kern: add speculation barriers after eret

2023-10-11 03:21:06 -07:00
parent 9e99f36d7c
commit b9a4c2bdba
6 changed files with 22 additions and 19 deletions
--- a/libraries/libmesosphere/include/mesosphere/arch/arm64/kern_assembly_macros.h
+++ b/libraries/libmesosphere/include/mesosphere/arch/arm64/kern_assembly_macros.h
@@ -94,3 +94,8 @@ label_done:
    ENABLE_FPU(xtmp1)                                                           \
    GET_THREAD_CONTEXT_AND_RESTORE_FPCR_FPSR(ctx, xtmp1, xtmp2, wtmp1, wtmp2) \
    RESTORE_FPU32_ALL_REGISTERS(ctx, xtmp1)
+
+#define ERET_WITH_SPECULATION_BARRIER \
+    eret;                             \
+    dsb nsh;                          \
+    isb