1 files changed, 96 insertions, 0 deletions
diff --git a/sys/kern/kern_spawn.c b/sys/kern/kern_spawn.c
new file mode 100644
index 0000000..6adf726
--- /dev/null
+++ b/sys/kern/kern_spawn.c
@@ -0,0 +1,96 @@
+/*
+ * 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/proc.h>
+#include <sys/mman.h>
+#include <sys/errno.h>
+#include <sys/syslog.h>
+#include <sys/atomic.h>
+#include <sys/signal.h>
+#include <sys/sched.h>
+#include <vm/dynalloc.h>
+#include <string.h>
+
+#define pr_trace(fmt, ...) kprintf("spawn: " fmt, ##__VA_ARGS__)
+#define pr_error(...) pr_trace(__VA_ARGS__)
+
+static volatile size_t nthreads = 0;
+
+/*
+ * Spawn a new process
+ *
+ * @cur: Parent (current) process.
+ * @flags: Spawn flags.
+ * @ip: Location for process to start
+ * @newprocp: If not NULL, will contain the new process.
+ */
+int
+spawn(struct proc *cur, int flags, void(*ip)(void), struct proc **newprocp)
+{
+    struct proc *newproc;
+    struct mmap_lgdr *mlgdr;
+    int error;
+
+    newproc = dynalloc(sizeof(*newproc));
+    if (newproc == NULL) {
+        pr_error("could not alloc proc (-ENOMEM)\n");
+        return -ENOMEM;
+    }
+
+    mlgdr = dynalloc(sizeof(*mlgdr));
+    if (mlgdr == NULL) {
+        dynfree(newproc);
+        pr_error("could not alloc proc mlgdr (-ENOMEM)\n");
+        return -ENOMEM;
+    }
+
+    memset(newproc, 0, sizeof(*newproc));
+    error = md_spawn(newproc, cur, (uintptr_t)ip);
+    if (error < 0) {
+        dynfree(newproc);
+        dynfree(mlgdr);
+        pr_error("error initializing proc\n");
+        return error;
+    }
+
+    /* Set proc output if we can */
+    if (newprocp != NULL) {
+        *newprocp = newproc;
+    }
+
+    /* Initialize the mmap ledger */
+    mlgdr->nbytes = 0;
+    RBT_INIT(lgdr_entries, &mlgdr->hd);
+    newproc->mlgdr = mlgdr;
+
+    newproc->pid = ++nthreads;
+    signals_init(newproc);
+    sched_enqueue_td(newproc);
+    return 0;
+}