Add DW_CFA_AARCH64_negate_ra_state to dwarf2.def/h and dwarfnames.c

  A new vendor CFA DW_CFA_AARCH64_negate_ra_state was introduced for ARMv8.3-A
return address signing, it is multiplexing DW_CFA_GNU_window_save in CFA vendor
extension space.

  This patch adds necessary code to make it available to external, the GDB
patch (https://sourceware.org/ml/gdb-patches/2017-08/msg00215.html) is intended
to use it.

  A new DW_CFA_DUP for it is added in dwarf2.def.  The use of DW_CFA_DUP is to
avoid duplicated case value issue when included in libiberty/dwarfnames.

  Native x86 builds OK to make sure no macro expanding errors.

Committed on behalf of Jiong Wang.

    include/
	* dwarf2.def (DW_CFA_AARCH64_negate_ra_state): New DW_CFA_DUP.
	* dwarf2.h (DW_CFA_DUP): New define.

    libiberty/
	* dwarfnames.c (DW_CFA_DUP): New define.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@252037 138bc75d-0d04-0410-961f-82ee72b054a4

Author: wilco

include/ChangeLog

@@ -1,3 +1,8 @@
+2017-09-12  Jiong Wang  <[email protected]>
+
+	* dwarf2.def (DW_CFA_AARCH64_negate_ra_state): New DW_CFA_DUP.
+	* dwarf2.h (DW_CFA_DUP): New define.
+
 2017-08-21  Richard Biener  <[email protected]>
 
 	* simple-object.h (simple_object_copy_lto_debug_sections): New

include/dwarf2.def

@@ -778,6 +778,7 @@ DW_CFA (DW_CFA_MIPS_advance_loc8, 0x1d)
 /* GNU extensions.
    NOTE: DW_CFA_GNU_window_save is multiplexed on Sparc and AArch64.  */
 DW_CFA (DW_CFA_GNU_window_save, 0x2d)
+DW_CFA_DUP (DW_CFA_AARCH64_negate_ra_state, 0x2d)
 DW_CFA (DW_CFA_GNU_args_size, 0x2e)
 DW_CFA (DW_CFA_GNU_negative_offset_extended, 0x2f)
 

include/dwarf2.h

@@ -52,6 +52,7 @@
 #define DW_ATE(name, value) , name = value
 #define DW_ATE_DUP(name, value) , name = value
 #define DW_CFA(name, value) , name = value
+#define DW_CFA_DUP(name, value) , name = value
 #define DW_IDX(name, value) , name = value
 #define DW_IDX_DUP(name, value) , name = value
 
@@ -104,6 +105,7 @@
 #undef DW_ATE
 #undef DW_ATE_DUP
 #undef DW_CFA
+#undef DW_CFA_DUP
 #undef DW_IDX
 #undef DW_IDX_DUP
 

libiberty/ChangeLog

@@ -1,3 +1,7 @@
+2017-09-12  Jiong Wang  <[email protected]>
+
+	* dwarfnames.c (DW_CFA_DUP): New define.
+
 2017-09-01  Martin Liska  <[email protected]>
 
 	* simple-object-elf.c (simple_object_elf_copy_lto_debug_sections):

libiberty/dwarfnames.c

@@ -75,6 +75,7 @@ Boston, MA 02110-1301, USA.  */
 #define DW_ATE(name, value) case name: return # name ;
 #define DW_ATE_DUP(name, value)
 #define DW_CFA(name, value) case name: return # name ;
+#define DW_CFA_DUP(name, value)
 #define DW_IDX(name, value) case name: return # name ;
 #define DW_IDX_DUP(name, value)
 
@@ -105,5 +106,6 @@ Boston, MA 02110-1301, USA.  */
 #undef DW_ATE
 #undef DW_ATE_DUP
 #undef DW_CFA
+#undef DW_CFA_DUP
 #undef DW_IDX
 #undef DW_IDX_DUP