[Minios-devel] [UNIKRAFT/MUSL PATCH 14/19] Add stubs for functions related to dlerror.c

[Gaulthier Gain <gaulthier.gain@xxxxxxxxx>]

wip: This commit adds the following stubs: __dl_invalid_handle,
__dl_seterr, __dl_thread_cleanup and dlerror. These functions need
stubs since they use the __pthread_self primitive from musl. It is
necessary to re-write these functions by considering
pthread-embedded declarations.

Signed-off-by: Gaulthier Gain <gaulthier.gain@xxxxxxxxx>
---
 Makefile.uk |  3 ++-
 ldso.c      | 70 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 72 insertions(+), 1 deletion(-)
 create mode 100644 ldso.c

diff --git a/Makefile.uk b/Makefile.uk
index d0d1eef..c9daa9e 100644
--- a/Makefile.uk
+++ b/Makefile.uk
@@ -134,8 +134,9 @@ LIBMUSLGLUE_CXXFLAGS-y += $(LIBMUSLGLUE_SUPPRESS_FLAGS-y)
 # OS dependencies code - Glue between Unicore and musl
 
################################################################################
 LIBMUSLGLUE_SRCS-y += $(LIBMUSL_BASE)/mem.c
+LIBMUSLGLUE_SRCS-y += $(LIBMUSL_BASE)/ldso.c
 
-################################################################################
+#################################################################################
 # musl code -- one external Makefile per sub-lib
 
################################################################################
 include $(LIBMUSL_BASE)/Makefile.uk.musl.mq
diff --git a/ldso.c b/ldso.c
new file mode 100644
index 0000000..afe5fac
--- /dev/null
+++ b/ldso.c
@@ -0,0 +1,70 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
+/*
+ * libmusl glue code
+ *
+ * Authors: Gain Gaulthier <gaulthier.gain@xxxxxxxxx>
+ *
+ * Copyright (c) 2017, University of Liege., Uliege. 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 the copyright holder 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 HOLDER 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.
+ *
+ * THIS HEADER MAY NOT BE EXTRACTED OR MODIFIED IN ANY WAY.
+ */
+#include <errno.h>
+#include <stdlib.h>
+#include <uk/assert.h>
+
+char *dlerror()
+{
+        errno = ENOSYS;
+        return NULL;
+}
+
+void __dl_thread_cleanup(void)
+{
+        UK_CRASH("%s is not implemented", __func__);
+}
+
+__attribute__((__visibility__("hidden")))
+void __dl_vseterr(const char *fmt, va_list ap)
+{
+        UK_CRASH("%s is not implemented", __func__);
+}
+
+__attribute__((__visibility__("hidden")))
+void __dl_seterr(const char *fmt, ...)
+{
+        va_list ap;
+        va_start(ap, fmt);
+        __dl_vseterr(fmt, ap);
+        va_end(ap);
+}
+
+int __dl_invalid_handle(void *h)
+{
+        __dl_seterr("Invalid library handle %p", (void *)h);
+        return -1;
+}
-- 
2.11.0


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