-/* Copyright (C) 1990, 1991 Free Software Foundation, Inc.
+/* Assorted BFD support routines, only used internally.
+ Copyright 1990, 91, 92, 93, 94, 95, 96, 97, 98, 1999
+ Free Software Foundation, Inc.
+ Written by Cygnus Support.
-This file is part of BFD, the Binary File Diddler.
+This file is part of BFD, the Binary File Descriptor library.
-BFD is free software; you can redistribute it and/or modify
+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 1, or (at your option)
-any later version.
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
-BFD is distributed in the hope that it will be useful,
+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 BFD; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-/* $Id$ */
-
-/*** libbfd.c -- random bfd support routines used internally only. */
-#include "sysdep.h"
#include "bfd.h"
+#include "sysdep.h"
#include "libbfd.h"
+#ifndef HAVE_GETPAGESIZE
+#define getpagesize() 2048
+#endif
-\f
-/** Dummies for targets that don't want or need to implement
- certain operations */
+static int real_read PARAMS ((PTR, size_t, size_t, FILE *));
-boolean
-_bfd_dummy_new_section_hook (ignore, ignore_newsect)
- bfd *ignore;
- asection *ignore_newsect;
-{
- return true;
-}
+/*
+SECTION
+ Internal functions
+DESCRIPTION
+ These routines are used within BFD.
+ They are not intended for export, but are documented here for
+ completeness.
+*/
+
+/* A routine which is used in target vectors for unsupported
+ operations. */
+
+/*ARGSUSED*/
boolean
bfd_false (ignore)
- bfd *ignore;
+ bfd *ignore ATTRIBUTE_UNUSED;
{
+ bfd_set_error (bfd_error_invalid_operation);
return false;
}
+/* A routine which is used in target vectors for supported operations
+ which do not actually do anything. */
+
+/*ARGSUSED*/
boolean
bfd_true (ignore)
- bfd *ignore;
+ bfd *ignore ATTRIBUTE_UNUSED;
{
return true;
}
-void *
-bfd_nullvoidptr(ignore)
-bfd *ignore;
+/* A routine which is used in target vectors for unsupported
+ operations which return a pointer value. */
+
+/*ARGSUSED*/
+PTR
+bfd_nullvoidptr (ignore)
+ bfd *ignore ATTRIBUTE_UNUSED;
{
- return (void *)NULL;
+ bfd_set_error (bfd_error_invalid_operation);
+ return NULL;
}
+/*ARGSUSED*/
int
-bfd_0(ignore)
-bfd *ignore;
+bfd_0 (ignore)
+ bfd *ignore ATTRIBUTE_UNUSED;
{
return 0;
}
+/*ARGSUSED*/
unsigned int
-bfd_0u(ignore)
-bfd *ignore;
+bfd_0u (ignore)
+ bfd *ignore ATTRIBUTE_UNUSED;
{
return 0;
}
+/*ARGUSED*/
+long
+bfd_0l (ignore)
+ bfd *ignore ATTRIBUTE_UNUSED;
+{
+ return 0;
+}
+
+/* A routine which is used in target vectors for unsupported
+ operations which return -1 on error. */
+
+/*ARGSUSED*/
+long
+_bfd_n1 (ignore_abfd)
+ bfd *ignore_abfd ATTRIBUTE_UNUSED;
+{
+ bfd_set_error (bfd_error_invalid_operation);
+ return -1;
+}
+
+/*ARGSUSED*/
void
-bfd_void(ignore)
-bfd *ignore;
+bfd_void (ignore)
+ bfd *ignore ATTRIBUTE_UNUSED;
{
}
+/*ARGSUSED*/
boolean
-_bfd_dummy_core_file_matches_executable_p (ignore_core_bfd, ignore_exec_bfd)
- bfd *ignore_core_bfd;
-bfd *ignore_exec_bfd;
+_bfd_nocore_core_file_matches_executable_p (ignore_core_bfd, ignore_exec_bfd)
+ bfd *ignore_core_bfd ATTRIBUTE_UNUSED;
+ bfd *ignore_exec_bfd ATTRIBUTE_UNUSED;
{
- bfd_error = invalid_operation;
+ bfd_set_error (bfd_error_invalid_operation);
return false;
}
-/* of course you can't initialize a function to be the same as another, grr */
+/* Routine to handle core_file_failing_command entry point for targets
+ without core file support. */
+/*ARGSUSED*/
char *
-_bfd_dummy_core_file_failing_command (ignore_abfd)
- bfd *ignore_abfd;
+_bfd_nocore_core_file_failing_command (ignore_abfd)
+ bfd *ignore_abfd ATTRIBUTE_UNUSED;
{
+ bfd_set_error (bfd_error_invalid_operation);
return (char *)NULL;
}
+/* Routine to handle core_file_failing_signal entry point for targets
+ without core file support. */
+
+/*ARGSUSED*/
int
-_bfd_dummy_core_file_failing_signal (ignore_abfd)
- bfd *ignore_abfd;
+_bfd_nocore_core_file_failing_signal (ignore_abfd)
+ bfd *ignore_abfd ATTRIBUTE_UNUSED;
{
+ bfd_set_error (bfd_error_invalid_operation);
return 0;
}
-bfd_target *
+/*ARGSUSED*/
+const bfd_target *
_bfd_dummy_target (ignore_abfd)
- bfd *ignore_abfd;
+ bfd *ignore_abfd ATTRIBUTE_UNUSED;
{
+ bfd_set_error (bfd_error_wrong_format);
return 0;
}
\f
-/** zalloc -- allocate and clear storage */
+/* Allocate memory using malloc. */
+PTR
+bfd_malloc (size)
+ size_t size;
+{
+ PTR ptr;
-#ifndef zalloc
-char *
-zalloc (size)
- bfd_size_type size;
+ ptr = (PTR) malloc (size);
+ if (ptr == NULL && size != 0)
+ bfd_set_error (bfd_error_no_memory);
+ return ptr;
+}
+
+/* Reallocate memory using realloc. */
+
+PTR
+bfd_realloc (ptr, size)
+ PTR ptr;
+ size_t size;
{
- char *ptr = (char *) malloc (size);
+ PTR ret;
- if ((ptr != NULL) && (size != 0))
- memset(ptr,0, size);
+ if (ptr == NULL)
+ ret = malloc (size);
+ else
+ ret = realloc (ptr, size);
+
+ if (ret == NULL)
+ bfd_set_error (bfd_error_no_memory);
+
+ return ret;
+}
+
+/* Allocate memory using malloc and clear it. */
+
+PTR
+bfd_zmalloc (size)
+ size_t size;
+{
+ PTR ptr;
+
+ ptr = (PTR) malloc (size);
+
+ if (size != 0)
+ {
+ if (ptr == NULL)
+ bfd_set_error (bfd_error_no_memory);
+ else
+ memset (ptr, 0, size);
+ }
return ptr;
}
-#endif
\f
/* Some IO code */
/* Note that archive entries don't have streams; they share their parent's.
