To be called from tcg generated code on hosts that support
unaligned accesses natively, in response to an access that
is supposed to be aligned.
Reviewed-by: Peter Maydell <peter.mayd...@linaro.org>
Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
---
include/tcg/tcg-ldst.h | 5 +++++
accel/tcg/user-exec.c | 11 +++++++++++
2 files changed, 16 insertions(+)
diff --git a/include/tcg/tcg-ldst.h b/include/tcg/tcg-ldst.h
index 8c86365611..bf40942de4 100644
--- a/include/tcg/tcg-ldst.h
+++ b/include/tcg/tcg-ldst.h
@@ -70,5 +70,10 @@ void helper_be_stl_mmu(CPUArchState *env, target_ulong addr,
uint32_t val,
void helper_be_stq_mmu(CPUArchState *env, target_ulong addr, uint64_t val,
MemOpIdx oi, uintptr_t retaddr);
+#else
+
+void QEMU_NORETURN helper_unaligned_ld(CPUArchState *env, target_ulong addr);
+void QEMU_NORETURN helper_unaligned_st(CPUArchState *env, target_ulong addr);
+
#endif /* CONFIG_SOFTMMU */
#endif /* TCG_LDST_H */
diff --git a/accel/tcg/user-exec.c b/accel/tcg/user-exec.c
index 7d50dd54f6..0473ead5ab 100644
--- a/accel/tcg/user-exec.c
+++ b/accel/tcg/user-exec.c
@@ -27,6 +27,7 @@
#include "exec/helper-proto.h"
#include "qemu/atomic128.h"
#include "trace/trace-root.h"
+#include "tcg/tcg-ldst.h"
#include "internal.h"
__thread uintptr_t helper_retaddr;
@@ -217,6 +218,16 @@ static void validate_memop(MemOpIdx oi, MemOp expected)
#endif
}
+void helper_unaligned_ld(CPUArchState *env, target_ulong addr)
+{
+ cpu_loop_exit_sigbus(env_cpu(env), addr, MMU_DATA_LOAD, GETPC());
+}
+
+void helper_unaligned_st(CPUArchState *env, target_ulong addr)
+{
+ cpu_loop_exit_sigbus(env_cpu(env), addr, MMU_DATA_STORE, GETPC());
+}
+
static void *cpu_mmu_lookup(CPUArchState *env, target_ulong addr,
MemOpIdx oi, uintptr_t ra, MMUAccessType type)
{
--
2.25.1
