gas: sframe: add support for .cfi_negate_ra_state

DW_CFA_AARCH64_negate_ra_state in aarch64 is multiplexed with
DW_CFA_GNU_window_save in the DWARF format.

Remove the common-empty-4 testcase because the generated SFrame section
will not be be empty anymore.  A relevant test will be added in a later
commit.

ChangeLog:

	* gas/gen-sframe.c (sframe_v1_set_fre_info): Add new argument
	for mangled_ra_p.
	(sframe_set_fre_info): Likewise.
	(output_sframe_row_entry): Handle mangled_ra_p.
	(sframe_row_entry_new): Reset mangled_ra_p.
	(sframe_row_entry_initialize): Initialize mangled_ra_p.
	(sframe_xlate_do_gnu_window_save): New definition.
	(sframe_do_cfi_insn): Handle DW_CFA_GNU_window_save.
	* gas/gen-sframe.h (struct sframe_row_entry): New member.
	(struct sframe_version_ops): Add a new argument for
	mangled_ra_p.
	* gas/testsuite/gas/cfi-sframe/cfi-sframe.exp: Remove test.
	* gas/testsuite/gas/cfi-sframe/common-empty-4.d: Removed.
	* gas/testsuite/gas/cfi-sframe/common-empty-4.s: Removed.

1 files changed, 5 insertions, 1 deletions

diff --git a/gas/gen-sframe.h b/gas/gen-sframe.h
index 93af499..5d5702a 100644
--- a/gas/gen-sframe.h
+++ b/gas/gen-sframe.h
@@ -50,6 +50,9 @@ struct sframe_row_entry
      on it.  */
   bool merge_candidate;
 
+  /* Whether the return address is mangled with pauth code.  */
+  bool mangled_ra_p;
+
   /* Track CFA base (architectural) register ID.  */
   unsigned int cfa_base_reg;
   /* Offset from the CFA base register for recovering CFA.  */
@@ -140,7 +143,8 @@ struct sframe_version_ops
 {
   unsigned char format_version;    /* SFrame format version.  */
   /* set SFrame FRE info.  */
-  unsigned char (*set_fre_info) (unsigned int, unsigned int, unsigned int);
+  unsigned char (*set_fre_info) (unsigned int, unsigned int, unsigned int,
+				 bool);
   /* set SFrame Func info.  */
   unsigned char (*set_func_info) (unsigned int, unsigned int);
 };