Changes in kernel/arch/amd64/src/syscall.c [1d3d2cf:e13daa5d] in mainline

File:

• kernel/arch/amd64/src/syscall.c (modified) (2 diffs)

kernel/arch/amd64/src/syscall.c

@@ -58 +58 @@
          */
         write_msr(AMD_MSR_STAR,
-            ((uint64_t) (GDT_SELECTOR(KDATA_DES) | PL_USER) << 48) |
-            ((uint64_t) (GDT_SELECTOR(KTEXT_DES) | PL_KERNEL) << 32));
+            ((uint64_t)(gdtselector(KDATA_DES) | PL_USER) << 48) |
+            ((uint64_t)(gdtselector(KTEXT_DES) | PL_KERNEL) << 32));
         write_msr(AMD_MSR_LSTAR, (uint64_t)syscall_entry);
         /* Mask RFLAGS on syscall 
@@ -66 +66 @@
          * - clear DF so that the string instructions operate in
          *   the right direction
-         * - clear NT to prevent a #GP should the flag proliferate to an IRET
          */
-        write_msr(AMD_MSR_SFMASK, RFLAGS_IF | RFLAGS_DF | RFLAGS_NT);
+        write_msr(AMD_MSR_SFMASK, RFLAGS_IF | RFLAGS_DF);
 }