From f679aaa4c8fd6f72a8e2d60aba2c88127133101a Mon Sep 17 00:00:00 2001
From: Alan Modra <amodra@gmail.com>
Date: Fri, 31 Mar 2023 15:19:10 +1030
Subject: [PATCH] ubsan: aarch64 parse_vector_reg_list
tc-aarch64.c:1473:27: runtime error: left shift of 7 by 30 places
cannot be represented in type 'int'.
* config/tc-aarch64.c (parse_vector_reg_list): Avoid UB left
shift.
---
gas/config/tc-aarch64.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/gas/config/tc-aarch64.c b/gas/config/tc-aarch64.c
index 747cf37d4b8..99fb5de2679 100644
--- a/gas/config/tc-aarch64.c
+++ b/gas/config/tc-aarch64.c
@@ -1393,7 +1393,7 @@ parse_vector_reg_list (char **ccp, aarch64_reg_type type,
char *str = *ccp;
int nb_regs;
struct vector_type_el typeinfo, typeinfo_first;
- int val, val_range, mask;
+ uint32_t val, val_range, mask;
int in_range;
int ret_val;
bool error = false;
@@ -1414,8 +1414,8 @@ parse_vector_reg_list (char **ccp, aarch64_reg_type type,
typeinfo_first.element_size = 0;
typeinfo_first.index = 0;
ret_val = 0;
- val = -1;
- val_range = -1;
+ val = -1u;
+ val_range = -1u;
in_range = 0;
mask = reg_type_mask (type);
do
@@ -1470,7 +1470,7 @@ parse_vector_reg_list (char **ccp, aarch64_reg_type type,
if (! error)
for (;;)
{
- ret_val |= val_range << (5 * nb_regs);
+ ret_val |= val_range << ((5 * nb_regs) & 31);
nb_regs++;
if (val_range == val)
break;