[Qemu-devel] [PATCH] add cacheflush in tcg_gen_code_search_pc.

[qiaochong]

 Without cacheflush,qemu sometimes fail with segment fault on loongson
 cpu,which often happens when linux begin to run init.Because user
 porgram tlb refill,tlbl,tlbs,tlbm exception will often happen,
 cpu_restore_state,tcg_gen_code-pc will be called frequently.

Signed-off-by: qiaochong <address@hidden>
---
 tcg/tcg.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/tcg/tcg.c b/tcg/tcg.c
index e0a9030..b5e274c 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -2120,7 +2120,12 @@ int tcg_gen_code(TCGContext *s, uint8_t *gen_code_buf)
    Return -1 if not found. */
 int tcg_gen_code_search_pc(TCGContext *s, uint8_t *gen_code_buf, long offset)
 {
-    return tcg_gen_code_common(s, gen_code_buf, offset);
+    int ret;
+    ret = tcg_gen_code_common(s, gen_code_buf, offset);
+    /* flush instruction cache */
+    flush_icache_range((unsigned long)gen_code_buf, 
+                       (unsigned long)s->code_ptr);
+    return ret;
 }
 
 #ifdef CONFIG_PROFILER
-- 
1.7.0.3.dirty