[gcc r11-3447] libiberty: Add get_DW_UT_name and update include/dwarf2.{def, h}

[gcc r11-3447] libiberty: Add get_DW_UT_name and update include/dwarf2.{def, h}

[Mark Wielaard]

https://gcc.gnu.org/g:942ab9e9d4ff1da711daad3e8c71c57fd4c14035

commit r11-3447-g942ab9e9d4ff1da711daad3e8c71c57fd4c14035
Author: Mark Wielaard <mark@klomp.org>
Date:   Wed Sep 23 16:10:41 2020 +0200

    libiberty: Add get_DW_UT_name and update include/dwarf2.{def,h}
    
    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.
    
    Also remove DW_CIE_VERSION which was already removed in binutils/gdb
    and is not used in gcc.
    
    include/ChangeLog:
    
            * 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.
            (DW_CIE_VERSION): Removed.
            (get_DW_UT_name): New function declaration.
    
    libiberty/ChangeLog:
    
            * dwarfnames.c (get_DW_UT_name): Define using DW_UT_FIRST, DW_UT
            and DW_UT_END.

Diff:
---
 include/dwarf2.def     | 11 +++++++++++
 include/dwarf2.h       | 25 +++++++++++--------------
 libiberty/dwarfnames.c |  7 +++++++
 3 files changed, 29 insertions(+), 14 deletions(-)

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 34273e84a5a..83cf50d7bf5 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
@@ -316,7 +323,6 @@ enum dwarf_location_list_entry_type
 
 #define DW_CIE_ID	  0xffffffff
 #define DW64_CIE_ID	  0xffffffffffffffffULL
-#define DW_CIE_VERSION	  1
 
 #define DW_CFA_extended   0
 
@@ -451,19 +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
-  };
 \f
 /* @@@ For use with GNU frame unwind information.  */
 
@@ -552,6 +545,10 @@ 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/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