[PATCH] gdb: Support DW_LLE_start_end

[Andreas Schwab <schwab@suse.de>]

Without that it is impossible to debug on riscv64.

gdb/
	PR symtab/27999
	* dwarf2/loc.c (decode_debug_loclists_addresses): Support
	DW_LLE_start_end.
---
 gdb/dwarf2/loc.c | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/gdb/dwarf2/loc.c b/gdb/dwarf2/loc.c
index b7e30e3cb4a..d57cdc165ba 100644
--- a/gdb/dwarf2/loc.c
+++ b/gdb/dwarf2/loc.c
@@ -255,9 +255,27 @@ decode_debug_loclists_addresses (dwarf2_per_cu_data *per_cu,
       *new_ptr = loc_ptr;
       return DEBUG_LOC_OFFSET_PAIR;
 
+    case DW_LLE_start_end:
+      if (loc_ptr + 2 * addr_size > buf_end)
+	return DEBUG_LOC_BUFFER_OVERFLOW;
+
+      if (signed_addr_p)
+	*low = extract_signed_integer (loc_ptr, addr_size, byte_order);
+      else
+	*low = extract_unsigned_integer (loc_ptr, addr_size, byte_order);
+
+      loc_ptr += addr_size;
+      if (signed_addr_p)
+	*high = extract_signed_integer (loc_ptr, addr_size, byte_order);
+      else
+	*high = extract_unsigned_integer (loc_ptr, addr_size, byte_order);
+
+      loc_ptr += addr_size;
+      *new_ptr = loc_ptr;
+      return DEBUG_LOC_START_END;
+
     /* Following cases are not supported yet.  */
     case DW_LLE_startx_endx:
-    case DW_LLE_start_end:
     case DW_LLE_default_location:
     default:
       return DEBUG_LOC_INVALID_ENTRY;
-- 
2.31.1


-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE  1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."