/* This file is aout_gnu.h
- Copyright (C) 1987-1992 Free Software Foundation, Inc.
-
+ Copyright 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 2000, 2002,
+ 2005, 2007 Free Software Foundation, Inc.
+
This file is part of GAS, the GNU Assembler.
-
+
GAS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
+ the Free Software Foundation; either version 3, or (at your option)
any later version.
-
+
GAS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
-
+
You should have received a copy of the GNU General Public License
along with GAS; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+ the Free Software Foundation, 51 Franklin Street - Fifth Floor,
+ Boston, MA 02110-1301, USA. */
#ifndef __A_OUT_GNU_H__
#define __A_OUT_GNU_H__
relocations, and one which uses extended relocations.
Today, the extended reloc uses are
- TC_SPARC, TC_A29K
+ TC_SPARC
each must define the enum reloc_type
*/
-#define USE_EXTENDED_RELOC (defined(TC_SPARC) || defined(TC_A29K))
-
-#if defined(TC_SPARC) || defined(TC_A29K)
-enum reloc_type {
- RELOC_8, RELOC_16, RELOC_32, /* simple relocations */
- RELOC_DISP8, RELOC_DISP16, RELOC_DISP32, /* pc-rel displacement */
- RELOC_WDISP30, RELOC_WDISP22,
- RELOC_HI22, RELOC_22,
- RELOC_13, RELOC_LO10,
- RELOC_SFA_BASE, RELOC_SFA_OFF13,
- RELOC_BASE10, RELOC_BASE13, RELOC_BASE22, /* P.I.C. (base-relative) */
- RELOC_PC10, RELOC_PC22, /* for some sort of pc-rel P.I.C. (?) */
- RELOC_JMP_TBL, /* P.I.C. jump table */
- RELOC_SEGOFF16, /* reputedly for shared libraries somehow */
- RELOC_GLOB_DAT, RELOC_JMP_SLOT, RELOC_RELATIVE,
- RELOC_11,
- RELOC_WDISP2_14,
- RELOC_WDISP19,
- RELOC_HHI22,
- RELOC_HLO10,
-
- /* 29K relocation types */
- RELOC_JUMPTARG, RELOC_CONST, RELOC_CONSTH,
-
- RELOC_WDISP14, RELOC_WDISP21,
-
- NO_RELOC,
-};
-#endif /* TC_SPARC or TC_A29K */
-
+#define USE_EXTENDED_RELOC defined(TC_SPARC)
+
+#if defined(TC_SPARC)
+enum reloc_type
+ {
+ RELOC_8, RELOC_16, RELOC_32,/* simple relocations */
+ RELOC_DISP8, RELOC_DISP16, RELOC_DISP32, /* pc-rel displacement */
+ RELOC_WDISP30, RELOC_WDISP22,
+ RELOC_HI22, RELOC_22,
+ RELOC_13, RELOC_LO10,
+ RELOC_SFA_BASE, RELOC_SFA_OFF13,
+ RELOC_BASE10, RELOC_BASE13, RELOC_BASE22, /* P.I.C. (base-relative) */
+ RELOC_PC10, RELOC_PC22, /* for some sort of pc-rel P.I.C. (?) */
+ RELOC_JMP_TBL, /* P.I.C. jump table */
+ RELOC_SEGOFF16, /* reputedly for shared libraries somehow */
+ RELOC_GLOB_DAT, RELOC_JMP_SLOT, RELOC_RELATIVE,
+ RELOC_10, RELOC_11,
+ RELOC_WDISP2_14,
+ RELOC_WDISP19,
+ RELOC_HHI22,
+ RELOC_HLO10,
+
+ /* 29K relocation types */
+ RELOC_JUMPTARG, RELOC_CONST, RELOC_CONSTH,
+
+ RELOC_WDISP14, RELOC_WDISP21,
+
+ NO_RELOC
+ };
+
+#endif /* TC_SPARC */
#define __GNU_EXEC_MACROS__
"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];
-};
+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)
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 */
+ 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__ */
#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 */
-};
+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 */
+ M_VAX4K_NETBSD = 150,
+ /* 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))
((exec).a_info&0x00ffffff) | (((flags) & 0xff) << 24))
/* Code indicating object file or impure executable. */
+#ifndef OMAGIC
#define OMAGIC 0407
+#endif
/* Code indicating pure executable. */
#define NMAGIC 0410
/* Code indicating demand-paged executable. */
#ifndef N_SEGSIZE
#define N_SEGSIZE(x) SEGMENT_SIZE
#endif
-
- /* This complexity is for encapsulated COFF support */
+
+/* This complexity is for encapsulated COFF support */
#ifndef _N_HDROFF
#define _N_HDROFF(x) (N_SEGSIZE(x) - sizeof (struct exec))
#endif
sizeof (struct exec))
#endif
-
#ifndef N_DATOFF
#define N_DATOFF(x) ( N_TXTOFF(x) + (x).a_text )
#endif
#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) \
/* 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;
-};
+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
/* 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
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
message is printed. */
#define N_WARNING 0x1e
+
+/* Weak symbols. These are a GNU extension to the a.out format. The
+ semantics are those of ELF weak symbols. Weak symbols are always
+ externally visible. The N_WEAK? values are squeezed into the
+ available slots. The value of a N_WEAKU symbol is 0. The values
+ of the other types are the definitions. */
+#define N_WEAKU 0x0d /* Weak undefined symbol. */
+#define N_WEAKA 0x0e /* Weak absolute symbol. */
+#define N_WEAKT 0x0f /* Weak text symbol. */
+#define N_WEAKD 0x10 /* Weak data symbol. */
+#define N_WEAKB 0x11 /* Weak bss symbol. */
\f
/* This structure describes a single relocation to be performed.