- This allows someone to play with the iostream behind bfd's back.
+ This allows someone to play with the iostream behind BFD's back.
Also, note that the origin pointer points to the beginning of a file's
contents (0 for non-archive elements). For archive entries this is the
first octet in the file, NOT the beginning of the archive header. */
+static int
+real_read (where, a,b, file)
+ PTR where;
+ size_t a;
+ size_t b;
+ FILE *file;
+{
+ /* FIXME - this looks like an optimization, but it's really to cover
+ up for a feature of some OSs (not solaris - sigh) that
+ ld/pe-dll.c takes advantage of (apparently) when it creates BFDs
+ internally and tries to link against them. BFD seems to be smart
+ enough to realize there are no symbol records in the "file" that
+ doesn't exist but attempts to read them anyway. On Solaris,
+ attempting to read zero bytes from a NULL file results in a core
+ dump, but on other platforms it just returns zero bytes read.
+ This makes it to something reasonable. - DJ */
+ if (a == 0 || b == 0)
+ return 0;
+
+#if defined (__VAX) && defined (VMS)
+ /* Apparently fread on Vax VMS does not keep the record length
+ information. */
+ return read (fileno (file), where, a * b);
+#else
+ return fread (where, a, b, file);
+#endif
+}
+
+/* Return value is amount read (FIXME: how are errors and end of file dealt
+ with? We never call bfd_set_error, which is probably a mistake). */
+
bfd_size_type
bfd_read (ptr, size, nitems, abfd)
PTR ptr;
bfd_size_type nitems;
bfd *abfd;
{
- return fread (ptr, 1, size*nitems, bfd_cache_lookup(abfd));
+ int nread;
+
+ if ((abfd->flags & BFD_IN_MEMORY) != 0)
+ {
+ struct bfd_in_memory *bim;
+ bfd_size_type get;
+
+ bim = (struct bfd_in_memory *) abfd->iostream;
+ get = size * nitems;
+ if (abfd->where + get > bim->size)
+ {
+ if (bim->size < abfd->where)
+ get = 0;
+ else
+ get = bim->size - abfd->where;
+ bfd_set_error (bfd_error_file_truncated);
+ }
+ memcpy (ptr, bim->buffer + abfd->where, get);
+ abfd->where += get;
+ return get;
+ }
+
+ nread = real_read (ptr, 1, (size_t)(size*nitems), bfd_cache_lookup(abfd));
+ if (nread > 0)
+ abfd->where += nread;
+
+ /* Set bfd_error if we did not read as much data as we expected.
+
+ If the read failed due to an error set the bfd_error_system_call,
+ else set bfd_error_file_truncated.
+
+ A BFD backend may wish to override bfd_error_file_truncated to
+ provide something more useful (eg. no_symbols or wrong_format). */
+ if (nread != (int) (size * nitems))
+ {
+ if (ferror (bfd_cache_lookup (abfd)))
+ bfd_set_error (bfd_error_system_call);
+ else
+ bfd_set_error (bfd_error_file_truncated);
+ }
+
+ return nread;
+}
+
+/* The window support stuff should probably be broken out into
+ another file.... */
+/* The idea behind the next and refcount fields is that one mapped
+ region can suffice for multiple read-only windows or multiple
+ non-overlapping read-write windows. It's not implemented yet
+ though. */
+struct _bfd_window_internal {
+ struct _bfd_window_internal *next;
+ PTR data;
+ bfd_size_type size;
+ int refcount : 31; /* should be enough... */
+ unsigned mapped : 1; /* 1 = mmap, 0 = malloc */
+};
+
+void
+bfd_init_window (windowp)
+ bfd_window *windowp;
+{
+ windowp->data = 0;
+ windowp->i = 0;
+ windowp->size = 0;
}
+\f
+/* Currently, if USE_MMAP is undefined, none if the window stuff is
+ used. Okay, so it's mis-named. At least the command-line option
+ "--without-mmap" is more obvious than "--without-windows" or some
+ such. */
+#ifdef USE_MMAP
+#undef HAVE_MPROTECT /* code's not tested yet */
+
+#if HAVE_MMAP || HAVE_MPROTECT || HAVE_MADVISE
+#include <sys/mman.h>
+#endif
+
+#ifndef MAP_FILE
+#define MAP_FILE 0
+#endif
+
+static int debug_windows;
+
+void
+bfd_free_window (windowp)
+ bfd_window *windowp;
+{
+ bfd_window_internal *i = windowp->i;
+ windowp->i = 0;
+ windowp->data = 0;
+ if (i == 0)
+ return;
+ i->refcount--;
+ if (debug_windows)
+ fprintf (stderr, "freeing window @%p<%p,%lx,%p>\n",
+ windowp, windowp->data, windowp->size, windowp->i);
+ if (i->refcount != 0)
+ return;
+
+ if (i->mapped)
+ {
+#ifdef HAVE_MMAP
+ munmap (i->data, i->size);
+ goto no_free;
+#else
+ abort ();
+#endif
+ }
+#ifdef HAVE_MPROTECT
+ mprotect (i->data, i->size, PROT_READ | PROT_WRITE);
+#endif
+ free (i->data);
+#ifdef HAVE_MMAP
+ no_free:
+#endif
+ i->data = 0;
+ /* There should be no more references to i at this point. */
+ free (i);
+}
+
+static int ok_to_map = 1;
+
+boolean
+bfd_get_file_window (abfd, offset, size, windowp, writable)
+ bfd *abfd;
+ file_ptr offset;
+ bfd_size_type size;
+ bfd_window *windowp;
+ boolean writable;
+{
+ static size_t pagesize;
+ bfd_window_internal *i = windowp->i;
+ size_t size_to_alloc = size;
+
+ if (debug_windows)
