[PATCH 2/3] GDB: Add support for 24 bit addresses

[John Darrington <john@darrington.wattle.id.au>]

* include/dwarf2.h (enum dwarf_unit_type)[DW_EH_PE_udata3]: New member.
* gdb/dwarf2-frame.c (encoding_for_size): Deal with case 3.
	    (read_encoded_value): Deal with case DW_EH_PE_udata3
---
 gdb/dwarf2-frame.c | 7 ++++++-
 include/dwarf2.h   | 5 ++++-
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/gdb/dwarf2-frame.c b/gdb/dwarf2-frame.c
index f7dc820f4d..b329e34997 100644
--- a/gdb/dwarf2-frame.c
+++ b/gdb/dwarf2-frame.c
@@ -1527,12 +1527,14 @@ encoding_for_size (unsigned int size)
     {
     case 2:
       return DW_EH_PE_udata2;
+    case 3:
+      return DW_EH_PE_udata3;
     case 4:
       return DW_EH_PE_udata4;
     case 8:
       return DW_EH_PE_udata8;
     default:
-      internal_error (__FILE__, __LINE__, _("Unsupported address size"));
+      internal_error (__FILE__, __LINE__, _("Unsupported address size %d"), size);
     }
 }
 
@@ -1605,6 +1607,9 @@ read_encoded_value (struct comp_unit *unit, gdb_byte encoding,
     case DW_EH_PE_udata2:
       *bytes_read_ptr += 2;
       return (base + bfd_get_16 (unit->abfd, (bfd_byte *) buf));
+    case DW_EH_PE_udata3:
+      *bytes_read_ptr += 3;
+      return (base + bfd_get_24 (unit->abfd, (bfd_byte *) buf));
     case DW_EH_PE_udata4:
       *bytes_read_ptr += 4;
       return (base + bfd_get_32 (unit->abfd, (bfd_byte *) buf));
diff --git a/include/dwarf2.h b/include/dwarf2.h
index cf0039a92a..05c328057b 100644
--- a/include/dwarf2.h
+++ b/include/dwarf2.h
@@ -474,11 +474,14 @@ enum dwarf_unit_type
 #define DW_EH_PE_udata2		0x02
 #define DW_EH_PE_udata4		0x03
 #define DW_EH_PE_udata8		0x04
+
+#define DW_EH_PE_udata3		0x05
+
+#define DW_EH_PE_signed		0x08
 #define DW_EH_PE_sleb128	0x09
 #define DW_EH_PE_sdata2		0x0A
 #define DW_EH_PE_sdata4		0x0B
 #define DW_EH_PE_sdata8		0x0C
-#define DW_EH_PE_signed		0x08
 
 #define DW_EH_PE_pcrel		0x10
 #define DW_EH_PE_textrel	0x20
-- 
2.11.0