The text-relocation section of the file is a vector of these structures,
/* 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. */
#if USE_EXTENDED_RELOC
-struct reloc_ext_bytes {
- unsigned char r_address[4];
- unsigned char r_index[3];
- unsigned char r_bits[1];
- unsigned char r_addend[4];
-};
-
+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_LITTLE 0xF8
#define RELOC_EXT_BITS_TYPE_SH_LITTLE 3
-#define RELOC_EXT_SIZE 12 /* Bytes per relocation entry */
+#define RELOC_EXT_SIZE 12 /* Bytes per relocation entry */
struct reloc_info_extended
{
- unsigned long r_address;
- unsigned int r_index:24;
+ 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
+ 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;
+ enum reloc_type r_type;
+ long int r_addend;
};
#else
/* The standard, old-fashioned, Berkeley compatible relocation struct */
-
-
#ifdef TC_I860
/* NOTE: three bits max, see struct reloc_info_i860.r_type */
-enum i860_reloc_type {
- NO_RELOC = 0, BRADDR, LOW0, LOW1, LOW2, LOW3, LOW4, SPLIT0, SPLIT1, SPLIT2, RELOC_32,
-};
+enum i860_reloc_type
+ {
+ NO_RELOC = 0, BRADDR, LOW0, LOW1, LOW2, LOW3, LOW4, SPLIT0, SPLIT1, SPLIT2, RELOC_32,
+ };
typedef enum i860_reloc_type reloc_type;
- /* NOTE: two bits max, see reloc_info_i860.r_type */
-enum highlow_type {
- NO_SPEC = 0, PAIR, HIGH, HIGHADJ,
-};
-
+/* NOTE: two bits max, see reloc_info_i860.r_type */
+enum highlow_type
+ {
+ NO_SPEC = 0, PAIR, HIGH, HIGHADJ,
+ };
struct reloc_info_i860
{
- unsigned long r_address;
- /*
+ unsigned long r_address;
+ /*
* Using bit fields here is a bad idea because the order is not portable. :-(
*/
- unsigned int r_symbolnum: 24;
- unsigned int r_pcrel : 1;
- unsigned int r_extern : 1;
- /* combining the two field simplifies the argument passing in "new_fix()" */
- /* and is compatible with the existing Sparc #ifdef's */
- /* r_type: highlow_type - bits 5,4; reloc_type - bits 3-0 */
- unsigned int r_type : 6;
- long r_addend;
+ unsigned int r_symbolnum:24;
+ unsigned int r_pcrel:1;
+ unsigned int r_extern:1;
+ /* combining the two field simplifies the argument passing in "new_fix()" */
+ /* and is compatible with the existing Sparc #ifdef's */
+ /* r_type: highlow_type - bits 5,4; reloc_type - bits 3-0 */
+ unsigned int r_type:6;
+ long r_addend;
};
#endif /* TC_I860 */
-
-struct reloc_std_bytes {
- unsigned char r_address[4];
- unsigned char r_index[3];
- unsigned char r_bits[1];
-};
+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_RELATIVE_BIG 0x02
#define RELOC_STD_BITS_RELATIVE_LITTLE 0x02
-#define RELOC_STD_SIZE 8 /* Bytes per relocation entry */
+#define RELOC_STD_SIZE 8 /* Bytes per relocation entry */
#endif /* USE_EXTENDED_RELOC */
#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
+ /* 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.
+ 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.
+ 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
+ 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
+ unsigned int r_bsr:1;
+ unsigned int r_disp:2;
+#else
+ 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" */
#endif /* TC_NS32K */
-
- unsigned int r_relative:1; /* "relative relocation" */
- /* unused */
- unsigned int r_pad:1; /* Padding -- set to zero */
+ /* unused */
+ unsigned int r_pad:1; /* Padding -- set to zero */
};
+
#endif /* CUSTOM_RELOC_FORMAT */
#endif /* __A_OUT_GNU_H__ */
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