Userland test programs

host/Makefile

@@ -3,14 +3,10 @@ ccflags-y := -Wno-declaration-after-statement -std=gnu99
 
 .PHONY: all clean
 
-all: hello.ko ins_rm_mod.out
+all: hello.ko
 
 hello.ko: hello.c
 	make -C '/lib/modules/$(shell uname -r)/build' M='$(PWD)' modules
 
 clean:
 	make -C '/lib/modules/$(shell uname -r)/build' M='$(PWD)' clean
-	rm -f ins_rm_mod.out
-
-ins_rm_mod.out: ins_rm_mod.c hello.c
-	gcc -Wall -std=gnu99 -o ins_rm_mod.out ins_rm_mod.c

host/README.md

@@ -3,7 +3,6 @@
 Simple things that can be demonstrated by inserting a module into the currently running host. Tested on Ubuntu 16.04.
 
 1. [hello](hello.c)
-1. [ins_rm_mod.c](ins_rm_mod.c)
 
 ## Rationale
 
@@ -34,7 +33,3 @@ Build, insert and remove a hello world module:
 
     # Last message should be: cleanup_module
     dmest -T
-
-Insert and remove the `hello.ko` module from a C program with system calls:
-
-	sudo ./ins_rm_mod.out

host/ins_rm_mod.c

@@ -1,36 +0,0 @@
-/*
-http://stackoverflow.com/questions/5947286/how-can-linux-kernel-modules-be-loaded-from-c-code/38606527#38606527
-*/
-
-#define _GNU_SOURCE
-#include <assert.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <sys/stat.h>
-#include <sys/syscall.h>
-#include <sys/types.h>
-#include <unistd.h>
-#include <stdlib.h>
-
-#define init_module(mod, len, opts) syscall(__NR_init_module, mod, len, opts)
-#define delete_module(name, flags) syscall(__NR_delete_module, name, flags)
-
-int main(void) {
-    int fd = open("hello.ko", O_RDONLY);
-    struct stat st;
-    fstat(fd, &st);
-    size_t image_size = st.st_size;
-    void *image = malloc(image_size);
-    read(fd, image, image_size);
-    close(fd);
-    if (init_module(image, image_size, "") != 0) {
-        perror("init_module");
-        return EXIT_FAILURE;
-    }
-    free(image);
-    if (delete_module("hello", O_NONBLOCK) != 0) {
-        perror("delete_modul");
-        return EXIT_FAILURE;
-    }
-    return EXIT_SUCCESS;
-}