Import hyra expt

1 files changed, 105 insertions, 0 deletions

diff --git a/sys/kern/kern_syslog.c b/sys/kern/kern_syslog.c
new file mode 100644
index 0000000..6962a69
--- /dev/null
+++ b/sys/kern/kern_syslog.c
@@ -0,0 +1,105 @@
+/*
+ * Copyright (c) 2023-2024 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/syslog.h>
+#include <sys/spinlock.h>
+#include <dev/cons/cons.h>
+#include <dev/timer.h>
+#include <stdarg.h>
+#include <string.h>
+
+/* Global logger lock */
+static struct spinlock lock = {0};
+
+static void
+syslog_write(const char *s, size_t len)
+{
+    const char *p = s;
+
+    while (len--) {
+        cons_putch(&g_root_scr, *p);
+        ++p;
+    }
+}
+
+/*
+ * XXX: Not serialized
+ */
+void
+vkprintf(const char *fmt, va_list *ap)
+{
+    char buffer[1024] = {0};
+
+    vsnprintf(buffer, sizeof(buffer), fmt, *ap);
+    syslog_write(buffer, strlen(buffer));
+}
+
+void
+kprintf(const char *fmt, ...)
+{
+    va_list ap;
+    char timestamp[64] = "[  0.000000] ";
+    const char *fmt_p = fmt;
+    bool use_timestamp = true;
+    bool has_counter = true;
+    struct timer tmr;
+
+    /*
+     * If the first char is OMIT_TIMESTAMP, then we won't
+     * print out the timestamp.
+     */
+    if (*fmt == OMIT_TIMESTAMP[0]) {
+        ++fmt_p;
+        use_timestamp = false;
+    }
+
+    /* See if we have a timer */
+    if (req_timer(TIMER_GP, &tmr) != TMRR_SUCCESS) {
+        has_counter = false;
+    }
+
+    /* If we can use the counter, format the timestamp */
+    if (has_counter) {
+        if (tmr.get_time_sec != NULL && tmr.get_time_usec != NULL) {
+            snprintf(timestamp, sizeof(timestamp), "[  %d.%06d] ",
+                tmr.get_time_sec(), tmr.get_time_usec());
+        }
+    }
+
+    if (use_timestamp) {
+        syslog_write(timestamp, strlen(timestamp));
+    }
+
+    spinlock_acquire(&lock);
+    va_start(ap, fmt);
+
+    vkprintf(fmt_p, &ap);
+    va_end(ap);
+    spinlock_release(&lock);
+}