Starting to test darwin and freebsd support

Author: brimstone

shellcode_linux.go renamed to shellcode_unix.go

@@ -1,3 +1,4 @@
+// +build linux freebsd darwin
 package shellcode
 
 /*
@@ -6,24 +7,26 @@ package shellcode
 #include <string.h>
 #include <unistd.h>
 
-void call(char *shellcode) {
+void call(char *shellcode, size_t length) {
 	if(fork()) {
 		return;
 	}
 	unsigned char *ptr;
-	ptr = (unsigned char *) mmap(0, 0x1000, \
+	ptr = (unsigned char *) mmap(0, length, \
 		PROT_READ|PROT_WRITE|PROT_EXEC, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
 	if(ptr == MAP_FAILED) {
 		perror("mmap");
 		return;
 	}
-	memcpy(ptr, shellcode, strlen(shellcode));
+	memcpy(ptr, shellcode, length);
 	( *(void(*) ()) ptr)();
 }
 */
 import "C"
-import "unsafe"
+import (
+	"unsafe"
+)
 
 func Run(sc []byte) {
-	C.call((*C.char)(unsafe.Pointer(&sc[0])))
+	C.call((*C.char)(unsafe.Pointer(&sc[0])), (C.size_t)(len(sc)))
 }