Initial commit

3 files changed, 33 insertions, 0 deletions

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..8590ef7
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,9 @@
+CFLAGS = -O0 -g3
+
+mach_print: main.o mach_print.o
+	gcc -o mach_print main.o mach_print.o
+
+clean:
+	rm -f mach_print *.o
+
+.PHONY: clean
diff --git a/mach_print.S b/mach_print.S
new file mode 100644
index 0000000..606a66e
--- /dev/null
+++ b/mach_print.S
@@ -0,0 +1,3 @@
+#include <mach/machine/syscall_sw.h>
+
+kernel_trap(mach_print,-30,1)
diff --git a/main.c b/main.c
new file mode 100644
index 0000000..23b9fc8
--- /dev/null
+++ b/main.c
@@ -0,0 +1,21 @@
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+void mach_print(char *);
+
+int
+main(int argc, char *argv[])
+{
+    int size;
+    char *s;
+
+    size = snprintf(NULL, 0, "%s\n", argv[1]);
+    assert(size > 0);
+    s = malloc(size);
+    assert(s != NULL);
+    sprintf(s, "%s\n", argv[1]);
+    mach_print(s);
+    free(s);
+    return EXIT_SUCCESS;
+}