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diff --git a/loader/syscalls.h b/loader/syscalls.h
index e82e0fa..d5a8048 100644
--- a/loader/syscalls.h
+++ b/loader/syscalls.h
@@ -9,15 +9,25 @@ long g_syscall(long number, ...);
 // arg6 is func ptr, for convenience
 long g_clone(unsigned long flags, void *child_stack, ...);
 
-int  g_syscall_error(long kret);
+long g_syscall_error(long kret);
 
 // raw - no errno handling
 long g_open_raw(const char *pathname, int flags, ...);
 long g_read_raw(int fd, void *buf, size_t count);
 long g_write_raw(int fd, const void *buf, size_t count);
+long g_mmap2_raw(void *addr, size_t length, int prot, int flags,
+                 int fd, off_t offset);
+long g_munmap_raw(void *addr, size_t length);
+long g_ioctl_raw(int fd, unsigned long request, ...);
+long g_close_raw(int fd);
+long g_chdir_raw(const char *path);
 long g_futex_raw(int *uaddr, int op, int val,
                  const struct timespec *timeout);
 long g_nanosleep_raw(const struct timespec *req, struct timespec *rem);
+long g_readlink_raw(const char *pathname, char *buf, size_t bufsiz);
 long g_clock_gettime_raw(int clk_id, const struct timespec *tp);
 long g_rt_sigprocmask_raw(int how, const void *set, void *oldset,
-                         size_t sigsetsize);
+                          size_t sigsetsize);
+long __attribute__((noreturn))
+     g_exit_group_raw(int status);
+