Warn if GOT16 overflows.

[deliverable/binutils-gdb.git] / bfd / bfd-in.h

/* Main header file for the bfd library -- portable access to object files.
   Copyright 1990, 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
   Contributed by Cygnus Support.

** NOTE: bfd.h and bfd-in2.h are GENERATED files.  Don't change them;
** instead, change bfd-in.h or the other BFD source files processed to
** generate these files.

This file is part of BFD, the Binary File Descriptor library.

This program 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 of the License, or
(at your option) any later version.

This program 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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */

/* bfd.h -- The only header file required by users of the bfd library 

The bfd.h file is generated from bfd-in.h and various .c files; if you
change it, your changes will probably be lost.

All the prototypes and definitions following the comment "THE FOLLOWING
IS EXTRACTED FROM THE SOURCE" are extracted from the source files for
BFD.  If you change it, someone oneday will extract it from the source
again, and your changes will be lost.  To save yourself from this bind,
change the definitions in the source in the bfd directory.  Type "make
docs" and then "make headers" in that directory, and magically this file
will change to reflect your changes.

If you don't have the tools to perform the extraction, then you are
safe from someone on your system trampling over your header files.
You should still maintain the equivalence between the source and this
file though; every change you make to the .c file should be reflected
here.  */

#ifndef __BFD_H_SEEN__
#define __BFD_H_SEEN__

#include "ansidecl.h"
#include "obstack.h"

/* These two lines get substitutions done by commands in Makefile.in.  */
#define BFD_VERSION   "@VERSION@"
#define BFD_ARCH_SIZE @WORDSIZE@

#if BFD_ARCH_SIZE >= 64
#define BFD64
#endif

#ifndef INLINE
#if __GNUC__ >= 2
#define INLINE __inline__
#else
#define INLINE
#endif
#endif

/* 64-bit type definition (if any) from bfd's sysdep.h goes here */


/* forward declaration */
typedef struct _bfd bfd;

/* To squelch erroneous compiler warnings ("illegal pointer
   combination") from the SVR3 compiler, we would like to typedef
   boolean to int (it doesn't like functions which return boolean.
   Making sure they are never implicitly declared to return int
   doesn't seem to help).  But this file is not configured based on
   the host.  */
/* General rules: functions which are boolean return true on success
   and false on failure (unless they're a predicate).   -- bfd.doc */
/* I'm sure this is going to break something and someone is going to
   force me to change it. */
/* typedef enum boolean {false, true} boolean; */
/* Yup, SVR4 has a "typedef enum boolean" in <sys/types.h>  -fnf */
/* It gets worse if the host also defines a true/false enum... -sts */
#ifndef TRUE_FALSE_ALREADY_DEFINED
typedef enum bfd_boolean {false, true} boolean;
#define BFD_TRUE_FALSE
#else
typedef enum bfd_boolean {bfd_false, bfd_true} boolean;
#endif

/* A pointer to a position in a file.  */
/* FIXME:  This should be using off_t from <sys/types.h>.
   For now, try to avoid breaking stuff by not including <sys/types.h> here.
   This will break on systems with 64-bit file offsets (e.g. 4.4BSD).
   Probably the best long-term answer is to avoid using file_ptr AND off_t 
   in this header file, and to handle this in the BFD implementation
   rather than in its interface.  */
/* typedef off_t	file_ptr; */
typedef long int file_ptr;

/* Support for different sizes of target format ints and addresses.  If the
   host implements 64-bit values, it defines BFD_HOST_64_BIT to be the appropriate
   type.  Otherwise, this code will fall back on gcc's "long long" type if gcc
   is being used.  BFD_HOST_64_BIT must be defined in such a way as to be a valid
   type name by itself or with "unsigned" prefixed.  It should be a signed
   type by itself.

   If neither is the case, then compilation will fail if 64-bit targets are
   requested.  If you don't request any 64-bit targets, you should be safe. */

#ifdef	BFD64

#if defined (__GNUC__) && !defined (BFD_HOST_64_BIT)
#define BFD_HOST_64_BIT long long
typedef BFD_HOST_64_BIT int64_type;
typedef unsigned BFD_HOST_64_BIT uint64_type;
#endif

