#ifndef __A_OUT_GNU_H__
#define __A_OUT_GNU_H__
-#include "target.h" /* Figure out which target and host systems */
+#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 */
/* these go in the N_MACHTYPE field */
/* These symbols could be defined by code from Suns...punt 'em */
-#undef M_OLDSUN2
+#undef M_UNKNOWN
#undef M_68010
#undef M_68020
#undef M_SPARC
enum machine_type {
- M_OLDSUN2 = 0,
+ M_UNKNOWN = 0,
M_68010 = 1,
M_68020 = 2,
M_SPARC = 3,
/* Code indicating demand-paged executable. */
#define ZMAGIC 0413
-#define N_BADMAG(x) \
- (N_MAGIC(x) != OMAGIC && N_MAGIC(x) != NMAGIC \
- && N_MAGIC(x) != ZMAGIC)
-
-#define _N_BADMAG(x) \
- (N_MAGIC(x) != OMAGIC && N_MAGIC(x) != NMAGIC \
- && N_MAGIC(x) != ZMAGIC)
-
-#define _N_HDROFF(x) (1024 - sizeof (struct exec))
-
-#define N_TXTOFF(x) \
- (N_MAGIC(x) == ZMAGIC ? _N_HDROFF((x)) + sizeof (struct exec) : sizeof (struct exec))
-
-#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)
-
/* Address of text segment in memory after it is loaded. */
/* Don't load things at zero, it encourages zero-pointer bugs */
#ifndef TEXT_START_ADDR
#define TEXT_START_ADDR 0x10000
#endif
-#define N_TXTADDR(x) TEXT_START_ADDR
+
+/* Virtual Address of text segment from the a.out file. For OMAGIC,
+ (almost always "unlinked .o's" these days), should be zero.
+ Sun added a kludge so that shared libraries linked ZMAGIC get
+ an address of zero if a_entry (!!!) is lower than the otherwise
+ expected text address. These kludges have gotta go!
+ For linked files, should reflect reality if we know it. */
+
+#ifndef N_TXTADDR
+#define N_TXTADDR(x) \
+ (N_MAGIC(x)==OMAGIC? 0 \
+ : (N_MAGIC(x) == ZMAGIC && (x).a_entry < TEXT_START_ADDR)? 0 \
+ : TEXT_START_ADDR)
+#endif
/* Address of data segment in memory after it is loaded.
Note that it is up to you to define SEGMENT_SIZE
on machines not listed here. */
-#ifndef SEGMENT_SIZE
-#if defined(vax) || defined(hp300) || defined(pyr)
+#if defined(hp300) || defined(pyr)
#define SEGMENT_SIZE page_size
#endif
#ifdef sony
#define PAGE_SIZE 0x400
#define SEGMENT_SIZE PAGE_SIZE
#endif
-#endif
-
-#define _N_SEGMENT_ROUND(x) (((x) + SEGMENT_SIZE - 1) & ~(SEGMENT_SIZE - 1))
-
-#define _N_TXTENDADDR(x) (N_TXTADDR(x)+(x).a_text)
#ifndef N_DATADDR
#define N_DATADDR(x) \
- (N_MAGIC(x)==OMAGIC? (_N_TXTENDADDR(x)) \
- : (_N_SEGMENT_ROUND (_N_TXTENDADDR(x))))
+ (N_MAGIC(x)==OMAGIC? (N_TXTADDR(x)+(x).a_text) \
+ : (SEGMENT_SIZE + ((N_TXTADDR(x)+(x).a_text-1) & ~(SEGMENT_SIZE-1))))
#endif
/* Address of bss segment in memory after it is loaded. */
all of which apply to the text section.
Likewise, the data-relocation section applies to the data section. */
-#if TARGET == TARGET_SPARC || TARGET == TARGET_AM29K
-/*
- * The following enum and struct were borrowed from
- * sunOS /usr/include/sun4/a.out.h and extended to handle
- * other machines.
- */
-
-enum reloc_type
-{
- RELOC_8, RELOC_16, RELOC_32, RELOC_DISP8,
- RELOC_DISP16, RELOC_DISP32, RELOC_WDISP30, RELOC_WDISP22,
- RELOC_HI22, RELOC_22, RELOC_13, RELOC_LO10,
- RELOC_SFA_BASE, RELOC_SFA_OFF13, RELOC_BASE10, RELOC_BASE13,
- RELOC_BASE22, RELOC_PC10, RELOC_PC22, RELOC_JMP_TBL,
- RELOC_SEGOFF16, RELOC_GLOB_DAT, RELOC_JMP_SLOT, RELOC_RELATIVE,
+/* 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.
