x86: Add -z cet-report=[none|warning|error]

Add -z cet-report=[none|warning|error] to report the missing Intel
Indirect Branch Tracking (IBT) and Shadow Stack (SHSTK) properties
in input .note.gnu.property section.  -z cet-report=none, which is
the default, will make the linker not report missing properties in
input files.  -z cet-report=warning will make the linker issue a
warning for missing properties in input files.  -z cet-report=error
will make the linker issue an error for missing properties in input
files.  Note that -z ibt will turn off the missing IBT property report
and -z shstk will turn off the missing SHSTK property report.
Supported for Linux/i386 and Linux/x86_64.

bfd/

	* elf-linker-x86.h (elf_x86_cet_report): New.
	(elf_linker_x86_params): Add cet_report.
	* elfxx-x86.c (_bfd_x86_elf_link_setup_gnu_properties): Report
	missing IBT and SHSTK properties if needed.

ld/

	* ld.texi: Document -z cet-report=[none|warning|error].
	* emulparams/cet.sh: Add -z cet-report=[none|warning|error].
	* testsuite/ld-i386/i386.exp: Run -z cet-report=[warning|error]
	tests.
	* testsuite/ld-x86-64/x86-64.exp: Likewise.
	* testsuite/ld-i386/property-x86-cet1.d: New file.
	* testsuite/ld-i386/property-x86-cet2a.d: Likewise.
	* testsuite/ld-i386/property-x86-cet2b.d: Likewise.
	* testsuite/ld-i386/property-x86-cet3a.d: Likewise.
	* testsuite/ld-i386/property-x86-cet3b.d: Likewise.
	* testsuite/ld-i386/property-x86-cet4a.d: Likewise.
	* testsuite/ld-i386/property-x86-cet4b.d: Likewise.
	* testsuite/ld-i386/property-x86-cet5a.d: Likewise.
	* testsuite/ld-i386/property-x86-cet5b.d: Likewise.
	* testsuite/ld-i386/property-x86-cet6.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet.s: Likewise.
	* testsuite/ld-x86-64/property-x86-cet1-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet1.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet2a-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet2a.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet2b-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet2b.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet3a-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet3a.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet3b-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet3b.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet4a-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet4a.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet4b-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet4b.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet5a-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet5a.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet5b-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet5b.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet6-x32.d: Likewise.
	* testsuite/ld-x86-64/property-x86-cet6.d: Likewise.

1 files changed, 19 insertions, 0 deletions

diff --git a/ld/emulparams/cet.sh b/ld/emulparams/cet.sh
index 1d45b16..f9a83ec 100644
--- a/ld/emulparams/cet.sh
+++ b/ld/emulparams/cet.sh
@@ -5,6 +5,9 @@ PARSE_AND_LIST_OPTIONS_CET='
   -z ibt                      Generate GNU_PROPERTY_X86_FEATURE_1_IBT\n"));
   fprintf (file, _("\
   -z shstk                    Generate GNU_PROPERTY_X86_FEATURE_1_SHSTK\n"));
+  fprintf (file, _("\
+  -z cet-report=[none|warning|error] (default: none)\n\
+                              Report missing IBT and SHSTK properties\n"));
 '
 PARSE_AND_LIST_ARGS_CASE_Z_CET='
       else if (strcmp (optarg, "ibtplt") == 0)
@@ -13,6 +16,22 @@ PARSE_AND_LIST_ARGS_CASE_Z_CET='
 	params.ibt = TRUE;
       else if (strcmp (optarg, "shstk") == 0)
 	params.shstk = TRUE;
+      else if (strncmp (optarg, "cet-report=", 11) == 0)
+	{
+	  if (strcmp (optarg + 11, "none") == 0)
+	    params.cet_report = cet_report_none;
+	  else if (strcmp (optarg + 11, "warning") == 0)
+	    params.cet_report = (cet_report_warning
+				 | cet_report_ibt
+				 | cet_report_shstk);
+	  else if (strcmp (optarg + 11, "error") == 0)
+	    params.cet_report = (cet_report_error
+				 | cet_report_ibt
+				 | cet_report_shstk);
+	  else
+	    einfo (_("%F%P: invalid option for -z cet-report=: %s\n"),
+		   optarg + 11);
+	}
 '
 
 PARSE_AND_LIST_OPTIONS="$PARSE_AND_LIST_OPTIONS $PARSE_AND_LIST_OPTIONS_CET"