+ fprintf (stderr, "bfd_get_file_window (%p, %6ld, %6ld, %p<%p,%lx,%p>, %d)",
+ abfd, (long) offset, (long) size,
+ windowp, windowp->data, (unsigned long) windowp->size,
+ windowp->i, writable);
+
+ /* Make sure we know the page size, so we can be friendly to mmap. */
+ if (pagesize == 0)
+ pagesize = getpagesize ();
+ if (pagesize == 0)
+ abort ();
+
+ if (i == 0)
+ {
+ windowp->i = i = (bfd_window_internal *) bfd_zmalloc (sizeof (bfd_window_internal));
+ if (i == 0)
+ return false;
+ i->data = 0;
+ }
+#ifdef HAVE_MMAP
+ if (ok_to_map
+ && (i->data == 0 || i->mapped == 1)
+ && (abfd->flags & BFD_IN_MEMORY) == 0)
+ {
+ file_ptr file_offset, offset2;
+ size_t real_size;
+ int fd;
+ FILE *f;
+
+ /* Find the real file and the real offset into it. */
+ while (abfd->my_archive != NULL)
+ {
+ offset += abfd->origin;
+ abfd = abfd->my_archive;
+ }
+ f = bfd_cache_lookup (abfd);
+ fd = fileno (f);
+
+ /* Compute offsets and size for mmap and for the user's data. */
+ offset2 = offset % pagesize;
+ if (offset2 < 0)
+ abort ();
+ file_offset = offset - offset2;
+ real_size = offset + size - file_offset;
+ real_size = real_size + pagesize - 1;
+ real_size -= real_size % pagesize;
+
+ /* If we're re-using a memory region, make sure it's big enough. */
+ if (i->data && i->size < size)
+ {
+ munmap (i->data, i->size);
+ i->data = 0;
+ }
+ i->data = mmap (i->data, real_size,
+ writable ? PROT_WRITE | PROT_READ : PROT_READ,
+ (writable
+ ? MAP_FILE | MAP_PRIVATE
+ : MAP_FILE | MAP_SHARED),
+ fd, file_offset);
+ if (i->data == (PTR) -1)
+ {
+ /* An error happened. Report it, or try using malloc, or
+ something. */
+ bfd_set_error (bfd_error_system_call);
+ i->data = 0;
+ windowp->data = 0;
+ if (debug_windows)
+ fprintf (stderr, "\t\tmmap failed!\n");
+ return false;
+ }
+ if (debug_windows)
+ fprintf (stderr, "\n\tmapped %ld at %p, offset is %ld\n",
+ (long) real_size, i->data, (long) offset2);
+ i->size = real_size;
+ windowp->data = (PTR) ((bfd_byte *) i->data + offset2);
+ windowp->size = size;
+ i->mapped = 1;
+ return true;
+ }
+ else if (debug_windows)
+ {
+ if (ok_to_map)
+ fprintf (stderr, _("not mapping: data=%lx mapped=%d\n"),
+ (unsigned long) i->data, (int) i->mapped);
+ else
+ fprintf (stderr, _("not mapping: env var not set\n"));
+ }
+#else
+ ok_to_map = 0;
+#endif
+
+#ifdef HAVE_MPROTECT
+ if (!writable)
+ {
+ size_to_alloc += pagesize - 1;
+ size_to_alloc -= size_to_alloc % pagesize;
+ }
+#endif
+ if (debug_windows)
+ fprintf (stderr, "\n\t%s(%6ld)",
+ i->data ? "realloc" : " malloc", (long) size_to_alloc);
+ i->data = (PTR) bfd_realloc (i->data, size_to_alloc);
+ if (debug_windows)
+ fprintf (stderr, "\t-> %p\n", i->data);
+ i->refcount = 1;
+ if (i->data == NULL)
+ {
+ if (size_to_alloc == 0)
+ return true;
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+ if (bfd_seek (abfd, offset, SEEK_SET) != 0)
+ return false;
+ i->size = bfd_read (i->data, size, 1, abfd);
+ if (i->size != size)
+ return false;
+ i->mapped = 0;
+#ifdef HAVE_MPROTECT
+ if (!writable)
+ {
+ if (debug_windows)
+ fprintf (stderr, "\tmprotect (%p, %ld, PROT_READ)\n", i->data,
+ (long) i->size);
+ mprotect (i->data, i->size, PROT_READ);
+ }
+#endif
+ windowp->data = i->data;
+ windowp->size = i->size;
+ return true;
+}
+
+#endif /* USE_MMAP */
+\f
bfd_size_type
bfd_write (ptr, size, nitems, abfd)
- PTR ptr;
+ CONST PTR ptr;
bfd_size_type size;
bfd_size_type nitems;
bfd *abfd;
{
- return fwrite (ptr, 1, size*nitems, bfd_cache_lookup(abfd));
-}
+ long nwrote;
-int
-bfd_seek (abfd, position, direction)
-bfd * CONST abfd;
-CONST file_ptr position;
-CONST int direction;
-{
- /* For the time being, a bfd may not seek to it's end. The
- problem is that we don't easily have a way to recognize
- the end of an element in an archive. */
-
- BFD_ASSERT(direction == SEEK_SET
- || direction == SEEK_CUR);
-
- if (direction == SEEK_SET && abfd->my_archive != NULL)
+ if ((abfd->flags & BFD_IN_MEMORY) != 0)
+ {
+ struct bfd_in_memory *bim = (struct bfd_in_memory *) (abfd->iostream);
+ size *= nitems;
+ if (abfd->where + size > bim->size)
+ {
+ long newsize, oldsize = (bim->size + 127) & ~127;
+ bim->size = abfd->where + size;
+ /* Round up to cut down on memory fragmentation */
+ newsize = (bim->size + 127) & ~127;
+ if (newsize > oldsize)
{
- /* This is a set within an archive, so we need to
- add the base of the object within the archive */
- return(fseek(bfd_cache_lookup(abfd),
- position + abfd->origin,
- direction));
+ bim->buffer = bfd_realloc (bim->buffer, newsize);
+ if (bim->buffer == 0)
+ {
+ bim->size = 0;
+ return 0;
+ }
}
- else
- {
- return(fseek(bfd_cache_lookup(abfd), position, direction));
- }
+ }
+ memcpy (bim->buffer + abfd->where, ptr, size);
+ abfd->where += size;
