_TEXT, N_DATA, N_BSS or N_ABS
	311	(the N_EXT bit may be set also, but signifies nothing). */
	312	unsigned int r_extern:1;
	313	/* The next three bits are for SunOS shared libraries, and seem to
	314	be undocumented. */
	315	unsigned int r_baserel:1; /* Linkage table relative */
	316	unsigned int r_jmptable:1; /* pc-relative to jump table */
	317
f827120d RP	318	#ifdef TC_NS32K
	319	#define r_bsr r_baserel
	320	#define r_disp r_jmptable
	321	#endif /* TC_NS32K */
a39116f1 RP	322
	323	unsigned int r_relative:1; /* "relative relocation" */
	324	/* unused */
	325	unsigned int r_pad:1; /* Padding -- set to zero */
61a153e5	326	};
f0494a6e	327	#endif /* CUSTOM_RELOC_FORMAT */
61a153e5	328
61a153e5	329	#endif /* __A_OUT_GNU_H__ */
a39116f1 RP	330
a39116f1 RP	331	/* end of a.out.gnu.h */