#if !defined (uint64_type) && defined (__GNUC__)
#define uint64_type unsigned long long
#define int64_type long long
#endif
#ifndef uint64_typeLOW
#define uint64_typeLOW(x) ((unsigned long)(((x) & 0xffffffff)))
#define uint64_typeHIGH(x) ((unsigned long)(((x) >> 32) & 0xffffffff))
#endif

typedef unsigned BFD_HOST_64_BIT bfd_vma;
typedef BFD_HOST_64_BIT bfd_signed_vma;
typedef unsigned BFD_HOST_64_BIT bfd_size_type;
typedef unsigned BFD_HOST_64_BIT symvalue;
#ifndef fprintf_vma
#define fprintf_vma(s,x) \
		fprintf(s,"%08lx%08lx", uint64_typeHIGH(x), uint64_typeLOW(x))
#define sprintf_vma(s,x) \
		sprintf(s,"%08lx%08lx", uint64_typeHIGH(x), uint64_typeLOW(x))
#endif
#else /* not BFD64  */

/* Represent a target address.  Also used as a generic unsigned type
   which is guaranteed to be big enough to hold any arithmetic types
   we need to deal with.  */
typedef unsigned long bfd_vma;

/* A generic signed type which is guaranteed to be big enough to hold any
   arithmetic types we need to deal with.  Can be assumed to be compatible
   with bfd_vma in the same way that signed and unsigned ints are compatible
   (as parameters, in assignment, etc).  */
typedef long bfd_signed_vma;

typedef unsigned long symvalue;
typedef unsigned long bfd_size_type;

/* Print a bfd_vma x on stream s.  */
#define fprintf_vma(s,x) fprintf(s, "%08lx", x)
#define sprintf_vma(s,x) sprintf(s, "%08lx", x)
#endif /* not BFD64  */
#define printf_vma(x) fprintf_vma(stdout,x)

typedef unsigned int flagword;	/* 32 bits of flags */
\f
/** File formats */

typedef enum bfd_format {
	      bfd_unknown = 0,	/* file format is unknown */
	      bfd_object,	/* linker/assember/compiler output */
	      bfd_archive,	/* object archive file */
	      bfd_core,		/* core dump */
	      bfd_type_end}	/* marks the end; don't use it! */
         bfd_format;

/* Values that may appear in the flags field of a BFD.  These also
   appear in the object_flags field of the bfd_target structure, where
   they indicate the set of flags used by that backend (not all flags
   are meaningful for all object file formats) (FIXME: at the moment,
   the object_flags values have mostly just been copied from backend
   to another, and are not necessarily correct).  */

/* No flags.  */
#define NO_FLAGS    	0x00

/* BFD contains relocation entries.  */
#define HAS_RELOC   	0x01

/* BFD is directly executable.  */
#define EXEC_P      	0x02

/* BFD has line number information (basically used for F_LNNO in a
   COFF header).  */
#define HAS_LINENO  	0x04

/* BFD has debugging information.  */
#define HAS_DEBUG   	0x08

/* BFD has symbols.  */
#define HAS_SYMS    	0x10

/* BFD has local symbols (basically used for F_LSYMS in a COFF
   header).  */
#define HAS_LOCALS  	0x20

/* BFD is a dynamic object.  */
#define DYNAMIC     	0x40

/* Text section is write protected (if D_PAGED is not set, this is
   like an a.out NMAGIC file) (the linker sets this by default, but
   clears it for -r or -N).  */
#define WP_TEXT     	0x80

/* BFD is dynamically paged (this is like an a.out ZMAGIC file) (the
   linker sets this by default, but clears it for -r or -n or -N).  */
#define D_PAGED     	0x100

/* BFD is relaxable (this means that bfd_relax_section may be able to
   do something).  */
#define BFD_IS_RELAXABLE 0x200

/* This may be set before writing out a BFD to request using a
   traditional format.  For example, this is used to request that when
   writing out an a.out object the symbols not be hashed to eliminate
   duplicates.  */
#define BFD_TRADITIONAL_FORMAT 0x400
\f
/* symbols and relocation */

/* A count of carsyms (canonical archive symbols).  */
typedef unsigned long symindex;

#define BFD_NO_MORE_SYMBOLS ((symindex) ~0)

/* General purpose part of a symbol X;
   target specific parts are in libcoff.h, libaout.h, etc.  */

#define bfd_get_section(x) ((x)->section)
#define bfd_get_output_section(x) ((x)->section->output_section)
#define bfd_set_section(x,y) ((x)->section) = (y)
#define bfd_asymbol_base(x) ((x)->section->vma)
#define bfd_asymbol_value(x) (bfd_asymbol_base(x) + (x)->value)
#define bfd_asymbol_name(x) ((x)->name)
/*Perhaps future: #define bfd_asymbol_bfd(x) ((x)->section->owner)*/
#define bfd_asymbol_bfd(x) ((x)->the_bfd)
#define bfd_asymbol_flavour(x) (bfd_asymbol_bfd(x)->xvec->flavour)

