Import of the watch repository from Pebble

src/fw/system/syscalls.c

@@ -0,0 +1,46 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stddef.h>
+#include <string.h>
+
+#include "util/attributes.h"
+
+// Newer than 4.7
+#if (__GNUC__ == 4 && __GNUC_MINOR__ > 7) || (__GNUC__ >= 5) || __clang__
+void __aeabi_memcpy(void *dest, const void *src, size_t n) {
+  memcpy(dest, src, n);
+}
+
+void __aeabi_memmove(void * restrict s1, const void * restrict s2, size_t n) {
+  memmove(s1, s2, n);
+}
+
+ALIAS("__aeabi_memcpy") void __aeabi_memcpy4(void *dest, const void *src, size_t n);
+ALIAS("__aeabi_memcpy") void __aeabi_memcpy8(void *dest, const void *src, size_t n);
+
+void __aeabi_memset(void *s, size_t n, int c) {
+  memset(s, c, n);
+}
+
+void __aeabi_memclr(void *addr, size_t n) {
+  memset(addr, 0, n);
+}
+
+ALIAS("__aeabi_memclr") void __aeabi_memclr4(void *s, size_t n);
+ALIAS("__aeabi_memclr") void __aeabi_memclr8(void *s, size_t n);
+
+#endif