+ return size;
+ }
+
+ nwrote = fwrite (ptr, 1, (size_t) (size * nitems),
+ bfd_cache_lookup (abfd));
+ if (nwrote > 0)
+ abfd->where += nwrote;
+ if ((bfd_size_type) nwrote != size * nitems)
+ {
+#ifdef ENOSPC
+ if (nwrote >= 0)
+ errno = ENOSPC;
+#endif
+ bfd_set_error (bfd_error_system_call);
+ }
+ return nwrote;
+}
+
+/*
+INTERNAL_FUNCTION
+ bfd_write_bigendian_4byte_int
+
+SYNOPSIS
+ void bfd_write_bigendian_4byte_int(bfd *abfd, int i);
+
+DESCRIPTION
+ Write a 4 byte integer @var{i} to the output BFD @var{abfd}, in big
+ endian order regardless of what else is going on. This is useful in
+ archives.
+
+*/
+void
+bfd_write_bigendian_4byte_int (abfd, i)
+ bfd *abfd;
+ int i;
+{
+ bfd_byte buffer[4];
+ bfd_putb32(i, buffer);
+ if (bfd_write((PTR)buffer, 4, 1, abfd) != 4)
+ abort ();
}
long
bfd_tell (abfd)
bfd *abfd;
{
- file_ptr ptr;
+ file_ptr ptr;
- ptr = ftell (bfd_cache_lookup(abfd));
+ if ((abfd->flags & BFD_IN_MEMORY) != 0)
+ return abfd->where;
- if (abfd->my_archive)
- ptr -= abfd->origin;
- return ptr;
+ ptr = ftell (bfd_cache_lookup(abfd));
+
+ if (abfd->my_archive)
+ ptr -= abfd->origin;
+ abfd->where = ptr;
+ return ptr;
}
-\f
-/** Make a string table */
-/* Add string to table pointed to by table, at location starting with free_ptr.
- resizes the table if necessary (if it's NULL, creates it, ignoring
- table_length). Updates free_ptr, table, table_length */
+int
+bfd_flush (abfd)
+ bfd *abfd;
+{
+ if ((abfd->flags & BFD_IN_MEMORY) != 0)
+ return 0;
+ return fflush (bfd_cache_lookup(abfd));
+}
-boolean
-bfd_add_to_string_table (table, new_string, table_length, free_ptr)
- char **table, **free_ptr;
- char *new_string;
- unsigned int *table_length;
-{
- size_t string_length = strlen (new_string) + 1; /* include null here */
- char *base = *table;
- size_t space_length = *table_length;
- unsigned int offset = (base ? *free_ptr - base : 0);
-
- if (base == NULL) {
- /* Avoid a useless regrow if we can (but of course we still
- take it next time */
- space_length = (string_length < DEFAULT_STRING_SPACE_SIZE ?
- DEFAULT_STRING_SPACE_SIZE : string_length+1);
- base = zalloc (space_length);
-
- if (base == NULL) {
- bfd_error = no_memory;
- return false;
+/* Returns 0 for success, negative value for failure (in which case
+ bfd_get_error can retrieve the error code). */
+int
+bfd_stat (abfd, statbuf)
+ bfd *abfd;
+ struct stat *statbuf;
+{
+ FILE *f;
+ int result;
+
+ if ((abfd->flags & BFD_IN_MEMORY) != 0)
+ abort ();
+
+ f = bfd_cache_lookup (abfd);
+ if (f == NULL)
+ {
+ bfd_set_error (bfd_error_system_call);
+ return -1;
}
- }
+ result = fstat (fileno (f), statbuf);
+ if (result < 0)
+ bfd_set_error (bfd_error_system_call);
+ return result;
+}
- if ((size_t)(offset + string_length) >= space_length) {
- /* Make sure we will have enough space */
- while ((size_t)(offset + string_length) >= space_length)
- space_length += space_length/2; /* grow by 50% */
+/* Returns 0 for success, nonzero for failure (in which case bfd_get_error
+ can retrieve the error code). */
- base = (char *) realloc (base, space_length);
- if (base == NULL) {
- bfd_error = no_memory;
- return false;
+int
+bfd_seek (abfd, position, direction)
+ bfd *abfd;
+ file_ptr position;
+ int direction;
+{
+ int result;
+ FILE *f;
+ file_ptr file_position;
+ /* For the time being, a BFD may not seek to it's end. The problem
+ is that we don't easily have a way to recognize the end of an
+ element in an archive. */
+
+ BFD_ASSERT (direction == SEEK_SET || direction == SEEK_CUR);
+
+ if (direction == SEEK_CUR && position == 0)
+ return 0;
+
+ if ((abfd->flags & BFD_IN_MEMORY) != 0)
+ {
+ struct bfd_in_memory *bim;
+
+ bim = (struct bfd_in_memory *) abfd->iostream;
+
+ if (direction == SEEK_SET)
+ abfd->where = position;
+ else
+ abfd->where += position;
+
+ if (abfd->where > bim->size)
+ {
+ abfd->where = bim->size;
+ bfd_set_error (bfd_error_file_truncated);
+ return -1;
+ }
+
+ return 0;
+ }
+
+ if (abfd->format != bfd_archive && abfd->my_archive == 0)
+ {
+#if 0
+ /* Explanation for this code: I'm only about 95+% sure that the above
+ conditions are sufficient and that all i/o calls are properly
+ adjusting the `where' field. So this is sort of an `assert'
+ that the `where' field is correct. If we can go a while without
+ tripping the abort, we can probably safely disable this code,
+ so that the real optimizations happen. */
+ file_ptr where_am_i_now;
+ where_am_i_now = ftell (bfd_cache_lookup (abfd));
+ if (abfd->my_archive)
+ where_am_i_now -= abfd->origin;
+ if (where_am_i_now != abfd->where)
+ abort ();
+#endif
+ if (direction == SEEK_SET && position == abfd->where)
+ return 0;
}
+ else
+ {
+ /* We need something smarter to optimize access to archives.
