fix bionic problem

Makefile

@@ -1,8 +1,8 @@
-CFLAGS := -Os -Wall
-LDFLAGS := -pthread -static -s -Wall
-CC := gcc
-AS := as
-OC := objcopy
+CFLAGS := -Os -fPIE -Wall
+LDFLAGS := -pthread -s -pie -Wall
+CC := aarch64-linux-android-gcc
+AS := aarch64-linux-android-as
+OC := aarch64-linux-android-objcopy
 
 debug: CFLAGS += -DDBG
 debug: all

README.md

@@ -21,7 +21,7 @@ By "SELinux bypass" I mean the payload will run in init domian even if SELinux i
 
 ## Building
 
-Pre-built binaries are available on the release page. Otherwise, just run `make` in a native aarch64 debian. Currently it won't work if built with NDK.
+Pre-built binaries are available on the release page. Otherwise, just add NDK standalone toolchain into PATH and run `make`.
 
 ## Usage
 
@@ -38,9 +38,9 @@ You may run it through an adb shell (place it under /data/local/tmp) and get a r
 
 - scumjr for the vDSO patching method.
 - Tzul for helping me debug the sepolicy problem.
+- RenaKunisaki for making it work with bionic.
 
 ## TODO
 
-- Turn it into a SuperSU installer.
 - Enrich the kernel database for x86 support and so on.
 - Test it on Android 7 Nougat (help wanted!).

exploit.c

@@ -39,6 +39,7 @@
 #include <arpa/inet.h>
 #include <sys/ptrace.h>
 #include <sys/socket.h>
+#include <sys/syscall.h>
 
 #include "payload.h"
 
@@ -135,7 +136,7 @@ debuggee(void *arg_)
 
     CHECKSYSCALL(ptrace(PTRACE_TRACEME, 0, NULL, NULL), "ptrace");
 
-    kill(getpid(), SIGSTOP);
+    kill(syscall(SYS_getpid), SIGSTOP);
 
     return 0;
 }