Sync libiberty and include with GCC for get_DW_UT_name.

This adds a get_DW_UT_name function to dwarfnames using dwarf2.def
for use in binutils readelf to show the unit types in a DWARF5 header.

include/ChangeLog:

	Sync with GCC
	* dwarf2.def: Add DWARF5 Unit type header encoding macros
	DW_UT_FIRST, DW_UT and DW_UT_END.
	* dwarf2.h (enum dwarf_unit_type): Removed and define using
	DW_UT_FIRST, DW_UT and DW_UT_END macros.
	(get_DW_UT_name): New function declaration.

libiberty/ChangeLog:

	Sync with GCC
	* dwarfnames.c (get_DW_UT_name): Define using DW_UT_FIRST, DW_UT
	and DW_UT_END.

(cherry picked from commit d7b477c541bd31045483f37345727bd8335a052a)
(cherry picked from commit d89b66edf5baac6febf636c130c9a1b748c0ce97)

5 files changed, 50 insertions, 13 deletions

diff --git a/include/ChangeLog b/include/ChangeLog
index acdd85fc4df..5997c26899c 100644
--- a/include/ChangeLog
+++ b/include/ChangeLog
@@ -1,3 +1,15 @@
+2020-11-15  Mark Wielaard  <mark@klomp.org>
+
+	Backport from the mainline:
+	2020-09-23  Mark Wielaard  <mark@klomp.org>
+
+	Sync with GCC
+	* dwarf2.def: Add DWARF5 Unit type header encoding macros
+	DW_UT_FIRST, DW_UT and DW_UT_END.
+	* dwarf2.h (enum dwarf_unit_type): Removed and define using
+	DW_UT_FIRST, DW_UT and DW_UT_END macros.
+	(get_DW_UT_name): New function declaration.
+
 2020-07-22  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR ld/26262
diff --git a/include/dwarf2.def b/include/dwarf2.def
index d8a8cce7947..13825a3eef7 100644
--- a/include/dwarf2.def
+++ b/include/dwarf2.def
@@ -805,3 +805,14 @@ DW_IDX (DW_IDX_hi_user, 0x3fff)
 DW_IDX (DW_IDX_GNU_internal, 0x2000)
 DW_IDX (DW_IDX_GNU_external, 0x2001)
 DW_END_IDX
+
+/* DWARF5 Unit type header encodings  */
+DW_FIRST_UT (DW_UT_compile, 0x01)
+DW_UT (DW_UT_type, 0x02)
+DW_UT (DW_UT_partial, 0x03)
+DW_UT (DW_UT_skeleton, 0x04)
+DW_UT (DW_UT_split_compile, 0x05)
+DW_UT (DW_UT_split_type, 0x06)
+DW_UT (DW_UT_lo_user, 0x80)
+DW_UT (DW_UT_hi_user, 0xff)
+DW_END_UT
diff --git a/include/dwarf2.h b/include/dwarf2.h
index 882453dce08..3f271fb0f7a 100644
--- a/include/dwarf2.h
+++ b/include/dwarf2.h
@@ -55,6 +55,7 @@
 #define DW_CFA_DUP(name, value) , name = value
 #define DW_IDX(name, value) , name = value
 #define DW_IDX_DUP(name, value) , name = value
+#define DW_UT(name, value) , name = value
 
 #define DW_FIRST_TAG(name, value) enum dwarf_tag { \
   name = value
@@ -77,6 +78,9 @@
 #define DW_FIRST_IDX(name, value) enum dwarf_name_index_attribute { \
   name = value
 #define DW_END_IDX };
+#define DW_FIRST_UT(name, value) enum dwarf_unit_type { \
+  name = value
+#define DW_END_UT };
 
 #include "dwarf2.def"
 
@@ -94,6 +98,8 @@
 #undef DW_END_CFA
 #undef DW_FIRST_IDX
 #undef DW_END_IDX
+#undef DW_FIRST_UT
+#undef DW_END_UT
 
 #undef DW_TAG
 #undef DW_TAG_DUP
@@ -108,6 +114,7 @@
 #undef DW_CFA_DUP
 #undef DW_IDX
 #undef DW_IDX_DUP
+#undef DW_UT
 
 /* Flag that tells whether entry has a child or not.  */
 #define DW_children_no   0
@@ -450,19 +457,6 @@ enum dwarf_range_list_entry
     DW_RLE_start_end = 0x06,
     DW_RLE_start_length = 0x07
   };
-
-/* Unit types in unit_type unit header field.  */
-enum dwarf_unit_type
-  {
-    DW_UT_compile = 0x01,
-    DW_UT_type = 0x02,
-    DW_UT_partial = 0x03,
-    DW_UT_skeleton = 0x04,
-    DW_UT_split_compile = 0x05,
-    DW_UT_split_type = 0x06,
-    DW_UT_lo_user = 0x80,
-    DW_UT_hi_user = 0xff
-  };
 
 /* @@@ For use with GNU frame unwind information.  */
 
@@ -534,6 +528,10 @@ extern const char *get_DW_CFA_name (unsigned int opc);
    recognized.  */
 extern const char *get_DW_IDX_name (unsigned int idx);
 
+/* Return the name of a DW_UT_ constant, or NULL if the value is not
+   recognized.  */
+extern const char *get_DW_UT_name (unsigned int ut);
+
 #ifdef __cplusplus
 }
 #endif /* __cplusplus */
diff --git a/libiberty/ChangeLog b/libiberty/ChangeLog
index 19d2b702d62..42daff15948 100644
--- a/libiberty/ChangeLog
+++ b/libiberty/ChangeLog
@@ -1,3 +1,12 @@
+2020-11-15  Mark Wielaard  <mark@klomp.org>
+
+	Backport from the mainline:
+	2020-09-23  Mark Wielaard  <mark@klomp.org>
+
+	Sync with GCC
+	* dwarfnames.c (get_DW_UT_name): Define using DW_UT_FIRST, DW_UT
+	and DW_UT_END.
+
 2020-06-23  Nick Alcock  <nick.alcock@oracle.com>
 
 	* bsearch_r.c: New file.
diff --git a/libiberty/dwarfnames.c b/libiberty/dwarfnames.c
index 968d1917532..af11668b431 100644
--- a/libiberty/dwarfnames.c
+++ b/libiberty/dwarfnames.c
@@ -64,6 +64,11 @@ Boston, MA 02110-1301, USA.  */
   switch (idx) {					\
   DW_IDX (name, value)
 #define DW_END_IDX } return 0; }
+#define DW_FIRST_UT(name, value) \
+  const char *get_DW_UT_name (unsigned int ut) {	\
+  switch (ut) {					\
+  DW_UT (name, value)
+#define DW_END_UT } return 0; }
 
 #define DW_TAG(name, value) case name: return # name ;
 #define DW_TAG_DUP(name, value)
@@ -78,6 +83,7 @@ Boston, MA 02110-1301, USA.  */
 #define DW_CFA_DUP(name, value)
 #define DW_IDX(name, value) case name: return # name ;
 #define DW_IDX_DUP(name, value)
+#define DW_UT(name, value) case name: return # name ;
 
 #include "dwarf2.def"
 
@@ -95,6 +101,7 @@ Boston, MA 02110-1301, USA.  */
 #undef DW_END_CFA
 #undef DW_FIRST_IDX
 #undef DW_END_IDX
+#undef DW_END_UT
 
 #undef DW_TAG
 #undef DW_TAG_DUP