+ Currently, anything inside an archive is read via the file
+ handle for the archive. Which means that a bfd_seek on one
+ component affects the `current position' in the archive, as
+ well as in any other component.
- }
+ It might be sufficient to put a spike through the cache
+ abstraction, and look to the archive for the file position,
+ but I think we should try for something cleaner.
- memcpy (base + offset, new_string, string_length);
- *table = base;
- *table_length = space_length;
- *free_ptr = base + offset + string_length;
-
- return true;
+ In the meantime, no optimization for archives. */
+ }
+
+ f = bfd_cache_lookup (abfd);
+ file_position = position;
+ if (direction == SEEK_SET && abfd->my_archive != NULL)
+ file_position += abfd->origin;
+
+ result = fseek (f, file_position, direction);
+
+ if (result != 0)
+ {
+ int hold_errno = errno;
+
+ /* Force redetermination of `where' field. */
+ bfd_tell (abfd);
+
+ /* An EINVAL error probably means that the file offset was
+ absurd. */
+ if (hold_errno == EINVAL)
+ bfd_set_error (bfd_error_file_truncated);
+ else
+ {
+ bfd_set_error (bfd_error_system_call);
+ errno = hold_errno;
+ }
+ }
+ else
+ {
+ /* Adjust `where' field. */
+ if (direction == SEEK_SET)
+ abfd->where = position;
+ else
+ abfd->where += position;
+ }
+ return result;
}
\f
/** The do-it-yourself (byte) sex-change kit */
/* FIXME: Should these take a count argument?
Answer (gnu@cygnus.com): No, but perhaps they should be inline
- functions in swap.h #ifdef __GNUC__.
- Gprof them later and find out. */
+ functions in swap.h #ifdef __GNUC__.
+ Gprof them later and find out. */
+
+/*
+FUNCTION
+ bfd_put_size
+FUNCTION
+ bfd_get_size
+
+DESCRIPTION
+ These macros as used for reading and writing raw data in
+ sections; each access (except for bytes) is vectored through
+ the target format of the BFD and mangled accordingly. The
+ mangling performs any necessary endian translations and
+ removes alignment restrictions. Note that types accepted and
+ returned by these macros are identical so they can be swapped
+ around in macros---for example, @file{libaout.h} defines <<GET_WORD>>
+ to either <<bfd_get_32>> or <<bfd_get_64>>.
+
+ In the put routines, @var{val} must be a <<bfd_vma>>. If we are on a
+ system without prototypes, the caller is responsible for making
+ sure that is true, with a cast if necessary. We don't cast
+ them in the macro definitions because that would prevent <<lint>>
+ or <<gcc -Wall>> from detecting sins such as passing a pointer.
+ To detect calling these with less than a <<bfd_vma>>, use
+ <<gcc -Wconversion>> on a host with 64 bit <<bfd_vma>>'s.
+
+.
+.{* Byte swapping macros for user section data. *}
+.
+.#define bfd_put_8(abfd, val, ptr) \
+. ((void) (*((unsigned char *)(ptr)) = (unsigned char)(val)))
+.#define bfd_put_signed_8 \
+. bfd_put_8
+.#define bfd_get_8(abfd, ptr) \
+. (*(unsigned char *)(ptr))
+.#define bfd_get_signed_8(abfd, ptr) \
+. ((*(unsigned char *)(ptr) ^ 0x80) - 0x80)
+.
+.#define bfd_put_16(abfd, val, ptr) \
+. BFD_SEND(abfd, bfd_putx16, ((val),(ptr)))
+.#define bfd_put_signed_16 \
+. bfd_put_16
+.#define bfd_get_16(abfd, ptr) \
+. BFD_SEND(abfd, bfd_getx16, (ptr))
+.#define bfd_get_signed_16(abfd, ptr) \
+. BFD_SEND (abfd, bfd_getx_signed_16, (ptr))
+.
+.#define bfd_put_32(abfd, val, ptr) \
+. BFD_SEND(abfd, bfd_putx32, ((val),(ptr)))
+.#define bfd_put_signed_32 \
+. bfd_put_32
+.#define bfd_get_32(abfd, ptr) \
+. BFD_SEND(abfd, bfd_getx32, (ptr))
+.#define bfd_get_signed_32(abfd, ptr) \
+. BFD_SEND(abfd, bfd_getx_signed_32, (ptr))
+.
+.#define bfd_put_64(abfd, val, ptr) \
+. BFD_SEND(abfd, bfd_putx64, ((val), (ptr)))
+.#define bfd_put_signed_64 \
+. bfd_put_64
+.#define bfd_get_64(abfd, ptr) \
+. BFD_SEND(abfd, bfd_getx64, (ptr))
+.#define bfd_get_signed_64(abfd, ptr) \
+. BFD_SEND(abfd, bfd_getx_signed_64, (ptr))
+.