/* A canonical archive symbol.  */
/* This is a type pun with struct ranlib on purpose! */
typedef struct carsym {
  char *name;
  file_ptr file_offset;		/* look here to find the file */
} carsym;			/* to make these you call a carsymogen */

  
/* Used in generating armaps (archive tables of contents).
   Perhaps just a forward definition would do? */
struct orl {			/* output ranlib */
  char **name;			/* symbol name */ 
  file_ptr pos;			/* bfd* or file position */
  int namidx;			/* index into string table */
};

\f

/* Linenumber stuff */
typedef struct lineno_cache_entry {
  unsigned int line_number;	/* Linenumber from start of function*/  
  union {
    struct symbol_cache_entry *sym; /* Function name */
    unsigned long offset;	/* Offset into section */
  } u;
} alent;
\f
/* object and core file sections */


#define	align_power(addr, align)	\
	( ((addr) + ((1<<(align))-1)) & (-1 << (align)))

typedef struct sec *sec_ptr;

#define bfd_get_section_name(bfd, ptr) ((ptr)->name + 0)
#define bfd_get_section_vma(bfd, ptr) ((ptr)->vma + 0)
#define bfd_get_section_alignment(bfd, ptr) ((ptr)->alignment_power + 0)
#define bfd_section_name(bfd, ptr) ((ptr)->name)
#define bfd_section_size(bfd, ptr) (bfd_get_section_size_before_reloc(ptr))
#define bfd_section_vma(bfd, ptr) ((ptr)->vma)
#define bfd_section_alignment(bfd, ptr) ((ptr)->alignment_power)
#define bfd_get_section_flags(bfd, ptr) ((ptr)->flags + 0)
#define bfd_get_section_userdata(bfd, ptr) ((ptr)->userdata)

#define bfd_is_com_section(ptr) (((ptr)->flags & SEC_IS_COMMON) != 0)

#define bfd_set_section_vma(bfd, ptr, val) (((ptr)->vma = (ptr)->lma= (val)), ((ptr)->user_set_vma = true), true)
#define bfd_set_section_alignment(bfd, ptr, val) (((ptr)->alignment_power = (val)),true)
#define bfd_set_section_userdata(bfd, ptr, val) (((ptr)->userdata = (val)),true)

typedef struct stat stat_type; 
\f
typedef enum bfd_print_symbol
{ 
  bfd_print_symbol_name,
  bfd_print_symbol_more,
  bfd_print_symbol_all
} bfd_print_symbol_type;
    
/* Information about a symbol that nm needs.  */

typedef struct _symbol_info
{
  symvalue value;
  char type;
  CONST char *name;            /* Symbol name.  */
  char stab_other;             /* Unused. */
  short stab_desc;             /* Info for N_TYPE.  */
  CONST char *stab_name;
} symbol_info;
\f
/* Hash table routines.  There is no way to free up a hash table.  */

/* An element in the hash table.  Most uses will actually use a larger
   structure, and an instance of this will be the first field.  */

struct bfd_hash_entry
{
  /* Next entry for this hash code.  */
  struct bfd_hash_entry *next;
  /* String being hashed.  */
  const char *string;
  /* Hash code.  This is the full hash code, not the index into the
     table.  */
  unsigned long hash;
};

/* A hash table.  */

struct bfd_hash_table
{
  /* The hash array.  */
  struct bfd_hash_entry **table;
  /* The number of slots in the hash table.  */
  unsigned int size;
  /* A function used to create new elements in the hash table.  The
     first entry is itself a pointer to an element.  When this
     function is first invoked, this pointer will be NULL.  However,
     having the pointer permits a hierarchy of method functions to be
     built each of which calls the function in the superclass.  Thus
     each function should be written to allocate a new block of memory
     only if the argument is NULL.  */
  struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *,
					     struct bfd_hash_table *,
					     const char *));
  /* An obstack for this hash table.  */
  struct obstack memory;
};

/* Initialize a hash table.  */
extern boolean bfd_hash_table_init
  PARAMS ((struct bfd_hash_table *,
	   struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
				       struct bfd_hash_table *,
				       const char *)));

/* Initialize a hash table specifying a size.  */
extern boolean bfd_hash_table_init_n
  PARAMS ((struct bfd_hash_table *,
	   struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
				       struct bfd_hash_table *,
				       const char *),
	   unsigned int size));

/* Free up a hash table.  */
extern void bfd_hash_table_free PARAMS ((struct bfd_hash_table *));

/* Look up a string in a hash table.  If CREATE is true, a new entry
   will be created for this string if one does not already exist.  The
   COPY argument must be true if this routine should copy the string
   into newly allocated memory when adding an entry.  */
extern struct bfd_hash_entry *bfd_hash_lookup
  PARAMS ((struct bfd_hash_table *, const char *, boolean create,
	   boolean copy));

