src/atomics/OSAtomicFifo.h

   1 //
   2 //  OSAtomicFifo.h
   3 //  libatomics
   4 //
   5 //  Created by Rokhini Prabhu on 4/7/20.
   6 //
   7
   8 #ifndef _OS_ATOMIC_FIFO_QUEUE_
   9 #define _OS_ATOMIC_FIFO_QUEUE_
  10
  11 #if defined(__arm64e__) && __has_feature(ptrauth_calls)
  12 #include <ptrauth.h>
  13
  14 #define COMMPAGE_PFZ_BASE_AUTH_KEY ptrauth_key_process_independent_code
  15 #define COMMPAGE_PFZ_FN_AUTH_KEY ptrauth_key_function_pointer
  16 #define COMMPAGE_PFZ_BASE_DISCRIMINATOR ptrauth_string_discriminator("pfz")
  17
  18 #define COMMPAGE_PFZ_BASE_PTR __ptrauth(COMMPAGE_PFZ_BASE_AUTH_KEY, 1, COMMPAGE_PFZ_BASE_DISCRIMINATOR)
  19
  20 #define SIGN_PFZ_FUNCTION_PTR(ptr) ptrauth_sign_unauthenticated(ptr, COMMPAGE_PFZ_FN_AUTH_KEY, 0)
  21
  22 #else /* defined(__arm64e__) && __has_feature(ptrauth_calls) */
  23
  24 #define COMMPAGE_PFZ_BASE_AUTH_KEY 0
  25 #define COMMPAGE_PFZ_FN_AUTH_KEY 0
  26 #define COMMPAGE_PFZ_BASE_DISCRIMINATOR 0
  27
  28 #define COMMPAGE_PFZ_BASE_PTR
  29
  30 #define SIGN_PFZ_FUNCTION_PTR(ptr) ptr
  31 #endif /* defined(__arm64e__) && __has_feature(ptrauth_calls) */
  32
  33 extern void *COMMPAGE_PFZ_BASE_PTR commpage_pfz_base;
  34
  35 #endif /* _OS_ATOMIC_FIFO_QUEUE_ */