From: Zoran Zaric <Zoran.Zaric@amd.com>
Date: Mon, 7 Dec 2020 19:00:26 +0000 (+0000)
Subject: Add frame info check to DW_OP_reg operations
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b96b71276e5078fc5c03fc6e077fab548f0d3e9a;p=thirdparty%2Fbinutils-gdb.git

Add frame info check to DW_OP_reg operations

After enabling location description to be on a DWARF stack, it is now
needed to check the frame context information validity when creating a
register location description.

gdb/ChangeLog:

	* dwarf2/expr.c (dwarf_expr_context::execute_stack_op): Add
	check_frame_info call for DW_OP_reg operations.

Change-Id: I3e4a4d1eaba10b3b34be3c3bdbd1010a46ba4cd0
---

diff --git a/gdb/dwarf2/expr.c b/gdb/dwarf2/expr.c
index 9f2c77197a6..ee3732a6d97 100644
--- a/gdb/dwarf2/expr.c
+++ b/gdb/dwarf2/expr.c
@@ -2972,6 +2972,7 @@ dwarf_expr_context::execute_stack_op (const gdb_byte *op_ptr,
 	case DW_OP_reg30:
 	case DW_OP_reg31:
 	  dwarf_expr_require_composition (op_ptr, op_end, "DW_OP_reg");
+	  ensure_have_frame (this->frame, "DW_OP_reg");
 
 	  result = op - DW_OP_reg0;
 	  result_entry = entry_factory->create_register (result);
@@ -2980,6 +2981,7 @@ dwarf_expr_context::execute_stack_op (const gdb_byte *op_ptr,
 	case DW_OP_regx:
 	  op_ptr = safe_read_uleb128 (op_ptr, op_end, &reg);
 	  dwarf_expr_require_composition (op_ptr, op_end, "DW_OP_regx");
+	  ensure_have_frame (this->frame, "DW_OP_regx");
 
 	  result = reg;
 	  result_entry = entry_factory->create_register (reg);