tcg: Allow goto_tb to any target PC in user mode

In user mode, there's only a static address translation, TBs are always
invalidated properly and direct jumps are reset when mapping change.
Thus the destination address is always valid for direct jumps and
there's no need to restrict it to the pages the TB resides in.

Signed-off-by: Sergey Fedorov <serge.fdrv@gmail.com>
Signed-off-by: Sergey Fedorov <sergey.fedorov@linaro.org>
Cc: Riku Voipio <riku.voipio@iki.fi>
Cc: Blue Swirl <blauwirbel@gmail.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>

1 files changed, 15 insertions, 5 deletions

diff --git a/target-mips/translate.c b/target-mips/translate.c
index a3a05ec..ddfb924 100644
--- a/target-mips/translate.c
+++ b/target-mips/translate.c
@@ -4191,15 +4191,25 @@ static void gen_trap (DisasContext *ctx, uint32_t opc,
     tcg_temp_free(t1);
 }
 
+static inline bool use_goto_tb(DisasContext *ctx, target_ulong dest)
+{
+    if (unlikely(ctx->singlestep_enabled)) {
+        return false;
+    }
+
+#ifndef CONFIG_USER_ONLY
+    return (ctx->tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK);
+#else
+    return true;
+#endif
+}
+
 static inline void gen_goto_tb(DisasContext *ctx, int n, target_ulong dest)
 {
-    TranslationBlock *tb;
-    tb = ctx->tb;
-    if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK) &&
-        likely(!ctx->singlestep_enabled)) {
+    if (use_goto_tb(ctx, dest)) {
         tcg_gen_goto_tb(n);
         gen_save_pc(dest);
-        tcg_gen_exit_tb((uintptr_t)tb + n);
+        tcg_gen_exit_tb((uintptr_t)ctx->tb + n);
     } else {
         gen_save_pc(dest);
         if (ctx->singlestep_enabled) {