soc/runtime: resolve compiler_rt symbols in kernel

soc/runtime/symbols.c

@@ -28,7 +28,52 @@ static long long int gcd64(long long int a, long long int b)
     return b;
 }
 
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wimplicit-int"
+extern __divsi3, __modsi3, __ledf2, __gedf2, __unorddf2, __negsf2, __negdf2,
+    __addsf3, __subsf3, __mulsf3, __divsf3, __lshrdi3, __muldi3, __divdi3,
+    __ashldi3, __ashrdi3, __udivmoddi4, __floatsisf, __floatunsisf, __fixsfsi,
+    __fixunssfsi, __adddf3, __subdf3, __muldf3, __divdf3, __floatsidf,
+    __floatunsidf, __floatdidf, __fixdfsi, __fixunsdfsi, __clzsi2, __ctzsi2,
+    __udivdi3, __umoddi3, __moddi3;
+#pragma GCC diagnostic pop
+
 static const struct symbol arithmetic[] = {
+    {"__divsi3", &__divsi3},
+    {"__modsi3", &__modsi3},
+    {"__ledf2", &__ledf2},
+    {"__gedf2", &__gedf2},
+    {"__unorddf2", &__gedf2},
+    {"__negsf2", &__negsf2},
+    {"__negdf2", &__negdf2},
+    {"__addsf3", &__addsf3},
+    {"__subsf3", &__subsf3},
+    {"__mulsf3", &__mulsf3},
+    {"__divsf3", &__divsf3},
+    {"__lshrdi3", &__lshrdi3},
+    {"__muldi3", &__muldi3},
+    {"__divdi3", &__divdi3},
+    {"__ashldi3", &__ashldi3},
+    {"__ashrdi3", &__ashrdi3},
+    {"__udivmoddi4", &__udivmoddi4},
+    {"__floatsisf", &__floatsisf},
+    {"__floatunsisf", &__floatunsisf},
+    {"__fixsfsi", &__fixsfsi},
+    {"__fixunssfsi", &__fixunssfsi},
+    {"__adddf3", &__adddf3},
+    {"__subdf3", &__subdf3},
+    {"__muldf3", &__muldf3},
+    {"__divdf3", &__divdf3},
+    {"__floatsidf", &__floatsidf},
+    {"__floatunsidf", &__floatunsidf},
+    {"__floatdidf", &__floatdidf},
+    {"__fixdfsi", &__fixdfsi},
+    {"__fixunsdfsi", &__fixunsdfsi},
+    {"__clzsi2", &__clzsi2},
+    {"__ctzsi2", &__ctzsi2},
+    {"__udivdi3", &__udivdi3},
+    {"__umoddi3", &__umoddi3},
+    {"__moddi3", &__moddi3},
     {"__gcd64", gcd64},
     {NULL, NULL}
 };