+.#define bfd_get(bits, abfd, ptr) \
+. ((bits) == 8 ? bfd_get_8 (abfd, ptr) \
+. : (bits) == 16 ? bfd_get_16 (abfd, ptr) \
+. : (bits) == 32 ? bfd_get_32 (abfd, ptr) \
+. : (bits) == 64 ? bfd_get_64 (abfd, ptr) \
+. : (abort (), (bfd_vma) - 1))
+.
+.#define bfd_put(bits, abfd, val, ptr) \
+. ((bits) == 8 ? bfd_put_8 (abfd, val, ptr) \
+. : (bits) == 16 ? bfd_put_16 (abfd, val, ptr) \
+. : (bits) == 32 ? bfd_put_32 (abfd, val, ptr) \
+. : (bits) == 64 ? bfd_put_64 (abfd, val, ptr) \
+. : (abort (), (void) 0))
+.
+*/
+
+/*
+FUNCTION
+ bfd_h_put_size
+ bfd_h_get_size
+
+DESCRIPTION
+ These macros have the same function as their <<bfd_get_x>>
+ bretheren, except that they are used for removing information
+ for the header records of object files. Believe it or not,
+ some object files keep their header records in big endian
+ order and their data in little endian order.
+.
+.{* Byte swapping macros for file header data. *}
+.
+.#define bfd_h_put_8(abfd, val, ptr) \
+. bfd_put_8 (abfd, val, ptr)
+.#define bfd_h_put_signed_8(abfd, val, ptr) \
+. bfd_put_8 (abfd, val, ptr)
+.#define bfd_h_get_8(abfd, ptr) \
+. bfd_get_8 (abfd, ptr)
+.#define bfd_h_get_signed_8(abfd, ptr) \
+. bfd_get_signed_8 (abfd, ptr)
+.
+.#define bfd_h_put_16(abfd, val, ptr) \
+. BFD_SEND(abfd, bfd_h_putx16,(val,ptr))
+.#define bfd_h_put_signed_16 \
+. bfd_h_put_16
+.#define bfd_h_get_16(abfd, ptr) \
+. BFD_SEND(abfd, bfd_h_getx16,(ptr))
+.#define bfd_h_get_signed_16(abfd, ptr) \
+. BFD_SEND(abfd, bfd_h_getx_signed_16, (ptr))
+.
+.#define bfd_h_put_32(abfd, val, ptr) \
+. BFD_SEND(abfd, bfd_h_putx32,(val,ptr))
+.#define bfd_h_put_signed_32 \
+. bfd_h_put_32
+.#define bfd_h_get_32(abfd, ptr) \
+. BFD_SEND(abfd, bfd_h_getx32,(ptr))
+.#define bfd_h_get_signed_32(abfd, ptr) \
+. BFD_SEND(abfd, bfd_h_getx_signed_32, (ptr))
+.
+.#define bfd_h_put_64(abfd, val, ptr) \
+. BFD_SEND(abfd, bfd_h_putx64,(val, ptr))
+.#define bfd_h_put_signed_64 \
+. bfd_h_put_64
+.#define bfd_h_get_64(abfd, ptr) \
+. BFD_SEND(abfd, bfd_h_getx64,(ptr))
+.#define bfd_h_get_signed_64(abfd, ptr) \
+. BFD_SEND(abfd, bfd_h_getx_signed_64, (ptr))
+.
+*/
+
+/* Sign extension to bfd_signed_vma. */
+#define COERCE16(x) (((bfd_signed_vma) (x) ^ 0x8000) - 0x8000)
+#define COERCE32(x) \
+ ((bfd_signed_vma) (long) (((unsigned long) (x) ^ 0x80000000) - 0x80000000))
+#define EIGHT_GAZILLION (((BFD_HOST_64_BIT)0x80000000) << 32)
+#define COERCE64(x) \
+ (((bfd_signed_vma) (x) ^ EIGHT_GAZILLION) - EIGHT_GAZILLION)
+
+bfd_vma
+bfd_getb16 (addr)
+ register const bfd_byte *addr;
+{
+ return (addr[0] << 8) | addr[1];
+}
-short
-_do_getbshort (addr)
- register bfd_byte *addr;
+bfd_vma
+bfd_getl16 (addr)
+ register const bfd_byte *addr;
{
- return (addr[0] << 8) | addr[1];
+ return (addr[1] << 8) | addr[0];
}
-short
-_do_getlshort (addr)
- register bfd_byte *addr;
+bfd_signed_vma
+bfd_getb_signed_16 (addr)
+ register const bfd_byte *addr;
{
- return (addr[1] << 8) | addr[0];
+ return COERCE16((addr[0] << 8) | addr[1]);
+}
+
+bfd_signed_vma
+bfd_getl_signed_16 (addr)
+ register const bfd_byte *addr;
+{
+ return COERCE16((addr[1] << 8) | addr[0]);
}
void
-_do_putbshort (data, addr)
- int data; /* Actually short, but ansi C sucks */
- register bfd_byte *addr;
+bfd_putb16 (data, addr)
+ bfd_vma data;
+ register bfd_byte *addr;
{
- addr[0] = (bfd_byte)(data >> 8);
- addr[1] = (bfd_byte )data;
+ addr[0] = (bfd_byte)(data >> 8);
+ addr[1] = (bfd_byte )data;
}
void
-_do_putlshort (data, addr)
- int data; /* Actually short, but ansi C sucks */
- register bfd_byte *addr;
+bfd_putl16 (data, addr)
+ bfd_vma data;
+ register bfd_byte *addr;
{
- addr[0] = (bfd_byte )data;
- addr[1] = (bfd_byte)(data >> 8);
+ addr[0] = (bfd_byte )data;
+ addr[1] = (bfd_byte)(data >> 8);
}
-long
-_do_getblong (addr)
- register bfd_byte *addr;
+bfd_vma
+bfd_getb32 (addr)
+ register const bfd_byte *addr;
{
- return ((((addr[0] << 8) | addr[1]) << 8) | addr[2]) << 8 | addr[3];
+ unsigned long v;
+
+ v = (unsigned long) addr[0] << 24;
+ v |= (unsigned long) addr[1] << 16;
+ v |= (unsigned long) addr[2] << 8;
