x86: parse_real_register() does not alter the parsed string

Follow the model of strtol() et al - input string is const-qualified to
signal that the string isn't altered, but the returned "end" pointer is
not const-qualified, requiring const to be cast away (which generally is
a bad idea, but the alternative would be more convoluted code).

diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c
index ea5705da4afe5b5c4bc6067e491382857f40d032..063c9705dddc1e5459bb385d3cbcff1707f32164 100644 (file)
--- a/gas/config/tc-i386.c
+++ b/gas/config/tc-i386.c
@@ -13750,9 +13750,9 @@ static bool check_register (const reg_entry *r)
 /* REG_STRING starts *before* REGISTER_PREFIX.  */
 
 static const reg_entry *
-parse_real_register (char *reg_string, char **end_op)
+parse_real_register (const char *reg_string, char **end_op)
 {
-  char *s = reg_string;
+  const char *s = reg_string;
   char *p;
   char reg_name_given[MAX_REG_NAME_SIZE + 1];
   const reg_entry *r;
@@ -13775,7 +13775,7 @@ parse_real_register (char *reg_string, char **end_op)
   if (is_part_of_name (*s))
     return (const reg_entry *) NULL;
 
-  *end_op = s;
+  *end_op = (char *) s;
 
   r = (const reg_entry *) str_hash_find (reg_hash, reg_name_given);
 
@@ -13803,7 +13803,7 @@ parse_real_register (char *reg_string, char **end_op)
                ++s;
              if (*s == ')')
                {
-                 *end_op = s + 1;
+                 *end_op = (char *) s + 1;
                  know (r[fpr].reg_num == fpr);
                  return r + fpr;
                }