src/ucontext/arm64/mcontext.c

   1 #include "asm_help.h"
   2
   3 #define _XOPEN_SOURCE 600L
   4 #include <ucontext.h>
   5 #include <stddef.h>
   6
   7 #include <mach/arm/thread_status.h>
   8
   9 _Static_assert(offsetof(struct __darwin_mcontext64, __ss.__x[0]) == MCONTEXT_OFFSET_X0,
  10                 "MCONTEXT_OFFSET_X0");
  11 _Static_assert(offsetof(struct __darwin_mcontext64, __ss.__x[19]) == MCONTEXT_OFFSET_X19_X20,
  12                 "MCONTEXT_OFFSET_X19_X20");
  13 _Static_assert(offsetof(struct __darwin_mcontext64, __ss.__x[21]) == MCONTEXT_OFFSET_X21_X22,
  14                 "MCONTEXT_OFFSET_X21_X22");
  15 _Static_assert(offsetof(struct __darwin_mcontext64, __ss.__x[23]) == MCONTEXT_OFFSET_X23_X24,
  16                 "MCONTEXT_OFFSET_X23_X24");
  17 _Static_assert(offsetof(struct __darwin_mcontext64, __ss.__x[25]) == MCONTEXT_OFFSET_X25_X26,
  18                 "MCONTEXT_OFFSET_X25_X26");
  19 _Static_assert(offsetof(struct __darwin_mcontext64, __ss.__x[27]) == MCONTEXT_OFFSET_X27_X28,
  20                 "MCONTEXT_OFFSET_X27_X28");
  21
  22 #if __has_feature(ptrauth_calls)
  23 _Static_assert(offsetof(struct __darwin_mcontext64, __ss.__opaque_fp) == MCONTEXT_OFFSET_FP_LR,
  24                 "MCONTEXT_OFFSET_FP_LR");
  25 _Static_assert(offsetof(struct __darwin_mcontext64, __ss.__opaque_sp) == MCONTEXT_OFFSET_SP,
  26                 "MCONTEXT_OFFSET_SP");
  27 _Static_assert(offsetof(struct __darwin_mcontext64, __ss.__opaque_flags) == MCONTEXT_OFFSET_FLAGS,
  28                 "MCONTEXT_OFFSET_FLAGS");
  29 #else
  30 _Static_assert(offsetof(struct __darwin_mcontext64, __ss.__fp) == MCONTEXT_OFFSET_FP_LR,
  31                 "MCONTEXT_OFFSET_FP_LR");
  32 _Static_assert(offsetof(struct __darwin_mcontext64, __ss.__sp) == MCONTEXT_OFFSET_SP,
  33                 "MCONTEXT_OFFSET_SP");
  34 #endif
  35
  36
  37 // Neon registers are 128 bits wide. d suffix refers to the last 64 bits of the
  38 // 128 bit register. Hence the -8 offset.
  39 _Static_assert(offsetof(struct __darwin_mcontext64, __ns.__v[8]) == (MCONTEXT_OFFSET_D8 - 8),
  40                 "MCONTEXT_OFFSET_D8");
  41 _Static_assert(offsetof(struct __darwin_mcontext64, __ns.__v[9]) == (MCONTEXT_OFFSET_D9 - 8),
  42                 "MCONTEXT_OFFSET_D9");
  43 _Static_assert(offsetof(struct __darwin_mcontext64, __ns.__v[10]) == (MCONTEXT_OFFSET_D10 - 8),
  44                 "MCONTEXT_OFFSET_D10");
  45 _Static_assert(offsetof(struct __darwin_mcontext64, __ns.__v[11]) == (MCONTEXT_OFFSET_D11 - 8),
  46                 "MCONTEXT_OFFSET_D11");
  47 _Static_assert(offsetof(struct __darwin_mcontext64, __ns.__v[12]) == (MCONTEXT_OFFSET_D12 - 8),
  48                 "MCONTEXT_OFFSET_D12");
  49 _Static_assert(offsetof(struct __darwin_mcontext64, __ns.__v[13]) == (MCONTEXT_OFFSET_D13 - 8),
  50                 "MCONTEXT_OFFSET_D13");
  51 _Static_assert(offsetof(struct __darwin_mcontext64, __ns.__v[14]) == (MCONTEXT_OFFSET_D14 - 8),
  52                 "MCONTEXT_OFFSET_D14");
  53 _Static_assert(offsetof(struct __darwin_mcontext64, __ns.__v[15]) == (MCONTEXT_OFFSET_D15 - 8),
  54                 "MCONTEXT_OFFSET_D15");
  55
  56 #if __has_feature(ptrauth_calls)
  57 _Static_assert((1 << LR_SIGNED_WITH_IB_BIT) == LR_SIGNED_WITH_IB, "LR_SIGNED_WITH_IB_BIT");
  58 #endif