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-rw-r--r--plat/common/ubsan.c220
1 files changed, 220 insertions, 0 deletions
diff --git a/plat/common/ubsan.c b/plat/common/ubsan.c
new file mode 100644
index 0000000..45b0f7c
--- /dev/null
+++ b/plat/common/ubsan.c
@@ -0,0 +1,220 @@
+/*
+ * Copyright (c) 2016, Linaro Limited
+ * Copyright (c) 2019, ARM Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <arch_helpers.h>
+#include <context.h>
+#include <common/debug.h>
+#include <plat/common/platform.h>
+
+struct source_location {
+ const char *file_name;
+ uint32_t line;
+ uint32_t column;
+};
+
+struct type_descriptor {
+ uint16_t type_kind;
+ uint16_t type_info;
+ char type_name[1];
+};
+
+struct type_mismatch_data {
+ struct source_location loc;
+ struct type_descriptor *type;
+ unsigned long alignment;
+ unsigned char type_check_kind;
+};
+
+struct overflow_data {
+ struct source_location loc;
+ struct type_descriptor *type;
+};
+
+struct shift_out_of_bounds_data {
+ struct source_location loc;
+ struct type_descriptor *lhs_type;
+ struct type_descriptor *rhs_type;
+};
+
+struct out_of_bounds_data {
+ struct source_location loc;
+ struct type_descriptor *array_type;
+ struct type_descriptor *index_type;
+};
+
+struct unreachable_data {
+ struct source_location loc;
+};
+
+struct vla_bound_data {
+ struct source_location loc;
+ struct type_descriptor *type;
+};
+
+struct invalid_value_data {
+ struct source_location loc;
+ struct type_descriptor *type;
+};
+
+struct nonnull_arg_data {
+ struct source_location loc;
+};
+
+/*
+ * When compiling with -fsanitize=undefined the compiler expects functions
+ * with the following signatures. The functions are never called directly,
+ * only when undefined behavior is detected in instrumented code.
+ */
+void __ubsan_handle_type_mismatch_abort(struct type_mismatch_data *data,
+ unsigned long ptr);
+void __ubsan_handle_type_mismatch_v1_abort(struct type_mismatch_data *data,
+ unsigned long ptr);
+void __ubsan_handle_add_overflow_abort(struct overflow_data *data,
+ unsigned long lhs, unsigned long rhs);
+void __ubsan_handle_sub_overflow_abort(struct overflow_data *data,
+ unsigned long lhs, unsigned long rhs);
+void __ubsan_handle_mul_overflow_abort(struct overflow_data *data,
+ unsigned long lhs, unsigned long rhs);
+void __ubsan_handle_negate_overflow_abort(struct overflow_data *data,
+ unsigned long old_val);
+void __ubsan_handle_pointer_overflow_abort(struct overflow_data *data,
+ unsigned long old_val);
+void __ubsan_handle_divrem_overflow_abort(struct overflow_data *data,
+ unsigned long lhs, unsigned long rhs);
+void __ubsan_handle_shift_out_of_bounds_abort(struct shift_out_of_bounds_data *data,
+ unsigned long lhs, unsigned long rhs);
+void __ubsan_handle_out_of_bounds_abort(struct out_of_bounds_data *data,
+ unsigned long idx);
+void __ubsan_handle_unreachable_abort(struct unreachable_data *data);
+void __ubsan_handle_missing_return_abort(struct unreachable_data *data);
+void __ubsan_handle_vla_bound_not_positive_abort(struct vla_bound_data *data,
+ unsigned long bound);
+void __ubsan_handle_load_invalid_value_abort(struct invalid_value_data *data,
+ unsigned long val);
+void __ubsan_handle_nonnull_arg_abort(struct nonnull_arg_data *data
+#if __GCC_VERSION < 60000
+ , size_t arg_no
+#endif
+ );
+
+static void print_loc(const char *func, struct source_location *loc)
+{
+ ERROR("Undefined behavior at %s:%d col %d (%s)",
+ loc->file_name, loc->line, loc->column, func);
+}
+
+
+void __ubsan_handle_type_mismatch_abort(struct type_mismatch_data *data,
+ unsigned long ptr __unused)
+{
+ print_loc(__func__, &data->loc);
+ plat_panic_handler();
+}
+
+void __ubsan_handle_type_mismatch_v1_abort(struct type_mismatch_data *data,
+ unsigned long ptr __unused)
+{
+ print_loc(__func__, &data->loc);
+ plat_panic_handler();
+}
+
+void __ubsan_handle_add_overflow_abort(struct overflow_data *data,
+ unsigned long lhs __unused,
+ unsigned long rhs __unused)
+{
+ print_loc(__func__, &data->loc);
+ plat_panic_handler();
+}
+
+void __ubsan_handle_sub_overflow_abort(struct overflow_data *data,
+ unsigned long lhs __unused,
+ unsigned long rhs __unused)
+{
+ print_loc(__func__, &data->loc);
+ plat_panic_handler();
+}
+
+void __ubsan_handle_mul_overflow_abort(struct overflow_data *data,
+ unsigned long lhs __unused,
+ unsigned long rhs __unused)
+{
+ print_loc(__func__, &data->loc);
+ plat_panic_handler();
+}
+
+void __ubsan_handle_negate_overflow_abort(struct overflow_data *data,
+ unsigned long old_val __unused)
+{
+ print_loc(__func__, &data->loc);
+ plat_panic_handler();
+}
+
+void __ubsan_handle_pointer_overflow_abort(struct overflow_data *data,
+ unsigned long old_val __unused)
+{
+ print_loc(__func__, &data->loc);
+ plat_panic_handler();
+}
+
+void __ubsan_handle_divrem_overflow_abort(struct overflow_data *data,
+ unsigned long lhs __unused,
+ unsigned long rhs __unused)
+{
+ print_loc(__func__, &data->loc);
+ plat_panic_handler();
+}
+
+void __ubsan_handle_shift_out_of_bounds_abort(struct shift_out_of_bounds_data *data,
+ unsigned long lhs __unused,
+ unsigned long rhs __unused)
+{
+ print_loc(__func__, &data->loc);
+ plat_panic_handler();
+}
+
+void __ubsan_handle_out_of_bounds_abort(struct out_of_bounds_data *data,
+ unsigned long idx __unused)
+{
+ print_loc(__func__, &data->loc);
+ plat_panic_handler();
+}
+
+void __ubsan_handle_unreachable_abort(struct unreachable_data *data)
+{
+ print_loc(__func__, &data->loc);
+ plat_panic_handler();
+}
+
+void __ubsan_handle_missing_return_abort(struct unreachable_data *data)
+{
+ print_loc(__func__, &data->loc);
+ plat_panic_handler();
+}
+
+void __ubsan_handle_vla_bound_not_positive_abort(struct vla_bound_data *data,
+ unsigned long bound __unused)
+{
+ print_loc(__func__, &data->loc);
+ plat_panic_handler();
+}
+
+void __ubsan_handle_load_invalid_value_abort(struct invalid_value_data *data,
+ unsigned long val __unused)
+{
+ print_loc(__func__, &data->loc);
+ plat_panic_handler();
+}
+
+void __ubsan_handle_nonnull_arg_abort(struct nonnull_arg_data *data
+#if __GCC_VERSION < 60000
+ , size_t arg_no __unused
+#endif
+ )
+{
+ print_loc(__func__, &data->loc);
+ plat_panic_handler();
+}