-/* 29K relocation types */
- RELOC_JUMPTARG, RELOC_CONST, RELOC_CONSTH,
+ reloc_ext_bytes is how it looks on disk. reloc_info_extended is
+ how we might process it on a native host. */
- NO_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];
};
-#define RELOC_TYPE_NAMES \
-"8", "16", "32", "DISP8", \
-"DISP16", "DISP32", "WDISP30", "WDISP22", \
-"HI22", "22", "13", "LO10", \
-"SFA_BASE", "SFAOFF13", "BASE10", "BASE13", \
-"BASE22", "PC10", "PC22", "JMP_TBL", \
-"SEGOFF16", "GLOB_DAT", "JMP_SLOT", "RELATIVE", \
-"JUMPTARG", "CONST", "CONSTH", \
-"NO_RELOC", \
-"XXX_28", "XXX_29", "XXX_30", "XXX_31"
+#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
{
long int r_addend;
};
-/* Let programs know what they're dealing with */
-#define RELOC_EXTENDED 1
-
-#undef relocation_info
-#define relocation_info reloc_info_extended
-#define RELOC_ADDRESS(r) ((r)->r_address)
-#define RELOC_EXTERN_P(r) ((r)->r_extern)
-#define RELOC_TYPE(r) ((r)->r_index)
-#define RELOC_EXTENDED_TYPE(r) ((r)->r_type)
-#define RELOC_SYMBOL(r) ((r)->r_index)
-#define RELOC_MEMORY_SUB_P(r) 0
-#define RELOC_MEMORY_ADD_P(r) 0
-#define RELOC_ADD_EXTRA(r) ((r)->r_addend)
-#define RELOC_PCREL_P(r) \
- ( ((r)->r_type >= RELOC_DISP8 && (r)->r_type <= RELOC_WDISP22) \
- || (r)->r_type == RELOC_JUMPTARG )
-#define RELOC_VALUE_RIGHTSHIFT(r) (reloc_target_rightshift[(r)->r_type])
-#define RELOC_TARGET_SIZE(r) (reloc_target_size[(r)->r_type])
-#define RELOC_TARGET_BITPOS(r) 0
-#define RELOC_TARGET_BITSIZE(r) (reloc_target_bitsize[(r)->r_type])
-
-/* Note that these are very dependent on the order of the enums in
- enum reloc_type (in a.out.h); if they change the following must be
- changed */
-/* Also note that some of these may be incorrect; I have no information */
-#ifndef __STDC__
-#define const /**/
-#endif
-static const int reloc_target_rightshift[] = {
- 0, 0, 0, 0,
- 0, 0, 2, 2,
- 10, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 2, 0,16, /* 29K jumptarg, const, consth */
- 0,
-};
-#define RELOC_SIZE_SPLIT16 13
-static const int reloc_target_size[] = {
- 0, 1, 2, 0,
- 1, 2, 2, 2,
- 2, 2, 2, 2,
- 2, 2, 2, 2,
- 2, 2, 2, 2,
- 2, 2, 2, 2,
- RELOC_SIZE_SPLIT16, RELOC_SIZE_SPLIT16, RELOC_SIZE_SPLIT16,
- 0,
-};
-static const int reloc_target_bitsize[] = {
- 8, 16, 32, 8,
- 16, 32, 30, 22,
- 22, 22, 13, 10,
- 32, 32, 16, 0,
- 0, 0, 0, 0, /* dunno */
- 0, 0, 0, 0,
- 16, 16, 16, /* 29K jumptarg, const, consth */
- 0,
+/* 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 MAX_ALIGNMENT (sizeof (double))
+#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
-#else /* Not SPARC or AM29K */
+#define RELOC_STD_SIZE 8 /* Bytes per relocation entry */
struct relocation_info
{
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;
- /* Four bits that aren't used, but when writing an object file
- it is desirable to clear them. */
- unsigned int r_pad:4;
-};
-#endif
-
-/*
- * Ok. Following are the relocation information macros. If your
- * system should not be able to use the default set (below), you must
- * define the following:
-
- * relocation_info: This must be typedef'd (or #define'd) to the type
- * of structure that is stored in the relocation info section of your
- * a.out files. Often this is defined in the a.out.h for your system.
- *
- * RELOC_ADDRESS (rval): Offset into the current section of the
- * <whatever> to be relocated. *Must be an lvalue*.
- *
- * RELOC_EXTERN_P (rval): Is this relocation entry based on an
- * external symbol (1), or was it fully resolved upon entering the
- * loader (0) in which case some combination of the value in memory
- * (if RELOC_MEMORY_ADD_P) and the extra (if RELOC_ADD_EXTRA) contains
- * what the value of the relocation actually was. *Must be an lvalue*.
- *
- * RELOC_TYPE (rval): If this entry was fully resolved upon
- * entering the loader, what type should it be relocated as?
- *
- * RELOC_EXTENDED_TYPE (rval): If this entry is for a machine using
- * extended relocatino, what type of field is it? (For example, on RISC
- * machines, odd-sized displacements or split displacements occur.)
- *
- * RELOC_SYMBOL (rval): If this entry was not fully resolved upon
- * entering the loader, what is the index of it's symbol in the symbol
- * table? *Must be a lvalue*.
- *
- * RELOC_MEMORY_ADD_P (rval): This should return true if the final
- * relocation value output here should be added to memory, or if the
- * section of memory described should simply be set to the relocation
- * value.
