tcg/mips: Implement field extraction opcodes

[mirror_qemu.git] / tcg / tcg-be-ldst.h

diff --git a/tcg/tcg-be-ldst.h b/tcg/tcg-be-ldst.h
index 40a2369b7c96fac9fbcb0447c7a94564f2678285..17777aec5a6673d324fb46d63b8f1162f1219508 100644 (file)
--- a/tcg/tcg-be-ldst.h
+++ b/tcg/tcg-be-ldst.h
@@ -56,7 +56,7 @@ static inline void tcg_out_tb_init(TCGContext *s)
 static void tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *l);
 static void tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *l);
 
-static void tcg_out_tb_finalize(TCGContext *s)
+static bool tcg_out_tb_finalize(TCGContext *s)
 {
     TCGLabelQemuLdst *lb;
 
@@ -67,7 +67,16 @@ static void tcg_out_tb_finalize(TCGContext *s)
         } else {
             tcg_out_qemu_st_slow_path(s, lb);
         }
+
+        /* Test for (pending) buffer overflow.  The assumption is that any
+           one operation beginning below the high water mark cannot overrun
+           the buffer completely.  Thus we can test for overflow after
+           generating code without having to check during generation.  */
+        if (unlikely((void *)s->code_ptr > s->code_gen_highwater)) {
+            return false;
+        }
     }
+    return true;
 }
 
 /*