+ v |= (unsigned long) addr[3];
+ return (bfd_vma) v;
}
-long
-_do_getllong (addr)
- register bfd_byte *addr;
+bfd_vma
+bfd_getl32 (addr)
+ register const bfd_byte *addr;
+{
+ unsigned long v;
+
+ v = (unsigned long) addr[0];
+ v |= (unsigned long) addr[1] << 8;
+ v |= (unsigned long) addr[2] << 16;
+ v |= (unsigned long) addr[3] << 24;
+ return (bfd_vma) v;
+}
+
+bfd_signed_vma
+bfd_getb_signed_32 (addr)
+ register const bfd_byte *addr;
+{
+ unsigned long v;
+
+ v = (unsigned long) addr[0] << 24;
+ v |= (unsigned long) addr[1] << 16;
+ v |= (unsigned long) addr[2] << 8;
+ v |= (unsigned long) addr[3];
+ return COERCE32 (v);
+}
+
+bfd_signed_vma
+bfd_getl_signed_32 (addr)
+ register const bfd_byte *addr;
+{
+ unsigned long v;
+
+ v = (unsigned long) addr[0];
+ v |= (unsigned long) addr[1] << 8;
+ v |= (unsigned long) addr[2] << 16;
+ v |= (unsigned long) addr[3] << 24;
+ return COERCE32 (v);
+}
+
+bfd_vma
+bfd_getb64 (addr)
+ register const bfd_byte *addr ATTRIBUTE_UNUSED;
+{
+#ifdef BFD64
+ bfd_vma low, high;
+
+ high= ((((((((addr[0]) << 8) |
+ addr[1]) << 8) |
+ addr[2]) << 8) |
+ addr[3]) );
+
+ low = (((((((((bfd_vma)addr[4]) << 8) |
+ addr[5]) << 8) |
+ addr[6]) << 8) |
+ addr[7]));
+
+ return high << 32 | low;
+#else
+ BFD_FAIL();
+ return 0;
+#endif
+}
+
+bfd_vma
+bfd_getl64 (addr)
+ register const bfd_byte *addr ATTRIBUTE_UNUSED;
+{
+#ifdef BFD64
+ bfd_vma low, high;
+ high= (((((((addr[7] << 8) |
+ addr[6]) << 8) |
+ addr[5]) << 8) |
+ addr[4]));
+
+ low = ((((((((bfd_vma)addr[3] << 8) |
+ addr[2]) << 8) |
+ addr[1]) << 8) |
+ addr[0]) );
+
+ return high << 32 | low;
+#else
+ BFD_FAIL();
+ return 0;
+#endif
+
+}
+
+bfd_signed_vma
+bfd_getb_signed_64 (addr)
+ register const bfd_byte *addr ATTRIBUTE_UNUSED;
{
- return ((((addr[3] << 8) | addr[2]) << 8) | addr[1]) << 8 | addr[0];
+#ifdef BFD64
+ bfd_vma low, high;
+
+ high= ((((((((addr[0]) << 8) |
+ addr[1]) << 8) |
+ addr[2]) << 8) |
+ addr[3]) );
+
+ low = (((((((((bfd_vma)addr[4]) << 8) |
+ addr[5]) << 8) |
+ addr[6]) << 8) |
+ addr[7]));
+
+ return COERCE64(high << 32 | low);
+#else
+ BFD_FAIL();
+ return 0;
+#endif
+}
+
+bfd_signed_vma
+bfd_getl_signed_64 (addr)
+ register const bfd_byte *addr ATTRIBUTE_UNUSED;
+{
+#ifdef BFD64
+ bfd_vma low, high;
+ high= (((((((addr[7] << 8) |
+ addr[6]) << 8) |
+ addr[5]) << 8) |
+ addr[4]));
+
+ low = ((((((((bfd_vma)addr[3] << 8) |
+ addr[2]) << 8) |
+ addr[1]) << 8) |
+ addr[0]) );
+
+ return COERCE64(high << 32 | low);
+#else
+ BFD_FAIL();
+ return 0;
+#endif
}
void
-_do_putblong (data, addr)
- unsigned long data;
- register bfd_byte *addr;
+bfd_putb32 (data, addr)
+ bfd_vma data;
+ register bfd_byte *addr;
{
- addr[0] = (bfd_byte)(data >> 24);
- addr[1] = (bfd_byte)(data >> 16);
- addr[2] = (bfd_byte)(data >> 8);
- addr[3] = (bfd_byte)data;
+ addr[0] = (bfd_byte)(data >> 24);
+ addr[1] = (bfd_byte)(data >> 16);
+ addr[2] = (bfd_byte)(data >> 8);
+ addr[3] = (bfd_byte)data;
}
void
-_do_putllong (data, addr)
- unsigned long data;
- register bfd_byte *addr;
+bfd_putl32 (data, addr)
+ bfd_vma data;
+ register bfd_byte *addr;
+{
+ addr[0] = (bfd_byte)data;
+ addr[1] = (bfd_byte)(data >> 8);
+ addr[2] = (bfd_byte)(data >> 16);
+ addr[3] = (bfd_byte)(data >> 24);
+}
+
+void
+bfd_putb64 (data, addr)
+ bfd_vma data ATTRIBUTE_UNUSED;
+ register bfd_byte *addr ATTRIBUTE_UNUSED;
+{
+#ifdef BFD64
+ addr[0] = (bfd_byte)(data >> (7*8));
+ addr[1] = (bfd_byte)(data >> (6*8));
+ addr[2] = (bfd_byte)(data >> (5*8));
+ addr[3] = (bfd_byte)(data >> (4*8));
+ addr[4] = (bfd_byte)(data >> (3*8));
+ addr[5] = (bfd_byte)(data >> (2*8));
+ addr[6] = (bfd_byte)(data >> (1*8));
+ addr[7] = (bfd_byte)(data >> (0*8));
+#else
+ BFD_FAIL();
+#endif
+}
+
+void
+bfd_putl64 (data, addr)
+ bfd_vma data ATTRIBUTE_UNUSED;
+ register bfd_byte *addr ATTRIBUTE_UNUSED;
+{
+#ifdef BFD64
+ addr[7] = (bfd_byte)(data >> (7*8));
+ addr[6] = (bfd_byte)(data >> (6*8));
+ addr[5] = (bfd_byte)(data >> (5*8));
+ addr[4] = (bfd_byte)(data >> (4*8));
+ addr[3] = (bfd_byte)(data >> (3*8));
+ addr[2] = (bfd_byte)(data >> (2*8));
