/* Very simple "bfd" target, for GDB, the GNU debugger.
- Copyright 2003 Free Software Foundation, Inc.
+ Copyright (C) 2003-2016 Free Software Foundation, Inc.
This file is part of GDB.
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
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
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., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "target.h"
#include "bfd-target.h"
-#include "gdb_assert.h"
-#include "gdb_string.h"
+#include "exec.h"
+#include "gdb_bfd.h"
-/* Locate all mappable sections of a BFD file, filling in a target
- section for each. */
-
-struct section_closure
+/* The object that is stored in the target_ops->to_data field has this
+ type. */
+struct target_bfd_data
{
- struct section_table *end;
-};
+ /* The BFD we're wrapping. */
+ struct bfd *bfd;
-static void
-add_to_section_table (struct bfd *abfd, struct bfd_section *asect,
- void *closure)
-{
- struct section_closure *pp = closure;
- flagword aflag;
-
- /* NOTE: cagney/2003-10-22: Is this pruning useful? */
- aflag = bfd_get_section_flags (abfd, asect);
- if (!(aflag & SEC_ALLOC))
- return;
- if (bfd_section_size (abfd, asect) == 0)
- return;
- pp->end->bfd = abfd;
- pp->end->the_bfd_section = asect;
- pp->end->addr = bfd_section_vma (abfd, asect);
- pp->end->endaddr = pp->end->addr + bfd_section_size (abfd, asect);
- pp->end++;
-}
-
-void
-build_target_sections_from_bfd (struct target_ops *targ, struct bfd *abfd)
-{
- unsigned count;
- struct section_table *start;
- struct section_closure cl;
-
- count = bfd_count_sections (abfd);
- target_resize_to_sections (targ, count);
- start = targ->to_sections;
- cl.end = targ->to_sections;
- bfd_map_over_sections (abfd, add_to_section_table, &cl);
- gdb_assert (cl.end - start <= count);
-}
+ /* The section table build from the ALLOC sections in BFD. Note
+ that we can't rely on extracting the BFD from a random section in
+ the table, since the table can be legitimately empty. */
+ struct target_section_table table;
+};
-LONGEST
+static enum target_xfer_status
target_bfd_xfer_partial (struct target_ops *ops,
enum target_object object,
- const char *annex, void *readbuf,
- const void *writebuf, ULONGEST offset, LONGEST len)
+ const char *annex, gdb_byte *readbuf,
+ const gdb_byte *writebuf,
+ ULONGEST offset, ULONGEST len,
+ ULONGEST *xfered_len)
{
switch (object)
{
case TARGET_OBJECT_MEMORY:
{
- struct section_table *s = target_section_by_addr (ops, offset);
- if (s == NULL)
- return -1;
- /* If the length extends beyond the section, truncate it. Be
- careful to not suffer from overflow (wish S contained a
- length). */
- if ((offset - s->addr + len) > (s->endaddr - s->addr))
- len = (s->endaddr - s->addr) - (offset - s->addr);
- if (readbuf != NULL
- && !bfd_get_section_contents (s->bfd, s->the_bfd_section,
- readbuf, offset - s->addr, len))
- return -1;
-#if 1
- if (writebuf != NULL)
- return -1;
-#else
- /* FIXME: cagney/2003-10-31: The BFD interface doesn't yet
- take a const buffer. */
- if (writebuf != NULL
- && !bfd_set_section_contents (s->bfd, s->the_bfd_section,
- writebuf, offset - s->addr, len))
- return -1;
-#endif
- return len;
+ struct target_bfd_data *data = (struct target_bfd_data *) ops->to_data;
+ return section_table_xfer_memory_partial (readbuf, writebuf,
+ offset, len, xfered_len,
+ data->table.sections,
+ data->table.sections_end,
+ NULL);
}
default:
- return -1;
+ return TARGET_XFER_E_IO;
}
}
-void
-target_bfd_xclose (struct target_ops *t, int quitting)
+static struct target_section_table *
+target_bfd_get_section_table (struct target_ops *ops)
{
- bfd_close (t->to_data);
- xfree (t->to_sections);
+ struct target_bfd_data *data = (struct target_bfd_data *) ops->to_data;
+ return &data->table;
+}
+
+static void
+target_bfd_xclose (struct target_ops *t)
+{
+ struct target_bfd_data *data = (struct target_bfd_data *) t->to_data;
+
+ gdb_bfd_unref (data->bfd);
+ xfree (data->table.sections);
+ xfree (data);
xfree (t);
}
struct target_ops *
-target_bfd_reopen (struct bfd *bfd)
+target_bfd_reopen (struct bfd *abfd)
{
- struct target_ops *t = XZALLOC (struct target_ops);
+ struct target_ops *t;
+ struct target_bfd_data *data;
+
+ data = XCNEW (struct target_bfd_data);
+ data->bfd = abfd;
+ gdb_bfd_ref (abfd);
+ build_section_table (abfd, &data->table.sections, &data->table.sections_end);
+
+ t = XCNEW (struct target_ops);
t->to_shortname = "bfd";
- t->to_longname = "BFD backed target";
- t->to_doc = "You should never see this";
+ t->to_longname = _("BFD backed target");
+ t->to_doc = _("You should never see this");
+ t->to_get_section_table = target_bfd_get_section_table;
t->to_xfer_partial = target_bfd_xfer_partial;
t->to_xclose = target_bfd_xclose;
- t->to_data = bfd;
- build_target_sections_from_bfd (t, bfd);
+ t->to_data = data;
+ t->to_magic = OPS_MAGIC;
+
return t;
}
projects / deliverable / binutils-gdb.git / blobdiff