Add a virtio block test.

With virtio we must use dynamic allocation for the correctness of
virt_to_phys

bootfs.manifest

@@ -18,6 +18,7 @@
 /tests/tst-getcwd.so: ../../external/glibc-testsuite/build/debug/io/tst-getcwd.so
 /tests/tst-clock.so: ../../external/glibc-testsuite/build/debug/rt/tst-clock.so
 /tests/tst-ramdisk.so: ./tests/tst-ramdisk.so
+/tests/tst-ramdisk.so: ./tests/tst-vblk.so
 /java/Hello.class: ./tests/hello/Hello.class
 /java.so: java/java.so
 /java/RunJar.class: java/RunJar.class

build.mak

@@ -65,7 +65,7 @@ autodepend = -MD -MT $@ -MP
 do-sys-includes = $(foreach inc, $(sys-includes), -isystem $(inc))
 
 tests := tests/tst-pthread.so tests/tst-ramdisk.so tests/hello/Hello.class
-tests += tests/bench/bench.jar
+tests += tests/tst-vblk.so tests/bench/bench.jar
 
 tests/hello/Hello.class: javabase=tests/hello
 
@@ -73,6 +73,7 @@ java/RunJar.class: javabase=java
 
 tests/tst-pthread.so: tests/tst-pthread.o
 tests/tst-ramdisk.so: tests/tst-ramdisk.o
+tests/tst-vblk.so: tests/tst-vblk.o
 
 all: loader.img loader.bin
 

tests/tst-vblk.c

+
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#define BUF_SIZE	4096
+
+int main(int argc, char **argv)
+{
+	int fd;
+        char *wbuf,*rbuf;
+
+        // malloc is used since virt_to_phys doesn't work
+        // on stack addresses and virtio needs that
+        wbuf = malloc(BUF_SIZE);
+        rbuf = malloc(BUF_SIZE);
+	
+        fd = open("/dev/vblk0", O_RDWR);
+	if (fd < 0) {
+		perror("open");
+		return 1;
+	}
+
+	memset(wbuf, 0xab, BUF_SIZE);
+	if (pwrite(fd, wbuf, BUF_SIZE, 0) != BUF_SIZE) {
+		perror("pwrite");
+		return 1;
+	}
+
+	memset(rbuf, 0, BUF_SIZE);
+	if (pread(fd, rbuf, BUF_SIZE, 0) != BUF_SIZE) {
+		perror("pwrite");
+		return 1;
+	}
+	if (memcmp(wbuf, wbuf, BUF_SIZE) != 0) {
+		fprintf(stderr, "read error\n");
+		return 1;
+	}
+
+	close(fd);
+	return 0;
+}