kernel: syscall: Add SYS_mmap and SYS_munmap

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

3 files changed, 52 insertions, 0 deletions

diff --git a/lib/libc/src/hyra/mmap.c b/lib/libc/src/hyra/mmap.c
new file mode 100644
index 0000000..6870c75
--- /dev/null
+++ b/lib/libc/src/hyra/mmap.c
@@ -0,0 +1,47 @@
+/*
+ * 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.
+ */
+
+#include <sys/syscall.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+
+void *
+mmap(void *addr, size_t len, int prot, int flags,
+     int fildes, off_t off)
+
+{
+    return (void *)syscall(SYS_mmap, (uintptr_t)addr, len,
+        prot, flags, fildes, off);
+}
+
+int
+munmap(void *addr, size_t len)
+{
+    return syscall(SYS_munmap, (uintptr_t)addr, len);
+}
diff --git a/sys/include/sys/syscall.h b/sys/include/sys/syscall.h
index 2223a96..dad2e00 100644
--- a/sys/include/sys/syscall.h
+++ b/sys/include/sys/syscall.h
@@ -48,6 +48,8 @@
 #define SYS_write   7
 #define SYS_spawn   8
 #define SYS_reboot  9
+#define SYS_mmap    10
+#define SYS_munmap  11
 
 #if defined(_KERNEL)
 /* Syscall return value and arg type */
diff --git a/sys/kern/kern_syscall.c b/sys/kern/kern_syscall.c
index 249a04a..8a66f0e 100644
--- a/sys/kern/kern_syscall.c
+++ b/sys/kern/kern_syscall.c
@@ -31,6 +31,7 @@
 #include <sys/sysctl.h>
 #include <sys/reboot.h>
 #include <sys/types.h>
+#include <sys/mman.h>
 #include <sys/proc.h>
 #include <sys/vfs.h>
 
@@ -45,6 +46,8 @@ scret_t(*g_sctab[])(struct syscall_args *) = {
     sys_write,  /* SYS_write */
     sys_spawn,  /* SYS_spawn */
     sys_reboot, /* SYS_reboot */
+    sys_mmap,   /* SYS_mmap */
+    sys_munmap, /* SYS_munap */
 };
 
 const size_t MAX_SYSCALLS = NELEM(g_sctab);