Changeset 102977 in vbox for trunk/src/VBox/VMM/VMMAll/IEMAllAImpl-arm64.S

Timestamp:

Jan 19, 2024 11:11:30 PM (13 months ago)

Author:

vboxsync

Message:

VMM/IEM: Implemented generic fallback for misaligned x86 locking that is not compatible with the host. Using the existing split-lock solution with VINF_EM_EMULATE_SPLIT_LOCK from bugref:10052. We keep ignoring the 'lock' prefix in the recompiler for single CPU VMs (now also on amd64 hosts). bugref:10547

File:

• trunk/src/VBox/VMM/VMMAll/IEMAllAImpl-arm64.S (modified) (1 diff)

trunk/src/VBox/VMM/VMMAll/IEMAllAImpl-arm64.S

@@ -38 +38 @@
         ret
 
+/* Some sketches.
+
+// IEM_DECL_IMPL_DEF(void, iemAImpl_xchg_u8_locked, (uint8_t  *pu8Mem,  uint8_t  *pu8Reg));
+        .p2align        2
+        .private_extern NAME(iemAImpl_xchg_u8_locked)
+        .globl          NAME(iemAImpl_xchg_u8_locked)
+NAME(iemAImpl_xchg_u8_locked):
+        ldrb    w2, [x1]
+        swpalb  w2, w2, [x0]
+        strb    w2, [x1]
+        ret
+
+// IEM_DECL_IMPL_DEF(void, iemAImpl_xchg_u16_locked,(uint16_t *pu16Mem, uint16_t *pu16Reg));
+        .p2align        2
+        .private_extern NAME(iemAImpl_xchg_u16_locked)
+        .globl          NAME(iemAImpl_xchg_u16_locked)
+NAME(iemAImpl_xchg_u16_locked):
+        ldrh    w2, [x1]
+        swpalh  w2, w2, [x0]
+        strh    w2, [x1]
+        ret
+
+// IEM_DECL_IMPL_DEF(void, iemAImpl_xchg_u32_locked,(uint32_t *pu32Mem, uint32_t *pu32Reg));
+// IEM_DECL_IMPL_DEF(void, iemAImpl_xchg_u64_locked,(uint64_t *pu64Mem, uint64_t *pu64Reg));
+
+*/