Add dynamic linking support

JIRA: RTOS-664

_projects/armv7a7-imx6ull-evk/rootfs-overlay/etc/rc.psh

@@ -7,4 +7,5 @@ W /sbin/dummyfs -m /var -D
 W /sbin/dummyfs -m /tmp -D
 X /sbin/lwip enet:0x02188000:150:PHY:0.2:irq:-5:/dev/gpio5 enet:0x020b4000:152:no-mdio:PHY:0.1:irq:-6:/dev/gpio5
 X /bin/posixsrv
+W /bin/ldconfig
 X /bin/psh

_projects/armv7a9-zynq7000-qemu/rootfs-overlay/etc/rc.psh

@@ -5,4 +5,5 @@ W /bin/bind devfs /dev
 W /sbin/dummyfs -m /tmp -D
 X /bin/posixsrv
 T /dev/console
+W /bin/ldconfig
 X /linuxrc

_projects/armv7a9-zynq7000-zedboard/rootfs-overlay/etc/rc.psh

@@ -4,4 +4,5 @@ export HOME=/root
 W /bin/bind devfs /dev
 W /sbin/dummyfs -m /tmp -D
 X /bin/posixsrv
+W /bin/ldconfig
 X /bin/psh

_projects/ia32-generic-qemu/rootfs-overlay/etc/rc.psh

@@ -6,4 +6,5 @@ W /sbin/dummyfs -m /tmp -D
 X /bin/posixsrv
 X /sbin/lwip rtl:0x18:11
 T /dev/console
+W /bin/ldconfig
 X /bin/psh

_projects/riscv64-generic-qemu/rootfs-overlay/etc/rc.psh

@@ -4,4 +4,5 @@ export HOME=/root
 W /bin/bind devfs /dev
 W /sbin/dummyfs -m /tmp -D
 X /bin/posixsrv
+W /bin/ldconfig
 X /bin/psh

_projects/sparcv8leon3-generic-qemu/rootfs-overlay/etc/rc.psh

@@ -0,0 +1,6 @@
+:{}:
+export PATH=/bin:/sbin:/usr/bin:/usr/sbin
+export HOME=/root
+W /bin/bind devfs /dev
+X /bin/posixsrv
+X /bin/psh

_user/dlopen/Makefile

@@ -0,0 +1,20 @@
+#
+# Makefile for user application
+#
+# Copyright 2024 Phoenix Systems
+#
+ifeq ($(HAVE_SHLIB), y)
+
+NAME := libhello
+LOCAL_HEADERS := hello.h
+LOCAL_SRCS := hello.c
+
+include $(shared-lib.mk)
+
+
+NAME := dlopen
+LOCAL_SRCS := main.c
+
+include $(binary-dyn.mk)
+
+endif

_user/dlopen/hello.c

@@ -0,0 +1,24 @@
+/*
+ * Phoenix-RTOS
+ *
+ * dlopen
+ *
+ * Example of user application using dlopen.
+ *
+ * Copyright 2024 Phoenix Systems
+ * Author: Hubert Badocha
+ *
+ * This file is part of Phoenix-RTOS.
+ *
+ * %LICENSE%
+ */
+
+#include "hello.h"
+
+#include <stdio.h>
+
+
+int hello(void)
+{
+	return printf("Hello shared world!\n");
+}

_user/dlopen/hello.h

@@ -0,0 +1,21 @@
+/*
+ * Phoenix-RTOS
+ *
+ * dlopen
+ *
+ * Example of user application using dlopen.
+ *
+ * Copyright 2024 Phoenix Systems
+ * Author: Hubert Badocha
+ *
+ * This file is part of Phoenix-RTOS.
+ *
+ * %LICENSE%
+ */
+
+#ifndef _USER_DLOPEN_DYN_H_
+#define _USER_DLOPEN_DYN_H_
+
+int hello(void);
+
+#endif

_user/dlopen/main.c

@@ -0,0 +1,40 @@
+/*
+ * Phoenix-RTOS
+ *
+ * dlopen
+ *
+ * Example of user application using dlopen.
+ *
+ * Copyright 2024 Phoenix Systems
+ * Author: Hubert Badocha
+ *
+ * This file is part of Phoenix-RTOS.
+ *
+ * %LICENSE%
+ */
+
+#include <stddef.h>
+#include <stdio.h>
+#include <dlfcn.h>
+#include <sys/debug.h>
+
+int main(void)
+{
+	void *handle = dlopen("/usr/lib/libhello.so", RTLD_LAZY);
+	if (handle == NULL) {
+		printf("%s\n", dlerror());
+		return 1;
+	}
+	int (*hello)(void) = (int (*)(void))dlsym(handle, "hello");
+	if (hello == NULL) {
+		printf("%s\n", dlerror());
+		(void)dlclose(handle);
+		return 1;
+	}
+
+	hello();
+
+	(void)dlclose(handle);
+
+	return 0;
+}

_user/sharedlib/Makefile

@@ -0,0 +1,21 @@
+#
+# Makefile for user application
+#
+# Copyright 2024 Phoenix Systems
+#
+ifeq ($(HAVE_SHLIB), y)
+
+NAME := libdyn
+LOCAL_HEADERS := dyn.h
+LOCAL_SRCS := dyn.c
+
+include $(shared-lib.mk)
+
+
+NAME := sharedlib
+LOCAL_SRCS := main.c
+DEP_LIBS_SHARED := libdyn
+
+include $(binary-dyn.mk)
+
+endif

_user/sharedlib/dyn.c

@@ -0,0 +1,25 @@
+/*
+ * Phoenix-RTOS
+ *
+ * sharedlib
+ *
+ * Example of user application using shared libraries.
+ *
+ * Copyright 2024 Phoenix Systems
+ * Author: Hubert Badocha
+ *
+ * This file is part of Phoenix-RTOS.
+ *
+ * %LICENSE%
+ */
+
+#include "dyn.h"
+
+
+extern void *_DYNAMIC;
+
+
+void *dyn(void)
+{
+	return &_DYNAMIC;
+}

_user/sharedlib/dyn.h

@@ -0,0 +1,22 @@
+/*
+ * Phoenix-RTOS
+ *
+ * sharedlib
+ *
+ * Example of user application using shared libraries.
+ *
+ * Copyright 2024 Phoenix Systems
+ * Author: Hubert Badocha
+ *
+ * This file is part of Phoenix-RTOS.
+ *
+ * %LICENSE%
+ */
+
+
+#ifndef _USER_SHAREDLIB_DYN_H_
+#define _USER_SHAREDLIB_DYN_H_
+
+void *dyn(void);
+
+#endif

_user/sharedlib/main.c

@@ -0,0 +1,25 @@
+/*
+ * Phoenix-RTOS
+ *
+ * sharedlib
+ *
+ * Example of user application using shared libraries.
+ *
+ * Copyright 2024 Phoenix Systems
+ * Author: Hubert Badocha
+ *
+ * This file is part of Phoenix-RTOS.
+ *
+ * %LICENSE%
+ */
+
+#include <stdio.h>
+
+#include "dyn.h"
+
+int main(void)
+{
+	printf("Dynamic section pointer %p\n", dyn());
+
+	return 0;
+}