[Qemu-devel] [PATCH v2 05/13] tcg-runtime: add lookup_tb_ptr helper

["Emilio G. Cota" <cota@braap.org>]

Signed-off-by: Emilio G. Cota <cota@braap.org>
---
 tcg-runtime.c     | 7 +++++++
 tcg/tcg-runtime.h | 2 ++
 tcg/tcg.h         | 1 +
 3 files changed, 10 insertions(+)

diff --git a/tcg-runtime.c b/tcg-runtime.c
index 4c60c96..f291184 100644
--- a/tcg-runtime.c
+++ b/tcg-runtime.c
@@ -141,6 +141,13 @@ uint64_t HELPER(ctpop_i64)(uint64_t arg)
     return ctpop64(arg);
 }
 
+void *HELPER(lookup_tb_ptr)(CPUArchState *env, target_ulong addr)
+{
+    TranslationBlock *tb = tb_from_jmp_cache(env, addr);
+
+    return tb ? tb->tc_ptr : tcg_ctx.code_gen_epilogue;
+}
+
 void HELPER(exit_atomic)(CPUArchState *env)
 {
     cpu_loop_exit_atomic(ENV_GET_CPU(env), GETPC());
diff --git a/tcg/tcg-runtime.h b/tcg/tcg-runtime.h
index 114ea6f..c41d38a 100644
--- a/tcg/tcg-runtime.h
+++ b/tcg/tcg-runtime.h
@@ -24,6 +24,8 @@ DEF_HELPER_FLAGS_1(clrsb_i64, TCG_CALL_NO_RWG_SE, i64, i64)
 DEF_HELPER_FLAGS_1(ctpop_i32, TCG_CALL_NO_RWG_SE, i32, i32)
 DEF_HELPER_FLAGS_1(ctpop_i64, TCG_CALL_NO_RWG_SE, i64, i64)
 
+DEF_HELPER_FLAGS_2(lookup_tb_ptr, TCG_CALL_NO_WG_SE, ptr, env, tl)
+
 DEF_HELPER_FLAGS_1(exit_atomic, TCG_CALL_NO_WG, noreturn, env)
 
 #ifdef CONFIG_SOFTMMU
diff --git a/tcg/tcg.h b/tcg/tcg.h
index b26f0ef..625e2aa 100644
--- a/tcg/tcg.h
+++ b/tcg/tcg.h
@@ -647,6 +647,7 @@ struct TCGContext {
         GHashTable *helpers;
 
         void *code_gen_prologue;
+        void *code_gen_epilogue;
         void *code_gen_buffer;
         size_t code_gen_buffer_size;
 
-- 
2.7.4