add linux driver example

6 files changed, 153 insertions, 0 deletions

diff --git a/tests/projects/linux/bpf/minimal/src/minimal.bpf.c b/tests/projects/linux/bpf/minimal/src/minimal.bpf.c
new file mode 100644
index 000000000..ea1eeefbb
--- /dev/null
+++ b/tests/projects/linux/bpf/minimal/src/minimal.bpf.c
@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+/* Copyright (c) 2020 Facebook */
+#include <linux/bpf.h>
+#include <bpf/bpf_helpers.h>
+
+char LICENSE[] SEC("license") = "Dual BSD/GPL";
+
+int my_pid = 0;
+
+SEC("tp/syscalls/sys_enter_write")
+int handle_tp(void *ctx)
+{
+	int pid = bpf_get_current_pid_tgid() >> 32;
+
+	if (pid != my_pid)
+		return 0;
+
+	bpf_printk("BPF triggered from PID %d.\n", pid);
+
+	return 0;
+}
diff --git a/tests/projects/linux/bpf/minimal/src/minimal.c b/tests/projects/linux/bpf/minimal/src/minimal.c
new file mode 100644
index 000000000..4b6ec3181
--- /dev/null
+++ b/tests/projects/linux/bpf/minimal/src/minimal.c
@@ -0,0 +1,73 @@
+// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
+/* Copyright (c) 2020 Facebook */
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/resource.h>
+#include <bpf/libbpf.h>
+#include "minimal.skel.h"
+
+static int libbpf_print_fn(enum libbpf_print_level level, const char *format, va_list args)
+{
+	return vfprintf(stderr, format, args);
+}
+
+static void bump_memlock_rlimit(void)
+{
+	struct rlimit rlim_new = {
+		.rlim_cur	= RLIM_INFINITY,
+		.rlim_max	= RLIM_INFINITY,
+	};
+
+	if (setrlimit(RLIMIT_MEMLOCK, &rlim_new)) {
+		fprintf(stderr, "Failed to increase RLIMIT_MEMLOCK limit!\n");
+		exit(1);
+	}
+}
+
+int main(int argc, char **argv)
+{
+	struct minimal_bpf *skel;
+	int err;
+
+	/* Set up libbpf errors and debug info callback */
+	libbpf_set_print(libbpf_print_fn);
+
+	/* Bump RLIMIT_MEMLOCK to allow BPF sub-system to do anything */
+	bump_memlock_rlimit();
+
+	/* Open BPF application */
+	skel = minimal_bpf__open();
+	if (!skel) {
+		fprintf(stderr, "Failed to open BPF skeleton\n");
+		return 1;
+	}
+
+	/* ensure BPF program only handles write() syscalls from our process */
+	skel->bss->my_pid = getpid();
+
+	/* Load & verify BPF programs */
+	err = minimal_bpf__load(skel);
+	if (err) {
+		fprintf(stderr, "Failed to load and verify BPF skeleton\n");
+		goto cleanup;
+	}
+
+	/* Attach tracepoint handler */
+	err = minimal_bpf__attach(skel);
+	if (err) {
+		fprintf(stderr, "Failed to attach BPF skeleton\n");
+		goto cleanup;
+	}
+
+	printf("Successfully started!\n");
+
+	for (;;) {
+		/* trigger our BPF program */
+		fprintf(stderr, ".");
+		sleep(1);
+	}
+
+cleanup:
+	minimal_bpf__destroy(skel);
+	return -err;
+}
diff --git a/tests/projects/linux/bpf/minimal/test.lua b/tests/projects/linux/bpf/minimal/test.lua
new file mode 100644
index 000000000..2856a3831
--- /dev/null
+++ b/tests/projects/linux/bpf/minimal/test.lua
@@ -0,0 +1,6 @@
+function main(t)
+    if is_host("linux") and os.arch() == "x86_64" then
+        os.vrun("xmake f -y -p android -vD")
+        os.vrun("xmake -y -vD")
+    end
+end
diff --git a/tests/projects/linux/bpf/minimal/xmake.lua b/tests/projects/linux/bpf/minimal/xmake.lua
new file mode 100644
index 000000000..8507b8aa1
--- /dev/null
+++ b/tests/projects/linux/bpf/minimal/xmake.lua
@@ -0,0 +1,19 @@
+add_rules("mode.release", "mode.debug")
+add_rules("platform.linux.bpf")
+
+add_requires("linux-tools", {configs = {bpftool = true}})
+add_requires("libbpf")
+if is_plat("android") then
+    add_requires("ndk >=22.x")
+    set_toolchains("@ndk", {sdkver = "23"})
+else
+    add_requires("llvm >=10.x")
+    set_toolchains("@llvm")
+    add_requires("linux-headers")
+end
+
+target("minimal")
+    set_kind("binary")
+    add_files("src/*.c")
+    add_packages("linux-tools", "linux-headers", "libbpf")
+    set_license("GPL-2.0")
diff --git a/tests/projects/linux/driver/hello/Makefile b/tests/projects/linux/driver/hello/Makefile
new file mode 100644
index 000000000..d69924339
--- /dev/null
+++ b/tests/projects/linux/driver/hello/Makefile
@@ -0,0 +1,13 @@
+ifneq ($(KERNELRELEASE),)
+    obj-m := hello.o
+else
+    KERN_DIR ?= /usr/src/linux-headers-5.11.0-41-generic/
+    PWD := $(shell pwd)
+
+default:
+	$(MAKE) -C $(KERN_DIR) V=1 M=$(PWD) modules
+endif
+
+clean:
+	rm -rf *.o *~ core .depend .*.cmd *.ko *.mod.c .tmp_versions
+
diff --git a/tests/projects/linux/driver/hello/hello.c b/tests/projects/linux/driver/hello/hello.c
new file mode 100644
index 000000000..2614fb2cc
--- /dev/null
+++ b/tests/projects/linux/driver/hello/hello.c
@@ -0,0 +1,21 @@
+#include <linux/init.h>
+#include <linux/module.h>
+
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_AUTHOR("Ruki");
+MODULE_DESCRIPTION("A simple Hello World Module");
+MODULE_ALIAS("a simplest module");
+
+int hello_init(void)
+{
+    printk(KERN_INFO "Hello World\n");
+    return 0;
+}
+
+void hello_exit(void)
+{
+    printk(KERN_INFO "Goodbye World\n");
+}
+
+module_init(hello_init);
+module_exit(hello_exit);