- *
- * RELOC_ADD_EXTRA (rval): (Optional) This macro, if defined, gives
- * an extra value to be added to the relocation value based on the
- * individual relocation entry. *Must be an lvalue if defined*.
- *
- * RELOC_PCREL_P (rval): True if the relocation value described is
- * pc relative.
- *
- * RELOC_VALUE_RIGHTSHIFT (rval): Number of bits right to shift the
- * final relocation value before putting it where it belongs.
- *
- * RELOC_TARGET_SIZE (rval): log to the base 2 of the number of
- * bytes of size this relocation entry describes; 1 byte == 0; 2 bytes
- * == 1; 4 bytes == 2, and etc. This is somewhat redundant (we could
- * do everything in terms of the bit operators below), but having this
- * macro could end up producing better code on machines without fancy
- * bit twiddling. Also, it's easier to understand/code big/little
- * endian distinctions with this macro.
- *
- * RELOC_TARGET_BITPOS (rval): The starting bit position within the
- * object described in RELOC_TARGET_SIZE in which the relocation value
- * will go.
- *
- * RELOC_TARGET_BITSIZE (rval): How many bits are to be replaced
- * with the bits of the relocation value. It may be assumed by the
- * code that the relocation value will fit into this many bits. This
- * may be larger than RELOC_TARGET_SIZE if such be useful.
- *
- *
- * Things I haven't implemented
- * ----------------------------
- *
- * Values for RELOC_TARGET_SIZE other than 0, 1, or 2.
- *
- * Pc relative relocation for External references.
- */
-#if TARGET == TARGET_SEQUENT
-#define RELOC_ADDRESS(r) ((r)->r_address)
-#define RELOC_EXTERN_P(r) ((r)->r_extern)
-#define RELOC_TYPE(r) ((r)->r_symbolnum)
-#define RELOC_SYMBOL(r) ((r)->r_symbolnum)
-#define RELOC_MEMORY_SUB_P(r) ((r)->r_bsr)
-#define RELOC_MEMORY_ADD_P(r) 1
-#undef RELOC_ADD_EXTRA
-#define RELOC_PCREL_P(r) ((r)->r_pcrel || (r)->r_bsr)
-#define RELOC_VALUE_RIGHTSHIFT(r) 0
-#define RELOC_TARGET_SIZE(r) ((r)->r_length)
-#define RELOC_TARGET_BITPOS(r) 0
-#define RELOC_TARGET_BITSIZE(r) 32
-#endif
-
-/* Default macros */
-#ifndef RELOC_ADDRESS
-#define RELOC_ADDRESS(r) ((r)->r_address)
-#define RELOC_EXTERN_P(r) ((r)->r_extern)
-#define RELOC_TYPE(r) ((r)->r_symbolnum)
-#define RELOC_SYMBOL(r) ((r)->r_symbolnum)
-#define RELOC_MEMORY_SUB_P(r) 0
-#define RELOC_MEMORY_ADD_P(r) 1
-#undef RELOC_ADD_EXTRA
-#define RELOC_PCREL_P(r) ((r)->r_pcrel)
-#define RELOC_VALUE_RIGHTSHIFT(r) 0
-#define RELOC_TARGET_SIZE(r) ((r)->r_length)
-#define RELOC_TARGET_BITPOS(r) 0
-#define RELOC_TARGET_BITSIZE(r) 32
-#endif
-
-/* Maximum alignment required of a common'd variable. If a var of this
- size or larger is allocated in BSS when nobody defines it, it gets
- this alignment. */
-
-#ifndef MAX_ALIGNMENT
-#define MAX_ALIGNMENT (sizeof (int))
-#endif
-
-
-/* Definitions for routines that read and write GNU a.out files */
-
-enum objfile_kind {
- OBJFILE_ERROR,
- OBJFILE_UNKNOWN,
- OBJFILE_SINGLE,
- OBJFILE_ARCHIVE,
+ /* 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 */
};
-enum objfile_kind read_aout_header(); /* (desc, &header) read&swap header */
-
-/* Read an a.out header from DESC and call rel_fn(DESC, header)
- if it is an object file, lib_fn(DESC) if it is a library, else
- call err_fn("msg") */
-void handle_aout_header(); /* (desc, rel_fn, lib_fn, err_fn) */
-
-/* Byte-swapping definitions */
-
-void swap_aoutheader(); /* BSD a.out header */
-short swap_getshort ();
-void swap_putshort();
-long swap_getlong ();
-void swap_putlong();
-void swap_reloc_info_in(); /* BSD relocation information */
-void swap_reloc_info_out(); /* BSD relocation information */
-void swap_nlists(); /* BSD symbol name lists */
-void swap_root_updates(); /* GDB Symseg */
-
-/* Bring on the encapsulation, if configured in! */
-#ifdef COFF_ENCAPSULATE
-#include "a.out.encap.h"
-#endif
-
#endif /* __A_OUT_GNU_H__ */
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