2c86cff96f
This moves some section-handling code from dwarf2read.c into new files, dwarf2/section.[ch]. gdb/ChangeLog 2020-02-08 Tom Tromey <tom@tromey.com> * dwarf2read.h (struct dwarf2_section_info, dwarf2_read_section): Move to dwarf2/section.h. * dwarf2read.c (get_containing_section, get_section_bfd_owner) (get_section_bfd_section, get_section_name) (get_section_file_name, get_section_id, get_section_flags) (dwarf2_section_empty_p, dwarf2_read_section): Moe to dwarf2/section.c. * dwarf2/section.h: New file. * dwarf2/section.c: New file, from dwarf2read.c. * Makefile.in (COMMON_SFILES): Add dwarf2/section.c. Change-Id: I9f8498094cf99d9521e9481622ce8adbd453daf4
122 lines
4.4 KiB
C
122 lines
4.4 KiB
C
/* DWARF 2 low-level section code
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Copyright (C) 1994-2020 Free Software Foundation, Inc.
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Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
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Inc. with support from Florida State University (under contract
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with the Ada Joint Program Office), and Silicon Graphics, Inc.
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Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
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based on Fred Fish's (Cygnus Support) implementation of DWARF 1
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support.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef GDB_DWARF2_SECTION_H
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#define GDB_DWARF2_SECTION_H
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/* A descriptor for dwarf sections.
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S.ASECTION, SIZE are typically initialized when the objfile is first
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scanned. BUFFER, READIN are filled in later when the section is read.
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If the section contained compressed data then SIZE is updated to record
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the uncompressed size of the section.
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DWP file format V2 introduces a wrinkle that is easiest to handle by
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creating the concept of virtual sections contained within a real section.
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In DWP V2 the sections of the input DWO files are concatenated together
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into one section, but section offsets are kept relative to the original
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input section.
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If this is a virtual dwp-v2 section, S.CONTAINING_SECTION is a backlink to
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the real section this "virtual" section is contained in, and BUFFER,SIZE
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describe the virtual section. */
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struct dwarf2_section_info
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{
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union
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{
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/* If this is a real section, the bfd section. */
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asection *section;
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/* If this is a virtual section, pointer to the containing ("real")
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section. */
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struct dwarf2_section_info *containing_section;
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} s;
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/* Pointer to section data, only valid if readin. */
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const gdb_byte *buffer;
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/* The size of the section, real or virtual. */
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bfd_size_type size;
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/* If this is a virtual section, the offset in the real section.
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Only valid if is_virtual. */
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bfd_size_type virtual_offset;
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/* True if we have tried to read this section. */
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bool readin;
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/* True if this is a virtual section, False otherwise.
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This specifies which of s.section and s.containing_section to use. */
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bool is_virtual;
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};
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/* Read the contents of the section INFO.
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OBJFILE is the main object file, but not necessarily the file where
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the section comes from. E.g., for DWO files the bfd of INFO is the bfd
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of the DWO file.
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If the section is compressed, uncompress it before returning. */
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extern void dwarf2_read_section (struct objfile *objfile,
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dwarf2_section_info *info);
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extern const char *get_section_name (const struct dwarf2_section_info *);
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extern const char *get_section_file_name (const struct dwarf2_section_info *);
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/* Return the containing section of virtual section SECTION. */
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extern struct dwarf2_section_info *get_containing_section
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(const struct dwarf2_section_info *section);
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/* Return the bfd owner of SECTION. */
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extern struct bfd *get_section_bfd_owner
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(const struct dwarf2_section_info *section);
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/* Return the bfd section of SECTION.
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Returns NULL if the section is not present. */
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extern asection *get_section_bfd_section
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(const struct dwarf2_section_info *section);
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/* Return the name of SECTION. */
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extern const char *get_section_name
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(const struct dwarf2_section_info *section);
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/* Return the name of the file SECTION is in. */
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extern const char *get_section_file_name
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(const struct dwarf2_section_info *section);
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/* Return the id of SECTION.
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Returns 0 if SECTION doesn't exist. */
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extern int get_section_id (const struct dwarf2_section_info *section);
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/* Return the flags of SECTION.
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SECTION (or containing section if this is a virtual section) must exist. */
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extern int get_section_flags (const struct dwarf2_section_info *section);
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extern int dwarf2_section_empty_p (const struct dwarf2_section_info *section);
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#endif /* GDB_DWARF2_SECTION_H */
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