Merge branch 'PHP-8.3' into PHP-8.4

Author: devnexen

NEWS

@@ -26,6 +26,10 @@ PHP                                                                        NEWS
   . Fixed bug GH-16334 (imageaffine overflow on matrix elements).
     (David Carlier)
 
+- GMP:
+  . Fixed floating point exception bug with gmp_pow when using
+    large exposant values. (David Carlier).
+
 - MBstring:
   . Fixed bug GH-16361 (mb_substr overflow on start/length arguments).
     (David Carlier)

ext/gmp/gmp.c

@@ -1288,12 +1288,37 @@ ZEND_FUNCTION(gmp_pow)
 
 	if (Z_TYPE_P(base_arg) == IS_LONG && Z_LVAL_P(base_arg) >= 0) {
 		INIT_GMP_RETVAL(gmpnum_result);
-		mpz_ui_pow_ui(gmpnum_result, Z_LVAL_P(base_arg), exp);
+		if (exp >= INT_MAX) {
+			mpz_t base_num, exp_num, mod;
+			mpz_init(base_num);
+			mpz_init(exp_num);
+			mpz_init(mod);
+			mpz_set_si(base_num, Z_LVAL_P(base_arg));
+			mpz_set_si(exp_num, exp);
+			mpz_set_ui(mod, UINT_MAX);
+			mpz_powm(gmpnum_result, base_num, exp_num, mod);
+			mpz_clear(mod);
+			mpz_clear(exp_num);
+			mpz_clear(base_num);
+		} else {
+			mpz_ui_pow_ui(gmpnum_result, Z_LVAL_P(base_arg), exp);
+		}
 	} else {
 		mpz_ptr gmpnum_base;
 		FETCH_GMP_ZVAL(gmpnum_base, base_arg, temp_base, 1);
 		INIT_GMP_RETVAL(gmpnum_result);
-		mpz_pow_ui(gmpnum_result, gmpnum_base, exp);
+		if (exp >= INT_MAX) {
+			mpz_t exp_num, mod;
+			mpz_init(exp_num);
+			mpz_init(mod);
+			mpz_set_si(exp_num, exp);
+			mpz_set_ui(mod, UINT_MAX);
+			mpz_powm(gmpnum_result, gmpnum_base, exp_num, mod);
+			mpz_clear(mod);
+			mpz_clear(exp_num);
+		} else {
+			mpz_pow_ui(gmpnum_result, gmpnum_base, exp);
+		}
 		FREE_GMP_TEMP(temp_base);
 	}
 }

ext/gmp/tests/gmp_pow_fpe.phpt

@@ -0,0 +1,20 @@
+--TEST--
+gmp_pow() floating point exception
+--EXTENSIONS--
+gmp
+--FILE--
+<?php
+$g = gmp_init(256);
+
+var_dump(gmp_pow($g, PHP_INT_MAX));
+var_dump(gmp_pow(256, PHP_INT_MAX));
+?>
+--EXPECTF--
+object(GMP)#2 (1) {
+  ["num"]=>
+  string(%d) "%s"
+}
+object(GMP)#2 (1) {
+  ["num"]=>
+  string(%d) "%s"
+}