liblog: Add xlog symbols on MTK hardware

Change-Id: I1c4bfb228ee261ae4d15e223b4605e39205b5b54

1 files changed, 39 insertions, 0 deletions

diff --git a/liblog/logd_write.c b/liblog/logd_write.c
index bdee28f..7f772af 100644
--- a/liblog/logd_write.c
+++ b/liblog/logd_write.c
@@ -513,3 +513,42 @@ int __android_log_bswrite(int32_t tag, const char *payload)
 
     return write_to_log(LOG_ID_EVENTS, vec, 4);
 }
+
+#ifdef MTK_HARDWARE
+struct xlog_record {
+    const char *tag_str;
+    const char *fmt_str;
+    int prio;
+};
+
+void __attribute__((weak)) __xlog_buf_printf(__unused int bufid, const struct xlog_record *xlog_record, ...) {
+    va_list args;
+    va_start(args, xlog_record);
+#if    HAVE_LIBC_SYSTEM_PROPERTIES
+    int len = 0;
+    int do_xlog = 0;
+    char results[PROP_VALUE_MAX];
+
+
+    // MobileLog
+    len = __system_property_get ("debug.MB.running", results);
+    if (len && atoi(results))
+        do_xlog = 1;
+
+    // ModemLog
+    len = __system_property_get ("debug.mdlogger.Running", results);
+    if (len && atoi(results))
+        do_xlog = 1;
+
+    // Manual
+    len = __system_property_get ("persist.debug.xlog.enable", results);
+    if (len && atoi(results))
+        do_xlog = 1;
+
+    if (do_xlog > 0)
+#endif
+        __android_log_vprint(xlog_record->prio, xlog_record->tag_str, xlog_record->fmt_str, args);
+
+    return;
+}
+#endif