Introduce target-section.h

This introduces a new target-section.h file.  This makes some of the
later patches in this series a bit cleaner, because new includes of
target.h won't be required.  Also I think it's better to have small
header files for each separate data structure.

gdb/ChangeLog
2020-10-12  Tom Tromey  <tom@tromey.com>

	* target.h (struct target_section, struct target_section_table):
	Move to target-section.h.
	* target-section.h: New file.

1 files changed, 53 insertions, 0 deletions

diff --git a/gdb/target-section.h b/gdb/target-section.h
new file mode 100644
index 0000000..ff81675
--- /dev/null
+++ b/gdb/target-section.h
@@ -0,0 +1,53 @@
+/* Target sections.
+
+   Copyright (C) 2020 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 3 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, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef GDB_TARGET_SECTION_H
+#define GDB_TARGET_SECTION_H
+
+/* Struct target_section maps address ranges to file sections.  It is
+   mostly used with BFD files, but can be used without (e.g. for handling
+   raw disks, or files not in formats handled by BFD).  */
+
+struct target_section
+{
+  /* Lowest address in section.  */
+  CORE_ADDR addr;
+  /* Highest address in section, plus 1.  */
+  CORE_ADDR endaddr;
+
+  /* The BFD section.  */
+  struct bfd_section *the_bfd_section;
+
+  /* The "owner" of the section.
+     It can be any unique value.  It is set by add_target_sections
+     and used by remove_target_sections.
+     For example, for executables it is a pointer to exec_bfd and
+     for shlibs it is the so_list pointer.  */
+  void *owner;
+};
+
+/* Holds an array of target sections.  Defined by [SECTIONS..SECTIONS_END[.  */
+
+struct target_section_table
+{
+  struct target_section *sections;
+  struct target_section *sections_end;
+};
+
+#endif /* GDB_TARGET_SECTION_H */