PR 26829
* dwarf.c (struct dwo_info): Add cu_offset field.
(add_dwo_info): Add cu_offset parameter. Record in new dwo_info
struct.
(add_dwo_name): Add cu_offset field.
(add_dwo_dir): Add cu_offset field.
(add_dwo_id): Add cu_offset field.
(read_and_display_attr_value): Pass cu_offset to dwo recording
functions.
(load_separate_debug_files): Accumulate name, dir and id values
and display once for each CU.
* testsuite/binutils-all/dwo.sL Use a separate CU for the second
dwo link.
* testsuite/binutils-all/readelf.k2: Update expected output.
* dwarf.c (dwo_name, dwo_dir, dwo_id, dwo_id_len): New variables.
(read_and_display_attr_value): Record dwo variables if requested.
(display_augmentation_data): Rename to display_data and make
generic.
(load_dwo_file): New function. Loads a separate dwarf object
file.
(load_separate_debug_file): Add reporting and loading of separate
dwarf objet files.
* readelf.c (process_section_headers): Add do_debug_links to list
of flags requiring a debug dump.
(display_debug_section): Tidy up code.
* doc/debug.options.texi: Add note that dwo links will also be
followed.
* testsuite/binutils-all/debuglink.s: Tidy code.
* testsuite/binutils-all/dwo.s: New test file.
* testsuite/binutils-all/readelf.wk2: New file - expected output
from readelf.
* testsuite/binutils-all/readelf.exp: Run the new test.
