/* Very simple "bfd" target, for GDB, the GNU debugger.
- Copyright (C) 2003, 2005, 2007, 2008, 2009 Free Software Foundation, Inc.
+ Copyright (C) 2003-2020 Free Software Foundation, Inc.
This file is part of GDB.
#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. */
+/* A target that wraps a BFD. */
-struct section_closure
-{
- struct section_table *end;
+static const target_info target_bfd_target_info = {
+ "bfd",
+ N_("BFD backed target"),
+ N_("You should never see this")
};
-static void
-add_to_section_table (struct bfd *abfd, struct bfd_section *asect,
- void *closure)
+class target_bfd : public target_ops
{
- 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++;
-}
+public:
+ explicit target_bfd (struct bfd *bfd);
+ ~target_bfd () override;
-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);
-}
+ const target_info &info () const override
+ { return target_bfd_target_info; }
+
+ strata stratum () const override { return file_stratum; }
+
+ void close () override;
+
+ target_xfer_status
+ xfer_partial (target_object object,
+ const char *annex, gdb_byte *readbuf,
+ const gdb_byte *writebuf,
+ ULONGEST offset, ULONGEST len,
+ ULONGEST *xfered_len) override;
+
+ target_section_table *get_section_table () override;
+
+private:
+ /* The BFD we're wrapping. */
+ gdb_bfd_ref_ptr m_bfd;
+
+ /* 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 m_table;
+};
-static LONGEST
-target_bfd_xfer_partial (struct target_ops *ops,
- enum target_object object,
- const char *annex, gdb_byte *readbuf,
- const gdb_byte *writebuf,
- ULONGEST offset, LONGEST len)
+target_xfer_status
+target_bfd::xfer_partial (target_object object,
+ 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;
+ return section_table_xfer_memory_partial (readbuf, writebuf,
+ offset, len, xfered_len,
+ m_table.sections,
+ m_table.sections_end,
+ NULL);
}
default:
- return -1;
+ return TARGET_XFER_E_IO;
}
}
-static void
-target_bfd_xclose (struct target_ops *t, int quitting)
+target_section_table *
+target_bfd::get_section_table ()
+{
+ return &m_table;
+}
+
+target_bfd::target_bfd (struct bfd *abfd)
+ : m_bfd (gdb_bfd_ref_ptr::new_reference (abfd))
{
- bfd_close (t->to_data);
- xfree (t->to_sections);
- xfree (t);
+ m_table.sections = NULL;
+ m_table.sections_end = NULL;
+ build_section_table (abfd, &m_table.sections, &m_table.sections_end);
}
-struct target_ops *
-target_bfd_reopen (struct bfd *bfd)
+target_bfd::~target_bfd ()
+{
+ xfree (m_table.sections);
+}
+
+target_ops *
+target_bfd_reopen (struct bfd *abfd)
+{
+ return new target_bfd (abfd);
+}
+
+void
+target_bfd::close ()
{
- struct target_ops *t = XZALLOC (struct target_ops);
- t->to_shortname = "bfd";
- t->to_longname = _("BFD backed target");
- t->to_doc = _("You should never see this");
- 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);
- return t;
+ delete this;
}
projects / deliverable / binutils-gdb.git / blobdiff