Changeset 159c1525 in mainline

Timestamp:

2018-11-13T16:08:22Z (5 years ago)

Author:

Jiří Zárevúcky <zarevucky.jiri@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

780edc7, b60615b

Parents:

cbf528f

Message:

may_alias attribute is not sufficient to avoid ubsan report

File:

• kernel/genarch/src/acpi/acpi.c (modified) (1 diff)

kernel/genarch/src/acpi/acpi.c

@@ -171 +171 @@
 }
 
-typedef uint64_t _a64_t __attribute__((may_alias));
-
 static uint8_t *search_rsdp(uint8_t *base, size_t len)
 {
-        uint64_t signature = *(_a64_t *) RSDP_SIGNATURE;
-
         for (size_t i = 0; i < len; i += 16) {
-                if (*((_a64_t *) &base[i]) == signature && rsdp_check(&base[i]))
+                if (__builtin_memcmp(&base[i], RSDP_SIGNATURE, 8) &&
+                    rsdp_check(&base[i]))
                         return &base[i];
         }