kernel: add aarch64 architecture support

Signed-off-by: EnderIce2 <enderice2@protonmail.com>

Userspace/libc/src/softfloat.c

@@ -0,0 +1,21 @@
+/*
+	This file is part of Fennix C Library.
+
+	Fennix C Library is free software: you can redistribute it and/or
+	modify it under the terms of the GNU General Public License as
+	published by the Free Software Foundation, either version 3 of
+	the License, or (at your option) any later version.
+
+	Fennix C Library is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with Fennix C Library. If not, see <https://www.gnu.org/licenses/>.
+*/
+
+double __trunctfdf2(long double a)
+{
+	return (double)a;
+}

Userspace/libc/src/std/pthread.c

@@ -108,8 +108,12 @@ export int pthread_rwlockattr_setpshared(pthread_rwlockattr_t *, int);
 export pthread_t pthread_self(void)
 {
 	pthread_t tid;
+#if defined(__amd64__) || defined(__i386__)
 	__asm__ __volatile__("mov %%fs:0, %0"
 						 : "=r"(tid));
+#elif defined(__aarch64__)
+	tid = 0;
+#endif
 	return tid;
 }
 

Userspace/libc/src/tls.c

@@ -24,7 +24,10 @@
 
 export __attribute__((naked, used, no_stack_protector)) void *__tls_get_addr(void *__data)
 {
+#warning "__tls_get_addr not implemented"
+#if defined(__amd64__) || defined(__i386__)
 	__asm__("ud2");
+#endif
 }
 
 int __init_pthread(void)