/* Base method for creating a hash table entry.  */
extern struct bfd_hash_entry *bfd_hash_newfunc
  PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *,
	   const char *));

/* Grab some space for a hash table entry.  */
extern PTR bfd_hash_allocate PARAMS ((struct bfd_hash_table *,
				      unsigned int));

/* Traverse a hash table in a random order, calling a function on each
   element.  If the function returns false, the traversal stops.  The
   INFO argument is passed to the function.  */
extern void bfd_hash_traverse PARAMS ((struct bfd_hash_table *,
				       boolean (*) (struct bfd_hash_entry *,
						    PTR),
				       PTR info));
\f
/* Semi-portable string concatenation in cpp.
   The CAT4 hack is to avoid a problem with some strict ANSI C preprocessors.
   The problem is, "32_" is not a valid preprocessing token, and we don't
   want extra underscores (e.g., "nlm_32_").  The XCAT2 macro will cause the
   inner CAT macros to be evaluated first, producing still-valid pp-tokens.
   Then the final concatenation can be done.  (Sigh.)  */
#ifndef CAT
#ifdef SABER
#define CAT(a,b)	a##b
#define CAT3(a,b,c)	a##b##c
#define CAT4(a,b,c,d)	a##b##c##d
#else
#if defined(__STDC__) || defined(ALMOST_STDC)
#define CAT(a,b) a##b
#define CAT3(a,b,c) a##b##c
#define XCAT2(a,b)	CAT(a,b)
#define CAT4(a,b,c,d)	XCAT2(CAT(a,b),CAT(c,d))
#else
#define CAT(a,b) a/**/b
#define CAT3(a,b,c) a/**/b/**/c
#define CAT4(a,b,c,d)	a/**/b/**/c/**/d
#endif
#endif
#endif

#define COFF_SWAP_TABLE (PTR) &bfd_coff_std_swap_table
\f
/* User program access to BFD facilities */

/* Cast from const char * to char * so that caller can assign to
   a char * without a warning.  */
#define bfd_get_filename(abfd) ((char *) (abfd)->filename)
#define bfd_get_cacheable(abfd) ((abfd)->cacheable)
#define bfd_get_format(abfd) ((abfd)->format)
#define bfd_get_target(abfd) ((abfd)->xvec->name)
#define bfd_get_flavour(abfd) ((abfd)->xvec->flavour)
#define bfd_get_file_flags(abfd) ((abfd)->flags)
#define bfd_applicable_file_flags(abfd) ((abfd)->xvec->object_flags)
#define bfd_applicable_section_flags(abfd) ((abfd)->xvec->section_flags)
#define bfd_my_archive(abfd) ((abfd)->my_archive)
#define bfd_has_map(abfd) ((abfd)->has_armap)

#define bfd_valid_reloc_types(abfd) ((abfd)->xvec->valid_reloc_types)
#define bfd_usrdata(abfd) ((abfd)->usrdata)

#define bfd_get_start_address(abfd) ((abfd)->start_address)
#define bfd_get_symcount(abfd) ((abfd)->symcount)
#define bfd_get_outsymbols(abfd) ((abfd)->outsymbols)
#define bfd_count_sections(abfd) ((abfd)->section_count)

#define bfd_get_symbol_leading_char(abfd) ((abfd)->xvec->symbol_leading_char)

#define bfd_set_cacheable(abfd,bool) (((abfd)->cacheable = (bool)), true)

/* Byte swapping routines.  */

bfd_vma		bfd_getb64	   PARAMS ((const unsigned char *));
bfd_vma 	bfd_getl64	   PARAMS ((const unsigned char *));
bfd_signed_vma	bfd_getb_signed_64 PARAMS ((const unsigned char *));
bfd_signed_vma	bfd_getl_signed_64 PARAMS ((const unsigned char *));
bfd_vma		bfd_getb32	   PARAMS ((const unsigned char *));
bfd_vma		bfd_getl32	   PARAMS ((const unsigned char *));
bfd_signed_vma	bfd_getb_signed_32 PARAMS ((const unsigned char *));
bfd_signed_vma	bfd_getl_signed_32 PARAMS ((const unsigned char *));
bfd_vma		bfd_getb16	   PARAMS ((const unsigned char *));
bfd_vma		bfd_getl16	   PARAMS ((const unsigned char *));
bfd_signed_vma	bfd_getb_signed_16 PARAMS ((const unsigned char *));
bfd_signed_vma	bfd_getl_signed_16 PARAMS ((const unsigned char *));
void		bfd_putb64	   PARAMS ((bfd_vma, unsigned char *));
void		bfd_putl64	   PARAMS ((bfd_vma, unsigned char *));
void		bfd_putb32	   PARAMS ((bfd_vma, unsigned char *));
void		bfd_putl32	   PARAMS ((bfd_vma, unsigned char *));
void		bfd_putb16	   PARAMS ((bfd_vma, unsigned char *));
void		bfd_putl16	   PARAMS ((bfd_vma, unsigned char *));
\f
/* Externally visible ECOFF routines.  */

