target-cris/translate.c: fix out of bounds read
In function t_gen_mov_TN_preg and t_gen_mov_preg_TN, The begin check about the
validity of in-parameter 'r' is useless. We still access cpu_PR[r] in the
follow code if it is invalid. Which will be an out-of-bounds read error.
Fix it by using assert() to ensure it is valid before using it.
Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/target-cris/translate.c b/target-cris/translate.c
index e37b04e..76406af 100644
--- a/target-cris/translate.c
+++ b/target-cris/translate.c
@@ -169,9 +169,7 @@
static inline void t_gen_mov_TN_preg(TCGv tn, int r)
{
- if (r < 0 || r > 15) {
- fprintf(stderr, "wrong register read $p%d\n", r);
- }
+ assert(r >= 0 && r <= 15);
if (r == PR_BZ || r == PR_WZ || r == PR_DZ) {
tcg_gen_mov_tl(tn, tcg_const_tl(0));
} else if (r == PR_VR) {
@@ -182,9 +180,7 @@
}
static inline void t_gen_mov_preg_TN(DisasContext *dc, int r, TCGv tn)
{
- if (r < 0 || r > 15) {
- fprintf(stderr, "wrong register write $p%d\n", r);
- }
+ assert(r >= 0 && r <= 15);
if (r == PR_BZ || r == PR_WZ || r == PR_DZ) {
return;
} else if (r == PR_SRS) {