+ addr[1] = (bfd_byte)(data >> (1*8));
+ addr[0] = (bfd_byte)(data >> (0*8));
+#else
+ BFD_FAIL();
+#endif
+}
+\f
+/* Default implementation */
+
+boolean
+_bfd_generic_get_section_contents (abfd, section, location, offset, count)
+ bfd *abfd;
+ sec_ptr section;
+ PTR location;
+ file_ptr offset;
+ bfd_size_type count;
+{
+ if (count == 0)
+ return true;
+
+ if ((bfd_size_type) (offset + count) > section->_raw_size)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return false;
+ }
+
+ if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
+ || bfd_read (location, (bfd_size_type) 1, count, abfd) != count)
+ return false;
+
+ return true;
+}
+
+boolean
+_bfd_generic_get_section_contents_in_window (abfd, section, w, offset, count)
+ bfd *abfd ATTRIBUTE_UNUSED;
+ sec_ptr section ATTRIBUTE_UNUSED;
+ bfd_window *w ATTRIBUTE_UNUSED;
+ file_ptr offset ATTRIBUTE_UNUSED;
+ bfd_size_type count ATTRIBUTE_UNUSED;
{
- addr[0] = (bfd_byte)data;
- addr[1] = (bfd_byte)(data >> 8);
- addr[2] = (bfd_byte)(data >> 16);
- addr[3] = (bfd_byte)(data >> 24);
+#ifdef USE_MMAP
+ if (count == 0)
+ return true;
+ if (abfd->xvec->_bfd_get_section_contents != _bfd_generic_get_section_contents)
+ {
+ /* We don't know what changes the bfd's get_section_contents
+ method may have to make. So punt trying to map the file
+ window, and let get_section_contents do its thing. */
+ /* @@ FIXME : If the internal window has a refcount of 1 and was
+ allocated with malloc instead of mmap, just reuse it. */
+ bfd_free_window (w);
+ w->i = (bfd_window_internal *) bfd_zmalloc (sizeof (bfd_window_internal));
+ if (w->i == NULL)
+ return false;
+ w->i->data = (PTR) bfd_malloc ((size_t) count);
+ if (w->i->data == NULL)
+ {
+ free (w->i);
+ w->i = NULL;
+ return false;
+ }
+ w->i->mapped = 0;
+ w->i->refcount = 1;
+ w->size = w->i->size = count;
+ w->data = w->i->data;
+ return bfd_get_section_contents (abfd, section, w->data, offset, count);
+ }
+ if ((bfd_size_type) (offset+count) > section->_raw_size
+ || (bfd_get_file_window (abfd, section->filepos + offset, count, w, true)
+ == false))
+ return false;
+ return true;
+#else
+ abort ();
+#endif
}
+/* This generic function can only be used in implementations where creating
+ NEW sections is disallowed. It is useful in patching existing sections
+ in read-write files, though. See other set_section_contents functions
+ to see why it doesn't work for new sections. */
+boolean
+_bfd_generic_set_section_contents (abfd, section, location, offset, count)
+ bfd *abfd;
+ sec_ptr section;
+ PTR location;
+ file_ptr offset;
+ bfd_size_type count;
+{
+ if (count == 0)
+ return true;
+
+ if (bfd_seek (abfd, (file_ptr) (section->filepos + offset), SEEK_SET) == -1
+ || bfd_write (location, (bfd_size_type) 1, count, abfd) != count)
+ return false;
+ return true;
+}
+/*
+INTERNAL_FUNCTION
+ bfd_log2
+SYNOPSIS
+ unsigned int bfd_log2(bfd_vma x);
+DESCRIPTION
+ Return the log base 2 of the value supplied, rounded up. E.g., an
+ @var{x} of 1025 returns 11.
+*/
+unsigned int
+bfd_log2 (x)
+ bfd_vma x;
+{
+ unsigned int result = 0;
+ while ((x = (x >> 1)) != 0)
+ ++result;
+ return result;
+}
+
+boolean
+bfd_generic_is_local_label_name (abfd, name)
+ bfd *abfd;
+ const char *name;
+{
+ char locals_prefix = (bfd_get_symbol_leading_char (abfd) == '_') ? 'L' : '.';
+
+ return (name[0] == locals_prefix);
+}
+
+/* Can be used from / for bfd_merge_private_bfd_data to check that
+ endianness matches between input and output file. Returns
+ true for a match, otherwise returns false and emits an error. */
+boolean
+_bfd_generic_verify_endian_match (ibfd, obfd)
+ bfd *ibfd;
+ bfd *obfd;
+{
+ if (ibfd->xvec->byteorder != obfd->xvec->byteorder
+ && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
+ {
+ (*_bfd_error_handler)
+ ("%s: compiled for a %s endian system and target is %s endian",
+ bfd_get_filename (ibfd),
+ bfd_big_endian (ibfd) ? "big" : "little",
+ bfd_big_endian (obfd) ? "big" : "little");
+
+ bfd_set_error (bfd_error_wrong_format);
+ return false;
+ }
+
+ return true;
+}
projects / external / binutils.git / blobdiff