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Change the readelf and objdump programs so that they will automatically follow links to separate debug info files.

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* configure.ac (follow-debug-links): Add option to enable or
	disable the following of debug links by default.  Set the
	default for the option to be 'follow'.
	* dwarf.c (do_follow_links): Initialise with DEFAULT_FOR_FOLLOW_LINKS.
	(dwarf_select_sections_by_names): Add no-follow-links option.
	(dwarf_select_sections_by_letter): Add 'N' option.
	* objdump.c (usage): Add conditional text describing the
	follow links option.
	(slurp_symtab): Ensure that there is a NULL entry at the end
	of the symbol table.
	(slurp_dynamic_symtab): Likewise.
	(dump_bfd): When extending the symbol table, ensure that there
	is still a NULL entry at the end.
	* readelf.c (usage): Add conditional text describing the
	follow links option.
	* doc/binutils.texi: Update documentation for objcopy and
	readelf.
	* doc/debug.options.texi: Update documentation of the
	follow-links option.
	* config.in: Regenerate.
	* configure: Regenerate.
	* testsuite/binutils-all/compress.exp: Add the -WN option to
	objdump command lines that are not expecting to follow links.
	* testsuite/binutils-all/readelf.exp: Add the
	--debug-dump=no-follow-links option to tests that are not
	expecting to follow debug links.

gas	* testsuite/gas/mach-o/sections-1.d: Stop automatic debug link
        following.
	* testsuite/gas/xgate/insns-dwarf2.d: Likewise.

ld	* testsuite/ld-elf/sec64k.exp: Stop readelf from automatically
	following debug links.
This commit is contained in:
Nick Clifton
2021-02-12 14:52:22 +00:00
parent 96df3e28b8
commit c46b706620
18 changed files with 183 additions and 47 deletions
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11
binutils/doc/debug.options.texi
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@ -61,6 +61,17 @@ In addition, when displaying DWARF attributes, if a form is found that
references the separate debug info file, then the referenced contents
will also be displayed.
Note - in some distributions this option is enabled by default. It
can be disabled via the @option{N} debug option. The default can be
chosen when configuring the binutils via the
@option{--enable-follow-debug-links=yes} or
@option{--enable-follow-debug-links=no} options. If these are not
used then the default is to enable the following of debug links.
@item N
@itemx =no-follow-links
Disables the following of links to separate debug info files.
@item l
@itemx =rawline
Displays the contents of the @samp{.debug_line} section in a raw