usr: libc: Add AARCH64 stubs

Signed-off-by: Ian Moffett <ian@osmora.org>

2 files changed, 120 insertions, 0 deletions

diff --git a/lib/libc/include/arch/aarch64/syscall.h b/lib/libc/include/arch/aarch64/syscall.h
new file mode 100644
index 0000000..84a51e0
--- /dev/null
+++ b/lib/libc/include/arch/aarch64/syscall.h
@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Hyra nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _MACHINE_SYSCALL_H_
+#define _MACHINE_SYSCALL_H_
+
+#if !defined(__ASSEMBLER__)
+__always_inline static inline long
+syscall0(uint64_t code)
+{
+    return 0;
+}
+
+__always_inline static inline long
+syscall1(uint64_t code, uint64_t arg0)
+{
+    return 0;
+}
+
+__always_inline static long inline
+syscall2(uint64_t code, uint64_t arg0, uint64_t arg1)
+{
+    return 0;
+}
+
+__always_inline static inline long
+syscall3(uint64_t code, uint64_t arg0, uint64_t arg1, uint64_t arg2)
+{
+    return 0;
+}
+
+__always_inline static inline long
+syscall4(uint64_t code, uint64_t arg0, uint64_t arg1, uint64_t arg2, uint64_t arg3)
+{
+    return 0;
+}
+
+__always_inline static inline long
+syscall5(uint64_t code, uint64_t arg0, uint64_t arg1, uint64_t arg2, uint64_t arg3, uint64_t arg4)
+{
+    return 0;
+}
+
+__always_inline static inline long
+syscall6(uint64_t code, uint64_t arg0, uint64_t arg1, uint64_t arg2, uint64_t arg3, uint64_t arg4, uint64_t arg5)
+{
+    return 0;
+}
+
+#define _SYSCALL_N(a0, a1, a2, a3, a4, a5, a6, name, ...) \
+    name
+
+#define syscall(...) \
+_SYSCALL_N(__VA_ARGS__, syscall6, syscall5, \
+            syscall4, syscall3, syscall2, syscall1, \
+            syscall0)(__VA_ARGS__)
+
+#endif  /* !__ASSEMBLER__ */
+#endif  /* !_MACHINE_SYSCALL_H_ */
diff --git a/lib/libc/src/arch/aarch64/crti.S b/lib/libc/src/arch/aarch64/crti.S
new file mode 100644
index 0000000..d95220b
--- /dev/null
+++ b/lib/libc/src/arch/aarch64/crti.S
@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Hyra nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+    .text
+    .globl _start
+_start:
+    mov fp, xzr
+    mov x0, sp
+1:  b 1b