#if defined(__STDC__) || defined(ALMOST_STDC)
struct ecoff_debug_info;
struct ecoff_debug_swap;
struct ecoff_extr;
struct symbol_cache_entry;
struct bfd_link_info;
#endif
extern bfd_vma bfd_ecoff_get_gp_value PARAMS ((bfd * abfd));
extern boolean bfd_ecoff_set_gp_value PARAMS ((bfd *abfd, bfd_vma gp_value));
extern boolean bfd_ecoff_set_regmasks
  PARAMS ((bfd *abfd, unsigned long gprmask, unsigned long fprmask,
	   unsigned long *cprmask));
extern PTR bfd_ecoff_debug_init
  PARAMS ((bfd *output_bfd, struct ecoff_debug_info *output_debug,
	   const struct ecoff_debug_swap *output_swap,
	   struct bfd_link_info *));
extern void bfd_ecoff_debug_free
  PARAMS ((PTR handle, bfd *output_bfd, struct ecoff_debug_info *output_debug,
	   const struct ecoff_debug_swap *output_swap,
	   struct bfd_link_info *));
extern boolean bfd_ecoff_debug_accumulate
  PARAMS ((PTR handle, bfd *output_bfd, struct ecoff_debug_info *output_debug,
	   const struct ecoff_debug_swap *output_swap,
	   bfd *input_bfd, struct ecoff_debug_info *input_debug,
	   const struct ecoff_debug_swap *input_swap,
	   struct bfd_link_info *));
extern boolean bfd_ecoff_debug_accumulate_other
  PARAMS ((PTR handle, bfd *output_bfd, struct ecoff_debug_info *output_debug,
	   const struct ecoff_debug_swap *output_swap, bfd *input_bfd,
	   struct bfd_link_info *));
extern boolean bfd_ecoff_debug_externals
  PARAMS ((bfd *abfd, struct ecoff_debug_info *debug,
	   const struct ecoff_debug_swap *swap,
	   boolean relocateable,
	   boolean (*get_extr) (struct symbol_cache_entry *,
				struct ecoff_extr *),
	   void (*set_index) (struct symbol_cache_entry *,
			      bfd_size_type)));
extern boolean bfd_ecoff_debug_one_external
  PARAMS ((bfd *abfd, struct ecoff_debug_info *debug,
	   const struct ecoff_debug_swap *swap,
	   const char *name, struct ecoff_extr *esym));
extern bfd_size_type bfd_ecoff_debug_size
  PARAMS ((bfd *abfd, struct ecoff_debug_info *debug,
	   const struct ecoff_debug_swap *swap));
extern boolean bfd_ecoff_write_debug
  PARAMS ((bfd *abfd, struct ecoff_debug_info *debug,
	   const struct ecoff_debug_swap *swap, file_ptr where));
extern boolean bfd_ecoff_write_accumulated_debug
  PARAMS ((PTR handle, bfd *abfd, struct ecoff_debug_info *debug,
	   const struct ecoff_debug_swap *swap,
	   struct bfd_link_info *info, file_ptr where));

/* Externally visible ELF routines.  */

extern boolean bfd_elf32_record_link_assignment
  PARAMS ((bfd *, struct bfd_link_info *, const char *));
extern boolean bfd_elf64_record_link_assignment
  PARAMS ((bfd *, struct bfd_link_info *, const char *));
extern boolean bfd_elf32_size_dynamic_sections
  PARAMS ((bfd *, struct bfd_link_info *, struct sec **));
extern boolean bfd_elf64_size_dynamic_sections
  PARAMS ((bfd *, struct bfd_link_info *, struct sec **));
extern void bfd_elf_set_dt_needed_name PARAMS ((bfd *, const char *));

/* SunOS shared library support routines for the linker.  */

extern boolean bfd_sunos_record_link_assignment
  PARAMS ((bfd *, struct bfd_link_info *, const char *));
extern boolean bfd_sunos_size_dynamic_sections
  PARAMS ((bfd *, struct bfd_link_info *, struct sec **, struct sec **,
	   struct sec **));

/* And more from the source.  */